projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ALSA: core - Define llseek fops
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / core / pcm_native.c
CommitLineData
1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer
c1017a4c 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
1da177e4 22#include <linux/mm.h>
1da177e4
LT		 23#include <linux/file.h>
24#include <linux/slab.h>
2db9f0a3 25#include <linux/smp_lock.h>
1da177e4 26#include <linux/time.h>
f011e2e2 27#include <linux/pm_qos_params.h>
1da177e4 28#include <linux/uio.h>
657b1989 29#include <linux/dma-mapping.h>
7910b4a1 30#include <linux/math64.h>
1da177e4
LT		 31#include <sound/core.h>
32#include <sound/control.h>
33#include <sound/info.h>
34#include <sound/pcm.h>
35#include <sound/pcm_params.h>
36#include <sound/timer.h>
37#include <sound/minors.h>
38#include <asm/io.h>
39
40/*
41 * Compatibility
42 */
43
877211f5 44struct snd_pcm_hw_params_old {
1da177e4
LT		 45 unsigned int flags;
46 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
47 SNDRV_PCM_HW_PARAM_ACCESS + 1];
877211f5 48 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
1da177e4
LT		 49 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
50 unsigned int rmask;
51 unsigned int cmask;
52 unsigned int info;
53 unsigned int msbits;
54 unsigned int rate_num;
55 unsigned int rate_den;
877211f5 56 snd_pcm_uframes_t fifo_size;
1da177e4
LT		 57 unsigned char reserved[64];
58};
59
59d48582 60#ifdef CONFIG_SND_SUPPORT_OLD_API
877211f5
TI		 61#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
62#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
1da177e4 63
877211f5
TI		 64static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
65 struct snd_pcm_hw_params_old __user * _oparams);
66static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
67 struct snd_pcm_hw_params_old __user * _oparams);
59d48582 68#endif
f87135f5 69static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
1da177e4
LT		 70
71/*
72 *
73 */
74
75DEFINE_RWLOCK(snd_pcm_link_rwlock);
e88e8ae6 76EXPORT_SYMBOL(snd_pcm_link_rwlock);
1da177e4 77
e88e8ae6 78static DECLARE_RWSEM(snd_pcm_link_rwsem);
1da177e4
LT		 79
80static inline mm_segment_t snd_enter_user(void)
81{
82 mm_segment_t fs = get_fs();
83 set_fs(get_ds());
84 return fs;
85}
86
87static inline void snd_leave_user(mm_segment_t fs)
88{
89 set_fs(fs);
90}
91
92
93
877211f5 94int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 95{
877211f5
TI		 96 struct snd_pcm_runtime *runtime;
97 struct snd_pcm *pcm = substream->pcm;
98 struct snd_pcm_str *pstr = substream->pstr;
1da177e4 99
1da177e4
LT		 100 memset(info, 0, sizeof(*info));
101 info->card = pcm->card->number;
102 info->device = pcm->device;
103 info->stream = substream->stream;
104 info->subdevice = substream->number;
105 strlcpy(info->id, pcm->id, sizeof(info->id));
106 strlcpy(info->name, pcm->name, sizeof(info->name));
107 info->dev_class = pcm->dev_class;
108 info->dev_subclass = pcm->dev_subclass;
109 info->subdevices_count = pstr->substream_count;
110 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
111 strlcpy(info->subname, substream->name, sizeof(info->subname));
112 runtime = substream->runtime;
113 /* AB: FIXME!!! This is definitely nonsense */
114 if (runtime) {
115 info->sync = runtime->sync;
116 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
117 }
118 return 0;
119}
120
877211f5
TI		 121int snd_pcm_info_user(struct snd_pcm_substream *substream,
122 struct snd_pcm_info __user * _info)
1da177e4 123{
877211f5 124 struct snd_pcm_info *info;
1da177e4
LT		 125 int err;
126
127 info = kmalloc(sizeof(*info), GFP_KERNEL);
128 if (! info)
129 return -ENOMEM;
130 err = snd_pcm_info(substream, info);
131 if (err >= 0) {
132 if (copy_to_user(_info, info, sizeof(*info)))
133 err = -EFAULT;
134 }
135 kfree(info);
136 return err;
137}
138
139#undef RULES_DEBUG
140
141#ifdef RULES_DEBUG
142#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
143char *snd_pcm_hw_param_names[] = {
144 HW_PARAM(ACCESS),
145 HW_PARAM(FORMAT),
146 HW_PARAM(SUBFORMAT),
147 HW_PARAM(SAMPLE_BITS),
148 HW_PARAM(FRAME_BITS),
149 HW_PARAM(CHANNELS),
150 HW_PARAM(RATE),
151 HW_PARAM(PERIOD_TIME),
152 HW_PARAM(PERIOD_SIZE),
153 HW_PARAM(PERIOD_BYTES),
154 HW_PARAM(PERIODS),
155 HW_PARAM(BUFFER_TIME),
156 HW_PARAM(BUFFER_SIZE),
157 HW_PARAM(BUFFER_BYTES),
158 HW_PARAM(TICK_TIME),
159};
160#endif
161
877211f5
TI		 162int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
163 struct snd_pcm_hw_params *params)
1da177e4
LT		 164{
165 unsigned int k;
877211f5
TI		 166 struct snd_pcm_hardware *hw;
167 struct snd_interval *i = NULL;
168 struct snd_mask *m = NULL;
169 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
1da177e4
LT		 170 unsigned int rstamps[constrs->rules_num];
171 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
172 unsigned int stamp = 2;
173 int changed, again;
174
175 params->info = 0;
176 params->fifo_size = 0;
177 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
178 params->msbits = 0;
179 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
180 params->rate_num = 0;
181 params->rate_den = 0;
182 }
183
184 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
185 m = hw_param_mask(params, k);
186 if (snd_mask_empty(m))
187 return -EINVAL;
188 if (!(params->rmask & (1 << k)))
189 continue;
190#ifdef RULES_DEBUG
006de267 191 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
1da177e4
LT		 192 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
193#endif
194 changed = snd_mask_refine(m, constrs_mask(constrs, k));
195#ifdef RULES_DEBUG
196 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
197#endif
198 if (changed)
199 params->cmask |= 1 << k;
200 if (changed < 0)
201 return changed;
202 }
203
204 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
205 i = hw_param_interval(params, k);
206 if (snd_interval_empty(i))
207 return -EINVAL;
208 if (!(params->rmask & (1 << k)))
209 continue;
210#ifdef RULES_DEBUG
006de267 211 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
1da177e4
LT		 212 if (i->empty)
213 printk("empty");
214 else
215 printk("%c%u %u%c",
216 i->openmin ? '(' : '[', i->min,
217 i->max, i->openmax ? ')' : ']');
218 printk(" -> ");
219#endif
220 changed = snd_interval_refine(i, constrs_interval(constrs, k));
221#ifdef RULES_DEBUG
222 if (i->empty)
223 printk("empty\n");
224 else
225 printk("%c%u %u%c\n",
226 i->openmin ? '(' : '[', i->min,
227 i->max, i->openmax ? ')' : ']');
228#endif
229 if (changed)
230 params->cmask |= 1 << k;
231 if (changed < 0)
232 return changed;
233 }
234
235 for (k = 0; k < constrs->rules_num; k++)
236 rstamps[k] = 0;
237 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
238 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
239 do {
240 again = 0;
241 for (k = 0; k < constrs->rules_num; k++) {
877211f5 242 struct snd_pcm_hw_rule *r = &constrs->rules[k];
1da177e4
LT		 243 unsigned int d;
244 int doit = 0;
245 if (r->cond && !(r->cond & params->flags))
246 continue;
247 for (d = 0; r->deps[d] >= 0; d++) {
248 if (vstamps[r->deps[d]] > rstamps[k]) {
249 doit = 1;
250 break;
251 }
252 }
253 if (!doit)
254 continue;
255#ifdef RULES_DEBUG
006de267 256 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
1da177e4
LT		 257 if (r->var >= 0) {
258 printk("%s = ", snd_pcm_hw_param_names[r->var]);
259 if (hw_is_mask(r->var)) {
260 m = hw_param_mask(params, r->var);
261 printk("%x", *m->bits);
262 } else {
263 i = hw_param_interval(params, r->var);
264 if (i->empty)
265 printk("empty");
266 else
267 printk("%c%u %u%c",
268 i->openmin ? '(' : '[', i->min,
269 i->max, i->openmax ? ')' : ']');
270 }
271 }
272#endif
273 changed = r->func(params, r);
274#ifdef RULES_DEBUG
275 if (r->var >= 0) {
276 printk(" -> ");
277 if (hw_is_mask(r->var))
278 printk("%x", *m->bits);
279 else {
280 if (i->empty)
281 printk("empty");
282 else
283 printk("%c%u %u%c",
284 i->openmin ? '(' : '[', i->min,
285 i->max, i->openmax ? ')' : ']');
286 }
287 }
288 printk("\n");
289#endif
290 rstamps[k] = stamp;
291 if (changed && r->var >= 0) {
292 params->cmask |= (1 << r->var);
293 vstamps[r->var] = stamp;
294 again = 1;
295 }
296 if (changed < 0)
297 return changed;
298 stamp++;
299 }
300 } while (again);
301 if (!params->msbits) {
302 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
303 if (snd_interval_single(i))
304 params->msbits = snd_interval_value(i);
305 }
306
307 if (!params->rate_den) {
308 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
309 if (snd_interval_single(i)) {
310 params->rate_num = snd_interval_value(i);
311 params->rate_den = 1;
312 }
313 }
314
315 hw = &substream->runtime->hw;
316 if (!params->info)
8bea869c
JK		 317 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
318 if (!params->fifo_size) {
3be522a9
JK		 319 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
320 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
321 if (snd_mask_min(m) == snd_mask_max(m) &&
322 snd_interval_min(i) == snd_interval_max(i)) {
8bea869c
JK		 323 changed = substream->ops->ioctl(substream,
324 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
8bd9bca3 325 if (changed < 0)
8bea869c
JK		 326 return changed;
327 }
328 }
1da177e4
LT		 329 params->rmask = 0;
330 return 0;
331}
332
e88e8ae6
TI		 333EXPORT_SYMBOL(snd_pcm_hw_refine);
334
877211f5
TI		 335static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
336 struct snd_pcm_hw_params __user * _params)
1da177e4 337{
877211f5 338 struct snd_pcm_hw_params *params;
1da177e4
LT		 339 int err;
340
ef44a1ec
LZ		 341 params = memdup_user(_params, sizeof(*params));
342 if (IS_ERR(params))
343 return PTR_ERR(params);
344
1da177e4
LT		 345 err = snd_pcm_hw_refine(substream, params);
346 if (copy_to_user(_params, params, sizeof(*params))) {
347 if (!err)
348 err = -EFAULT;
349 }
ef44a1ec 350
1da177e4
LT		 351 kfree(params);
352 return err;
353}
354
9442e691
TI		 355static int period_to_usecs(struct snd_pcm_runtime *runtime)
356{
357 int usecs;
358
359 if (! runtime->rate)
360 return -1; /* invalid */
361
362 /* take 75% of period time as the deadline */
363 usecs = (750000 / runtime->rate) * runtime->period_size;
364 usecs += ((750000 % runtime->rate) * runtime->period_size) /
365 runtime->rate;
366
367 return usecs;
368}
369
7910b4a1
JK		 370static int calc_boundary(struct snd_pcm_runtime *runtime)
371{
372 u_int64_t boundary;
373
374 boundary = (u_int64_t)runtime->buffer_size *
375 (u_int64_t)runtime->period_size;
376#if BITS_PER_LONG < 64
377 /* try to find lowest common multiple for buffer and period */
378 if (boundary > LONG_MAX - runtime->buffer_size) {
379 u_int32_t remainder = -1;
380 u_int32_t divident = runtime->buffer_size;
381 u_int32_t divisor = runtime->period_size;
382 while (remainder) {
383 remainder = divident % divisor;
384 if (remainder) {
385 divident = divisor;
386 divisor = remainder;
387 }
388 }
389 boundary = div_u64(boundary, divisor);
390 if (boundary > LONG_MAX - runtime->buffer_size)
391 return -ERANGE;
392 }
393#endif
394 if (boundary == 0)
395 return -ERANGE;
396 runtime->boundary = boundary;
397 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
398 runtime->boundary *= 2;
399 return 0;
400}
401
877211f5
TI		 402static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
403 struct snd_pcm_hw_params *params)
1da177e4 404{
877211f5 405 struct snd_pcm_runtime *runtime;
9442e691 406 int err, usecs;
1da177e4
LT		 407 unsigned int bits;
408 snd_pcm_uframes_t frames;
409
7eaa943c
TI		 410 if (PCM_RUNTIME_CHECK(substream))
411 return -ENXIO;
1da177e4 412 runtime = substream->runtime;
1da177e4
LT		 413 snd_pcm_stream_lock_irq(substream);
414 switch (runtime->status->state) {
415 case SNDRV_PCM_STATE_OPEN:
416 case SNDRV_PCM_STATE_SETUP:
417 case SNDRV_PCM_STATE_PREPARED:
418 break;
419 default:
420 snd_pcm_stream_unlock_irq(substream);
421 return -EBADFD;
422 }
423 snd_pcm_stream_unlock_irq(substream);
424#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
425 if (!substream->oss.oss)
426#endif
9c323fcb 427 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 428 return -EBADFD;
429
430 params->rmask = ~0U;
431 err = snd_pcm_hw_refine(substream, params);
432 if (err < 0)
433 goto _error;
434
435 err = snd_pcm_hw_params_choose(substream, params);
436 if (err < 0)
437 goto _error;
438
439 if (substream->ops->hw_params != NULL) {
440 err = substream->ops->hw_params(substream, params);
441 if (err < 0)
442 goto _error;
443 }
444
445 runtime->access = params_access(params);
446 runtime->format = params_format(params);
447 runtime->subformat = params_subformat(params);
448 runtime->channels = params_channels(params);
449 runtime->rate = params_rate(params);
450 runtime->period_size = params_period_size(params);
451 runtime->periods = params_periods(params);
452 runtime->buffer_size = params_buffer_size(params);
1da177e4
LT		 453 runtime->info = params->info;
454 runtime->rate_num = params->rate_num;
455 runtime->rate_den = params->rate_den;
456
457 bits = snd_pcm_format_physical_width(runtime->format);
458 runtime->sample_bits = bits;
459 bits *= runtime->channels;
460 runtime->frame_bits = bits;
461 frames = 1;
462 while (bits % 8 != 0) {
463 bits *= 2;
464 frames *= 2;
465 }
466 runtime->byte_align = bits / 8;
467 runtime->min_align = frames;
468
469 /* Default sw params */
470 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
471 runtime->period_step = 1;
1da177e4 472 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 473 runtime->start_threshold = 1;
474 runtime->stop_threshold = runtime->buffer_size;
475 runtime->silence_threshold = 0;
476 runtime->silence_size = 0;
7910b4a1
JK		 477 err = calc_boundary(runtime);
478 if (err < 0)
479 goto _error;
1da177e4
LT		 480
481 snd_pcm_timer_resolution_change(substream);
482 runtime->status->state = SNDRV_PCM_STATE_SETUP;
9442e691 483
f011e2e2
MG		 484 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
485 substream->latency_id);
9442e691 486 if ((usecs = period_to_usecs(runtime)) >= 0)
f011e2e2
MG		 487 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
488 substream->latency_id, usecs);
1da177e4
LT		 489 return 0;
490 _error:
491 /* hardware might be unuseable from this time,
492 so we force application to retry to set
493 the correct hardware parameter settings */
494 runtime->status->state = SNDRV_PCM_STATE_OPEN;
495 if (substream->ops->hw_free != NULL)
496 substream->ops->hw_free(substream);
497 return err;
498}
499
877211f5
TI		 500static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
501 struct snd_pcm_hw_params __user * _params)
1da177e4 502{
877211f5 503 struct snd_pcm_hw_params *params;
1da177e4
LT		 504 int err;
505
ef44a1ec
LZ		 506 params = memdup_user(_params, sizeof(*params));
507 if (IS_ERR(params))
508 return PTR_ERR(params);
509
1da177e4
LT		 510 err = snd_pcm_hw_params(substream, params);
511 if (copy_to_user(_params, params, sizeof(*params))) {
512 if (!err)
513 err = -EFAULT;
514 }
ef44a1ec 515
1da177e4
LT		 516 kfree(params);
517 return err;
518}
519
877211f5 520static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 521{
877211f5 522 struct snd_pcm_runtime *runtime;
1da177e4
LT		 523 int result = 0;
524
7eaa943c
TI		 525 if (PCM_RUNTIME_CHECK(substream))
526 return -ENXIO;
1da177e4 527 runtime = substream->runtime;
1da177e4
LT		 528 snd_pcm_stream_lock_irq(substream);
529 switch (runtime->status->state) {
530 case SNDRV_PCM_STATE_SETUP:
531 case SNDRV_PCM_STATE_PREPARED:
532 break;
533 default:
534 snd_pcm_stream_unlock_irq(substream);
535 return -EBADFD;
536 }
537 snd_pcm_stream_unlock_irq(substream);
9c323fcb 538 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 539 return -EBADFD;
540 if (substream->ops->hw_free)
541 result = substream->ops->hw_free(substream);
542 runtime->status->state = SNDRV_PCM_STATE_OPEN;
f011e2e2
MG		 543 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
544 substream->latency_id);
1da177e4
LT		 545 return result;
546}
547
877211f5
TI		 548static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
549 struct snd_pcm_sw_params *params)
1da177e4 550{
877211f5 551 struct snd_pcm_runtime *runtime;
1250932e 552 int err;
1da177e4 553
7eaa943c
TI		 554 if (PCM_RUNTIME_CHECK(substream))
555 return -ENXIO;
1da177e4 556 runtime = substream->runtime;
1da177e4
LT		 557 snd_pcm_stream_lock_irq(substream);
558 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
559 snd_pcm_stream_unlock_irq(substream);
560 return -EBADFD;
561 }
562 snd_pcm_stream_unlock_irq(substream);
563
564 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
565 return -EINVAL;
566 if (params->avail_min == 0)
567 return -EINVAL;
1da177e4
LT		 568 if (params->silence_size >= runtime->boundary) {
569 if (params->silence_threshold != 0)
570 return -EINVAL;
571 } else {
572 if (params->silence_size > params->silence_threshold)
573 return -EINVAL;
574 if (params->silence_threshold > runtime->buffer_size)
575 return -EINVAL;
576 }
1250932e 577 err = 0;
1da177e4
LT		 578 snd_pcm_stream_lock_irq(substream);
579 runtime->tstamp_mode = params->tstamp_mode;
1da177e4
LT		 580 runtime->period_step = params->period_step;
581 runtime->control->avail_min = params->avail_min;
582 runtime->start_threshold = params->start_threshold;
583 runtime->stop_threshold = params->stop_threshold;
584 runtime->silence_threshold = params->silence_threshold;
585 runtime->silence_size = params->silence_size;
1da177e4
LT		 586 params->boundary = runtime->boundary;
587 if (snd_pcm_running(substream)) {
1da177e4
LT		 588 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
589 runtime->silence_size > 0)
590 snd_pcm_playback_silence(substream, ULONG_MAX);
1250932e 591 err = snd_pcm_update_state(substream, runtime);
1da177e4
LT		 592 }
593 snd_pcm_stream_unlock_irq(substream);
1250932e 594 return err;
1da177e4
LT		 595}
596
877211f5
TI		 597static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
598 struct snd_pcm_sw_params __user * _params)
1da177e4 599{
877211f5 600 struct snd_pcm_sw_params params;
1da177e4
LT		 601 int err;
602 if (copy_from_user(&params, _params, sizeof(params)))
603 return -EFAULT;
604 err = snd_pcm_sw_params(substream, &params);
605 if (copy_to_user(_params, &params, sizeof(params)))
606 return -EFAULT;
607 return err;
608}
609
877211f5
TI		 610int snd_pcm_status(struct snd_pcm_substream *substream,
611 struct snd_pcm_status *status)
1da177e4 612{
877211f5 613 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 614
615 snd_pcm_stream_lock_irq(substream);
616 status->state = runtime->status->state;
617 status->suspended_state = runtime->status->suspended_state;
618 if (status->state == SNDRV_PCM_STATE_OPEN)
619 goto _end;
620 status->trigger_tstamp = runtime->trigger_tstamp;
8c121586 621 if (snd_pcm_running(substream)) {
1da177e4 622 snd_pcm_update_hw_ptr(substream);
8c121586
JK		 623 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
624 status->tstamp = runtime->status->tstamp;
625 goto _tstamp_end;
626 }
627 }
a713b583 628 snd_pcm_gettime(runtime, &status->tstamp);
8c121586 629 _tstamp_end:
1da177e4
LT		 630 status->appl_ptr = runtime->control->appl_ptr;
631 status->hw_ptr = runtime->status->hw_ptr;
632 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
633 status->avail = snd_pcm_playback_avail(runtime);
634 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
4bbe1ddf 635 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1da177e4 636 status->delay = runtime->buffer_size - status->avail;
4bbe1ddf
TI		 637 status->delay += runtime->delay;
638 } else
1da177e4
LT		 639 status->delay = 0;
640 } else {
641 status->avail = snd_pcm_capture_avail(runtime);
642 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
4bbe1ddf 643 status->delay = status->avail + runtime->delay;
1da177e4
LT		 644 else
645 status->delay = 0;
646 }
647 status->avail_max = runtime->avail_max;
648 status->overrange = runtime->overrange;
649 runtime->avail_max = 0;
650 runtime->overrange = 0;
651 _end:
652 snd_pcm_stream_unlock_irq(substream);
653 return 0;
654}
655
877211f5
TI		 656static int snd_pcm_status_user(struct snd_pcm_substream *substream,
657 struct snd_pcm_status __user * _status)
1da177e4 658{
877211f5 659 struct snd_pcm_status status;
1da177e4
LT		 660 int res;
661
1da177e4
LT		 662 memset(&status, 0, sizeof(status));
663 res = snd_pcm_status(substream, &status);
664 if (res < 0)
665 return res;
666 if (copy_to_user(_status, &status, sizeof(status)))
667 return -EFAULT;
668 return 0;
669}
670
877211f5
TI		 671static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
672 struct snd_pcm_channel_info * info)
1da177e4 673{
877211f5 674 struct snd_pcm_runtime *runtime;
1da177e4
LT		 675 unsigned int channel;
676
1da177e4
LT		 677 channel = info->channel;
678 runtime = substream->runtime;
679 snd_pcm_stream_lock_irq(substream);
680 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
681 snd_pcm_stream_unlock_irq(substream);
682 return -EBADFD;
683 }
684 snd_pcm_stream_unlock_irq(substream);
685 if (channel >= runtime->channels)
686 return -EINVAL;
687 memset(info, 0, sizeof(*info));
688 info->channel = channel;
689 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
690}
691
877211f5
TI		 692static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
693 struct snd_pcm_channel_info __user * _info)
1da177e4 694{
877211f5 695 struct snd_pcm_channel_info info;
1da177e4
LT		 696 int res;
697
698 if (copy_from_user(&info, _info, sizeof(info)))
699 return -EFAULT;
700 res = snd_pcm_channel_info(substream, &info);
701 if (res < 0)
702 return res;
703 if (copy_to_user(_info, &info, sizeof(info)))
704 return -EFAULT;
705 return 0;
706}
707
877211f5 708static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 709{
877211f5 710 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 711 if (runtime->trigger_master == NULL)
712 return;
713 if (runtime->trigger_master == substream) {
b751eef1 714 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 715 } else {
716 snd_pcm_trigger_tstamp(runtime->trigger_master);
717 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
718 }
719 runtime->trigger_master = NULL;
720}
721
722struct action_ops {
877211f5
TI		 723 int (*pre_action)(struct snd_pcm_substream *substream, int state);
724 int (*do_action)(struct snd_pcm_substream *substream, int state);
725 void (*undo_action)(struct snd_pcm_substream *substream, int state);
726 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 727};
728
729/*
730 * this functions is core for handling of linked stream
731 * Note: the stream state might be changed also on failure
732 * Note2: call with calling stream lock + link lock
733 */
734static int snd_pcm_action_group(struct action_ops *ops,
877211f5 735 struct snd_pcm_substream *substream,
1da177e4
LT		 736 int state, int do_lock)
737{
877211f5
TI		 738 struct snd_pcm_substream *s = NULL;
739 struct snd_pcm_substream *s1;
1da177e4
LT		 740 int res = 0;
741
ef991b95 742 snd_pcm_group_for_each_entry(s, substream) {
1da177e4 743 if (do_lock && s != substream)
208eee2a
FD		 744 spin_lock_nested(&s->self_group.lock,
745 SINGLE_DEPTH_NESTING);
1da177e4
LT		 746 res = ops->pre_action(s, state);
747 if (res < 0)
748 goto _unlock;
749 }
ef991b95 750 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 751 res = ops->do_action(s, state);
752 if (res < 0) {
753 if (ops->undo_action) {
ef991b95 754 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 755 if (s1 == s) /* failed stream */
756 break;
757 ops->undo_action(s1, state);
758 }
759 }
760 s = NULL; /* unlock all */
761 goto _unlock;
762 }
763 }
ef991b95 764 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 765 ops->post_action(s, state);
766 }
767 _unlock:
768 if (do_lock) {
769 /* unlock streams */
ef991b95 770 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 771 if (s1 != substream)
772 spin_unlock(&s1->self_group.lock);
773 if (s1 == s) /* end */
774 break;
775 }
776 }
777 return res;
778}
779
780/*
781 * Note: call with stream lock
782 */
783static int snd_pcm_action_single(struct action_ops *ops,
877211f5 784 struct snd_pcm_substream *substream,
1da177e4
LT		 785 int state)
786{
787 int res;
788
789 res = ops->pre_action(substream, state);
790 if (res < 0)
791 return res;
792 res = ops->do_action(substream, state);
793 if (res == 0)
794 ops->post_action(substream, state);
795 else if (ops->undo_action)
796 ops->undo_action(substream, state);
797 return res;
798}
799
800/*
801 * Note: call with stream lock
802 */
803static int snd_pcm_action(struct action_ops *ops,
877211f5 804 struct snd_pcm_substream *substream,
1da177e4
LT		 805 int state)
806{
807 int res;
808
809 if (snd_pcm_stream_linked(substream)) {
810 if (!spin_trylock(&substream->group->lock)) {
811 spin_unlock(&substream->self_group.lock);
812 spin_lock(&substream->group->lock);
813 spin_lock(&substream->self_group.lock);
814 }
815 res = snd_pcm_action_group(ops, substream, state, 1);
816 spin_unlock(&substream->group->lock);
817 } else {
818 res = snd_pcm_action_single(ops, substream, state);
819 }
820 return res;
821}
822
823/*
824 * Note: don't use any locks before
825 */
826static int snd_pcm_action_lock_irq(struct action_ops *ops,
877211f5 827 struct snd_pcm_substream *substream,
1da177e4
LT		 828 int state)
829{
830 int res;
831
832 read_lock_irq(&snd_pcm_link_rwlock);
833 if (snd_pcm_stream_linked(substream)) {
834 spin_lock(&substream->group->lock);
835 spin_lock(&substream->self_group.lock);
836 res = snd_pcm_action_group(ops, substream, state, 1);
837 spin_unlock(&substream->self_group.lock);
838 spin_unlock(&substream->group->lock);
839 } else {
840 spin_lock(&substream->self_group.lock);
841 res = snd_pcm_action_single(ops, substream, state);
842 spin_unlock(&substream->self_group.lock);
843 }
844 read_unlock_irq(&snd_pcm_link_rwlock);
845 return res;
846}
847
848/*
849 */
850static int snd_pcm_action_nonatomic(struct action_ops *ops,
877211f5 851 struct snd_pcm_substream *substream,
1da177e4
LT		 852 int state)
853{
854 int res;
855
856 down_read(&snd_pcm_link_rwsem);
857 if (snd_pcm_stream_linked(substream))
858 res = snd_pcm_action_group(ops, substream, state, 0);
859 else
860 res = snd_pcm_action_single(ops, substream, state);
861 up_read(&snd_pcm_link_rwsem);
862 return res;
863}
864
865/*
866 * start callbacks
867 */
877211f5 868static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 869{
877211f5 870 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 871 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
872 return -EBADFD;
873 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
874 !snd_pcm_playback_data(substream))
875 return -EPIPE;
876 runtime->trigger_master = substream;
877 return 0;
878}
879
877211f5 880static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 881{
882 if (substream->runtime->trigger_master != substream)
883 return 0;
884 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
885}
886
877211f5 887static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 888{
889 if (substream->runtime->trigger_master == substream)
890 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
891}
892
877211f5 893static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 894{
877211f5 895 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 896 snd_pcm_trigger_tstamp(substream);
6af3fb72 897 runtime->hw_ptr_jiffies = jiffies;
1da177e4
LT		 898 runtime->status->state = state;
899 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
900 runtime->silence_size > 0)
901 snd_pcm_playback_silence(substream, ULONG_MAX);
1da177e4 902 if (substream->timer)
877211f5
TI		 903 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
904 &runtime->trigger_tstamp);
1da177e4
LT		 905}
906
907static struct action_ops snd_pcm_action_start = {
908 .pre_action = snd_pcm_pre_start,
909 .do_action = snd_pcm_do_start,
910 .undo_action = snd_pcm_undo_start,
911 .post_action = snd_pcm_post_start
912};
913
914/**
1c85cc64 915 * snd_pcm_start - start all linked streams
df8db936 916 * @substream: the PCM substream instance
1da177e4 917 */
877211f5 918int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 919{
877211f5
TI		 920 return snd_pcm_action(&snd_pcm_action_start, substream,
921 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 922}
923
924/*
925 * stop callbacks
926 */
877211f5 927static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 928{
877211f5 929 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 930 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
931 return -EBADFD;
932 runtime->trigger_master = substream;
933 return 0;
934}
935
877211f5 936static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 937{
938 if (substream->runtime->trigger_master == substream &&
939 snd_pcm_running(substream))
940 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
941 return 0; /* unconditonally stop all substreams */
942}
943
877211f5 944static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 945{
877211f5 946 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 947 if (runtime->status->state != state) {
948 snd_pcm_trigger_tstamp(substream);
949 if (substream->timer)
877211f5
TI		 950 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
951 &runtime->trigger_tstamp);
1da177e4 952 runtime->status->state = state;
1da177e4
LT		 953 }
954 wake_up(&runtime->sleep);
c91a988d 955 wake_up(&runtime->tsleep);
1da177e4
LT		 956}
957
958static struct action_ops snd_pcm_action_stop = {
959 .pre_action = snd_pcm_pre_stop,
960 .do_action = snd_pcm_do_stop,
961 .post_action = snd_pcm_post_stop
962};
963
964/**
1c85cc64 965 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 966 * @substream: the PCM substream instance
967 * @state: PCM state after stopping the stream
1da177e4 968 *
1c85cc64 969 * The state of each stream is then changed to the given state unconditionally.
1da177e4 970 */
877211f5 971int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 972{
973 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
974}
975
e88e8ae6
TI		 976EXPORT_SYMBOL(snd_pcm_stop);
977
1da177e4 978/**
1c85cc64 979 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 980 * @substream: the PCM substream
1da177e4 981 *
1c85cc64 982 * After stopping, the state is changed to SETUP.
1da177e4
LT		 983 * Unlike snd_pcm_stop(), this affects only the given stream.
984 */
877211f5 985int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 986{
877211f5
TI		 987 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
988 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 989}
990
991/*
992 * pause callbacks
993 */
877211f5 994static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 995{
877211f5 996 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 997 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
998 return -ENOSYS;
999 if (push) {
1000 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1001 return -EBADFD;
1002 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1003 return -EBADFD;
1004 runtime->trigger_master = substream;
1005 return 0;
1006}
1007
877211f5 1008static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1009{
1010 if (substream->runtime->trigger_master != substream)
1011 return 0;
6af3fb72
TI		 1012 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1013 * a delta betwen the current jiffies, this gives a large enough
1014 * delta, effectively to skip the check once.
1015 */
1016 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4
LT		 1017 return substream->ops->trigger(substream,
1018 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1019 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1020}
1021
877211f5 1022static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1023{
1024 if (substream->runtime->trigger_master == substream)
1025 substream->ops->trigger(substream,
1026 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1027 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1028}
1029
877211f5 1030static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1031{
877211f5 1032 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1033 snd_pcm_trigger_tstamp(substream);
1034 if (push) {
1035 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1036 if (substream->timer)
877211f5
TI		 1037 snd_timer_notify(substream->timer,
1038 SNDRV_TIMER_EVENT_MPAUSE,
1039 &runtime->trigger_tstamp);
1da177e4 1040 wake_up(&runtime->sleep);
c91a988d 1041 wake_up(&runtime->tsleep);
1da177e4
LT		 1042 } else {
1043 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1da177e4 1044 if (substream->timer)
877211f5
TI		 1045 snd_timer_notify(substream->timer,
1046 SNDRV_TIMER_EVENT_MCONTINUE,
1047 &runtime->trigger_tstamp);
1da177e4
LT		 1048 }
1049}
1050
1051static struct action_ops snd_pcm_action_pause = {
1052 .pre_action = snd_pcm_pre_pause,
1053 .do_action = snd_pcm_do_pause,
1054 .undo_action = snd_pcm_undo_pause,
1055 .post_action = snd_pcm_post_pause
1056};
1057
1058/*
1059 * Push/release the pause for all linked streams.
1060 */
877211f5 1061static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1062{
1063 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1064}
1065
1066#ifdef CONFIG_PM
1067/* suspend */
1068
877211f5 1069static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1070{
877211f5 1071 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1072 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1073 return -EBUSY;
1074 runtime->trigger_master = substream;
1075 return 0;
1076}
1077
877211f5 1078static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1079{
877211f5 1080 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1081 if (runtime->trigger_master != substream)
1082 return 0;
1083 if (! snd_pcm_running(substream))
1084 return 0;
1085 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1086 return 0; /* suspend unconditionally */
1087}
1088
877211f5 1089static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1090{
877211f5 1091 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1092 snd_pcm_trigger_tstamp(substream);
1093 if (substream->timer)
877211f5
TI		 1094 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1095 &runtime->trigger_tstamp);
1da177e4
LT		 1096 runtime->status->suspended_state = runtime->status->state;
1097 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1da177e4 1098 wake_up(&runtime->sleep);
c91a988d 1099 wake_up(&runtime->tsleep);
1da177e4
LT		 1100}
1101
1102static struct action_ops snd_pcm_action_suspend = {
1103 .pre_action = snd_pcm_pre_suspend,
1104 .do_action = snd_pcm_do_suspend,
1105 .post_action = snd_pcm_post_suspend
1106};
1107
1108/**
1c85cc64 1109 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1110 * @substream: the PCM substream
1da177e4 1111 *
1da177e4
LT		 1112 * After this call, all streams are changed to SUSPENDED state.
1113 */
877211f5 1114int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1115{
1116 int err;
1117 unsigned long flags;
1118
603bf524
TI		 1119 if (! substream)
1120 return 0;
1121
1da177e4
LT		 1122 snd_pcm_stream_lock_irqsave(substream, flags);
1123 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1124 snd_pcm_stream_unlock_irqrestore(substream, flags);
1125 return err;
1126}
1127
e88e8ae6
TI		 1128EXPORT_SYMBOL(snd_pcm_suspend);
1129
1da177e4 1130/**
1c85cc64 1131 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1132 * @pcm: the PCM instance
1da177e4 1133 *
1da177e4
LT		 1134 * After this call, all streams are changed to SUSPENDED state.
1135 */
877211f5 1136int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1137{
877211f5 1138 struct snd_pcm_substream *substream;
1da177e4
LT		 1139 int stream, err = 0;
1140
603bf524
TI		 1141 if (! pcm)
1142 return 0;
1143
1da177e4 1144 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1145 for (substream = pcm->streams[stream].substream;
1146 substream; substream = substream->next) {
1da177e4
LT		 1147 /* FIXME: the open/close code should lock this as well */
1148 if (substream->runtime == NULL)
1149 continue;
1150 err = snd_pcm_suspend(substream);
1151 if (err < 0 && err != -EBUSY)
1152 return err;
1153 }
1154 }
1155 return 0;
1156}
1157
e88e8ae6
TI		 1158EXPORT_SYMBOL(snd_pcm_suspend_all);
1159
1da177e4
LT		 1160/* resume */
1161
877211f5 1162static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1163{
877211f5 1164 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1165 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1166 return -ENOSYS;
1167 runtime->trigger_master = substream;
1168 return 0;
1169}
1170
877211f5 1171static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1172{
877211f5 1173 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1174 if (runtime->trigger_master != substream)
1175 return 0;
1176 /* DMA not running previously? */
1177 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1178 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1179 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1180 return 0;
1181 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1182}
1183
877211f5 1184static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1185{
1186 if (substream->runtime->trigger_master == substream &&
1187 snd_pcm_running(substream))
1188 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1189}
1190
877211f5 1191static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1192{
877211f5 1193 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1194 snd_pcm_trigger_tstamp(substream);
1195 if (substream->timer)
877211f5
TI		 1196 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1197 &runtime->trigger_tstamp);
1da177e4 1198 runtime->status->state = runtime->status->suspended_state;
1da177e4
LT		 1199}
1200
1201static struct action_ops snd_pcm_action_resume = {
1202 .pre_action = snd_pcm_pre_resume,
1203 .do_action = snd_pcm_do_resume,
1204 .undo_action = snd_pcm_undo_resume,
1205 .post_action = snd_pcm_post_resume
1206};
1207
877211f5 1208static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1209{
877211f5 1210 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1211 int res;
1212
1213 snd_power_lock(card);
cbac4b0c 1214 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1215 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1216 snd_power_unlock(card);
1217 return res;
1218}
1219
1220#else
1221
877211f5 1222static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1223{
1224 return -ENOSYS;
1225}
1226
1227#endif /* CONFIG_PM */
1228
1229/*
1230 * xrun ioctl
1231 *
1232 * Change the RUNNING stream(s) to XRUN state.
1233 */
877211f5 1234static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1235{
877211f5
TI		 1236 struct snd_card *card = substream->pcm->card;
1237 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1238 int result;
1239
1240 snd_power_lock(card);
1241 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1242 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1243 if (result < 0)
1244 goto _unlock;
1245 }
1246
1247 snd_pcm_stream_lock_irq(substream);
1248 switch (runtime->status->state) {
1249 case SNDRV_PCM_STATE_XRUN:
1250 result = 0; /* already there */
1251 break;
1252 case SNDRV_PCM_STATE_RUNNING:
1253 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1254 break;
1255 default:
1256 result = -EBADFD;
1257 }
1258 snd_pcm_stream_unlock_irq(substream);
1259 _unlock:
1260 snd_power_unlock(card);
1261 return result;
1262}
1263
1264/*
1265 * reset ioctl
1266 */
877211f5 1267static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1268{
877211f5 1269 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1270 switch (runtime->status->state) {
1271 case SNDRV_PCM_STATE_RUNNING:
1272 case SNDRV_PCM_STATE_PREPARED:
1273 case SNDRV_PCM_STATE_PAUSED:
1274 case SNDRV_PCM_STATE_SUSPENDED:
1275 return 0;
1276 default:
1277 return -EBADFD;
1278 }
1279}
1280
877211f5 1281static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1282{
877211f5 1283 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1284 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1285 if (err < 0)
1286 return err;
1da177e4 1287 runtime->hw_ptr_base = 0;
e7636925
JK		 1288 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1289 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1290 runtime->silence_start = runtime->status->hw_ptr;
1291 runtime->silence_filled = 0;
1292 return 0;
1293}
1294
877211f5 1295static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1296{
877211f5 1297 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1298 runtime->control->appl_ptr = runtime->status->hw_ptr;
1299 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1300 runtime->silence_size > 0)
1301 snd_pcm_playback_silence(substream, ULONG_MAX);
1302}
1303
1304static struct action_ops snd_pcm_action_reset = {
1305 .pre_action = snd_pcm_pre_reset,
1306 .do_action = snd_pcm_do_reset,
1307 .post_action = snd_pcm_post_reset
1308};
1309
877211f5 1310static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1311{
1312 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1313}
1314
1315/*
1316 * prepare ioctl
1317 */
0df63e44
TI		 1318/* we use the second argument for updating f_flags */
1319static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1320 int f_flags)
1da177e4 1321{
877211f5 1322 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1323 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1324 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1325 return -EBADFD;
1326 if (snd_pcm_running(substream))
1327 return -EBUSY;
0df63e44 1328 substream->f_flags = f_flags;
1da177e4
LT		 1329 return 0;
1330}
1331
877211f5 1332static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1333{
1334 int err;
1335 err = substream->ops->prepare(substream);
1336 if (err < 0)
1337 return err;
1338 return snd_pcm_do_reset(substream, 0);
1339}
1340
877211f5 1341static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1342{
877211f5 1343 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1344 runtime->control->appl_ptr = runtime->status->hw_ptr;
1345 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1346}
1347
1348static struct action_ops snd_pcm_action_prepare = {
1349 .pre_action = snd_pcm_pre_prepare,
1350 .do_action = snd_pcm_do_prepare,
1351 .post_action = snd_pcm_post_prepare
1352};
1353
1354/**
1c85cc64 1355 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1356 * @substream: the PCM substream instance
0df63e44 1357 * @file: file to refer f_flags
1da177e4 1358 */
0df63e44
TI		 1359static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1360 struct file *file)
1da177e4
LT		 1361{
1362 int res;
877211f5 1363 struct snd_card *card = substream->pcm->card;
0df63e44
TI		 1364 int f_flags;
1365
1366 if (file)
1367 f_flags = file->f_flags;
1368 else
1369 f_flags = substream->f_flags;
1da177e4
LT		 1370
1371 snd_power_lock(card);
cbac4b0c 1372 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
0df63e44
TI		 1373 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1374 substream, f_flags);
1da177e4
LT		 1375 snd_power_unlock(card);
1376 return res;
1377}
1378
1379/*
1380 * drain ioctl
1381 */
1382
877211f5 1383static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1384{
1da177e4
LT		 1385 substream->runtime->trigger_master = substream;
1386 return 0;
1387}
1388
877211f5 1389static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1390{
877211f5 1391 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1392 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1393 switch (runtime->status->state) {
1394 case SNDRV_PCM_STATE_PREPARED:
1395 /* start playback stream if possible */
1396 if (! snd_pcm_playback_empty(substream)) {
1397 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1398 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1399 }
1400 break;
1401 case SNDRV_PCM_STATE_RUNNING:
1402 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1403 break;
1404 default:
1405 break;
1406 }
1407 } else {
1408 /* stop running stream */
1409 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
b05e5787 1410 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1411 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1412 snd_pcm_do_stop(substream, new_state);
1413 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1414 }
1415 }
1416 return 0;
1417}
1418
877211f5 1419static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1420{
1421}
1422
1423static struct action_ops snd_pcm_action_drain_init = {
1424 .pre_action = snd_pcm_pre_drain_init,
1425 .do_action = snd_pcm_do_drain_init,
1426 .post_action = snd_pcm_post_drain_init
1427};
1428
877211f5 1429static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1430
1431/*
1432 * Drain the stream(s).
1433 * When the substream is linked, sync until the draining of all playback streams
1434 * is finished.
1435 * After this call, all streams are supposed to be either SETUP or DRAINING
1436 * (capture only) state.
1437 */
4cdc115f
TI		 1438static int snd_pcm_drain(struct snd_pcm_substream *substream,
1439 struct file *file)
1da177e4 1440{
877211f5
TI		 1441 struct snd_card *card;
1442 struct snd_pcm_runtime *runtime;
ef991b95 1443 struct snd_pcm_substream *s;
d3a7dcfe 1444 wait_queue_t wait;
1da177e4 1445 int result = 0;
4cdc115f 1446 int nonblock = 0;
1da177e4 1447
1da177e4
LT		 1448 card = substream->pcm->card;
1449 runtime = substream->runtime;
1450
1451 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1452 return -EBADFD;
1453
1da177e4
LT		 1454 snd_power_lock(card);
1455 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1456 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1457 if (result < 0) {
1458 snd_power_unlock(card);
1459 return result;
1460 }
1da177e4
LT		 1461 }
1462
4cdc115f
TI		 1463 if (file) {
1464 if (file->f_flags & O_NONBLOCK)
1465 nonblock = 1;
1466 } else if (substream->f_flags & O_NONBLOCK)
1467 nonblock = 1;
1468
21cb2a2e 1469 down_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1470 snd_pcm_stream_lock_irq(substream);
1471 /* resume pause */
d3a7dcfe 1472 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
21cb2a2e
TI		 1473 snd_pcm_pause(substream, 0);
1474
1475 /* pre-start/stop - all running streams are changed to DRAINING state */
1476 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
4cdc115f
TI		 1477 if (result < 0)
1478 goto unlock;
1479 /* in non-blocking, we don't wait in ioctl but let caller poll */
1480 if (nonblock) {
1481 result = -EAGAIN;
1482 goto unlock;
21cb2a2e 1483 }
1da177e4
LT		 1484
1485 for (;;) {
1486 long tout;
d3a7dcfe 1487 struct snd_pcm_runtime *to_check;
1da177e4
LT		 1488 if (signal_pending(current)) {
1489 result = -ERESTARTSYS;
1490 break;
1491 }
d3a7dcfe
TI		 1492 /* find a substream to drain */
1493 to_check = NULL;
1494 snd_pcm_group_for_each_entry(s, substream) {
1495 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1496 continue;
1497 runtime = s->runtime;
1498 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1499 to_check = runtime;
21cb2a2e 1500 break;
d3a7dcfe 1501 }
21cb2a2e 1502 }
d3a7dcfe
TI		 1503 if (!to_check)
1504 break; /* all drained */
1505 init_waitqueue_entry(&wait, current);
1506 add_wait_queue(&to_check->sleep, &wait);
1da177e4
LT		 1507 set_current_state(TASK_INTERRUPTIBLE);
1508 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1509 up_read(&snd_pcm_link_rwsem);
1da177e4
LT		 1510 snd_power_unlock(card);
1511 tout = schedule_timeout(10 * HZ);
1512 snd_power_lock(card);
d3a7dcfe 1513 down_read(&snd_pcm_link_rwsem);
1da177e4 1514 snd_pcm_stream_lock_irq(substream);
d3a7dcfe 1515 remove_wait_queue(&to_check->sleep, &wait);
1da177e4
LT		 1516 if (tout == 0) {
1517 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1518 result = -ESTRPIPE;
1519 else {
1520 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1521 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1522 result = -EIO;
1523 }
1524 break;
1525 }
1da177e4 1526 }
21cb2a2e 1527
4cdc115f 1528 unlock:
21cb2a2e 1529 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1530 up_read(&snd_pcm_link_rwsem);
1da177e4 1531 snd_power_unlock(card);
1da177e4
LT		 1532
1533 return result;
1534}
1535
1536/*
1537 * drop ioctl
1538 *
1539 * Immediately put all linked substreams into SETUP state.
1540 */
877211f5 1541static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1542{
877211f5
TI		 1543 struct snd_pcm_runtime *runtime;
1544 struct snd_card *card;
1da177e4
LT		 1545 int result = 0;
1546
7eaa943c
TI		 1547 if (PCM_RUNTIME_CHECK(substream))
1548 return -ENXIO;
1da177e4
LT		 1549 runtime = substream->runtime;
1550 card = substream->pcm->card;
1551
de1b8b93 1552 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
24e8fc49
TI		 1553 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1554 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1da177e4
LT		 1555 return -EBADFD;
1556
1da177e4
LT		 1557 snd_pcm_stream_lock_irq(substream);
1558 /* resume pause */
1559 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1560 snd_pcm_pause(substream, 0);
1561
1562 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1563 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1564 snd_pcm_stream_unlock_irq(substream);
24e8fc49 1565
1da177e4
LT		 1566 return result;
1567}
1568
1569
1570/* WARNING: Don't forget to fput back the file */
1da177e4
LT		 1571static struct file *snd_pcm_file_fd(int fd)
1572{
1573 struct file *file;
1574 struct inode *inode;
f87135f5
CL		 1575 unsigned int minor;
1576
1da177e4
LT		 1577 file = fget(fd);
1578 if (!file)
1579 return NULL;
7bc56323 1580 inode = file->f_path.dentry->d_inode;
1da177e4
LT		 1581 if (!S_ISCHR(inode->i_mode) ||
1582 imajor(inode) != snd_major) {
1583 fput(file);
1584 return NULL;
1585 }
1586 minor = iminor(inode);
f87135f5
CL		 1587 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1588 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1da177e4
LT		 1589 fput(file);
1590 return NULL;
1591 }
1592 return file;
1593}
1594
1595/*
1596 * PCM link handling
1597 */
877211f5 1598static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1599{
1600 int res = 0;
1601 struct file *file;
877211f5
TI		 1602 struct snd_pcm_file *pcm_file;
1603 struct snd_pcm_substream *substream1;
1da177e4
LT		 1604
1605 file = snd_pcm_file_fd(fd);
1606 if (!file)
1607 return -EBADFD;
1608 pcm_file = file->private_data;
1609 substream1 = pcm_file->substream;
1610 down_write(&snd_pcm_link_rwsem);
1611 write_lock_irq(&snd_pcm_link_rwlock);
1612 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1613 substream->runtime->status->state != substream1->runtime->status->state) {
1614 res = -EBADFD;
1615 goto _end;
1616 }
1617 if (snd_pcm_stream_linked(substream1)) {
1618 res = -EALREADY;
1619 goto _end;
1620 }
1621 if (!snd_pcm_stream_linked(substream)) {
877211f5 1622 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1da177e4
LT		 1623 if (substream->group == NULL) {
1624 res = -ENOMEM;
1625 goto _end;
1626 }
1627 spin_lock_init(&substream->group->lock);
1628 INIT_LIST_HEAD(&substream->group->substreams);
1629 list_add_tail(&substream->link_list, &substream->group->substreams);
1630 substream->group->count = 1;
1631 }
1632 list_add_tail(&substream1->link_list, &substream->group->substreams);
1633 substream->group->count++;
1634 substream1->group = substream->group;
1635 _end:
1636 write_unlock_irq(&snd_pcm_link_rwlock);
1637 up_write(&snd_pcm_link_rwsem);
1638 fput(file);
1639 return res;
1640}
1641
877211f5 1642static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1643{
1644 substream->group = &substream->self_group;
1645 INIT_LIST_HEAD(&substream->self_group.substreams);
1646 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1647}
1648
877211f5 1649static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 1650{
ef991b95 1651 struct snd_pcm_substream *s;
1da177e4
LT		 1652 int res = 0;
1653
1654 down_write(&snd_pcm_link_rwsem);
1655 write_lock_irq(&snd_pcm_link_rwlock);
1656 if (!snd_pcm_stream_linked(substream)) {
1657 res = -EALREADY;
1658 goto _end;
1659 }
1660 list_del(&substream->link_list);
1661 substream->group->count--;
1662 if (substream->group->count == 1) { /* detach the last stream, too */
ef991b95
TI		 1663 snd_pcm_group_for_each_entry(s, substream) {
1664 relink_to_local(s);
1da177e4
LT		 1665 break;
1666 }
1667 kfree(substream->group);
1668 }
1669 relink_to_local(substream);
1670 _end:
1671 write_unlock_irq(&snd_pcm_link_rwlock);
1672 up_write(&snd_pcm_link_rwsem);
1673 return res;
1674}
1675
1676/*
1677 * hw configurator
1678 */
877211f5
TI		 1679static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1680 struct snd_pcm_hw_rule *rule)
1da177e4 1681{
877211f5 1682 struct snd_interval t;
1da177e4
LT		 1683 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1684 hw_param_interval_c(params, rule->deps[1]), &t);
1685 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1686}
1687
877211f5
TI		 1688static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1689 struct snd_pcm_hw_rule *rule)
1da177e4 1690{
877211f5 1691 struct snd_interval t;
1da177e4
LT		 1692 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1693 hw_param_interval_c(params, rule->deps[1]), &t);
1694 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1695}
1696
877211f5
TI		 1697static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1698 struct snd_pcm_hw_rule *rule)
1da177e4 1699{
877211f5 1700 struct snd_interval t;
1da177e4
LT		 1701 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1702 hw_param_interval_c(params, rule->deps[1]),
1703 (unsigned long) rule->private, &t);
1704 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1705}
1706
877211f5
TI		 1707static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1708 struct snd_pcm_hw_rule *rule)
1da177e4 1709{
877211f5 1710 struct snd_interval t;
1da177e4
LT		 1711 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1712 (unsigned long) rule->private,
1713 hw_param_interval_c(params, rule->deps[1]), &t);
1714 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1715}
1716
877211f5
TI		 1717static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1718 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1719{
1720 unsigned int k;
877211f5
TI		 1721 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1722 struct snd_mask m;
1723 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1724 snd_mask_any(&m);
1725 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1726 int bits;
1727 if (! snd_mask_test(mask, k))
1728 continue;
1729 bits = snd_pcm_format_physical_width(k);
1730 if (bits <= 0)
1731 continue; /* ignore invalid formats */
1732 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1733 snd_mask_reset(&m, k);
1734 }
1735 return snd_mask_refine(mask, &m);
1736}
1737
877211f5
TI		 1738static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1739 struct snd_pcm_hw_rule *rule)
1da177e4 1740{
877211f5 1741 struct snd_interval t;
1da177e4
LT		 1742 unsigned int k;
1743 t.min = UINT_MAX;
1744 t.max = 0;
1745 t.openmin = 0;
1746 t.openmax = 0;
1747 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1748 int bits;
1749 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1750 continue;
1751 bits = snd_pcm_format_physical_width(k);
1752 if (bits <= 0)
1753 continue; /* ignore invalid formats */
1754 if (t.min > (unsigned)bits)
1755 t.min = bits;
1756 if (t.max < (unsigned)bits)
1757 t.max = bits;
1758 }
1759 t.integer = 1;
1760 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1761}
1762
1763#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1764#error "Change this table"
1765#endif
1766
1767static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1768 48000, 64000, 88200, 96000, 176400, 192000 };
1769
7653d557
CL		 1770const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1771 .count = ARRAY_SIZE(rates),
1772 .list = rates,
1773};
1774
877211f5
TI		 1775static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1776 struct snd_pcm_hw_rule *rule)
1da177e4 1777{
877211f5 1778 struct snd_pcm_hardware *hw = rule->private;
1da177e4 1779 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 1780 snd_pcm_known_rates.count,
1781 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 1782}
1783
877211f5
TI		 1784static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1785 struct snd_pcm_hw_rule *rule)
1da177e4 1786{
877211f5
TI		 1787 struct snd_interval t;
1788 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 1789 t.min = 0;
1790 t.max = substream->buffer_bytes_max;
1791 t.openmin = 0;
1792 t.openmax = 0;
1793 t.integer = 1;
1794 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1795}
1796
877211f5 1797int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 1798{
877211f5
TI		 1799 struct snd_pcm_runtime *runtime = substream->runtime;
1800 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 1801 int k, err;
1802
1803 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1804 snd_mask_any(constrs_mask(constrs, k));
1805 }
1806
1807 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1808 snd_interval_any(constrs_interval(constrs, k));
1809 }
1810
1811 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1812 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1813 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1814 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1815 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1816
1817 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1818 snd_pcm_hw_rule_format, NULL,
1819 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1820 if (err < 0)
1821 return err;
1822 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1823 snd_pcm_hw_rule_sample_bits, NULL,
1824 SNDRV_PCM_HW_PARAM_FORMAT,
1825 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1826 if (err < 0)
1827 return err;
1828 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1829 snd_pcm_hw_rule_div, NULL,
1830 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1831 if (err < 0)
1832 return err;
1833 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1834 snd_pcm_hw_rule_mul, NULL,
1835 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1836 if (err < 0)
1837 return err;
1838 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1839 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1840 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1841 if (err < 0)
1842 return err;
1843 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1844 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1845 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1846 if (err < 0)
1847 return err;
1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1849 snd_pcm_hw_rule_div, NULL,
1850 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1851 if (err < 0)
1852 return err;
1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1854 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1855 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1856 if (err < 0)
1857 return err;
1858 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1859 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1860 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1861 if (err < 0)
1862 return err;
1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1864 snd_pcm_hw_rule_div, NULL,
1865 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1866 if (err < 0)
1867 return err;
1868 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1869 snd_pcm_hw_rule_div, NULL,
1870 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1871 if (err < 0)
1872 return err;
1873 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1874 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1875 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1876 if (err < 0)
1877 return err;
1878 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1879 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1880 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1881 if (err < 0)
1882 return err;
1883 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1884 snd_pcm_hw_rule_mul, NULL,
1885 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1886 if (err < 0)
1887 return err;
1888 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1889 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1890 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1891 if (err < 0)
1892 return err;
1893 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1894 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1895 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1896 if (err < 0)
1897 return err;
1898 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1899 snd_pcm_hw_rule_muldivk, (void*) 8,
1900 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1901 if (err < 0)
1902 return err;
1903 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1904 snd_pcm_hw_rule_muldivk, (void*) 8,
1905 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1906 if (err < 0)
1907 return err;
1908 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1909 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1910 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1911 if (err < 0)
1912 return err;
1913 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1914 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1915 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1916 if (err < 0)
1917 return err;
1918 return 0;
1919}
1920
877211f5 1921int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 1922{
877211f5
TI		 1923 struct snd_pcm_runtime *runtime = substream->runtime;
1924 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 1925 int err;
1926 unsigned int mask = 0;
1927
1928 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1929 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1930 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1931 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1932 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1933 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1934 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1935 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1936 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1937 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1938 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1939 }
1940 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 1941 if (err < 0)
1942 return err;
1da177e4
LT		 1943
1944 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 1945 if (err < 0)
1946 return err;
1da177e4
LT		 1947
1948 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
7eaa943c
TI		 1949 if (err < 0)
1950 return err;
1da177e4
LT		 1951
1952 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1953 hw->channels_min, hw->channels_max);
7eaa943c
TI		 1954 if (err < 0)
1955 return err;
1da177e4
LT		 1956
1957 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1958 hw->rate_min, hw->rate_max);
8b90ca08
GL		 1959 if (err < 0)
1960 return err;
1da177e4
LT		 1961
1962 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1963 hw->period_bytes_min, hw->period_bytes_max);
8b90ca08
GL		 1964 if (err < 0)
1965 return err;
1da177e4
LT		 1966
1967 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1968 hw->periods_min, hw->periods_max);
7eaa943c
TI		 1969 if (err < 0)
1970 return err;
1da177e4
LT		 1971
1972 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1973 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 1974 if (err < 0)
1975 return err;
1da177e4
LT		 1976
1977 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1978 snd_pcm_hw_rule_buffer_bytes_max, substream,
1979 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1980 if (err < 0)
1981 return err;
1982
1983 /* FIXME: remove */
1984 if (runtime->dma_bytes) {
1985 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c
TI		 1986 if (err < 0)
1987 return -EINVAL;
1da177e4
LT		 1988 }
1989
1990 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1991 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1992 snd_pcm_hw_rule_rate, hw,
1993 SNDRV_PCM_HW_PARAM_RATE, -1);
1994 if (err < 0)
1995 return err;
1996 }
1997
1998 /* FIXME: this belong to lowlevel */
1da177e4
LT		 1999 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2000
2001 return 0;
2002}
2003
3bf75f9b 2004static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 2005{
1da177e4 2006 snd_pcm_unlink(substream);
3bf75f9b
TI		 2007}
2008
2009void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2010{
0df63e44
TI		 2011 substream->ref_count--;
2012 if (substream->ref_count > 0)
2013 return;
2014
3bf75f9b 2015 snd_pcm_drop(substream);
3bf75f9b 2016 if (substream->hw_opened) {
1da177e4
LT		 2017 if (substream->ops->hw_free != NULL)
2018 substream->ops->hw_free(substream);
2019 substream->ops->close(substream);
3bf75f9b 2020 substream->hw_opened = 0;
1da177e4 2021 }
1576274d
TI		 2022 if (substream->pcm_release) {
2023 substream->pcm_release(substream);
2024 substream->pcm_release = NULL;
2025 }
3bf75f9b
TI		 2026 snd_pcm_detach_substream(substream);
2027}
2028
e88e8ae6
TI		 2029EXPORT_SYMBOL(snd_pcm_release_substream);
2030
3bf75f9b
TI		 2031int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2032 struct file *file,
2033 struct snd_pcm_substream **rsubstream)
2034{
2035 struct snd_pcm_substream *substream;
2036 int err;
2037
2038 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2039 if (err < 0)
2040 return err;
0df63e44
TI		 2041 if (substream->ref_count > 1) {
2042 *rsubstream = substream;
2043 return 0;
2044 }
2045
3bf75f9b
TI		 2046 err = snd_pcm_hw_constraints_init(substream);
2047 if (err < 0) {
2048 snd_printd("snd_pcm_hw_constraints_init failed\n");
2049 goto error;
2050 }
2051
2052 if ((err = substream->ops->open(substream)) < 0)
2053 goto error;
2054
2055 substream->hw_opened = 1;
2056
2057 err = snd_pcm_hw_constraints_complete(substream);
2058 if (err < 0) {
2059 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2060 goto error;
2061 }
2062
2063 *rsubstream = substream;
1da177e4 2064 return 0;
3bf75f9b
TI		 2065
2066 error:
2067 snd_pcm_release_substream(substream);
2068 return err;
1da177e4
LT		 2069}
2070
e88e8ae6
TI		 2071EXPORT_SYMBOL(snd_pcm_open_substream);
2072
1da177e4 2073static int snd_pcm_open_file(struct file *file,
877211f5 2074 struct snd_pcm *pcm,
1da177e4 2075 int stream,
877211f5 2076 struct snd_pcm_file **rpcm_file)
1da177e4 2077{
877211f5
TI		 2078 struct snd_pcm_file *pcm_file;
2079 struct snd_pcm_substream *substream;
2080 struct snd_pcm_str *str;
3bf75f9b 2081 int err;
1da177e4 2082
7eaa943c
TI		 2083 if (rpcm_file)
2084 *rpcm_file = NULL;
1da177e4 2085
3bf75f9b
TI		 2086 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2087 if (err < 0)
2088 return err;
2089
548a648b
TI		 2090 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2091 if (pcm_file == NULL) {
2092 snd_pcm_release_substream(substream);
2093 return -ENOMEM;
2094 }
2095 pcm_file->substream = substream;
2096 if (substream->ref_count == 1) {
0df63e44
TI		 2097 str = substream->pstr;
2098 substream->file = pcm_file;
2099 substream->pcm_release = pcm_release_private;
1da177e4 2100 }
1da177e4 2101 file->private_data = pcm_file;
7eaa943c
TI		 2102 if (rpcm_file)
2103 *rpcm_file = pcm_file;
1da177e4
LT		 2104 return 0;
2105}
2106
f87135f5
CL		 2107static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2108{
2109 struct snd_pcm *pcm;
02f4865f
TI		 2110 int err = nonseekable_open(inode, file);
2111 if (err < 0)
2112 return err;
f87135f5
CL		 2113 pcm = snd_lookup_minor_data(iminor(inode),
2114 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2115 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2116}
2117
2118static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2119{
877211f5 2120 struct snd_pcm *pcm;
02f4865f
TI		 2121 int err = nonseekable_open(inode, file);
2122 if (err < 0)
2123 return err;
f87135f5
CL		 2124 pcm = snd_lookup_minor_data(iminor(inode),
2125 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2126 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2127}
2128
2129static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2130{
2131 int err;
877211f5 2132 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2133 wait_queue_t wait;
2134
1da177e4
LT		 2135 if (pcm == NULL) {
2136 err = -ENODEV;
2137 goto __error1;
2138 }
2139 err = snd_card_file_add(pcm->card, file);
2140 if (err < 0)
2141 goto __error1;
2142 if (!try_module_get(pcm->card->module)) {
2143 err = -EFAULT;
2144 goto __error2;
2145 }
2146 init_waitqueue_entry(&wait, current);
2147 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2148 mutex_lock(&pcm->open_mutex);
1da177e4 2149 while (1) {
f87135f5 2150 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
1da177e4
LT		 2151 if (err >= 0)
2152 break;
2153 if (err == -EAGAIN) {
2154 if (file->f_flags & O_NONBLOCK) {
2155 err = -EBUSY;
2156 break;
2157 }
2158 } else
2159 break;
2160 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2161 mutex_unlock(&pcm->open_mutex);
1da177e4 2162 schedule();
1a60d4c5 2163 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2164 if (signal_pending(current)) {
2165 err = -ERESTARTSYS;
2166 break;
2167 }
2168 }
2169 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2170 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2171 if (err < 0)
2172 goto __error;
2173 return err;
2174
2175 __error:
2176 module_put(pcm->card->module);
2177 __error2:
2178 snd_card_file_remove(pcm->card, file);
2179 __error1:
2180 return err;
2181}
2182
2183static int snd_pcm_release(struct inode *inode, struct file *file)
2184{
877211f5
TI		 2185 struct snd_pcm *pcm;
2186 struct snd_pcm_substream *substream;
2187 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2188
2189 pcm_file = file->private_data;
2190 substream = pcm_file->substream;
7eaa943c
TI		 2191 if (snd_BUG_ON(!substream))
2192 return -ENXIO;
1da177e4 2193 pcm = substream->pcm;
1a60d4c5 2194 mutex_lock(&pcm->open_mutex);
3bf75f9b 2195 snd_pcm_release_substream(substream);
548a648b 2196 kfree(pcm_file);
1a60d4c5 2197 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2198 wake_up(&pcm->open_wait);
2199 module_put(pcm->card->module);
2200 snd_card_file_remove(pcm->card, file);
2201 return 0;
2202}
2203
877211f5
TI		 2204static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2205 snd_pcm_uframes_t frames)
1da177e4 2206{
877211f5 2207 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2208 snd_pcm_sframes_t appl_ptr;
2209 snd_pcm_sframes_t ret;
2210 snd_pcm_sframes_t hw_avail;
2211
2212 if (frames == 0)
2213 return 0;
2214
2215 snd_pcm_stream_lock_irq(substream);
2216 switch (runtime->status->state) {
2217 case SNDRV_PCM_STATE_PREPARED:
2218 break;
2219 case SNDRV_PCM_STATE_DRAINING:
2220 case SNDRV_PCM_STATE_RUNNING:
2221 if (snd_pcm_update_hw_ptr(substream) >= 0)
2222 break;
2223 /* Fall through */
2224 case SNDRV_PCM_STATE_XRUN:
2225 ret = -EPIPE;
2226 goto __end;
51840409
LR		 2227 case SNDRV_PCM_STATE_SUSPENDED:
2228 ret = -ESTRPIPE;
2229 goto __end;
1da177e4
LT		 2230 default:
2231 ret = -EBADFD;
2232 goto __end;
2233 }
2234
2235 hw_avail = snd_pcm_playback_hw_avail(runtime);
2236 if (hw_avail <= 0) {
2237 ret = 0;
2238 goto __end;
2239 }
2240 if (frames > (snd_pcm_uframes_t)hw_avail)
2241 frames = hw_avail;
1da177e4
LT		 2242 appl_ptr = runtime->control->appl_ptr - frames;
2243 if (appl_ptr < 0)
2244 appl_ptr += runtime->boundary;
2245 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2246 ret = frames;
2247 __end:
2248 snd_pcm_stream_unlock_irq(substream);
2249 return ret;
2250}
2251
877211f5
TI		 2252static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2253 snd_pcm_uframes_t frames)
1da177e4 2254{
877211f5 2255 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2256 snd_pcm_sframes_t appl_ptr;
2257 snd_pcm_sframes_t ret;
2258 snd_pcm_sframes_t hw_avail;
2259
2260 if (frames == 0)
2261 return 0;
2262
2263 snd_pcm_stream_lock_irq(substream);
2264 switch (runtime->status->state) {
2265 case SNDRV_PCM_STATE_PREPARED:
2266 case SNDRV_PCM_STATE_DRAINING:
2267 break;
2268 case SNDRV_PCM_STATE_RUNNING:
2269 if (snd_pcm_update_hw_ptr(substream) >= 0)
2270 break;
2271 /* Fall through */
2272 case SNDRV_PCM_STATE_XRUN:
2273 ret = -EPIPE;
2274 goto __end;
51840409
LR		 2275 case SNDRV_PCM_STATE_SUSPENDED:
2276 ret = -ESTRPIPE;
2277 goto __end;
1da177e4
LT		 2278 default:
2279 ret = -EBADFD;
2280 goto __end;
2281 }
2282
2283 hw_avail = snd_pcm_capture_hw_avail(runtime);
2284 if (hw_avail <= 0) {
2285 ret = 0;
2286 goto __end;
2287 }
2288 if (frames > (snd_pcm_uframes_t)hw_avail)
2289 frames = hw_avail;
1da177e4
LT		 2290 appl_ptr = runtime->control->appl_ptr - frames;
2291 if (appl_ptr < 0)
2292 appl_ptr += runtime->boundary;
2293 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2294 ret = frames;
2295 __end:
2296 snd_pcm_stream_unlock_irq(substream);
2297 return ret;
2298}
2299
877211f5
TI		 2300static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2301 snd_pcm_uframes_t frames)
1da177e4 2302{
877211f5 2303 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2304 snd_pcm_sframes_t appl_ptr;
2305 snd_pcm_sframes_t ret;
2306 snd_pcm_sframes_t avail;
2307
2308 if (frames == 0)
2309 return 0;
2310
2311 snd_pcm_stream_lock_irq(substream);
2312 switch (runtime->status->state) {
2313 case SNDRV_PCM_STATE_PREPARED:
2314 case SNDRV_PCM_STATE_PAUSED:
2315 break;
2316 case SNDRV_PCM_STATE_DRAINING:
2317 case SNDRV_PCM_STATE_RUNNING:
2318 if (snd_pcm_update_hw_ptr(substream) >= 0)
2319 break;
2320 /* Fall through */
2321 case SNDRV_PCM_STATE_XRUN:
2322 ret = -EPIPE;
2323 goto __end;
51840409
LR		 2324 case SNDRV_PCM_STATE_SUSPENDED:
2325 ret = -ESTRPIPE;
2326 goto __end;
1da177e4
LT		 2327 default:
2328 ret = -EBADFD;
2329 goto __end;
2330 }
2331
2332 avail = snd_pcm_playback_avail(runtime);
2333 if (avail <= 0) {
2334 ret = 0;
2335 goto __end;
2336 }
2337 if (frames > (snd_pcm_uframes_t)avail)
2338 frames = avail;
1da177e4
LT		 2339 appl_ptr = runtime->control->appl_ptr + frames;
2340 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2341 appl_ptr -= runtime->boundary;
2342 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2343 ret = frames;
2344 __end:
2345 snd_pcm_stream_unlock_irq(substream);
2346 return ret;
2347}
2348
877211f5
TI		 2349static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2350 snd_pcm_uframes_t frames)
1da177e4 2351{
877211f5 2352 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2353 snd_pcm_sframes_t appl_ptr;
2354 snd_pcm_sframes_t ret;
2355 snd_pcm_sframes_t avail;
2356
2357 if (frames == 0)
2358 return 0;
2359
2360 snd_pcm_stream_lock_irq(substream);
2361 switch (runtime->status->state) {
2362 case SNDRV_PCM_STATE_PREPARED:
2363 case SNDRV_PCM_STATE_DRAINING:
2364 case SNDRV_PCM_STATE_PAUSED:
2365 break;
2366 case SNDRV_PCM_STATE_RUNNING:
2367 if (snd_pcm_update_hw_ptr(substream) >= 0)
2368 break;
2369 /* Fall through */
2370 case SNDRV_PCM_STATE_XRUN:
2371 ret = -EPIPE;
2372 goto __end;
51840409
LR		 2373 case SNDRV_PCM_STATE_SUSPENDED:
2374 ret = -ESTRPIPE;
2375 goto __end;
1da177e4
LT		 2376 default:
2377 ret = -EBADFD;
2378 goto __end;
2379 }
2380
2381 avail = snd_pcm_capture_avail(runtime);
2382 if (avail <= 0) {
2383 ret = 0;
2384 goto __end;
2385 }
2386 if (frames > (snd_pcm_uframes_t)avail)
2387 frames = avail;
1da177e4
LT		 2388 appl_ptr = runtime->control->appl_ptr + frames;
2389 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2390 appl_ptr -= runtime->boundary;
2391 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2392 ret = frames;
2393 __end:
2394 snd_pcm_stream_unlock_irq(substream);
2395 return ret;
2396}
2397
877211f5 2398static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2399{
877211f5 2400 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2401 int err;
2402
2403 snd_pcm_stream_lock_irq(substream);
2404 switch (runtime->status->state) {
2405 case SNDRV_PCM_STATE_DRAINING:
2406 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2407 goto __badfd;
2408 case SNDRV_PCM_STATE_RUNNING:
2409 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2410 break;
2411 /* Fall through */
2412 case SNDRV_PCM_STATE_PREPARED:
2413 case SNDRV_PCM_STATE_SUSPENDED:
2414 err = 0;
2415 break;
2416 case SNDRV_PCM_STATE_XRUN:
2417 err = -EPIPE;
2418 break;
2419 default:
2420 __badfd:
2421 err = -EBADFD;
2422 break;
2423 }
2424 snd_pcm_stream_unlock_irq(substream);
2425 return err;
2426}
2427
877211f5
TI		 2428static int snd_pcm_delay(struct snd_pcm_substream *substream,
2429 snd_pcm_sframes_t __user *res)
1da177e4 2430{
877211f5 2431 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2432 int err;
2433 snd_pcm_sframes_t n = 0;
2434
2435 snd_pcm_stream_lock_irq(substream);
2436 switch (runtime->status->state) {
2437 case SNDRV_PCM_STATE_DRAINING:
2438 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2439 goto __badfd;
2440 case SNDRV_PCM_STATE_RUNNING:
2441 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2442 break;
2443 /* Fall through */
2444 case SNDRV_PCM_STATE_PREPARED:
2445 case SNDRV_PCM_STATE_SUSPENDED:
2446 err = 0;
2447 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2448 n = snd_pcm_playback_hw_avail(runtime);
2449 else
2450 n = snd_pcm_capture_avail(runtime);
4bbe1ddf 2451 n += runtime->delay;
1da177e4
LT		 2452 break;
2453 case SNDRV_PCM_STATE_XRUN:
2454 err = -EPIPE;
2455 break;
2456 default:
2457 __badfd:
2458 err = -EBADFD;
2459 break;
2460 }
2461 snd_pcm_stream_unlock_irq(substream);
2462 if (!err)
2463 if (put_user(n, res))
2464 err = -EFAULT;
2465 return err;
2466}
2467
877211f5
TI		 2468static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2469 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2470{
877211f5
TI		 2471 struct snd_pcm_runtime *runtime = substream->runtime;
2472 struct snd_pcm_sync_ptr sync_ptr;
2473 volatile struct snd_pcm_mmap_status *status;
2474 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2475 int err;
2476
2477 memset(&sync_ptr, 0, sizeof(sync_ptr));
2478 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2479 return -EFAULT;
877211f5 2480 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2481 return -EFAULT;
2482 status = runtime->status;
2483 control = runtime->control;
2484 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2485 err = snd_pcm_hwsync(substream);
2486 if (err < 0)
2487 return err;
2488 }
2489 snd_pcm_stream_lock_irq(substream);
2490 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2491 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2492 else
2493 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2494 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2495 control->avail_min = sync_ptr.c.control.avail_min;
2496 else
2497 sync_ptr.c.control.avail_min = control->avail_min;
2498 sync_ptr.s.status.state = status->state;
2499 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2500 sync_ptr.s.status.tstamp = status->tstamp;
2501 sync_ptr.s.status.suspended_state = status->suspended_state;
2502 snd_pcm_stream_unlock_irq(substream);
2503 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2504 return -EFAULT;
2505 return 0;
2506}
b751eef1
JK		 2507
2508static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2509{
2510 struct snd_pcm_runtime *runtime = substream->runtime;
2511 int arg;
2512
2513 if (get_user(arg, _arg))
2514 return -EFAULT;
2515 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2516 return -EINVAL;
2517 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2518 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2519 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2520 return 0;
2521}
1da177e4 2522
0df63e44
TI		 2523static int snd_pcm_common_ioctl1(struct file *file,
2524 struct snd_pcm_substream *substream,
1da177e4
LT		 2525 unsigned int cmd, void __user *arg)
2526{
1da177e4
LT		 2527 switch (cmd) {
2528 case SNDRV_PCM_IOCTL_PVERSION:
2529 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2530 case SNDRV_PCM_IOCTL_INFO:
2531 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 2532 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2533 return 0;
b751eef1
JK		 2534 case SNDRV_PCM_IOCTL_TTSTAMP:
2535 return snd_pcm_tstamp(substream, arg);
1da177e4
LT		 2536 case SNDRV_PCM_IOCTL_HW_REFINE:
2537 return snd_pcm_hw_refine_user(substream, arg);
2538 case SNDRV_PCM_IOCTL_HW_PARAMS:
2539 return snd_pcm_hw_params_user(substream, arg);
2540 case SNDRV_PCM_IOCTL_HW_FREE:
2541 return snd_pcm_hw_free(substream);
2542 case SNDRV_PCM_IOCTL_SW_PARAMS:
2543 return snd_pcm_sw_params_user(substream, arg);
2544 case SNDRV_PCM_IOCTL_STATUS:
2545 return snd_pcm_status_user(substream, arg);
2546 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2547 return snd_pcm_channel_info_user(substream, arg);
2548 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2549 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2550 case SNDRV_PCM_IOCTL_RESET:
2551 return snd_pcm_reset(substream);
2552 case SNDRV_PCM_IOCTL_START:
2553 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2554 case SNDRV_PCM_IOCTL_LINK:
2555 return snd_pcm_link(substream, (int)(unsigned long) arg);
2556 case SNDRV_PCM_IOCTL_UNLINK:
2557 return snd_pcm_unlink(substream);
2558 case SNDRV_PCM_IOCTL_RESUME:
2559 return snd_pcm_resume(substream);
2560 case SNDRV_PCM_IOCTL_XRUN:
2561 return snd_pcm_xrun(substream);
2562 case SNDRV_PCM_IOCTL_HWSYNC:
2563 return snd_pcm_hwsync(substream);
2564 case SNDRV_PCM_IOCTL_DELAY:
2565 return snd_pcm_delay(substream, arg);
2566 case SNDRV_PCM_IOCTL_SYNC_PTR:
2567 return snd_pcm_sync_ptr(substream, arg);
59d48582 2568#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2569 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2570 return snd_pcm_hw_refine_old_user(substream, arg);
2571 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2572 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2573#endif
1da177e4 2574 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 2575 return snd_pcm_drain(substream, file);
1da177e4
LT		 2576 case SNDRV_PCM_IOCTL_DROP:
2577 return snd_pcm_drop(substream);
e661d0dd
TI		 2578 case SNDRV_PCM_IOCTL_PAUSE:
2579 {
2580 int res;
2581 snd_pcm_stream_lock_irq(substream);
2582 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2583 snd_pcm_stream_unlock_irq(substream);
2584 return res;
2585 }
1da177e4
LT		 2586 }
2587 snd_printd("unknown ioctl = 0x%x\n", cmd);
2588 return -ENOTTY;
2589}
2590
0df63e44
TI		 2591static int snd_pcm_playback_ioctl1(struct file *file,
2592 struct snd_pcm_substream *substream,
1da177e4
LT		 2593 unsigned int cmd, void __user *arg)
2594{
7eaa943c
TI		 2595 if (snd_BUG_ON(!substream))
2596 return -ENXIO;
2597 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2598 return -EINVAL;
1da177e4
LT		 2599 switch (cmd) {
2600 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2601 {
877211f5
TI		 2602 struct snd_xferi xferi;
2603 struct snd_xferi __user *_xferi = arg;
2604 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2605 snd_pcm_sframes_t result;
2606 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2607 return -EBADFD;
2608 if (put_user(0, &_xferi->result))
2609 return -EFAULT;
2610 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2611 return -EFAULT;
2612 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2613 __put_user(result, &_xferi->result);
2614 return result < 0 ? result : 0;
2615 }
2616 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2617 {
877211f5
TI		 2618 struct snd_xfern xfern;
2619 struct snd_xfern __user *_xfern = arg;
2620 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2621 void __user **bufs;
2622 snd_pcm_sframes_t result;
2623 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2624 return -EBADFD;
2625 if (runtime->channels > 128)
2626 return -EINVAL;
2627 if (put_user(0, &_xfern->result))
2628 return -EFAULT;
2629 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2630 return -EFAULT;
ef44a1ec
LZ		 2631
2632 bufs = memdup_user(xfern.bufs,
2633 sizeof(void *) * runtime->channels);
2634 if (IS_ERR(bufs))
2635 return PTR_ERR(bufs);
1da177e4
LT		 2636 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2637 kfree(bufs);
2638 __put_user(result, &_xfern->result);
2639 return result < 0 ? result : 0;
2640 }
2641 case SNDRV_PCM_IOCTL_REWIND:
2642 {
2643 snd_pcm_uframes_t frames;
2644 snd_pcm_uframes_t __user *_frames = arg;
2645 snd_pcm_sframes_t result;
2646 if (get_user(frames, _frames))
2647 return -EFAULT;
2648 if (put_user(0, _frames))
2649 return -EFAULT;
2650 result = snd_pcm_playback_rewind(substream, frames);
2651 __put_user(result, _frames);
2652 return result < 0 ? result : 0;
2653 }
2654 case SNDRV_PCM_IOCTL_FORWARD:
2655 {
2656 snd_pcm_uframes_t frames;
2657 snd_pcm_uframes_t __user *_frames = arg;
2658 snd_pcm_sframes_t result;
2659 if (get_user(frames, _frames))
2660 return -EFAULT;
2661 if (put_user(0, _frames))
2662 return -EFAULT;
2663 result = snd_pcm_playback_forward(substream, frames);
2664 __put_user(result, _frames);
2665 return result < 0 ? result : 0;
2666 }
1da177e4 2667 }
0df63e44 2668 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2669}
2670
0df63e44
TI		 2671static int snd_pcm_capture_ioctl1(struct file *file,
2672 struct snd_pcm_substream *substream,
1da177e4
LT		 2673 unsigned int cmd, void __user *arg)
2674{
7eaa943c
TI		 2675 if (snd_BUG_ON(!substream))
2676 return -ENXIO;
2677 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2678 return -EINVAL;
1da177e4
LT		 2679 switch (cmd) {
2680 case SNDRV_PCM_IOCTL_READI_FRAMES:
2681 {
877211f5
TI		 2682 struct snd_xferi xferi;
2683 struct snd_xferi __user *_xferi = arg;
2684 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2685 snd_pcm_sframes_t result;
2686 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2687 return -EBADFD;
2688 if (put_user(0, &_xferi->result))
2689 return -EFAULT;
2690 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2691 return -EFAULT;
2692 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2693 __put_user(result, &_xferi->result);
2694 return result < 0 ? result : 0;
2695 }
2696 case SNDRV_PCM_IOCTL_READN_FRAMES:
2697 {
877211f5
TI		 2698 struct snd_xfern xfern;
2699 struct snd_xfern __user *_xfern = arg;
2700 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2701 void *bufs;
2702 snd_pcm_sframes_t result;
2703 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2704 return -EBADFD;
2705 if (runtime->channels > 128)
2706 return -EINVAL;
2707 if (put_user(0, &_xfern->result))
2708 return -EFAULT;
2709 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2710 return -EFAULT;
ef44a1ec
LZ		 2711
2712 bufs = memdup_user(xfern.bufs,
2713 sizeof(void *) * runtime->channels);
2714 if (IS_ERR(bufs))
2715 return PTR_ERR(bufs);
1da177e4
LT		 2716 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2717 kfree(bufs);
2718 __put_user(result, &_xfern->result);
2719 return result < 0 ? result : 0;
2720 }
2721 case SNDRV_PCM_IOCTL_REWIND:
2722 {
2723 snd_pcm_uframes_t frames;
2724 snd_pcm_uframes_t __user *_frames = arg;
2725 snd_pcm_sframes_t result;
2726 if (get_user(frames, _frames))
2727 return -EFAULT;
2728 if (put_user(0, _frames))
2729 return -EFAULT;
2730 result = snd_pcm_capture_rewind(substream, frames);
2731 __put_user(result, _frames);
2732 return result < 0 ? result : 0;
2733 }
2734 case SNDRV_PCM_IOCTL_FORWARD:
2735 {
2736 snd_pcm_uframes_t frames;
2737 snd_pcm_uframes_t __user *_frames = arg;
2738 snd_pcm_sframes_t result;
2739 if (get_user(frames, _frames))
2740 return -EFAULT;
2741 if (put_user(0, _frames))
2742 return -EFAULT;
2743 result = snd_pcm_capture_forward(substream, frames);
2744 __put_user(result, _frames);
2745 return result < 0 ? result : 0;
2746 }
2747 }
0df63e44 2748 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2749}
2750
877211f5
TI		 2751static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2752 unsigned long arg)
1da177e4 2753{
877211f5 2754 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2755
2756 pcm_file = file->private_data;
2757
2758 if (((cmd >> 8) & 0xff) != 'A')
2759 return -ENOTTY;
2760
0df63e44
TI		 2761 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2762 (void __user *)arg);
1da177e4
LT		 2763}
2764
877211f5
TI		 2765static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2766 unsigned long arg)
1da177e4 2767{
877211f5 2768 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2769
2770 pcm_file = file->private_data;
2771
2772 if (((cmd >> 8) & 0xff) != 'A')
2773 return -ENOTTY;
2774
0df63e44
TI		 2775 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2776 (void __user *)arg);
1da177e4
LT		 2777}
2778
bf1bbb5a
TI		 2779int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2780 unsigned int cmd, void *arg)
1da177e4
LT		 2781{
2782 mm_segment_t fs;
2783 int result;
2784
2785 fs = snd_enter_user();
1da177e4
LT		 2786 switch (substream->stream) {
2787 case SNDRV_PCM_STREAM_PLAYBACK:
0df63e44
TI		 2788 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2789 (void __user *)arg);
bf1bbb5a 2790 break;
1da177e4 2791 case SNDRV_PCM_STREAM_CAPTURE:
0df63e44
TI		 2792 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2793 (void __user *)arg);
bf1bbb5a 2794 break;
1da177e4 2795 default:
bf1bbb5a
TI		 2796 result = -EINVAL;
2797 break;
1da177e4 2798 }
bf1bbb5a
TI		 2799 snd_leave_user(fs);
2800 return result;
1da177e4
LT		 2801}
2802
e88e8ae6
TI		 2803EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2804
877211f5
TI		 2805static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2806 loff_t * offset)
1da177e4 2807{
877211f5
TI		 2808 struct snd_pcm_file *pcm_file;
2809 struct snd_pcm_substream *substream;
2810 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2811 snd_pcm_sframes_t result;
2812
2813 pcm_file = file->private_data;
2814 substream = pcm_file->substream;
7eaa943c
TI		 2815 if (PCM_RUNTIME_CHECK(substream))
2816 return -ENXIO;
1da177e4
LT		 2817 runtime = substream->runtime;
2818 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2819 return -EBADFD;
2820 if (!frame_aligned(runtime, count))
2821 return -EINVAL;
2822 count = bytes_to_frames(runtime, count);
2823 result = snd_pcm_lib_read(substream, buf, count);
2824 if (result > 0)
2825 result = frames_to_bytes(runtime, result);
2826 return result;
2827}
2828
877211f5
TI		 2829static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2830 size_t count, loff_t * offset)
1da177e4 2831{
877211f5
TI		 2832 struct snd_pcm_file *pcm_file;
2833 struct snd_pcm_substream *substream;
2834 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2835 snd_pcm_sframes_t result;
2836
2837 pcm_file = file->private_data;
2838 substream = pcm_file->substream;
7eaa943c
TI		 2839 if (PCM_RUNTIME_CHECK(substream))
2840 return -ENXIO;
1da177e4 2841 runtime = substream->runtime;
7eaa943c
TI		 2842 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2843 return -EBADFD;
2844 if (!frame_aligned(runtime, count))
2845 return -EINVAL;
1da177e4
LT		 2846 count = bytes_to_frames(runtime, count);
2847 result = snd_pcm_lib_write(substream, buf, count);
2848 if (result > 0)
2849 result = frames_to_bytes(runtime, result);
1da177e4
LT		 2850 return result;
2851}
2852
ee0b3e67
BP		 2853static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2854 unsigned long nr_segs, loff_t pos)
1da177e4
LT		 2855
2856{
877211f5
TI		 2857 struct snd_pcm_file *pcm_file;
2858 struct snd_pcm_substream *substream;
2859 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2860 snd_pcm_sframes_t result;
2861 unsigned long i;
2862 void __user **bufs;
2863 snd_pcm_uframes_t frames;
2864
ee0b3e67 2865 pcm_file = iocb->ki_filp->private_data;
1da177e4 2866 substream = pcm_file->substream;
7eaa943c
TI		 2867 if (PCM_RUNTIME_CHECK(substream))
2868 return -ENXIO;
1da177e4
LT		 2869 runtime = substream->runtime;
2870 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2871 return -EBADFD;
ee0b3e67 2872 if (nr_segs > 1024 || nr_segs != runtime->channels)
1da177e4 2873 return -EINVAL;
ee0b3e67 2874 if (!frame_aligned(runtime, iov->iov_len))
1da177e4 2875 return -EINVAL;
ee0b3e67
BP		 2876 frames = bytes_to_samples(runtime, iov->iov_len);
2877 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2878 if (bufs == NULL)
2879 return -ENOMEM;
ee0b3e67
BP		 2880 for (i = 0; i < nr_segs; ++i)
2881 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2882 result = snd_pcm_lib_readv(substream, bufs, frames);
2883 if (result > 0)
2884 result = frames_to_bytes(runtime, result);
2885 kfree(bufs);
2886 return result;
2887}
2888
ee0b3e67
BP		 2889static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2890 unsigned long nr_segs, loff_t pos)
1da177e4 2891{
877211f5
TI		 2892 struct snd_pcm_file *pcm_file;
2893 struct snd_pcm_substream *substream;
2894 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2895 snd_pcm_sframes_t result;
2896 unsigned long i;
2897 void __user **bufs;
2898 snd_pcm_uframes_t frames;
2899
ee0b3e67 2900 pcm_file = iocb->ki_filp->private_data;
1da177e4 2901 substream = pcm_file->substream;
7eaa943c
TI		 2902 if (PCM_RUNTIME_CHECK(substream))
2903 return -ENXIO;
1da177e4 2904 runtime = substream->runtime;
7eaa943c
TI		 2905 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2906 return -EBADFD;
ee0b3e67 2907 if (nr_segs > 128 || nr_segs != runtime->channels ||
7eaa943c
TI		 2908 !frame_aligned(runtime, iov->iov_len))
2909 return -EINVAL;
ee0b3e67
BP		 2910 frames = bytes_to_samples(runtime, iov->iov_len);
2911 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2912 if (bufs == NULL)
2913 return -ENOMEM;
ee0b3e67
BP		 2914 for (i = 0; i < nr_segs; ++i)
2915 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2916 result = snd_pcm_lib_writev(substream, bufs, frames);
2917 if (result > 0)
2918 result = frames_to_bytes(runtime, result);
2919 kfree(bufs);
1da177e4
LT		 2920 return result;
2921}
2922
2923static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2924{
877211f5
TI		 2925 struct snd_pcm_file *pcm_file;
2926 struct snd_pcm_substream *substream;
2927 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2928 unsigned int mask;
2929 snd_pcm_uframes_t avail;
2930
2931 pcm_file = file->private_data;
2932
2933 substream = pcm_file->substream;
7eaa943c
TI		 2934 if (PCM_RUNTIME_CHECK(substream))
2935 return -ENXIO;
1da177e4
LT		 2936 runtime = substream->runtime;
2937
2938 poll_wait(file, &runtime->sleep, wait);
2939
2940 snd_pcm_stream_lock_irq(substream);
2941 avail = snd_pcm_playback_avail(runtime);
2942 switch (runtime->status->state) {
2943 case SNDRV_PCM_STATE_RUNNING:
2944 case SNDRV_PCM_STATE_PREPARED:
2945 case SNDRV_PCM_STATE_PAUSED:
2946 if (avail >= runtime->control->avail_min) {
2947 mask = POLLOUT | POLLWRNORM;
2948 break;
2949 }
2950 /* Fall through */
2951 case SNDRV_PCM_STATE_DRAINING:
2952 mask = 0;
2953 break;
2954 default:
2955 mask = POLLOUT | POLLWRNORM | POLLERR;
2956 break;
2957 }
2958 snd_pcm_stream_unlock_irq(substream);
2959 return mask;
2960}
2961
2962static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2963{
877211f5
TI		 2964 struct snd_pcm_file *pcm_file;
2965 struct snd_pcm_substream *substream;
2966 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2967 unsigned int mask;
2968 snd_pcm_uframes_t avail;
2969
2970 pcm_file = file->private_data;
2971
2972 substream = pcm_file->substream;
7eaa943c
TI		 2973 if (PCM_RUNTIME_CHECK(substream))
2974 return -ENXIO;
1da177e4
LT		 2975 runtime = substream->runtime;
2976
2977 poll_wait(file, &runtime->sleep, wait);
2978
2979 snd_pcm_stream_lock_irq(substream);
2980 avail = snd_pcm_capture_avail(runtime);
2981 switch (runtime->status->state) {
2982 case SNDRV_PCM_STATE_RUNNING:
2983 case SNDRV_PCM_STATE_PREPARED:
2984 case SNDRV_PCM_STATE_PAUSED:
2985 if (avail >= runtime->control->avail_min) {
2986 mask = POLLIN | POLLRDNORM;
2987 break;
2988 }
2989 mask = 0;
2990 break;
2991 case SNDRV_PCM_STATE_DRAINING:
2992 if (avail > 0) {
2993 mask = POLLIN | POLLRDNORM;
2994 break;
2995 }
2996 /* Fall through */
2997 default:
2998 mask = POLLIN | POLLRDNORM | POLLERR;
2999 break;
3000 }
3001 snd_pcm_stream_unlock_irq(substream);
3002 return mask;
3003}
3004
3005/*
3006 * mmap support
3007 */
3008
3009/*
3010 * Only on coherent architectures, we can mmap the status and the control records
3011 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3012 */
3013#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3014/*
3015 * mmap status record
3016 */
3ad5afcd
NP		 3017static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3018 struct vm_fault *vmf)
1da177e4 3019{
877211f5
TI		 3020 struct snd_pcm_substream *substream = area->vm_private_data;
3021 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3022
3023 if (substream == NULL)
3ad5afcd 3024 return VM_FAULT_SIGBUS;
1da177e4 3025 runtime = substream->runtime;
3ad5afcd
NP		 3026 vmf->page = virt_to_page(runtime->status);
3027 get_page(vmf->page);
3028 return 0;
1da177e4
LT		 3029}
3030
f0f37e2f 3031static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 3032{
3ad5afcd 3033 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3034};
3035
877211f5 3036static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3037 struct vm_area_struct *area)
3038{
877211f5 3039 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3040 long size;
3041 if (!(area->vm_flags & VM_READ))
3042 return -EINVAL;
3043 runtime = substream->runtime;
1da177e4 3044 size = area->vm_end - area->vm_start;
877211f5 3045 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3046 return -EINVAL;
3047 area->vm_ops = &snd_pcm_vm_ops_status;
3048 area->vm_private_data = substream;
3049 area->vm_flags |= VM_RESERVED;
3050 return 0;
3051}
3052
3053/*
3054 * mmap control record
3055 */
3ad5afcd
NP		 3056static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3057 struct vm_fault *vmf)
1da177e4 3058{
877211f5
TI		 3059 struct snd_pcm_substream *substream = area->vm_private_data;
3060 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3061
3062 if (substream == NULL)
3ad5afcd 3063 return VM_FAULT_SIGBUS;
1da177e4 3064 runtime = substream->runtime;
3ad5afcd
NP		 3065 vmf->page = virt_to_page(runtime->control);
3066 get_page(vmf->page);
3067 return 0;
1da177e4
LT		 3068}
3069
f0f37e2f 3070static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3071{
3ad5afcd 3072 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3073};
3074
877211f5 3075static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3076 struct vm_area_struct *area)
3077{
877211f5 3078 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3079 long size;
3080 if (!(area->vm_flags & VM_READ))
3081 return -EINVAL;
3082 runtime = substream->runtime;
1da177e4 3083 size = area->vm_end - area->vm_start;
877211f5 3084 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3085 return -EINVAL;
3086 area->vm_ops = &snd_pcm_vm_ops_control;
3087 area->vm_private_data = substream;
3088 area->vm_flags |= VM_RESERVED;
3089 return 0;
3090}
3091#else /* ! coherent mmap */
3092/*
3093 * don't support mmap for status and control records.
3094 */
877211f5 3095static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3096 struct vm_area_struct *area)
3097{
3098 return -ENXIO;
3099}
877211f5 3100static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3101 struct vm_area_struct *area)
3102{
3103 return -ENXIO;
3104}
3105#endif /* coherent mmap */
3106
9eb4a067
TI		 3107static inline struct page *
3108snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3109{
3110 void *vaddr = substream->runtime->dma_area + ofs;
66b6cfac
TI		 3111#if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3112 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3113 return virt_to_page(CAC_ADDR(vaddr));
6985c887
TI		 3114#endif
3115#if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3116 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3117 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3118 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3119 /* assume dma_handle set via pfn_to_phys() in
3120 * mm/dma-noncoherent.c
3121 */
3122 return pfn_to_page(addr >> PAGE_SHIFT);
3123 }
66b6cfac 3124#endif
9eb4a067
TI		 3125 return virt_to_page(vaddr);
3126}
3127
1da177e4 3128/*
3ad5afcd 3129 * fault callback for mmapping a RAM page
1da177e4 3130 */
3ad5afcd
NP		 3131static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3132 struct vm_fault *vmf)
1da177e4 3133{
877211f5
TI		 3134 struct snd_pcm_substream *substream = area->vm_private_data;
3135 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3136 unsigned long offset;
3137 struct page * page;
1da177e4
LT		 3138 size_t dma_bytes;
3139
3140 if (substream == NULL)
3ad5afcd 3141 return VM_FAULT_SIGBUS;
1da177e4 3142 runtime = substream->runtime;
3ad5afcd 3143 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3144 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3145 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3146 return VM_FAULT_SIGBUS;
9eb4a067 3147 if (substream->ops->page)
1da177e4 3148 page = substream->ops->page(substream, offset);
9eb4a067
TI		 3149 else
3150 page = snd_pcm_default_page_ops(substream, offset);
3151 if (!page)
3152 return VM_FAULT_SIGBUS;
b5810039 3153 get_page(page);
3ad5afcd
NP		 3154 vmf->page = page;
3155 return 0;
1da177e4
LT		 3156}
3157
657b1989
TI		 3158static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3159 .open = snd_pcm_mmap_data_open,
3160 .close = snd_pcm_mmap_data_close,
3161};
3162
3163static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3164 .open = snd_pcm_mmap_data_open,
3165 .close = snd_pcm_mmap_data_close,
3ad5afcd 3166 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3167};
3168
657b1989
TI		 3169#ifndef ARCH_HAS_DMA_MMAP_COHERENT
3170/* This should be defined / handled globally! */
3171#ifdef CONFIG_ARM
3172#define ARCH_HAS_DMA_MMAP_COHERENT
3173#endif
3174#endif
3175
1da177e4
LT		 3176/*
3177 * mmap the DMA buffer on RAM
3178 */
877211f5
TI		 3179static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3180 struct vm_area_struct *area)
1da177e4 3181{
1da177e4 3182 area->vm_flags |= VM_RESERVED;
657b1989
TI		 3183#ifdef ARCH_HAS_DMA_MMAP_COHERENT
3184 if (!substream->ops->page &&
3185 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3186 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3187 area,
3188 substream->runtime->dma_area,
3189 substream->runtime->dma_addr,
3190 area->vm_end - area->vm_start);
3191#endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3192 /* mmap with fault handler */
3193 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3194 return 0;
3195}
3196
3197/*
3198 * mmap the DMA buffer on I/O memory area
3199 */
3200#if SNDRV_PCM_INFO_MMAP_IOMEM
877211f5
TI		 3201int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3202 struct vm_area_struct *area)
1da177e4
LT		 3203{
3204 long size;
3205 unsigned long offset;
3206
1da177e4 3207 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
1da177e4
LT		 3208 area->vm_flags |= VM_IO;
3209 size = area->vm_end - area->vm_start;
3210 offset = area->vm_pgoff << PAGE_SHIFT;
3211 if (io_remap_pfn_range(area, area->vm_start,
3212 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3213 size, area->vm_page_prot))
3214 return -EAGAIN;
1da177e4
LT		 3215 return 0;
3216}
e88e8ae6
TI		 3217
3218EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3219#endif /* SNDRV_PCM_INFO_MMAP */
3220
c32d977b
TI		 3221/* mmap callback with pgprot_noncached */
3222int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream,
3223 struct vm_area_struct *area)
3224{
3225 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3226 return snd_pcm_default_mmap(substream, area);
3227}
3228EXPORT_SYMBOL(snd_pcm_lib_mmap_noncached);
3229
1da177e4
LT		 3230/*
3231 * mmap DMA buffer
3232 */
877211f5 3233int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3234 struct vm_area_struct *area)
3235{
877211f5 3236 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3237 long size;
3238 unsigned long offset;
3239 size_t dma_bytes;
657b1989 3240 int err;
1da177e4
LT		 3241
3242 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3243 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3244 return -EINVAL;
3245 } else {
3246 if (!(area->vm_flags & VM_READ))
3247 return -EINVAL;
3248 }
3249 runtime = substream->runtime;
1da177e4
LT		 3250 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3251 return -EBADFD;
3252 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3253 return -ENXIO;
3254 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3255 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3256 return -EINVAL;
3257 size = area->vm_end - area->vm_start;
3258 offset = area->vm_pgoff << PAGE_SHIFT;
3259 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3260 if ((size_t)size > dma_bytes)
3261 return -EINVAL;
3262 if (offset > dma_bytes - size)
3263 return -EINVAL;
3264
657b1989
TI		 3265 area->vm_ops = &snd_pcm_vm_ops_data;
3266 area->vm_private_data = substream;
1da177e4 3267 if (substream->ops->mmap)
657b1989 3268 err = substream->ops->mmap(substream, area);
1da177e4 3269 else
657b1989
TI		 3270 err = snd_pcm_default_mmap(substream, area);
3271 if (!err)
3272 atomic_inc(&substream->mmap_count);
3273 return err;
1da177e4
LT		 3274}
3275
e88e8ae6
TI		 3276EXPORT_SYMBOL(snd_pcm_mmap_data);
3277
1da177e4
LT		 3278static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3279{
877211f5
TI		 3280 struct snd_pcm_file * pcm_file;
3281 struct snd_pcm_substream *substream;
1da177e4
LT		 3282 unsigned long offset;
3283
3284 pcm_file = file->private_data;
3285 substream = pcm_file->substream;
7eaa943c
TI		 3286 if (PCM_RUNTIME_CHECK(substream))
3287 return -ENXIO;
1da177e4
LT		 3288
3289 offset = area->vm_pgoff << PAGE_SHIFT;
3290 switch (offset) {
3291 case SNDRV_PCM_MMAP_OFFSET_STATUS:
548a648b 3292 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3293 return -ENXIO;
3294 return snd_pcm_mmap_status(substream, file, area);
3295 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
548a648b 3296 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3297 return -ENXIO;
3298 return snd_pcm_mmap_control(substream, file, area);
3299 default:
3300 return snd_pcm_mmap_data(substream, file, area);
3301 }
3302 return 0;
3303}
3304
3305static int snd_pcm_fasync(int fd, struct file * file, int on)
3306{
877211f5
TI		 3307 struct snd_pcm_file * pcm_file;
3308 struct snd_pcm_substream *substream;
3309 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3310
3311 pcm_file = file->private_data;
3312 substream = pcm_file->substream;
7eaa943c 3313 if (PCM_RUNTIME_CHECK(substream))
d05468b7 3314 return -ENXIO;
1da177e4 3315 runtime = substream->runtime;
d05468b7 3316 return fasync_helper(fd, file, on, &runtime->fasync);
1da177e4
LT		 3317}
3318
3319/*
3320 * ioctl32 compat
3321 */
3322#ifdef CONFIG_COMPAT
3323#include "pcm_compat.c"
3324#else
3325#define snd_pcm_ioctl_compat NULL
3326#endif
3327
3328/*
3329 * To be removed helpers to keep binary compatibility
3330 */
3331
59d48582 3332#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3333#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3334#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3335
877211f5
TI		 3336static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3337 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3338{
3339 unsigned int i;
3340
3341 memset(params, 0, sizeof(*params));
3342 params->flags = oparams->flags;
3343 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3344 params->masks[i].bits[0] = oparams->masks[i];
3345 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3346 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3347 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3348 params->info = oparams->info;
3349 params->msbits = oparams->msbits;
3350 params->rate_num = oparams->rate_num;
3351 params->rate_den = oparams->rate_den;
3352 params->fifo_size = oparams->fifo_size;
3353}
3354
877211f5
TI		 3355static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3356 struct snd_pcm_hw_params *params)
1da177e4
LT		 3357{
3358 unsigned int i;
3359
3360 memset(oparams, 0, sizeof(*oparams));
3361 oparams->flags = params->flags;
3362 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3363 oparams->masks[i] = params->masks[i].bits[0];
3364 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3365 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3366 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3367 oparams->info = params->info;
3368 oparams->msbits = params->msbits;
3369 oparams->rate_num = params->rate_num;
3370 oparams->rate_den = params->rate_den;
3371 oparams->fifo_size = params->fifo_size;
3372}
3373
877211f5
TI		 3374static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3375 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3376{
877211f5
TI		 3377 struct snd_pcm_hw_params *params;
3378 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3379 int err;
3380
3381 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3382 if (!params)
3383 return -ENOMEM;
1da177e4 3384
ef44a1ec
LZ		 3385 oparams = memdup_user(_oparams, sizeof(*oparams));
3386 if (IS_ERR(oparams)) {
3387 err = PTR_ERR(oparams);
1da177e4
LT		 3388 goto out;
3389 }
3390 snd_pcm_hw_convert_from_old_params(params, oparams);
3391 err = snd_pcm_hw_refine(substream, params);
3392 snd_pcm_hw_convert_to_old_params(oparams, params);
3393 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3394 if (!err)
3395 err = -EFAULT;
3396 }
ef44a1ec
LZ		 3397
3398 kfree(oparams);
1da177e4
LT		 3399out:
3400 kfree(params);
1da177e4
LT		 3401 return err;
3402}
3403
877211f5
TI		 3404static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3405 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3406{
877211f5
TI		 3407 struct snd_pcm_hw_params *params;
3408 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3409 int err;
3410
3411 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3412 if (!params)
3413 return -ENOMEM;
3414
3415 oparams = memdup_user(_oparams, sizeof(*oparams));
3416 if (IS_ERR(oparams)) {
3417 err = PTR_ERR(oparams);
1da177e4
LT		 3418 goto out;
3419 }
3420 snd_pcm_hw_convert_from_old_params(params, oparams);
3421 err = snd_pcm_hw_params(substream, params);
3422 snd_pcm_hw_convert_to_old_params(oparams, params);
3423 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3424 if (!err)
3425 err = -EFAULT;
3426 }
ef44a1ec
LZ		 3427
3428 kfree(oparams);
1da177e4
LT		 3429out:
3430 kfree(params);
1da177e4
LT		 3431 return err;
3432}
59d48582 3433#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 3434
7003609b
CC		 3435#ifndef CONFIG_MMU
3436unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
3437 unsigned long len, unsigned long pgoff,
3438 unsigned long flags)
3439{
3440 return 0;
3441}
3442#else
3443# define dummy_get_unmapped_area NULL
3444#endif
3445
1da177e4
LT		 3446/*
3447 * Register section
3448 */
3449
9c2e08c5 3450const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3451 {
2af677fc
CL		 3452 .owner = THIS_MODULE,
3453 .write = snd_pcm_write,
ee0b3e67 3454 .aio_write = snd_pcm_aio_write,
f87135f5 3455 .open = snd_pcm_playback_open,
2af677fc 3456 .release = snd_pcm_release,
02f4865f 3457 .llseek = no_llseek,
2af677fc
CL		 3458 .poll = snd_pcm_playback_poll,
3459 .unlocked_ioctl = snd_pcm_playback_ioctl,
3460 .compat_ioctl = snd_pcm_ioctl_compat,
3461 .mmap = snd_pcm_mmap,
3462 .fasync = snd_pcm_fasync,
7003609b 3463 .get_unmapped_area = dummy_get_unmapped_area,
1da177e4
LT		 3464 },
3465 {
2af677fc
CL		 3466 .owner = THIS_MODULE,
3467 .read = snd_pcm_read,
ee0b3e67 3468 .aio_read = snd_pcm_aio_read,
f87135f5 3469 .open = snd_pcm_capture_open,
2af677fc 3470 .release = snd_pcm_release,
02f4865f 3471 .llseek = no_llseek,
2af677fc
CL		 3472 .poll = snd_pcm_capture_poll,
3473 .unlocked_ioctl = snd_pcm_capture_ioctl,
3474 .compat_ioctl = snd_pcm_ioctl_compat,
3475 .mmap = snd_pcm_mmap,
3476 .fasync = snd_pcm_fasync,
7003609b 3477 .get_unmapped_area = dummy_get_unmapped_area,
1da177e4
LT		 3478 }
3479};
kernel source for telekom puls (alcatel/mediatek)