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ALSA: hda - Add new codec ALC668 and ALC900 (default name ALC1150)
[linux.git] / sound / core / pcm_native.c
CommitLineData
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>
1da177e4 28#include <linux/uio.h>
657b1989 29#include <linux/dma-mapping.h>
1da177e4
LT		 30#include <sound/core.h>
31#include <sound/control.h>
32#include <sound/info.h>
33#include <sound/pcm.h>
34#include <sound/pcm_params.h>
35#include <sound/timer.h>
36#include <sound/minors.h>
37#include <asm/io.h>
9fe17b5d
TI		 38#if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
39#include <dma-coherence.h>
40#endif
1da177e4
LT		 41
42/*
43 * Compatibility
44 */
45
877211f5 46struct snd_pcm_hw_params_old {
1da177e4
LT		 47 unsigned int flags;
48 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
49 SNDRV_PCM_HW_PARAM_ACCESS + 1];
877211f5 50 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
1da177e4
LT		 51 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
52 unsigned int rmask;
53 unsigned int cmask;
54 unsigned int info;
55 unsigned int msbits;
56 unsigned int rate_num;
57 unsigned int rate_den;
877211f5 58 snd_pcm_uframes_t fifo_size;
1da177e4
LT		 59 unsigned char reserved[64];
60};
61
59d48582 62#ifdef CONFIG_SND_SUPPORT_OLD_API
877211f5
TI		 63#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
64#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
1da177e4 65
877211f5
TI		 66static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
67 struct snd_pcm_hw_params_old __user * _oparams);
68static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
69 struct snd_pcm_hw_params_old __user * _oparams);
59d48582 70#endif
f87135f5 71static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
1da177e4
LT		 72
73/*
74 *
75 */
76
77DEFINE_RWLOCK(snd_pcm_link_rwlock);
e88e8ae6 78EXPORT_SYMBOL(snd_pcm_link_rwlock);
1da177e4 79
e88e8ae6 80static DECLARE_RWSEM(snd_pcm_link_rwsem);
1da177e4
LT		 81
82static inline mm_segment_t snd_enter_user(void)
83{
84 mm_segment_t fs = get_fs();
85 set_fs(get_ds());
86 return fs;
87}
88
89static inline void snd_leave_user(mm_segment_t fs)
90{
91 set_fs(fs);
92}
93
94
95
877211f5 96int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 97{
877211f5
TI		 98 struct snd_pcm_runtime *runtime;
99 struct snd_pcm *pcm = substream->pcm;
100 struct snd_pcm_str *pstr = substream->pstr;
1da177e4 101
1da177e4
LT		 102 memset(info, 0, sizeof(*info));
103 info->card = pcm->card->number;
104 info->device = pcm->device;
105 info->stream = substream->stream;
106 info->subdevice = substream->number;
107 strlcpy(info->id, pcm->id, sizeof(info->id));
108 strlcpy(info->name, pcm->name, sizeof(info->name));
109 info->dev_class = pcm->dev_class;
110 info->dev_subclass = pcm->dev_subclass;
111 info->subdevices_count = pstr->substream_count;
112 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
113 strlcpy(info->subname, substream->name, sizeof(info->subname));
114 runtime = substream->runtime;
115 /* AB: FIXME!!! This is definitely nonsense */
116 if (runtime) {
117 info->sync = runtime->sync;
118 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
119 }
120 return 0;
121}
122
877211f5
TI		 123int snd_pcm_info_user(struct snd_pcm_substream *substream,
124 struct snd_pcm_info __user * _info)
1da177e4 125{
877211f5 126 struct snd_pcm_info *info;
1da177e4
LT		 127 int err;
128
129 info = kmalloc(sizeof(*info), GFP_KERNEL);
130 if (! info)
131 return -ENOMEM;
132 err = snd_pcm_info(substream, info);
133 if (err >= 0) {
134 if (copy_to_user(_info, info, sizeof(*info)))
135 err = -EFAULT;
136 }
137 kfree(info);
138 return err;
139}
140
141#undef RULES_DEBUG
142
143#ifdef RULES_DEBUG
144#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
47023ec7 145static const char * const snd_pcm_hw_param_names[] = {
1da177e4
LT		 146 HW_PARAM(ACCESS),
147 HW_PARAM(FORMAT),
148 HW_PARAM(SUBFORMAT),
149 HW_PARAM(SAMPLE_BITS),
150 HW_PARAM(FRAME_BITS),
151 HW_PARAM(CHANNELS),
152 HW_PARAM(RATE),
153 HW_PARAM(PERIOD_TIME),
154 HW_PARAM(PERIOD_SIZE),
155 HW_PARAM(PERIOD_BYTES),
156 HW_PARAM(PERIODS),
157 HW_PARAM(BUFFER_TIME),
158 HW_PARAM(BUFFER_SIZE),
159 HW_PARAM(BUFFER_BYTES),
160 HW_PARAM(TICK_TIME),
161};
162#endif
163
877211f5
TI		 164int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
165 struct snd_pcm_hw_params *params)
1da177e4
LT		 166{
167 unsigned int k;
877211f5
TI		 168 struct snd_pcm_hardware *hw;
169 struct snd_interval *i = NULL;
170 struct snd_mask *m = NULL;
171 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
1da177e4
LT		 172 unsigned int rstamps[constrs->rules_num];
173 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
174 unsigned int stamp = 2;
175 int changed, again;
176
177 params->info = 0;
178 params->fifo_size = 0;
179 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
180 params->msbits = 0;
181 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
182 params->rate_num = 0;
183 params->rate_den = 0;
184 }
185
186 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
187 m = hw_param_mask(params, k);
188 if (snd_mask_empty(m))
189 return -EINVAL;
190 if (!(params->rmask & (1 << k)))
191 continue;
192#ifdef RULES_DEBUG
006de267 193 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
1da177e4
LT		 194 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
195#endif
196 changed = snd_mask_refine(m, constrs_mask(constrs, k));
197#ifdef RULES_DEBUG
198 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
199#endif
200 if (changed)
201 params->cmask |= 1 << k;
202 if (changed < 0)
203 return changed;
204 }
205
206 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
207 i = hw_param_interval(params, k);
208 if (snd_interval_empty(i))
209 return -EINVAL;
210 if (!(params->rmask & (1 << k)))
211 continue;
212#ifdef RULES_DEBUG
006de267 213 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
1da177e4
LT		 214 if (i->empty)
215 printk("empty");
216 else
217 printk("%c%u %u%c",
218 i->openmin ? '(' : '[', i->min,
219 i->max, i->openmax ? ')' : ']');
220 printk(" -> ");
221#endif
222 changed = snd_interval_refine(i, constrs_interval(constrs, k));
223#ifdef RULES_DEBUG
224 if (i->empty)
225 printk("empty\n");
226 else
227 printk("%c%u %u%c\n",
228 i->openmin ? '(' : '[', i->min,
229 i->max, i->openmax ? ')' : ']');
230#endif
231 if (changed)
232 params->cmask |= 1 << k;
233 if (changed < 0)
234 return changed;
235 }
236
237 for (k = 0; k < constrs->rules_num; k++)
238 rstamps[k] = 0;
239 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
240 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
241 do {
242 again = 0;
243 for (k = 0; k < constrs->rules_num; k++) {
877211f5 244 struct snd_pcm_hw_rule *r = &constrs->rules[k];
1da177e4
LT		 245 unsigned int d;
246 int doit = 0;
247 if (r->cond && !(r->cond & params->flags))
248 continue;
249 for (d = 0; r->deps[d] >= 0; d++) {
250 if (vstamps[r->deps[d]] > rstamps[k]) {
251 doit = 1;
252 break;
253 }
254 }
255 if (!doit)
256 continue;
257#ifdef RULES_DEBUG
006de267 258 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
1da177e4
LT		 259 if (r->var >= 0) {
260 printk("%s = ", snd_pcm_hw_param_names[r->var]);
261 if (hw_is_mask(r->var)) {
262 m = hw_param_mask(params, r->var);
263 printk("%x", *m->bits);
264 } else {
265 i = hw_param_interval(params, r->var);
266 if (i->empty)
267 printk("empty");
268 else
269 printk("%c%u %u%c",
270 i->openmin ? '(' : '[', i->min,
271 i->max, i->openmax ? ')' : ']');
272 }
273 }
274#endif
275 changed = r->func(params, r);
276#ifdef RULES_DEBUG
277 if (r->var >= 0) {
278 printk(" -> ");
279 if (hw_is_mask(r->var))
280 printk("%x", *m->bits);
281 else {
282 if (i->empty)
283 printk("empty");
284 else
285 printk("%c%u %u%c",
286 i->openmin ? '(' : '[', i->min,
287 i->max, i->openmax ? ')' : ']');
288 }
289 }
290 printk("\n");
291#endif
292 rstamps[k] = stamp;
293 if (changed && r->var >= 0) {
294 params->cmask |= (1 << r->var);
295 vstamps[r->var] = stamp;
296 again = 1;
297 }
298 if (changed < 0)
299 return changed;
300 stamp++;
301 }
302 } while (again);
303 if (!params->msbits) {
304 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
305 if (snd_interval_single(i))
306 params->msbits = snd_interval_value(i);
307 }
308
309 if (!params->rate_den) {
310 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
311 if (snd_interval_single(i)) {
312 params->rate_num = snd_interval_value(i);
313 params->rate_den = 1;
314 }
315 }
316
317 hw = &substream->runtime->hw;
318 if (!params->info)
8bea869c
JK		 319 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
320 if (!params->fifo_size) {
3be522a9
JK		 321 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
322 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
323 if (snd_mask_min(m) == snd_mask_max(m) &&
324 snd_interval_min(i) == snd_interval_max(i)) {
8bea869c
JK		 325 changed = substream->ops->ioctl(substream,
326 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
8bd9bca3 327 if (changed < 0)
8bea869c
JK		 328 return changed;
329 }
330 }
1da177e4
LT		 331 params->rmask = 0;
332 return 0;
333}
334
e88e8ae6
TI		 335EXPORT_SYMBOL(snd_pcm_hw_refine);
336
877211f5
TI		 337static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
338 struct snd_pcm_hw_params __user * _params)
1da177e4 339{
877211f5 340 struct snd_pcm_hw_params *params;
1da177e4
LT		 341 int err;
342
ef44a1ec
LZ		 343 params = memdup_user(_params, sizeof(*params));
344 if (IS_ERR(params))
345 return PTR_ERR(params);
346
1da177e4
LT		 347 err = snd_pcm_hw_refine(substream, params);
348 if (copy_to_user(_params, params, sizeof(*params))) {
349 if (!err)
350 err = -EFAULT;
351 }
ef44a1ec 352
1da177e4
LT		 353 kfree(params);
354 return err;
355}
356
9442e691
TI		 357static int period_to_usecs(struct snd_pcm_runtime *runtime)
358{
359 int usecs;
360
361 if (! runtime->rate)
362 return -1; /* invalid */
363
364 /* take 75% of period time as the deadline */
365 usecs = (750000 / runtime->rate) * runtime->period_size;
366 usecs += ((750000 % runtime->rate) * runtime->period_size) /
367 runtime->rate;
368
369 return usecs;
370}
371
9b0573c0
TI		 372static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
373{
374 snd_pcm_stream_lock_irq(substream);
375 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
376 substream->runtime->status->state = state;
377 snd_pcm_stream_unlock_irq(substream);
378}
379
877211f5
TI		 380static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
381 struct snd_pcm_hw_params *params)
1da177e4 382{
877211f5 383 struct snd_pcm_runtime *runtime;
9442e691 384 int err, usecs;
1da177e4
LT		 385 unsigned int bits;
386 snd_pcm_uframes_t frames;
387
7eaa943c
TI		 388 if (PCM_RUNTIME_CHECK(substream))
389 return -ENXIO;
1da177e4 390 runtime = substream->runtime;
1da177e4
LT		 391 snd_pcm_stream_lock_irq(substream);
392 switch (runtime->status->state) {
393 case SNDRV_PCM_STATE_OPEN:
394 case SNDRV_PCM_STATE_SETUP:
395 case SNDRV_PCM_STATE_PREPARED:
396 break;
397 default:
398 snd_pcm_stream_unlock_irq(substream);
399 return -EBADFD;
400 }
401 snd_pcm_stream_unlock_irq(substream);
402#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
403 if (!substream->oss.oss)
404#endif
9c323fcb 405 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 406 return -EBADFD;
407
408 params->rmask = ~0U;
409 err = snd_pcm_hw_refine(substream, params);
410 if (err < 0)
411 goto _error;
412
413 err = snd_pcm_hw_params_choose(substream, params);
414 if (err < 0)
415 goto _error;
416
417 if (substream->ops->hw_params != NULL) {
418 err = substream->ops->hw_params(substream, params);
419 if (err < 0)
420 goto _error;
421 }
422
423 runtime->access = params_access(params);
424 runtime->format = params_format(params);
425 runtime->subformat = params_subformat(params);
426 runtime->channels = params_channels(params);
427 runtime->rate = params_rate(params);
428 runtime->period_size = params_period_size(params);
429 runtime->periods = params_periods(params);
430 runtime->buffer_size = params_buffer_size(params);
1da177e4
LT		 431 runtime->info = params->info;
432 runtime->rate_num = params->rate_num;
433 runtime->rate_den = params->rate_den;
ab69a490
CL		 434 runtime->no_period_wakeup =
435 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
436 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
1da177e4
LT		 437
438 bits = snd_pcm_format_physical_width(runtime->format);
439 runtime->sample_bits = bits;
440 bits *= runtime->channels;
441 runtime->frame_bits = bits;
442 frames = 1;
443 while (bits % 8 != 0) {
444 bits *= 2;
445 frames *= 2;
446 }
447 runtime->byte_align = bits / 8;
448 runtime->min_align = frames;
449
450 /* Default sw params */
451 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
452 runtime->period_step = 1;
1da177e4 453 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 454 runtime->start_threshold = 1;
455 runtime->stop_threshold = runtime->buffer_size;
456 runtime->silence_threshold = 0;
457 runtime->silence_size = 0;
ead4046b
CL		 458 runtime->boundary = runtime->buffer_size;
459 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
460 runtime->boundary *= 2;
1da177e4
LT		 461
462 snd_pcm_timer_resolution_change(substream);
9b0573c0 463 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
9442e691 464
82f68251
JB		 465 if (pm_qos_request_active(&substream->latency_pm_qos_req))
466 pm_qos_remove_request(&substream->latency_pm_qos_req);
9442e691 467 if ((usecs = period_to_usecs(runtime)) >= 0)
82f68251
JB		 468 pm_qos_add_request(&substream->latency_pm_qos_req,
469 PM_QOS_CPU_DMA_LATENCY, usecs);
1da177e4
LT		 470 return 0;
471 _error:
25985edc 472 /* hardware might be unusable from this time,
1da177e4
LT		 473 so we force application to retry to set
474 the correct hardware parameter settings */
9b0573c0 475 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
1da177e4
LT		 476 if (substream->ops->hw_free != NULL)
477 substream->ops->hw_free(substream);
478 return err;
479}
480
877211f5
TI		 481static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
482 struct snd_pcm_hw_params __user * _params)
1da177e4 483{
877211f5 484 struct snd_pcm_hw_params *params;
1da177e4
LT		 485 int err;
486
ef44a1ec
LZ		 487 params = memdup_user(_params, sizeof(*params));
488 if (IS_ERR(params))
489 return PTR_ERR(params);
490
1da177e4
LT		 491 err = snd_pcm_hw_params(substream, params);
492 if (copy_to_user(_params, params, sizeof(*params))) {
493 if (!err)
494 err = -EFAULT;
495 }
ef44a1ec 496
1da177e4
LT		 497 kfree(params);
498 return err;
499}
500
877211f5 501static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 502{
877211f5 503 struct snd_pcm_runtime *runtime;
1da177e4
LT		 504 int result = 0;
505
7eaa943c
TI		 506 if (PCM_RUNTIME_CHECK(substream))
507 return -ENXIO;
1da177e4 508 runtime = substream->runtime;
1da177e4
LT		 509 snd_pcm_stream_lock_irq(substream);
510 switch (runtime->status->state) {
511 case SNDRV_PCM_STATE_SETUP:
512 case SNDRV_PCM_STATE_PREPARED:
513 break;
514 default:
515 snd_pcm_stream_unlock_irq(substream);
516 return -EBADFD;
517 }
518 snd_pcm_stream_unlock_irq(substream);
9c323fcb 519 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 520 return -EBADFD;
521 if (substream->ops->hw_free)
522 result = substream->ops->hw_free(substream);
9b0573c0 523 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
82f68251 524 pm_qos_remove_request(&substream->latency_pm_qos_req);
1da177e4
LT		 525 return result;
526}
527
877211f5
TI		 528static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
529 struct snd_pcm_sw_params *params)
1da177e4 530{
877211f5 531 struct snd_pcm_runtime *runtime;
1250932e 532 int err;
1da177e4 533
7eaa943c
TI		 534 if (PCM_RUNTIME_CHECK(substream))
535 return -ENXIO;
1da177e4 536 runtime = substream->runtime;
1da177e4
LT		 537 snd_pcm_stream_lock_irq(substream);
538 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
539 snd_pcm_stream_unlock_irq(substream);
540 return -EBADFD;
541 }
542 snd_pcm_stream_unlock_irq(substream);
543
544 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
545 return -EINVAL;
546 if (params->avail_min == 0)
547 return -EINVAL;
1da177e4
LT		 548 if (params->silence_size >= runtime->boundary) {
549 if (params->silence_threshold != 0)
550 return -EINVAL;
551 } else {
552 if (params->silence_size > params->silence_threshold)
553 return -EINVAL;
554 if (params->silence_threshold > runtime->buffer_size)
555 return -EINVAL;
556 }
1250932e 557 err = 0;
1da177e4
LT		 558 snd_pcm_stream_lock_irq(substream);
559 runtime->tstamp_mode = params->tstamp_mode;
1da177e4
LT		 560 runtime->period_step = params->period_step;
561 runtime->control->avail_min = params->avail_min;
562 runtime->start_threshold = params->start_threshold;
563 runtime->stop_threshold = params->stop_threshold;
564 runtime->silence_threshold = params->silence_threshold;
565 runtime->silence_size = params->silence_size;
1da177e4
LT		 566 params->boundary = runtime->boundary;
567 if (snd_pcm_running(substream)) {
1da177e4
LT		 568 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
569 runtime->silence_size > 0)
570 snd_pcm_playback_silence(substream, ULONG_MAX);
1250932e 571 err = snd_pcm_update_state(substream, runtime);
1da177e4
LT		 572 }
573 snd_pcm_stream_unlock_irq(substream);
1250932e 574 return err;
1da177e4
LT		 575}
576
877211f5
TI		 577static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
578 struct snd_pcm_sw_params __user * _params)
1da177e4 579{
877211f5 580 struct snd_pcm_sw_params params;
1da177e4
LT		 581 int err;
582 if (copy_from_user(&params, _params, sizeof(params)))
583 return -EFAULT;
584 err = snd_pcm_sw_params(substream, &params);
585 if (copy_to_user(_params, &params, sizeof(params)))
586 return -EFAULT;
587 return err;
588}
589
877211f5
TI		 590int snd_pcm_status(struct snd_pcm_substream *substream,
591 struct snd_pcm_status *status)
1da177e4 592{
877211f5 593 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 594
595 snd_pcm_stream_lock_irq(substream);
596 status->state = runtime->status->state;
597 status->suspended_state = runtime->status->suspended_state;
598 if (status->state == SNDRV_PCM_STATE_OPEN)
599 goto _end;
600 status->trigger_tstamp = runtime->trigger_tstamp;
8c121586 601 if (snd_pcm_running(substream)) {
1da177e4 602 snd_pcm_update_hw_ptr(substream);
8c121586
JK		 603 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
604 status->tstamp = runtime->status->tstamp;
605 goto _tstamp_end;
606 }
607 }
a713b583 608 snd_pcm_gettime(runtime, &status->tstamp);
8c121586 609 _tstamp_end:
1da177e4
LT		 610 status->appl_ptr = runtime->control->appl_ptr;
611 status->hw_ptr = runtime->status->hw_ptr;
612 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
613 status->avail = snd_pcm_playback_avail(runtime);
614 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
4bbe1ddf 615 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1da177e4 616 status->delay = runtime->buffer_size - status->avail;
4bbe1ddf
TI		 617 status->delay += runtime->delay;
618 } else
1da177e4
LT		 619 status->delay = 0;
620 } else {
621 status->avail = snd_pcm_capture_avail(runtime);
622 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
4bbe1ddf 623 status->delay = status->avail + runtime->delay;
1da177e4
LT		 624 else
625 status->delay = 0;
626 }
627 status->avail_max = runtime->avail_max;
628 status->overrange = runtime->overrange;
629 runtime->avail_max = 0;
630 runtime->overrange = 0;
631 _end:
632 snd_pcm_stream_unlock_irq(substream);
633 return 0;
634}
635
877211f5
TI		 636static int snd_pcm_status_user(struct snd_pcm_substream *substream,
637 struct snd_pcm_status __user * _status)
1da177e4 638{
877211f5 639 struct snd_pcm_status status;
1da177e4
LT		 640 int res;
641
1da177e4
LT		 642 memset(&status, 0, sizeof(status));
643 res = snd_pcm_status(substream, &status);
644 if (res < 0)
645 return res;
646 if (copy_to_user(_status, &status, sizeof(status)))
647 return -EFAULT;
648 return 0;
649}
650
877211f5
TI		 651static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
652 struct snd_pcm_channel_info * info)
1da177e4 653{
877211f5 654 struct snd_pcm_runtime *runtime;
1da177e4
LT		 655 unsigned int channel;
656
1da177e4
LT		 657 channel = info->channel;
658 runtime = substream->runtime;
659 snd_pcm_stream_lock_irq(substream);
660 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
661 snd_pcm_stream_unlock_irq(substream);
662 return -EBADFD;
663 }
664 snd_pcm_stream_unlock_irq(substream);
665 if (channel >= runtime->channels)
666 return -EINVAL;
667 memset(info, 0, sizeof(*info));
668 info->channel = channel;
669 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
670}
671
877211f5
TI		 672static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
673 struct snd_pcm_channel_info __user * _info)
1da177e4 674{
877211f5 675 struct snd_pcm_channel_info info;
1da177e4
LT		 676 int res;
677
678 if (copy_from_user(&info, _info, sizeof(info)))
679 return -EFAULT;
680 res = snd_pcm_channel_info(substream, &info);
681 if (res < 0)
682 return res;
683 if (copy_to_user(_info, &info, sizeof(info)))
684 return -EFAULT;
685 return 0;
686}
687
877211f5 688static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 689{
877211f5 690 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 691 if (runtime->trigger_master == NULL)
692 return;
693 if (runtime->trigger_master == substream) {
b751eef1 694 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 695 } else {
696 snd_pcm_trigger_tstamp(runtime->trigger_master);
697 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
698 }
699 runtime->trigger_master = NULL;
700}
701
702struct action_ops {
877211f5
TI		 703 int (*pre_action)(struct snd_pcm_substream *substream, int state);
704 int (*do_action)(struct snd_pcm_substream *substream, int state);
705 void (*undo_action)(struct snd_pcm_substream *substream, int state);
706 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 707};
708
709/*
710 * this functions is core for handling of linked stream
711 * Note: the stream state might be changed also on failure
712 * Note2: call with calling stream lock + link lock
713 */
714static int snd_pcm_action_group(struct action_ops *ops,
877211f5 715 struct snd_pcm_substream *substream,
1da177e4
LT		 716 int state, int do_lock)
717{
877211f5
TI		 718 struct snd_pcm_substream *s = NULL;
719 struct snd_pcm_substream *s1;
1da177e4
LT		 720 int res = 0;
721
ef991b95 722 snd_pcm_group_for_each_entry(s, substream) {
1da177e4 723 if (do_lock && s != substream)
208eee2a
FD		 724 spin_lock_nested(&s->self_group.lock,
725 SINGLE_DEPTH_NESTING);
1da177e4
LT		 726 res = ops->pre_action(s, state);
727 if (res < 0)
728 goto _unlock;
729 }
ef991b95 730 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 731 res = ops->do_action(s, state);
732 if (res < 0) {
733 if (ops->undo_action) {
ef991b95 734 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 735 if (s1 == s) /* failed stream */
736 break;
737 ops->undo_action(s1, state);
738 }
739 }
740 s = NULL; /* unlock all */
741 goto _unlock;
742 }
743 }
ef991b95 744 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 745 ops->post_action(s, state);
746 }
747 _unlock:
748 if (do_lock) {
749 /* unlock streams */
ef991b95 750 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 751 if (s1 != substream)
752 spin_unlock(&s1->self_group.lock);
753 if (s1 == s) /* end */
754 break;
755 }
756 }
757 return res;
758}
759
760/*
761 * Note: call with stream lock
762 */
763static int snd_pcm_action_single(struct action_ops *ops,
877211f5 764 struct snd_pcm_substream *substream,
1da177e4
LT		 765 int state)
766{
767 int res;
768
769 res = ops->pre_action(substream, state);
770 if (res < 0)
771 return res;
772 res = ops->do_action(substream, state);
773 if (res == 0)
774 ops->post_action(substream, state);
775 else if (ops->undo_action)
776 ops->undo_action(substream, state);
777 return res;
778}
779
780/*
781 * Note: call with stream lock
782 */
783static int snd_pcm_action(struct action_ops *ops,
877211f5 784 struct snd_pcm_substream *substream,
1da177e4
LT		 785 int state)
786{
787 int res;
788
789 if (snd_pcm_stream_linked(substream)) {
790 if (!spin_trylock(&substream->group->lock)) {
791 spin_unlock(&substream->self_group.lock);
792 spin_lock(&substream->group->lock);
793 spin_lock(&substream->self_group.lock);
794 }
795 res = snd_pcm_action_group(ops, substream, state, 1);
796 spin_unlock(&substream->group->lock);
797 } else {
798 res = snd_pcm_action_single(ops, substream, state);
799 }
800 return res;
801}
802
803/*
804 * Note: don't use any locks before
805 */
806static int snd_pcm_action_lock_irq(struct action_ops *ops,
877211f5 807 struct snd_pcm_substream *substream,
1da177e4
LT		 808 int state)
809{
810 int res;
811
812 read_lock_irq(&snd_pcm_link_rwlock);
813 if (snd_pcm_stream_linked(substream)) {
814 spin_lock(&substream->group->lock);
815 spin_lock(&substream->self_group.lock);
816 res = snd_pcm_action_group(ops, substream, state, 1);
817 spin_unlock(&substream->self_group.lock);
818 spin_unlock(&substream->group->lock);
819 } else {
820 spin_lock(&substream->self_group.lock);
821 res = snd_pcm_action_single(ops, substream, state);
822 spin_unlock(&substream->self_group.lock);
823 }
824 read_unlock_irq(&snd_pcm_link_rwlock);
825 return res;
826}
827
828/*
829 */
830static int snd_pcm_action_nonatomic(struct action_ops *ops,
877211f5 831 struct snd_pcm_substream *substream,
1da177e4
LT		 832 int state)
833{
834 int res;
835
836 down_read(&snd_pcm_link_rwsem);
837 if (snd_pcm_stream_linked(substream))
838 res = snd_pcm_action_group(ops, substream, state, 0);
839 else
840 res = snd_pcm_action_single(ops, substream, state);
841 up_read(&snd_pcm_link_rwsem);
842 return res;
843}
844
845/*
846 * start callbacks
847 */
877211f5 848static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 849{
877211f5 850 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 851 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
852 return -EBADFD;
853 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
854 !snd_pcm_playback_data(substream))
855 return -EPIPE;
856 runtime->trigger_master = substream;
857 return 0;
858}
859
877211f5 860static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 861{
862 if (substream->runtime->trigger_master != substream)
863 return 0;
864 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
865}
866
877211f5 867static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 868{
869 if (substream->runtime->trigger_master == substream)
870 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
871}
872
877211f5 873static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 874{
877211f5 875 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 876 snd_pcm_trigger_tstamp(substream);
6af3fb72 877 runtime->hw_ptr_jiffies = jiffies;
bd76af0f
JK		 878 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
879 runtime->rate;
1da177e4
LT		 880 runtime->status->state = state;
881 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
882 runtime->silence_size > 0)
883 snd_pcm_playback_silence(substream, ULONG_MAX);
1da177e4 884 if (substream->timer)
877211f5
TI		 885 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
886 &runtime->trigger_tstamp);
1da177e4
LT		 887}
888
889static struct action_ops snd_pcm_action_start = {
890 .pre_action = snd_pcm_pre_start,
891 .do_action = snd_pcm_do_start,
892 .undo_action = snd_pcm_undo_start,
893 .post_action = snd_pcm_post_start
894};
895
896/**
1c85cc64 897 * snd_pcm_start - start all linked streams
df8db936 898 * @substream: the PCM substream instance
1da177e4 899 */
877211f5 900int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 901{
877211f5
TI		 902 return snd_pcm_action(&snd_pcm_action_start, substream,
903 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 904}
905
906/*
907 * stop callbacks
908 */
877211f5 909static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 910{
877211f5 911 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 912 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
913 return -EBADFD;
914 runtime->trigger_master = substream;
915 return 0;
916}
917
877211f5 918static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 919{
920 if (substream->runtime->trigger_master == substream &&
921 snd_pcm_running(substream))
922 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
923 return 0; /* unconditonally stop all substreams */
924}
925
877211f5 926static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 927{
877211f5 928 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 929 if (runtime->status->state != state) {
930 snd_pcm_trigger_tstamp(substream);
931 if (substream->timer)
877211f5
TI		 932 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
933 &runtime->trigger_tstamp);
1da177e4 934 runtime->status->state = state;
1da177e4
LT		 935 }
936 wake_up(&runtime->sleep);
c91a988d 937 wake_up(&runtime->tsleep);
1da177e4
LT		 938}
939
940static struct action_ops snd_pcm_action_stop = {
941 .pre_action = snd_pcm_pre_stop,
942 .do_action = snd_pcm_do_stop,
943 .post_action = snd_pcm_post_stop
944};
945
946/**
1c85cc64 947 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 948 * @substream: the PCM substream instance
949 * @state: PCM state after stopping the stream
1da177e4 950 *
1c85cc64 951 * The state of each stream is then changed to the given state unconditionally.
1da177e4 952 */
fea952e5 953int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1da177e4
LT		 954{
955 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
956}
957
e88e8ae6
TI		 958EXPORT_SYMBOL(snd_pcm_stop);
959
1da177e4 960/**
1c85cc64 961 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 962 * @substream: the PCM substream
1da177e4 963 *
1c85cc64 964 * After stopping, the state is changed to SETUP.
1da177e4
LT		 965 * Unlike snd_pcm_stop(), this affects only the given stream.
966 */
877211f5 967int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 968{
877211f5
TI		 969 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
970 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 971}
972
973/*
974 * pause callbacks
975 */
877211f5 976static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 977{
877211f5 978 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 979 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
980 return -ENOSYS;
981 if (push) {
982 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
983 return -EBADFD;
984 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
985 return -EBADFD;
986 runtime->trigger_master = substream;
987 return 0;
988}
989
877211f5 990static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 991{
992 if (substream->runtime->trigger_master != substream)
993 return 0;
56385a12
JK		 994 /* some drivers might use hw_ptr to recover from the pause -
995 update the hw_ptr now */
996 if (push)
997 snd_pcm_update_hw_ptr(substream);
6af3fb72 998 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
b595076a 999 * a delta between the current jiffies, this gives a large enough
6af3fb72
TI		 1000 * delta, effectively to skip the check once.
1001 */
1002 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4
LT		 1003 return substream->ops->trigger(substream,
1004 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1005 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1006}
1007
877211f5 1008static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1009{
1010 if (substream->runtime->trigger_master == substream)
1011 substream->ops->trigger(substream,
1012 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1013 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1014}
1015
877211f5 1016static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1017{
877211f5 1018 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1019 snd_pcm_trigger_tstamp(substream);
1020 if (push) {
1021 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1022 if (substream->timer)
877211f5
TI		 1023 snd_timer_notify(substream->timer,
1024 SNDRV_TIMER_EVENT_MPAUSE,
1025 &runtime->trigger_tstamp);
1da177e4 1026 wake_up(&runtime->sleep);
c91a988d 1027 wake_up(&runtime->tsleep);
1da177e4
LT		 1028 } else {
1029 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1da177e4 1030 if (substream->timer)
877211f5
TI		 1031 snd_timer_notify(substream->timer,
1032 SNDRV_TIMER_EVENT_MCONTINUE,
1033 &runtime->trigger_tstamp);
1da177e4
LT		 1034 }
1035}
1036
1037static struct action_ops snd_pcm_action_pause = {
1038 .pre_action = snd_pcm_pre_pause,
1039 .do_action = snd_pcm_do_pause,
1040 .undo_action = snd_pcm_undo_pause,
1041 .post_action = snd_pcm_post_pause
1042};
1043
1044/*
1045 * Push/release the pause for all linked streams.
1046 */
877211f5 1047static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1048{
1049 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1050}
1051
1052#ifdef CONFIG_PM
1053/* suspend */
1054
877211f5 1055static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1056{
877211f5 1057 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1058 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1059 return -EBUSY;
1060 runtime->trigger_master = substream;
1061 return 0;
1062}
1063
877211f5 1064static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1065{
877211f5 1066 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1067 if (runtime->trigger_master != substream)
1068 return 0;
1069 if (! snd_pcm_running(substream))
1070 return 0;
1071 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1072 return 0; /* suspend unconditionally */
1073}
1074
877211f5 1075static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1076{
877211f5 1077 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1078 snd_pcm_trigger_tstamp(substream);
1079 if (substream->timer)
877211f5
TI		 1080 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1081 &runtime->trigger_tstamp);
1da177e4
LT		 1082 runtime->status->suspended_state = runtime->status->state;
1083 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1da177e4 1084 wake_up(&runtime->sleep);
c91a988d 1085 wake_up(&runtime->tsleep);
1da177e4
LT		 1086}
1087
1088static struct action_ops snd_pcm_action_suspend = {
1089 .pre_action = snd_pcm_pre_suspend,
1090 .do_action = snd_pcm_do_suspend,
1091 .post_action = snd_pcm_post_suspend
1092};
1093
1094/**
1c85cc64 1095 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1096 * @substream: the PCM substream
1da177e4 1097 *
1da177e4
LT		 1098 * After this call, all streams are changed to SUSPENDED state.
1099 */
877211f5 1100int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1101{
1102 int err;
1103 unsigned long flags;
1104
603bf524
TI		 1105 if (! substream)
1106 return 0;
1107
1da177e4
LT		 1108 snd_pcm_stream_lock_irqsave(substream, flags);
1109 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1110 snd_pcm_stream_unlock_irqrestore(substream, flags);
1111 return err;
1112}
1113
e88e8ae6
TI		 1114EXPORT_SYMBOL(snd_pcm_suspend);
1115
1da177e4 1116/**
1c85cc64 1117 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1118 * @pcm: the PCM instance
1da177e4 1119 *
1da177e4
LT		 1120 * After this call, all streams are changed to SUSPENDED state.
1121 */
877211f5 1122int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1123{
877211f5 1124 struct snd_pcm_substream *substream;
1da177e4
LT		 1125 int stream, err = 0;
1126
603bf524
TI		 1127 if (! pcm)
1128 return 0;
1129
1da177e4 1130 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1131 for (substream = pcm->streams[stream].substream;
1132 substream; substream = substream->next) {
1da177e4
LT		 1133 /* FIXME: the open/close code should lock this as well */
1134 if (substream->runtime == NULL)
1135 continue;
1136 err = snd_pcm_suspend(substream);
1137 if (err < 0 && err != -EBUSY)
1138 return err;
1139 }
1140 }
1141 return 0;
1142}
1143
e88e8ae6
TI		 1144EXPORT_SYMBOL(snd_pcm_suspend_all);
1145
1da177e4
LT		 1146/* resume */
1147
877211f5 1148static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1149{
877211f5 1150 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1151 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1152 return -ENOSYS;
1153 runtime->trigger_master = substream;
1154 return 0;
1155}
1156
877211f5 1157static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1158{
877211f5 1159 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1160 if (runtime->trigger_master != substream)
1161 return 0;
1162 /* DMA not running previously? */
1163 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1164 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1165 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1166 return 0;
1167 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1168}
1169
877211f5 1170static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1171{
1172 if (substream->runtime->trigger_master == substream &&
1173 snd_pcm_running(substream))
1174 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1175}
1176
877211f5 1177static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1178{
877211f5 1179 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1180 snd_pcm_trigger_tstamp(substream);
1181 if (substream->timer)
877211f5
TI		 1182 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1183 &runtime->trigger_tstamp);
1da177e4 1184 runtime->status->state = runtime->status->suspended_state;
1da177e4
LT		 1185}
1186
1187static struct action_ops snd_pcm_action_resume = {
1188 .pre_action = snd_pcm_pre_resume,
1189 .do_action = snd_pcm_do_resume,
1190 .undo_action = snd_pcm_undo_resume,
1191 .post_action = snd_pcm_post_resume
1192};
1193
877211f5 1194static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1195{
877211f5 1196 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1197 int res;
1198
1199 snd_power_lock(card);
cbac4b0c 1200 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1201 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1202 snd_power_unlock(card);
1203 return res;
1204}
1205
1206#else
1207
877211f5 1208static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1209{
1210 return -ENOSYS;
1211}
1212
1213#endif /* CONFIG_PM */
1214
1215/*
1216 * xrun ioctl
1217 *
1218 * Change the RUNNING stream(s) to XRUN state.
1219 */
877211f5 1220static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1221{
877211f5
TI		 1222 struct snd_card *card = substream->pcm->card;
1223 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1224 int result;
1225
1226 snd_power_lock(card);
1227 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1228 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1229 if (result < 0)
1230 goto _unlock;
1231 }
1232
1233 snd_pcm_stream_lock_irq(substream);
1234 switch (runtime->status->state) {
1235 case SNDRV_PCM_STATE_XRUN:
1236 result = 0; /* already there */
1237 break;
1238 case SNDRV_PCM_STATE_RUNNING:
1239 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1240 break;
1241 default:
1242 result = -EBADFD;
1243 }
1244 snd_pcm_stream_unlock_irq(substream);
1245 _unlock:
1246 snd_power_unlock(card);
1247 return result;
1248}
1249
1250/*
1251 * reset ioctl
1252 */
877211f5 1253static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1254{
877211f5 1255 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1256 switch (runtime->status->state) {
1257 case SNDRV_PCM_STATE_RUNNING:
1258 case SNDRV_PCM_STATE_PREPARED:
1259 case SNDRV_PCM_STATE_PAUSED:
1260 case SNDRV_PCM_STATE_SUSPENDED:
1261 return 0;
1262 default:
1263 return -EBADFD;
1264 }
1265}
1266
877211f5 1267static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1268{
877211f5 1269 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1270 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1271 if (err < 0)
1272 return err;
1da177e4 1273 runtime->hw_ptr_base = 0;
e7636925
JK		 1274 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1275 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1276 runtime->silence_start = runtime->status->hw_ptr;
1277 runtime->silence_filled = 0;
1278 return 0;
1279}
1280
877211f5 1281static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1282{
877211f5 1283 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1284 runtime->control->appl_ptr = runtime->status->hw_ptr;
1285 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1286 runtime->silence_size > 0)
1287 snd_pcm_playback_silence(substream, ULONG_MAX);
1288}
1289
1290static struct action_ops snd_pcm_action_reset = {
1291 .pre_action = snd_pcm_pre_reset,
1292 .do_action = snd_pcm_do_reset,
1293 .post_action = snd_pcm_post_reset
1294};
1295
877211f5 1296static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1297{
1298 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1299}
1300
1301/*
1302 * prepare ioctl
1303 */
0df63e44
TI		 1304/* we use the second argument for updating f_flags */
1305static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1306 int f_flags)
1da177e4 1307{
877211f5 1308 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1309 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1310 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1311 return -EBADFD;
1312 if (snd_pcm_running(substream))
1313 return -EBUSY;
0df63e44 1314 substream->f_flags = f_flags;
1da177e4
LT		 1315 return 0;
1316}
1317
877211f5 1318static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1319{
1320 int err;
1321 err = substream->ops->prepare(substream);
1322 if (err < 0)
1323 return err;
1324 return snd_pcm_do_reset(substream, 0);
1325}
1326
877211f5 1327static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1328{
877211f5 1329 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 1330 runtime->control->appl_ptr = runtime->status->hw_ptr;
9b0573c0 1331 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1da177e4
LT		 1332}
1333
1334static struct action_ops snd_pcm_action_prepare = {
1335 .pre_action = snd_pcm_pre_prepare,
1336 .do_action = snd_pcm_do_prepare,
1337 .post_action = snd_pcm_post_prepare
1338};
1339
1340/**
1c85cc64 1341 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1342 * @substream: the PCM substream instance
0df63e44 1343 * @file: file to refer f_flags
1da177e4 1344 */
0df63e44
TI		 1345static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1346 struct file *file)
1da177e4
LT		 1347{
1348 int res;
877211f5 1349 struct snd_card *card = substream->pcm->card;
0df63e44
TI		 1350 int f_flags;
1351
1352 if (file)
1353 f_flags = file->f_flags;
1354 else
1355 f_flags = substream->f_flags;
1da177e4
LT		 1356
1357 snd_power_lock(card);
cbac4b0c 1358 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
0df63e44
TI		 1359 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1360 substream, f_flags);
1da177e4
LT		 1361 snd_power_unlock(card);
1362 return res;
1363}
1364
1365/*
1366 * drain ioctl
1367 */
1368
877211f5 1369static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1370{
4f7c39dc
TI		 1371 struct snd_pcm_runtime *runtime = substream->runtime;
1372 switch (runtime->status->state) {
1373 case SNDRV_PCM_STATE_OPEN:
1374 case SNDRV_PCM_STATE_DISCONNECTED:
1375 case SNDRV_PCM_STATE_SUSPENDED:
1376 return -EBADFD;
1377 }
1378 runtime->trigger_master = substream;
1da177e4
LT		 1379 return 0;
1380}
1381
877211f5 1382static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1383{
877211f5 1384 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1385 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1386 switch (runtime->status->state) {
1387 case SNDRV_PCM_STATE_PREPARED:
1388 /* start playback stream if possible */
1389 if (! snd_pcm_playback_empty(substream)) {
1390 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1391 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1392 }
1393 break;
1394 case SNDRV_PCM_STATE_RUNNING:
1395 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1396 break;
4f7c39dc
TI		 1397 case SNDRV_PCM_STATE_XRUN:
1398 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1399 break;
1da177e4
LT		 1400 default:
1401 break;
1402 }
1403 } else {
1404 /* stop running stream */
1405 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
b05e5787 1406 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1407 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1408 snd_pcm_do_stop(substream, new_state);
1409 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1410 }
1411 }
1412 return 0;
1413}
1414
877211f5 1415static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1416{
1417}
1418
1419static struct action_ops snd_pcm_action_drain_init = {
1420 .pre_action = snd_pcm_pre_drain_init,
1421 .do_action = snd_pcm_do_drain_init,
1422 .post_action = snd_pcm_post_drain_init
1423};
1424
877211f5 1425static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1426
1427/*
1428 * Drain the stream(s).
1429 * When the substream is linked, sync until the draining of all playback streams
1430 * is finished.
1431 * After this call, all streams are supposed to be either SETUP or DRAINING
1432 * (capture only) state.
1433 */
4cdc115f
TI		 1434static int snd_pcm_drain(struct snd_pcm_substream *substream,
1435 struct file *file)
1da177e4 1436{
877211f5
TI		 1437 struct snd_card *card;
1438 struct snd_pcm_runtime *runtime;
ef991b95 1439 struct snd_pcm_substream *s;
d3a7dcfe 1440 wait_queue_t wait;
1da177e4 1441 int result = 0;
4cdc115f 1442 int nonblock = 0;
1da177e4 1443
1da177e4
LT		 1444 card = substream->pcm->card;
1445 runtime = substream->runtime;
1446
1447 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1448 return -EBADFD;
1449
1da177e4
LT		 1450 snd_power_lock(card);
1451 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1452 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1453 if (result < 0) {
1454 snd_power_unlock(card);
1455 return result;
1456 }
1da177e4
LT		 1457 }
1458
4cdc115f
TI		 1459 if (file) {
1460 if (file->f_flags & O_NONBLOCK)
1461 nonblock = 1;
1462 } else if (substream->f_flags & O_NONBLOCK)
1463 nonblock = 1;
1464
21cb2a2e 1465 down_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1466 snd_pcm_stream_lock_irq(substream);
1467 /* resume pause */
d3a7dcfe 1468 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
21cb2a2e
TI		 1469 snd_pcm_pause(substream, 0);
1470
1471 /* pre-start/stop - all running streams are changed to DRAINING state */
1472 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
4cdc115f
TI		 1473 if (result < 0)
1474 goto unlock;
1475 /* in non-blocking, we don't wait in ioctl but let caller poll */
1476 if (nonblock) {
1477 result = -EAGAIN;
1478 goto unlock;
21cb2a2e 1479 }
1da177e4
LT		 1480
1481 for (;;) {
1482 long tout;
d3a7dcfe 1483 struct snd_pcm_runtime *to_check;
1da177e4
LT		 1484 if (signal_pending(current)) {
1485 result = -ERESTARTSYS;
1486 break;
1487 }
d3a7dcfe
TI		 1488 /* find a substream to drain */
1489 to_check = NULL;
1490 snd_pcm_group_for_each_entry(s, substream) {
1491 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1492 continue;
1493 runtime = s->runtime;
1494 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1495 to_check = runtime;
21cb2a2e 1496 break;
d3a7dcfe 1497 }
21cb2a2e 1498 }
d3a7dcfe
TI		 1499 if (!to_check)
1500 break; /* all drained */
1501 init_waitqueue_entry(&wait, current);
1502 add_wait_queue(&to_check->sleep, &wait);
1da177e4 1503 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1504 up_read(&snd_pcm_link_rwsem);
1da177e4 1505 snd_power_unlock(card);
f2b3614c
TI		 1506 if (runtime->no_period_wakeup)
1507 tout = MAX_SCHEDULE_TIMEOUT;
1508 else {
1509 tout = 10;
1510 if (runtime->rate) {
1511 long t = runtime->period_size * 2 / runtime->rate;
1512 tout = max(t, tout);
1513 }
1514 tout = msecs_to_jiffies(tout * 1000);
1515 }
1516 tout = schedule_timeout_interruptible(tout);
1da177e4 1517 snd_power_lock(card);
d3a7dcfe 1518 down_read(&snd_pcm_link_rwsem);
1da177e4 1519 snd_pcm_stream_lock_irq(substream);
d3a7dcfe 1520 remove_wait_queue(&to_check->sleep, &wait);
0914f796
TI		 1521 if (card->shutdown) {
1522 result = -ENODEV;
1523 break;
1524 }
1da177e4
LT		 1525 if (tout == 0) {
1526 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1527 result = -ESTRPIPE;
1528 else {
1529 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1530 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1531 result = -EIO;
1532 }
1533 break;
1534 }
1da177e4 1535 }
21cb2a2e 1536
4cdc115f 1537 unlock:
21cb2a2e 1538 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1539 up_read(&snd_pcm_link_rwsem);
1da177e4 1540 snd_power_unlock(card);
1da177e4
LT		 1541
1542 return result;
1543}
1544
1545/*
1546 * drop ioctl
1547 *
1548 * Immediately put all linked substreams into SETUP state.
1549 */
877211f5 1550static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1551{
877211f5 1552 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1553 int result = 0;
1554
7eaa943c
TI		 1555 if (PCM_RUNTIME_CHECK(substream))
1556 return -ENXIO;
1da177e4 1557 runtime = substream->runtime;
1da177e4 1558
de1b8b93 1559 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
24e8fc49
TI		 1560 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1561 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1da177e4
LT		 1562 return -EBADFD;
1563
1da177e4
LT		 1564 snd_pcm_stream_lock_irq(substream);
1565 /* resume pause */
1566 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1567 snd_pcm_pause(substream, 0);
1568
1569 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1570 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1571 snd_pcm_stream_unlock_irq(substream);
24e8fc49 1572
1da177e4
LT		 1573 return result;
1574}
1575
1576
1577/* WARNING: Don't forget to fput back the file */
bdbf6943 1578static struct file *snd_pcm_file_fd(int fd, int *fput_needed)
1da177e4
LT		 1579{
1580 struct file *file;
1581 struct inode *inode;
f87135f5
CL		 1582 unsigned int minor;
1583
bdbf6943 1584 file = fget_light(fd, fput_needed);
1da177e4
LT		 1585 if (!file)
1586 return NULL;
7bc56323 1587 inode = file->f_path.dentry->d_inode;
1da177e4
LT		 1588 if (!S_ISCHR(inode->i_mode) ||
1589 imajor(inode) != snd_major) {
bdbf6943 1590 fput_light(file, *fput_needed);
1da177e4
LT		 1591 return NULL;
1592 }
1593 minor = iminor(inode);
f87135f5
CL		 1594 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1595 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
bdbf6943 1596 fput_light(file, *fput_needed);
1da177e4
LT		 1597 return NULL;
1598 }
1599 return file;
1600}
1601
1602/*
1603 * PCM link handling
1604 */
877211f5 1605static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1606{
1607 int res = 0;
1608 struct file *file;
877211f5
TI		 1609 struct snd_pcm_file *pcm_file;
1610 struct snd_pcm_substream *substream1;
1662591b 1611 struct snd_pcm_group *group;
bdbf6943 1612 int fput_needed;
1da177e4 1613
bdbf6943 1614 file = snd_pcm_file_fd(fd, &fput_needed);
1da177e4
LT		 1615 if (!file)
1616 return -EBADFD;
1617 pcm_file = file->private_data;
1618 substream1 = pcm_file->substream;
1662591b
TI		 1619 group = kmalloc(sizeof(*group), GFP_KERNEL);
1620 if (!group) {
1621 res = -ENOMEM;
1622 goto _nolock;
1623 }
1da177e4
LT		 1624 down_write(&snd_pcm_link_rwsem);
1625 write_lock_irq(&snd_pcm_link_rwlock);
1626 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1627 substream->runtime->status->state != substream1->runtime->status->state) {
1628 res = -EBADFD;
1629 goto _end;
1630 }
1631 if (snd_pcm_stream_linked(substream1)) {
1632 res = -EALREADY;
1633 goto _end;
1634 }
1635 if (!snd_pcm_stream_linked(substream)) {
1662591b 1636 substream->group = group;
1da177e4
LT		 1637 spin_lock_init(&substream->group->lock);
1638 INIT_LIST_HEAD(&substream->group->substreams);
1639 list_add_tail(&substream->link_list, &substream->group->substreams);
1640 substream->group->count = 1;
1641 }
1642 list_add_tail(&substream1->link_list, &substream->group->substreams);
1643 substream->group->count++;
1644 substream1->group = substream->group;
1645 _end:
1646 write_unlock_irq(&snd_pcm_link_rwlock);
1647 up_write(&snd_pcm_link_rwsem);
1662591b 1648 _nolock:
a0830dbd 1649 snd_card_unref(substream1->pcm->card);
bdbf6943 1650 fput_light(file, fput_needed);
1662591b
TI		 1651 if (res < 0)
1652 kfree(group);
1da177e4
LT		 1653 return res;
1654}
1655
877211f5 1656static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1657{
1658 substream->group = &substream->self_group;
1659 INIT_LIST_HEAD(&substream->self_group.substreams);
1660 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1661}
1662
877211f5 1663static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 1664{
ef991b95 1665 struct snd_pcm_substream *s;
1da177e4
LT		 1666 int res = 0;
1667
1668 down_write(&snd_pcm_link_rwsem);
1669 write_lock_irq(&snd_pcm_link_rwlock);
1670 if (!snd_pcm_stream_linked(substream)) {
1671 res = -EALREADY;
1672 goto _end;
1673 }
1674 list_del(&substream->link_list);
1675 substream->group->count--;
1676 if (substream->group->count == 1) { /* detach the last stream, too */
ef991b95
TI		 1677 snd_pcm_group_for_each_entry(s, substream) {
1678 relink_to_local(s);
1da177e4
LT		 1679 break;
1680 }
1681 kfree(substream->group);
1682 }
1683 relink_to_local(substream);
1684 _end:
1685 write_unlock_irq(&snd_pcm_link_rwlock);
1686 up_write(&snd_pcm_link_rwsem);
1687 return res;
1688}
1689
1690/*
1691 * hw configurator
1692 */
877211f5
TI		 1693static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1694 struct snd_pcm_hw_rule *rule)
1da177e4 1695{
877211f5 1696 struct snd_interval t;
1da177e4
LT		 1697 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1698 hw_param_interval_c(params, rule->deps[1]), &t);
1699 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1700}
1701
877211f5
TI		 1702static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1703 struct snd_pcm_hw_rule *rule)
1da177e4 1704{
877211f5 1705 struct snd_interval t;
1da177e4
LT		 1706 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1707 hw_param_interval_c(params, rule->deps[1]), &t);
1708 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1709}
1710
877211f5
TI		 1711static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1712 struct snd_pcm_hw_rule *rule)
1da177e4 1713{
877211f5 1714 struct snd_interval t;
1da177e4
LT		 1715 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1716 hw_param_interval_c(params, rule->deps[1]),
1717 (unsigned long) rule->private, &t);
1718 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1719}
1720
877211f5
TI		 1721static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1722 struct snd_pcm_hw_rule *rule)
1da177e4 1723{
877211f5 1724 struct snd_interval t;
1da177e4
LT		 1725 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1726 (unsigned long) rule->private,
1727 hw_param_interval_c(params, rule->deps[1]), &t);
1728 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1729}
1730
877211f5
TI		 1731static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1732 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1733{
1734 unsigned int k;
877211f5
TI		 1735 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1736 struct snd_mask m;
1737 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1738 snd_mask_any(&m);
1739 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1740 int bits;
1741 if (! snd_mask_test(mask, k))
1742 continue;
1743 bits = snd_pcm_format_physical_width(k);
1744 if (bits <= 0)
1745 continue; /* ignore invalid formats */
1746 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1747 snd_mask_reset(&m, k);
1748 }
1749 return snd_mask_refine(mask, &m);
1750}
1751
877211f5
TI		 1752static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1753 struct snd_pcm_hw_rule *rule)
1da177e4 1754{
877211f5 1755 struct snd_interval t;
1da177e4
LT		 1756 unsigned int k;
1757 t.min = UINT_MAX;
1758 t.max = 0;
1759 t.openmin = 0;
1760 t.openmax = 0;
1761 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1762 int bits;
1763 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1764 continue;
1765 bits = snd_pcm_format_physical_width(k);
1766 if (bits <= 0)
1767 continue; /* ignore invalid formats */
1768 if (t.min > (unsigned)bits)
1769 t.min = bits;
1770 if (t.max < (unsigned)bits)
1771 t.max = bits;
1772 }
1773 t.integer = 1;
1774 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1775}
1776
1777#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1778#error "Change this table"
1779#endif
1780
1781static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1782 48000, 64000, 88200, 96000, 176400, 192000 };
1783
7653d557
CL		 1784const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1785 .count = ARRAY_SIZE(rates),
1786 .list = rates,
1787};
1788
877211f5
TI		 1789static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1790 struct snd_pcm_hw_rule *rule)
1da177e4 1791{
877211f5 1792 struct snd_pcm_hardware *hw = rule->private;
1da177e4 1793 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 1794 snd_pcm_known_rates.count,
1795 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 1796}
1797
877211f5
TI		 1798static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1799 struct snd_pcm_hw_rule *rule)
1da177e4 1800{
877211f5
TI		 1801 struct snd_interval t;
1802 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 1803 t.min = 0;
1804 t.max = substream->buffer_bytes_max;
1805 t.openmin = 0;
1806 t.openmax = 0;
1807 t.integer = 1;
1808 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1809}
1810
877211f5 1811int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 1812{
877211f5
TI		 1813 struct snd_pcm_runtime *runtime = substream->runtime;
1814 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 1815 int k, err;
1816
1817 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1818 snd_mask_any(constrs_mask(constrs, k));
1819 }
1820
1821 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1822 snd_interval_any(constrs_interval(constrs, k));
1823 }
1824
1825 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1826 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1827 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1828 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1829 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1830
1831 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1832 snd_pcm_hw_rule_format, NULL,
1833 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1834 if (err < 0)
1835 return err;
1836 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1837 snd_pcm_hw_rule_sample_bits, NULL,
1838 SNDRV_PCM_HW_PARAM_FORMAT,
1839 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1840 if (err < 0)
1841 return err;
1842 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1843 snd_pcm_hw_rule_div, NULL,
1844 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1845 if (err < 0)
1846 return err;
1847 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1848 snd_pcm_hw_rule_mul, NULL,
1849 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1850 if (err < 0)
1851 return err;
1852 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1853 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1854 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1855 if (err < 0)
1856 return err;
1857 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1858 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1859 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1860 if (err < 0)
1861 return err;
1862 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1863 snd_pcm_hw_rule_div, NULL,
1864 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1865 if (err < 0)
1866 return err;
1867 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1868 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1869 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1870 if (err < 0)
1871 return err;
1872 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1873 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1874 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1875 if (err < 0)
1876 return err;
1877 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1878 snd_pcm_hw_rule_div, NULL,
1879 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1880 if (err < 0)
1881 return err;
1882 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1883 snd_pcm_hw_rule_div, NULL,
1884 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1885 if (err < 0)
1886 return err;
1887 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1888 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1889 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1890 if (err < 0)
1891 return err;
1892 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1893 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1894 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1895 if (err < 0)
1896 return err;
1897 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1898 snd_pcm_hw_rule_mul, NULL,
1899 SNDRV_PCM_HW_PARAM_PERIOD_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_BUFFER_SIZE,
1903 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1904 SNDRV_PCM_HW_PARAM_BUFFER_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_BUFFER_SIZE,
1908 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1909 SNDRV_PCM_HW_PARAM_BUFFER_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_PERIOD_BYTES,
1913 snd_pcm_hw_rule_muldivk, (void*) 8,
1914 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1915 if (err < 0)
1916 return err;
1917 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1918 snd_pcm_hw_rule_muldivk, (void*) 8,
1919 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 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_PERIOD_TIME,
1923 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1924 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 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_BUFFER_TIME,
1928 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1929 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1930 if (err < 0)
1931 return err;
1932 return 0;
1933}
1934
877211f5 1935int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 1936{
877211f5
TI		 1937 struct snd_pcm_runtime *runtime = substream->runtime;
1938 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 1939 int err;
1940 unsigned int mask = 0;
1941
1942 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1943 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1944 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1945 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1946 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1947 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1948 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1949 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1950 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1951 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1952 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1953 }
1954 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 1955 if (err < 0)
1956 return err;
1da177e4
LT		 1957
1958 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 1959 if (err < 0)
1960 return err;
1da177e4
LT		 1961
1962 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
7eaa943c
TI		 1963 if (err < 0)
1964 return err;
1da177e4
LT		 1965
1966 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1967 hw->channels_min, hw->channels_max);
7eaa943c
TI		 1968 if (err < 0)
1969 return err;
1da177e4
LT		 1970
1971 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1972 hw->rate_min, hw->rate_max);
8b90ca08
GL		 1973 if (err < 0)
1974 return err;
1da177e4
LT		 1975
1976 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1977 hw->period_bytes_min, hw->period_bytes_max);
8b90ca08
GL		 1978 if (err < 0)
1979 return err;
1da177e4
LT		 1980
1981 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1982 hw->periods_min, hw->periods_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_BUFFER_BYTES,
1987 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 1988 if (err < 0)
1989 return err;
1da177e4
LT		 1990
1991 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1992 snd_pcm_hw_rule_buffer_bytes_max, substream,
1993 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1994 if (err < 0)
1995 return err;
1996
1997 /* FIXME: remove */
1998 if (runtime->dma_bytes) {
1999 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c
TI		 2000 if (err < 0)
2001 return -EINVAL;
1da177e4
LT		 2002 }
2003
2004 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2005 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2006 snd_pcm_hw_rule_rate, hw,
2007 SNDRV_PCM_HW_PARAM_RATE, -1);
2008 if (err < 0)
2009 return err;
2010 }
2011
2012 /* FIXME: this belong to lowlevel */
1da177e4
LT		 2013 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2014
2015 return 0;
2016}
2017
3bf75f9b 2018static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2019{
1da177e4 2020 snd_pcm_unlink(substream);
3bf75f9b
TI		 2021}
2022
2023void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2024{
0df63e44
TI		 2025 substream->ref_count--;
2026 if (substream->ref_count > 0)
2027 return;
2028
3bf75f9b 2029 snd_pcm_drop(substream);
3bf75f9b 2030 if (substream->hw_opened) {
1da177e4
LT		 2031 if (substream->ops->hw_free != NULL)
2032 substream->ops->hw_free(substream);
2033 substream->ops->close(substream);
3bf75f9b 2034 substream->hw_opened = 0;
1da177e4 2035 }
8699a0b6
TI		 2036 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2037 pm_qos_remove_request(&substream->latency_pm_qos_req);
1576274d
TI		 2038 if (substream->pcm_release) {
2039 substream->pcm_release(substream);
2040 substream->pcm_release = NULL;
2041 }
3bf75f9b
TI		 2042 snd_pcm_detach_substream(substream);
2043}
2044
e88e8ae6
TI		 2045EXPORT_SYMBOL(snd_pcm_release_substream);
2046
3bf75f9b
TI		 2047int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2048 struct file *file,
2049 struct snd_pcm_substream **rsubstream)
2050{
2051 struct snd_pcm_substream *substream;
2052 int err;
2053
2054 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2055 if (err < 0)
2056 return err;
0df63e44
TI		 2057 if (substream->ref_count > 1) {
2058 *rsubstream = substream;
2059 return 0;
2060 }
2061
3bf75f9b
TI		 2062 err = snd_pcm_hw_constraints_init(substream);
2063 if (err < 0) {
2064 snd_printd("snd_pcm_hw_constraints_init failed\n");
2065 goto error;
2066 }
2067
2068 if ((err = substream->ops->open(substream)) < 0)
2069 goto error;
2070
2071 substream->hw_opened = 1;
2072
2073 err = snd_pcm_hw_constraints_complete(substream);
2074 if (err < 0) {
2075 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2076 goto error;
2077 }
2078
2079 *rsubstream = substream;
1da177e4 2080 return 0;
3bf75f9b
TI		 2081
2082 error:
2083 snd_pcm_release_substream(substream);
2084 return err;
1da177e4
LT		 2085}
2086
e88e8ae6
TI		 2087EXPORT_SYMBOL(snd_pcm_open_substream);
2088
1da177e4 2089static int snd_pcm_open_file(struct file *file,
877211f5 2090 struct snd_pcm *pcm,
ffd3d5c6 2091 int stream)
1da177e4 2092{
877211f5
TI		 2093 struct snd_pcm_file *pcm_file;
2094 struct snd_pcm_substream *substream;
3bf75f9b 2095 int err;
1da177e4 2096
3bf75f9b
TI		 2097 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2098 if (err < 0)
2099 return err;
2100
548a648b
TI		 2101 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2102 if (pcm_file == NULL) {
2103 snd_pcm_release_substream(substream);
2104 return -ENOMEM;
2105 }
2106 pcm_file->substream = substream;
2107 if (substream->ref_count == 1) {
0df63e44
TI		 2108 substream->file = pcm_file;
2109 substream->pcm_release = pcm_release_private;
1da177e4 2110 }
1da177e4 2111 file->private_data = pcm_file;
ffd3d5c6 2112
1da177e4
LT		 2113 return 0;
2114}
2115
f87135f5
CL		 2116static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2117{
2118 struct snd_pcm *pcm;
02f4865f
TI		 2119 int err = nonseekable_open(inode, file);
2120 if (err < 0)
2121 return err;
f87135f5
CL		 2122 pcm = snd_lookup_minor_data(iminor(inode),
2123 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
a0830dbd
TI		 2124 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2125 snd_card_unref(pcm->card);
2126 return err;
f87135f5
CL		 2127}
2128
2129static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2130{
877211f5 2131 struct snd_pcm *pcm;
02f4865f
TI		 2132 int err = nonseekable_open(inode, file);
2133 if (err < 0)
2134 return err;
f87135f5
CL		 2135 pcm = snd_lookup_minor_data(iminor(inode),
2136 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
a0830dbd
TI		 2137 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2138 snd_card_unref(pcm->card);
2139 return err;
f87135f5
CL		 2140}
2141
2142static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2143{
2144 int err;
1da177e4
LT		 2145 wait_queue_t wait;
2146
1da177e4
LT		 2147 if (pcm == NULL) {
2148 err = -ENODEV;
2149 goto __error1;
2150 }
2151 err = snd_card_file_add(pcm->card, file);
2152 if (err < 0)
2153 goto __error1;
2154 if (!try_module_get(pcm->card->module)) {
2155 err = -EFAULT;
2156 goto __error2;
2157 }
2158 init_waitqueue_entry(&wait, current);
2159 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2160 mutex_lock(&pcm->open_mutex);
1da177e4 2161 while (1) {
ffd3d5c6 2162 err = snd_pcm_open_file(file, pcm, stream);
1da177e4
LT		 2163 if (err >= 0)
2164 break;
2165 if (err == -EAGAIN) {
2166 if (file->f_flags & O_NONBLOCK) {
2167 err = -EBUSY;
2168 break;
2169 }
2170 } else
2171 break;
2172 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2173 mutex_unlock(&pcm->open_mutex);
1da177e4 2174 schedule();
1a60d4c5 2175 mutex_lock(&pcm->open_mutex);
0914f796
TI		 2176 if (pcm->card->shutdown) {
2177 err = -ENODEV;
2178 break;
2179 }
1da177e4
LT		 2180 if (signal_pending(current)) {
2181 err = -ERESTARTSYS;
2182 break;
2183 }
2184 }
2185 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2186 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2187 if (err < 0)
2188 goto __error;
2189 return err;
2190
2191 __error:
2192 module_put(pcm->card->module);
2193 __error2:
2194 snd_card_file_remove(pcm->card, file);
2195 __error1:
2196 return err;
2197}
2198
2199static int snd_pcm_release(struct inode *inode, struct file *file)
2200{
877211f5
TI		 2201 struct snd_pcm *pcm;
2202 struct snd_pcm_substream *substream;
2203 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2204
2205 pcm_file = file->private_data;
2206 substream = pcm_file->substream;
7eaa943c
TI		 2207 if (snd_BUG_ON(!substream))
2208 return -ENXIO;
1da177e4 2209 pcm = substream->pcm;
1a60d4c5 2210 mutex_lock(&pcm->open_mutex);
3bf75f9b 2211 snd_pcm_release_substream(substream);
548a648b 2212 kfree(pcm_file);
1a60d4c5 2213 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2214 wake_up(&pcm->open_wait);
2215 module_put(pcm->card->module);
2216 snd_card_file_remove(pcm->card, file);
2217 return 0;
2218}
2219
877211f5
TI		 2220static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2221 snd_pcm_uframes_t frames)
1da177e4 2222{
877211f5 2223 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2224 snd_pcm_sframes_t appl_ptr;
2225 snd_pcm_sframes_t ret;
2226 snd_pcm_sframes_t hw_avail;
2227
2228 if (frames == 0)
2229 return 0;
2230
2231 snd_pcm_stream_lock_irq(substream);
2232 switch (runtime->status->state) {
2233 case SNDRV_PCM_STATE_PREPARED:
2234 break;
2235 case SNDRV_PCM_STATE_DRAINING:
2236 case SNDRV_PCM_STATE_RUNNING:
2237 if (snd_pcm_update_hw_ptr(substream) >= 0)
2238 break;
2239 /* Fall through */
2240 case SNDRV_PCM_STATE_XRUN:
2241 ret = -EPIPE;
2242 goto __end;
51840409
LR		 2243 case SNDRV_PCM_STATE_SUSPENDED:
2244 ret = -ESTRPIPE;
2245 goto __end;
1da177e4
LT		 2246 default:
2247 ret = -EBADFD;
2248 goto __end;
2249 }
2250
2251 hw_avail = snd_pcm_playback_hw_avail(runtime);
2252 if (hw_avail <= 0) {
2253 ret = 0;
2254 goto __end;
2255 }
2256 if (frames > (snd_pcm_uframes_t)hw_avail)
2257 frames = hw_avail;
1da177e4
LT		 2258 appl_ptr = runtime->control->appl_ptr - frames;
2259 if (appl_ptr < 0)
2260 appl_ptr += runtime->boundary;
2261 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2262 ret = frames;
2263 __end:
2264 snd_pcm_stream_unlock_irq(substream);
2265 return ret;
2266}
2267
877211f5
TI		 2268static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2269 snd_pcm_uframes_t frames)
1da177e4 2270{
877211f5 2271 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2272 snd_pcm_sframes_t appl_ptr;
2273 snd_pcm_sframes_t ret;
2274 snd_pcm_sframes_t hw_avail;
2275
2276 if (frames == 0)
2277 return 0;
2278
2279 snd_pcm_stream_lock_irq(substream);
2280 switch (runtime->status->state) {
2281 case SNDRV_PCM_STATE_PREPARED:
2282 case SNDRV_PCM_STATE_DRAINING:
2283 break;
2284 case SNDRV_PCM_STATE_RUNNING:
2285 if (snd_pcm_update_hw_ptr(substream) >= 0)
2286 break;
2287 /* Fall through */
2288 case SNDRV_PCM_STATE_XRUN:
2289 ret = -EPIPE;
2290 goto __end;
51840409
LR		 2291 case SNDRV_PCM_STATE_SUSPENDED:
2292 ret = -ESTRPIPE;
2293 goto __end;
1da177e4
LT		 2294 default:
2295 ret = -EBADFD;
2296 goto __end;
2297 }
2298
2299 hw_avail = snd_pcm_capture_hw_avail(runtime);
2300 if (hw_avail <= 0) {
2301 ret = 0;
2302 goto __end;
2303 }
2304 if (frames > (snd_pcm_uframes_t)hw_avail)
2305 frames = hw_avail;
1da177e4
LT		 2306 appl_ptr = runtime->control->appl_ptr - frames;
2307 if (appl_ptr < 0)
2308 appl_ptr += runtime->boundary;
2309 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2310 ret = frames;
2311 __end:
2312 snd_pcm_stream_unlock_irq(substream);
2313 return ret;
2314}
2315
877211f5
TI		 2316static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2317 snd_pcm_uframes_t frames)
1da177e4 2318{
877211f5 2319 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2320 snd_pcm_sframes_t appl_ptr;
2321 snd_pcm_sframes_t ret;
2322 snd_pcm_sframes_t avail;
2323
2324 if (frames == 0)
2325 return 0;
2326
2327 snd_pcm_stream_lock_irq(substream);
2328 switch (runtime->status->state) {
2329 case SNDRV_PCM_STATE_PREPARED:
2330 case SNDRV_PCM_STATE_PAUSED:
2331 break;
2332 case SNDRV_PCM_STATE_DRAINING:
2333 case SNDRV_PCM_STATE_RUNNING:
2334 if (snd_pcm_update_hw_ptr(substream) >= 0)
2335 break;
2336 /* Fall through */
2337 case SNDRV_PCM_STATE_XRUN:
2338 ret = -EPIPE;
2339 goto __end;
51840409
LR		 2340 case SNDRV_PCM_STATE_SUSPENDED:
2341 ret = -ESTRPIPE;
2342 goto __end;
1da177e4
LT		 2343 default:
2344 ret = -EBADFD;
2345 goto __end;
2346 }
2347
2348 avail = snd_pcm_playback_avail(runtime);
2349 if (avail <= 0) {
2350 ret = 0;
2351 goto __end;
2352 }
2353 if (frames > (snd_pcm_uframes_t)avail)
2354 frames = avail;
1da177e4
LT		 2355 appl_ptr = runtime->control->appl_ptr + frames;
2356 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2357 appl_ptr -= runtime->boundary;
2358 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2359 ret = frames;
2360 __end:
2361 snd_pcm_stream_unlock_irq(substream);
2362 return ret;
2363}
2364
877211f5
TI		 2365static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2366 snd_pcm_uframes_t frames)
1da177e4 2367{
877211f5 2368 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2369 snd_pcm_sframes_t appl_ptr;
2370 snd_pcm_sframes_t ret;
2371 snd_pcm_sframes_t avail;
2372
2373 if (frames == 0)
2374 return 0;
2375
2376 snd_pcm_stream_lock_irq(substream);
2377 switch (runtime->status->state) {
2378 case SNDRV_PCM_STATE_PREPARED:
2379 case SNDRV_PCM_STATE_DRAINING:
2380 case SNDRV_PCM_STATE_PAUSED:
2381 break;
2382 case SNDRV_PCM_STATE_RUNNING:
2383 if (snd_pcm_update_hw_ptr(substream) >= 0)
2384 break;
2385 /* Fall through */
2386 case SNDRV_PCM_STATE_XRUN:
2387 ret = -EPIPE;
2388 goto __end;
51840409
LR		 2389 case SNDRV_PCM_STATE_SUSPENDED:
2390 ret = -ESTRPIPE;
2391 goto __end;
1da177e4
LT		 2392 default:
2393 ret = -EBADFD;
2394 goto __end;
2395 }
2396
2397 avail = snd_pcm_capture_avail(runtime);
2398 if (avail <= 0) {
2399 ret = 0;
2400 goto __end;
2401 }
2402 if (frames > (snd_pcm_uframes_t)avail)
2403 frames = avail;
1da177e4
LT		 2404 appl_ptr = runtime->control->appl_ptr + frames;
2405 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2406 appl_ptr -= runtime->boundary;
2407 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2408 ret = frames;
2409 __end:
2410 snd_pcm_stream_unlock_irq(substream);
2411 return ret;
2412}
2413
877211f5 2414static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2415{
877211f5 2416 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2417 int err;
2418
2419 snd_pcm_stream_lock_irq(substream);
2420 switch (runtime->status->state) {
2421 case SNDRV_PCM_STATE_DRAINING:
2422 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2423 goto __badfd;
2424 case SNDRV_PCM_STATE_RUNNING:
2425 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2426 break;
2427 /* Fall through */
2428 case SNDRV_PCM_STATE_PREPARED:
2429 case SNDRV_PCM_STATE_SUSPENDED:
2430 err = 0;
2431 break;
2432 case SNDRV_PCM_STATE_XRUN:
2433 err = -EPIPE;
2434 break;
2435 default:
2436 __badfd:
2437 err = -EBADFD;
2438 break;
2439 }
2440 snd_pcm_stream_unlock_irq(substream);
2441 return err;
2442}
2443
877211f5
TI		 2444static int snd_pcm_delay(struct snd_pcm_substream *substream,
2445 snd_pcm_sframes_t __user *res)
1da177e4 2446{
877211f5 2447 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2448 int err;
2449 snd_pcm_sframes_t n = 0;
2450
2451 snd_pcm_stream_lock_irq(substream);
2452 switch (runtime->status->state) {
2453 case SNDRV_PCM_STATE_DRAINING:
2454 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2455 goto __badfd;
2456 case SNDRV_PCM_STATE_RUNNING:
2457 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2458 break;
2459 /* Fall through */
2460 case SNDRV_PCM_STATE_PREPARED:
2461 case SNDRV_PCM_STATE_SUSPENDED:
2462 err = 0;
2463 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2464 n = snd_pcm_playback_hw_avail(runtime);
2465 else
2466 n = snd_pcm_capture_avail(runtime);
4bbe1ddf 2467 n += runtime->delay;
1da177e4
LT		 2468 break;
2469 case SNDRV_PCM_STATE_XRUN:
2470 err = -EPIPE;
2471 break;
2472 default:
2473 __badfd:
2474 err = -EBADFD;
2475 break;
2476 }
2477 snd_pcm_stream_unlock_irq(substream);
2478 if (!err)
2479 if (put_user(n, res))
2480 err = -EFAULT;
2481 return err;
2482}
2483
877211f5
TI		 2484static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2485 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2486{
877211f5
TI		 2487 struct snd_pcm_runtime *runtime = substream->runtime;
2488 struct snd_pcm_sync_ptr sync_ptr;
2489 volatile struct snd_pcm_mmap_status *status;
2490 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2491 int err;
2492
2493 memset(&sync_ptr, 0, sizeof(sync_ptr));
2494 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2495 return -EFAULT;
877211f5 2496 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2497 return -EFAULT;
2498 status = runtime->status;
2499 control = runtime->control;
2500 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2501 err = snd_pcm_hwsync(substream);
2502 if (err < 0)
2503 return err;
2504 }
2505 snd_pcm_stream_lock_irq(substream);
2506 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2507 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2508 else
2509 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2510 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2511 control->avail_min = sync_ptr.c.control.avail_min;
2512 else
2513 sync_ptr.c.control.avail_min = control->avail_min;
2514 sync_ptr.s.status.state = status->state;
2515 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2516 sync_ptr.s.status.tstamp = status->tstamp;
2517 sync_ptr.s.status.suspended_state = status->suspended_state;
2518 snd_pcm_stream_unlock_irq(substream);
2519 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2520 return -EFAULT;
2521 return 0;
2522}
b751eef1
JK		 2523
2524static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2525{
2526 struct snd_pcm_runtime *runtime = substream->runtime;
2527 int arg;
2528
2529 if (get_user(arg, _arg))
2530 return -EFAULT;
2531 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2532 return -EINVAL;
2533 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2534 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2535 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2536 return 0;
2537}
1da177e4 2538
0df63e44
TI		 2539static int snd_pcm_common_ioctl1(struct file *file,
2540 struct snd_pcm_substream *substream,
1da177e4
LT		 2541 unsigned int cmd, void __user *arg)
2542{
1da177e4
LT		 2543 switch (cmd) {
2544 case SNDRV_PCM_IOCTL_PVERSION:
2545 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2546 case SNDRV_PCM_IOCTL_INFO:
2547 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 2548 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2549 return 0;
b751eef1
JK		 2550 case SNDRV_PCM_IOCTL_TTSTAMP:
2551 return snd_pcm_tstamp(substream, arg);
1da177e4
LT		 2552 case SNDRV_PCM_IOCTL_HW_REFINE:
2553 return snd_pcm_hw_refine_user(substream, arg);
2554 case SNDRV_PCM_IOCTL_HW_PARAMS:
2555 return snd_pcm_hw_params_user(substream, arg);
2556 case SNDRV_PCM_IOCTL_HW_FREE:
2557 return snd_pcm_hw_free(substream);
2558 case SNDRV_PCM_IOCTL_SW_PARAMS:
2559 return snd_pcm_sw_params_user(substream, arg);
2560 case SNDRV_PCM_IOCTL_STATUS:
2561 return snd_pcm_status_user(substream, arg);
2562 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2563 return snd_pcm_channel_info_user(substream, arg);
2564 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2565 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2566 case SNDRV_PCM_IOCTL_RESET:
2567 return snd_pcm_reset(substream);
2568 case SNDRV_PCM_IOCTL_START:
2569 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2570 case SNDRV_PCM_IOCTL_LINK:
2571 return snd_pcm_link(substream, (int)(unsigned long) arg);
2572 case SNDRV_PCM_IOCTL_UNLINK:
2573 return snd_pcm_unlink(substream);
2574 case SNDRV_PCM_IOCTL_RESUME:
2575 return snd_pcm_resume(substream);
2576 case SNDRV_PCM_IOCTL_XRUN:
2577 return snd_pcm_xrun(substream);
2578 case SNDRV_PCM_IOCTL_HWSYNC:
2579 return snd_pcm_hwsync(substream);
2580 case SNDRV_PCM_IOCTL_DELAY:
2581 return snd_pcm_delay(substream, arg);
2582 case SNDRV_PCM_IOCTL_SYNC_PTR:
2583 return snd_pcm_sync_ptr(substream, arg);
59d48582 2584#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2585 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2586 return snd_pcm_hw_refine_old_user(substream, arg);
2587 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2588 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2589#endif
1da177e4 2590 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 2591 return snd_pcm_drain(substream, file);
1da177e4
LT		 2592 case SNDRV_PCM_IOCTL_DROP:
2593 return snd_pcm_drop(substream);
e661d0dd
TI		 2594 case SNDRV_PCM_IOCTL_PAUSE:
2595 {
2596 int res;
2597 snd_pcm_stream_lock_irq(substream);
2598 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2599 snd_pcm_stream_unlock_irq(substream);
2600 return res;
2601 }
1da177e4
LT		 2602 }
2603 snd_printd("unknown ioctl = 0x%x\n", cmd);
2604 return -ENOTTY;
2605}
2606
0df63e44
TI		 2607static int snd_pcm_playback_ioctl1(struct file *file,
2608 struct snd_pcm_substream *substream,
1da177e4
LT		 2609 unsigned int cmd, void __user *arg)
2610{
7eaa943c
TI		 2611 if (snd_BUG_ON(!substream))
2612 return -ENXIO;
2613 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2614 return -EINVAL;
1da177e4
LT		 2615 switch (cmd) {
2616 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2617 {
877211f5
TI		 2618 struct snd_xferi xferi;
2619 struct snd_xferi __user *_xferi = arg;
2620 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2621 snd_pcm_sframes_t result;
2622 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2623 return -EBADFD;
2624 if (put_user(0, &_xferi->result))
2625 return -EFAULT;
2626 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2627 return -EFAULT;
2628 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2629 __put_user(result, &_xferi->result);
2630 return result < 0 ? result : 0;
2631 }
2632 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2633 {
877211f5
TI		 2634 struct snd_xfern xfern;
2635 struct snd_xfern __user *_xfern = arg;
2636 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2637 void __user **bufs;
2638 snd_pcm_sframes_t result;
2639 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2640 return -EBADFD;
2641 if (runtime->channels > 128)
2642 return -EINVAL;
2643 if (put_user(0, &_xfern->result))
2644 return -EFAULT;
2645 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2646 return -EFAULT;
ef44a1ec
LZ		 2647
2648 bufs = memdup_user(xfern.bufs,
2649 sizeof(void *) * runtime->channels);
2650 if (IS_ERR(bufs))
2651 return PTR_ERR(bufs);
1da177e4
LT		 2652 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2653 kfree(bufs);
2654 __put_user(result, &_xfern->result);
2655 return result < 0 ? result : 0;
2656 }
2657 case SNDRV_PCM_IOCTL_REWIND:
2658 {
2659 snd_pcm_uframes_t frames;
2660 snd_pcm_uframes_t __user *_frames = arg;
2661 snd_pcm_sframes_t result;
2662 if (get_user(frames, _frames))
2663 return -EFAULT;
2664 if (put_user(0, _frames))
2665 return -EFAULT;
2666 result = snd_pcm_playback_rewind(substream, frames);
2667 __put_user(result, _frames);
2668 return result < 0 ? result : 0;
2669 }
2670 case SNDRV_PCM_IOCTL_FORWARD:
2671 {
2672 snd_pcm_uframes_t frames;
2673 snd_pcm_uframes_t __user *_frames = arg;
2674 snd_pcm_sframes_t result;
2675 if (get_user(frames, _frames))
2676 return -EFAULT;
2677 if (put_user(0, _frames))
2678 return -EFAULT;
2679 result = snd_pcm_playback_forward(substream, frames);
2680 __put_user(result, _frames);
2681 return result < 0 ? result : 0;
2682 }
1da177e4 2683 }
0df63e44 2684 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2685}
2686
0df63e44
TI		 2687static int snd_pcm_capture_ioctl1(struct file *file,
2688 struct snd_pcm_substream *substream,
1da177e4
LT		 2689 unsigned int cmd, void __user *arg)
2690{
7eaa943c
TI		 2691 if (snd_BUG_ON(!substream))
2692 return -ENXIO;
2693 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2694 return -EINVAL;
1da177e4
LT		 2695 switch (cmd) {
2696 case SNDRV_PCM_IOCTL_READI_FRAMES:
2697 {
877211f5
TI		 2698 struct snd_xferi xferi;
2699 struct snd_xferi __user *_xferi = arg;
2700 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2701 snd_pcm_sframes_t result;
2702 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2703 return -EBADFD;
2704 if (put_user(0, &_xferi->result))
2705 return -EFAULT;
2706 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2707 return -EFAULT;
2708 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2709 __put_user(result, &_xferi->result);
2710 return result < 0 ? result : 0;
2711 }
2712 case SNDRV_PCM_IOCTL_READN_FRAMES:
2713 {
877211f5
TI		 2714 struct snd_xfern xfern;
2715 struct snd_xfern __user *_xfern = arg;
2716 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2717 void *bufs;
2718 snd_pcm_sframes_t result;
2719 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2720 return -EBADFD;
2721 if (runtime->channels > 128)
2722 return -EINVAL;
2723 if (put_user(0, &_xfern->result))
2724 return -EFAULT;
2725 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2726 return -EFAULT;
ef44a1ec
LZ		 2727
2728 bufs = memdup_user(xfern.bufs,
2729 sizeof(void *) * runtime->channels);
2730 if (IS_ERR(bufs))
2731 return PTR_ERR(bufs);
1da177e4
LT		 2732 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2733 kfree(bufs);
2734 __put_user(result, &_xfern->result);
2735 return result < 0 ? result : 0;
2736 }
2737 case SNDRV_PCM_IOCTL_REWIND:
2738 {
2739 snd_pcm_uframes_t frames;
2740 snd_pcm_uframes_t __user *_frames = arg;
2741 snd_pcm_sframes_t result;
2742 if (get_user(frames, _frames))
2743 return -EFAULT;
2744 if (put_user(0, _frames))
2745 return -EFAULT;
2746 result = snd_pcm_capture_rewind(substream, frames);
2747 __put_user(result, _frames);
2748 return result < 0 ? result : 0;
2749 }
2750 case SNDRV_PCM_IOCTL_FORWARD:
2751 {
2752 snd_pcm_uframes_t frames;
2753 snd_pcm_uframes_t __user *_frames = arg;
2754 snd_pcm_sframes_t result;
2755 if (get_user(frames, _frames))
2756 return -EFAULT;
2757 if (put_user(0, _frames))
2758 return -EFAULT;
2759 result = snd_pcm_capture_forward(substream, frames);
2760 __put_user(result, _frames);
2761 return result < 0 ? result : 0;
2762 }
2763 }
0df63e44 2764 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2765}
2766
877211f5
TI		 2767static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2768 unsigned long arg)
1da177e4 2769{
877211f5 2770 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2771
2772 pcm_file = file->private_data;
2773
2774 if (((cmd >> 8) & 0xff) != 'A')
2775 return -ENOTTY;
2776
0df63e44
TI		 2777 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2778 (void __user *)arg);
1da177e4
LT		 2779}
2780
877211f5
TI		 2781static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2782 unsigned long arg)
1da177e4 2783{
877211f5 2784 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2785
2786 pcm_file = file->private_data;
2787
2788 if (((cmd >> 8) & 0xff) != 'A')
2789 return -ENOTTY;
2790
0df63e44
TI		 2791 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2792 (void __user *)arg);
1da177e4
LT		 2793}
2794
bf1bbb5a
TI		 2795int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2796 unsigned int cmd, void *arg)
1da177e4
LT		 2797{
2798 mm_segment_t fs;
2799 int result;
2800
2801 fs = snd_enter_user();
1da177e4
LT		 2802 switch (substream->stream) {
2803 case SNDRV_PCM_STREAM_PLAYBACK:
0df63e44
TI		 2804 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2805 (void __user *)arg);
bf1bbb5a 2806 break;
1da177e4 2807 case SNDRV_PCM_STREAM_CAPTURE:
0df63e44
TI		 2808 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2809 (void __user *)arg);
bf1bbb5a 2810 break;
1da177e4 2811 default:
bf1bbb5a
TI		 2812 result = -EINVAL;
2813 break;
1da177e4 2814 }
bf1bbb5a
TI		 2815 snd_leave_user(fs);
2816 return result;
1da177e4
LT		 2817}
2818
e88e8ae6
TI		 2819EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2820
877211f5
TI		 2821static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2822 loff_t * offset)
1da177e4 2823{
877211f5
TI		 2824 struct snd_pcm_file *pcm_file;
2825 struct snd_pcm_substream *substream;
2826 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2827 snd_pcm_sframes_t result;
2828
2829 pcm_file = file->private_data;
2830 substream = pcm_file->substream;
7eaa943c
TI		 2831 if (PCM_RUNTIME_CHECK(substream))
2832 return -ENXIO;
1da177e4
LT		 2833 runtime = substream->runtime;
2834 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2835 return -EBADFD;
2836 if (!frame_aligned(runtime, count))
2837 return -EINVAL;
2838 count = bytes_to_frames(runtime, count);
2839 result = snd_pcm_lib_read(substream, buf, count);
2840 if (result > 0)
2841 result = frames_to_bytes(runtime, result);
2842 return result;
2843}
2844
877211f5
TI		 2845static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2846 size_t count, loff_t * offset)
1da177e4 2847{
877211f5
TI		 2848 struct snd_pcm_file *pcm_file;
2849 struct snd_pcm_substream *substream;
2850 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2851 snd_pcm_sframes_t result;
2852
2853 pcm_file = file->private_data;
2854 substream = pcm_file->substream;
7eaa943c
TI		 2855 if (PCM_RUNTIME_CHECK(substream))
2856 return -ENXIO;
1da177e4 2857 runtime = substream->runtime;
7eaa943c
TI		 2858 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2859 return -EBADFD;
2860 if (!frame_aligned(runtime, count))
2861 return -EINVAL;
1da177e4
LT		 2862 count = bytes_to_frames(runtime, count);
2863 result = snd_pcm_lib_write(substream, buf, count);
2864 if (result > 0)
2865 result = frames_to_bytes(runtime, result);
1da177e4
LT		 2866 return result;
2867}
2868
ee0b3e67
BP		 2869static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2870 unsigned long nr_segs, loff_t pos)
1da177e4
LT		 2871
2872{
877211f5
TI		 2873 struct snd_pcm_file *pcm_file;
2874 struct snd_pcm_substream *substream;
2875 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2876 snd_pcm_sframes_t result;
2877 unsigned long i;
2878 void __user **bufs;
2879 snd_pcm_uframes_t frames;
2880
ee0b3e67 2881 pcm_file = iocb->ki_filp->private_data;
1da177e4 2882 substream = pcm_file->substream;
7eaa943c
TI		 2883 if (PCM_RUNTIME_CHECK(substream))
2884 return -ENXIO;
1da177e4
LT		 2885 runtime = substream->runtime;
2886 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2887 return -EBADFD;
ee0b3e67 2888 if (nr_segs > 1024 || nr_segs != runtime->channels)
1da177e4 2889 return -EINVAL;
ee0b3e67 2890 if (!frame_aligned(runtime, iov->iov_len))
1da177e4 2891 return -EINVAL;
ee0b3e67
BP		 2892 frames = bytes_to_samples(runtime, iov->iov_len);
2893 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2894 if (bufs == NULL)
2895 return -ENOMEM;
ee0b3e67
BP		 2896 for (i = 0; i < nr_segs; ++i)
2897 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2898 result = snd_pcm_lib_readv(substream, bufs, frames);
2899 if (result > 0)
2900 result = frames_to_bytes(runtime, result);
2901 kfree(bufs);
2902 return result;
2903}
2904
ee0b3e67
BP		 2905static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2906 unsigned long nr_segs, loff_t pos)
1da177e4 2907{
877211f5
TI		 2908 struct snd_pcm_file *pcm_file;
2909 struct snd_pcm_substream *substream;
2910 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2911 snd_pcm_sframes_t result;
2912 unsigned long i;
2913 void __user **bufs;
2914 snd_pcm_uframes_t frames;
2915
ee0b3e67 2916 pcm_file = iocb->ki_filp->private_data;
1da177e4 2917 substream = pcm_file->substream;
7eaa943c
TI		 2918 if (PCM_RUNTIME_CHECK(substream))
2919 return -ENXIO;
1da177e4 2920 runtime = substream->runtime;
7eaa943c
TI		 2921 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2922 return -EBADFD;
ee0b3e67 2923 if (nr_segs > 128 || nr_segs != runtime->channels ||
7eaa943c
TI		 2924 !frame_aligned(runtime, iov->iov_len))
2925 return -EINVAL;
ee0b3e67
BP		 2926 frames = bytes_to_samples(runtime, iov->iov_len);
2927 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2928 if (bufs == NULL)
2929 return -ENOMEM;
ee0b3e67
BP		 2930 for (i = 0; i < nr_segs; ++i)
2931 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2932 result = snd_pcm_lib_writev(substream, bufs, frames);
2933 if (result > 0)
2934 result = frames_to_bytes(runtime, result);
2935 kfree(bufs);
1da177e4
LT		 2936 return result;
2937}
2938
2939static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2940{
877211f5
TI		 2941 struct snd_pcm_file *pcm_file;
2942 struct snd_pcm_substream *substream;
2943 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2944 unsigned int mask;
2945 snd_pcm_uframes_t avail;
2946
2947 pcm_file = file->private_data;
2948
2949 substream = pcm_file->substream;
7eaa943c
TI		 2950 if (PCM_RUNTIME_CHECK(substream))
2951 return -ENXIO;
1da177e4
LT		 2952 runtime = substream->runtime;
2953
2954 poll_wait(file, &runtime->sleep, wait);
2955
2956 snd_pcm_stream_lock_irq(substream);
2957 avail = snd_pcm_playback_avail(runtime);
2958 switch (runtime->status->state) {
2959 case SNDRV_PCM_STATE_RUNNING:
2960 case SNDRV_PCM_STATE_PREPARED:
2961 case SNDRV_PCM_STATE_PAUSED:
2962 if (avail >= runtime->control->avail_min) {
2963 mask = POLLOUT | POLLWRNORM;
2964 break;
2965 }
2966 /* Fall through */
2967 case SNDRV_PCM_STATE_DRAINING:
2968 mask = 0;
2969 break;
2970 default:
2971 mask = POLLOUT | POLLWRNORM | POLLERR;
2972 break;
2973 }
2974 snd_pcm_stream_unlock_irq(substream);
2975 return mask;
2976}
2977
2978static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2979{
877211f5
TI		 2980 struct snd_pcm_file *pcm_file;
2981 struct snd_pcm_substream *substream;
2982 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2983 unsigned int mask;
2984 snd_pcm_uframes_t avail;
2985
2986 pcm_file = file->private_data;
2987
2988 substream = pcm_file->substream;
7eaa943c
TI		 2989 if (PCM_RUNTIME_CHECK(substream))
2990 return -ENXIO;
1da177e4
LT		 2991 runtime = substream->runtime;
2992
2993 poll_wait(file, &runtime->sleep, wait);
2994
2995 snd_pcm_stream_lock_irq(substream);
2996 avail = snd_pcm_capture_avail(runtime);
2997 switch (runtime->status->state) {
2998 case SNDRV_PCM_STATE_RUNNING:
2999 case SNDRV_PCM_STATE_PREPARED:
3000 case SNDRV_PCM_STATE_PAUSED:
3001 if (avail >= runtime->control->avail_min) {
3002 mask = POLLIN | POLLRDNORM;
3003 break;
3004 }
3005 mask = 0;
3006 break;
3007 case SNDRV_PCM_STATE_DRAINING:
3008 if (avail > 0) {
3009 mask = POLLIN | POLLRDNORM;
3010 break;
3011 }
3012 /* Fall through */
3013 default:
3014 mask = POLLIN | POLLRDNORM | POLLERR;
3015 break;
3016 }
3017 snd_pcm_stream_unlock_irq(substream);
3018 return mask;
3019}
3020
3021/*
3022 * mmap support
3023 */
3024
3025/*
3026 * Only on coherent architectures, we can mmap the status and the control records
3027 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3028 */
3029#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3030/*
3031 * mmap status record
3032 */
3ad5afcd
NP		 3033static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3034 struct vm_fault *vmf)
1da177e4 3035{
877211f5
TI		 3036 struct snd_pcm_substream *substream = area->vm_private_data;
3037 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3038
3039 if (substream == NULL)
3ad5afcd 3040 return VM_FAULT_SIGBUS;
1da177e4 3041 runtime = substream->runtime;
3ad5afcd
NP		 3042 vmf->page = virt_to_page(runtime->status);
3043 get_page(vmf->page);
3044 return 0;
1da177e4
LT		 3045}
3046
f0f37e2f 3047static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 3048{
3ad5afcd 3049 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3050};
3051
877211f5 3052static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3053 struct vm_area_struct *area)
3054{
1da177e4
LT		 3055 long size;
3056 if (!(area->vm_flags & VM_READ))
3057 return -EINVAL;
1da177e4 3058 size = area->vm_end - area->vm_start;
877211f5 3059 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3060 return -EINVAL;
3061 area->vm_ops = &snd_pcm_vm_ops_status;
3062 area->vm_private_data = substream;
314e51b9 3063 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3064 return 0;
3065}
3066
3067/*
3068 * mmap control record
3069 */
3ad5afcd
NP		 3070static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3071 struct vm_fault *vmf)
1da177e4 3072{
877211f5
TI		 3073 struct snd_pcm_substream *substream = area->vm_private_data;
3074 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3075
3076 if (substream == NULL)
3ad5afcd 3077 return VM_FAULT_SIGBUS;
1da177e4 3078 runtime = substream->runtime;
3ad5afcd
NP		 3079 vmf->page = virt_to_page(runtime->control);
3080 get_page(vmf->page);
3081 return 0;
1da177e4
LT		 3082}
3083
f0f37e2f 3084static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3085{
3ad5afcd 3086 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3087};
3088
877211f5 3089static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3090 struct vm_area_struct *area)
3091{
1da177e4
LT		 3092 long size;
3093 if (!(area->vm_flags & VM_READ))
3094 return -EINVAL;
1da177e4 3095 size = area->vm_end - area->vm_start;
877211f5 3096 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3097 return -EINVAL;
3098 area->vm_ops = &snd_pcm_vm_ops_control;
3099 area->vm_private_data = substream;
314e51b9 3100 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1da177e4
LT		 3101 return 0;
3102}
3103#else /* ! coherent mmap */
3104/*
3105 * don't support mmap for status and control records.
3106 */
877211f5 3107static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3108 struct vm_area_struct *area)
3109{
3110 return -ENXIO;
3111}
877211f5 3112static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3113 struct vm_area_struct *area)
3114{
3115 return -ENXIO;
3116}
3117#endif /* coherent mmap */
3118
9eb4a067
TI		 3119static inline struct page *
3120snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3121{
3122 void *vaddr = substream->runtime->dma_area + ofs;
66b6cfac
TI		 3123#if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3124 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3125 return virt_to_page(CAC_ADDR(vaddr));
6985c887
TI		 3126#endif
3127#if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3128 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3129 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3130 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3131 /* assume dma_handle set via pfn_to_phys() in
3132 * mm/dma-noncoherent.c
3133 */
3134 return pfn_to_page(addr >> PAGE_SHIFT);
3135 }
66b6cfac 3136#endif
9eb4a067
TI		 3137 return virt_to_page(vaddr);
3138}
3139
1da177e4 3140/*
3ad5afcd 3141 * fault callback for mmapping a RAM page
1da177e4 3142 */
3ad5afcd
NP		 3143static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3144 struct vm_fault *vmf)
1da177e4 3145{
877211f5
TI		 3146 struct snd_pcm_substream *substream = area->vm_private_data;
3147 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3148 unsigned long offset;
3149 struct page * page;
1da177e4
LT		 3150 size_t dma_bytes;
3151
3152 if (substream == NULL)
3ad5afcd 3153 return VM_FAULT_SIGBUS;
1da177e4 3154 runtime = substream->runtime;
3ad5afcd 3155 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3156 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3157 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3158 return VM_FAULT_SIGBUS;
9eb4a067 3159 if (substream->ops->page)
1da177e4 3160 page = substream->ops->page(substream, offset);
9eb4a067
TI		 3161 else
3162 page = snd_pcm_default_page_ops(substream, offset);
3163 if (!page)
3164 return VM_FAULT_SIGBUS;
b5810039 3165 get_page(page);
3ad5afcd
NP		 3166 vmf->page = page;
3167 return 0;
1da177e4
LT		 3168}
3169
657b1989
TI		 3170static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3171 .open = snd_pcm_mmap_data_open,
3172 .close = snd_pcm_mmap_data_close,
3173};
3174
3175static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3176 .open = snd_pcm_mmap_data_open,
3177 .close = snd_pcm_mmap_data_close,
3ad5afcd 3178 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3179};
3180
657b1989
TI		 3181#ifndef ARCH_HAS_DMA_MMAP_COHERENT
3182/* This should be defined / handled globally! */
3183#ifdef CONFIG_ARM
3184#define ARCH_HAS_DMA_MMAP_COHERENT
3185#endif
3186#endif
3187
1da177e4
LT		 3188/*
3189 * mmap the DMA buffer on RAM
3190 */
18a2b962
TI		 3191int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3192 struct vm_area_struct *area)
1da177e4 3193{
314e51b9 3194 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
657b1989
TI		 3195#ifdef ARCH_HAS_DMA_MMAP_COHERENT
3196 if (!substream->ops->page &&
3197 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3198 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3199 area,
3200 substream->runtime->dma_area,
3201 substream->runtime->dma_addr,
3202 area->vm_end - area->vm_start);
9fe17b5d
TI		 3203#elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3204 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3205 !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3206 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
657b1989
TI		 3207#endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3208 /* mmap with fault handler */
3209 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3210 return 0;
3211}
18a2b962 3212EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
1da177e4
LT		 3213
3214/*
3215 * mmap the DMA buffer on I/O memory area
3216 */
3217#if SNDRV_PCM_INFO_MMAP_IOMEM
877211f5
TI		 3218int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3219 struct vm_area_struct *area)
1da177e4
LT		 3220{
3221 long size;
3222 unsigned long offset;
3223
1da177e4 3224 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
1da177e4
LT		 3225 area->vm_flags |= VM_IO;
3226 size = area->vm_end - area->vm_start;
3227 offset = area->vm_pgoff << PAGE_SHIFT;
3228 if (io_remap_pfn_range(area, area->vm_start,
3229 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3230 size, area->vm_page_prot))
3231 return -EAGAIN;
1da177e4
LT		 3232 return 0;
3233}
e88e8ae6
TI		 3234
3235EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3236#endif /* SNDRV_PCM_INFO_MMAP */
3237
3238/*
3239 * mmap DMA buffer
3240 */
877211f5 3241int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3242 struct vm_area_struct *area)
3243{
877211f5 3244 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3245 long size;
3246 unsigned long offset;
3247 size_t dma_bytes;
657b1989 3248 int err;
1da177e4
LT		 3249
3250 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3251 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3252 return -EINVAL;
3253 } else {
3254 if (!(area->vm_flags & VM_READ))
3255 return -EINVAL;
3256 }
3257 runtime = substream->runtime;
1da177e4
LT		 3258 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3259 return -EBADFD;
3260 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3261 return -ENXIO;
3262 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3263 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3264 return -EINVAL;
3265 size = area->vm_end - area->vm_start;
3266 offset = area->vm_pgoff << PAGE_SHIFT;
3267 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3268 if ((size_t)size > dma_bytes)
3269 return -EINVAL;
3270 if (offset > dma_bytes - size)
3271 return -EINVAL;
3272
657b1989
TI		 3273 area->vm_ops = &snd_pcm_vm_ops_data;
3274 area->vm_private_data = substream;
1da177e4 3275 if (substream->ops->mmap)
657b1989 3276 err = substream->ops->mmap(substream, area);
1da177e4 3277 else
18a2b962 3278 err = snd_pcm_lib_default_mmap(substream, area);
657b1989
TI		 3279 if (!err)
3280 atomic_inc(&substream->mmap_count);
3281 return err;
1da177e4
LT		 3282}
3283
e88e8ae6
TI		 3284EXPORT_SYMBOL(snd_pcm_mmap_data);
3285
1da177e4
LT		 3286static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3287{
877211f5
TI		 3288 struct snd_pcm_file * pcm_file;
3289 struct snd_pcm_substream *substream;
1da177e4
LT		 3290 unsigned long offset;
3291
3292 pcm_file = file->private_data;
3293 substream = pcm_file->substream;
7eaa943c
TI		 3294 if (PCM_RUNTIME_CHECK(substream))
3295 return -ENXIO;
1da177e4
LT		 3296
3297 offset = area->vm_pgoff << PAGE_SHIFT;
3298 switch (offset) {
3299 case SNDRV_PCM_MMAP_OFFSET_STATUS:
548a648b 3300 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3301 return -ENXIO;
3302 return snd_pcm_mmap_status(substream, file, area);
3303 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
548a648b 3304 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3305 return -ENXIO;
3306 return snd_pcm_mmap_control(substream, file, area);
3307 default:
3308 return snd_pcm_mmap_data(substream, file, area);
3309 }
3310 return 0;
3311}
3312
3313static int snd_pcm_fasync(int fd, struct file * file, int on)
3314{
877211f5
TI		 3315 struct snd_pcm_file * pcm_file;
3316 struct snd_pcm_substream *substream;
3317 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3318
3319 pcm_file = file->private_data;
3320 substream = pcm_file->substream;
7eaa943c 3321 if (PCM_RUNTIME_CHECK(substream))
d05468b7 3322 return -ENXIO;
1da177e4 3323 runtime = substream->runtime;
d05468b7 3324 return fasync_helper(fd, file, on, &runtime->fasync);
1da177e4
LT		 3325}
3326
3327/*
3328 * ioctl32 compat
3329 */
3330#ifdef CONFIG_COMPAT
3331#include "pcm_compat.c"
3332#else
3333#define snd_pcm_ioctl_compat NULL
3334#endif
3335
3336/*
3337 * To be removed helpers to keep binary compatibility
3338 */
3339
59d48582 3340#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3341#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3342#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3343
877211f5
TI		 3344static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3345 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3346{
3347 unsigned int i;
3348
3349 memset(params, 0, sizeof(*params));
3350 params->flags = oparams->flags;
3351 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3352 params->masks[i].bits[0] = oparams->masks[i];
3353 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3354 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3355 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3356 params->info = oparams->info;
3357 params->msbits = oparams->msbits;
3358 params->rate_num = oparams->rate_num;
3359 params->rate_den = oparams->rate_den;
3360 params->fifo_size = oparams->fifo_size;
3361}
3362
877211f5
TI		 3363static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3364 struct snd_pcm_hw_params *params)
1da177e4
LT		 3365{
3366 unsigned int i;
3367
3368 memset(oparams, 0, sizeof(*oparams));
3369 oparams->flags = params->flags;
3370 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3371 oparams->masks[i] = params->masks[i].bits[0];
3372 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3373 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3374 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3375 oparams->info = params->info;
3376 oparams->msbits = params->msbits;
3377 oparams->rate_num = params->rate_num;
3378 oparams->rate_den = params->rate_den;
3379 oparams->fifo_size = params->fifo_size;
3380}
3381
877211f5
TI		 3382static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3383 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3384{
877211f5
TI		 3385 struct snd_pcm_hw_params *params;
3386 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3387 int err;
3388
3389 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3390 if (!params)
3391 return -ENOMEM;
1da177e4 3392
ef44a1ec
LZ		 3393 oparams = memdup_user(_oparams, sizeof(*oparams));
3394 if (IS_ERR(oparams)) {
3395 err = PTR_ERR(oparams);
1da177e4
LT		 3396 goto out;
3397 }
3398 snd_pcm_hw_convert_from_old_params(params, oparams);
3399 err = snd_pcm_hw_refine(substream, params);
3400 snd_pcm_hw_convert_to_old_params(oparams, params);
3401 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3402 if (!err)
3403 err = -EFAULT;
3404 }
ef44a1ec
LZ		 3405
3406 kfree(oparams);
1da177e4
LT		 3407out:
3408 kfree(params);
1da177e4
LT		 3409 return err;
3410}
3411
877211f5
TI		 3412static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3413 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3414{
877211f5
TI		 3415 struct snd_pcm_hw_params *params;
3416 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3417 int err;
3418
3419 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3420 if (!params)
3421 return -ENOMEM;
3422
3423 oparams = memdup_user(_oparams, sizeof(*oparams));
3424 if (IS_ERR(oparams)) {
3425 err = PTR_ERR(oparams);
1da177e4
LT		 3426 goto out;
3427 }
3428 snd_pcm_hw_convert_from_old_params(params, oparams);
3429 err = snd_pcm_hw_params(substream, params);
3430 snd_pcm_hw_convert_to_old_params(oparams, params);
3431 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3432 if (!err)
3433 err = -EFAULT;
3434 }
ef44a1ec
LZ		 3435
3436 kfree(oparams);
1da177e4
LT		 3437out:
3438 kfree(params);
1da177e4
LT		 3439 return err;
3440}
59d48582 3441#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 3442
7003609b 3443#ifndef CONFIG_MMU
55c63bd2
DG		 3444static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3445 unsigned long addr,
3446 unsigned long len,
3447 unsigned long pgoff,
3448 unsigned long flags)
3449{
3450 struct snd_pcm_file *pcm_file = file->private_data;
3451 struct snd_pcm_substream *substream = pcm_file->substream;
3452 struct snd_pcm_runtime *runtime = substream->runtime;
3453 unsigned long offset = pgoff << PAGE_SHIFT;
3454
3455 switch (offset) {
3456 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3457 return (unsigned long)runtime->status;
3458 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3459 return (unsigned long)runtime->control;
3460 default:
3461 return (unsigned long)runtime->dma_area + offset;
3462 }
7003609b
CC		 3463}
3464#else
55c63bd2 3465# define snd_pcm_get_unmapped_area NULL
7003609b
CC		 3466#endif
3467
1da177e4
LT		 3468/*
3469 * Register section
3470 */
3471
9c2e08c5 3472const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3473 {
2af677fc
CL		 3474 .owner = THIS_MODULE,
3475 .write = snd_pcm_write,
ee0b3e67 3476 .aio_write = snd_pcm_aio_write,
f87135f5 3477 .open = snd_pcm_playback_open,
2af677fc 3478 .release = snd_pcm_release,
02f4865f 3479 .llseek = no_llseek,
2af677fc
CL		 3480 .poll = snd_pcm_playback_poll,
3481 .unlocked_ioctl = snd_pcm_playback_ioctl,
3482 .compat_ioctl = snd_pcm_ioctl_compat,
3483 .mmap = snd_pcm_mmap,
3484 .fasync = snd_pcm_fasync,
55c63bd2 3485 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3486 },
3487 {
2af677fc
CL		 3488 .owner = THIS_MODULE,
3489 .read = snd_pcm_read,
ee0b3e67 3490 .aio_read = snd_pcm_aio_read,
f87135f5 3491 .open = snd_pcm_capture_open,
2af677fc 3492 .release = snd_pcm_release,
02f4865f 3493 .llseek = no_llseek,
2af677fc
CL		 3494 .poll = snd_pcm_capture_poll,
3495 .unlocked_ioctl = snd_pcm_capture_ioctl,
3496 .compat_ioctl = snd_pcm_ioctl_compat,
3497 .mmap = snd_pcm_mmap,
3498 .fasync = snd_pcm_fasync,
55c63bd2 3499 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3500 }
3501};
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