8e777f71717cc0ddb39dd276f400de67e1d5e5b5
[linux-2.6.git] / sound / core / pcm_native.c
1 /*
2  *  Digital Audio (PCM) abstract layer
3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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
22 #include <linux/mm.h>
23 #include <linux/file.h>
24 #include <linux/slab.h>
25 #include <linux/smp_lock.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos_params.h>
28 #include <linux/uio.h>
29 #include <linux/dma-mapping.h>
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>
38
39 /*
40  *  Compatibility
41  */
42
43 struct snd_pcm_hw_params_old {
44         unsigned int flags;
45         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
46                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
47         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
48                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
49         unsigned int rmask;
50         unsigned int cmask;
51         unsigned int info;
52         unsigned int msbits;
53         unsigned int rate_num;
54         unsigned int rate_den;
55         snd_pcm_uframes_t fifo_size;
56         unsigned char reserved[64];
57 };
58
59 #ifdef CONFIG_SND_SUPPORT_OLD_API
60 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
61 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
62
63 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
64                                       struct snd_pcm_hw_params_old __user * _oparams);
65 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
66                                       struct snd_pcm_hw_params_old __user * _oparams);
67 #endif
68 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
69
70 /*
71  *
72  */
73
74 DEFINE_RWLOCK(snd_pcm_link_rwlock);
75 EXPORT_SYMBOL(snd_pcm_link_rwlock);
76
77 static DECLARE_RWSEM(snd_pcm_link_rwsem);
78
79 static inline mm_segment_t snd_enter_user(void)
80 {
81         mm_segment_t fs = get_fs();
82         set_fs(get_ds());
83         return fs;
84 }
85
86 static inline void snd_leave_user(mm_segment_t fs)
87 {
88         set_fs(fs);
89 }
90
91
92
93 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
94 {
95         struct snd_pcm_runtime *runtime;
96         struct snd_pcm *pcm = substream->pcm;
97         struct snd_pcm_str *pstr = substream->pstr;
98
99         memset(info, 0, sizeof(*info));
100         info->card = pcm->card->number;
101         info->device = pcm->device;
102         info->stream = substream->stream;
103         info->subdevice = substream->number;
104         strlcpy(info->id, pcm->id, sizeof(info->id));
105         strlcpy(info->name, pcm->name, sizeof(info->name));
106         info->dev_class = pcm->dev_class;
107         info->dev_subclass = pcm->dev_subclass;
108         info->subdevices_count = pstr->substream_count;
109         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
110         strlcpy(info->subname, substream->name, sizeof(info->subname));
111         runtime = substream->runtime;
112         /* AB: FIXME!!! This is definitely nonsense */
113         if (runtime) {
114                 info->sync = runtime->sync;
115                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
116         }
117         return 0;
118 }
119
120 int snd_pcm_info_user(struct snd_pcm_substream *substream,
121                       struct snd_pcm_info __user * _info)
122 {
123         struct snd_pcm_info *info;
124         int err;
125
126         info = kmalloc(sizeof(*info), GFP_KERNEL);
127         if (! info)
128                 return -ENOMEM;
129         err = snd_pcm_info(substream, info);
130         if (err >= 0) {
131                 if (copy_to_user(_info, info, sizeof(*info)))
132                         err = -EFAULT;
133         }
134         kfree(info);
135         return err;
136 }
137
138 #undef RULES_DEBUG
139
140 #ifdef RULES_DEBUG
141 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
142 char *snd_pcm_hw_param_names[] = {
143         HW_PARAM(ACCESS),
144         HW_PARAM(FORMAT),
145         HW_PARAM(SUBFORMAT),
146         HW_PARAM(SAMPLE_BITS),
147         HW_PARAM(FRAME_BITS),
148         HW_PARAM(CHANNELS),
149         HW_PARAM(RATE),
150         HW_PARAM(PERIOD_TIME),
151         HW_PARAM(PERIOD_SIZE),
152         HW_PARAM(PERIOD_BYTES),
153         HW_PARAM(PERIODS),
154         HW_PARAM(BUFFER_TIME),
155         HW_PARAM(BUFFER_SIZE),
156         HW_PARAM(BUFFER_BYTES),
157         HW_PARAM(TICK_TIME),
158 };
159 #endif
160
161 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 
162                       struct snd_pcm_hw_params *params)
163 {
164         unsigned int k;
165         struct snd_pcm_hardware *hw;
166         struct snd_interval *i = NULL;
167         struct snd_mask *m = NULL;
168         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
169         unsigned int rstamps[constrs->rules_num];
170         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
171         unsigned int stamp = 2;
172         int changed, again;
173
174         params->info = 0;
175         params->fifo_size = 0;
176         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
177                 params->msbits = 0;
178         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
179                 params->rate_num = 0;
180                 params->rate_den = 0;
181         }
182
183         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
184                 m = hw_param_mask(params, k);
185                 if (snd_mask_empty(m))
186                         return -EINVAL;
187                 if (!(params->rmask & (1 << k)))
188                         continue;
189 #ifdef RULES_DEBUG
190                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
191                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
192 #endif
193                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
194 #ifdef RULES_DEBUG
195                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
196 #endif
197                 if (changed)
198                         params->cmask |= 1 << k;
199                 if (changed < 0)
200                         return changed;
201         }
202
203         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
204                 i = hw_param_interval(params, k);
205                 if (snd_interval_empty(i))
206                         return -EINVAL;
207                 if (!(params->rmask & (1 << k)))
208                         continue;
209 #ifdef RULES_DEBUG
210                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
211                 if (i->empty)
212                         printk("empty");
213                 else
214                         printk("%c%u %u%c", 
215                                i->openmin ? '(' : '[', i->min,
216                                i->max, i->openmax ? ')' : ']');
217                 printk(" -> ");
218 #endif
219                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
220 #ifdef RULES_DEBUG
221                 if (i->empty)
222                         printk("empty\n");
223                 else 
224                         printk("%c%u %u%c\n", 
225                                i->openmin ? '(' : '[', i->min,
226                                i->max, i->openmax ? ')' : ']');
227 #endif
228                 if (changed)
229                         params->cmask |= 1 << k;
230                 if (changed < 0)
231                         return changed;
232         }
233
234         for (k = 0; k < constrs->rules_num; k++)
235                 rstamps[k] = 0;
236         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 
237                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
238         do {
239                 again = 0;
240                 for (k = 0; k < constrs->rules_num; k++) {
241                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
242                         unsigned int d;
243                         int doit = 0;
244                         if (r->cond && !(r->cond & params->flags))
245                                 continue;
246                         for (d = 0; r->deps[d] >= 0; d++) {
247                                 if (vstamps[r->deps[d]] > rstamps[k]) {
248                                         doit = 1;
249                                         break;
250                                 }
251                         }
252                         if (!doit)
253                                 continue;
254 #ifdef RULES_DEBUG
255                         printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
256                         if (r->var >= 0) {
257                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
258                                 if (hw_is_mask(r->var)) {
259                                         m = hw_param_mask(params, r->var);
260                                         printk("%x", *m->bits);
261                                 } else {
262                                         i = hw_param_interval(params, r->var);
263                                         if (i->empty)
264                                                 printk("empty");
265                                         else
266                                                 printk("%c%u %u%c", 
267                                                        i->openmin ? '(' : '[', i->min,
268                                                        i->max, i->openmax ? ')' : ']');
269                                 }
270                         }
271 #endif
272                         changed = r->func(params, r);
273 #ifdef RULES_DEBUG
274                         if (r->var >= 0) {
275                                 printk(" -> ");
276                                 if (hw_is_mask(r->var))
277                                         printk("%x", *m->bits);
278                                 else {
279                                         if (i->empty)
280                                                 printk("empty");
281                                         else
282                                                 printk("%c%u %u%c", 
283                                                        i->openmin ? '(' : '[', i->min,
284                                                        i->max, i->openmax ? ')' : ']');
285                                 }
286                         }
287                         printk("\n");
288 #endif
289                         rstamps[k] = stamp;
290                         if (changed && r->var >= 0) {
291                                 params->cmask |= (1 << r->var);
292                                 vstamps[r->var] = stamp;
293                                 again = 1;
294                         }
295                         if (changed < 0)
296                                 return changed;
297                         stamp++;
298                 }
299         } while (again);
300         if (!params->msbits) {
301                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
302                 if (snd_interval_single(i))
303                         params->msbits = snd_interval_value(i);
304         }
305
306         if (!params->rate_den) {
307                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
308                 if (snd_interval_single(i)) {
309                         params->rate_num = snd_interval_value(i);
310                         params->rate_den = 1;
311                 }
312         }
313
314         hw = &substream->runtime->hw;
315         if (!params->info)
316                 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
317         if (!params->fifo_size) {
318                 if (snd_mask_min(&params->masks[SNDRV_PCM_HW_PARAM_FORMAT]) ==
319                     snd_mask_max(&params->masks[SNDRV_PCM_HW_PARAM_FORMAT]) &&
320                     snd_mask_min(&params->masks[SNDRV_PCM_HW_PARAM_CHANNELS]) ==
321                     snd_mask_max(&params->masks[SNDRV_PCM_HW_PARAM_CHANNELS])) {
322                         changed = substream->ops->ioctl(substream,
323                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
324                         if (changed < 0)
325                                 return changed;
326                 }
327         }
328         params->rmask = 0;
329         return 0;
330 }
331
332 EXPORT_SYMBOL(snd_pcm_hw_refine);
333
334 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
335                                   struct snd_pcm_hw_params __user * _params)
336 {
337         struct snd_pcm_hw_params *params;
338         int err;
339
340         params = memdup_user(_params, sizeof(*params));
341         if (IS_ERR(params))
342                 return PTR_ERR(params);
343
344         err = snd_pcm_hw_refine(substream, params);
345         if (copy_to_user(_params, params, sizeof(*params))) {
346                 if (!err)
347                         err = -EFAULT;
348         }
349
350         kfree(params);
351         return err;
352 }
353
354 static int period_to_usecs(struct snd_pcm_runtime *runtime)
355 {
356         int usecs;
357
358         if (! runtime->rate)
359                 return -1; /* invalid */
360
361         /* take 75% of period time as the deadline */
362         usecs = (750000 / runtime->rate) * runtime->period_size;
363         usecs += ((750000 % runtime->rate) * runtime->period_size) /
364                 runtime->rate;
365
366         return usecs;
367 }
368
369 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
370                              struct snd_pcm_hw_params *params)
371 {
372         struct snd_pcm_runtime *runtime;
373         int err, usecs;
374         unsigned int bits;
375         snd_pcm_uframes_t frames;
376
377         if (PCM_RUNTIME_CHECK(substream))
378                 return -ENXIO;
379         runtime = substream->runtime;
380         snd_pcm_stream_lock_irq(substream);
381         switch (runtime->status->state) {
382         case SNDRV_PCM_STATE_OPEN:
383         case SNDRV_PCM_STATE_SETUP:
384         case SNDRV_PCM_STATE_PREPARED:
385                 break;
386         default:
387                 snd_pcm_stream_unlock_irq(substream);
388                 return -EBADFD;
389         }
390         snd_pcm_stream_unlock_irq(substream);
391 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
392         if (!substream->oss.oss)
393 #endif
394                 if (atomic_read(&substream->mmap_count))
395                         return -EBADFD;
396
397         params->rmask = ~0U;
398         err = snd_pcm_hw_refine(substream, params);
399         if (err < 0)
400                 goto _error;
401
402         err = snd_pcm_hw_params_choose(substream, params);
403         if (err < 0)
404                 goto _error;
405
406         if (substream->ops->hw_params != NULL) {
407                 err = substream->ops->hw_params(substream, params);
408                 if (err < 0)
409                         goto _error;
410         }
411
412         runtime->access = params_access(params);
413         runtime->format = params_format(params);
414         runtime->subformat = params_subformat(params);
415         runtime->channels = params_channels(params);
416         runtime->rate = params_rate(params);
417         runtime->period_size = params_period_size(params);
418         runtime->periods = params_periods(params);
419         runtime->buffer_size = params_buffer_size(params);
420         runtime->info = params->info;
421         runtime->rate_num = params->rate_num;
422         runtime->rate_den = params->rate_den;
423
424         bits = snd_pcm_format_physical_width(runtime->format);
425         runtime->sample_bits = bits;
426         bits *= runtime->channels;
427         runtime->frame_bits = bits;
428         frames = 1;
429         while (bits % 8 != 0) {
430                 bits *= 2;
431                 frames *= 2;
432         }
433         runtime->byte_align = bits / 8;
434         runtime->min_align = frames;
435
436         /* Default sw params */
437         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
438         runtime->period_step = 1;
439         runtime->control->avail_min = runtime->period_size;
440         runtime->start_threshold = 1;
441         runtime->stop_threshold = runtime->buffer_size;
442         runtime->silence_threshold = 0;
443         runtime->silence_size = 0;
444         runtime->boundary = runtime->buffer_size;
445         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
446                 runtime->boundary *= 2;
447
448         snd_pcm_timer_resolution_change(substream);
449         runtime->status->state = SNDRV_PCM_STATE_SETUP;
450
451         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
452                                 substream->latency_id);
453         if ((usecs = period_to_usecs(runtime)) >= 0)
454                 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
455                                         substream->latency_id, usecs);
456         return 0;
457  _error:
458         /* hardware might be unuseable from this time,
459            so we force application to retry to set
460            the correct hardware parameter settings */
461         runtime->status->state = SNDRV_PCM_STATE_OPEN;
462         if (substream->ops->hw_free != NULL)
463                 substream->ops->hw_free(substream);
464         return err;
465 }
466
467 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
468                                   struct snd_pcm_hw_params __user * _params)
469 {
470         struct snd_pcm_hw_params *params;
471         int err;
472
473         params = memdup_user(_params, sizeof(*params));
474         if (IS_ERR(params))
475                 return PTR_ERR(params);
476
477         err = snd_pcm_hw_params(substream, params);
478         if (copy_to_user(_params, params, sizeof(*params))) {
479                 if (!err)
480                         err = -EFAULT;
481         }
482
483         kfree(params);
484         return err;
485 }
486
487 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
488 {
489         struct snd_pcm_runtime *runtime;
490         int result = 0;
491
492         if (PCM_RUNTIME_CHECK(substream))
493                 return -ENXIO;
494         runtime = substream->runtime;
495         snd_pcm_stream_lock_irq(substream);
496         switch (runtime->status->state) {
497         case SNDRV_PCM_STATE_SETUP:
498         case SNDRV_PCM_STATE_PREPARED:
499                 break;
500         default:
501                 snd_pcm_stream_unlock_irq(substream);
502                 return -EBADFD;
503         }
504         snd_pcm_stream_unlock_irq(substream);
505         if (atomic_read(&substream->mmap_count))
506                 return -EBADFD;
507         if (substream->ops->hw_free)
508                 result = substream->ops->hw_free(substream);
509         runtime->status->state = SNDRV_PCM_STATE_OPEN;
510         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
511                 substream->latency_id);
512         return result;
513 }
514
515 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
516                              struct snd_pcm_sw_params *params)
517 {
518         struct snd_pcm_runtime *runtime;
519
520         if (PCM_RUNTIME_CHECK(substream))
521                 return -ENXIO;
522         runtime = substream->runtime;
523         snd_pcm_stream_lock_irq(substream);
524         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
525                 snd_pcm_stream_unlock_irq(substream);
526                 return -EBADFD;
527         }
528         snd_pcm_stream_unlock_irq(substream);
529
530         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
531                 return -EINVAL;
532         if (params->avail_min == 0)
533                 return -EINVAL;
534         if (params->silence_size >= runtime->boundary) {
535                 if (params->silence_threshold != 0)
536                         return -EINVAL;
537         } else {
538                 if (params->silence_size > params->silence_threshold)
539                         return -EINVAL;
540                 if (params->silence_threshold > runtime->buffer_size)
541                         return -EINVAL;
542         }
543         snd_pcm_stream_lock_irq(substream);
544         runtime->tstamp_mode = params->tstamp_mode;
545         runtime->period_step = params->period_step;
546         runtime->control->avail_min = params->avail_min;
547         runtime->start_threshold = params->start_threshold;
548         runtime->stop_threshold = params->stop_threshold;
549         runtime->silence_threshold = params->silence_threshold;
550         runtime->silence_size = params->silence_size;
551         params->boundary = runtime->boundary;
552         if (snd_pcm_running(substream)) {
553                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
554                     runtime->silence_size > 0)
555                         snd_pcm_playback_silence(substream, ULONG_MAX);
556                 wake_up(&runtime->sleep);
557         }
558         snd_pcm_stream_unlock_irq(substream);
559         return 0;
560 }
561
562 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
563                                   struct snd_pcm_sw_params __user * _params)
564 {
565         struct snd_pcm_sw_params params;
566         int err;
567         if (copy_from_user(&params, _params, sizeof(params)))
568                 return -EFAULT;
569         err = snd_pcm_sw_params(substream, &params);
570         if (copy_to_user(_params, &params, sizeof(params)))
571                 return -EFAULT;
572         return err;
573 }
574
575 int snd_pcm_status(struct snd_pcm_substream *substream,
576                    struct snd_pcm_status *status)
577 {
578         struct snd_pcm_runtime *runtime = substream->runtime;
579
580         snd_pcm_stream_lock_irq(substream);
581         status->state = runtime->status->state;
582         status->suspended_state = runtime->status->suspended_state;
583         if (status->state == SNDRV_PCM_STATE_OPEN)
584                 goto _end;
585         status->trigger_tstamp = runtime->trigger_tstamp;
586         if (snd_pcm_running(substream)) {
587                 snd_pcm_update_hw_ptr(substream);
588                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
589                         status->tstamp = runtime->status->tstamp;
590                         goto _tstamp_end;
591                 }
592         }
593         snd_pcm_gettime(runtime, &status->tstamp);
594  _tstamp_end:
595         status->appl_ptr = runtime->control->appl_ptr;
596         status->hw_ptr = runtime->status->hw_ptr;
597         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
598                 status->avail = snd_pcm_playback_avail(runtime);
599                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
600                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
601                         status->delay = runtime->buffer_size - status->avail;
602                         status->delay += runtime->delay;
603                 } else
604                         status->delay = 0;
605         } else {
606                 status->avail = snd_pcm_capture_avail(runtime);
607                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
608                         status->delay = status->avail + runtime->delay;
609                 else
610                         status->delay = 0;
611         }
612         status->avail_max = runtime->avail_max;
613         status->overrange = runtime->overrange;
614         runtime->avail_max = 0;
615         runtime->overrange = 0;
616  _end:
617         snd_pcm_stream_unlock_irq(substream);
618         return 0;
619 }
620
621 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
622                                struct snd_pcm_status __user * _status)
623 {
624         struct snd_pcm_status status;
625         int res;
626         
627         memset(&status, 0, sizeof(status));
628         res = snd_pcm_status(substream, &status);
629         if (res < 0)
630                 return res;
631         if (copy_to_user(_status, &status, sizeof(status)))
632                 return -EFAULT;
633         return 0;
634 }
635
636 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
637                                 struct snd_pcm_channel_info * info)
638 {
639         struct snd_pcm_runtime *runtime;
640         unsigned int channel;
641         
642         channel = info->channel;
643         runtime = substream->runtime;
644         snd_pcm_stream_lock_irq(substream);
645         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
646                 snd_pcm_stream_unlock_irq(substream);
647                 return -EBADFD;
648         }
649         snd_pcm_stream_unlock_irq(substream);
650         if (channel >= runtime->channels)
651                 return -EINVAL;
652         memset(info, 0, sizeof(*info));
653         info->channel = channel;
654         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
655 }
656
657 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
658                                      struct snd_pcm_channel_info __user * _info)
659 {
660         struct snd_pcm_channel_info info;
661         int res;
662         
663         if (copy_from_user(&info, _info, sizeof(info)))
664                 return -EFAULT;
665         res = snd_pcm_channel_info(substream, &info);
666         if (res < 0)
667                 return res;
668         if (copy_to_user(_info, &info, sizeof(info)))
669                 return -EFAULT;
670         return 0;
671 }
672
673 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
674 {
675         struct snd_pcm_runtime *runtime = substream->runtime;
676         if (runtime->trigger_master == NULL)
677                 return;
678         if (runtime->trigger_master == substream) {
679                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
680         } else {
681                 snd_pcm_trigger_tstamp(runtime->trigger_master);
682                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
683         }
684         runtime->trigger_master = NULL;
685 }
686
687 struct action_ops {
688         int (*pre_action)(struct snd_pcm_substream *substream, int state);
689         int (*do_action)(struct snd_pcm_substream *substream, int state);
690         void (*undo_action)(struct snd_pcm_substream *substream, int state);
691         void (*post_action)(struct snd_pcm_substream *substream, int state);
692 };
693
694 /*
695  *  this functions is core for handling of linked stream
696  *  Note: the stream state might be changed also on failure
697  *  Note2: call with calling stream lock + link lock
698  */
699 static int snd_pcm_action_group(struct action_ops *ops,
700                                 struct snd_pcm_substream *substream,
701                                 int state, int do_lock)
702 {
703         struct snd_pcm_substream *s = NULL;
704         struct snd_pcm_substream *s1;
705         int res = 0;
706
707         snd_pcm_group_for_each_entry(s, substream) {
708                 if (do_lock && s != substream)
709                         spin_lock_nested(&s->self_group.lock,
710                                          SINGLE_DEPTH_NESTING);
711                 res = ops->pre_action(s, state);
712                 if (res < 0)
713                         goto _unlock;
714         }
715         snd_pcm_group_for_each_entry(s, substream) {
716                 res = ops->do_action(s, state);
717                 if (res < 0) {
718                         if (ops->undo_action) {
719                                 snd_pcm_group_for_each_entry(s1, substream) {
720                                         if (s1 == s) /* failed stream */
721                                                 break;
722                                         ops->undo_action(s1, state);
723                                 }
724                         }
725                         s = NULL; /* unlock all */
726                         goto _unlock;
727                 }
728         }
729         snd_pcm_group_for_each_entry(s, substream) {
730                 ops->post_action(s, state);
731         }
732  _unlock:
733         if (do_lock) {
734                 /* unlock streams */
735                 snd_pcm_group_for_each_entry(s1, substream) {
736                         if (s1 != substream)
737                                 spin_unlock(&s1->self_group.lock);
738                         if (s1 == s)    /* end */
739                                 break;
740                 }
741         }
742         return res;
743 }
744
745 /*
746  *  Note: call with stream lock
747  */
748 static int snd_pcm_action_single(struct action_ops *ops,
749                                  struct snd_pcm_substream *substream,
750                                  int state)
751 {
752         int res;
753         
754         res = ops->pre_action(substream, state);
755         if (res < 0)
756                 return res;
757         res = ops->do_action(substream, state);
758         if (res == 0)
759                 ops->post_action(substream, state);
760         else if (ops->undo_action)
761                 ops->undo_action(substream, state);
762         return res;
763 }
764
765 /*
766  *  Note: call with stream lock
767  */
768 static int snd_pcm_action(struct action_ops *ops,
769                           struct snd_pcm_substream *substream,
770                           int state)
771 {
772         int res;
773
774         if (snd_pcm_stream_linked(substream)) {
775                 if (!spin_trylock(&substream->group->lock)) {
776                         spin_unlock(&substream->self_group.lock);
777                         spin_lock(&substream->group->lock);
778                         spin_lock(&substream->self_group.lock);
779                 }
780                 res = snd_pcm_action_group(ops, substream, state, 1);
781                 spin_unlock(&substream->group->lock);
782         } else {
783                 res = snd_pcm_action_single(ops, substream, state);
784         }
785         return res;
786 }
787
788 /*
789  *  Note: don't use any locks before
790  */
791 static int snd_pcm_action_lock_irq(struct action_ops *ops,
792                                    struct snd_pcm_substream *substream,
793                                    int state)
794 {
795         int res;
796
797         read_lock_irq(&snd_pcm_link_rwlock);
798         if (snd_pcm_stream_linked(substream)) {
799                 spin_lock(&substream->group->lock);
800                 spin_lock(&substream->self_group.lock);
801                 res = snd_pcm_action_group(ops, substream, state, 1);
802                 spin_unlock(&substream->self_group.lock);
803                 spin_unlock(&substream->group->lock);
804         } else {
805                 spin_lock(&substream->self_group.lock);
806                 res = snd_pcm_action_single(ops, substream, state);
807                 spin_unlock(&substream->self_group.lock);
808         }
809         read_unlock_irq(&snd_pcm_link_rwlock);
810         return res;
811 }
812
813 /*
814  */
815 static int snd_pcm_action_nonatomic(struct action_ops *ops,
816                                     struct snd_pcm_substream *substream,
817                                     int state)
818 {
819         int res;
820
821         down_read(&snd_pcm_link_rwsem);
822         if (snd_pcm_stream_linked(substream))
823                 res = snd_pcm_action_group(ops, substream, state, 0);
824         else
825                 res = snd_pcm_action_single(ops, substream, state);
826         up_read(&snd_pcm_link_rwsem);
827         return res;
828 }
829
830 /*
831  * start callbacks
832  */
833 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
834 {
835         struct snd_pcm_runtime *runtime = substream->runtime;
836         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
837                 return -EBADFD;
838         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
839             !snd_pcm_playback_data(substream))
840                 return -EPIPE;
841         runtime->trigger_master = substream;
842         return 0;
843 }
844
845 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
846 {
847         if (substream->runtime->trigger_master != substream)
848                 return 0;
849         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
850 }
851
852 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
853 {
854         if (substream->runtime->trigger_master == substream)
855                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
856 }
857
858 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
859 {
860         struct snd_pcm_runtime *runtime = substream->runtime;
861         snd_pcm_trigger_tstamp(substream);
862         runtime->hw_ptr_jiffies = jiffies;
863         runtime->status->state = state;
864         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
865             runtime->silence_size > 0)
866                 snd_pcm_playback_silence(substream, ULONG_MAX);
867         if (substream->timer)
868                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
869                                  &runtime->trigger_tstamp);
870 }
871
872 static struct action_ops snd_pcm_action_start = {
873         .pre_action = snd_pcm_pre_start,
874         .do_action = snd_pcm_do_start,
875         .undo_action = snd_pcm_undo_start,
876         .post_action = snd_pcm_post_start
877 };
878
879 /**
880  * snd_pcm_start - start all linked streams
881  * @substream: the PCM substream instance
882  */
883 int snd_pcm_start(struct snd_pcm_substream *substream)
884 {
885         return snd_pcm_action(&snd_pcm_action_start, substream,
886                               SNDRV_PCM_STATE_RUNNING);
887 }
888
889 /*
890  * stop callbacks
891  */
892 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
893 {
894         struct snd_pcm_runtime *runtime = substream->runtime;
895         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
896                 return -EBADFD;
897         runtime->trigger_master = substream;
898         return 0;
899 }
900
901 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
902 {
903         if (substream->runtime->trigger_master == substream &&
904             snd_pcm_running(substream))
905                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
906         return 0; /* unconditonally stop all substreams */
907 }
908
909 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
910 {
911         struct snd_pcm_runtime *runtime = substream->runtime;
912         if (runtime->status->state != state) {
913                 snd_pcm_trigger_tstamp(substream);
914                 if (substream->timer)
915                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
916                                          &runtime->trigger_tstamp);
917                 runtime->status->state = state;
918         }
919         wake_up(&runtime->sleep);
920 }
921
922 static struct action_ops snd_pcm_action_stop = {
923         .pre_action = snd_pcm_pre_stop,
924         .do_action = snd_pcm_do_stop,
925         .post_action = snd_pcm_post_stop
926 };
927
928 /**
929  * snd_pcm_stop - try to stop all running streams in the substream group
930  * @substream: the PCM substream instance
931  * @state: PCM state after stopping the stream
932  *
933  * The state of each stream is then changed to the given state unconditionally.
934  */
935 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
936 {
937         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
938 }
939
940 EXPORT_SYMBOL(snd_pcm_stop);
941
942 /**
943  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
944  * @substream: the PCM substream
945  *
946  * After stopping, the state is changed to SETUP.
947  * Unlike snd_pcm_stop(), this affects only the given stream.
948  */
949 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
950 {
951         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
952                                      SNDRV_PCM_STATE_SETUP);
953 }
954
955 /*
956  * pause callbacks
957  */
958 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
959 {
960         struct snd_pcm_runtime *runtime = substream->runtime;
961         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
962                 return -ENOSYS;
963         if (push) {
964                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
965                         return -EBADFD;
966         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
967                 return -EBADFD;
968         runtime->trigger_master = substream;
969         return 0;
970 }
971
972 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
973 {
974         if (substream->runtime->trigger_master != substream)
975                 return 0;
976         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
977          * a delta betwen the current jiffies, this gives a large enough
978          * delta, effectively to skip the check once.
979          */
980         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
981         return substream->ops->trigger(substream,
982                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
983                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
984 }
985
986 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
987 {
988         if (substream->runtime->trigger_master == substream)
989                 substream->ops->trigger(substream,
990                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
991                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
992 }
993
994 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
995 {
996         struct snd_pcm_runtime *runtime = substream->runtime;
997         snd_pcm_trigger_tstamp(substream);
998         if (push) {
999                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1000                 if (substream->timer)
1001                         snd_timer_notify(substream->timer,
1002                                          SNDRV_TIMER_EVENT_MPAUSE,
1003                                          &runtime->trigger_tstamp);
1004                 wake_up(&runtime->sleep);
1005         } else {
1006                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1007                 if (substream->timer)
1008                         snd_timer_notify(substream->timer,
1009                                          SNDRV_TIMER_EVENT_MCONTINUE,
1010                                          &runtime->trigger_tstamp);
1011         }
1012 }
1013
1014 static struct action_ops snd_pcm_action_pause = {
1015         .pre_action = snd_pcm_pre_pause,
1016         .do_action = snd_pcm_do_pause,
1017         .undo_action = snd_pcm_undo_pause,
1018         .post_action = snd_pcm_post_pause
1019 };
1020
1021 /*
1022  * Push/release the pause for all linked streams.
1023  */
1024 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1025 {
1026         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1027 }
1028
1029 #ifdef CONFIG_PM
1030 /* suspend */
1031
1032 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1033 {
1034         struct snd_pcm_runtime *runtime = substream->runtime;
1035         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1036                 return -EBUSY;
1037         runtime->trigger_master = substream;
1038         return 0;
1039 }
1040
1041 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1042 {
1043         struct snd_pcm_runtime *runtime = substream->runtime;
1044         if (runtime->trigger_master != substream)
1045                 return 0;
1046         if (! snd_pcm_running(substream))
1047                 return 0;
1048         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1049         return 0; /* suspend unconditionally */
1050 }
1051
1052 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1053 {
1054         struct snd_pcm_runtime *runtime = substream->runtime;
1055         snd_pcm_trigger_tstamp(substream);
1056         if (substream->timer)
1057                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1058                                  &runtime->trigger_tstamp);
1059         runtime->status->suspended_state = runtime->status->state;
1060         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1061         wake_up(&runtime->sleep);
1062 }
1063
1064 static struct action_ops snd_pcm_action_suspend = {
1065         .pre_action = snd_pcm_pre_suspend,
1066         .do_action = snd_pcm_do_suspend,
1067         .post_action = snd_pcm_post_suspend
1068 };
1069
1070 /**
1071  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1072  * @substream: the PCM substream
1073  *
1074  * After this call, all streams are changed to SUSPENDED state.
1075  */
1076 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1077 {
1078         int err;
1079         unsigned long flags;
1080
1081         if (! substream)
1082                 return 0;
1083
1084         snd_pcm_stream_lock_irqsave(substream, flags);
1085         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1086         snd_pcm_stream_unlock_irqrestore(substream, flags);
1087         return err;
1088 }
1089
1090 EXPORT_SYMBOL(snd_pcm_suspend);
1091
1092 /**
1093  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1094  * @pcm: the PCM instance
1095  *
1096  * After this call, all streams are changed to SUSPENDED state.
1097  */
1098 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1099 {
1100         struct snd_pcm_substream *substream;
1101         int stream, err = 0;
1102
1103         if (! pcm)
1104                 return 0;
1105
1106         for (stream = 0; stream < 2; stream++) {
1107                 for (substream = pcm->streams[stream].substream;
1108                      substream; substream = substream->next) {
1109                         /* FIXME: the open/close code should lock this as well */
1110                         if (substream->runtime == NULL)
1111                                 continue;
1112                         err = snd_pcm_suspend(substream);
1113                         if (err < 0 && err != -EBUSY)
1114                                 return err;
1115                 }
1116         }
1117         return 0;
1118 }
1119
1120 EXPORT_SYMBOL(snd_pcm_suspend_all);
1121
1122 /* resume */
1123
1124 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1125 {
1126         struct snd_pcm_runtime *runtime = substream->runtime;
1127         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1128                 return -ENOSYS;
1129         runtime->trigger_master = substream;
1130         return 0;
1131 }
1132
1133 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1134 {
1135         struct snd_pcm_runtime *runtime = substream->runtime;
1136         if (runtime->trigger_master != substream)
1137                 return 0;
1138         /* DMA not running previously? */
1139         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1140             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1141              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1142                 return 0;
1143         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1144 }
1145
1146 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1147 {
1148         if (substream->runtime->trigger_master == substream &&
1149             snd_pcm_running(substream))
1150                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1151 }
1152
1153 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1154 {
1155         struct snd_pcm_runtime *runtime = substream->runtime;
1156         snd_pcm_trigger_tstamp(substream);
1157         if (substream->timer)
1158                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1159                                  &runtime->trigger_tstamp);
1160         runtime->status->state = runtime->status->suspended_state;
1161 }
1162
1163 static struct action_ops snd_pcm_action_resume = {
1164         .pre_action = snd_pcm_pre_resume,
1165         .do_action = snd_pcm_do_resume,
1166         .undo_action = snd_pcm_undo_resume,
1167         .post_action = snd_pcm_post_resume
1168 };
1169
1170 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1171 {
1172         struct snd_card *card = substream->pcm->card;
1173         int res;
1174
1175         snd_power_lock(card);
1176         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1177                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1178         snd_power_unlock(card);
1179         return res;
1180 }
1181
1182 #else
1183
1184 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1185 {
1186         return -ENOSYS;
1187 }
1188
1189 #endif /* CONFIG_PM */
1190
1191 /*
1192  * xrun ioctl
1193  *
1194  * Change the RUNNING stream(s) to XRUN state.
1195  */
1196 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1197 {
1198         struct snd_card *card = substream->pcm->card;
1199         struct snd_pcm_runtime *runtime = substream->runtime;
1200         int result;
1201
1202         snd_power_lock(card);
1203         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1204                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1205                 if (result < 0)
1206                         goto _unlock;
1207         }
1208
1209         snd_pcm_stream_lock_irq(substream);
1210         switch (runtime->status->state) {
1211         case SNDRV_PCM_STATE_XRUN:
1212                 result = 0;     /* already there */
1213                 break;
1214         case SNDRV_PCM_STATE_RUNNING:
1215                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1216                 break;
1217         default:
1218                 result = -EBADFD;
1219         }
1220         snd_pcm_stream_unlock_irq(substream);
1221  _unlock:
1222         snd_power_unlock(card);
1223         return result;
1224 }
1225
1226 /*
1227  * reset ioctl
1228  */
1229 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1230 {
1231         struct snd_pcm_runtime *runtime = substream->runtime;
1232         switch (runtime->status->state) {
1233         case SNDRV_PCM_STATE_RUNNING:
1234         case SNDRV_PCM_STATE_PREPARED:
1235         case SNDRV_PCM_STATE_PAUSED:
1236         case SNDRV_PCM_STATE_SUSPENDED:
1237                 return 0;
1238         default:
1239                 return -EBADFD;
1240         }
1241 }
1242
1243 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1244 {
1245         struct snd_pcm_runtime *runtime = substream->runtime;
1246         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1247         if (err < 0)
1248                 return err;
1249         runtime->hw_ptr_base = 0;
1250         runtime->silence_start = runtime->status->hw_ptr;
1251         runtime->silence_filled = 0;
1252         return 0;
1253 }
1254
1255 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1256 {
1257         struct snd_pcm_runtime *runtime = substream->runtime;
1258         runtime->control->appl_ptr = runtime->status->hw_ptr;
1259         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1260             runtime->silence_size > 0)
1261                 snd_pcm_playback_silence(substream, ULONG_MAX);
1262 }
1263
1264 static struct action_ops snd_pcm_action_reset = {
1265         .pre_action = snd_pcm_pre_reset,
1266         .do_action = snd_pcm_do_reset,
1267         .post_action = snd_pcm_post_reset
1268 };
1269
1270 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1271 {
1272         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1273 }
1274
1275 /*
1276  * prepare ioctl
1277  */
1278 /* we use the second argument for updating f_flags */
1279 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1280                                int f_flags)
1281 {
1282         struct snd_pcm_runtime *runtime = substream->runtime;
1283         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1284             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1285                 return -EBADFD;
1286         if (snd_pcm_running(substream))
1287                 return -EBUSY;
1288         substream->f_flags = f_flags;
1289         return 0;
1290 }
1291
1292 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1293 {
1294         int err;
1295         err = substream->ops->prepare(substream);
1296         if (err < 0)
1297                 return err;
1298         return snd_pcm_do_reset(substream, 0);
1299 }
1300
1301 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1302 {
1303         struct snd_pcm_runtime *runtime = substream->runtime;
1304         runtime->control->appl_ptr = runtime->status->hw_ptr;
1305         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1306 }
1307
1308 static struct action_ops snd_pcm_action_prepare = {
1309         .pre_action = snd_pcm_pre_prepare,
1310         .do_action = snd_pcm_do_prepare,
1311         .post_action = snd_pcm_post_prepare
1312 };
1313
1314 /**
1315  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1316  * @substream: the PCM substream instance
1317  * @file: file to refer f_flags
1318  */
1319 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1320                            struct file *file)
1321 {
1322         int res;
1323         struct snd_card *card = substream->pcm->card;
1324         int f_flags;
1325
1326         if (file)
1327                 f_flags = file->f_flags;
1328         else
1329                 f_flags = substream->f_flags;
1330
1331         snd_power_lock(card);
1332         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1333                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1334                                                substream, f_flags);
1335         snd_power_unlock(card);
1336         return res;
1337 }
1338
1339 /*
1340  * drain ioctl
1341  */
1342
1343 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1344 {
1345         substream->runtime->trigger_master = substream;
1346         return 0;
1347 }
1348
1349 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1350 {
1351         struct snd_pcm_runtime *runtime = substream->runtime;
1352         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1353                 switch (runtime->status->state) {
1354                 case SNDRV_PCM_STATE_PREPARED:
1355                         /* start playback stream if possible */
1356                         if (! snd_pcm_playback_empty(substream)) {
1357                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1358                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1359                         }
1360                         break;
1361                 case SNDRV_PCM_STATE_RUNNING:
1362                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1363                         break;
1364                 default:
1365                         break;
1366                 }
1367         } else {
1368                 /* stop running stream */
1369                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1370                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1371                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1372                         snd_pcm_do_stop(substream, new_state);
1373                         snd_pcm_post_stop(substream, new_state);
1374                 }
1375         }
1376         return 0;
1377 }
1378
1379 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1380 {
1381 }
1382
1383 static struct action_ops snd_pcm_action_drain_init = {
1384         .pre_action = snd_pcm_pre_drain_init,
1385         .do_action = snd_pcm_do_drain_init,
1386         .post_action = snd_pcm_post_drain_init
1387 };
1388
1389 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1390
1391 /*
1392  * Drain the stream(s).
1393  * When the substream is linked, sync until the draining of all playback streams
1394  * is finished.
1395  * After this call, all streams are supposed to be either SETUP or DRAINING
1396  * (capture only) state.
1397  */
1398 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1399                          struct file *file)
1400 {
1401         struct snd_card *card;
1402         struct snd_pcm_runtime *runtime;
1403         struct snd_pcm_substream *s;
1404         wait_queue_t wait;
1405         int result = 0;
1406         int nonblock = 0;
1407
1408         card = substream->pcm->card;
1409         runtime = substream->runtime;
1410
1411         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1412                 return -EBADFD;
1413
1414         snd_power_lock(card);
1415         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1416                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1417                 if (result < 0) {
1418                         snd_power_unlock(card);
1419                         return result;
1420                 }
1421         }
1422
1423         if (file) {
1424                 if (file->f_flags & O_NONBLOCK)
1425                         nonblock = 1;
1426         } else if (substream->f_flags & O_NONBLOCK)
1427                 nonblock = 1;
1428
1429         down_read(&snd_pcm_link_rwsem);
1430         snd_pcm_stream_lock_irq(substream);
1431         /* resume pause */
1432         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1433                 snd_pcm_pause(substream, 0);
1434
1435         /* pre-start/stop - all running streams are changed to DRAINING state */
1436         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1437         if (result < 0)
1438                 goto unlock;
1439         /* in non-blocking, we don't wait in ioctl but let caller poll */
1440         if (nonblock) {
1441                 result = -EAGAIN;
1442                 goto unlock;
1443         }
1444
1445         for (;;) {
1446                 long tout;
1447                 struct snd_pcm_runtime *to_check;
1448                 if (signal_pending(current)) {
1449                         result = -ERESTARTSYS;
1450                         break;
1451                 }
1452                 /* find a substream to drain */
1453                 to_check = NULL;
1454                 snd_pcm_group_for_each_entry(s, substream) {
1455                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1456                                 continue;
1457                         runtime = s->runtime;
1458                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1459                                 to_check = runtime;
1460                                 break;
1461                         }
1462                 }
1463                 if (!to_check)
1464                         break; /* all drained */
1465                 init_waitqueue_entry(&wait, current);
1466                 add_wait_queue(&to_check->sleep, &wait);
1467                 set_current_state(TASK_INTERRUPTIBLE);
1468                 snd_pcm_stream_unlock_irq(substream);
1469                 up_read(&snd_pcm_link_rwsem);
1470                 snd_power_unlock(card);
1471                 tout = schedule_timeout(10 * HZ);
1472                 snd_power_lock(card);
1473                 down_read(&snd_pcm_link_rwsem);
1474                 snd_pcm_stream_lock_irq(substream);
1475                 remove_wait_queue(&to_check->sleep, &wait);
1476                 if (tout == 0) {
1477                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1478                                 result = -ESTRPIPE;
1479                         else {
1480                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1481                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1482                                 result = -EIO;
1483                         }
1484                         break;
1485                 }
1486         }
1487
1488  unlock:
1489         snd_pcm_stream_unlock_irq(substream);
1490         up_read(&snd_pcm_link_rwsem);
1491         snd_power_unlock(card);
1492
1493         return result;
1494 }
1495
1496 /*
1497  * drop ioctl
1498  *
1499  * Immediately put all linked substreams into SETUP state.
1500  */
1501 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1502 {
1503         struct snd_pcm_runtime *runtime;
1504         struct snd_card *card;
1505         int result = 0;
1506         
1507         if (PCM_RUNTIME_CHECK(substream))
1508                 return -ENXIO;
1509         runtime = substream->runtime;
1510         card = substream->pcm->card;
1511
1512         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1513             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1514             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1515                 return -EBADFD;
1516
1517         snd_pcm_stream_lock_irq(substream);
1518         /* resume pause */
1519         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1520                 snd_pcm_pause(substream, 0);
1521
1522         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1523         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1524         snd_pcm_stream_unlock_irq(substream);
1525
1526         return result;
1527 }
1528
1529
1530 /* WARNING: Don't forget to fput back the file */
1531 static struct file *snd_pcm_file_fd(int fd)
1532 {
1533         struct file *file;
1534         struct inode *inode;
1535         unsigned int minor;
1536
1537         file = fget(fd);
1538         if (!file)
1539                 return NULL;
1540         inode = file->f_path.dentry->d_inode;
1541         if (!S_ISCHR(inode->i_mode) ||
1542             imajor(inode) != snd_major) {
1543                 fput(file);
1544                 return NULL;
1545         }
1546         minor = iminor(inode);
1547         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1548             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1549                 fput(file);
1550                 return NULL;
1551         }
1552         return file;
1553 }
1554
1555 /*
1556  * PCM link handling
1557  */
1558 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1559 {
1560         int res = 0;
1561         struct file *file;
1562         struct snd_pcm_file *pcm_file;
1563         struct snd_pcm_substream *substream1;
1564
1565         file = snd_pcm_file_fd(fd);
1566         if (!file)
1567                 return -EBADFD;
1568         pcm_file = file->private_data;
1569         substream1 = pcm_file->substream;
1570         down_write(&snd_pcm_link_rwsem);
1571         write_lock_irq(&snd_pcm_link_rwlock);
1572         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1573             substream->runtime->status->state != substream1->runtime->status->state) {
1574                 res = -EBADFD;
1575                 goto _end;
1576         }
1577         if (snd_pcm_stream_linked(substream1)) {
1578                 res = -EALREADY;
1579                 goto _end;
1580         }
1581         if (!snd_pcm_stream_linked(substream)) {
1582                 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1583                 if (substream->group == NULL) {
1584                         res = -ENOMEM;
1585                         goto _end;
1586                 }
1587                 spin_lock_init(&substream->group->lock);
1588                 INIT_LIST_HEAD(&substream->group->substreams);
1589                 list_add_tail(&substream->link_list, &substream->group->substreams);
1590                 substream->group->count = 1;
1591         }
1592         list_add_tail(&substream1->link_list, &substream->group->substreams);
1593         substream->group->count++;
1594         substream1->group = substream->group;
1595  _end:
1596         write_unlock_irq(&snd_pcm_link_rwlock);
1597         up_write(&snd_pcm_link_rwsem);
1598         fput(file);
1599         return res;
1600 }
1601
1602 static void relink_to_local(struct snd_pcm_substream *substream)
1603 {
1604         substream->group = &substream->self_group;
1605         INIT_LIST_HEAD(&substream->self_group.substreams);
1606         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1607 }
1608
1609 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1610 {
1611         struct snd_pcm_substream *s;
1612         int res = 0;
1613
1614         down_write(&snd_pcm_link_rwsem);
1615         write_lock_irq(&snd_pcm_link_rwlock);
1616         if (!snd_pcm_stream_linked(substream)) {
1617                 res = -EALREADY;
1618                 goto _end;
1619         }
1620         list_del(&substream->link_list);
1621         substream->group->count--;
1622         if (substream->group->count == 1) {     /* detach the last stream, too */
1623                 snd_pcm_group_for_each_entry(s, substream) {
1624                         relink_to_local(s);
1625                         break;
1626                 }
1627                 kfree(substream->group);
1628         }
1629         relink_to_local(substream);
1630        _end:
1631         write_unlock_irq(&snd_pcm_link_rwlock);
1632         up_write(&snd_pcm_link_rwsem);
1633         return res;
1634 }
1635
1636 /*
1637  * hw configurator
1638  */
1639 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1640                                struct snd_pcm_hw_rule *rule)
1641 {
1642         struct snd_interval t;
1643         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1644                      hw_param_interval_c(params, rule->deps[1]), &t);
1645         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1646 }
1647
1648 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1649                                struct snd_pcm_hw_rule *rule)
1650 {
1651         struct snd_interval t;
1652         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1653                      hw_param_interval_c(params, rule->deps[1]), &t);
1654         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1655 }
1656
1657 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1658                                    struct snd_pcm_hw_rule *rule)
1659 {
1660         struct snd_interval t;
1661         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1662                          hw_param_interval_c(params, rule->deps[1]),
1663                          (unsigned long) rule->private, &t);
1664         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1665 }
1666
1667 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1668                                    struct snd_pcm_hw_rule *rule)
1669 {
1670         struct snd_interval t;
1671         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1672                          (unsigned long) rule->private,
1673                          hw_param_interval_c(params, rule->deps[1]), &t);
1674         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1675 }
1676
1677 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1678                                   struct snd_pcm_hw_rule *rule)
1679 {
1680         unsigned int k;
1681         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1682         struct snd_mask m;
1683         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1684         snd_mask_any(&m);
1685         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1686                 int bits;
1687                 if (! snd_mask_test(mask, k))
1688                         continue;
1689                 bits = snd_pcm_format_physical_width(k);
1690                 if (bits <= 0)
1691                         continue; /* ignore invalid formats */
1692                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1693                         snd_mask_reset(&m, k);
1694         }
1695         return snd_mask_refine(mask, &m);
1696 }
1697
1698 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1699                                        struct snd_pcm_hw_rule *rule)
1700 {
1701         struct snd_interval t;
1702         unsigned int k;
1703         t.min = UINT_MAX;
1704         t.max = 0;
1705         t.openmin = 0;
1706         t.openmax = 0;
1707         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1708                 int bits;
1709                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1710                         continue;
1711                 bits = snd_pcm_format_physical_width(k);
1712                 if (bits <= 0)
1713                         continue; /* ignore invalid formats */
1714                 if (t.min > (unsigned)bits)
1715                         t.min = bits;
1716                 if (t.max < (unsigned)bits)
1717                         t.max = bits;
1718         }
1719         t.integer = 1;
1720         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1721 }
1722
1723 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1724 #error "Change this table"
1725 #endif
1726
1727 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1728                                  48000, 64000, 88200, 96000, 176400, 192000 };
1729
1730 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1731         .count = ARRAY_SIZE(rates),
1732         .list = rates,
1733 };
1734
1735 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1736                                 struct snd_pcm_hw_rule *rule)
1737 {
1738         struct snd_pcm_hardware *hw = rule->private;
1739         return snd_interval_list(hw_param_interval(params, rule->var),
1740                                  snd_pcm_known_rates.count,
1741                                  snd_pcm_known_rates.list, hw->rates);
1742 }               
1743
1744 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1745                                             struct snd_pcm_hw_rule *rule)
1746 {
1747         struct snd_interval t;
1748         struct snd_pcm_substream *substream = rule->private;
1749         t.min = 0;
1750         t.max = substream->buffer_bytes_max;
1751         t.openmin = 0;
1752         t.openmax = 0;
1753         t.integer = 1;
1754         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1755 }               
1756
1757 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1758 {
1759         struct snd_pcm_runtime *runtime = substream->runtime;
1760         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1761         int k, err;
1762
1763         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1764                 snd_mask_any(constrs_mask(constrs, k));
1765         }
1766
1767         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1768                 snd_interval_any(constrs_interval(constrs, k));
1769         }
1770
1771         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1772         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1773         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1774         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1775         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1776
1777         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1778                                    snd_pcm_hw_rule_format, NULL,
1779                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1780         if (err < 0)
1781                 return err;
1782         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1783                                   snd_pcm_hw_rule_sample_bits, NULL,
1784                                   SNDRV_PCM_HW_PARAM_FORMAT, 
1785                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1786         if (err < 0)
1787                 return err;
1788         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1789                                   snd_pcm_hw_rule_div, NULL,
1790                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1791         if (err < 0)
1792                 return err;
1793         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1794                                   snd_pcm_hw_rule_mul, NULL,
1795                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1796         if (err < 0)
1797                 return err;
1798         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1799                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1800                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1801         if (err < 0)
1802                 return err;
1803         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1804                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1805                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1806         if (err < 0)
1807                 return err;
1808         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 
1809                                   snd_pcm_hw_rule_div, NULL,
1810                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1811         if (err < 0)
1812                 return err;
1813         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1814                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1815                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1816         if (err < 0)
1817                 return err;
1818         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1819                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1820                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1821         if (err < 0)
1822                 return err;
1823         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 
1824                                   snd_pcm_hw_rule_div, NULL,
1825                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1826         if (err < 0)
1827                 return err;
1828         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1829                                   snd_pcm_hw_rule_div, NULL,
1830                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1831         if (err < 0)
1832                 return err;
1833         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1834                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1835                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1836         if (err < 0)
1837                 return err;
1838         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1839                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1840                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1841         if (err < 0)
1842                 return err;
1843         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1844                                   snd_pcm_hw_rule_mul, NULL,
1845                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1846         if (err < 0)
1847                 return err;
1848         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1849                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1850                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1851         if (err < 0)
1852                 return err;
1853         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1854                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1855                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1856         if (err < 0)
1857                 return err;
1858         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 
1859                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1860                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1861         if (err < 0)
1862                 return err;
1863         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
1864                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1865                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 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_TIME, 
1869                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1870                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 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_TIME, 
1874                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1875                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1876         if (err < 0)
1877                 return err;
1878         return 0;
1879 }
1880
1881 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1882 {
1883         struct snd_pcm_runtime *runtime = substream->runtime;
1884         struct snd_pcm_hardware *hw = &runtime->hw;
1885         int err;
1886         unsigned int mask = 0;
1887
1888         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1889                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1890         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1891                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1892         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1893                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1894                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1895                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1896                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1897                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1898                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1899         }
1900         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1901         if (err < 0)
1902                 return err;
1903
1904         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1905         if (err < 0)
1906                 return err;
1907
1908         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1909         if (err < 0)
1910                 return err;
1911
1912         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1913                                            hw->channels_min, hw->channels_max);
1914         if (err < 0)
1915                 return err;
1916
1917         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1918                                            hw->rate_min, hw->rate_max);
1919          if (err < 0)
1920                  return err;
1921
1922         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1923                                            hw->period_bytes_min, hw->period_bytes_max);
1924          if (err < 0)
1925                  return err;
1926
1927         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1928                                            hw->periods_min, hw->periods_max);
1929         if (err < 0)
1930                 return err;
1931
1932         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1933                                            hw->period_bytes_min, hw->buffer_bytes_max);
1934         if (err < 0)
1935                 return err;
1936
1937         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
1938                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1939                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1940         if (err < 0)
1941                 return err;
1942
1943         /* FIXME: remove */
1944         if (runtime->dma_bytes) {
1945                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1946                 if (err < 0)
1947                         return -EINVAL;
1948         }
1949
1950         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1951                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1952                                           snd_pcm_hw_rule_rate, hw,
1953                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1954                 if (err < 0)
1955                         return err;
1956         }
1957
1958         /* FIXME: this belong to lowlevel */
1959         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1960
1961         return 0;
1962 }
1963
1964 static void pcm_release_private(struct snd_pcm_substream *substream)
1965 {
1966         snd_pcm_unlink(substream);
1967 }
1968
1969 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1970 {
1971         substream->ref_count--;
1972         if (substream->ref_count > 0)
1973                 return;
1974
1975         snd_pcm_drop(substream);
1976         if (substream->hw_opened) {
1977                 if (substream->ops->hw_free != NULL)
1978                         substream->ops->hw_free(substream);
1979                 substream->ops->close(substream);
1980                 substream->hw_opened = 0;
1981         }
1982         if (substream->pcm_release) {
1983                 substream->pcm_release(substream);
1984                 substream->pcm_release = NULL;
1985         }
1986         snd_pcm_detach_substream(substream);
1987 }
1988
1989 EXPORT_SYMBOL(snd_pcm_release_substream);
1990
1991 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
1992                            struct file *file,
1993                            struct snd_pcm_substream **rsubstream)
1994 {
1995         struct snd_pcm_substream *substream;
1996         int err;
1997
1998         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
1999         if (err < 0)
2000                 return err;
2001         if (substream->ref_count > 1) {
2002                 *rsubstream = substream;
2003                 return 0;
2004         }
2005
2006         err = snd_pcm_hw_constraints_init(substream);
2007         if (err < 0) {
2008                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2009                 goto error;
2010         }
2011
2012         if ((err = substream->ops->open(substream)) < 0)
2013                 goto error;
2014
2015         substream->hw_opened = 1;
2016
2017         err = snd_pcm_hw_constraints_complete(substream);
2018         if (err < 0) {
2019                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2020                 goto error;
2021         }
2022
2023         *rsubstream = substream;
2024         return 0;
2025
2026  error:
2027         snd_pcm_release_substream(substream);
2028         return err;
2029 }
2030
2031 EXPORT_SYMBOL(snd_pcm_open_substream);
2032
2033 static int snd_pcm_open_file(struct file *file,
2034                              struct snd_pcm *pcm,
2035                              int stream,
2036                              struct snd_pcm_file **rpcm_file)
2037 {
2038         struct snd_pcm_file *pcm_file;
2039         struct snd_pcm_substream *substream;
2040         struct snd_pcm_str *str;
2041         int err;
2042
2043         if (rpcm_file)
2044                 *rpcm_file = NULL;
2045
2046         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2047         if (err < 0)
2048                 return err;
2049
2050         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2051         if (pcm_file == NULL) {
2052                 snd_pcm_release_substream(substream);
2053                 return -ENOMEM;
2054         }
2055         pcm_file->substream = substream;
2056         if (substream->ref_count == 1) {
2057                 str = substream->pstr;
2058                 substream->file = pcm_file;
2059                 substream->pcm_release = pcm_release_private;
2060         }
2061         file->private_data = pcm_file;
2062         if (rpcm_file)
2063                 *rpcm_file = pcm_file;
2064         return 0;
2065 }
2066
2067 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2068 {
2069         struct snd_pcm *pcm;
2070
2071         pcm = snd_lookup_minor_data(iminor(inode),
2072                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2073         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2074 }
2075
2076 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2077 {
2078         struct snd_pcm *pcm;
2079
2080         pcm = snd_lookup_minor_data(iminor(inode),
2081                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2082         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2083 }
2084
2085 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2086 {
2087         int err;
2088         struct snd_pcm_file *pcm_file;
2089         wait_queue_t wait;
2090
2091         if (pcm == NULL) {
2092                 err = -ENODEV;
2093                 goto __error1;
2094         }
2095         err = snd_card_file_add(pcm->card, file);
2096         if (err < 0)
2097                 goto __error1;
2098         if (!try_module_get(pcm->card->module)) {
2099                 err = -EFAULT;
2100                 goto __error2;
2101         }
2102         init_waitqueue_entry(&wait, current);
2103         add_wait_queue(&pcm->open_wait, &wait);
2104         mutex_lock(&pcm->open_mutex);
2105         while (1) {
2106                 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2107                 if (err >= 0)
2108                         break;
2109                 if (err == -EAGAIN) {
2110                         if (file->f_flags & O_NONBLOCK) {
2111                                 err = -EBUSY;
2112                                 break;
2113                         }
2114                 } else
2115                         break;
2116                 set_current_state(TASK_INTERRUPTIBLE);
2117                 mutex_unlock(&pcm->open_mutex);
2118                 schedule();
2119                 mutex_lock(&pcm->open_mutex);
2120                 if (signal_pending(current)) {
2121                         err = -ERESTARTSYS;
2122                         break;
2123                 }
2124         }
2125         remove_wait_queue(&pcm->open_wait, &wait);
2126         mutex_unlock(&pcm->open_mutex);
2127         if (err < 0)
2128                 goto __error;
2129         return err;
2130
2131       __error:
2132         module_put(pcm->card->module);
2133       __error2:
2134         snd_card_file_remove(pcm->card, file);
2135       __error1:
2136         return err;
2137 }
2138
2139 static int snd_pcm_release(struct inode *inode, struct file *file)
2140 {
2141         struct snd_pcm *pcm;
2142         struct snd_pcm_substream *substream;
2143         struct snd_pcm_file *pcm_file;
2144
2145         pcm_file = file->private_data;
2146         substream = pcm_file->substream;
2147         if (snd_BUG_ON(!substream))
2148                 return -ENXIO;
2149         pcm = substream->pcm;
2150         mutex_lock(&pcm->open_mutex);
2151         snd_pcm_release_substream(substream);
2152         kfree(pcm_file);
2153         mutex_unlock(&pcm->open_mutex);
2154         wake_up(&pcm->open_wait);
2155         module_put(pcm->card->module);
2156         snd_card_file_remove(pcm->card, file);
2157         return 0;
2158 }
2159
2160 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2161                                                  snd_pcm_uframes_t frames)
2162 {
2163         struct snd_pcm_runtime *runtime = substream->runtime;
2164         snd_pcm_sframes_t appl_ptr;
2165         snd_pcm_sframes_t ret;
2166         snd_pcm_sframes_t hw_avail;
2167
2168         if (frames == 0)
2169                 return 0;
2170
2171         snd_pcm_stream_lock_irq(substream);
2172         switch (runtime->status->state) {
2173         case SNDRV_PCM_STATE_PREPARED:
2174                 break;
2175         case SNDRV_PCM_STATE_DRAINING:
2176         case SNDRV_PCM_STATE_RUNNING:
2177                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2178                         break;
2179                 /* Fall through */
2180         case SNDRV_PCM_STATE_XRUN:
2181                 ret = -EPIPE;
2182                 goto __end;
2183         case SNDRV_PCM_STATE_SUSPENDED:
2184                 ret = -ESTRPIPE;
2185                 goto __end;
2186         default:
2187                 ret = -EBADFD;
2188                 goto __end;
2189         }
2190
2191         hw_avail = snd_pcm_playback_hw_avail(runtime);
2192         if (hw_avail <= 0) {
2193                 ret = 0;
2194                 goto __end;
2195         }
2196         if (frames > (snd_pcm_uframes_t)hw_avail)
2197                 frames = hw_avail;
2198         appl_ptr = runtime->control->appl_ptr - frames;
2199         if (appl_ptr < 0)
2200                 appl_ptr += runtime->boundary;
2201         runtime->control->appl_ptr = appl_ptr;
2202         ret = frames;
2203  __end:
2204         snd_pcm_stream_unlock_irq(substream);
2205         return ret;
2206 }
2207
2208 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2209                                                 snd_pcm_uframes_t frames)
2210 {
2211         struct snd_pcm_runtime *runtime = substream->runtime;
2212         snd_pcm_sframes_t appl_ptr;
2213         snd_pcm_sframes_t ret;
2214         snd_pcm_sframes_t hw_avail;
2215
2216         if (frames == 0)
2217                 return 0;
2218
2219         snd_pcm_stream_lock_irq(substream);
2220         switch (runtime->status->state) {
2221         case SNDRV_PCM_STATE_PREPARED:
2222         case SNDRV_PCM_STATE_DRAINING:
2223                 break;
2224         case SNDRV_PCM_STATE_RUNNING:
2225                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2226                         break;
2227                 /* Fall through */
2228         case SNDRV_PCM_STATE_XRUN:
2229                 ret = -EPIPE;
2230                 goto __end;
2231         case SNDRV_PCM_STATE_SUSPENDED:
2232                 ret = -ESTRPIPE;
2233                 goto __end;
2234         default:
2235                 ret = -EBADFD;
2236                 goto __end;
2237         }
2238
2239         hw_avail = snd_pcm_capture_hw_avail(runtime);
2240         if (hw_avail <= 0) {
2241                 ret = 0;
2242                 goto __end;
2243         }
2244         if (frames > (snd_pcm_uframes_t)hw_avail)
2245                 frames = hw_avail;
2246         appl_ptr = runtime->control->appl_ptr - frames;
2247         if (appl_ptr < 0)
2248                 appl_ptr += runtime->boundary;
2249         runtime->control->appl_ptr = appl_ptr;
2250         ret = frames;
2251  __end:
2252         snd_pcm_stream_unlock_irq(substream);
2253         return ret;
2254 }
2255
2256 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2257                                                   snd_pcm_uframes_t frames)
2258 {
2259         struct snd_pcm_runtime *runtime = substream->runtime;
2260         snd_pcm_sframes_t appl_ptr;
2261         snd_pcm_sframes_t ret;
2262         snd_pcm_sframes_t avail;
2263
2264         if (frames == 0)
2265                 return 0;
2266
2267         snd_pcm_stream_lock_irq(substream);
2268         switch (runtime->status->state) {
2269         case SNDRV_PCM_STATE_PREPARED:
2270         case SNDRV_PCM_STATE_PAUSED:
2271                 break;
2272         case SNDRV_PCM_STATE_DRAINING:
2273         case SNDRV_PCM_STATE_RUNNING:
2274                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2275                         break;
2276                 /* Fall through */
2277         case SNDRV_PCM_STATE_XRUN:
2278                 ret = -EPIPE;
2279                 goto __end;
2280         case SNDRV_PCM_STATE_SUSPENDED:
2281                 ret = -ESTRPIPE;
2282                 goto __end;
2283         default:
2284                 ret = -EBADFD;
2285                 goto __end;
2286         }
2287
2288         avail = snd_pcm_playback_avail(runtime);
2289         if (avail <= 0) {
2290                 ret = 0;
2291                 goto __end;
2292         }
2293         if (frames > (snd_pcm_uframes_t)avail)
2294                 frames = avail;
2295         appl_ptr = runtime->control->appl_ptr + frames;
2296         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2297                 appl_ptr -= runtime->boundary;
2298         runtime->control->appl_ptr = appl_ptr;
2299         ret = frames;
2300  __end:
2301         snd_pcm_stream_unlock_irq(substream);
2302         return ret;
2303 }
2304
2305 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2306                                                  snd_pcm_uframes_t frames)
2307 {
2308         struct snd_pcm_runtime *runtime = substream->runtime;
2309         snd_pcm_sframes_t appl_ptr;
2310         snd_pcm_sframes_t ret;
2311         snd_pcm_sframes_t avail;
2312
2313         if (frames == 0)
2314                 return 0;
2315
2316         snd_pcm_stream_lock_irq(substream);
2317         switch (runtime->status->state) {
2318         case SNDRV_PCM_STATE_PREPARED:
2319         case SNDRV_PCM_STATE_DRAINING:
2320         case SNDRV_PCM_STATE_PAUSED:
2321                 break;
2322         case SNDRV_PCM_STATE_RUNNING:
2323                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2324                         break;
2325                 /* Fall through */
2326         case SNDRV_PCM_STATE_XRUN:
2327                 ret = -EPIPE;
2328                 goto __end;
2329         case SNDRV_PCM_STATE_SUSPENDED:
2330                 ret = -ESTRPIPE;
2331                 goto __end;
2332         default:
2333                 ret = -EBADFD;
2334                 goto __end;
2335         }
2336
2337         avail = snd_pcm_capture_avail(runtime);
2338         if (avail <= 0) {
2339                 ret = 0;
2340                 goto __end;
2341         }
2342         if (frames > (snd_pcm_uframes_t)avail)
2343                 frames = avail;
2344         appl_ptr = runtime->control->appl_ptr + frames;
2345         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2346                 appl_ptr -= runtime->boundary;
2347         runtime->control->appl_ptr = appl_ptr;
2348         ret = frames;
2349  __end:
2350         snd_pcm_stream_unlock_irq(substream);
2351         return ret;
2352 }
2353
2354 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2355 {
2356         struct snd_pcm_runtime *runtime = substream->runtime;
2357         int err;
2358
2359         snd_pcm_stream_lock_irq(substream);
2360         switch (runtime->status->state) {
2361         case SNDRV_PCM_STATE_DRAINING:
2362                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2363                         goto __badfd;
2364         case SNDRV_PCM_STATE_RUNNING:
2365                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2366                         break;
2367                 /* Fall through */
2368         case SNDRV_PCM_STATE_PREPARED:
2369         case SNDRV_PCM_STATE_SUSPENDED:
2370                 err = 0;
2371                 break;
2372         case SNDRV_PCM_STATE_XRUN:
2373                 err = -EPIPE;
2374                 break;
2375         default:
2376               __badfd:
2377                 err = -EBADFD;
2378                 break;
2379         }
2380         snd_pcm_stream_unlock_irq(substream);
2381         return err;
2382 }
2383                 
2384 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2385                          snd_pcm_sframes_t __user *res)
2386 {
2387         struct snd_pcm_runtime *runtime = substream->runtime;
2388         int err;
2389         snd_pcm_sframes_t n = 0;
2390
2391         snd_pcm_stream_lock_irq(substream);
2392         switch (runtime->status->state) {
2393         case SNDRV_PCM_STATE_DRAINING:
2394                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2395                         goto __badfd;
2396         case SNDRV_PCM_STATE_RUNNING:
2397                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2398                         break;
2399                 /* Fall through */
2400         case SNDRV_PCM_STATE_PREPARED:
2401         case SNDRV_PCM_STATE_SUSPENDED:
2402                 err = 0;
2403                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2404                         n = snd_pcm_playback_hw_avail(runtime);
2405                 else
2406                         n = snd_pcm_capture_avail(runtime);
2407                 n += runtime->delay;
2408                 break;
2409         case SNDRV_PCM_STATE_XRUN:
2410                 err = -EPIPE;
2411                 break;
2412         default:
2413               __badfd:
2414                 err = -EBADFD;
2415                 break;
2416         }
2417         snd_pcm_stream_unlock_irq(substream);
2418         if (!err)
2419                 if (put_user(n, res))
2420                         err = -EFAULT;
2421         return err;
2422 }
2423                 
2424 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2425                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2426 {
2427         struct snd_pcm_runtime *runtime = substream->runtime;
2428         struct snd_pcm_sync_ptr sync_ptr;
2429         volatile struct snd_pcm_mmap_status *status;
2430         volatile struct snd_pcm_mmap_control *control;
2431         int err;
2432
2433         memset(&sync_ptr, 0, sizeof(sync_ptr));
2434         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2435                 return -EFAULT;
2436         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2437                 return -EFAULT; 
2438         status = runtime->status;
2439         control = runtime->control;
2440         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2441                 err = snd_pcm_hwsync(substream);
2442                 if (err < 0)
2443                         return err;
2444         }
2445         snd_pcm_stream_lock_irq(substream);
2446         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2447                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2448         else
2449                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2450         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2451                 control->avail_min = sync_ptr.c.control.avail_min;
2452         else
2453                 sync_ptr.c.control.avail_min = control->avail_min;
2454         sync_ptr.s.status.state = status->state;
2455         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2456         sync_ptr.s.status.tstamp = status->tstamp;
2457         sync_ptr.s.status.suspended_state = status->suspended_state;
2458         snd_pcm_stream_unlock_irq(substream);
2459         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2460                 return -EFAULT;
2461         return 0;
2462 }
2463
2464 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2465 {
2466         struct snd_pcm_runtime *runtime = substream->runtime;
2467         int arg;
2468         
2469         if (get_user(arg, _arg))
2470                 return -EFAULT;
2471         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2472                 return -EINVAL;
2473         runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2474         if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2475                 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2476         return 0;
2477 }
2478                 
2479 static int snd_pcm_common_ioctl1(struct file *file,
2480                                  struct snd_pcm_substream *substream,
2481                                  unsigned int cmd, void __user *arg)
2482 {
2483         switch (cmd) {
2484         case SNDRV_PCM_IOCTL_PVERSION:
2485                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2486         case SNDRV_PCM_IOCTL_INFO:
2487                 return snd_pcm_info_user(substream, arg);
2488         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2489                 return 0;
2490         case SNDRV_PCM_IOCTL_TTSTAMP:
2491                 return snd_pcm_tstamp(substream, arg);
2492         case SNDRV_PCM_IOCTL_HW_REFINE:
2493                 return snd_pcm_hw_refine_user(substream, arg);
2494         case SNDRV_PCM_IOCTL_HW_PARAMS:
2495                 return snd_pcm_hw_params_user(substream, arg);
2496         case SNDRV_PCM_IOCTL_HW_FREE:
2497                 return snd_pcm_hw_free(substream);
2498         case SNDRV_PCM_IOCTL_SW_PARAMS:
2499                 return snd_pcm_sw_params_user(substream, arg);
2500         case SNDRV_PCM_IOCTL_STATUS:
2501                 return snd_pcm_status_user(substream, arg);
2502         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2503                 return snd_pcm_channel_info_user(substream, arg);
2504         case SNDRV_PCM_IOCTL_PREPARE:
2505                 return snd_pcm_prepare(substream, file);
2506         case SNDRV_PCM_IOCTL_RESET:
2507                 return snd_pcm_reset(substream);
2508         case SNDRV_PCM_IOCTL_START:
2509                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2510         case SNDRV_PCM_IOCTL_LINK:
2511                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2512         case SNDRV_PCM_IOCTL_UNLINK:
2513                 return snd_pcm_unlink(substream);
2514         case SNDRV_PCM_IOCTL_RESUME:
2515                 return snd_pcm_resume(substream);
2516         case SNDRV_PCM_IOCTL_XRUN:
2517                 return snd_pcm_xrun(substream);
2518         case SNDRV_PCM_IOCTL_HWSYNC:
2519                 return snd_pcm_hwsync(substream);
2520         case SNDRV_PCM_IOCTL_DELAY:
2521                 return snd_pcm_delay(substream, arg);
2522         case SNDRV_PCM_IOCTL_SYNC_PTR:
2523                 return snd_pcm_sync_ptr(substream, arg);
2524 #ifdef CONFIG_SND_SUPPORT_OLD_API
2525         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2526                 return snd_pcm_hw_refine_old_user(substream, arg);
2527         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2528                 return snd_pcm_hw_params_old_user(substream, arg);
2529 #endif
2530         case SNDRV_PCM_IOCTL_DRAIN:
2531                 return snd_pcm_drain(substream, file);
2532         case SNDRV_PCM_IOCTL_DROP:
2533                 return snd_pcm_drop(substream);
2534         case SNDRV_PCM_IOCTL_PAUSE:
2535         {
2536                 int res;
2537                 snd_pcm_stream_lock_irq(substream);
2538                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2539                 snd_pcm_stream_unlock_irq(substream);
2540                 return res;
2541         }
2542         }
2543         snd_printd("unknown ioctl = 0x%x\n", cmd);
2544         return -ENOTTY;
2545 }
2546
2547 static int snd_pcm_playback_ioctl1(struct file *file,
2548                                    struct snd_pcm_substream *substream,
2549                                    unsigned int cmd, void __user *arg)
2550 {
2551         if (snd_BUG_ON(!substream))
2552                 return -ENXIO;
2553         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2554                 return -EINVAL;
2555         switch (cmd) {
2556         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2557         {
2558                 struct snd_xferi xferi;
2559                 struct snd_xferi __user *_xferi = arg;
2560                 struct snd_pcm_runtime *runtime = substream->runtime;
2561                 snd_pcm_sframes_t result;
2562                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2563                         return -EBADFD;
2564                 if (put_user(0, &_xferi->result))
2565                         return -EFAULT;
2566                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2567                         return -EFAULT;
2568                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2569                 __put_user(result, &_xferi->result);
2570                 return result < 0 ? result : 0;
2571         }
2572         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2573         {
2574                 struct snd_xfern xfern;
2575                 struct snd_xfern __user *_xfern = arg;
2576                 struct snd_pcm_runtime *runtime = substream->runtime;
2577                 void __user **bufs;
2578                 snd_pcm_sframes_t result;
2579                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2580                         return -EBADFD;
2581                 if (runtime->channels > 128)
2582                         return -EINVAL;
2583                 if (put_user(0, &_xfern->result))
2584                         return -EFAULT;
2585                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2586                         return -EFAULT;
2587
2588                 bufs = memdup_user(xfern.bufs,
2589                                    sizeof(void *) * runtime->channels);
2590                 if (IS_ERR(bufs))
2591                         return PTR_ERR(bufs);
2592                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2593                 kfree(bufs);
2594                 __put_user(result, &_xfern->result);
2595                 return result < 0 ? result : 0;
2596         }
2597         case SNDRV_PCM_IOCTL_REWIND:
2598         {
2599                 snd_pcm_uframes_t frames;
2600                 snd_pcm_uframes_t __user *_frames = arg;
2601                 snd_pcm_sframes_t result;
2602                 if (get_user(frames, _frames))
2603                         return -EFAULT;
2604                 if (put_user(0, _frames))
2605                         return -EFAULT;
2606                 result = snd_pcm_playback_rewind(substream, frames);
2607                 __put_user(result, _frames);
2608                 return result < 0 ? result : 0;
2609         }
2610         case SNDRV_PCM_IOCTL_FORWARD:
2611         {
2612                 snd_pcm_uframes_t frames;
2613                 snd_pcm_uframes_t __user *_frames = arg;
2614                 snd_pcm_sframes_t result;
2615                 if (get_user(frames, _frames))
2616                         return -EFAULT;
2617                 if (put_user(0, _frames))
2618                         return -EFAULT;
2619                 result = snd_pcm_playback_forward(substream, frames);
2620                 __put_user(result, _frames);
2621                 return result < 0 ? result : 0;
2622         }
2623         }
2624         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2625 }
2626
2627 static int snd_pcm_capture_ioctl1(struct file *file,
2628                                   struct snd_pcm_substream *substream,
2629                                   unsigned int cmd, void __user *arg)
2630 {
2631         if (snd_BUG_ON(!substream))
2632                 return -ENXIO;
2633         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2634                 return -EINVAL;
2635         switch (cmd) {
2636         case SNDRV_PCM_IOCTL_READI_FRAMES:
2637         {
2638                 struct snd_xferi xferi;
2639                 struct snd_xferi __user *_xferi = arg;
2640                 struct snd_pcm_runtime *runtime = substream->runtime;
2641                 snd_pcm_sframes_t result;
2642                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2643                         return -EBADFD;
2644                 if (put_user(0, &_xferi->result))
2645                         return -EFAULT;
2646                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2647                         return -EFAULT;
2648                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2649                 __put_user(result, &_xferi->result);
2650                 return result < 0 ? result : 0;
2651         }
2652         case SNDRV_PCM_IOCTL_READN_FRAMES:
2653         {
2654                 struct snd_xfern xfern;
2655                 struct snd_xfern __user *_xfern = arg;
2656                 struct snd_pcm_runtime *runtime = substream->runtime;
2657                 void *bufs;
2658                 snd_pcm_sframes_t result;
2659                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2660                         return -EBADFD;
2661                 if (runtime->channels > 128)
2662                         return -EINVAL;
2663                 if (put_user(0, &_xfern->result))
2664                         return -EFAULT;
2665                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2666                         return -EFAULT;
2667
2668                 bufs = memdup_user(xfern.bufs,
2669                                    sizeof(void *) * runtime->channels);
2670                 if (IS_ERR(bufs))
2671                         return PTR_ERR(bufs);
2672                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2673                 kfree(bufs);
2674                 __put_user(result, &_xfern->result);
2675                 return result < 0 ? result : 0;
2676         }
2677         case SNDRV_PCM_IOCTL_REWIND:
2678         {
2679                 snd_pcm_uframes_t frames;
2680                 snd_pcm_uframes_t __user *_frames = arg;
2681                 snd_pcm_sframes_t result;
2682                 if (get_user(frames, _frames))
2683                         return -EFAULT;
2684                 if (put_user(0, _frames))
2685                         return -EFAULT;
2686                 result = snd_pcm_capture_rewind(substream, frames);
2687                 __put_user(result, _frames);
2688                 return result < 0 ? result : 0;
2689         }
2690         case SNDRV_PCM_IOCTL_FORWARD:
2691         {
2692                 snd_pcm_uframes_t frames;
2693                 snd_pcm_uframes_t __user *_frames = arg;
2694                 snd_pcm_sframes_t result;
2695                 if (get_user(frames, _frames))
2696                         return -EFAULT;
2697                 if (put_user(0, _frames))
2698                         return -EFAULT;
2699                 result = snd_pcm_capture_forward(substream, frames);
2700                 __put_user(result, _frames);
2701                 return result < 0 ? result : 0;
2702         }
2703         }
2704         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2705 }
2706
2707 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2708                                    unsigned long arg)
2709 {
2710         struct snd_pcm_file *pcm_file;
2711
2712         pcm_file = file->private_data;
2713
2714         if (((cmd >> 8) & 0xff) != 'A')
2715                 return -ENOTTY;
2716
2717         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2718                                        (void __user *)arg);
2719 }
2720
2721 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2722                                   unsigned long arg)
2723 {
2724         struct snd_pcm_file *pcm_file;
2725
2726         pcm_file = file->private_data;
2727
2728         if (((cmd >> 8) & 0xff) != 'A')
2729                 return -ENOTTY;
2730
2731         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2732                                       (void __user *)arg);
2733 }
2734
2735 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2736                          unsigned int cmd, void *arg)
2737 {
2738         mm_segment_t fs;
2739         int result;
2740         
2741         fs = snd_enter_user();
2742         switch (substream->stream) {
2743         case SNDRV_PCM_STREAM_PLAYBACK:
2744                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2745                                                  (void __user *)arg);
2746                 break;
2747         case SNDRV_PCM_STREAM_CAPTURE:
2748                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2749                                                 (void __user *)arg);
2750                 break;
2751         default:
2752                 result = -EINVAL;
2753                 break;
2754         }
2755         snd_leave_user(fs);
2756         return result;
2757 }
2758
2759 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2760
2761 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2762                             loff_t * offset)
2763 {
2764         struct snd_pcm_file *pcm_file;
2765         struct snd_pcm_substream *substream;
2766         struct snd_pcm_runtime *runtime;
2767         snd_pcm_sframes_t result;
2768
2769         pcm_file = file->private_data;
2770         substream = pcm_file->substream;
2771         if (PCM_RUNTIME_CHECK(substream))
2772                 return -ENXIO;
2773         runtime = substream->runtime;
2774         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2775                 return -EBADFD;
2776         if (!frame_aligned(runtime, count))
2777                 return -EINVAL;
2778         count = bytes_to_frames(runtime, count);
2779         result = snd_pcm_lib_read(substream, buf, count);
2780         if (result > 0)
2781                 result = frames_to_bytes(runtime, result);
2782         return result;
2783 }
2784
2785 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2786                              size_t count, loff_t * offset)
2787 {
2788         struct snd_pcm_file *pcm_file;
2789         struct snd_pcm_substream *substream;
2790         struct snd_pcm_runtime *runtime;
2791         snd_pcm_sframes_t result;
2792
2793         pcm_file = file->private_data;
2794         substream = pcm_file->substream;
2795         if (PCM_RUNTIME_CHECK(substream))
2796                 return -ENXIO;
2797         runtime = substream->runtime;
2798         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2799                 return -EBADFD;
2800         if (!frame_aligned(runtime, count))
2801                 return -EINVAL;
2802         count = bytes_to_frames(runtime, count);
2803         result = snd_pcm_lib_write(substream, buf, count);
2804         if (result > 0)
2805                 result = frames_to_bytes(runtime, result);
2806         return result;
2807 }
2808
2809 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2810                              unsigned long nr_segs, loff_t pos)
2811
2812 {
2813         struct snd_pcm_file *pcm_file;
2814         struct snd_pcm_substream *substream;
2815         struct snd_pcm_runtime *runtime;
2816         snd_pcm_sframes_t result;
2817         unsigned long i;
2818         void __user **bufs;
2819         snd_pcm_uframes_t frames;
2820
2821         pcm_file = iocb->ki_filp->private_data;
2822         substream = pcm_file->substream;
2823         if (PCM_RUNTIME_CHECK(substream))
2824                 return -ENXIO;
2825         runtime = substream->runtime;
2826         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2827                 return -EBADFD;
2828         if (nr_segs > 1024 || nr_segs != runtime->channels)
2829                 return -EINVAL;
2830         if (!frame_aligned(runtime, iov->iov_len))
2831                 return -EINVAL;
2832         frames = bytes_to_samples(runtime, iov->iov_len);
2833         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2834         if (bufs == NULL)
2835                 return -ENOMEM;
2836         for (i = 0; i < nr_segs; ++i)
2837                 bufs[i] = iov[i].iov_base;
2838         result = snd_pcm_lib_readv(substream, bufs, frames);
2839         if (result > 0)
2840                 result = frames_to_bytes(runtime, result);
2841         kfree(bufs);
2842         return result;
2843 }
2844
2845 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2846                               unsigned long nr_segs, loff_t pos)
2847 {
2848         struct snd_pcm_file *pcm_file;
2849         struct snd_pcm_substream *substream;
2850         struct snd_pcm_runtime *runtime;
2851         snd_pcm_sframes_t result;
2852         unsigned long i;
2853         void __user **bufs;
2854         snd_pcm_uframes_t frames;
2855
2856         pcm_file = iocb->ki_filp->private_data;
2857         substream = pcm_file->substream;
2858         if (PCM_RUNTIME_CHECK(substream))
2859                 return -ENXIO;
2860         runtime = substream->runtime;
2861         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2862                 return -EBADFD;
2863         if (nr_segs > 128 || nr_segs != runtime->channels ||
2864             !frame_aligned(runtime, iov->iov_len))
2865                 return -EINVAL;
2866         frames = bytes_to_samples(runtime, iov->iov_len);
2867         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2868         if (bufs == NULL)
2869                 return -ENOMEM;
2870         for (i = 0; i < nr_segs; ++i)
2871                 bufs[i] = iov[i].iov_base;
2872         result = snd_pcm_lib_writev(substream, bufs, frames);
2873         if (result > 0)
2874                 result = frames_to_bytes(runtime, result);
2875         kfree(bufs);
2876         return result;
2877 }
2878
2879 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2880 {
2881         struct snd_pcm_file *pcm_file;
2882         struct snd_pcm_substream *substream;
2883         struct snd_pcm_runtime *runtime;
2884         unsigned int mask;
2885         snd_pcm_uframes_t avail;
2886
2887         pcm_file = file->private_data;
2888
2889         substream = pcm_file->substream;
2890         if (PCM_RUNTIME_CHECK(substream))
2891                 return -ENXIO;
2892         runtime = substream->runtime;
2893
2894         poll_wait(file, &runtime->sleep, wait);
2895
2896         snd_pcm_stream_lock_irq(substream);
2897         avail = snd_pcm_playback_avail(runtime);
2898         switch (runtime->status->state) {
2899         case SNDRV_PCM_STATE_RUNNING:
2900         case SNDRV_PCM_STATE_PREPARED:
2901         case SNDRV_PCM_STATE_PAUSED:
2902                 if (avail >= runtime->control->avail_min) {
2903                         mask = POLLOUT | POLLWRNORM;
2904                         break;
2905                 }
2906                 /* Fall through */
2907         case SNDRV_PCM_STATE_DRAINING:
2908                 mask = 0;
2909                 break;
2910         default:
2911                 mask = POLLOUT | POLLWRNORM | POLLERR;
2912                 break;
2913         }
2914         snd_pcm_stream_unlock_irq(substream);
2915         return mask;
2916 }
2917
2918 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2919 {
2920         struct snd_pcm_file *pcm_file;
2921         struct snd_pcm_substream *substream;
2922         struct snd_pcm_runtime *runtime;
2923         unsigned int mask;
2924         snd_pcm_uframes_t avail;
2925
2926         pcm_file = file->private_data;
2927
2928         substream = pcm_file->substream;
2929         if (PCM_RUNTIME_CHECK(substream))
2930                 return -ENXIO;
2931         runtime = substream->runtime;
2932
2933         poll_wait(file, &runtime->sleep, wait);
2934
2935         snd_pcm_stream_lock_irq(substream);
2936         avail = snd_pcm_capture_avail(runtime);
2937         switch (runtime->status->state) {
2938         case SNDRV_PCM_STATE_RUNNING:
2939         case SNDRV_PCM_STATE_PREPARED:
2940         case SNDRV_PCM_STATE_PAUSED:
2941                 if (avail >= runtime->control->avail_min) {
2942                         mask = POLLIN | POLLRDNORM;
2943                         break;
2944                 }
2945                 mask = 0;
2946                 break;
2947         case SNDRV_PCM_STATE_DRAINING:
2948                 if (avail > 0) {
2949                         mask = POLLIN | POLLRDNORM;
2950                         break;
2951                 }
2952                 /* Fall through */
2953         default:
2954                 mask = POLLIN | POLLRDNORM | POLLERR;
2955                 break;
2956         }
2957         snd_pcm_stream_unlock_irq(substream);
2958         return mask;
2959 }
2960
2961 /*
2962  * mmap support
2963  */
2964
2965 /*
2966  * Only on coherent architectures, we can mmap the status and the control records
2967  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
2968  */
2969 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2970 /*
2971  * mmap status record
2972  */
2973 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2974                                                 struct vm_fault *vmf)
2975 {
2976         struct snd_pcm_substream *substream = area->vm_private_data;
2977         struct snd_pcm_runtime *runtime;
2978         
2979         if (substream == NULL)
2980                 return VM_FAULT_SIGBUS;
2981         runtime = substream->runtime;
2982         vmf->page = virt_to_page(runtime->status);
2983         get_page(vmf->page);
2984         return 0;
2985 }
2986
2987 static const struct vm_operations_struct snd_pcm_vm_ops_status =
2988 {
2989         .fault =        snd_pcm_mmap_status_fault,
2990 };
2991
2992 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
2993                                struct vm_area_struct *area)
2994 {
2995         struct snd_pcm_runtime *runtime;
2996         long size;
2997         if (!(area->vm_flags & VM_READ))
2998                 return -EINVAL;
2999         runtime = substream->runtime;
3000         size = area->vm_end - area->vm_start;
3001         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3002                 return -EINVAL;
3003         area->vm_ops = &snd_pcm_vm_ops_status;
3004         area->vm_private_data = substream;
3005         area->vm_flags |= VM_RESERVED;
3006         return 0;
3007 }
3008
3009 /*
3010  * mmap control record
3011  */
3012 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3013                                                 struct vm_fault *vmf)
3014 {
3015         struct snd_pcm_substream *substream = area->vm_private_data;
3016         struct snd_pcm_runtime *runtime;
3017         
3018         if (substream == NULL)
3019                 return VM_FAULT_SIGBUS;
3020         runtime = substream->runtime;
3021         vmf->page = virt_to_page(runtime->control);
3022         get_page(vmf->page);
3023         return 0;
3024 }
3025
3026 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3027 {
3028         .fault =        snd_pcm_mmap_control_fault,
3029 };
3030
3031 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3032                                 struct vm_area_struct *area)
3033 {
3034         struct snd_pcm_runtime *runtime;
3035         long size;
3036         if (!(area->vm_flags & VM_READ))
3037                 return -EINVAL;
3038         runtime = substream->runtime;
3039         size = area->vm_end - area->vm_start;
3040         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3041                 return -EINVAL;
3042         area->vm_ops = &snd_pcm_vm_ops_control;
3043         area->vm_private_data = substream;
3044         area->vm_flags |= VM_RESERVED;
3045         return 0;
3046 }
3047 #else /* ! coherent mmap */
3048 /*
3049  * don't support mmap for status and control records.
3050  */
3051 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3052                                struct vm_area_struct *area)
3053 {
3054         return -ENXIO;
3055 }
3056 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3057                                 struct vm_area_struct *area)
3058 {
3059         return -ENXIO;
3060 }
3061 #endif /* coherent mmap */
3062
3063 static inline struct page *
3064 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3065 {
3066         void *vaddr = substream->runtime->dma_area + ofs;
3067 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3068         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3069                 return virt_to_page(CAC_ADDR(vaddr));
3070 #endif
3071 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3072         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3073                 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3074                 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3075                 /* assume dma_handle set via pfn_to_phys() in
3076                  * mm/dma-noncoherent.c
3077                  */
3078                 return pfn_to_page(addr >> PAGE_SHIFT);
3079         }
3080 #endif
3081         return virt_to_page(vaddr);
3082 }
3083
3084 /*
3085  * fault callback for mmapping a RAM page
3086  */
3087 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3088                                                 struct vm_fault *vmf)
3089 {
3090         struct snd_pcm_substream *substream = area->vm_private_data;
3091         struct snd_pcm_runtime *runtime;
3092         unsigned long offset;
3093         struct page * page;
3094         size_t dma_bytes;
3095         
3096         if (substream == NULL)
3097                 return VM_FAULT_SIGBUS;
3098         runtime = substream->runtime;
3099         offset = vmf->pgoff << PAGE_SHIFT;
3100         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3101         if (offset > dma_bytes - PAGE_SIZE)
3102                 return VM_FAULT_SIGBUS;
3103         if (substream->ops->page)
3104                 page = substream->ops->page(substream, offset);
3105         else
3106                 page = snd_pcm_default_page_ops(substream, offset);
3107         if (!page)
3108                 return VM_FAULT_SIGBUS;
3109         get_page(page);
3110         vmf->page = page;
3111         return 0;
3112 }
3113
3114 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3115         .open =         snd_pcm_mmap_data_open,
3116         .close =        snd_pcm_mmap_data_close,
3117 };
3118
3119 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3120         .open =         snd_pcm_mmap_data_open,
3121         .close =        snd_pcm_mmap_data_close,
3122         .fault =        snd_pcm_mmap_data_fault,
3123 };
3124
3125 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3126 /* This should be defined / handled globally! */
3127 #ifdef CONFIG_ARM
3128 #define ARCH_HAS_DMA_MMAP_COHERENT
3129 #endif
3130 #endif
3131
3132 /*
3133  * mmap the DMA buffer on RAM
3134  */
3135 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3136                                 struct vm_area_struct *area)
3137 {
3138         area->vm_flags |= VM_RESERVED;
3139 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3140         if (!substream->ops->page &&
3141             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3142                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3143                                          area,
3144                                          substream->runtime->dma_area,
3145                                          substream->runtime->dma_addr,
3146                                          area->vm_end - area->vm_start);
3147 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3148         /* mmap with fault handler */
3149         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3150         return 0;
3151 }
3152
3153 /*
3154  * mmap the DMA buffer on I/O memory area
3155  */
3156 #if SNDRV_PCM_INFO_MMAP_IOMEM
3157 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3158                            struct vm_area_struct *area)
3159 {
3160         long size;
3161         unsigned long offset;
3162
3163 #ifdef pgprot_noncached
3164         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3165 #endif
3166         area->vm_flags |= VM_IO;
3167         size = area->vm_end - area->vm_start;
3168         offset = area->vm_pgoff << PAGE_SHIFT;
3169         if (io_remap_pfn_range(area, area->vm_start,
3170                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3171                                 size, area->vm_page_prot))
3172                 return -EAGAIN;
3173         return 0;
3174 }
3175
3176 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3177 #endif /* SNDRV_PCM_INFO_MMAP */
3178
3179 /*
3180  * mmap DMA buffer
3181  */
3182 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3183                       struct vm_area_struct *area)
3184 {
3185         struct snd_pcm_runtime *runtime;
3186         long size;
3187         unsigned long offset;
3188         size_t dma_bytes;
3189         int err;
3190
3191         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3192                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3193                         return -EINVAL;
3194         } else {
3195                 if (!(area->vm_flags & VM_READ))
3196                         return -EINVAL;
3197         }
3198         runtime = substream->runtime;
3199         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3200                 return -EBADFD;
3201         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3202                 return -ENXIO;
3203         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3204             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3205                 return -EINVAL;
3206         size = area->vm_end - area->vm_start;
3207         offset = area->vm_pgoff << PAGE_SHIFT;
3208         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3209         if ((size_t)size > dma_bytes)
3210                 return -EINVAL;
3211         if (offset > dma_bytes - size)
3212                 return -EINVAL;
3213
3214         area->vm_ops = &snd_pcm_vm_ops_data;
3215         area->vm_private_data = substream;
3216         if (substream->ops->mmap)
3217                 err = substream->ops->mmap(substream, area);
3218         else
3219                 err = snd_pcm_default_mmap(substream, area);
3220         if (!err)
3221                 atomic_inc(&substream->mmap_count);
3222         return err;
3223 }
3224
3225 EXPORT_SYMBOL(snd_pcm_mmap_data);
3226
3227 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3228 {
3229         struct snd_pcm_file * pcm_file;
3230         struct snd_pcm_substream *substream;    
3231         unsigned long offset;
3232         
3233         pcm_file = file->private_data;
3234         substream = pcm_file->substream;
3235         if (PCM_RUNTIME_CHECK(substream))
3236                 return -ENXIO;
3237
3238         offset = area->vm_pgoff << PAGE_SHIFT;
3239         switch (offset) {
3240         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3241                 if (pcm_file->no_compat_mmap)
3242                         return -ENXIO;
3243                 return snd_pcm_mmap_status(substream, file, area);
3244         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3245                 if (pcm_file->no_compat_mmap)
3246                         return -ENXIO;
3247                 return snd_pcm_mmap_control(substream, file, area);
3248         default:
3249                 return snd_pcm_mmap_data(substream, file, area);
3250         }
3251         return 0;
3252 }
3253
3254 static int snd_pcm_fasync(int fd, struct file * file, int on)
3255 {
3256         struct snd_pcm_file * pcm_file;
3257         struct snd_pcm_substream *substream;
3258         struct snd_pcm_runtime *runtime;
3259         int err = -ENXIO;
3260
3261         lock_kernel();
3262         pcm_file = file->private_data;
3263         substream = pcm_file->substream;
3264         if (PCM_RUNTIME_CHECK(substream))
3265                 goto out;
3266         runtime = substream->runtime;
3267         err = fasync_helper(fd, file, on, &runtime->fasync);
3268 out:
3269         unlock_kernel();
3270         return err;
3271 }
3272
3273 /*
3274  * ioctl32 compat
3275  */
3276 #ifdef CONFIG_COMPAT
3277 #include "pcm_compat.c"
3278 #else
3279 #define snd_pcm_ioctl_compat    NULL
3280 #endif
3281
3282 /*
3283  *  To be removed helpers to keep binary compatibility
3284  */
3285
3286 #ifdef CONFIG_SND_SUPPORT_OLD_API
3287 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3288 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3289
3290 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3291                                                struct snd_pcm_hw_params_old *oparams)
3292 {
3293         unsigned int i;
3294
3295         memset(params, 0, sizeof(*params));
3296         params->flags = oparams->flags;
3297         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3298                 params->masks[i].bits[0] = oparams->masks[i];
3299         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3300         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3301         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3302         params->info = oparams->info;
3303         params->msbits = oparams->msbits;
3304         params->rate_num = oparams->rate_num;
3305         params->rate_den = oparams->rate_den;
3306         params->fifo_size = oparams->fifo_size;
3307 }
3308
3309 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3310                                              struct snd_pcm_hw_params *params)
3311 {
3312         unsigned int i;
3313
3314         memset(oparams, 0, sizeof(*oparams));
3315         oparams->flags = params->flags;
3316         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3317                 oparams->masks[i] = params->masks[i].bits[0];
3318         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3319         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3320         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3321         oparams->info = params->info;
3322         oparams->msbits = params->msbits;
3323         oparams->rate_num = params->rate_num;
3324         oparams->rate_den = params->rate_den;
3325         oparams->fifo_size = params->fifo_size;
3326 }
3327
3328 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3329                                       struct snd_pcm_hw_params_old __user * _oparams)
3330 {
3331         struct snd_pcm_hw_params *params;
3332         struct snd_pcm_hw_params_old *oparams = NULL;
3333         int err;
3334
3335         params = kmalloc(sizeof(*params), GFP_KERNEL);
3336         if (!params)
3337                 return -ENOMEM;
3338
3339         oparams = memdup_user(_oparams, sizeof(*oparams));
3340         if (IS_ERR(oparams)) {
3341                 err = PTR_ERR(oparams);
3342                 goto out;
3343         }
3344         snd_pcm_hw_convert_from_old_params(params, oparams);
3345         err = snd_pcm_hw_refine(substream, params);
3346         snd_pcm_hw_convert_to_old_params(oparams, params);
3347         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3348                 if (!err)
3349                         err = -EFAULT;
3350         }
3351
3352         kfree(oparams);
3353 out:
3354         kfree(params);
3355         return err;
3356 }
3357
3358 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3359                                       struct snd_pcm_hw_params_old __user * _oparams)
3360 {
3361         struct snd_pcm_hw_params *params;
3362         struct snd_pcm_hw_params_old *oparams = NULL;
3363         int err;
3364
3365         params = kmalloc(sizeof(*params), GFP_KERNEL);
3366         if (!params)
3367                 return -ENOMEM;
3368
3369         oparams = memdup_user(_oparams, sizeof(*oparams));
3370         if (IS_ERR(oparams)) {
3371                 err = PTR_ERR(oparams);
3372                 goto out;
3373         }
3374         snd_pcm_hw_convert_from_old_params(params, oparams);
3375         err = snd_pcm_hw_params(substream, params);
3376         snd_pcm_hw_convert_to_old_params(oparams, params);
3377         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3378                 if (!err)
3379                         err = -EFAULT;
3380         }
3381
3382         kfree(oparams);
3383 out:
3384         kfree(params);
3385         return err;
3386 }
3387 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3388
3389 #ifndef CONFIG_MMU
3390 unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
3391                                       unsigned long len, unsigned long pgoff,
3392                                       unsigned long flags)
3393 {
3394         return 0;
3395 }
3396 #else
3397 # define dummy_get_unmapped_area NULL
3398 #endif
3399
3400 /*
3401  *  Register section
3402  */
3403
3404 const struct file_operations snd_pcm_f_ops[2] = {
3405         {
3406                 .owner =                THIS_MODULE,
3407                 .write =                snd_pcm_write,
3408                 .aio_write =            snd_pcm_aio_write,
3409                 .open =                 snd_pcm_playback_open,
3410                 .release =              snd_pcm_release,
3411                 .poll =                 snd_pcm_playback_poll,
3412                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3413                 .compat_ioctl =         snd_pcm_ioctl_compat,
3414                 .mmap =                 snd_pcm_mmap,
3415                 .fasync =               snd_pcm_fasync,
3416                 .get_unmapped_area =    dummy_get_unmapped_area,
3417         },
3418         {
3419                 .owner =                THIS_MODULE,
3420                 .read =                 snd_pcm_read,
3421                 .aio_read =             snd_pcm_aio_read,
3422                 .open =                 snd_pcm_capture_open,
3423                 .release =              snd_pcm_release,
3424                 .poll =                 snd_pcm_capture_poll,
3425                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3426                 .compat_ioctl =         snd_pcm_ioctl_compat,
3427                 .mmap =                 snd_pcm_mmap,
3428                 .fasync =               snd_pcm_fasync,
3429                 .get_unmapped_area =    dummy_get_unmapped_area,
3430         }
3431 };