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ALSA: sh: Fix up namespace collision in sh_dac_audio.
[mirror_ubuntu-jammy-kernel.git] / sound / core / pcm_native.c
CommitLineData
1da177e4
LT		 1/*
2 * Digital Audio (PCM) abstract layer
c1017a4c 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
1da177e4 22#include <linux/mm.h>
da155d5b 23#include <linux/module.h>
1da177e4
LT		 24#include <linux/file.h>
25#include <linux/slab.h>
26#include <linux/time.h>
e8db0be1 27#include <linux/pm_qos.h>
1da177e4 28#include <linux/uio.h>
657b1989 29#include <linux/dma-mapping.h>
1da177e4
LT		 30#include <sound/core.h>
31#include <sound/control.h>
32#include <sound/info.h>
33#include <sound/pcm.h>
34#include <sound/pcm_params.h>
35#include <sound/timer.h>
36#include <sound/minors.h>
37#include <asm/io.h>
9fe17b5d
TI		 38#if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
39#include <dma-coherence.h>
40#endif
1da177e4
LT		 41
42/*
43 * Compatibility
44 */
45
877211f5 46struct snd_pcm_hw_params_old {
1da177e4
LT		 47 unsigned int flags;
48 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
49 SNDRV_PCM_HW_PARAM_ACCESS + 1];
877211f5 50 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
1da177e4
LT		 51 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
52 unsigned int rmask;
53 unsigned int cmask;
54 unsigned int info;
55 unsigned int msbits;
56 unsigned int rate_num;
57 unsigned int rate_den;
877211f5 58 snd_pcm_uframes_t fifo_size;
1da177e4
LT		 59 unsigned char reserved[64];
60};
61
59d48582 62#ifdef CONFIG_SND_SUPPORT_OLD_API
877211f5
TI		 63#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
64#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
1da177e4 65
877211f5
TI		 66static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
67 struct snd_pcm_hw_params_old __user * _oparams);
68static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
69 struct snd_pcm_hw_params_old __user * _oparams);
59d48582 70#endif
f87135f5 71static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
1da177e4
LT		 72
73/*
74 *
75 */
76
77DEFINE_RWLOCK(snd_pcm_link_rwlock);
e88e8ae6 78EXPORT_SYMBOL(snd_pcm_link_rwlock);
1da177e4 79
e88e8ae6 80static DECLARE_RWSEM(snd_pcm_link_rwsem);
1da177e4
LT		 81
82static inline mm_segment_t snd_enter_user(void)
83{
84 mm_segment_t fs = get_fs();
85 set_fs(get_ds());
86 return fs;
87}
88
89static inline void snd_leave_user(mm_segment_t fs)
90{
91 set_fs(fs);
92}
93
94
95
877211f5 96int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
1da177e4 97{
877211f5
TI		 98 struct snd_pcm_runtime *runtime;
99 struct snd_pcm *pcm = substream->pcm;
100 struct snd_pcm_str *pstr = substream->pstr;
1da177e4 101
1da177e4
LT		 102 memset(info, 0, sizeof(*info));
103 info->card = pcm->card->number;
104 info->device = pcm->device;
105 info->stream = substream->stream;
106 info->subdevice = substream->number;
107 strlcpy(info->id, pcm->id, sizeof(info->id));
108 strlcpy(info->name, pcm->name, sizeof(info->name));
109 info->dev_class = pcm->dev_class;
110 info->dev_subclass = pcm->dev_subclass;
111 info->subdevices_count = pstr->substream_count;
112 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
113 strlcpy(info->subname, substream->name, sizeof(info->subname));
114 runtime = substream->runtime;
115 /* AB: FIXME!!! This is definitely nonsense */
116 if (runtime) {
117 info->sync = runtime->sync;
118 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
119 }
120 return 0;
121}
122
877211f5
TI		 123int snd_pcm_info_user(struct snd_pcm_substream *substream,
124 struct snd_pcm_info __user * _info)
1da177e4 125{
877211f5 126 struct snd_pcm_info *info;
1da177e4
LT		 127 int err;
128
129 info = kmalloc(sizeof(*info), GFP_KERNEL);
130 if (! info)
131 return -ENOMEM;
132 err = snd_pcm_info(substream, info);
133 if (err >= 0) {
134 if (copy_to_user(_info, info, sizeof(*info)))
135 err = -EFAULT;
136 }
137 kfree(info);
138 return err;
139}
140
141#undef RULES_DEBUG
142
143#ifdef RULES_DEBUG
144#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
47023ec7 145static const char * const snd_pcm_hw_param_names[] = {
1da177e4
LT		 146 HW_PARAM(ACCESS),
147 HW_PARAM(FORMAT),
148 HW_PARAM(SUBFORMAT),
149 HW_PARAM(SAMPLE_BITS),
150 HW_PARAM(FRAME_BITS),
151 HW_PARAM(CHANNELS),
152 HW_PARAM(RATE),
153 HW_PARAM(PERIOD_TIME),
154 HW_PARAM(PERIOD_SIZE),
155 HW_PARAM(PERIOD_BYTES),
156 HW_PARAM(PERIODS),
157 HW_PARAM(BUFFER_TIME),
158 HW_PARAM(BUFFER_SIZE),
159 HW_PARAM(BUFFER_BYTES),
160 HW_PARAM(TICK_TIME),
161};
162#endif
163
877211f5
TI		 164int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
165 struct snd_pcm_hw_params *params)
1da177e4
LT		 166{
167 unsigned int k;
877211f5
TI		 168 struct snd_pcm_hardware *hw;
169 struct snd_interval *i = NULL;
170 struct snd_mask *m = NULL;
171 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
1da177e4
LT		 172 unsigned int rstamps[constrs->rules_num];
173 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
174 unsigned int stamp = 2;
175 int changed, again;
176
177 params->info = 0;
178 params->fifo_size = 0;
179 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
180 params->msbits = 0;
181 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
182 params->rate_num = 0;
183 params->rate_den = 0;
184 }
185
186 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
187 m = hw_param_mask(params, k);
188 if (snd_mask_empty(m))
189 return -EINVAL;
190 if (!(params->rmask & (1 << k)))
191 continue;
192#ifdef RULES_DEBUG
006de267 193 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
1da177e4
LT		 194 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
195#endif
196 changed = snd_mask_refine(m, constrs_mask(constrs, k));
197#ifdef RULES_DEBUG
198 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
199#endif
200 if (changed)
201 params->cmask |= 1 << k;
202 if (changed < 0)
203 return changed;
204 }
205
206 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
207 i = hw_param_interval(params, k);
208 if (snd_interval_empty(i))
209 return -EINVAL;
210 if (!(params->rmask & (1 << k)))
211 continue;
212#ifdef RULES_DEBUG
006de267 213 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
1da177e4
LT		 214 if (i->empty)
215 printk("empty");
216 else
217 printk("%c%u %u%c",
218 i->openmin ? '(' : '[', i->min,
219 i->max, i->openmax ? ')' : ']');
220 printk(" -> ");
221#endif
222 changed = snd_interval_refine(i, constrs_interval(constrs, k));
223#ifdef RULES_DEBUG
224 if (i->empty)
225 printk("empty\n");
226 else
227 printk("%c%u %u%c\n",
228 i->openmin ? '(' : '[', i->min,
229 i->max, i->openmax ? ')' : ']');
230#endif
231 if (changed)
232 params->cmask |= 1 << k;
233 if (changed < 0)
234 return changed;
235 }
236
237 for (k = 0; k < constrs->rules_num; k++)
238 rstamps[k] = 0;
239 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
240 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
241 do {
242 again = 0;
243 for (k = 0; k < constrs->rules_num; k++) {
877211f5 244 struct snd_pcm_hw_rule *r = &constrs->rules[k];
1da177e4
LT		 245 unsigned int d;
246 int doit = 0;
247 if (r->cond && !(r->cond & params->flags))
248 continue;
249 for (d = 0; r->deps[d] >= 0; d++) {
250 if (vstamps[r->deps[d]] > rstamps[k]) {
251 doit = 1;
252 break;
253 }
254 }
255 if (!doit)
256 continue;
257#ifdef RULES_DEBUG
006de267 258 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
1da177e4
LT		 259 if (r->var >= 0) {
260 printk("%s = ", snd_pcm_hw_param_names[r->var]);
261 if (hw_is_mask(r->var)) {
262 m = hw_param_mask(params, r->var);
263 printk("%x", *m->bits);
264 } else {
265 i = hw_param_interval(params, r->var);
266 if (i->empty)
267 printk("empty");
268 else
269 printk("%c%u %u%c",
270 i->openmin ? '(' : '[', i->min,
271 i->max, i->openmax ? ')' : ']');
272 }
273 }
274#endif
275 changed = r->func(params, r);
276#ifdef RULES_DEBUG
277 if (r->var >= 0) {
278 printk(" -> ");
279 if (hw_is_mask(r->var))
280 printk("%x", *m->bits);
281 else {
282 if (i->empty)
283 printk("empty");
284 else
285 printk("%c%u %u%c",
286 i->openmin ? '(' : '[', i->min,
287 i->max, i->openmax ? ')' : ']');
288 }
289 }
290 printk("\n");
291#endif
292 rstamps[k] = stamp;
293 if (changed && r->var >= 0) {
294 params->cmask |= (1 << r->var);
295 vstamps[r->var] = stamp;
296 again = 1;
297 }
298 if (changed < 0)
299 return changed;
300 stamp++;
301 }
302 } while (again);
303 if (!params->msbits) {
304 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
305 if (snd_interval_single(i))
306 params->msbits = snd_interval_value(i);
307 }
308
309 if (!params->rate_den) {
310 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
311 if (snd_interval_single(i)) {
312 params->rate_num = snd_interval_value(i);
313 params->rate_den = 1;
314 }
315 }
316
317 hw = &substream->runtime->hw;
318 if (!params->info)
8bea869c
JK		 319 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
320 if (!params->fifo_size) {
3be522a9
JK		 321 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
322 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
323 if (snd_mask_min(m) == snd_mask_max(m) &&
324 snd_interval_min(i) == snd_interval_max(i)) {
8bea869c
JK		 325 changed = substream->ops->ioctl(substream,
326 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
8bd9bca3 327 if (changed < 0)
8bea869c
JK		 328 return changed;
329 }
330 }
1da177e4
LT		 331 params->rmask = 0;
332 return 0;
333}
334
e88e8ae6
TI		 335EXPORT_SYMBOL(snd_pcm_hw_refine);
336
877211f5
TI		 337static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
338 struct snd_pcm_hw_params __user * _params)
1da177e4 339{
877211f5 340 struct snd_pcm_hw_params *params;
1da177e4
LT		 341 int err;
342
ef44a1ec
LZ		 343 params = memdup_user(_params, sizeof(*params));
344 if (IS_ERR(params))
345 return PTR_ERR(params);
346
1da177e4
LT		 347 err = snd_pcm_hw_refine(substream, params);
348 if (copy_to_user(_params, params, sizeof(*params))) {
349 if (!err)
350 err = -EFAULT;
351 }
ef44a1ec 352
1da177e4
LT		 353 kfree(params);
354 return err;
355}
356
9442e691
TI		 357static int period_to_usecs(struct snd_pcm_runtime *runtime)
358{
359 int usecs;
360
361 if (! runtime->rate)
362 return -1; /* invalid */
363
364 /* take 75% of period time as the deadline */
365 usecs = (750000 / runtime->rate) * runtime->period_size;
366 usecs += ((750000 % runtime->rate) * runtime->period_size) /
367 runtime->rate;
368
369 return usecs;
370}
371
877211f5
TI		 372static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
373 struct snd_pcm_hw_params *params)
1da177e4 374{
877211f5 375 struct snd_pcm_runtime *runtime;
9442e691 376 int err, usecs;
1da177e4
LT		 377 unsigned int bits;
378 snd_pcm_uframes_t frames;
379
7eaa943c
TI		 380 if (PCM_RUNTIME_CHECK(substream))
381 return -ENXIO;
1da177e4 382 runtime = substream->runtime;
1da177e4
LT		 383 snd_pcm_stream_lock_irq(substream);
384 switch (runtime->status->state) {
385 case SNDRV_PCM_STATE_OPEN:
386 case SNDRV_PCM_STATE_SETUP:
387 case SNDRV_PCM_STATE_PREPARED:
388 break;
389 default:
390 snd_pcm_stream_unlock_irq(substream);
391 return -EBADFD;
392 }
393 snd_pcm_stream_unlock_irq(substream);
394#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
395 if (!substream->oss.oss)
396#endif
9c323fcb 397 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 398 return -EBADFD;
399
400 params->rmask = ~0U;
401 err = snd_pcm_hw_refine(substream, params);
402 if (err < 0)
403 goto _error;
404
405 err = snd_pcm_hw_params_choose(substream, params);
406 if (err < 0)
407 goto _error;
408
409 if (substream->ops->hw_params != NULL) {
410 err = substream->ops->hw_params(substream, params);
411 if (err < 0)
412 goto _error;
413 }
414
415 runtime->access = params_access(params);
416 runtime->format = params_format(params);
417 runtime->subformat = params_subformat(params);
418 runtime->channels = params_channels(params);
419 runtime->rate = params_rate(params);
420 runtime->period_size = params_period_size(params);
421 runtime->periods = params_periods(params);
422 runtime->buffer_size = params_buffer_size(params);
1da177e4
LT		 423 runtime->info = params->info;
424 runtime->rate_num = params->rate_num;
425 runtime->rate_den = params->rate_den;
ab69a490
CL		 426 runtime->no_period_wakeup =
427 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
428 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
1da177e4
LT		 429
430 bits = snd_pcm_format_physical_width(runtime->format);
431 runtime->sample_bits = bits;
432 bits *= runtime->channels;
433 runtime->frame_bits = bits;
434 frames = 1;
435 while (bits % 8 != 0) {
436 bits *= 2;
437 frames *= 2;
438 }
439 runtime->byte_align = bits / 8;
440 runtime->min_align = frames;
441
442 /* Default sw params */
443 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
444 runtime->period_step = 1;
1da177e4 445 runtime->control->avail_min = runtime->period_size;
1da177e4
LT		 446 runtime->start_threshold = 1;
447 runtime->stop_threshold = runtime->buffer_size;
448 runtime->silence_threshold = 0;
449 runtime->silence_size = 0;
ead4046b
CL		 450 runtime->boundary = runtime->buffer_size;
451 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
452 runtime->boundary *= 2;
1da177e4
LT		 453
454 snd_pcm_timer_resolution_change(substream);
455 runtime->status->state = SNDRV_PCM_STATE_SETUP;
9442e691 456
82f68251
JB		 457 if (pm_qos_request_active(&substream->latency_pm_qos_req))
458 pm_qos_remove_request(&substream->latency_pm_qos_req);
9442e691 459 if ((usecs = period_to_usecs(runtime)) >= 0)
82f68251
JB		 460 pm_qos_add_request(&substream->latency_pm_qos_req,
461 PM_QOS_CPU_DMA_LATENCY, usecs);
1da177e4
LT		 462 return 0;
463 _error:
25985edc 464 /* hardware might be unusable from this time,
1da177e4
LT		 465 so we force application to retry to set
466 the correct hardware parameter settings */
467 runtime->status->state = SNDRV_PCM_STATE_OPEN;
468 if (substream->ops->hw_free != NULL)
469 substream->ops->hw_free(substream);
470 return err;
471}
472
877211f5
TI		 473static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
474 struct snd_pcm_hw_params __user * _params)
1da177e4 475{
877211f5 476 struct snd_pcm_hw_params *params;
1da177e4
LT		 477 int err;
478
ef44a1ec
LZ		 479 params = memdup_user(_params, sizeof(*params));
480 if (IS_ERR(params))
481 return PTR_ERR(params);
482
1da177e4
LT		 483 err = snd_pcm_hw_params(substream, params);
484 if (copy_to_user(_params, params, sizeof(*params))) {
485 if (!err)
486 err = -EFAULT;
487 }
ef44a1ec 488
1da177e4
LT		 489 kfree(params);
490 return err;
491}
492
877211f5 493static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 494{
877211f5 495 struct snd_pcm_runtime *runtime;
1da177e4
LT		 496 int result = 0;
497
7eaa943c
TI		 498 if (PCM_RUNTIME_CHECK(substream))
499 return -ENXIO;
1da177e4 500 runtime = substream->runtime;
1da177e4
LT		 501 snd_pcm_stream_lock_irq(substream);
502 switch (runtime->status->state) {
503 case SNDRV_PCM_STATE_SETUP:
504 case SNDRV_PCM_STATE_PREPARED:
505 break;
506 default:
507 snd_pcm_stream_unlock_irq(substream);
508 return -EBADFD;
509 }
510 snd_pcm_stream_unlock_irq(substream);
9c323fcb 511 if (atomic_read(&substream->mmap_count))
1da177e4
LT		 512 return -EBADFD;
513 if (substream->ops->hw_free)
514 result = substream->ops->hw_free(substream);
515 runtime->status->state = SNDRV_PCM_STATE_OPEN;
82f68251 516 pm_qos_remove_request(&substream->latency_pm_qos_req);
1da177e4
LT		 517 return result;
518}
519
877211f5
TI		 520static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
521 struct snd_pcm_sw_params *params)
1da177e4 522{
877211f5 523 struct snd_pcm_runtime *runtime;
1250932e 524 int err;
1da177e4 525
7eaa943c
TI		 526 if (PCM_RUNTIME_CHECK(substream))
527 return -ENXIO;
1da177e4 528 runtime = substream->runtime;
1da177e4
LT		 529 snd_pcm_stream_lock_irq(substream);
530 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
531 snd_pcm_stream_unlock_irq(substream);
532 return -EBADFD;
533 }
534 snd_pcm_stream_unlock_irq(substream);
535
536 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
537 return -EINVAL;
538 if (params->avail_min == 0)
539 return -EINVAL;
1da177e4
LT		 540 if (params->silence_size >= runtime->boundary) {
541 if (params->silence_threshold != 0)
542 return -EINVAL;
543 } else {
544 if (params->silence_size > params->silence_threshold)
545 return -EINVAL;
546 if (params->silence_threshold > runtime->buffer_size)
547 return -EINVAL;
548 }
1250932e 549 err = 0;
1da177e4
LT		 550 snd_pcm_stream_lock_irq(substream);
551 runtime->tstamp_mode = params->tstamp_mode;
1da177e4
LT		 552 runtime->period_step = params->period_step;
553 runtime->control->avail_min = params->avail_min;
554 runtime->start_threshold = params->start_threshold;
555 runtime->stop_threshold = params->stop_threshold;
556 runtime->silence_threshold = params->silence_threshold;
557 runtime->silence_size = params->silence_size;
1da177e4
LT		 558 params->boundary = runtime->boundary;
559 if (snd_pcm_running(substream)) {
1da177e4
LT		 560 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
561 runtime->silence_size > 0)
562 snd_pcm_playback_silence(substream, ULONG_MAX);
1250932e 563 err = snd_pcm_update_state(substream, runtime);
1da177e4
LT		 564 }
565 snd_pcm_stream_unlock_irq(substream);
1250932e 566 return err;
1da177e4
LT		 567}
568
877211f5
TI		 569static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
570 struct snd_pcm_sw_params __user * _params)
1da177e4 571{
877211f5 572 struct snd_pcm_sw_params params;
1da177e4
LT		 573 int err;
574 if (copy_from_user(&params, _params, sizeof(params)))
575 return -EFAULT;
576 err = snd_pcm_sw_params(substream, &params);
577 if (copy_to_user(_params, &params, sizeof(params)))
578 return -EFAULT;
579 return err;
580}
581
877211f5
TI		 582int snd_pcm_status(struct snd_pcm_substream *substream,
583 struct snd_pcm_status *status)
1da177e4 584{
877211f5 585 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 586
587 snd_pcm_stream_lock_irq(substream);
588 status->state = runtime->status->state;
589 status->suspended_state = runtime->status->suspended_state;
590 if (status->state == SNDRV_PCM_STATE_OPEN)
591 goto _end;
592 status->trigger_tstamp = runtime->trigger_tstamp;
8c121586 593 if (snd_pcm_running(substream)) {
1da177e4 594 snd_pcm_update_hw_ptr(substream);
8c121586
JK		 595 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
596 status->tstamp = runtime->status->tstamp;
597 goto _tstamp_end;
598 }
599 }
a713b583 600 snd_pcm_gettime(runtime, &status->tstamp);
8c121586 601 _tstamp_end:
1da177e4
LT		 602 status->appl_ptr = runtime->control->appl_ptr;
603 status->hw_ptr = runtime->status->hw_ptr;
604 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
605 status->avail = snd_pcm_playback_avail(runtime);
606 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
4bbe1ddf 607 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1da177e4 608 status->delay = runtime->buffer_size - status->avail;
4bbe1ddf
TI		 609 status->delay += runtime->delay;
610 } else
1da177e4
LT		 611 status->delay = 0;
612 } else {
613 status->avail = snd_pcm_capture_avail(runtime);
614 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
4bbe1ddf 615 status->delay = status->avail + runtime->delay;
1da177e4
LT		 616 else
617 status->delay = 0;
618 }
619 status->avail_max = runtime->avail_max;
620 status->overrange = runtime->overrange;
621 runtime->avail_max = 0;
622 runtime->overrange = 0;
623 _end:
624 snd_pcm_stream_unlock_irq(substream);
625 return 0;
626}
627
877211f5
TI		 628static int snd_pcm_status_user(struct snd_pcm_substream *substream,
629 struct snd_pcm_status __user * _status)
1da177e4 630{
877211f5 631 struct snd_pcm_status status;
1da177e4
LT		 632 int res;
633
1da177e4
LT		 634 memset(&status, 0, sizeof(status));
635 res = snd_pcm_status(substream, &status);
636 if (res < 0)
637 return res;
638 if (copy_to_user(_status, &status, sizeof(status)))
639 return -EFAULT;
640 return 0;
641}
642
877211f5
TI		 643static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
644 struct snd_pcm_channel_info * info)
1da177e4 645{
877211f5 646 struct snd_pcm_runtime *runtime;
1da177e4
LT		 647 unsigned int channel;
648
1da177e4
LT		 649 channel = info->channel;
650 runtime = substream->runtime;
651 snd_pcm_stream_lock_irq(substream);
652 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
653 snd_pcm_stream_unlock_irq(substream);
654 return -EBADFD;
655 }
656 snd_pcm_stream_unlock_irq(substream);
657 if (channel >= runtime->channels)
658 return -EINVAL;
659 memset(info, 0, sizeof(*info));
660 info->channel = channel;
661 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
662}
663
877211f5
TI		 664static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
665 struct snd_pcm_channel_info __user * _info)
1da177e4 666{
877211f5 667 struct snd_pcm_channel_info info;
1da177e4
LT		 668 int res;
669
670 if (copy_from_user(&info, _info, sizeof(info)))
671 return -EFAULT;
672 res = snd_pcm_channel_info(substream, &info);
673 if (res < 0)
674 return res;
675 if (copy_to_user(_info, &info, sizeof(info)))
676 return -EFAULT;
677 return 0;
678}
679
877211f5 680static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
1da177e4 681{
877211f5 682 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 683 if (runtime->trigger_master == NULL)
684 return;
685 if (runtime->trigger_master == substream) {
b751eef1 686 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1da177e4
LT		 687 } else {
688 snd_pcm_trigger_tstamp(runtime->trigger_master);
689 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
690 }
691 runtime->trigger_master = NULL;
692}
693
694struct action_ops {
877211f5
TI		 695 int (*pre_action)(struct snd_pcm_substream *substream, int state);
696 int (*do_action)(struct snd_pcm_substream *substream, int state);
697 void (*undo_action)(struct snd_pcm_substream *substream, int state);
698 void (*post_action)(struct snd_pcm_substream *substream, int state);
1da177e4
LT		 699};
700
701/*
702 * this functions is core for handling of linked stream
703 * Note: the stream state might be changed also on failure
704 * Note2: call with calling stream lock + link lock
705 */
706static int snd_pcm_action_group(struct action_ops *ops,
877211f5 707 struct snd_pcm_substream *substream,
1da177e4
LT		 708 int state, int do_lock)
709{
877211f5
TI		 710 struct snd_pcm_substream *s = NULL;
711 struct snd_pcm_substream *s1;
1da177e4
LT		 712 int res = 0;
713
ef991b95 714 snd_pcm_group_for_each_entry(s, substream) {
1da177e4 715 if (do_lock && s != substream)
208eee2a
FD		 716 spin_lock_nested(&s->self_group.lock,
717 SINGLE_DEPTH_NESTING);
1da177e4
LT		 718 res = ops->pre_action(s, state);
719 if (res < 0)
720 goto _unlock;
721 }
ef991b95 722 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 723 res = ops->do_action(s, state);
724 if (res < 0) {
725 if (ops->undo_action) {
ef991b95 726 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 727 if (s1 == s) /* failed stream */
728 break;
729 ops->undo_action(s1, state);
730 }
731 }
732 s = NULL; /* unlock all */
733 goto _unlock;
734 }
735 }
ef991b95 736 snd_pcm_group_for_each_entry(s, substream) {
1da177e4
LT		 737 ops->post_action(s, state);
738 }
739 _unlock:
740 if (do_lock) {
741 /* unlock streams */
ef991b95 742 snd_pcm_group_for_each_entry(s1, substream) {
1da177e4
LT		 743 if (s1 != substream)
744 spin_unlock(&s1->self_group.lock);
745 if (s1 == s) /* end */
746 break;
747 }
748 }
749 return res;
750}
751
752/*
753 * Note: call with stream lock
754 */
755static int snd_pcm_action_single(struct action_ops *ops,
877211f5 756 struct snd_pcm_substream *substream,
1da177e4
LT		 757 int state)
758{
759 int res;
760
761 res = ops->pre_action(substream, state);
762 if (res < 0)
763 return res;
764 res = ops->do_action(substream, state);
765 if (res == 0)
766 ops->post_action(substream, state);
767 else if (ops->undo_action)
768 ops->undo_action(substream, state);
769 return res;
770}
771
772/*
773 * Note: call with stream lock
774 */
775static int snd_pcm_action(struct action_ops *ops,
877211f5 776 struct snd_pcm_substream *substream,
1da177e4
LT		 777 int state)
778{
779 int res;
780
781 if (snd_pcm_stream_linked(substream)) {
782 if (!spin_trylock(&substream->group->lock)) {
783 spin_unlock(&substream->self_group.lock);
784 spin_lock(&substream->group->lock);
785 spin_lock(&substream->self_group.lock);
786 }
787 res = snd_pcm_action_group(ops, substream, state, 1);
788 spin_unlock(&substream->group->lock);
789 } else {
790 res = snd_pcm_action_single(ops, substream, state);
791 }
792 return res;
793}
794
795/*
796 * Note: don't use any locks before
797 */
798static int snd_pcm_action_lock_irq(struct action_ops *ops,
877211f5 799 struct snd_pcm_substream *substream,
1da177e4
LT		 800 int state)
801{
802 int res;
803
804 read_lock_irq(&snd_pcm_link_rwlock);
805 if (snd_pcm_stream_linked(substream)) {
806 spin_lock(&substream->group->lock);
807 spin_lock(&substream->self_group.lock);
808 res = snd_pcm_action_group(ops, substream, state, 1);
809 spin_unlock(&substream->self_group.lock);
810 spin_unlock(&substream->group->lock);
811 } else {
812 spin_lock(&substream->self_group.lock);
813 res = snd_pcm_action_single(ops, substream, state);
814 spin_unlock(&substream->self_group.lock);
815 }
816 read_unlock_irq(&snd_pcm_link_rwlock);
817 return res;
818}
819
820/*
821 */
822static int snd_pcm_action_nonatomic(struct action_ops *ops,
877211f5 823 struct snd_pcm_substream *substream,
1da177e4
LT		 824 int state)
825{
826 int res;
827
828 down_read(&snd_pcm_link_rwsem);
829 if (snd_pcm_stream_linked(substream))
830 res = snd_pcm_action_group(ops, substream, state, 0);
831 else
832 res = snd_pcm_action_single(ops, substream, state);
833 up_read(&snd_pcm_link_rwsem);
834 return res;
835}
836
837/*
838 * start callbacks
839 */
877211f5 840static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
1da177e4 841{
877211f5 842 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 843 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
844 return -EBADFD;
845 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
846 !snd_pcm_playback_data(substream))
847 return -EPIPE;
848 runtime->trigger_master = substream;
849 return 0;
850}
851
877211f5 852static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 853{
854 if (substream->runtime->trigger_master != substream)
855 return 0;
856 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
857}
858
877211f5 859static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 860{
861 if (substream->runtime->trigger_master == substream)
862 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
863}
864
877211f5 865static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
1da177e4 866{
877211f5 867 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4 868 snd_pcm_trigger_tstamp(substream);
6af3fb72 869 runtime->hw_ptr_jiffies = jiffies;
bd76af0f
JK		 870 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
871 runtime->rate;
1da177e4
LT		 872 runtime->status->state = state;
873 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
874 runtime->silence_size > 0)
875 snd_pcm_playback_silence(substream, ULONG_MAX);
1da177e4 876 if (substream->timer)
877211f5
TI		 877 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
878 &runtime->trigger_tstamp);
1da177e4
LT		 879}
880
881static struct action_ops snd_pcm_action_start = {
882 .pre_action = snd_pcm_pre_start,
883 .do_action = snd_pcm_do_start,
884 .undo_action = snd_pcm_undo_start,
885 .post_action = snd_pcm_post_start
886};
887
888/**
1c85cc64 889 * snd_pcm_start - start all linked streams
df8db936 890 * @substream: the PCM substream instance
1da177e4 891 */
877211f5 892int snd_pcm_start(struct snd_pcm_substream *substream)
1da177e4 893{
877211f5
TI		 894 return snd_pcm_action(&snd_pcm_action_start, substream,
895 SNDRV_PCM_STATE_RUNNING);
1da177e4
LT		 896}
897
898/*
899 * stop callbacks
900 */
877211f5 901static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
1da177e4 902{
877211f5 903 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 904 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
905 return -EBADFD;
906 runtime->trigger_master = substream;
907 return 0;
908}
909
877211f5 910static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 911{
912 if (substream->runtime->trigger_master == substream &&
913 snd_pcm_running(substream))
914 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
915 return 0; /* unconditonally stop all substreams */
916}
917
877211f5 918static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
1da177e4 919{
877211f5 920 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 921 if (runtime->status->state != state) {
922 snd_pcm_trigger_tstamp(substream);
923 if (substream->timer)
877211f5
TI		 924 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
925 &runtime->trigger_tstamp);
1da177e4 926 runtime->status->state = state;
1da177e4
LT		 927 }
928 wake_up(&runtime->sleep);
c91a988d 929 wake_up(&runtime->tsleep);
1da177e4
LT		 930}
931
932static struct action_ops snd_pcm_action_stop = {
933 .pre_action = snd_pcm_pre_stop,
934 .do_action = snd_pcm_do_stop,
935 .post_action = snd_pcm_post_stop
936};
937
938/**
1c85cc64 939 * snd_pcm_stop - try to stop all running streams in the substream group
df8db936
TI		 940 * @substream: the PCM substream instance
941 * @state: PCM state after stopping the stream
1da177e4 942 *
1c85cc64 943 * The state of each stream is then changed to the given state unconditionally.
1da177e4 944 */
fea952e5 945int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
1da177e4
LT		 946{
947 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
948}
949
e88e8ae6
TI		 950EXPORT_SYMBOL(snd_pcm_stop);
951
1da177e4 952/**
1c85cc64 953 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
df8db936 954 * @substream: the PCM substream
1da177e4 955 *
1c85cc64 956 * After stopping, the state is changed to SETUP.
1da177e4
LT		 957 * Unlike snd_pcm_stop(), this affects only the given stream.
958 */
877211f5 959int snd_pcm_drain_done(struct snd_pcm_substream *substream)
1da177e4 960{
877211f5
TI		 961 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
962 SNDRV_PCM_STATE_SETUP);
1da177e4
LT		 963}
964
965/*
966 * pause callbacks
967 */
877211f5 968static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
1da177e4 969{
877211f5 970 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 971 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
972 return -ENOSYS;
973 if (push) {
974 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
975 return -EBADFD;
976 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
977 return -EBADFD;
978 runtime->trigger_master = substream;
979 return 0;
980}
981
877211f5 982static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 983{
984 if (substream->runtime->trigger_master != substream)
985 return 0;
56385a12
JK		 986 /* some drivers might use hw_ptr to recover from the pause -
987 update the hw_ptr now */
988 if (push)
989 snd_pcm_update_hw_ptr(substream);
6af3fb72 990 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
b595076a 991 * a delta between the current jiffies, this gives a large enough
6af3fb72
TI		 992 * delta, effectively to skip the check once.
993 */
994 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1da177e4
LT		 995 return substream->ops->trigger(substream,
996 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
997 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
998}
999
877211f5 1000static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1001{
1002 if (substream->runtime->trigger_master == substream)
1003 substream->ops->trigger(substream,
1004 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1005 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1006}
1007
877211f5 1008static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1da177e4 1009{
877211f5 1010 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1011 snd_pcm_trigger_tstamp(substream);
1012 if (push) {
1013 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1014 if (substream->timer)
877211f5
TI		 1015 snd_timer_notify(substream->timer,
1016 SNDRV_TIMER_EVENT_MPAUSE,
1017 &runtime->trigger_tstamp);
1da177e4 1018 wake_up(&runtime->sleep);
c91a988d 1019 wake_up(&runtime->tsleep);
1da177e4
LT		 1020 } else {
1021 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1da177e4 1022 if (substream->timer)
877211f5
TI		 1023 snd_timer_notify(substream->timer,
1024 SNDRV_TIMER_EVENT_MCONTINUE,
1025 &runtime->trigger_tstamp);
1da177e4
LT		 1026 }
1027}
1028
1029static struct action_ops snd_pcm_action_pause = {
1030 .pre_action = snd_pcm_pre_pause,
1031 .do_action = snd_pcm_do_pause,
1032 .undo_action = snd_pcm_undo_pause,
1033 .post_action = snd_pcm_post_pause
1034};
1035
1036/*
1037 * Push/release the pause for all linked streams.
1038 */
877211f5 1039static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1da177e4
LT		 1040{
1041 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1042}
1043
1044#ifdef CONFIG_PM
1045/* suspend */
1046
877211f5 1047static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1048{
877211f5 1049 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1050 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1051 return -EBUSY;
1052 runtime->trigger_master = substream;
1053 return 0;
1054}
1055
877211f5 1056static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1057{
877211f5 1058 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1059 if (runtime->trigger_master != substream)
1060 return 0;
1061 if (! snd_pcm_running(substream))
1062 return 0;
1063 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1064 return 0; /* suspend unconditionally */
1065}
1066
877211f5 1067static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1da177e4 1068{
877211f5 1069 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1070 snd_pcm_trigger_tstamp(substream);
1071 if (substream->timer)
877211f5
TI		 1072 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1073 &runtime->trigger_tstamp);
1da177e4
LT		 1074 runtime->status->suspended_state = runtime->status->state;
1075 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1da177e4 1076 wake_up(&runtime->sleep);
c91a988d 1077 wake_up(&runtime->tsleep);
1da177e4
LT		 1078}
1079
1080static struct action_ops snd_pcm_action_suspend = {
1081 .pre_action = snd_pcm_pre_suspend,
1082 .do_action = snd_pcm_do_suspend,
1083 .post_action = snd_pcm_post_suspend
1084};
1085
1086/**
1c85cc64 1087 * snd_pcm_suspend - trigger SUSPEND to all linked streams
df8db936 1088 * @substream: the PCM substream
1da177e4 1089 *
1da177e4
LT		 1090 * After this call, all streams are changed to SUSPENDED state.
1091 */
877211f5 1092int snd_pcm_suspend(struct snd_pcm_substream *substream)
1da177e4
LT		 1093{
1094 int err;
1095 unsigned long flags;
1096
603bf524
TI		 1097 if (! substream)
1098 return 0;
1099
1da177e4
LT		 1100 snd_pcm_stream_lock_irqsave(substream, flags);
1101 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1102 snd_pcm_stream_unlock_irqrestore(substream, flags);
1103 return err;
1104}
1105
e88e8ae6
TI		 1106EXPORT_SYMBOL(snd_pcm_suspend);
1107
1da177e4 1108/**
1c85cc64 1109 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
df8db936 1110 * @pcm: the PCM instance
1da177e4 1111 *
1da177e4
LT		 1112 * After this call, all streams are changed to SUSPENDED state.
1113 */
877211f5 1114int snd_pcm_suspend_all(struct snd_pcm *pcm)
1da177e4 1115{
877211f5 1116 struct snd_pcm_substream *substream;
1da177e4
LT		 1117 int stream, err = 0;
1118
603bf524
TI		 1119 if (! pcm)
1120 return 0;
1121
1da177e4 1122 for (stream = 0; stream < 2; stream++) {
877211f5
TI		 1123 for (substream = pcm->streams[stream].substream;
1124 substream; substream = substream->next) {
1da177e4
LT		 1125 /* FIXME: the open/close code should lock this as well */
1126 if (substream->runtime == NULL)
1127 continue;
1128 err = snd_pcm_suspend(substream);
1129 if (err < 0 && err != -EBUSY)
1130 return err;
1131 }
1132 }
1133 return 0;
1134}
1135
e88e8ae6
TI		 1136EXPORT_SYMBOL(snd_pcm_suspend_all);
1137
1da177e4
LT		 1138/* resume */
1139
877211f5 1140static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1141{
877211f5 1142 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1143 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1144 return -ENOSYS;
1145 runtime->trigger_master = substream;
1146 return 0;
1147}
1148
877211f5 1149static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1150{
877211f5 1151 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1152 if (runtime->trigger_master != substream)
1153 return 0;
1154 /* DMA not running previously? */
1155 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1156 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1157 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1158 return 0;
1159 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1160}
1161
877211f5 1162static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1163{
1164 if (substream->runtime->trigger_master == substream &&
1165 snd_pcm_running(substream))
1166 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1167}
1168
877211f5 1169static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1da177e4 1170{
877211f5 1171 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1172 snd_pcm_trigger_tstamp(substream);
1173 if (substream->timer)
877211f5
TI		 1174 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1175 &runtime->trigger_tstamp);
1da177e4 1176 runtime->status->state = runtime->status->suspended_state;
1da177e4
LT		 1177}
1178
1179static struct action_ops snd_pcm_action_resume = {
1180 .pre_action = snd_pcm_pre_resume,
1181 .do_action = snd_pcm_do_resume,
1182 .undo_action = snd_pcm_undo_resume,
1183 .post_action = snd_pcm_post_resume
1184};
1185
877211f5 1186static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4 1187{
877211f5 1188 struct snd_card *card = substream->pcm->card;
1da177e4
LT		 1189 int res;
1190
1191 snd_power_lock(card);
cbac4b0c 1192 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1da177e4
LT		 1193 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1194 snd_power_unlock(card);
1195 return res;
1196}
1197
1198#else
1199
877211f5 1200static int snd_pcm_resume(struct snd_pcm_substream *substream)
1da177e4
LT		 1201{
1202 return -ENOSYS;
1203}
1204
1205#endif /* CONFIG_PM */
1206
1207/*
1208 * xrun ioctl
1209 *
1210 * Change the RUNNING stream(s) to XRUN state.
1211 */
877211f5 1212static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1da177e4 1213{
877211f5
TI		 1214 struct snd_card *card = substream->pcm->card;
1215 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1216 int result;
1217
1218 snd_power_lock(card);
1219 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1220 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1da177e4
LT		 1221 if (result < 0)
1222 goto _unlock;
1223 }
1224
1225 snd_pcm_stream_lock_irq(substream);
1226 switch (runtime->status->state) {
1227 case SNDRV_PCM_STATE_XRUN:
1228 result = 0; /* already there */
1229 break;
1230 case SNDRV_PCM_STATE_RUNNING:
1231 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1232 break;
1233 default:
1234 result = -EBADFD;
1235 }
1236 snd_pcm_stream_unlock_irq(substream);
1237 _unlock:
1238 snd_power_unlock(card);
1239 return result;
1240}
1241
1242/*
1243 * reset ioctl
1244 */
877211f5 1245static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1246{
877211f5 1247 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1248 switch (runtime->status->state) {
1249 case SNDRV_PCM_STATE_RUNNING:
1250 case SNDRV_PCM_STATE_PREPARED:
1251 case SNDRV_PCM_STATE_PAUSED:
1252 case SNDRV_PCM_STATE_SUSPENDED:
1253 return 0;
1254 default:
1255 return -EBADFD;
1256 }
1257}
1258
877211f5 1259static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1260{
877211f5 1261 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1262 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1263 if (err < 0)
1264 return err;
1da177e4 1265 runtime->hw_ptr_base = 0;
e7636925
JK		 1266 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1267 runtime->status->hw_ptr % runtime->period_size;
1da177e4
LT		 1268 runtime->silence_start = runtime->status->hw_ptr;
1269 runtime->silence_filled = 0;
1270 return 0;
1271}
1272
877211f5 1273static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1da177e4 1274{
877211f5 1275 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1276 runtime->control->appl_ptr = runtime->status->hw_ptr;
1277 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1278 runtime->silence_size > 0)
1279 snd_pcm_playback_silence(substream, ULONG_MAX);
1280}
1281
1282static struct action_ops snd_pcm_action_reset = {
1283 .pre_action = snd_pcm_pre_reset,
1284 .do_action = snd_pcm_do_reset,
1285 .post_action = snd_pcm_post_reset
1286};
1287
877211f5 1288static int snd_pcm_reset(struct snd_pcm_substream *substream)
1da177e4
LT		 1289{
1290 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1291}
1292
1293/*
1294 * prepare ioctl
1295 */
0df63e44
TI		 1296/* we use the second argument for updating f_flags */
1297static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1298 int f_flags)
1da177e4 1299{
877211f5 1300 struct snd_pcm_runtime *runtime = substream->runtime;
de1b8b93
TI		 1301 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1302 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1da177e4
LT		 1303 return -EBADFD;
1304 if (snd_pcm_running(substream))
1305 return -EBUSY;
0df63e44 1306 substream->f_flags = f_flags;
1da177e4
LT		 1307 return 0;
1308}
1309
877211f5 1310static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1311{
1312 int err;
1313 err = substream->ops->prepare(substream);
1314 if (err < 0)
1315 return err;
1316 return snd_pcm_do_reset(substream, 0);
1317}
1318
877211f5 1319static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1da177e4 1320{
877211f5 1321 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1322 runtime->control->appl_ptr = runtime->status->hw_ptr;
1323 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1324}
1325
1326static struct action_ops snd_pcm_action_prepare = {
1327 .pre_action = snd_pcm_pre_prepare,
1328 .do_action = snd_pcm_do_prepare,
1329 .post_action = snd_pcm_post_prepare
1330};
1331
1332/**
1c85cc64 1333 * snd_pcm_prepare - prepare the PCM substream to be triggerable
df8db936 1334 * @substream: the PCM substream instance
0df63e44 1335 * @file: file to refer f_flags
1da177e4 1336 */
0df63e44
TI		 1337static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1338 struct file *file)
1da177e4
LT		 1339{
1340 int res;
877211f5 1341 struct snd_card *card = substream->pcm->card;
0df63e44
TI		 1342 int f_flags;
1343
1344 if (file)
1345 f_flags = file->f_flags;
1346 else
1347 f_flags = substream->f_flags;
1da177e4
LT		 1348
1349 snd_power_lock(card);
cbac4b0c 1350 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
0df63e44
TI		 1351 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1352 substream, f_flags);
1da177e4
LT		 1353 snd_power_unlock(card);
1354 return res;
1355}
1356
1357/*
1358 * drain ioctl
1359 */
1360
877211f5 1361static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1362{
1da177e4
LT		 1363 substream->runtime->trigger_master = substream;
1364 return 0;
1365}
1366
877211f5 1367static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4 1368{
877211f5 1369 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 1370 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1371 switch (runtime->status->state) {
1372 case SNDRV_PCM_STATE_PREPARED:
1373 /* start playback stream if possible */
1374 if (! snd_pcm_playback_empty(substream)) {
1375 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1376 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1377 }
1378 break;
1379 case SNDRV_PCM_STATE_RUNNING:
1380 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1381 break;
1382 default:
1383 break;
1384 }
1385 } else {
1386 /* stop running stream */
1387 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
b05e5787 1388 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1da177e4 1389 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
b05e5787
MŚ		 1390 snd_pcm_do_stop(substream, new_state);
1391 snd_pcm_post_stop(substream, new_state);
1da177e4
LT		 1392 }
1393 }
1394 return 0;
1395}
1396
877211f5 1397static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1da177e4
LT		 1398{
1399}
1400
1401static struct action_ops snd_pcm_action_drain_init = {
1402 .pre_action = snd_pcm_pre_drain_init,
1403 .do_action = snd_pcm_do_drain_init,
1404 .post_action = snd_pcm_post_drain_init
1405};
1406
877211f5 1407static int snd_pcm_drop(struct snd_pcm_substream *substream);
1da177e4
LT		 1408
1409/*
1410 * Drain the stream(s).
1411 * When the substream is linked, sync until the draining of all playback streams
1412 * is finished.
1413 * After this call, all streams are supposed to be either SETUP or DRAINING
1414 * (capture only) state.
1415 */
4cdc115f
TI		 1416static int snd_pcm_drain(struct snd_pcm_substream *substream,
1417 struct file *file)
1da177e4 1418{
877211f5
TI		 1419 struct snd_card *card;
1420 struct snd_pcm_runtime *runtime;
ef991b95 1421 struct snd_pcm_substream *s;
d3a7dcfe 1422 wait_queue_t wait;
1da177e4 1423 int result = 0;
4cdc115f 1424 int nonblock = 0;
1da177e4 1425
1da177e4
LT		 1426 card = substream->pcm->card;
1427 runtime = substream->runtime;
1428
1429 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1430 return -EBADFD;
1431
1da177e4
LT		 1432 snd_power_lock(card);
1433 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
cbac4b0c 1434 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
21cb2a2e
TI		 1435 if (result < 0) {
1436 snd_power_unlock(card);
1437 return result;
1438 }
1da177e4
LT		 1439 }
1440
4cdc115f
TI		 1441 if (file) {
1442 if (file->f_flags & O_NONBLOCK)
1443 nonblock = 1;
1444 } else if (substream->f_flags & O_NONBLOCK)
1445 nonblock = 1;
1446
21cb2a2e 1447 down_read(&snd_pcm_link_rwsem);
21cb2a2e
TI		 1448 snd_pcm_stream_lock_irq(substream);
1449 /* resume pause */
d3a7dcfe 1450 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
21cb2a2e
TI		 1451 snd_pcm_pause(substream, 0);
1452
1453 /* pre-start/stop - all running streams are changed to DRAINING state */
1454 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
4cdc115f
TI		 1455 if (result < 0)
1456 goto unlock;
1457 /* in non-blocking, we don't wait in ioctl but let caller poll */
1458 if (nonblock) {
1459 result = -EAGAIN;
1460 goto unlock;
21cb2a2e 1461 }
1da177e4
LT		 1462
1463 for (;;) {
1464 long tout;
d3a7dcfe 1465 struct snd_pcm_runtime *to_check;
1da177e4
LT		 1466 if (signal_pending(current)) {
1467 result = -ERESTARTSYS;
1468 break;
1469 }
d3a7dcfe
TI		 1470 /* find a substream to drain */
1471 to_check = NULL;
1472 snd_pcm_group_for_each_entry(s, substream) {
1473 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1474 continue;
1475 runtime = s->runtime;
1476 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1477 to_check = runtime;
21cb2a2e 1478 break;
d3a7dcfe 1479 }
21cb2a2e 1480 }
d3a7dcfe
TI		 1481 if (!to_check)
1482 break; /* all drained */
1483 init_waitqueue_entry(&wait, current);
1484 add_wait_queue(&to_check->sleep, &wait);
1da177e4 1485 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1486 up_read(&snd_pcm_link_rwsem);
1da177e4 1487 snd_power_unlock(card);
f2b3614c
TI		 1488 if (runtime->no_period_wakeup)
1489 tout = MAX_SCHEDULE_TIMEOUT;
1490 else {
1491 tout = 10;
1492 if (runtime->rate) {
1493 long t = runtime->period_size * 2 / runtime->rate;
1494 tout = max(t, tout);
1495 }
1496 tout = msecs_to_jiffies(tout * 1000);
1497 }
1498 tout = schedule_timeout_interruptible(tout);
1da177e4 1499 snd_power_lock(card);
d3a7dcfe 1500 down_read(&snd_pcm_link_rwsem);
1da177e4 1501 snd_pcm_stream_lock_irq(substream);
d3a7dcfe 1502 remove_wait_queue(&to_check->sleep, &wait);
1da177e4
LT		 1503 if (tout == 0) {
1504 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1505 result = -ESTRPIPE;
1506 else {
1507 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1508 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1509 result = -EIO;
1510 }
1511 break;
1512 }
1da177e4 1513 }
21cb2a2e 1514
4cdc115f 1515 unlock:
21cb2a2e 1516 snd_pcm_stream_unlock_irq(substream);
d3a7dcfe 1517 up_read(&snd_pcm_link_rwsem);
1da177e4 1518 snd_power_unlock(card);
1da177e4
LT		 1519
1520 return result;
1521}
1522
1523/*
1524 * drop ioctl
1525 *
1526 * Immediately put all linked substreams into SETUP state.
1527 */
877211f5 1528static int snd_pcm_drop(struct snd_pcm_substream *substream)
1da177e4 1529{
877211f5 1530 struct snd_pcm_runtime *runtime;
1da177e4
LT		 1531 int result = 0;
1532
7eaa943c
TI		 1533 if (PCM_RUNTIME_CHECK(substream))
1534 return -ENXIO;
1da177e4 1535 runtime = substream->runtime;
1da177e4 1536
de1b8b93 1537 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
24e8fc49
TI		 1538 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1539 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1da177e4
LT		 1540 return -EBADFD;
1541
1da177e4
LT		 1542 snd_pcm_stream_lock_irq(substream);
1543 /* resume pause */
1544 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1545 snd_pcm_pause(substream, 0);
1546
1547 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1548 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1549 snd_pcm_stream_unlock_irq(substream);
24e8fc49 1550
1da177e4
LT		 1551 return result;
1552}
1553
1554
1555/* WARNING: Don't forget to fput back the file */
1da177e4
LT		 1556static struct file *snd_pcm_file_fd(int fd)
1557{
1558 struct file *file;
1559 struct inode *inode;
f87135f5
CL		 1560 unsigned int minor;
1561
1da177e4
LT		 1562 file = fget(fd);
1563 if (!file)
1564 return NULL;
7bc56323 1565 inode = file->f_path.dentry->d_inode;
1da177e4
LT		 1566 if (!S_ISCHR(inode->i_mode) ||
1567 imajor(inode) != snd_major) {
1568 fput(file);
1569 return NULL;
1570 }
1571 minor = iminor(inode);
f87135f5
CL		 1572 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1573 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1da177e4
LT		 1574 fput(file);
1575 return NULL;
1576 }
1577 return file;
1578}
1579
1580/*
1581 * PCM link handling
1582 */
877211f5 1583static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1da177e4
LT		 1584{
1585 int res = 0;
1586 struct file *file;
877211f5
TI		 1587 struct snd_pcm_file *pcm_file;
1588 struct snd_pcm_substream *substream1;
1662591b 1589 struct snd_pcm_group *group;
1da177e4
LT		 1590
1591 file = snd_pcm_file_fd(fd);
1592 if (!file)
1593 return -EBADFD;
1594 pcm_file = file->private_data;
1595 substream1 = pcm_file->substream;
1662591b
TI		 1596 group = kmalloc(sizeof(*group), GFP_KERNEL);
1597 if (!group) {
1598 res = -ENOMEM;
1599 goto _nolock;
1600 }
1da177e4
LT		 1601 down_write(&snd_pcm_link_rwsem);
1602 write_lock_irq(&snd_pcm_link_rwlock);
1603 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1604 substream->runtime->status->state != substream1->runtime->status->state) {
1605 res = -EBADFD;
1606 goto _end;
1607 }
1608 if (snd_pcm_stream_linked(substream1)) {
1609 res = -EALREADY;
1610 goto _end;
1611 }
1612 if (!snd_pcm_stream_linked(substream)) {
1662591b 1613 substream->group = group;
1da177e4
LT		 1614 spin_lock_init(&substream->group->lock);
1615 INIT_LIST_HEAD(&substream->group->substreams);
1616 list_add_tail(&substream->link_list, &substream->group->substreams);
1617 substream->group->count = 1;
1618 }
1619 list_add_tail(&substream1->link_list, &substream->group->substreams);
1620 substream->group->count++;
1621 substream1->group = substream->group;
1622 _end:
1623 write_unlock_irq(&snd_pcm_link_rwlock);
1624 up_write(&snd_pcm_link_rwsem);
1662591b 1625 _nolock:
1da177e4 1626 fput(file);
1662591b
TI		 1627 if (res < 0)
1628 kfree(group);
1da177e4
LT		 1629 return res;
1630}
1631
877211f5 1632static void relink_to_local(struct snd_pcm_substream *substream)
1da177e4
LT		 1633{
1634 substream->group = &substream->self_group;
1635 INIT_LIST_HEAD(&substream->self_group.substreams);
1636 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1637}
1638
877211f5 1639static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1da177e4 1640{
ef991b95 1641 struct snd_pcm_substream *s;
1da177e4
LT		 1642 int res = 0;
1643
1644 down_write(&snd_pcm_link_rwsem);
1645 write_lock_irq(&snd_pcm_link_rwlock);
1646 if (!snd_pcm_stream_linked(substream)) {
1647 res = -EALREADY;
1648 goto _end;
1649 }
1650 list_del(&substream->link_list);
1651 substream->group->count--;
1652 if (substream->group->count == 1) { /* detach the last stream, too */
ef991b95
TI		 1653 snd_pcm_group_for_each_entry(s, substream) {
1654 relink_to_local(s);
1da177e4
LT		 1655 break;
1656 }
1657 kfree(substream->group);
1658 }
1659 relink_to_local(substream);
1660 _end:
1661 write_unlock_irq(&snd_pcm_link_rwlock);
1662 up_write(&snd_pcm_link_rwsem);
1663 return res;
1664}
1665
1666/*
1667 * hw configurator
1668 */
877211f5
TI		 1669static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1670 struct snd_pcm_hw_rule *rule)
1da177e4 1671{
877211f5 1672 struct snd_interval t;
1da177e4
LT		 1673 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1674 hw_param_interval_c(params, rule->deps[1]), &t);
1675 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1676}
1677
877211f5
TI		 1678static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1679 struct snd_pcm_hw_rule *rule)
1da177e4 1680{
877211f5 1681 struct snd_interval t;
1da177e4
LT		 1682 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1683 hw_param_interval_c(params, rule->deps[1]), &t);
1684 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1685}
1686
877211f5
TI		 1687static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1688 struct snd_pcm_hw_rule *rule)
1da177e4 1689{
877211f5 1690 struct snd_interval t;
1da177e4
LT		 1691 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1692 hw_param_interval_c(params, rule->deps[1]),
1693 (unsigned long) rule->private, &t);
1694 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1695}
1696
877211f5
TI		 1697static int snd_pcm_hw_rule_mulkdiv(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_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1702 (unsigned long) rule->private,
1703 hw_param_interval_c(params, rule->deps[1]), &t);
1704 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1705}
1706
877211f5
TI		 1707static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1708 struct snd_pcm_hw_rule *rule)
1da177e4
LT		 1709{
1710 unsigned int k;
877211f5
TI		 1711 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1712 struct snd_mask m;
1713 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1714 snd_mask_any(&m);
1715 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1716 int bits;
1717 if (! snd_mask_test(mask, k))
1718 continue;
1719 bits = snd_pcm_format_physical_width(k);
1720 if (bits <= 0)
1721 continue; /* ignore invalid formats */
1722 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1723 snd_mask_reset(&m, k);
1724 }
1725 return snd_mask_refine(mask, &m);
1726}
1727
877211f5
TI		 1728static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1729 struct snd_pcm_hw_rule *rule)
1da177e4 1730{
877211f5 1731 struct snd_interval t;
1da177e4
LT		 1732 unsigned int k;
1733 t.min = UINT_MAX;
1734 t.max = 0;
1735 t.openmin = 0;
1736 t.openmax = 0;
1737 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1738 int bits;
1739 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1740 continue;
1741 bits = snd_pcm_format_physical_width(k);
1742 if (bits <= 0)
1743 continue; /* ignore invalid formats */
1744 if (t.min > (unsigned)bits)
1745 t.min = bits;
1746 if (t.max < (unsigned)bits)
1747 t.max = bits;
1748 }
1749 t.integer = 1;
1750 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1751}
1752
1753#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1754#error "Change this table"
1755#endif
1756
1757static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1758 48000, 64000, 88200, 96000, 176400, 192000 };
1759
7653d557
CL		 1760const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1761 .count = ARRAY_SIZE(rates),
1762 .list = rates,
1763};
1764
877211f5
TI		 1765static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1766 struct snd_pcm_hw_rule *rule)
1da177e4 1767{
877211f5 1768 struct snd_pcm_hardware *hw = rule->private;
1da177e4 1769 return snd_interval_list(hw_param_interval(params, rule->var),
7653d557
CL		 1770 snd_pcm_known_rates.count,
1771 snd_pcm_known_rates.list, hw->rates);
1da177e4
LT		 1772}
1773
877211f5
TI		 1774static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1775 struct snd_pcm_hw_rule *rule)
1da177e4 1776{
877211f5
TI		 1777 struct snd_interval t;
1778 struct snd_pcm_substream *substream = rule->private;
1da177e4
LT		 1779 t.min = 0;
1780 t.max = substream->buffer_bytes_max;
1781 t.openmin = 0;
1782 t.openmax = 0;
1783 t.integer = 1;
1784 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1785}
1786
877211f5 1787int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1da177e4 1788{
877211f5
TI		 1789 struct snd_pcm_runtime *runtime = substream->runtime;
1790 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1da177e4
LT		 1791 int k, err;
1792
1793 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1794 snd_mask_any(constrs_mask(constrs, k));
1795 }
1796
1797 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1798 snd_interval_any(constrs_interval(constrs, k));
1799 }
1800
1801 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1802 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1803 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1804 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1805 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1806
1807 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1808 snd_pcm_hw_rule_format, NULL,
1809 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1810 if (err < 0)
1811 return err;
1812 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1813 snd_pcm_hw_rule_sample_bits, NULL,
1814 SNDRV_PCM_HW_PARAM_FORMAT,
1815 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1816 if (err < 0)
1817 return err;
1818 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1819 snd_pcm_hw_rule_div, NULL,
1820 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1821 if (err < 0)
1822 return err;
1823 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1824 snd_pcm_hw_rule_mul, NULL,
1825 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1826 if (err < 0)
1827 return err;
1828 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1829 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1830 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -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_mulkdiv, (void*) 8,
1835 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1836 if (err < 0)
1837 return err;
1838 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1839 snd_pcm_hw_rule_div, NULL,
1840 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1841 if (err < 0)
1842 return err;
1843 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1844 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1845 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1846 if (err < 0)
1847 return err;
1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1849 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1850 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1851 if (err < 0)
1852 return err;
1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1854 snd_pcm_hw_rule_div, NULL,
1855 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1856 if (err < 0)
1857 return err;
1858 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1859 snd_pcm_hw_rule_div, NULL,
1860 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1861 if (err < 0)
1862 return err;
1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1864 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1865 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -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_muldivk, (void*) 1000000,
1870 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1871 if (err < 0)
1872 return err;
1873 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1874 snd_pcm_hw_rule_mul, NULL,
1875 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1876 if (err < 0)
1877 return err;
1878 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1879 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1880 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -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_muldivk, (void*) 1000000,
1885 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1886 if (err < 0)
1887 return err;
1888 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1889 snd_pcm_hw_rule_muldivk, (void*) 8,
1890 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 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_BYTES,
1894 snd_pcm_hw_rule_muldivk, (void*) 8,
1895 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1896 if (err < 0)
1897 return err;
1898 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1899 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1900 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1901 if (err < 0)
1902 return err;
1903 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1904 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1905 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1906 if (err < 0)
1907 return err;
1908 return 0;
1909}
1910
877211f5 1911int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1da177e4 1912{
877211f5
TI		 1913 struct snd_pcm_runtime *runtime = substream->runtime;
1914 struct snd_pcm_hardware *hw = &runtime->hw;
1da177e4
LT		 1915 int err;
1916 unsigned int mask = 0;
1917
1918 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1919 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1920 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1921 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1922 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1923 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1924 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1925 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1926 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1927 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1928 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1929 }
1930 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
7eaa943c
TI		 1931 if (err < 0)
1932 return err;
1da177e4
LT		 1933
1934 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
7eaa943c
TI		 1935 if (err < 0)
1936 return err;
1da177e4
LT		 1937
1938 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
7eaa943c
TI		 1939 if (err < 0)
1940 return err;
1da177e4
LT		 1941
1942 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1943 hw->channels_min, hw->channels_max);
7eaa943c
TI		 1944 if (err < 0)
1945 return err;
1da177e4
LT		 1946
1947 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1948 hw->rate_min, hw->rate_max);
8b90ca08
GL		 1949 if (err < 0)
1950 return err;
1da177e4
LT		 1951
1952 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1953 hw->period_bytes_min, hw->period_bytes_max);
8b90ca08
GL		 1954 if (err < 0)
1955 return err;
1da177e4
LT		 1956
1957 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1958 hw->periods_min, hw->periods_max);
7eaa943c
TI		 1959 if (err < 0)
1960 return err;
1da177e4
LT		 1961
1962 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1963 hw->period_bytes_min, hw->buffer_bytes_max);
7eaa943c
TI		 1964 if (err < 0)
1965 return err;
1da177e4
LT		 1966
1967 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1968 snd_pcm_hw_rule_buffer_bytes_max, substream,
1969 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1970 if (err < 0)
1971 return err;
1972
1973 /* FIXME: remove */
1974 if (runtime->dma_bytes) {
1975 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
7eaa943c
TI		 1976 if (err < 0)
1977 return -EINVAL;
1da177e4
LT		 1978 }
1979
1980 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1981 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1982 snd_pcm_hw_rule_rate, hw,
1983 SNDRV_PCM_HW_PARAM_RATE, -1);
1984 if (err < 0)
1985 return err;
1986 }
1987
1988 /* FIXME: this belong to lowlevel */
1da177e4
LT		 1989 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1990
1991 return 0;
1992}
1993
3bf75f9b 1994static void pcm_release_private(struct snd_pcm_substream *substream)
1da177e4 1995{
1da177e4 1996 snd_pcm_unlink(substream);
3bf75f9b
TI		 1997}
1998
1999void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2000{
0df63e44
TI		 2001 substream->ref_count--;
2002 if (substream->ref_count > 0)
2003 return;
2004
3bf75f9b 2005 snd_pcm_drop(substream);
3bf75f9b 2006 if (substream->hw_opened) {
1da177e4
LT		 2007 if (substream->ops->hw_free != NULL)
2008 substream->ops->hw_free(substream);
2009 substream->ops->close(substream);
3bf75f9b 2010 substream->hw_opened = 0;
1da177e4 2011 }
8699a0b6
TI		 2012 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2013 pm_qos_remove_request(&substream->latency_pm_qos_req);
1576274d
TI		 2014 if (substream->pcm_release) {
2015 substream->pcm_release(substream);
2016 substream->pcm_release = NULL;
2017 }
3bf75f9b
TI		 2018 snd_pcm_detach_substream(substream);
2019}
2020
e88e8ae6
TI		 2021EXPORT_SYMBOL(snd_pcm_release_substream);
2022
3bf75f9b
TI		 2023int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2024 struct file *file,
2025 struct snd_pcm_substream **rsubstream)
2026{
2027 struct snd_pcm_substream *substream;
2028 int err;
2029
2030 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2031 if (err < 0)
2032 return err;
0df63e44
TI		 2033 if (substream->ref_count > 1) {
2034 *rsubstream = substream;
2035 return 0;
2036 }
2037
3bf75f9b
TI		 2038 err = snd_pcm_hw_constraints_init(substream);
2039 if (err < 0) {
2040 snd_printd("snd_pcm_hw_constraints_init failed\n");
2041 goto error;
2042 }
2043
2044 if ((err = substream->ops->open(substream)) < 0)
2045 goto error;
2046
2047 substream->hw_opened = 1;
2048
2049 err = snd_pcm_hw_constraints_complete(substream);
2050 if (err < 0) {
2051 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2052 goto error;
2053 }
2054
2055 *rsubstream = substream;
1da177e4 2056 return 0;
3bf75f9b
TI		 2057
2058 error:
2059 snd_pcm_release_substream(substream);
2060 return err;
1da177e4
LT		 2061}
2062
e88e8ae6
TI		 2063EXPORT_SYMBOL(snd_pcm_open_substream);
2064
1da177e4 2065static int snd_pcm_open_file(struct file *file,
877211f5 2066 struct snd_pcm *pcm,
ffd3d5c6 2067 int stream)
1da177e4 2068{
877211f5
TI		 2069 struct snd_pcm_file *pcm_file;
2070 struct snd_pcm_substream *substream;
3bf75f9b 2071 int err;
1da177e4 2072
3bf75f9b
TI		 2073 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2074 if (err < 0)
2075 return err;
2076
548a648b
TI		 2077 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2078 if (pcm_file == NULL) {
2079 snd_pcm_release_substream(substream);
2080 return -ENOMEM;
2081 }
2082 pcm_file->substream = substream;
2083 if (substream->ref_count == 1) {
0df63e44
TI		 2084 substream->file = pcm_file;
2085 substream->pcm_release = pcm_release_private;
1da177e4 2086 }
1da177e4 2087 file->private_data = pcm_file;
ffd3d5c6 2088
1da177e4
LT		 2089 return 0;
2090}
2091
f87135f5
CL		 2092static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2093{
2094 struct snd_pcm *pcm;
02f4865f
TI		 2095 int err = nonseekable_open(inode, file);
2096 if (err < 0)
2097 return err;
f87135f5
CL		 2098 pcm = snd_lookup_minor_data(iminor(inode),
2099 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2100 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2101}
2102
2103static int snd_pcm_capture_open(struct inode *inode, struct file *file)
1da177e4 2104{
877211f5 2105 struct snd_pcm *pcm;
02f4865f
TI		 2106 int err = nonseekable_open(inode, file);
2107 if (err < 0)
2108 return err;
f87135f5
CL		 2109 pcm = snd_lookup_minor_data(iminor(inode),
2110 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2111 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2112}
2113
2114static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2115{
2116 int err;
1da177e4
LT		 2117 wait_queue_t wait;
2118
1da177e4
LT		 2119 if (pcm == NULL) {
2120 err = -ENODEV;
2121 goto __error1;
2122 }
2123 err = snd_card_file_add(pcm->card, file);
2124 if (err < 0)
2125 goto __error1;
2126 if (!try_module_get(pcm->card->module)) {
2127 err = -EFAULT;
2128 goto __error2;
2129 }
2130 init_waitqueue_entry(&wait, current);
2131 add_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2132 mutex_lock(&pcm->open_mutex);
1da177e4 2133 while (1) {
ffd3d5c6 2134 err = snd_pcm_open_file(file, pcm, stream);
1da177e4
LT		 2135 if (err >= 0)
2136 break;
2137 if (err == -EAGAIN) {
2138 if (file->f_flags & O_NONBLOCK) {
2139 err = -EBUSY;
2140 break;
2141 }
2142 } else
2143 break;
2144 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 2145 mutex_unlock(&pcm->open_mutex);
1da177e4 2146 schedule();
1a60d4c5 2147 mutex_lock(&pcm->open_mutex);
1da177e4
LT		 2148 if (signal_pending(current)) {
2149 err = -ERESTARTSYS;
2150 break;
2151 }
2152 }
2153 remove_wait_queue(&pcm->open_wait, &wait);
1a60d4c5 2154 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2155 if (err < 0)
2156 goto __error;
2157 return err;
2158
2159 __error:
2160 module_put(pcm->card->module);
2161 __error2:
2162 snd_card_file_remove(pcm->card, file);
2163 __error1:
2164 return err;
2165}
2166
2167static int snd_pcm_release(struct inode *inode, struct file *file)
2168{
877211f5
TI		 2169 struct snd_pcm *pcm;
2170 struct snd_pcm_substream *substream;
2171 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2172
2173 pcm_file = file->private_data;
2174 substream = pcm_file->substream;
7eaa943c
TI		 2175 if (snd_BUG_ON(!substream))
2176 return -ENXIO;
1da177e4 2177 pcm = substream->pcm;
1a60d4c5 2178 mutex_lock(&pcm->open_mutex);
3bf75f9b 2179 snd_pcm_release_substream(substream);
548a648b 2180 kfree(pcm_file);
1a60d4c5 2181 mutex_unlock(&pcm->open_mutex);
1da177e4
LT		 2182 wake_up(&pcm->open_wait);
2183 module_put(pcm->card->module);
2184 snd_card_file_remove(pcm->card, file);
2185 return 0;
2186}
2187
877211f5
TI		 2188static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2189 snd_pcm_uframes_t frames)
1da177e4 2190{
877211f5 2191 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2192 snd_pcm_sframes_t appl_ptr;
2193 snd_pcm_sframes_t ret;
2194 snd_pcm_sframes_t hw_avail;
2195
2196 if (frames == 0)
2197 return 0;
2198
2199 snd_pcm_stream_lock_irq(substream);
2200 switch (runtime->status->state) {
2201 case SNDRV_PCM_STATE_PREPARED:
2202 break;
2203 case SNDRV_PCM_STATE_DRAINING:
2204 case SNDRV_PCM_STATE_RUNNING:
2205 if (snd_pcm_update_hw_ptr(substream) >= 0)
2206 break;
2207 /* Fall through */
2208 case SNDRV_PCM_STATE_XRUN:
2209 ret = -EPIPE;
2210 goto __end;
51840409
LR		 2211 case SNDRV_PCM_STATE_SUSPENDED:
2212 ret = -ESTRPIPE;
2213 goto __end;
1da177e4
LT		 2214 default:
2215 ret = -EBADFD;
2216 goto __end;
2217 }
2218
2219 hw_avail = snd_pcm_playback_hw_avail(runtime);
2220 if (hw_avail <= 0) {
2221 ret = 0;
2222 goto __end;
2223 }
2224 if (frames > (snd_pcm_uframes_t)hw_avail)
2225 frames = hw_avail;
1da177e4
LT		 2226 appl_ptr = runtime->control->appl_ptr - frames;
2227 if (appl_ptr < 0)
2228 appl_ptr += runtime->boundary;
2229 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2230 ret = frames;
2231 __end:
2232 snd_pcm_stream_unlock_irq(substream);
2233 return ret;
2234}
2235
877211f5
TI		 2236static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2237 snd_pcm_uframes_t frames)
1da177e4 2238{
877211f5 2239 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2240 snd_pcm_sframes_t appl_ptr;
2241 snd_pcm_sframes_t ret;
2242 snd_pcm_sframes_t hw_avail;
2243
2244 if (frames == 0)
2245 return 0;
2246
2247 snd_pcm_stream_lock_irq(substream);
2248 switch (runtime->status->state) {
2249 case SNDRV_PCM_STATE_PREPARED:
2250 case SNDRV_PCM_STATE_DRAINING:
2251 break;
2252 case SNDRV_PCM_STATE_RUNNING:
2253 if (snd_pcm_update_hw_ptr(substream) >= 0)
2254 break;
2255 /* Fall through */
2256 case SNDRV_PCM_STATE_XRUN:
2257 ret = -EPIPE;
2258 goto __end;
51840409
LR		 2259 case SNDRV_PCM_STATE_SUSPENDED:
2260 ret = -ESTRPIPE;
2261 goto __end;
1da177e4
LT		 2262 default:
2263 ret = -EBADFD;
2264 goto __end;
2265 }
2266
2267 hw_avail = snd_pcm_capture_hw_avail(runtime);
2268 if (hw_avail <= 0) {
2269 ret = 0;
2270 goto __end;
2271 }
2272 if (frames > (snd_pcm_uframes_t)hw_avail)
2273 frames = hw_avail;
1da177e4
LT		 2274 appl_ptr = runtime->control->appl_ptr - frames;
2275 if (appl_ptr < 0)
2276 appl_ptr += runtime->boundary;
2277 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2278 ret = frames;
2279 __end:
2280 snd_pcm_stream_unlock_irq(substream);
2281 return ret;
2282}
2283
877211f5
TI		 2284static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2285 snd_pcm_uframes_t frames)
1da177e4 2286{
877211f5 2287 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2288 snd_pcm_sframes_t appl_ptr;
2289 snd_pcm_sframes_t ret;
2290 snd_pcm_sframes_t avail;
2291
2292 if (frames == 0)
2293 return 0;
2294
2295 snd_pcm_stream_lock_irq(substream);
2296 switch (runtime->status->state) {
2297 case SNDRV_PCM_STATE_PREPARED:
2298 case SNDRV_PCM_STATE_PAUSED:
2299 break;
2300 case SNDRV_PCM_STATE_DRAINING:
2301 case SNDRV_PCM_STATE_RUNNING:
2302 if (snd_pcm_update_hw_ptr(substream) >= 0)
2303 break;
2304 /* Fall through */
2305 case SNDRV_PCM_STATE_XRUN:
2306 ret = -EPIPE;
2307 goto __end;
51840409
LR		 2308 case SNDRV_PCM_STATE_SUSPENDED:
2309 ret = -ESTRPIPE;
2310 goto __end;
1da177e4
LT		 2311 default:
2312 ret = -EBADFD;
2313 goto __end;
2314 }
2315
2316 avail = snd_pcm_playback_avail(runtime);
2317 if (avail <= 0) {
2318 ret = 0;
2319 goto __end;
2320 }
2321 if (frames > (snd_pcm_uframes_t)avail)
2322 frames = avail;
1da177e4
LT		 2323 appl_ptr = runtime->control->appl_ptr + frames;
2324 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2325 appl_ptr -= runtime->boundary;
2326 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2327 ret = frames;
2328 __end:
2329 snd_pcm_stream_unlock_irq(substream);
2330 return ret;
2331}
2332
877211f5
TI		 2333static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2334 snd_pcm_uframes_t frames)
1da177e4 2335{
877211f5 2336 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2337 snd_pcm_sframes_t appl_ptr;
2338 snd_pcm_sframes_t ret;
2339 snd_pcm_sframes_t avail;
2340
2341 if (frames == 0)
2342 return 0;
2343
2344 snd_pcm_stream_lock_irq(substream);
2345 switch (runtime->status->state) {
2346 case SNDRV_PCM_STATE_PREPARED:
2347 case SNDRV_PCM_STATE_DRAINING:
2348 case SNDRV_PCM_STATE_PAUSED:
2349 break;
2350 case SNDRV_PCM_STATE_RUNNING:
2351 if (snd_pcm_update_hw_ptr(substream) >= 0)
2352 break;
2353 /* Fall through */
2354 case SNDRV_PCM_STATE_XRUN:
2355 ret = -EPIPE;
2356 goto __end;
51840409
LR		 2357 case SNDRV_PCM_STATE_SUSPENDED:
2358 ret = -ESTRPIPE;
2359 goto __end;
1da177e4
LT		 2360 default:
2361 ret = -EBADFD;
2362 goto __end;
2363 }
2364
2365 avail = snd_pcm_capture_avail(runtime);
2366 if (avail <= 0) {
2367 ret = 0;
2368 goto __end;
2369 }
2370 if (frames > (snd_pcm_uframes_t)avail)
2371 frames = avail;
1da177e4
LT		 2372 appl_ptr = runtime->control->appl_ptr + frames;
2373 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2374 appl_ptr -= runtime->boundary;
2375 runtime->control->appl_ptr = appl_ptr;
1da177e4
LT		 2376 ret = frames;
2377 __end:
2378 snd_pcm_stream_unlock_irq(substream);
2379 return ret;
2380}
2381
877211f5 2382static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
1da177e4 2383{
877211f5 2384 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2385 int err;
2386
2387 snd_pcm_stream_lock_irq(substream);
2388 switch (runtime->status->state) {
2389 case SNDRV_PCM_STATE_DRAINING:
2390 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2391 goto __badfd;
2392 case SNDRV_PCM_STATE_RUNNING:
2393 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2394 break;
2395 /* Fall through */
2396 case SNDRV_PCM_STATE_PREPARED:
2397 case SNDRV_PCM_STATE_SUSPENDED:
2398 err = 0;
2399 break;
2400 case SNDRV_PCM_STATE_XRUN:
2401 err = -EPIPE;
2402 break;
2403 default:
2404 __badfd:
2405 err = -EBADFD;
2406 break;
2407 }
2408 snd_pcm_stream_unlock_irq(substream);
2409 return err;
2410}
2411
877211f5
TI		 2412static int snd_pcm_delay(struct snd_pcm_substream *substream,
2413 snd_pcm_sframes_t __user *res)
1da177e4 2414{
877211f5 2415 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2416 int err;
2417 snd_pcm_sframes_t n = 0;
2418
2419 snd_pcm_stream_lock_irq(substream);
2420 switch (runtime->status->state) {
2421 case SNDRV_PCM_STATE_DRAINING:
2422 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2423 goto __badfd;
2424 case SNDRV_PCM_STATE_RUNNING:
2425 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2426 break;
2427 /* Fall through */
2428 case SNDRV_PCM_STATE_PREPARED:
2429 case SNDRV_PCM_STATE_SUSPENDED:
2430 err = 0;
2431 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2432 n = snd_pcm_playback_hw_avail(runtime);
2433 else
2434 n = snd_pcm_capture_avail(runtime);
4bbe1ddf 2435 n += runtime->delay;
1da177e4
LT		 2436 break;
2437 case SNDRV_PCM_STATE_XRUN:
2438 err = -EPIPE;
2439 break;
2440 default:
2441 __badfd:
2442 err = -EBADFD;
2443 break;
2444 }
2445 snd_pcm_stream_unlock_irq(substream);
2446 if (!err)
2447 if (put_user(n, res))
2448 err = -EFAULT;
2449 return err;
2450}
2451
877211f5
TI		 2452static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2453 struct snd_pcm_sync_ptr __user *_sync_ptr)
1da177e4 2454{
877211f5
TI		 2455 struct snd_pcm_runtime *runtime = substream->runtime;
2456 struct snd_pcm_sync_ptr sync_ptr;
2457 volatile struct snd_pcm_mmap_status *status;
2458 volatile struct snd_pcm_mmap_control *control;
1da177e4
LT		 2459 int err;
2460
2461 memset(&sync_ptr, 0, sizeof(sync_ptr));
2462 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2463 return -EFAULT;
877211f5 2464 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 2465 return -EFAULT;
2466 status = runtime->status;
2467 control = runtime->control;
2468 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2469 err = snd_pcm_hwsync(substream);
2470 if (err < 0)
2471 return err;
2472 }
2473 snd_pcm_stream_lock_irq(substream);
2474 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2475 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2476 else
2477 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2478 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2479 control->avail_min = sync_ptr.c.control.avail_min;
2480 else
2481 sync_ptr.c.control.avail_min = control->avail_min;
2482 sync_ptr.s.status.state = status->state;
2483 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2484 sync_ptr.s.status.tstamp = status->tstamp;
2485 sync_ptr.s.status.suspended_state = status->suspended_state;
2486 snd_pcm_stream_unlock_irq(substream);
2487 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2488 return -EFAULT;
2489 return 0;
2490}
b751eef1
JK		 2491
2492static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2493{
2494 struct snd_pcm_runtime *runtime = substream->runtime;
2495 int arg;
2496
2497 if (get_user(arg, _arg))
2498 return -EFAULT;
2499 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2500 return -EINVAL;
2501 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2502 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2503 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2504 return 0;
2505}
1da177e4 2506
0df63e44
TI		 2507static int snd_pcm_common_ioctl1(struct file *file,
2508 struct snd_pcm_substream *substream,
1da177e4
LT		 2509 unsigned int cmd, void __user *arg)
2510{
1da177e4
LT		 2511 switch (cmd) {
2512 case SNDRV_PCM_IOCTL_PVERSION:
2513 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2514 case SNDRV_PCM_IOCTL_INFO:
2515 return snd_pcm_info_user(substream, arg);
28e9e473
JK		 2516 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2517 return 0;
b751eef1
JK		 2518 case SNDRV_PCM_IOCTL_TTSTAMP:
2519 return snd_pcm_tstamp(substream, arg);
1da177e4
LT		 2520 case SNDRV_PCM_IOCTL_HW_REFINE:
2521 return snd_pcm_hw_refine_user(substream, arg);
2522 case SNDRV_PCM_IOCTL_HW_PARAMS:
2523 return snd_pcm_hw_params_user(substream, arg);
2524 case SNDRV_PCM_IOCTL_HW_FREE:
2525 return snd_pcm_hw_free(substream);
2526 case SNDRV_PCM_IOCTL_SW_PARAMS:
2527 return snd_pcm_sw_params_user(substream, arg);
2528 case SNDRV_PCM_IOCTL_STATUS:
2529 return snd_pcm_status_user(substream, arg);
2530 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2531 return snd_pcm_channel_info_user(substream, arg);
2532 case SNDRV_PCM_IOCTL_PREPARE:
0df63e44 2533 return snd_pcm_prepare(substream, file);
1da177e4
LT		 2534 case SNDRV_PCM_IOCTL_RESET:
2535 return snd_pcm_reset(substream);
2536 case SNDRV_PCM_IOCTL_START:
2537 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2538 case SNDRV_PCM_IOCTL_LINK:
2539 return snd_pcm_link(substream, (int)(unsigned long) arg);
2540 case SNDRV_PCM_IOCTL_UNLINK:
2541 return snd_pcm_unlink(substream);
2542 case SNDRV_PCM_IOCTL_RESUME:
2543 return snd_pcm_resume(substream);
2544 case SNDRV_PCM_IOCTL_XRUN:
2545 return snd_pcm_xrun(substream);
2546 case SNDRV_PCM_IOCTL_HWSYNC:
2547 return snd_pcm_hwsync(substream);
2548 case SNDRV_PCM_IOCTL_DELAY:
2549 return snd_pcm_delay(substream, arg);
2550 case SNDRV_PCM_IOCTL_SYNC_PTR:
2551 return snd_pcm_sync_ptr(substream, arg);
59d48582 2552#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 2553 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2554 return snd_pcm_hw_refine_old_user(substream, arg);
2555 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2556 return snd_pcm_hw_params_old_user(substream, arg);
59d48582 2557#endif
1da177e4 2558 case SNDRV_PCM_IOCTL_DRAIN:
4cdc115f 2559 return snd_pcm_drain(substream, file);
1da177e4
LT		 2560 case SNDRV_PCM_IOCTL_DROP:
2561 return snd_pcm_drop(substream);
e661d0dd
TI		 2562 case SNDRV_PCM_IOCTL_PAUSE:
2563 {
2564 int res;
2565 snd_pcm_stream_lock_irq(substream);
2566 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2567 snd_pcm_stream_unlock_irq(substream);
2568 return res;
2569 }
1da177e4
LT		 2570 }
2571 snd_printd("unknown ioctl = 0x%x\n", cmd);
2572 return -ENOTTY;
2573}
2574
0df63e44
TI		 2575static int snd_pcm_playback_ioctl1(struct file *file,
2576 struct snd_pcm_substream *substream,
1da177e4
LT		 2577 unsigned int cmd, void __user *arg)
2578{
7eaa943c
TI		 2579 if (snd_BUG_ON(!substream))
2580 return -ENXIO;
2581 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2582 return -EINVAL;
1da177e4
LT		 2583 switch (cmd) {
2584 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2585 {
877211f5
TI		 2586 struct snd_xferi xferi;
2587 struct snd_xferi __user *_xferi = arg;
2588 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2589 snd_pcm_sframes_t result;
2590 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2591 return -EBADFD;
2592 if (put_user(0, &_xferi->result))
2593 return -EFAULT;
2594 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2595 return -EFAULT;
2596 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2597 __put_user(result, &_xferi->result);
2598 return result < 0 ? result : 0;
2599 }
2600 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2601 {
877211f5
TI		 2602 struct snd_xfern xfern;
2603 struct snd_xfern __user *_xfern = arg;
2604 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2605 void __user **bufs;
2606 snd_pcm_sframes_t result;
2607 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2608 return -EBADFD;
2609 if (runtime->channels > 128)
2610 return -EINVAL;
2611 if (put_user(0, &_xfern->result))
2612 return -EFAULT;
2613 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2614 return -EFAULT;
ef44a1ec
LZ		 2615
2616 bufs = memdup_user(xfern.bufs,
2617 sizeof(void *) * runtime->channels);
2618 if (IS_ERR(bufs))
2619 return PTR_ERR(bufs);
1da177e4
LT		 2620 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2621 kfree(bufs);
2622 __put_user(result, &_xfern->result);
2623 return result < 0 ? result : 0;
2624 }
2625 case SNDRV_PCM_IOCTL_REWIND:
2626 {
2627 snd_pcm_uframes_t frames;
2628 snd_pcm_uframes_t __user *_frames = arg;
2629 snd_pcm_sframes_t result;
2630 if (get_user(frames, _frames))
2631 return -EFAULT;
2632 if (put_user(0, _frames))
2633 return -EFAULT;
2634 result = snd_pcm_playback_rewind(substream, frames);
2635 __put_user(result, _frames);
2636 return result < 0 ? result : 0;
2637 }
2638 case SNDRV_PCM_IOCTL_FORWARD:
2639 {
2640 snd_pcm_uframes_t frames;
2641 snd_pcm_uframes_t __user *_frames = arg;
2642 snd_pcm_sframes_t result;
2643 if (get_user(frames, _frames))
2644 return -EFAULT;
2645 if (put_user(0, _frames))
2646 return -EFAULT;
2647 result = snd_pcm_playback_forward(substream, frames);
2648 __put_user(result, _frames);
2649 return result < 0 ? result : 0;
2650 }
1da177e4 2651 }
0df63e44 2652 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2653}
2654
0df63e44
TI		 2655static int snd_pcm_capture_ioctl1(struct file *file,
2656 struct snd_pcm_substream *substream,
1da177e4
LT		 2657 unsigned int cmd, void __user *arg)
2658{
7eaa943c
TI		 2659 if (snd_BUG_ON(!substream))
2660 return -ENXIO;
2661 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2662 return -EINVAL;
1da177e4
LT		 2663 switch (cmd) {
2664 case SNDRV_PCM_IOCTL_READI_FRAMES:
2665 {
877211f5
TI		 2666 struct snd_xferi xferi;
2667 struct snd_xferi __user *_xferi = arg;
2668 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2669 snd_pcm_sframes_t result;
2670 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2671 return -EBADFD;
2672 if (put_user(0, &_xferi->result))
2673 return -EFAULT;
2674 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2675 return -EFAULT;
2676 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2677 __put_user(result, &_xferi->result);
2678 return result < 0 ? result : 0;
2679 }
2680 case SNDRV_PCM_IOCTL_READN_FRAMES:
2681 {
877211f5
TI		 2682 struct snd_xfern xfern;
2683 struct snd_xfern __user *_xfern = arg;
2684 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 2685 void *bufs;
2686 snd_pcm_sframes_t result;
2687 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2688 return -EBADFD;
2689 if (runtime->channels > 128)
2690 return -EINVAL;
2691 if (put_user(0, &_xfern->result))
2692 return -EFAULT;
2693 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2694 return -EFAULT;
ef44a1ec
LZ		 2695
2696 bufs = memdup_user(xfern.bufs,
2697 sizeof(void *) * runtime->channels);
2698 if (IS_ERR(bufs))
2699 return PTR_ERR(bufs);
1da177e4
LT		 2700 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2701 kfree(bufs);
2702 __put_user(result, &_xfern->result);
2703 return result < 0 ? result : 0;
2704 }
2705 case SNDRV_PCM_IOCTL_REWIND:
2706 {
2707 snd_pcm_uframes_t frames;
2708 snd_pcm_uframes_t __user *_frames = arg;
2709 snd_pcm_sframes_t result;
2710 if (get_user(frames, _frames))
2711 return -EFAULT;
2712 if (put_user(0, _frames))
2713 return -EFAULT;
2714 result = snd_pcm_capture_rewind(substream, frames);
2715 __put_user(result, _frames);
2716 return result < 0 ? result : 0;
2717 }
2718 case SNDRV_PCM_IOCTL_FORWARD:
2719 {
2720 snd_pcm_uframes_t frames;
2721 snd_pcm_uframes_t __user *_frames = arg;
2722 snd_pcm_sframes_t result;
2723 if (get_user(frames, _frames))
2724 return -EFAULT;
2725 if (put_user(0, _frames))
2726 return -EFAULT;
2727 result = snd_pcm_capture_forward(substream, frames);
2728 __put_user(result, _frames);
2729 return result < 0 ? result : 0;
2730 }
2731 }
0df63e44 2732 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
1da177e4
LT		 2733}
2734
877211f5
TI		 2735static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2736 unsigned long arg)
1da177e4 2737{
877211f5 2738 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2739
2740 pcm_file = file->private_data;
2741
2742 if (((cmd >> 8) & 0xff) != 'A')
2743 return -ENOTTY;
2744
0df63e44
TI		 2745 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2746 (void __user *)arg);
1da177e4
LT		 2747}
2748
877211f5
TI		 2749static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2750 unsigned long arg)
1da177e4 2751{
877211f5 2752 struct snd_pcm_file *pcm_file;
1da177e4
LT		 2753
2754 pcm_file = file->private_data;
2755
2756 if (((cmd >> 8) & 0xff) != 'A')
2757 return -ENOTTY;
2758
0df63e44
TI		 2759 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2760 (void __user *)arg);
1da177e4
LT		 2761}
2762
bf1bbb5a
TI		 2763int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2764 unsigned int cmd, void *arg)
1da177e4
LT		 2765{
2766 mm_segment_t fs;
2767 int result;
2768
2769 fs = snd_enter_user();
1da177e4
LT		 2770 switch (substream->stream) {
2771 case SNDRV_PCM_STREAM_PLAYBACK:
0df63e44
TI		 2772 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2773 (void __user *)arg);
bf1bbb5a 2774 break;
1da177e4 2775 case SNDRV_PCM_STREAM_CAPTURE:
0df63e44
TI		 2776 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2777 (void __user *)arg);
bf1bbb5a 2778 break;
1da177e4 2779 default:
bf1bbb5a
TI		 2780 result = -EINVAL;
2781 break;
1da177e4 2782 }
bf1bbb5a
TI		 2783 snd_leave_user(fs);
2784 return result;
1da177e4
LT		 2785}
2786
e88e8ae6
TI		 2787EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2788
877211f5
TI		 2789static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2790 loff_t * offset)
1da177e4 2791{
877211f5
TI		 2792 struct snd_pcm_file *pcm_file;
2793 struct snd_pcm_substream *substream;
2794 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2795 snd_pcm_sframes_t result;
2796
2797 pcm_file = file->private_data;
2798 substream = pcm_file->substream;
7eaa943c
TI		 2799 if (PCM_RUNTIME_CHECK(substream))
2800 return -ENXIO;
1da177e4
LT		 2801 runtime = substream->runtime;
2802 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2803 return -EBADFD;
2804 if (!frame_aligned(runtime, count))
2805 return -EINVAL;
2806 count = bytes_to_frames(runtime, count);
2807 result = snd_pcm_lib_read(substream, buf, count);
2808 if (result > 0)
2809 result = frames_to_bytes(runtime, result);
2810 return result;
2811}
2812
877211f5
TI		 2813static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2814 size_t count, loff_t * offset)
1da177e4 2815{
877211f5
TI		 2816 struct snd_pcm_file *pcm_file;
2817 struct snd_pcm_substream *substream;
2818 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2819 snd_pcm_sframes_t result;
2820
2821 pcm_file = file->private_data;
2822 substream = pcm_file->substream;
7eaa943c
TI		 2823 if (PCM_RUNTIME_CHECK(substream))
2824 return -ENXIO;
1da177e4 2825 runtime = substream->runtime;
7eaa943c
TI		 2826 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2827 return -EBADFD;
2828 if (!frame_aligned(runtime, count))
2829 return -EINVAL;
1da177e4
LT		 2830 count = bytes_to_frames(runtime, count);
2831 result = snd_pcm_lib_write(substream, buf, count);
2832 if (result > 0)
2833 result = frames_to_bytes(runtime, result);
1da177e4
LT		 2834 return result;
2835}
2836
ee0b3e67
BP		 2837static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2838 unsigned long nr_segs, loff_t pos)
1da177e4
LT		 2839
2840{
877211f5
TI		 2841 struct snd_pcm_file *pcm_file;
2842 struct snd_pcm_substream *substream;
2843 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2844 snd_pcm_sframes_t result;
2845 unsigned long i;
2846 void __user **bufs;
2847 snd_pcm_uframes_t frames;
2848
ee0b3e67 2849 pcm_file = iocb->ki_filp->private_data;
1da177e4 2850 substream = pcm_file->substream;
7eaa943c
TI		 2851 if (PCM_RUNTIME_CHECK(substream))
2852 return -ENXIO;
1da177e4
LT		 2853 runtime = substream->runtime;
2854 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2855 return -EBADFD;
ee0b3e67 2856 if (nr_segs > 1024 || nr_segs != runtime->channels)
1da177e4 2857 return -EINVAL;
ee0b3e67 2858 if (!frame_aligned(runtime, iov->iov_len))
1da177e4 2859 return -EINVAL;
ee0b3e67
BP		 2860 frames = bytes_to_samples(runtime, iov->iov_len);
2861 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2862 if (bufs == NULL)
2863 return -ENOMEM;
ee0b3e67
BP		 2864 for (i = 0; i < nr_segs; ++i)
2865 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2866 result = snd_pcm_lib_readv(substream, bufs, frames);
2867 if (result > 0)
2868 result = frames_to_bytes(runtime, result);
2869 kfree(bufs);
2870 return result;
2871}
2872
ee0b3e67
BP		 2873static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2874 unsigned long nr_segs, loff_t pos)
1da177e4 2875{
877211f5
TI		 2876 struct snd_pcm_file *pcm_file;
2877 struct snd_pcm_substream *substream;
2878 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2879 snd_pcm_sframes_t result;
2880 unsigned long i;
2881 void __user **bufs;
2882 snd_pcm_uframes_t frames;
2883
ee0b3e67 2884 pcm_file = iocb->ki_filp->private_data;
1da177e4 2885 substream = pcm_file->substream;
7eaa943c
TI		 2886 if (PCM_RUNTIME_CHECK(substream))
2887 return -ENXIO;
1da177e4 2888 runtime = substream->runtime;
7eaa943c
TI		 2889 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2890 return -EBADFD;
ee0b3e67 2891 if (nr_segs > 128 || nr_segs != runtime->channels ||
7eaa943c
TI		 2892 !frame_aligned(runtime, iov->iov_len))
2893 return -EINVAL;
ee0b3e67
BP		 2894 frames = bytes_to_samples(runtime, iov->iov_len);
2895 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
1da177e4
LT		 2896 if (bufs == NULL)
2897 return -ENOMEM;
ee0b3e67
BP		 2898 for (i = 0; i < nr_segs; ++i)
2899 bufs[i] = iov[i].iov_base;
1da177e4
LT		 2900 result = snd_pcm_lib_writev(substream, bufs, frames);
2901 if (result > 0)
2902 result = frames_to_bytes(runtime, result);
2903 kfree(bufs);
1da177e4
LT		 2904 return result;
2905}
2906
2907static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2908{
877211f5
TI		 2909 struct snd_pcm_file *pcm_file;
2910 struct snd_pcm_substream *substream;
2911 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2912 unsigned int mask;
2913 snd_pcm_uframes_t avail;
2914
2915 pcm_file = file->private_data;
2916
2917 substream = pcm_file->substream;
7eaa943c
TI		 2918 if (PCM_RUNTIME_CHECK(substream))
2919 return -ENXIO;
1da177e4
LT		 2920 runtime = substream->runtime;
2921
2922 poll_wait(file, &runtime->sleep, wait);
2923
2924 snd_pcm_stream_lock_irq(substream);
2925 avail = snd_pcm_playback_avail(runtime);
2926 switch (runtime->status->state) {
2927 case SNDRV_PCM_STATE_RUNNING:
2928 case SNDRV_PCM_STATE_PREPARED:
2929 case SNDRV_PCM_STATE_PAUSED:
2930 if (avail >= runtime->control->avail_min) {
2931 mask = POLLOUT | POLLWRNORM;
2932 break;
2933 }
2934 /* Fall through */
2935 case SNDRV_PCM_STATE_DRAINING:
2936 mask = 0;
2937 break;
2938 default:
2939 mask = POLLOUT | POLLWRNORM | POLLERR;
2940 break;
2941 }
2942 snd_pcm_stream_unlock_irq(substream);
2943 return mask;
2944}
2945
2946static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2947{
877211f5
TI		 2948 struct snd_pcm_file *pcm_file;
2949 struct snd_pcm_substream *substream;
2950 struct snd_pcm_runtime *runtime;
1da177e4
LT		 2951 unsigned int mask;
2952 snd_pcm_uframes_t avail;
2953
2954 pcm_file = file->private_data;
2955
2956 substream = pcm_file->substream;
7eaa943c
TI		 2957 if (PCM_RUNTIME_CHECK(substream))
2958 return -ENXIO;
1da177e4
LT		 2959 runtime = substream->runtime;
2960
2961 poll_wait(file, &runtime->sleep, wait);
2962
2963 snd_pcm_stream_lock_irq(substream);
2964 avail = snd_pcm_capture_avail(runtime);
2965 switch (runtime->status->state) {
2966 case SNDRV_PCM_STATE_RUNNING:
2967 case SNDRV_PCM_STATE_PREPARED:
2968 case SNDRV_PCM_STATE_PAUSED:
2969 if (avail >= runtime->control->avail_min) {
2970 mask = POLLIN | POLLRDNORM;
2971 break;
2972 }
2973 mask = 0;
2974 break;
2975 case SNDRV_PCM_STATE_DRAINING:
2976 if (avail > 0) {
2977 mask = POLLIN | POLLRDNORM;
2978 break;
2979 }
2980 /* Fall through */
2981 default:
2982 mask = POLLIN | POLLRDNORM | POLLERR;
2983 break;
2984 }
2985 snd_pcm_stream_unlock_irq(substream);
2986 return mask;
2987}
2988
2989/*
2990 * mmap support
2991 */
2992
2993/*
2994 * Only on coherent architectures, we can mmap the status and the control records
2995 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2996 */
2997#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2998/*
2999 * mmap status record
3000 */
3ad5afcd
NP		 3001static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3002 struct vm_fault *vmf)
1da177e4 3003{
877211f5
TI		 3004 struct snd_pcm_substream *substream = area->vm_private_data;
3005 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3006
3007 if (substream == NULL)
3ad5afcd 3008 return VM_FAULT_SIGBUS;
1da177e4 3009 runtime = substream->runtime;
3ad5afcd
NP		 3010 vmf->page = virt_to_page(runtime->status);
3011 get_page(vmf->page);
3012 return 0;
1da177e4
LT		 3013}
3014
f0f37e2f 3015static const struct vm_operations_struct snd_pcm_vm_ops_status =
1da177e4 3016{
3ad5afcd 3017 .fault = snd_pcm_mmap_status_fault,
1da177e4
LT		 3018};
3019
877211f5 3020static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3021 struct vm_area_struct *area)
3022{
1da177e4
LT		 3023 long size;
3024 if (!(area->vm_flags & VM_READ))
3025 return -EINVAL;
1da177e4 3026 size = area->vm_end - area->vm_start;
877211f5 3027 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
1da177e4
LT		 3028 return -EINVAL;
3029 area->vm_ops = &snd_pcm_vm_ops_status;
3030 area->vm_private_data = substream;
3031 area->vm_flags |= VM_RESERVED;
3032 return 0;
3033}
3034
3035/*
3036 * mmap control record
3037 */
3ad5afcd
NP		 3038static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3039 struct vm_fault *vmf)
1da177e4 3040{
877211f5
TI		 3041 struct snd_pcm_substream *substream = area->vm_private_data;
3042 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3043
3044 if (substream == NULL)
3ad5afcd 3045 return VM_FAULT_SIGBUS;
1da177e4 3046 runtime = substream->runtime;
3ad5afcd
NP		 3047 vmf->page = virt_to_page(runtime->control);
3048 get_page(vmf->page);
3049 return 0;
1da177e4
LT		 3050}
3051
f0f37e2f 3052static const struct vm_operations_struct snd_pcm_vm_ops_control =
1da177e4 3053{
3ad5afcd 3054 .fault = snd_pcm_mmap_control_fault,
1da177e4
LT		 3055};
3056
877211f5 3057static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3058 struct vm_area_struct *area)
3059{
1da177e4
LT		 3060 long size;
3061 if (!(area->vm_flags & VM_READ))
3062 return -EINVAL;
1da177e4 3063 size = area->vm_end - area->vm_start;
877211f5 3064 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
1da177e4
LT		 3065 return -EINVAL;
3066 area->vm_ops = &snd_pcm_vm_ops_control;
3067 area->vm_private_data = substream;
3068 area->vm_flags |= VM_RESERVED;
3069 return 0;
3070}
3071#else /* ! coherent mmap */
3072/*
3073 * don't support mmap for status and control records.
3074 */
877211f5 3075static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3076 struct vm_area_struct *area)
3077{
3078 return -ENXIO;
3079}
877211f5 3080static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3081 struct vm_area_struct *area)
3082{
3083 return -ENXIO;
3084}
3085#endif /* coherent mmap */
3086
9eb4a067
TI		 3087static inline struct page *
3088snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3089{
3090 void *vaddr = substream->runtime->dma_area + ofs;
66b6cfac
TI		 3091#if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3092 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3093 return virt_to_page(CAC_ADDR(vaddr));
6985c887
TI		 3094#endif
3095#if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3096 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3097 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3098 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3099 /* assume dma_handle set via pfn_to_phys() in
3100 * mm/dma-noncoherent.c
3101 */
3102 return pfn_to_page(addr >> PAGE_SHIFT);
3103 }
66b6cfac 3104#endif
9eb4a067
TI		 3105 return virt_to_page(vaddr);
3106}
3107
1da177e4 3108/*
3ad5afcd 3109 * fault callback for mmapping a RAM page
1da177e4 3110 */
3ad5afcd
NP		 3111static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3112 struct vm_fault *vmf)
1da177e4 3113{
877211f5
TI		 3114 struct snd_pcm_substream *substream = area->vm_private_data;
3115 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3116 unsigned long offset;
3117 struct page * page;
1da177e4
LT		 3118 size_t dma_bytes;
3119
3120 if (substream == NULL)
3ad5afcd 3121 return VM_FAULT_SIGBUS;
1da177e4 3122 runtime = substream->runtime;
3ad5afcd 3123 offset = vmf->pgoff << PAGE_SHIFT;
1da177e4
LT		 3124 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3125 if (offset > dma_bytes - PAGE_SIZE)
3ad5afcd 3126 return VM_FAULT_SIGBUS;
9eb4a067 3127 if (substream->ops->page)
1da177e4 3128 page = substream->ops->page(substream, offset);
9eb4a067
TI		 3129 else
3130 page = snd_pcm_default_page_ops(substream, offset);
3131 if (!page)
3132 return VM_FAULT_SIGBUS;
b5810039 3133 get_page(page);
3ad5afcd
NP		 3134 vmf->page = page;
3135 return 0;
1da177e4
LT		 3136}
3137
657b1989
TI		 3138static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3139 .open = snd_pcm_mmap_data_open,
3140 .close = snd_pcm_mmap_data_close,
3141};
3142
3143static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
1da177e4
LT		 3144 .open = snd_pcm_mmap_data_open,
3145 .close = snd_pcm_mmap_data_close,
3ad5afcd 3146 .fault = snd_pcm_mmap_data_fault,
1da177e4
LT		 3147};
3148
657b1989
TI		 3149#ifndef ARCH_HAS_DMA_MMAP_COHERENT
3150/* This should be defined / handled globally! */
3151#ifdef CONFIG_ARM
3152#define ARCH_HAS_DMA_MMAP_COHERENT
3153#endif
3154#endif
3155
1da177e4
LT		 3156/*
3157 * mmap the DMA buffer on RAM
3158 */
18a2b962
TI		 3159int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3160 struct vm_area_struct *area)
1da177e4 3161{
1da177e4 3162 area->vm_flags |= VM_RESERVED;
657b1989
TI		 3163#ifdef ARCH_HAS_DMA_MMAP_COHERENT
3164 if (!substream->ops->page &&
3165 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3166 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3167 area,
3168 substream->runtime->dma_area,
3169 substream->runtime->dma_addr,
3170 area->vm_end - area->vm_start);
9fe17b5d
TI		 3171#elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3172 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3173 !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3174 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
657b1989
TI		 3175#endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3176 /* mmap with fault handler */
3177 area->vm_ops = &snd_pcm_vm_ops_data_fault;
1da177e4
LT		 3178 return 0;
3179}
18a2b962 3180EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
1da177e4
LT		 3181
3182/*
3183 * mmap the DMA buffer on I/O memory area
3184 */
3185#if SNDRV_PCM_INFO_MMAP_IOMEM
877211f5
TI		 3186int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3187 struct vm_area_struct *area)
1da177e4
LT		 3188{
3189 long size;
3190 unsigned long offset;
3191
1da177e4 3192 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
1da177e4
LT		 3193 area->vm_flags |= VM_IO;
3194 size = area->vm_end - area->vm_start;
3195 offset = area->vm_pgoff << PAGE_SHIFT;
3196 if (io_remap_pfn_range(area, area->vm_start,
3197 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3198 size, area->vm_page_prot))
3199 return -EAGAIN;
1da177e4
LT		 3200 return 0;
3201}
e88e8ae6
TI		 3202
3203EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
1da177e4
LT		 3204#endif /* SNDRV_PCM_INFO_MMAP */
3205
3206/*
3207 * mmap DMA buffer
3208 */
877211f5 3209int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
1da177e4
LT		 3210 struct vm_area_struct *area)
3211{
877211f5 3212 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3213 long size;
3214 unsigned long offset;
3215 size_t dma_bytes;
657b1989 3216 int err;
1da177e4
LT		 3217
3218 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3219 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3220 return -EINVAL;
3221 } else {
3222 if (!(area->vm_flags & VM_READ))
3223 return -EINVAL;
3224 }
3225 runtime = substream->runtime;
1da177e4
LT		 3226 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3227 return -EBADFD;
3228 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3229 return -ENXIO;
3230 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3231 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3232 return -EINVAL;
3233 size = area->vm_end - area->vm_start;
3234 offset = area->vm_pgoff << PAGE_SHIFT;
3235 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3236 if ((size_t)size > dma_bytes)
3237 return -EINVAL;
3238 if (offset > dma_bytes - size)
3239 return -EINVAL;
3240
657b1989
TI		 3241 area->vm_ops = &snd_pcm_vm_ops_data;
3242 area->vm_private_data = substream;
1da177e4 3243 if (substream->ops->mmap)
657b1989 3244 err = substream->ops->mmap(substream, area);
1da177e4 3245 else
18a2b962 3246 err = snd_pcm_lib_default_mmap(substream, area);
657b1989
TI		 3247 if (!err)
3248 atomic_inc(&substream->mmap_count);
3249 return err;
1da177e4
LT		 3250}
3251
e88e8ae6
TI		 3252EXPORT_SYMBOL(snd_pcm_mmap_data);
3253
1da177e4
LT		 3254static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3255{
877211f5
TI		 3256 struct snd_pcm_file * pcm_file;
3257 struct snd_pcm_substream *substream;
1da177e4
LT		 3258 unsigned long offset;
3259
3260 pcm_file = file->private_data;
3261 substream = pcm_file->substream;
7eaa943c
TI		 3262 if (PCM_RUNTIME_CHECK(substream))
3263 return -ENXIO;
1da177e4
LT		 3264
3265 offset = area->vm_pgoff << PAGE_SHIFT;
3266 switch (offset) {
3267 case SNDRV_PCM_MMAP_OFFSET_STATUS:
548a648b 3268 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3269 return -ENXIO;
3270 return snd_pcm_mmap_status(substream, file, area);
3271 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
548a648b 3272 if (pcm_file->no_compat_mmap)
1da177e4
LT		 3273 return -ENXIO;
3274 return snd_pcm_mmap_control(substream, file, area);
3275 default:
3276 return snd_pcm_mmap_data(substream, file, area);
3277 }
3278 return 0;
3279}
3280
3281static int snd_pcm_fasync(int fd, struct file * file, int on)
3282{
877211f5
TI		 3283 struct snd_pcm_file * pcm_file;
3284 struct snd_pcm_substream *substream;
3285 struct snd_pcm_runtime *runtime;
1da177e4
LT		 3286
3287 pcm_file = file->private_data;
3288 substream = pcm_file->substream;
7eaa943c 3289 if (PCM_RUNTIME_CHECK(substream))
d05468b7 3290 return -ENXIO;
1da177e4 3291 runtime = substream->runtime;
d05468b7 3292 return fasync_helper(fd, file, on, &runtime->fasync);
1da177e4
LT		 3293}
3294
3295/*
3296 * ioctl32 compat
3297 */
3298#ifdef CONFIG_COMPAT
3299#include "pcm_compat.c"
3300#else
3301#define snd_pcm_ioctl_compat NULL
3302#endif
3303
3304/*
3305 * To be removed helpers to keep binary compatibility
3306 */
3307
59d48582 3308#ifdef CONFIG_SND_SUPPORT_OLD_API
1da177e4
LT		 3309#define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3310#define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3311
877211f5
TI		 3312static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3313 struct snd_pcm_hw_params_old *oparams)
1da177e4
LT		 3314{
3315 unsigned int i;
3316
3317 memset(params, 0, sizeof(*params));
3318 params->flags = oparams->flags;
3319 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3320 params->masks[i].bits[0] = oparams->masks[i];
3321 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3322 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3323 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3324 params->info = oparams->info;
3325 params->msbits = oparams->msbits;
3326 params->rate_num = oparams->rate_num;
3327 params->rate_den = oparams->rate_den;
3328 params->fifo_size = oparams->fifo_size;
3329}
3330
877211f5
TI		 3331static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3332 struct snd_pcm_hw_params *params)
1da177e4
LT		 3333{
3334 unsigned int i;
3335
3336 memset(oparams, 0, sizeof(*oparams));
3337 oparams->flags = params->flags;
3338 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3339 oparams->masks[i] = params->masks[i].bits[0];
3340 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3341 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3342 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3343 oparams->info = params->info;
3344 oparams->msbits = params->msbits;
3345 oparams->rate_num = params->rate_num;
3346 oparams->rate_den = params->rate_den;
3347 oparams->fifo_size = params->fifo_size;
3348}
3349
877211f5
TI		 3350static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3351 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3352{
877211f5
TI		 3353 struct snd_pcm_hw_params *params;
3354 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3355 int err;
3356
3357 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3358 if (!params)
3359 return -ENOMEM;
1da177e4 3360
ef44a1ec
LZ		 3361 oparams = memdup_user(_oparams, sizeof(*oparams));
3362 if (IS_ERR(oparams)) {
3363 err = PTR_ERR(oparams);
1da177e4
LT		 3364 goto out;
3365 }
3366 snd_pcm_hw_convert_from_old_params(params, oparams);
3367 err = snd_pcm_hw_refine(substream, params);
3368 snd_pcm_hw_convert_to_old_params(oparams, params);
3369 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3370 if (!err)
3371 err = -EFAULT;
3372 }
ef44a1ec
LZ		 3373
3374 kfree(oparams);
1da177e4
LT		 3375out:
3376 kfree(params);
1da177e4
LT		 3377 return err;
3378}
3379
877211f5
TI		 3380static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3381 struct snd_pcm_hw_params_old __user * _oparams)
1da177e4 3382{
877211f5
TI		 3383 struct snd_pcm_hw_params *params;
3384 struct snd_pcm_hw_params_old *oparams = NULL;
1da177e4
LT		 3385 int err;
3386
3387 params = kmalloc(sizeof(*params), GFP_KERNEL);
ef44a1ec
LZ		 3388 if (!params)
3389 return -ENOMEM;
3390
3391 oparams = memdup_user(_oparams, sizeof(*oparams));
3392 if (IS_ERR(oparams)) {
3393 err = PTR_ERR(oparams);
1da177e4
LT		 3394 goto out;
3395 }
3396 snd_pcm_hw_convert_from_old_params(params, oparams);
3397 err = snd_pcm_hw_params(substream, params);
3398 snd_pcm_hw_convert_to_old_params(oparams, params);
3399 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3400 if (!err)
3401 err = -EFAULT;
3402 }
ef44a1ec
LZ		 3403
3404 kfree(oparams);
1da177e4
LT		 3405out:
3406 kfree(params);
1da177e4
LT		 3407 return err;
3408}
59d48582 3409#endif /* CONFIG_SND_SUPPORT_OLD_API */
1da177e4 3410
7003609b 3411#ifndef CONFIG_MMU
55c63bd2
DG		 3412static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3413 unsigned long addr,
3414 unsigned long len,
3415 unsigned long pgoff,
3416 unsigned long flags)
3417{
3418 struct snd_pcm_file *pcm_file = file->private_data;
3419 struct snd_pcm_substream *substream = pcm_file->substream;
3420 struct snd_pcm_runtime *runtime = substream->runtime;
3421 unsigned long offset = pgoff << PAGE_SHIFT;
3422
3423 switch (offset) {
3424 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3425 return (unsigned long)runtime->status;
3426 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3427 return (unsigned long)runtime->control;
3428 default:
3429 return (unsigned long)runtime->dma_area + offset;
3430 }
7003609b
CC		 3431}
3432#else
55c63bd2 3433# define snd_pcm_get_unmapped_area NULL
7003609b
CC		 3434#endif
3435
1da177e4
LT		 3436/*
3437 * Register section
3438 */
3439
9c2e08c5 3440const struct file_operations snd_pcm_f_ops[2] = {
1da177e4 3441 {
2af677fc
CL		 3442 .owner = THIS_MODULE,
3443 .write = snd_pcm_write,
ee0b3e67 3444 .aio_write = snd_pcm_aio_write,
f87135f5 3445 .open = snd_pcm_playback_open,
2af677fc 3446 .release = snd_pcm_release,
02f4865f 3447 .llseek = no_llseek,
2af677fc
CL		 3448 .poll = snd_pcm_playback_poll,
3449 .unlocked_ioctl = snd_pcm_playback_ioctl,
3450 .compat_ioctl = snd_pcm_ioctl_compat,
3451 .mmap = snd_pcm_mmap,
3452 .fasync = snd_pcm_fasync,
55c63bd2 3453 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3454 },
3455 {
2af677fc
CL		 3456 .owner = THIS_MODULE,
3457 .read = snd_pcm_read,
ee0b3e67 3458 .aio_read = snd_pcm_aio_read,
f87135f5 3459 .open = snd_pcm_capture_open,
2af677fc 3460 .release = snd_pcm_release,
02f4865f 3461 .llseek = no_llseek,
2af677fc
CL		 3462 .poll = snd_pcm_capture_poll,
3463 .unlocked_ioctl = snd_pcm_capture_ioctl,
3464 .compat_ioctl = snd_pcm_ioctl_compat,
3465 .mmap = snd_pcm_mmap,
3466 .fasync = snd_pcm_fasync,
55c63bd2 3467 .get_unmapped_area = snd_pcm_get_unmapped_area,
1da177e4
LT		 3468 }
3469};
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