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1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer
c1017a4c 3 * Copyright (c) by Jaroslav Kysela <[email protected]>
1da177e4
LT		 4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
1da177e4 22#include <linux/mm.h>
da155d5b 23#include <linux/module.h>
1da177e4
LT		 24#include <linux/file.h>
25#include <linux/slab.h>
26#include <linux/time.h>
e8db0be1 27#include <linux/pm_qos.h>
a27bb332 28#include <linux/aio.h>
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;
4eeaaeae
PLB		 605 status->audio_tstamp =
606 runtime->status->audio_tstamp;
8c121586
JK		 607 goto _tstamp_end;
608 }
609 }
a713b583 610 snd_pcm_gettime(runtime, &status->tstamp);
8c121586 611 _tstamp_end:
1da177e4
LT		 612 status->appl_ptr = runtime->control->appl_ptr;
613 status->hw_ptr = runtime->status->hw_ptr;
614 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
615 status->avail = snd_pcm_playback_avail(runtime);
616 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
4bbe1ddf 617 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1da177e4 618 status->delay = runtime->buffer_size - status->avail;
4bbe1ddf
TI		 619 status->delay += runtime->delay;
620 } else
1da177e4
LT		 621 status->delay = 0;
622 } else {
623 status->avail = snd_pcm_capture_avail(runtime);
624 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
4bbe1ddf 625 status->delay = status->avail + runtime->delay;
1da177e4
LT		 626 else
627 status->delay = 0;
628 }
629 status->avail_max = runtime->avail_max;
630 status->overrange = runtime->overrange;
631 runtime->avail_max = 0;
632 runtime->overrange = 0;
633 _end:
634 snd_pcm_stream_unlock_irq(substream);
635 return 0;
636}
637
877211f5
TI		 638static int snd_pcm_status_user(struct snd_pcm_substream *substream,
639 struct snd_pcm_status __user * _status)
1da177e4 640{
877211f5 641 struct snd_pcm_status status;
1da177e4
LT		 642 int res;
643
1da177e4
LT		 644 memset(&status, 0, sizeof(status));
645 res = snd_pcm_status(substream, &status);
646 if (res < 0)
647 return res;
648 if (copy_to_user(_status, &status, sizeof(status)))
649 return -EFAULT;
650 return 0;
651}
652
877211f5
TI		 653static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
654 struct snd_pcm_channel_info * info)
1da177e4 655{
877211f5 656 struct snd_pcm_runtime *runtime;
1da177e4
LT		 657 unsigned int channel;
658
1da177e4
LT		 659 channel = info->channel;
660 runtime = substream->runtime;
661 snd_pcm_stream_lock_irq(substream);
662 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
663 snd_pcm_stream_unlock_irq(substream);
664 return -EBADFD;
665 }
666 snd_pcm_stream_unlock_irq(substream);
667 if (channel >= runtime->channels)
668 return -EINVAL;
669 memset(info, 0, sizeof(*info));
670 info->channel = channel;
671 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
672}
673
877211f5
TI		 674static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
675 struct snd_pcm_channel_info __user * _info)
1da177e4 676{
877211f5 677 struct snd_pcm_channel_info info;
1da177e4
LT		 678 int res;
679
680 if (copy_from_user(&info, _info, sizeof(info)))
681 return -EFAULT;
682 res = snd_pcm_channel_info(substream, &info);
683 if (res < 0)
684 return res;
685 if (copy_to_user(_info, &info, sizeof(info)))
686 return -EFAULT;
687 return 0;
688}
689
877211f5 690static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 691{
877211f5 692 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 693 if (runtime->trigger_master == NULL)
694 return;
695 if (runtime->trigger_master == substream) {
b751eef1 696 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 697 } else {
698 snd_pcm_trigger_tstamp(runtime->trigger_master);
699 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
700 }
701 runtime->trigger_master = NULL;
702}
703
704struct action_ops {
877211f5
TI		 705 int (*pre_action)(struct snd_pcm_substream *substream, int state);
706 int (*do_action)(struct snd_pcm_substream *substream, int state);
707 void (*undo_action)(struct snd_pcm_substream *substream, int state);
708 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 709};
710
711/*
712 * this functions is core for handling of linked stream
713 * Note: the stream state might be changed also on failure
714 * Note2: call with calling stream lock + link lock
715 */
716static int snd_pcm_action_group(struct action_ops *ops,
877211f5 717 struct snd_pcm_substream *substream,
1da177e4
LT		 718 int state, int do_lock)
719{
877211f5
TI		 720 struct snd_pcm_substream *s = NULL;
721 struct snd_pcm_substream *s1;
1da177e4
LT		 722 int res = 0;
723
ef991b95 724 snd_pcm_group_for_each_entry(s, substream) {
1da177e4 725 if (do_lock && s != substream)
208eee2a
FD		 726 spin_lock_nested(&s->self_group.lock,
727 SINGLE_DEPTH_NESTING);
1da177e4
LT		 728 res = ops->pre_action(s, state);
729 if (res < 0)
730 goto _unlock;
731 }
ef991b95 732 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 733 res = ops->do_action(s, state);
734 if (res < 0) {
735 if (ops->undo_action) {
ef991b95 736 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 737 if (s1 == s) /* failed stream */
738 break;
739 ops->undo_action(s1, state);
740 }
741 }
742 s = NULL; /* unlock all */
743 goto _unlock;
744 }
745 }
ef991b95 746 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 747 ops->post_action(s, state);
748 }
749 _unlock:
750 if (do_lock) {
751 /* unlock streams */
ef991b95 752 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 753 if (s1 != substream)
754 spin_unlock(&s1->self_group.lock);
755 if (s1 == s) /* end */
756 break;
757 }
758 }
759 return res;
760}
761
762/*
763 * Note: call with stream lock
764 */
765static int snd_pcm_action_single(struct action_ops *ops,
877211f5 766 struct snd_pcm_substream *substream,
1da177e4
LT		 767 int state)
768{
769 int res;
770
771 res = ops->pre_action(substream, state);
772 if (res < 0)
773 return res;
774 res = ops->do_action(substream, state);
775 if (res == 0)
776 ops->post_action(substream, state);
777 else if (ops->undo_action)
778 ops->undo_action(substream, state);
779 return res;
780}
781
782/*
783 * Note: call with stream lock
784 */
785static int snd_pcm_action(struct action_ops *ops,
877211f5 786 struct snd_pcm_substream *substream,
1da177e4
LT		 787 int state)
788{
789 int res;
790
791 if (snd_pcm_stream_linked(substream)) {
792 if (!spin_trylock(&substream->group->lock)) {
793 spin_unlock(&substream->self_group.lock);
794 spin_lock(&substream->group->lock);
795 spin_lock(&substream->self_group.lock);
796 }
797 res = snd_pcm_action_group(ops, substream, state, 1);
798 spin_unlock(&substream->group->lock);
799 } else {
800 res = snd_pcm_action_single(ops, substream, state);
801 }
802 return res;
803}
804
805/*
806 * Note: don't use any locks before
807 */
808static int snd_pcm_action_lock_irq(struct action_ops *ops,
877211f5 809 struct snd_pcm_substream *substream,
1da177e4
LT		 810 int state)
811{
812 int res;
813
814 read_lock_irq(&snd_pcm_link_rwlock);
815 if (snd_pcm_stream_linked(substream)) {
816 spin_lock(&substream->group->lock);
817 spin_lock(&substream->self_group.lock);
818 res = snd_pcm_action_group(ops, substream, state, 1);
819 spin_unlock(&substream->self_group.lock);
820 spin_unlock(&substream->group->lock);
821 } else {
822 spin_lock(&substream->self_group.lock);
823 res = snd_pcm_action_single(ops, substream, state);
824 spin_unlock(&substream->self_group.lock);
825 }
826 read_unlock_irq(&snd_pcm_link_rwlock);
827 return res;
828}
829
830/*
831 */
832static int snd_pcm_action_nonatomic(struct action_ops *ops,
877211f5 833 struct snd_pcm_substream *substream,
1da177e4
LT		 834 int state)
835{
836 int res;
837
838 down_read(&snd_pcm_link_rwsem);
839 if (snd_pcm_stream_linked(substream))
840 res = snd_pcm_action_group(ops, substream, state, 0);
841 else
842 res = snd_pcm_action_single(ops, substream, state);
843 up_read(&snd_pcm_link_rwsem);
844 return res;
845}
846
847/*
848 * start callbacks
849 */
877211f5 850static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 851{
877211f5 852 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 853 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
854 return -EBADFD;
855 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
856 !snd_pcm_playback_data(substream))
857 return -EPIPE;
858 runtime->trigger_master = substream;
859 return 0;
860}
861
877211f5 862static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 863{
864 if (substream->runtime->trigger_master != substream)
865 return 0;
866 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
867}
868
877211f5 869static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 870{
871 if (substream->runtime->trigger_master == substream)
872 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
873}
874
877211f5 875static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 876{
877211f5 877 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 878 snd_pcm_trigger_tstamp(substream);
6af3fb72 879 runtime->hw_ptr_jiffies = jiffies;
bd76af0f
JK		 880 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
881 runtime->rate;
1da177e4
LT		 882 runtime->status->state = state;
883 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
884 runtime->silence_size > 0)
885 snd_pcm_playback_silence(substream, ULONG_MAX);
1da177e4 886 if (substream->timer)
877211f5
TI		 887 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
888 &runtime->trigger_tstamp);
1da177e4
LT		 889}
890
891static struct action_ops snd_pcm_action_start = {
892 .pre_action = snd_pcm_pre_start,
893 .do_action = snd_pcm_do_start,
894 .undo_action = snd_pcm_undo_start,
895 .post_action = snd_pcm_post_start
896};
897
898/**
1c85cc64 899 * snd_pcm_start - start all linked streams
df8db936 900 * @substream: the PCM substream instance
eb7c06e8
YB		 901 *
902 * Return: Zero if successful, or a negative error code.
1da177e4 903 */
877211f5 904int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 905{
877211f5
TI		 906 return snd_pcm_action(&snd_pcm_action_start, substream,
907 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 908}
909
910/*
911 * stop callbacks
912 */
877211f5 913static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 914{
877211f5 915 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 916 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
917 return -EBADFD;
918 runtime->trigger_master = substream;
919 return 0;
920}
921
877211f5 922static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 923{
924 if (substream->runtime->trigger_master == substream &&
925 snd_pcm_running(substream))
926 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
927 return 0; /* unconditonally stop all substreams */
928}
929
877211f5 930static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 931{
877211f5 932 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 933 if (runtime->status->state != state) {
934 snd_pcm_trigger_tstamp(substream);
935 if (substream->timer)
877211f5
TI		 936 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
937 &runtime->trigger_tstamp);
1da177e4 938 runtime->status->state = state;
1da177e4
LT		 939 }
940 wake_up(&runtime->sleep);
c91a988d 941 wake_up(&runtime->tsleep);
1da177e4
LT		 942}
943
944static struct action_ops snd_pcm_action_stop = {
945 .pre_action = snd_pcm_pre_stop,
946 .do_action = snd_pcm_do_stop,
947 .post_action = snd_pcm_post_stop
948};
949
950/**
1c85cc64 951 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 952 * @substream: the PCM substream instance
953 * @state: PCM state after stopping the stream
1da177e4 954 *
1c85cc64 955 * The state of each stream is then changed to the given state unconditionally.
eb7c06e8
YB		 956 *
957 * Return: Zero if succesful, or a negative error code.
1da177e4 958 */
fea952e5 959int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1da177e4
LT		 960{
961 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
962}
963
e88e8ae6
TI		 964EXPORT_SYMBOL(snd_pcm_stop);
965
1da177e4 966/**
1c85cc64 967 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 968 * @substream: the PCM substream
1da177e4 969 *
1c85cc64 970 * After stopping, the state is changed to SETUP.
1da177e4 971 * Unlike snd_pcm_stop(), this affects only the given stream.
eb7c06e8
YB		 972 *
973 * Return: Zero if succesful, or a negative error code.
1da177e4 974 */
877211f5 975int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 976{
877211f5
TI		 977 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
978 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 979}
980
981/*
982 * pause callbacks
983 */
877211f5 984static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 985{
877211f5 986 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 987 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
988 return -ENOSYS;
989 if (push) {
990 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
991 return -EBADFD;
992 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
993 return -EBADFD;
994 runtime->trigger_master = substream;
995 return 0;
996}
997
877211f5 998static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 999{
1000 if (substream->runtime->trigger_master != substream)
1001 return 0;
56385a12
JK		 1002 /* some drivers might use hw_ptr to recover from the pause -
1003 update the hw_ptr now */
1004 if (push)
1005 snd_pcm_update_hw_ptr(substream);
6af3fb72 1006 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
b595076a 1007 * a delta between the current jiffies, this gives a large enough
6af3fb72
TI		 1008 * delta, effectively to skip the check once.
1009 */
1010 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4
LT		 1011 return substream->ops->trigger(substream,
1012 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1013 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1014}
1015
877211f5 1016static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1017{
1018 if (substream->runtime->trigger_master == substream)
1019 substream->ops->trigger(substream,
1020 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1021 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1022}
1023
877211f5 1024static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1025{
877211f5 1026 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1027 snd_pcm_trigger_tstamp(substream);
1028 if (push) {
1029 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1030 if (substream->timer)
877211f5
TI		 1031 snd_timer_notify(substream->timer,
1032 SNDRV_TIMER_EVENT_MPAUSE,
1033 &runtime->trigger_tstamp);
1da177e4 1034 wake_up(&runtime->sleep);
c91a988d 1035 wake_up(&runtime->tsleep);
1da177e4
LT		 1036 } else {
1037 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1da177e4 1038 if (substream->timer)
877211f5
TI		 1039 snd_timer_notify(substream->timer,
1040 SNDRV_TIMER_EVENT_MCONTINUE,
1041 &runtime->trigger_tstamp);
1da177e4
LT		 1042 }
1043}
1044
1045static struct action_ops snd_pcm_action_pause = {
1046 .pre_action = snd_pcm_pre_pause,
1047 .do_action = snd_pcm_do_pause,
1048 .undo_action = snd_pcm_undo_pause,
1049 .post_action = snd_pcm_post_pause
1050};
1051
1052/*
1053 * Push/release the pause for all linked streams.
1054 */
877211f5 1055static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1056{
1057 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1058}
1059
1060#ifdef CONFIG_PM
1061/* suspend */
1062
877211f5 1063static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1064{
877211f5 1065 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1066 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1067 return -EBUSY;
1068 runtime->trigger_master = substream;
1069 return 0;
1070}
1071
877211f5 1072static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1073{
877211f5 1074 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1075 if (runtime->trigger_master != substream)
1076 return 0;
1077 if (! snd_pcm_running(substream))
1078 return 0;
1079 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1080 return 0; /* suspend unconditionally */
1081}
1082
877211f5 1083static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1084{
877211f5 1085 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1086 snd_pcm_trigger_tstamp(substream);
1087 if (substream->timer)
877211f5
TI		 1088 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1089 &runtime->trigger_tstamp);
1da177e4
LT		 1090 runtime->status->suspended_state = runtime->status->state;
1091 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1da177e4 1092 wake_up(&runtime->sleep);
c91a988d 1093 wake_up(&runtime->tsleep);
1da177e4
LT		 1094}
1095
1096static struct action_ops snd_pcm_action_suspend = {
1097 .pre_action = snd_pcm_pre_suspend,
1098 .do_action = snd_pcm_do_suspend,
1099 .post_action = snd_pcm_post_suspend
1100};
1101
1102/**
1c85cc64 1103 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1104 * @substream: the PCM substream
1da177e4 1105 *
1da177e4 1106 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1107 *
1108 * Return: Zero if successful (or @substream is %NULL), or a negative error
1109 * code.
1da177e4 1110 */
877211f5 1111int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1112{
1113 int err;
1114 unsigned long flags;
1115
603bf524
TI		 1116 if (! substream)
1117 return 0;
1118
1da177e4
LT		 1119 snd_pcm_stream_lock_irqsave(substream, flags);
1120 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1121 snd_pcm_stream_unlock_irqrestore(substream, flags);
1122 return err;
1123}
1124
e88e8ae6
TI		 1125EXPORT_SYMBOL(snd_pcm_suspend);
1126
1da177e4 1127/**
1c85cc64 1128 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1129 * @pcm: the PCM instance
1da177e4 1130 *
1da177e4 1131 * After this call, all streams are changed to SUSPENDED state.
eb7c06e8
YB		 1132 *
1133 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1da177e4 1134 */
877211f5 1135int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1136{
877211f5 1137 struct snd_pcm_substream *substream;
1da177e4
LT		 1138 int stream, err = 0;
1139
603bf524
TI		 1140 if (! pcm)
1141 return 0;
1142
1da177e4 1143 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1144 for (substream = pcm->streams[stream].substream;
1145 substream; substream = substream->next) {
1da177e4
LT		 1146 /* FIXME: the open/close code should lock this as well */
1147 if (substream->runtime == NULL)
1148 continue;
1149 err = snd_pcm_suspend(substream);
1150 if (err < 0 && err != -EBUSY)
1151 return err;
1152 }
1153 }
1154 return 0;
1155}
1156
e88e8ae6
TI		 1157EXPORT_SYMBOL(snd_pcm_suspend_all);
1158
1da177e4
LT		 1159/* resume */
1160
877211f5 1161static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1162{
877211f5 1163 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1164 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1165 return -ENOSYS;
1166 runtime->trigger_master = substream;
1167 return 0;
1168}
1169
877211f5 1170static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1171{
877211f5 1172 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1173 if (runtime->trigger_master != substream)
1174 return 0;
1175 /* DMA not running previously? */
1176 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1177 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1178 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1179 return 0;
1180 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1181}
1182
877211f5 1183static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1184{
1185 if (substream->runtime->trigger_master == substream &&
1186 snd_pcm_running(substream))
1187 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1188}
1189
877211f5 1190static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1191{
877211f5 1192 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1193 snd_pcm_trigger_tstamp(substream);
1194 if (substream->timer)
877211f5
TI		 1195 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1196 &runtime->trigger_tstamp);
1da177e4 1197 runtime->status->state = runtime->status->suspended_state;
1da177e4
LT		 1198}
1199
1200static struct action_ops snd_pcm_action_resume = {
1201 .pre_action = snd_pcm_pre_resume,
1202 .do_action = snd_pcm_do_resume,
1203 .undo_action = snd_pcm_undo_resume,
1204 .post_action = snd_pcm_post_resume
1205};
1206
877211f5 1207static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1208{
877211f5 1209 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1210 int res;
1211
1212 snd_power_lock(card);
cbac4b0c 1213 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1214 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1215 snd_power_unlock(card);
1216 return res;
1217}
1218
1219#else
1220
877211f5 1221static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1222{
1223 return -ENOSYS;
1224}
1225
1226#endif /* CONFIG_PM */
1227
1228/*
1229 * xrun ioctl
1230 *
1231 * Change the RUNNING stream(s) to XRUN state.
1232 */
877211f5 1233static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1234{
877211f5
TI		 1235 struct snd_card *card = substream->pcm->card;
1236 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1237 int result;
1238
1239 snd_power_lock(card);
1240 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1241 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1242 if (result < 0)
1243 goto _unlock;
1244 }
1245
1246 snd_pcm_stream_lock_irq(substream);
1247 switch (runtime->status->state) {
1248 case SNDRV_PCM_STATE_XRUN:
1249 result = 0; /* already there */
1250 break;
1251 case SNDRV_PCM_STATE_RUNNING:
1252 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1253 break;
1254 default:
1255 result = -EBADFD;
1256 }
1257 snd_pcm_stream_unlock_irq(substream);
1258 _unlock:
1259 snd_power_unlock(card);
1260 return result;
1261}
1262
1263/*
1264 * reset ioctl
1265 */
877211f5 1266static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1267{
877211f5 1268 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1269 switch (runtime->status->state) {
1270 case SNDRV_PCM_STATE_RUNNING:
1271 case SNDRV_PCM_STATE_PREPARED:
1272 case SNDRV_PCM_STATE_PAUSED:
1273 case SNDRV_PCM_STATE_SUSPENDED:
1274 return 0;
1275 default:
1276 return -EBADFD;
1277 }
1278}
1279
877211f5 1280static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1281{
877211f5 1282 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1283 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1284 if (err < 0)
1285 return err;
1da177e4 1286 runtime->hw_ptr_base = 0;
e7636925
JK		 1287 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1288 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1289 runtime->silence_start = runtime->status->hw_ptr;
1290 runtime->silence_filled = 0;
1291 return 0;
1292}
1293
877211f5 1294static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1295{
877211f5 1296 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1297 runtime->control->appl_ptr = runtime->status->hw_ptr;
1298 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1299 runtime->silence_size > 0)
1300 snd_pcm_playback_silence(substream, ULONG_MAX);
1301}
1302
1303static struct action_ops snd_pcm_action_reset = {
1304 .pre_action = snd_pcm_pre_reset,
1305 .do_action = snd_pcm_do_reset,
1306 .post_action = snd_pcm_post_reset
1307};
1308
877211f5 1309static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1310{
1311 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1312}
1313
1314/*
1315 * prepare ioctl
1316 */
0df63e44
TI		 1317/* we use the second argument for updating f_flags */
1318static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1319 int f_flags)
1da177e4 1320{
877211f5 1321 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1322 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1323 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1324 return -EBADFD;
1325 if (snd_pcm_running(substream))
1326 return -EBUSY;
0df63e44 1327 substream->f_flags = f_flags;
1da177e4
LT		 1328 return 0;
1329}
1330
877211f5 1331static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1332{
1333 int err;
1334 err = substream->ops->prepare(substream);
1335 if (err < 0)
1336 return err;
1337 return snd_pcm_do_reset(substream, 0);
1338}
1339
877211f5 1340static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1341{
877211f5 1342 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1343 runtime->control->appl_ptr = runtime->status->hw_ptr;
9b0573c0 1344 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1da177e4
LT		 1345}
1346
1347static struct action_ops snd_pcm_action_prepare = {
1348 .pre_action = snd_pcm_pre_prepare,
1349 .do_action = snd_pcm_do_prepare,
1350 .post_action = snd_pcm_post_prepare
1351};
1352
1353/**
1c85cc64 1354 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1355 * @substream: the PCM substream instance
0df63e44 1356 * @file: file to refer f_flags
eb7c06e8
YB		 1357 *
1358 * Return: Zero if successful, or a negative error code.
1da177e4 1359 */
0df63e44
TI		 1360static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1361 struct file *file)
1da177e4
LT		 1362{
1363 int res;
877211f5 1364 struct snd_card *card = substream->pcm->card;
0df63e44
TI		 1365 int f_flags;
1366
1367 if (file)
1368 f_flags = file->f_flags;
1369 else
1370 f_flags = substream->f_flags;
1da177e4
LT		 1371
1372 snd_power_lock(card);
cbac4b0c 1373 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
0df63e44
TI		 1374 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1375 substream, f_flags);
1da177e4
LT		 1376 snd_power_unlock(card);
1377 return res;
1378}
1379
1380/*
1381 * drain ioctl
1382 */
1383
877211f5 1384static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1385{
4f7c39dc
TI		 1386 struct snd_pcm_runtime *runtime = substream->runtime;
1387 switch (runtime->status->state) {
1388 case SNDRV_PCM_STATE_OPEN:
1389 case SNDRV_PCM_STATE_DISCONNECTED:
1390 case SNDRV_PCM_STATE_SUSPENDED:
1391 return -EBADFD;
1392 }
1393 runtime->trigger_master = substream;
1da177e4
LT		 1394 return 0;
1395}
1396
877211f5 1397static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1398{
877211f5 1399 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1400 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1401 switch (runtime->status->state) {
1402 case SNDRV_PCM_STATE_PREPARED:
1403 /* start playback stream if possible */
1404 if (! snd_pcm_playback_empty(substream)) {
1405 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1406 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1407 }
1408 break;
1409 case SNDRV_PCM_STATE_RUNNING:
1410 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1411 break;
4f7c39dc
TI		 1412 case SNDRV_PCM_STATE_XRUN:
1413 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1414 break;
1da177e4
LT		 1415 default:
1416 break;
1417 }
1418 } else {
1419 /* stop running stream */
1420 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
b05e5787 1421 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1422 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1423 snd_pcm_do_stop(substream, new_state);
1424 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1425 }
1426 }
1427 return 0;
1428}
1429
877211f5 1430static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1431{
1432}
1433
1434static struct action_ops snd_pcm_action_drain_init = {
1435 .pre_action = snd_pcm_pre_drain_init,
1436 .do_action = snd_pcm_do_drain_init,
1437 .post_action = snd_pcm_post_drain_init
1438};
1439
877211f5 1440static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1441
1442/*
1443 * Drain the stream(s).
1444 * When the substream is linked, sync until the draining of all playback streams
1445 * is finished.
1446 * After this call, all streams are supposed to be either SETUP or DRAINING
1447 * (capture only) state.
1448 */
4cdc115f
TI		 1449static int snd_pcm_drain(struct snd_pcm_substream *substream,
1450 struct file *file)
1da177e4 1451{
877211f5
TI		 1452 struct snd_card *card;
1453 struct snd_pcm_runtime *runtime;
ef991b95 1454 struct snd_pcm_substream *s;
d3a7dcfe 1455 wait_queue_t wait;
1da177e4 1456 int result = 0;
4cdc115f 1457 int nonblock = 0;
1da177e4 1458
1da177e4
LT		 1459 card = substream->pcm->card;
1460 runtime = substream->runtime;
1461
1462 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1463 return -EBADFD;
1464
1da177e4
LT		 1465 snd_power_lock(card);
1466 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1467 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1468 if (result < 0) {
1469 snd_power_unlock(card);
1470 return result;
1471 }
1da177e4
LT		 1472 }
1473
4cdc115f
TI		 1474 if (file) {
1475 if (file->f_flags & O_NONBLOCK)
1476 nonblock = 1;
1477 } else if (substream->f_flags & O_NONBLOCK)
1478 nonblock = 1;
1479
21cb2a2e 1480 down_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1481 snd_pcm_stream_lock_irq(substream);
1482 /* resume pause */
d3a7dcfe 1483 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
21cb2a2e
TI		 1484 snd_pcm_pause(substream, 0);
1485
1486 /* pre-start/stop - all running streams are changed to DRAINING state */
1487 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
4cdc115f
TI		 1488 if (result < 0)
1489 goto unlock;
1490 /* in non-blocking, we don't wait in ioctl but let caller poll */
1491 if (nonblock) {
1492 result = -EAGAIN;
1493 goto unlock;
21cb2a2e 1494 }
1da177e4
LT		 1495
1496 for (;;) {
1497 long tout;
d3a7dcfe 1498 struct snd_pcm_runtime *to_check;
1da177e4
LT		 1499 if (signal_pending(current)) {
1500 result = -ERESTARTSYS;
1501 break;
1502 }
d3a7dcfe
TI		 1503 /* find a substream to drain */
1504 to_check = NULL;
1505 snd_pcm_group_for_each_entry(s, substream) {
1506 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1507 continue;
1508 runtime = s->runtime;
1509 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1510 to_check = runtime;
21cb2a2e 1511 break;
d3a7dcfe 1512 }
21cb2a2e 1513 }
d3a7dcfe
TI		 1514 if (!to_check)
1515 break; /* all drained */
1516 init_waitqueue_entry(&wait, current);
1517 add_wait_queue(&to_check->sleep, &wait);
1da177e4 1518 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1519 up_read(&snd_pcm_link_rwsem);
1da177e4 1520 snd_power_unlock(card);
f2b3614c
TI		 1521 if (runtime->no_period_wakeup)
1522 tout = MAX_SCHEDULE_TIMEOUT;
1523 else {
1524 tout = 10;
1525 if (runtime->rate) {
1526 long t = runtime->period_size * 2 / runtime->rate;
1527 tout = max(t, tout);
1528 }
1529 tout = msecs_to_jiffies(tout * 1000);
1530 }
1531 tout = schedule_timeout_interruptible(tout);
1da177e4 1532 snd_power_lock(card);
d3a7dcfe 1533 down_read(&snd_pcm_link_rwsem);
1da177e4 1534 snd_pcm_stream_lock_irq(substream);
d3a7dcfe 1535 remove_wait_queue(&to_check->sleep, &wait);
0914f796
TI		 1536 if (card->shutdown) {
1537 result = -ENODEV;
1538 break;
1539 }
1da177e4
LT		 1540 if (tout == 0) {
1541 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1542 result = -ESTRPIPE;
1543 else {
1544 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1545 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1546 result = -EIO;
1547 }
1548 break;
1549 }
1da177e4 1550 }
21cb2a2e 1551
4cdc115f 1552 unlock:
21cb2a2e 1553 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1554 up_read(&snd_pcm_link_rwsem);
1da177e4 1555 snd_power_unlock(card);
1da177e4
LT		 1556
1557 return result;
1558}
1559
1560/*
1561 * drop ioctl
1562 *
1563 * Immediately put all linked substreams into SETUP state.
1564 */
877211f5 1565static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1566{
877211f5 1567 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1568 int result = 0;
1569
7eaa943c
TI		 1570 if (PCM_RUNTIME_CHECK(substream))
1571 return -ENXIO;
1da177e4 1572 runtime = substream->runtime;
1da177e4 1573
de1b8b93 1574 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
24e8fc49
TI		 1575 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1576 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1da177e4
LT		 1577 return -EBADFD;
1578
1da177e4
LT		 1579 snd_pcm_stream_lock_irq(substream);
1580 /* resume pause */
1581 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1582 snd_pcm_pause(substream, 0);
1583
1584 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1585 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1586 snd_pcm_stream_unlock_irq(substream);
24e8fc49 1587
1da177e4
LT		 1588 return result;
1589}
1590
1591
1592/* WARNING: Don't forget to fput back the file */
bdbf6943 1593static struct file *snd_pcm_file_fd(int fd, int *fput_needed)
1da177e4
LT		 1594{
1595 struct file *file;
1596 struct inode *inode;
f87135f5
CL		 1597 unsigned int minor;
1598
bdbf6943 1599 file = fget_light(fd, fput_needed);
1da177e4
LT		 1600 if (!file)
1601 return NULL;
496ad9aa 1602 inode = file_inode(file);
1da177e4
LT		 1603 if (!S_ISCHR(inode->i_mode) ||
1604 imajor(inode) != snd_major) {
bdbf6943 1605 fput_light(file, *fput_needed);
1da177e4
LT		 1606 return NULL;
1607 }
1608 minor = iminor(inode);
f87135f5
CL		 1609 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1610 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
bdbf6943 1611 fput_light(file, *fput_needed);
1da177e4
LT		 1612 return NULL;
1613 }
1614 return file;
1615}
1616
1617/*
1618 * PCM link handling
1619 */
877211f5 1620static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1621{
1622 int res = 0;
1623 struct file *file;
877211f5
TI		 1624 struct snd_pcm_file *pcm_file;
1625 struct snd_pcm_substream *substream1;
1662591b 1626 struct snd_pcm_group *group;
bdbf6943 1627 int fput_needed;
1da177e4 1628
bdbf6943 1629 file = snd_pcm_file_fd(fd, &fput_needed);
1da177e4
LT		 1630 if (!file)
1631 return -EBADFD;
1632 pcm_file = file->private_data;
1633 substream1 = pcm_file->substream;
1662591b
TI		 1634 group = kmalloc(sizeof(*group), GFP_KERNEL);
1635 if (!group) {
1636 res = -ENOMEM;
1637 goto _nolock;
1638 }
1da177e4
LT		 1639 down_write(&snd_pcm_link_rwsem);
1640 write_lock_irq(&snd_pcm_link_rwlock);
1641 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1642 substream->runtime->status->state != substream1->runtime->status->state) {
1643 res = -EBADFD;
1644 goto _end;
1645 }
1646 if (snd_pcm_stream_linked(substream1)) {
1647 res = -EALREADY;
1648 goto _end;
1649 }
1650 if (!snd_pcm_stream_linked(substream)) {
1662591b 1651 substream->group = group;
dd6c5cd8 1652 group = NULL;
1da177e4
LT		 1653 spin_lock_init(&substream->group->lock);
1654 INIT_LIST_HEAD(&substream->group->substreams);
1655 list_add_tail(&substream->link_list, &substream->group->substreams);
1656 substream->group->count = 1;
1657 }
1658 list_add_tail(&substream1->link_list, &substream->group->substreams);
1659 substream->group->count++;
1660 substream1->group = substream->group;
1661 _end:
1662 write_unlock_irq(&snd_pcm_link_rwlock);
1663 up_write(&snd_pcm_link_rwsem);
1662591b 1664 _nolock:
a0830dbd 1665 snd_card_unref(substream1->pcm->card);
bdbf6943 1666 fput_light(file, fput_needed);
dd6c5cd8 1667 kfree(group);
1da177e4
LT		 1668 return res;
1669}
1670
877211f5 1671static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1672{
1673 substream->group = &substream->self_group;
1674 INIT_LIST_HEAD(&substream->self_group.substreams);
1675 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1676}
1677
877211f5 1678static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 1679{
ef991b95 1680 struct snd_pcm_substream *s;
1da177e4
LT		 1681 int res = 0;
1682
1683 down_write(&snd_pcm_link_rwsem);
1684 write_lock_irq(&snd_pcm_link_rwlock);
1685 if (!snd_pcm_stream_linked(substream)) {
1686 res = -EALREADY;
1687 goto _end;
1688 }
1689 list_del(&substream->link_list);
1690 substream->group->count--;
1691 if (substream->group->count == 1) { /* detach the last stream, too */
ef991b95
TI		 1692 snd_pcm_group_for_each_entry(s, substream) {
1693 relink_to_local(s);
1da177e4
LT		 1694 break;
1695 }
1696 kfree(substream->group);
1697 }
1698 relink_to_local(substream);
1699 _end:
1700 write_unlock_irq(&snd_pcm_link_rwlock);
1701 up_write(&snd_pcm_link_rwsem);
1702 return res;
1703}
1704
1705/*
1706 * hw configurator
1707 */
877211f5
TI		 1708static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1709 struct snd_pcm_hw_rule *rule)
1da177e4 1710{
877211f5 1711 struct snd_interval t;
1da177e4
LT		 1712 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1713 hw_param_interval_c(params, rule->deps[1]), &t);
1714 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1715}
1716
877211f5
TI		 1717static int snd_pcm_hw_rule_div(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_div(hw_param_interval_c(params, rule->deps[0]),
1722 hw_param_interval_c(params, rule->deps[1]), &t);
1723 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1724}
1725
877211f5
TI		 1726static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1727 struct snd_pcm_hw_rule *rule)
1da177e4 1728{
877211f5 1729 struct snd_interval t;
1da177e4
LT		 1730 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1731 hw_param_interval_c(params, rule->deps[1]),
1732 (unsigned long) rule->private, &t);
1733 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1734}
1735
877211f5
TI		 1736static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1737 struct snd_pcm_hw_rule *rule)
1da177e4 1738{
877211f5 1739 struct snd_interval t;
1da177e4
LT		 1740 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1741 (unsigned long) rule->private,
1742 hw_param_interval_c(params, rule->deps[1]), &t);
1743 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1744}
1745
877211f5
TI		 1746static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1747 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1748{
1749 unsigned int k;
877211f5
TI		 1750 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1751 struct snd_mask m;
1752 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1753 snd_mask_any(&m);
1754 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1755 int bits;
1756 if (! snd_mask_test(mask, k))
1757 continue;
1758 bits = snd_pcm_format_physical_width(k);
1759 if (bits <= 0)
1760 continue; /* ignore invalid formats */
1761 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1762 snd_mask_reset(&m, k);
1763 }
1764 return snd_mask_refine(mask, &m);
1765}
1766
877211f5
TI		 1767static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1768 struct snd_pcm_hw_rule *rule)
1da177e4 1769{
877211f5 1770 struct snd_interval t;
1da177e4
LT		 1771 unsigned int k;
1772 t.min = UINT_MAX;
1773 t.max = 0;
1774 t.openmin = 0;
1775 t.openmax = 0;
1776 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1777 int bits;
1778 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1779 continue;
1780 bits = snd_pcm_format_physical_width(k);
1781 if (bits <= 0)
1782 continue; /* ignore invalid formats */
1783 if (t.min > (unsigned)bits)
1784 t.min = bits;
1785 if (t.max < (unsigned)bits)
1786 t.max = bits;
1787 }
1788 t.integer = 1;
1789 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1790}
1791
1792#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1793#error "Change this table"
1794#endif
1795
1796static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1797 48000, 64000, 88200, 96000, 176400, 192000 };
1798
7653d557
CL		 1799const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1800 .count = ARRAY_SIZE(rates),
1801 .list = rates,
1802};
1803
877211f5
TI		 1804static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1805 struct snd_pcm_hw_rule *rule)
1da177e4 1806{
877211f5 1807 struct snd_pcm_hardware *hw = rule->private;
1da177e4 1808 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 1809 snd_pcm_known_rates.count,
1810 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 1811}
1812
877211f5
TI		 1813static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1814 struct snd_pcm_hw_rule *rule)
1da177e4 1815{
877211f5
TI		 1816 struct snd_interval t;
1817 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 1818 t.min = 0;
1819 t.max = substream->buffer_bytes_max;
1820 t.openmin = 0;
1821 t.openmax = 0;
1822 t.integer = 1;
1823 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1824}
1825
877211f5 1826int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 1827{
877211f5
TI		 1828 struct snd_pcm_runtime *runtime = substream->runtime;
1829 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 1830 int k, err;
1831
1832 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1833 snd_mask_any(constrs_mask(constrs, k));
1834 }
1835
1836 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1837 snd_interval_any(constrs_interval(constrs, k));
1838 }
1839
1840 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1841 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1842 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1843 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1844 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1845
1846 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1847 snd_pcm_hw_rule_format, NULL,
1848 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1849 if (err < 0)
1850 return err;
1851 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1852 snd_pcm_hw_rule_sample_bits, NULL,
1853 SNDRV_PCM_HW_PARAM_FORMAT,
1854 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1855 if (err < 0)
1856 return err;
1857 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1858 snd_pcm_hw_rule_div, NULL,
1859 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1860 if (err < 0)
1861 return err;
1862 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1863 snd_pcm_hw_rule_mul, NULL,
1864 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1865 if (err < 0)
1866 return err;
1867 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1868 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1869 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1870 if (err < 0)
1871 return err;
1872 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1873 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1874 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1875 if (err < 0)
1876 return err;
1877 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1878 snd_pcm_hw_rule_div, NULL,
1879 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1880 if (err < 0)
1881 return err;
1882 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1883 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1884 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1885 if (err < 0)
1886 return err;
1887 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1888 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1889 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1890 if (err < 0)
1891 return err;
1892 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1893 snd_pcm_hw_rule_div, NULL,
1894 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1895 if (err < 0)
1896 return err;
1897 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1898 snd_pcm_hw_rule_div, NULL,
1899 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1900 if (err < 0)
1901 return err;
1902 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1903 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1904 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1905 if (err < 0)
1906 return err;
1907 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1908 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1909 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1910 if (err < 0)
1911 return err;
1912 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1913 snd_pcm_hw_rule_mul, NULL,
1914 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1915 if (err < 0)
1916 return err;
1917 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1918 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1919 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1920 if (err < 0)
1921 return err;
1922 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1923 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1924 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1925 if (err < 0)
1926 return err;
1927 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1928 snd_pcm_hw_rule_muldivk, (void*) 8,
1929 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1930 if (err < 0)
1931 return err;
1932 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1933 snd_pcm_hw_rule_muldivk, (void*) 8,
1934 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1935 if (err < 0)
1936 return err;
1937 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1938 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1939 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1940 if (err < 0)
1941 return err;
1942 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1943 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1944 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1945 if (err < 0)
1946 return err;
1947 return 0;
1948}
1949
877211f5 1950int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 1951{
877211f5
TI		 1952 struct snd_pcm_runtime *runtime = substream->runtime;
1953 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 1954 int err;
1955 unsigned int mask = 0;
1956
1957 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1958 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1959 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1960 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1961 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1962 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1963 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1964 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1965 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1966 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1967 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1968 }
1969 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 1970 if (err < 0)
1971 return err;
1da177e4
LT		 1972
1973 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 1974 if (err < 0)
1975 return err;
1da177e4
LT		 1976
1977 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
7eaa943c
TI		 1978 if (err < 0)
1979 return err;
1da177e4
LT		 1980
1981 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1982 hw->channels_min, hw->channels_max);
7eaa943c
TI		 1983 if (err < 0)
1984 return err;
1da177e4
LT		 1985
1986 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1987 hw->rate_min, hw->rate_max);
8b90ca08
GL		 1988 if (err < 0)
1989 return err;
1da177e4
LT		 1990
1991 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1992 hw->period_bytes_min, hw->period_bytes_max);
8b90ca08
GL		 1993 if (err < 0)
1994 return err;
1da177e4
LT		 1995
1996 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1997 hw->periods_min, hw->periods_max);
7eaa943c
TI		 1998 if (err < 0)
1999 return err;
1da177e4
LT		 2000
2001 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2002 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 2003 if (err < 0)
2004 return err;
1da177e4
LT		 2005
2006 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
2007 snd_pcm_hw_rule_buffer_bytes_max, substream,
2008 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2009 if (err < 0)
2010 return err;
2011
2012 /* FIXME: remove */
2013 if (runtime->dma_bytes) {
2014 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c 2015 if (err < 0)
6cf95152 2016 return err;
1da177e4
LT		 2017 }
2018
2019 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2020 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2021 snd_pcm_hw_rule_rate, hw,
2022 SNDRV_PCM_HW_PARAM_RATE, -1);
2023 if (err < 0)
2024 return err;
2025 }
2026
2027 /* FIXME: this belong to lowlevel */
1da177e4
LT		 2028 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2029
2030 return 0;
2031}
2032
3bf75f9b 2033static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2034{
1da177e4 2035 snd_pcm_unlink(substream);
3bf75f9b
TI		 2036}
2037
2038void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2039{
0df63e44
TI		 2040 substream->ref_count--;
2041 if (substream->ref_count > 0)
2042 return;
2043
3bf75f9b 2044 snd_pcm_drop(substream);
3bf75f9b 2045 if (substream->hw_opened) {
1da177e4
LT		 2046 if (substream->ops->hw_free != NULL)
2047 substream->ops->hw_free(substream);
2048 substream->ops->close(substream);
3bf75f9b 2049 substream->hw_opened = 0;
1da177e4 2050 }
8699a0b6
TI		 2051 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2052 pm_qos_remove_request(&substream->latency_pm_qos_req);
1576274d
TI		 2053 if (substream->pcm_release) {
2054 substream->pcm_release(substream);
2055 substream->pcm_release = NULL;
2056 }
3bf75f9b
TI		 2057 snd_pcm_detach_substream(substream);
2058}
2059
e88e8ae6
TI		 2060EXPORT_SYMBOL(snd_pcm_release_substream);
2061
3bf75f9b
TI		 2062int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2063 struct file *file,
2064 struct snd_pcm_substream **rsubstream)
2065{
2066 struct snd_pcm_substream *substream;
2067 int err;
2068
2069 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2070 if (err < 0)
2071 return err;
0df63e44
TI		 2072 if (substream->ref_count > 1) {
2073 *rsubstream = substream;
2074 return 0;
2075 }
2076
3bf75f9b
TI		 2077 err = snd_pcm_hw_constraints_init(substream);
2078 if (err < 0) {
2079 snd_printd("snd_pcm_hw_constraints_init failed\n");
2080 goto error;
2081 }
2082
2083 if ((err = substream->ops->open(substream)) < 0)
2084 goto error;
2085
2086 substream->hw_opened = 1;
2087
2088 err = snd_pcm_hw_constraints_complete(substream);
2089 if (err < 0) {
2090 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2091 goto error;
2092 }
2093
2094 *rsubstream = substream;
1da177e4 2095 return 0;
3bf75f9b
TI		 2096
2097 error:
2098 snd_pcm_release_substream(substream);
2099 return err;
1da177e4
LT		 2100}
2101
e88e8ae6
TI		 2102EXPORT_SYMBOL(snd_pcm_open_substream);
2103
1da177e4 2104static int snd_pcm_open_file(struct file *file,
877211f5 2105 struct snd_pcm *pcm,
ffd3d5c6 2106 int stream)
1da177e4 2107{
877211f5
TI		 2108 struct snd_pcm_file *pcm_file;
2109 struct snd_pcm_substream *substream;
3bf75f9b 2110 int err;
1da177e4 2111
3bf75f9b
TI		 2112 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2113 if (err < 0)
2114 return err;
2115
548a648b
TI		 2116 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2117 if (pcm_file == NULL) {
2118 snd_pcm_release_substream(substream);
2119 return -ENOMEM;
2120 }
2121 pcm_file->substream = substream;
2122 if (substream->ref_count == 1) {
0df63e44
TI		 2123 substream->file = pcm_file;
2124 substream->pcm_release = pcm_release_private;
1da177e4 2125 }
1da177e4 2126 file->private_data = pcm_file;
ffd3d5c6 2127
1da177e4
LT		 2128 return 0;
2129}
2130
f87135f5
CL		 2131static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2132{
2133 struct snd_pcm *pcm;
02f4865f
TI		 2134 int err = nonseekable_open(inode, file);
2135 if (err < 0)
2136 return err;
f87135f5
CL		 2137 pcm = snd_lookup_minor_data(iminor(inode),
2138 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
a0830dbd 2139 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
8bb4d9ce
TI		 2140 if (pcm)
2141 snd_card_unref(pcm->card);
a0830dbd 2142 return err;
f87135f5
CL		 2143}
2144
2145static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2146{
877211f5 2147 struct snd_pcm *pcm;
02f4865f
TI		 2148 int err = nonseekable_open(inode, file);
2149 if (err < 0)
2150 return err;
f87135f5
CL		 2151 pcm = snd_lookup_minor_data(iminor(inode),
2152 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
a0830dbd 2153 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
8bb4d9ce
TI		 2154 if (pcm)
2155 snd_card_unref(pcm->card);
a0830dbd 2156 return err;
f87135f5
CL		 2157}
2158
2159static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2160{
2161 int err;
1da177e4
LT		 2162 wait_queue_t wait;
2163
1da177e4
LT		 2164 if (pcm == NULL) {
2165 err = -ENODEV;
2166 goto __error1;
2167 }
2168 err = snd_card_file_add(pcm->card, file);
2169 if (err < 0)
2170 goto __error1;
2171 if (!try_module_get(pcm->card->module)) {
2172 err = -EFAULT;
2173 goto __error2;
2174 }
2175 init_waitqueue_entry(&wait, current);
2176 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2177 mutex_lock(&pcm->open_mutex);
1da177e4 2178 while (1) {
ffd3d5c6 2179 err = snd_pcm_open_file(file, pcm, stream);
1da177e4
LT		 2180 if (err >= 0)
2181 break;
2182 if (err == -EAGAIN) {
2183 if (file->f_flags & O_NONBLOCK) {
2184 err = -EBUSY;
2185 break;
2186 }
2187 } else
2188 break;
2189 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2190 mutex_unlock(&pcm->open_mutex);
1da177e4 2191 schedule();
1a60d4c5 2192 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2193 if (pcm->card->shutdown) {
2194 err = -ENODEV;
2195 break;
2196 }
1da177e4
LT		 2197 if (signal_pending(current)) {
2198 err = -ERESTARTSYS;
2199 break;
2200 }
2201 }
2202 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2203 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2204 if (err < 0)
2205 goto __error;
2206 return err;
2207
2208 __error:
2209 module_put(pcm->card->module);
2210 __error2:
2211 snd_card_file_remove(pcm->card, file);
2212 __error1:
2213 return err;
2214}
2215
2216static int snd_pcm_release(struct inode *inode, struct file *file)
2217{
877211f5
TI		 2218 struct snd_pcm *pcm;
2219 struct snd_pcm_substream *substream;
2220 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2221
2222 pcm_file = file->private_data;
2223 substream = pcm_file->substream;
7eaa943c
TI		 2224 if (snd_BUG_ON(!substream))
2225 return -ENXIO;
1da177e4 2226 pcm = substream->pcm;
1a60d4c5 2227 mutex_lock(&pcm->open_mutex);
3bf75f9b 2228 snd_pcm_release_substream(substream);
548a648b 2229 kfree(pcm_file);
1a60d4c5 2230 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2231 wake_up(&pcm->open_wait);
2232 module_put(pcm->card->module);
2233 snd_card_file_remove(pcm->card, file);
2234 return 0;
2235}
2236
877211f5
TI		 2237static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2238 snd_pcm_uframes_t frames)
1da177e4 2239{
877211f5 2240 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2241 snd_pcm_sframes_t appl_ptr;
2242 snd_pcm_sframes_t ret;
2243 snd_pcm_sframes_t hw_avail;
2244
2245 if (frames == 0)
2246 return 0;
2247
2248 snd_pcm_stream_lock_irq(substream);
2249 switch (runtime->status->state) {
2250 case SNDRV_PCM_STATE_PREPARED:
2251 break;
2252 case SNDRV_PCM_STATE_DRAINING:
2253 case SNDRV_PCM_STATE_RUNNING:
2254 if (snd_pcm_update_hw_ptr(substream) >= 0)
2255 break;
2256 /* Fall through */
2257 case SNDRV_PCM_STATE_XRUN:
2258 ret = -EPIPE;
2259 goto __end;
51840409
LR		 2260 case SNDRV_PCM_STATE_SUSPENDED:
2261 ret = -ESTRPIPE;
2262 goto __end;
1da177e4
LT		 2263 default:
2264 ret = -EBADFD;
2265 goto __end;
2266 }
2267
2268 hw_avail = snd_pcm_playback_hw_avail(runtime);
2269 if (hw_avail <= 0) {
2270 ret = 0;
2271 goto __end;
2272 }
2273 if (frames > (snd_pcm_uframes_t)hw_avail)
2274 frames = hw_avail;
1da177e4
LT		 2275 appl_ptr = runtime->control->appl_ptr - frames;
2276 if (appl_ptr < 0)
2277 appl_ptr += runtime->boundary;
2278 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2279 ret = frames;
2280 __end:
2281 snd_pcm_stream_unlock_irq(substream);
2282 return ret;
2283}
2284
877211f5
TI		 2285static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2286 snd_pcm_uframes_t frames)
1da177e4 2287{
877211f5 2288 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2289 snd_pcm_sframes_t appl_ptr;
2290 snd_pcm_sframes_t ret;
2291 snd_pcm_sframes_t hw_avail;
2292
2293 if (frames == 0)
2294 return 0;
2295
2296 snd_pcm_stream_lock_irq(substream);
2297 switch (runtime->status->state) {
2298 case SNDRV_PCM_STATE_PREPARED:
2299 case SNDRV_PCM_STATE_DRAINING:
2300 break;
2301 case SNDRV_PCM_STATE_RUNNING:
2302 if (snd_pcm_update_hw_ptr(substream) >= 0)
2303 break;
2304 /* Fall through */
2305 case SNDRV_PCM_STATE_XRUN:
2306 ret = -EPIPE;
2307 goto __end;
51840409
LR		 2308 case SNDRV_PCM_STATE_SUSPENDED:
2309 ret = -ESTRPIPE;
2310 goto __end;
1da177e4
LT		 2311 default:
2312 ret = -EBADFD;
2313 goto __end;
2314 }
2315
2316 hw_avail = snd_pcm_capture_hw_avail(runtime);
2317 if (hw_avail <= 0) {
2318 ret = 0;
2319 goto __end;
2320 }
2321 if (frames > (snd_pcm_uframes_t)hw_avail)
2322 frames = hw_avail;
1da177e4
LT		 2323 appl_ptr = runtime->control->appl_ptr - frames;
2324 if (appl_ptr < 0)
2325 appl_ptr += runtime->boundary;
2326 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2327 ret = frames;
2328 __end:
2329 snd_pcm_stream_unlock_irq(substream);
2330 return ret;
2331}
2332
877211f5
TI		 2333static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2334 snd_pcm_uframes_t frames)
1da177e4 2335{
877211f5 2336 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2337 snd_pcm_sframes_t appl_ptr;
2338 snd_pcm_sframes_t ret;
2339 snd_pcm_sframes_t avail;
2340
2341 if (frames == 0)
2342 return 0;
2343
2344 snd_pcm_stream_lock_irq(substream);
2345 switch (runtime->status->state) {
2346 case SNDRV_PCM_STATE_PREPARED:
2347 case SNDRV_PCM_STATE_PAUSED:
2348 break;
2349 case SNDRV_PCM_STATE_DRAINING:
2350 case SNDRV_PCM_STATE_RUNNING:
2351 if (snd_pcm_update_hw_ptr(substream) >= 0)
2352 break;
2353 /* Fall through */
2354 case SNDRV_PCM_STATE_XRUN:
2355 ret = -EPIPE;
2356 goto __end;
51840409
LR		 2357 case SNDRV_PCM_STATE_SUSPENDED:
2358 ret = -ESTRPIPE;
2359 goto __end;
1da177e4
LT		 2360 default:
2361 ret = -EBADFD;
2362 goto __end;
2363 }
2364
2365 avail = snd_pcm_playback_avail(runtime);
2366 if (avail <= 0) {
2367 ret = 0;
2368 goto __end;
2369 }
2370 if (frames > (snd_pcm_uframes_t)avail)
2371 frames = avail;
1da177e4
LT		 2372 appl_ptr = runtime->control->appl_ptr + frames;
2373 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2374 appl_ptr -= runtime->boundary;
2375 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2376 ret = frames;
2377 __end:
2378 snd_pcm_stream_unlock_irq(substream);
2379 return ret;
2380}
2381
877211f5
TI		 2382static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2383 snd_pcm_uframes_t frames)
1da177e4 2384{
877211f5 2385 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2386 snd_pcm_sframes_t appl_ptr;
2387 snd_pcm_sframes_t ret;
2388 snd_pcm_sframes_t avail;
2389
2390 if (frames == 0)
2391 return 0;
2392
2393 snd_pcm_stream_lock_irq(substream);
2394 switch (runtime->status->state) {
2395 case SNDRV_PCM_STATE_PREPARED:
2396 case SNDRV_PCM_STATE_DRAINING:
2397 case SNDRV_PCM_STATE_PAUSED:
2398 break;
2399 case SNDRV_PCM_STATE_RUNNING:
2400 if (snd_pcm_update_hw_ptr(substream) >= 0)
2401 break;
2402 /* Fall through */
2403 case SNDRV_PCM_STATE_XRUN:
2404 ret = -EPIPE;
2405 goto __end;
51840409
LR		 2406 case SNDRV_PCM_STATE_SUSPENDED:
2407 ret = -ESTRPIPE;
2408 goto __end;
1da177e4
LT		 2409 default:
2410 ret = -EBADFD;
2411 goto __end;
2412 }
2413
2414 avail = snd_pcm_capture_avail(runtime);
2415 if (avail <= 0) {
2416 ret = 0;
2417 goto __end;
2418 }
2419 if (frames > (snd_pcm_uframes_t)avail)
2420 frames = avail;
1da177e4
LT		 2421 appl_ptr = runtime->control->appl_ptr + frames;
2422 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2423 appl_ptr -= runtime->boundary;
2424 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2425 ret = frames;
2426 __end:
2427 snd_pcm_stream_unlock_irq(substream);
2428 return ret;
2429}
2430
877211f5 2431static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2432{
877211f5 2433 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2434 int err;
2435
2436 snd_pcm_stream_lock_irq(substream);
2437 switch (runtime->status->state) {
2438 case SNDRV_PCM_STATE_DRAINING:
2439 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2440 goto __badfd;
2441 case SNDRV_PCM_STATE_RUNNING:
2442 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2443 break;
2444 /* Fall through */
2445 case SNDRV_PCM_STATE_PREPARED:
2446 case SNDRV_PCM_STATE_SUSPENDED:
2447 err = 0;
2448 break;
2449 case SNDRV_PCM_STATE_XRUN:
2450 err = -EPIPE;
2451 break;
2452 default:
2453 __badfd:
2454 err = -EBADFD;
2455 break;
2456 }
2457 snd_pcm_stream_unlock_irq(substream);
2458 return err;
2459}
2460
877211f5
TI		 2461static int snd_pcm_delay(struct snd_pcm_substream *substream,
2462 snd_pcm_sframes_t __user *res)
1da177e4 2463{
877211f5 2464 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2465 int err;
2466 snd_pcm_sframes_t n = 0;
2467
2468 snd_pcm_stream_lock_irq(substream);
2469 switch (runtime->status->state) {
2470 case SNDRV_PCM_STATE_DRAINING:
2471 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2472 goto __badfd;
2473 case SNDRV_PCM_STATE_RUNNING:
2474 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2475 break;
2476 /* Fall through */
2477 case SNDRV_PCM_STATE_PREPARED:
2478 case SNDRV_PCM_STATE_SUSPENDED:
2479 err = 0;
2480 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2481 n = snd_pcm_playback_hw_avail(runtime);
2482 else
2483 n = snd_pcm_capture_avail(runtime);
4bbe1ddf 2484 n += runtime->delay;
1da177e4
LT		 2485 break;
2486 case SNDRV_PCM_STATE_XRUN:
2487 err = -EPIPE;
2488 break;
2489 default:
2490 __badfd:
2491 err = -EBADFD;
2492 break;
2493 }
2494 snd_pcm_stream_unlock_irq(substream);
2495 if (!err)
2496 if (put_user(n, res))
2497 err = -EFAULT;
2498 return err;
2499}
2500
877211f5
TI		 2501static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2502 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2503{
877211f5
TI		 2504 struct snd_pcm_runtime *runtime = substream->runtime;
2505 struct snd_pcm_sync_ptr sync_ptr;
2506 volatile struct snd_pcm_mmap_status *status;
2507 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2508 int err;
2509
2510 memset(&sync_ptr, 0, sizeof(sync_ptr));
2511 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2512 return -EFAULT;
877211f5 2513 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2514 return -EFAULT;
2515 status = runtime->status;
2516 control = runtime->control;
2517 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2518 err = snd_pcm_hwsync(substream);
2519 if (err < 0)
2520 return err;
2521 }
2522 snd_pcm_stream_lock_irq(substream);
2523 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2524 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2525 else
2526 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2527 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2528 control->avail_min = sync_ptr.c.control.avail_min;
2529 else
2530 sync_ptr.c.control.avail_min = control->avail_min;
2531 sync_ptr.s.status.state = status->state;
2532 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2533 sync_ptr.s.status.tstamp = status->tstamp;
2534 sync_ptr.s.status.suspended_state = status->suspended_state;
2535 snd_pcm_stream_unlock_irq(substream);
2536 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2537 return -EFAULT;
2538 return 0;
2539}
b751eef1
JK		 2540
2541static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2542{
2543 struct snd_pcm_runtime *runtime = substream->runtime;
2544 int arg;
2545
2546 if (get_user(arg, _arg))
2547 return -EFAULT;
2548 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2549 return -EINVAL;
2550 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2551 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2552 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2553 return 0;
2554}
1da177e4 2555
0df63e44
TI		 2556static int snd_pcm_common_ioctl1(struct file *file,
2557 struct snd_pcm_substream *substream,
1da177e4
LT		 2558 unsigned int cmd, void __user *arg)
2559{
1da177e4
LT		 2560 switch (cmd) {
2561 case SNDRV_PCM_IOCTL_PVERSION:
2562 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2563 case SNDRV_PCM_IOCTL_INFO:
2564 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 2565 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2566 return 0;
b751eef1
JK		 2567 case SNDRV_PCM_IOCTL_TTSTAMP:
2568 return snd_pcm_tstamp(substream, arg);
1da177e4
LT		 2569 case SNDRV_PCM_IOCTL_HW_REFINE:
2570 return snd_pcm_hw_refine_user(substream, arg);
2571 case SNDRV_PCM_IOCTL_HW_PARAMS:
2572 return snd_pcm_hw_params_user(substream, arg);
2573 case SNDRV_PCM_IOCTL_HW_FREE:
2574 return snd_pcm_hw_free(substream);
2575 case SNDRV_PCM_IOCTL_SW_PARAMS:
2576 return snd_pcm_sw_params_user(substream, arg);
2577 case SNDRV_PCM_IOCTL_STATUS:
2578 return snd_pcm_status_user(substream, arg);
2579 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2580 return snd_pcm_channel_info_user(substream, arg);
2581 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2582 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2583 case SNDRV_PCM_IOCTL_RESET:
2584 return snd_pcm_reset(substream);
2585 case SNDRV_PCM_IOCTL_START:
2586 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2587 case SNDRV_PCM_IOCTL_LINK:
2588 return snd_pcm_link(substream, (int)(unsigned long) arg);
2589 case SNDRV_PCM_IOCTL_UNLINK:
2590 return snd_pcm_unlink(substream);
2591 case SNDRV_PCM_IOCTL_RESUME:
2592 return snd_pcm_resume(substream);
2593 case SNDRV_PCM_IOCTL_XRUN:
2594 return snd_pcm_xrun(substream);
2595 case SNDRV_PCM_IOCTL_HWSYNC:
2596 return snd_pcm_hwsync(substream);
2597 case SNDRV_PCM_IOCTL_DELAY:
2598 return snd_pcm_delay(substream, arg);
2599 case SNDRV_PCM_IOCTL_SYNC_PTR:
2600 return snd_pcm_sync_ptr(substream, arg);
59d48582 2601#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2602 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2603 return snd_pcm_hw_refine_old_user(substream, arg);
2604 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2605 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2606#endif
1da177e4 2607 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 2608 return snd_pcm_drain(substream, file);
1da177e4
LT		 2609 case SNDRV_PCM_IOCTL_DROP:
2610 return snd_pcm_drop(substream);
e661d0dd
TI		 2611 case SNDRV_PCM_IOCTL_PAUSE:
2612 {
2613 int res;
2614 snd_pcm_stream_lock_irq(substream);
2615 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2616 snd_pcm_stream_unlock_irq(substream);
2617 return res;
2618 }
1da177e4
LT		 2619 }
2620 snd_printd("unknown ioctl = 0x%x\n", cmd);
2621 return -ENOTTY;
2622}
2623
0df63e44
TI		 2624static int snd_pcm_playback_ioctl1(struct file *file,
2625 struct snd_pcm_substream *substream,
1da177e4
LT		 2626 unsigned int cmd, void __user *arg)
2627{
7eaa943c
TI		 2628 if (snd_BUG_ON(!substream))
2629 return -ENXIO;
2630 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2631 return -EINVAL;
1da177e4
LT		 2632 switch (cmd) {
2633 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2634 {
877211f5
TI		 2635 struct snd_xferi xferi;
2636 struct snd_xferi __user *_xferi = arg;
2637 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2638 snd_pcm_sframes_t result;
2639 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2640 return -EBADFD;
2641 if (put_user(0, &_xferi->result))
2642 return -EFAULT;
2643 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2644 return -EFAULT;
2645 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2646 __put_user(result, &_xferi->result);
2647 return result < 0 ? result : 0;
2648 }
2649 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2650 {
877211f5
TI		 2651 struct snd_xfern xfern;
2652 struct snd_xfern __user *_xfern = arg;
2653 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2654 void __user **bufs;
2655 snd_pcm_sframes_t result;
2656 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2657 return -EBADFD;
2658 if (runtime->channels > 128)
2659 return -EINVAL;
2660 if (put_user(0, &_xfern->result))
2661 return -EFAULT;
2662 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2663 return -EFAULT;
ef44a1ec
LZ		 2664
2665 bufs = memdup_user(xfern.bufs,
2666 sizeof(void *) * runtime->channels);
2667 if (IS_ERR(bufs))
2668 return PTR_ERR(bufs);
1da177e4
LT		 2669 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2670 kfree(bufs);
2671 __put_user(result, &_xfern->result);
2672 return result < 0 ? result : 0;
2673 }
2674 case SNDRV_PCM_IOCTL_REWIND:
2675 {
2676 snd_pcm_uframes_t frames;
2677 snd_pcm_uframes_t __user *_frames = arg;
2678 snd_pcm_sframes_t result;
2679 if (get_user(frames, _frames))
2680 return -EFAULT;
2681 if (put_user(0, _frames))
2682 return -EFAULT;
2683 result = snd_pcm_playback_rewind(substream, frames);
2684 __put_user(result, _frames);
2685 return result < 0 ? result : 0;
2686 }
2687 case SNDRV_PCM_IOCTL_FORWARD:
2688 {
2689 snd_pcm_uframes_t frames;
2690 snd_pcm_uframes_t __user *_frames = arg;
2691 snd_pcm_sframes_t result;
2692 if (get_user(frames, _frames))
2693 return -EFAULT;
2694 if (put_user(0, _frames))
2695 return -EFAULT;
2696 result = snd_pcm_playback_forward(substream, frames);
2697 __put_user(result, _frames);
2698 return result < 0 ? result : 0;
2699 }
1da177e4 2700 }
0df63e44 2701 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2702}
2703
0df63e44
TI		 2704static int snd_pcm_capture_ioctl1(struct file *file,
2705 struct snd_pcm_substream *substream,
1da177e4
LT		 2706 unsigned int cmd, void __user *arg)
2707{
7eaa943c
TI		 2708 if (snd_BUG_ON(!substream))
2709 return -ENXIO;
2710 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2711 return -EINVAL;
1da177e4
LT		 2712 switch (cmd) {
2713 case SNDRV_PCM_IOCTL_READI_FRAMES:
2714 {
877211f5
TI		 2715 struct snd_xferi xferi;
2716 struct snd_xferi __user *_xferi = arg;
2717 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2718 snd_pcm_sframes_t result;
2719 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2720 return -EBADFD;
2721 if (put_user(0, &_xferi->result))
2722 return -EFAULT;
2723 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2724 return -EFAULT;
2725 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2726 __put_user(result, &_xferi->result);
2727 return result < 0 ? result : 0;
2728 }
2729 case SNDRV_PCM_IOCTL_READN_FRAMES:
2730 {
877211f5
TI		 2731 struct snd_xfern xfern;
2732 struct snd_xfern __user *_xfern = arg;
2733 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2734 void *bufs;
2735 snd_pcm_sframes_t result;
2736 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2737 return -EBADFD;
2738 if (runtime->channels > 128)
2739 return -EINVAL;
2740 if (put_user(0, &_xfern->result))
2741 return -EFAULT;
2742 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2743 return -EFAULT;
ef44a1ec
LZ		 2744
2745 bufs = memdup_user(xfern.bufs,
2746 sizeof(void *) * runtime->channels);
2747 if (IS_ERR(bufs))
2748 return PTR_ERR(bufs);
1da177e4
LT		 2749 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2750 kfree(bufs);
2751 __put_user(result, &_xfern->result);
2752 return result < 0 ? result : 0;
2753 }
2754 case SNDRV_PCM_IOCTL_REWIND:
2755 {
2756 snd_pcm_uframes_t frames;
2757 snd_pcm_uframes_t __user *_frames = arg;
2758 snd_pcm_sframes_t result;
2759 if (get_user(frames, _frames))
2760 return -EFAULT;
2761 if (put_user(0, _frames))
2762 return -EFAULT;
2763 result = snd_pcm_capture_rewind(substream, frames);
2764 __put_user(result, _frames);
2765 return result < 0 ? result : 0;
2766 }
2767 case SNDRV_PCM_IOCTL_FORWARD:
2768 {
2769 snd_pcm_uframes_t frames;
2770 snd_pcm_uframes_t __user *_frames = arg;
2771 snd_pcm_sframes_t result;
2772 if (get_user(frames, _frames))
2773 return -EFAULT;
2774 if (put_user(0, _frames))
2775 return -EFAULT;
2776 result = snd_pcm_capture_forward(substream, frames);
2777 __put_user(result, _frames);
2778 return result < 0 ? result : 0;
2779 }
2780 }
0df63e44 2781 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2782}
2783
877211f5
TI		 2784static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2785 unsigned long arg)
1da177e4 2786{
877211f5 2787 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2788
2789 pcm_file = file->private_data;
2790
2791 if (((cmd >> 8) & 0xff) != 'A')
2792 return -ENOTTY;
2793
0df63e44
TI		 2794 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2795 (void __user *)arg);
1da177e4
LT		 2796}
2797
877211f5
TI		 2798static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2799 unsigned long arg)
1da177e4 2800{
877211f5 2801 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2802
2803 pcm_file = file->private_data;
2804
2805 if (((cmd >> 8) & 0xff) != 'A')
2806 return -ENOTTY;
2807
0df63e44
TI		 2808 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2809 (void __user *)arg);
1da177e4
LT		 2810}
2811
bf1bbb5a
TI		 2812int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2813 unsigned int cmd, void *arg)
1da177e4
LT		 2814{
2815 mm_segment_t fs;
2816 int result;
2817
2818 fs = snd_enter_user();
1da177e4
LT		 2819 switch (substream->stream) {
2820 case SNDRV_PCM_STREAM_PLAYBACK:
0df63e44
TI		 2821 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2822 (void __user *)arg);
bf1bbb5a 2823 break;
1da177e4 2824 case SNDRV_PCM_STREAM_CAPTURE:
0df63e44
TI		 2825 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2826 (void __user *)arg);
bf1bbb5a 2827 break;
1da177e4 2828 default:
bf1bbb5a
TI		 2829 result = -EINVAL;
2830 break;
1da177e4 2831 }
bf1bbb5a
TI		 2832 snd_leave_user(fs);
2833 return result;
1da177e4
LT		 2834}
2835
e88e8ae6
TI		 2836EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2837
877211f5
TI		 2838static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2839 loff_t * offset)
1da177e4 2840{
877211f5
TI		 2841 struct snd_pcm_file *pcm_file;
2842 struct snd_pcm_substream *substream;
2843 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2844 snd_pcm_sframes_t result;
2845
2846 pcm_file = file->private_data;
2847 substream = pcm_file->substream;
7eaa943c
TI		 2848 if (PCM_RUNTIME_CHECK(substream))
2849 return -ENXIO;
1da177e4
LT		 2850 runtime = substream->runtime;
2851 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2852 return -EBADFD;
2853 if (!frame_aligned(runtime, count))
2854 return -EINVAL;
2855 count = bytes_to_frames(runtime, count);
2856 result = snd_pcm_lib_read(substream, buf, count);
2857 if (result > 0)
2858 result = frames_to_bytes(runtime, result);
2859 return result;
2860}
2861
877211f5
TI		 2862static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2863 size_t count, loff_t * offset)
1da177e4 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
2870 pcm_file = file->private_data;
2871 substream = pcm_file->substream;
7eaa943c
TI		 2872 if (PCM_RUNTIME_CHECK(substream))
2873 return -ENXIO;
1da177e4 2874 runtime = substream->runtime;
7eaa943c
TI		 2875 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2876 return -EBADFD;
2877 if (!frame_aligned(runtime, count))
2878 return -EINVAL;
1da177e4
LT		 2879 count = bytes_to_frames(runtime, count);
2880 result = snd_pcm_lib_write(substream, buf, count);
2881 if (result > 0)
2882 result = frames_to_bytes(runtime, result);
1da177e4
LT		 2883 return result;
2884}
2885
ee0b3e67
BP		 2886static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2887 unsigned long nr_segs, loff_t pos)
1da177e4
LT		 2888
2889{
877211f5
TI		 2890 struct snd_pcm_file *pcm_file;
2891 struct snd_pcm_substream *substream;
2892 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2893 snd_pcm_sframes_t result;
2894 unsigned long i;
2895 void __user **bufs;
2896 snd_pcm_uframes_t frames;
2897
ee0b3e67 2898 pcm_file = iocb->ki_filp->private_data;
1da177e4 2899 substream = pcm_file->substream;
7eaa943c
TI		 2900 if (PCM_RUNTIME_CHECK(substream))
2901 return -ENXIO;
1da177e4
LT		 2902 runtime = substream->runtime;
2903 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2904 return -EBADFD;
ee0b3e67 2905 if (nr_segs > 1024 || nr_segs != runtime->channels)
1da177e4 2906 return -EINVAL;
ee0b3e67 2907 if (!frame_aligned(runtime, iov->iov_len))
1da177e4 2908 return -EINVAL;
ee0b3e67
BP		 2909 frames = bytes_to_samples(runtime, iov->iov_len);
2910 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2911 if (bufs == NULL)
2912 return -ENOMEM;
ee0b3e67
BP		 2913 for (i = 0; i < nr_segs; ++i)
2914 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2915 result = snd_pcm_lib_readv(substream, bufs, frames);
2916 if (result > 0)
2917 result = frames_to_bytes(runtime, result);
2918 kfree(bufs);
2919 return result;
2920}
2921
ee0b3e67
BP		 2922static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2923 unsigned long nr_segs, loff_t pos)
1da177e4 2924{
877211f5
TI		 2925 struct snd_pcm_file *pcm_file;
2926 struct snd_pcm_substream *substream;
2927 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2928 snd_pcm_sframes_t result;
2929 unsigned long i;
2930 void __user **bufs;
2931 snd_pcm_uframes_t frames;
2932
ee0b3e67 2933 pcm_file = iocb->ki_filp->private_data;
1da177e4 2934 substream = pcm_file->substream;
7eaa943c
TI		 2935 if (PCM_RUNTIME_CHECK(substream))
2936 return -ENXIO;
1da177e4 2937 runtime = substream->runtime;
7eaa943c
TI		 2938 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2939 return -EBADFD;
ee0b3e67 2940 if (nr_segs > 128 || nr_segs != runtime->channels ||
7eaa943c
TI		 2941 !frame_aligned(runtime, iov->iov_len))
2942 return -EINVAL;
ee0b3e67
BP		 2943 frames = bytes_to_samples(runtime, iov->iov_len);
2944 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2945 if (bufs == NULL)
2946 return -ENOMEM;
ee0b3e67
BP		 2947 for (i = 0; i < nr_segs; ++i)
2948 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2949 result = snd_pcm_lib_writev(substream, bufs, frames);
2950 if (result > 0)
2951 result = frames_to_bytes(runtime, result);
2952 kfree(bufs);
1da177e4
LT		 2953 return result;
2954}
2955
2956static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2957{
877211f5
TI		 2958 struct snd_pcm_file *pcm_file;
2959 struct snd_pcm_substream *substream;
2960 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2961 unsigned int mask;
2962 snd_pcm_uframes_t avail;
2963
2964 pcm_file = file->private_data;
2965
2966 substream = pcm_file->substream;
7eaa943c
TI		 2967 if (PCM_RUNTIME_CHECK(substream))
2968 return -ENXIO;
1da177e4
LT		 2969 runtime = substream->runtime;
2970
2971 poll_wait(file, &runtime->sleep, wait);
2972
2973 snd_pcm_stream_lock_irq(substream);
2974 avail = snd_pcm_playback_avail(runtime);
2975 switch (runtime->status->state) {
2976 case SNDRV_PCM_STATE_RUNNING:
2977 case SNDRV_PCM_STATE_PREPARED:
2978 case SNDRV_PCM_STATE_PAUSED:
2979 if (avail >= runtime->control->avail_min) {
2980 mask = POLLOUT | POLLWRNORM;
2981 break;
2982 }
2983 /* Fall through */
2984 case SNDRV_PCM_STATE_DRAINING:
2985 mask = 0;
2986 break;
2987 default:
2988 mask = POLLOUT | POLLWRNORM | POLLERR;
2989 break;
2990 }
2991 snd_pcm_stream_unlock_irq(substream);
2992 return mask;
2993}
2994
2995static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2996{
877211f5
TI		 2997 struct snd_pcm_file *pcm_file;
2998 struct snd_pcm_substream *substream;
2999 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3000 unsigned int mask;
3001 snd_pcm_uframes_t avail;
3002
3003 pcm_file = file->private_data;
3004
3005 substream = pcm_file->substream;
7eaa943c
TI		 3006 if (PCM_RUNTIME_CHECK(substream))
3007 return -ENXIO;
1da177e4
LT		 3008 runtime = substream->runtime;
3009
3010 poll_wait(file, &runtime->sleep, wait);
3011
3012 snd_pcm_stream_lock_irq(substream);
3013 avail = snd_pcm_capture_avail(runtime);
3014 switch (runtime->status->state) {
3015 case SNDRV_PCM_STATE_RUNNING:
3016 case SNDRV_PCM_STATE_PREPARED:
3017 case SNDRV_PCM_STATE_PAUSED:
3018 if (avail >= runtime->control->avail_min) {
3019 mask = POLLIN | POLLRDNORM;
3020 break;
3021 }
3022 mask = 0;
3023 break;
3024 case SNDRV_PCM_STATE_DRAINING:
3025 if (avail > 0) {
3026 mask = POLLIN | POLLRDNORM;
3027 break;
3028 }
3029 /* Fall through */
3030 default:
3031 mask = POLLIN | POLLRDNORM | POLLERR;
3032 break;
3033 }
3034 snd_pcm_stream_unlock_irq(substream);
3035 return mask;
3036}
3037
3038/*
3039 * mmap support
3040 */
3041
3042/*
3043 * Only on coherent architectures, we can mmap the status and the control records
3044 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3045 */
3046#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3047/*
3048 * mmap status record
3049 */
3ad5afcd
NP		 3050static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3051 struct vm_fault *vmf)
1da177e4 3052{
877211f5
TI		 3053 struct snd_pcm_substream *substream = area->vm_private_data;
3054 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3055
3056 if (substream == NULL)
3ad5afcd 3057 return VM_FAULT_SIGBUS;
1da177e4 3058 runtime = substream->runtime;
3ad5afcd
NP		 3059 vmf->page = virt_to_page(runtime->status);
3060 get_page(vmf->page);
3061 return 0;
1da177e4
LT		 3062}
3063
f0f37e2f 3064static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 3065{
3ad5afcd 3066 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3067};
3068
877211f5 3069static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3070 struct vm_area_struct *area)
3071{
1da177e4
LT		 3072 long size;
3073 if (!(area->vm_flags & VM_READ))
3074 return -EINVAL;
1da177e4 3075 size = area->vm_end - area->vm_start;
877211f5 3076 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3077 return -EINVAL;
3078 area->vm_ops = &snd_pcm_vm_ops_status;
3079 area->vm_private_data = substream;
314e51b9 3080 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3081 return 0;
3082}
3083
3084/*
3085 * mmap control record
3086 */
3ad5afcd
NP		 3087static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3088 struct vm_fault *vmf)
1da177e4 3089{
877211f5
TI		 3090 struct snd_pcm_substream *substream = area->vm_private_data;
3091 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3092
3093 if (substream == NULL)
3ad5afcd 3094 return VM_FAULT_SIGBUS;
1da177e4 3095 runtime = substream->runtime;
3ad5afcd
NP		 3096 vmf->page = virt_to_page(runtime->control);
3097 get_page(vmf->page);
3098 return 0;
1da177e4
LT		 3099}
3100
f0f37e2f 3101static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3102{
3ad5afcd 3103 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3104};
3105
877211f5 3106static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3107 struct vm_area_struct *area)
3108{
1da177e4
LT		 3109 long size;
3110 if (!(area->vm_flags & VM_READ))
3111 return -EINVAL;
1da177e4 3112 size = area->vm_end - area->vm_start;
877211f5 3113 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3114 return -EINVAL;
3115 area->vm_ops = &snd_pcm_vm_ops_control;
3116 area->vm_private_data = substream;
314e51b9 3117 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3118 return 0;
3119}
3120#else /* ! coherent mmap */
3121/*
3122 * don't support mmap for status and control records.
3123 */
877211f5 3124static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3125 struct vm_area_struct *area)
3126{
3127 return -ENXIO;
3128}
877211f5 3129static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3130 struct vm_area_struct *area)
3131{
3132 return -ENXIO;
3133}
3134#endif /* coherent mmap */
3135
9eb4a067
TI		 3136static inline struct page *
3137snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3138{
3139 void *vaddr = substream->runtime->dma_area + ofs;
66b6cfac
TI		 3140#if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3141 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3142 return virt_to_page(CAC_ADDR(vaddr));
6985c887
TI		 3143#endif
3144#if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3145 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3146 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3147 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3148 /* assume dma_handle set via pfn_to_phys() in
3149 * mm/dma-noncoherent.c
3150 */
3151 return pfn_to_page(addr >> PAGE_SHIFT);
3152 }
66b6cfac 3153#endif
9eb4a067
TI		 3154 return virt_to_page(vaddr);
3155}
3156
1da177e4 3157/*
3ad5afcd 3158 * fault callback for mmapping a RAM page
1da177e4 3159 */
3ad5afcd
NP		 3160static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3161 struct vm_fault *vmf)
1da177e4 3162{
877211f5
TI		 3163 struct snd_pcm_substream *substream = area->vm_private_data;
3164 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3165 unsigned long offset;
3166 struct page * page;
1da177e4
LT		 3167 size_t dma_bytes;
3168
3169 if (substream == NULL)
3ad5afcd 3170 return VM_FAULT_SIGBUS;
1da177e4 3171 runtime = substream->runtime;
3ad5afcd 3172 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3173 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3174 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3175 return VM_FAULT_SIGBUS;
9eb4a067 3176 if (substream->ops->page)
1da177e4 3177 page = substream->ops->page(substream, offset);
9eb4a067
TI		 3178 else
3179 page = snd_pcm_default_page_ops(substream, offset);
3180 if (!page)
3181 return VM_FAULT_SIGBUS;
b5810039 3182 get_page(page);
3ad5afcd
NP		 3183 vmf->page = page;
3184 return 0;
1da177e4
LT		 3185}
3186
657b1989
TI		 3187static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3188 .open = snd_pcm_mmap_data_open,
3189 .close = snd_pcm_mmap_data_close,
3190};
3191
3192static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3193 .open = snd_pcm_mmap_data_open,
3194 .close = snd_pcm_mmap_data_close,
3ad5afcd 3195 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3196};
3197
657b1989
TI		 3198#ifndef ARCH_HAS_DMA_MMAP_COHERENT
3199/* This should be defined / handled globally! */
3200#ifdef CONFIG_ARM
3201#define ARCH_HAS_DMA_MMAP_COHERENT
3202#endif
3203#endif
3204
1da177e4
LT		 3205/*
3206 * mmap the DMA buffer on RAM
3207 */
18a2b962
TI		 3208int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3209 struct vm_area_struct *area)
1da177e4 3210{
314e51b9 3211 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
657b1989
TI		 3212#ifdef ARCH_HAS_DMA_MMAP_COHERENT
3213 if (!substream->ops->page &&
3214 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3215 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3216 area,
3217 substream->runtime->dma_area,
3218 substream->runtime->dma_addr,
3219 area->vm_end - area->vm_start);
9fe17b5d
TI		 3220#elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3221 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3222 !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3223 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
657b1989
TI		 3224#endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3225 /* mmap with fault handler */
3226 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3227 return 0;
3228}
18a2b962 3229EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
1da177e4
LT		 3230
3231/*
3232 * mmap the DMA buffer on I/O memory area
3233 */
3234#if SNDRV_PCM_INFO_MMAP_IOMEM
877211f5
TI		 3235int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3236 struct vm_area_struct *area)
1da177e4 3237{
0fe09a45 3238 struct snd_pcm_runtime *runtime = substream->runtime;;
1da177e4 3239
1da177e4 3240 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
0fe09a45 3241 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
1da177e4 3242}
e88e8ae6
TI		 3243
3244EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3245#endif /* SNDRV_PCM_INFO_MMAP */
3246
3247/*
3248 * mmap DMA buffer
3249 */
877211f5 3250int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3251 struct vm_area_struct *area)
3252{
877211f5 3253 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3254 long size;
3255 unsigned long offset;
3256 size_t dma_bytes;
657b1989 3257 int err;
1da177e4
LT		 3258
3259 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3260 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3261 return -EINVAL;
3262 } else {
3263 if (!(area->vm_flags & VM_READ))
3264 return -EINVAL;
3265 }
3266 runtime = substream->runtime;
1da177e4
LT		 3267 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3268 return -EBADFD;
3269 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3270 return -ENXIO;
3271 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3272 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3273 return -EINVAL;
3274 size = area->vm_end - area->vm_start;
3275 offset = area->vm_pgoff << PAGE_SHIFT;
3276 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3277 if ((size_t)size > dma_bytes)
3278 return -EINVAL;
3279 if (offset > dma_bytes - size)
3280 return -EINVAL;
3281
657b1989
TI		 3282 area->vm_ops = &snd_pcm_vm_ops_data;
3283 area->vm_private_data = substream;
1da177e4 3284 if (substream->ops->mmap)
657b1989 3285 err = substream->ops->mmap(substream, area);
1da177e4 3286 else
18a2b962 3287 err = snd_pcm_lib_default_mmap(substream, area);
657b1989
TI		 3288 if (!err)
3289 atomic_inc(&substream->mmap_count);
3290 return err;
1da177e4
LT		 3291}
3292
e88e8ae6
TI		 3293EXPORT_SYMBOL(snd_pcm_mmap_data);
3294
1da177e4
LT		 3295static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3296{
877211f5
TI		 3297 struct snd_pcm_file * pcm_file;
3298 struct snd_pcm_substream *substream;
1da177e4
LT		 3299 unsigned long offset;
3300
3301 pcm_file = file->private_data;
3302 substream = pcm_file->substream;
7eaa943c
TI		 3303 if (PCM_RUNTIME_CHECK(substream))
3304 return -ENXIO;
1da177e4
LT		 3305
3306 offset = area->vm_pgoff << PAGE_SHIFT;
3307 switch (offset) {
3308 case SNDRV_PCM_MMAP_OFFSET_STATUS:
548a648b 3309 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3310 return -ENXIO;
3311 return snd_pcm_mmap_status(substream, file, area);
3312 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
548a648b 3313 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3314 return -ENXIO;
3315 return snd_pcm_mmap_control(substream, file, area);
3316 default:
3317 return snd_pcm_mmap_data(substream, file, area);
3318 }
3319 return 0;
3320}
3321
3322static int snd_pcm_fasync(int fd, struct file * file, int on)
3323{
877211f5
TI		 3324 struct snd_pcm_file * pcm_file;
3325 struct snd_pcm_substream *substream;
3326 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3327
3328 pcm_file = file->private_data;
3329 substream = pcm_file->substream;
7eaa943c 3330 if (PCM_RUNTIME_CHECK(substream))
d05468b7 3331 return -ENXIO;
1da177e4 3332 runtime = substream->runtime;
d05468b7 3333 return fasync_helper(fd, file, on, &runtime->fasync);
1da177e4
LT		 3334}
3335
3336/*
3337 * ioctl32 compat
3338 */
3339#ifdef CONFIG_COMPAT
3340#include "pcm_compat.c"
3341#else
3342#define snd_pcm_ioctl_compat NULL
3343#endif
3344
3345/*
3346 * To be removed helpers to keep binary compatibility
3347 */
3348
59d48582 3349#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3350#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3351#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3352
877211f5
TI		 3353static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3354 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3355{
3356 unsigned int i;
3357
3358 memset(params, 0, sizeof(*params));
3359 params->flags = oparams->flags;
3360 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3361 params->masks[i].bits[0] = oparams->masks[i];
3362 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3363 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3364 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3365 params->info = oparams->info;
3366 params->msbits = oparams->msbits;
3367 params->rate_num = oparams->rate_num;
3368 params->rate_den = oparams->rate_den;
3369 params->fifo_size = oparams->fifo_size;
3370}
3371
877211f5
TI		 3372static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3373 struct snd_pcm_hw_params *params)
1da177e4
LT		 3374{
3375 unsigned int i;
3376
3377 memset(oparams, 0, sizeof(*oparams));
3378 oparams->flags = params->flags;
3379 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3380 oparams->masks[i] = params->masks[i].bits[0];
3381 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3382 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3383 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3384 oparams->info = params->info;
3385 oparams->msbits = params->msbits;
3386 oparams->rate_num = params->rate_num;
3387 oparams->rate_den = params->rate_den;
3388 oparams->fifo_size = params->fifo_size;
3389}
3390
877211f5
TI		 3391static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3392 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3393{
877211f5
TI		 3394 struct snd_pcm_hw_params *params;
3395 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3396 int err;
3397
3398 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3399 if (!params)
3400 return -ENOMEM;
1da177e4 3401
ef44a1ec
LZ		 3402 oparams = memdup_user(_oparams, sizeof(*oparams));
3403 if (IS_ERR(oparams)) {
3404 err = PTR_ERR(oparams);
1da177e4
LT		 3405 goto out;
3406 }
3407 snd_pcm_hw_convert_from_old_params(params, oparams);
3408 err = snd_pcm_hw_refine(substream, params);
3409 snd_pcm_hw_convert_to_old_params(oparams, params);
3410 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3411 if (!err)
3412 err = -EFAULT;
3413 }
ef44a1ec
LZ		 3414
3415 kfree(oparams);
1da177e4
LT		 3416out:
3417 kfree(params);
1da177e4
LT		 3418 return err;
3419}
3420
877211f5
TI		 3421static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3422 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3423{
877211f5
TI		 3424 struct snd_pcm_hw_params *params;
3425 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3426 int err;
3427
3428 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3429 if (!params)
3430 return -ENOMEM;
3431
3432 oparams = memdup_user(_oparams, sizeof(*oparams));
3433 if (IS_ERR(oparams)) {
3434 err = PTR_ERR(oparams);
1da177e4
LT		 3435 goto out;
3436 }
3437 snd_pcm_hw_convert_from_old_params(params, oparams);
3438 err = snd_pcm_hw_params(substream, params);
3439 snd_pcm_hw_convert_to_old_params(oparams, params);
3440 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3441 if (!err)
3442 err = -EFAULT;
3443 }
ef44a1ec
LZ		 3444
3445 kfree(oparams);
1da177e4
LT		 3446out:
3447 kfree(params);
1da177e4
LT		 3448 return err;
3449}
59d48582 3450#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 3451
7003609b 3452#ifndef CONFIG_MMU
55c63bd2
DG		 3453static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3454 unsigned long addr,
3455 unsigned long len,
3456 unsigned long pgoff,
3457 unsigned long flags)
3458{
3459 struct snd_pcm_file *pcm_file = file->private_data;
3460 struct snd_pcm_substream *substream = pcm_file->substream;
3461 struct snd_pcm_runtime *runtime = substream->runtime;
3462 unsigned long offset = pgoff << PAGE_SHIFT;
3463
3464 switch (offset) {
3465 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3466 return (unsigned long)runtime->status;
3467 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3468 return (unsigned long)runtime->control;
3469 default:
3470 return (unsigned long)runtime->dma_area + offset;
3471 }
7003609b
CC		 3472}
3473#else
55c63bd2 3474# define snd_pcm_get_unmapped_area NULL
7003609b
CC		 3475#endif
3476
1da177e4
LT		 3477/*
3478 * Register section
3479 */
3480
9c2e08c5 3481const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3482 {
2af677fc
CL		 3483 .owner = THIS_MODULE,
3484 .write = snd_pcm_write,
ee0b3e67 3485 .aio_write = snd_pcm_aio_write,
f87135f5 3486 .open = snd_pcm_playback_open,
2af677fc 3487 .release = snd_pcm_release,
02f4865f 3488 .llseek = no_llseek,
2af677fc
CL		 3489 .poll = snd_pcm_playback_poll,
3490 .unlocked_ioctl = snd_pcm_playback_ioctl,
3491 .compat_ioctl = snd_pcm_ioctl_compat,
3492 .mmap = snd_pcm_mmap,
3493 .fasync = snd_pcm_fasync,
55c63bd2 3494 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3495 },
3496 {
2af677fc
CL		 3497 .owner = THIS_MODULE,
3498 .read = snd_pcm_read,
ee0b3e67 3499 .aio_read = snd_pcm_aio_read,
f87135f5 3500 .open = snd_pcm_capture_open,
2af677fc 3501 .release = snd_pcm_release,
02f4865f 3502 .llseek = no_llseek,
2af677fc
CL		 3503 .poll = snd_pcm_capture_poll,
3504 .unlocked_ioctl = snd_pcm_capture_ioctl,
3505 .compat_ioctl = snd_pcm_ioctl_compat,
3506 .mmap = snd_pcm_mmap,
3507 .fasync = snd_pcm_fasync,
55c63bd2 3508 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3509 }
3510};
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