[ALSA] Use getnstimeofday()
[linux-3.10.git] / sound / core / pcm_native.c
1 /*
2  *  Digital Audio (PCM) abstract layer
3  *  Copyright (c) by Jaroslav Kysela <perex@suse.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 <sound/driver.h>
23 #include <linux/mm.h>
24 #include <linux/smp_lock.h>
25 #include <linux/file.h>
26 #include <linux/slab.h>
27 #include <linux/time.h>
28 #include <linux/uio.h>
29 #include <sound/core.h>
30 #include <sound/control.h>
31 #include <sound/info.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/timer.h>
35 #include <sound/minors.h>
36 #include <asm/io.h>
37
38 /*
39  *  Compatibility
40  */
41
42 struct sndrv_pcm_hw_params_old {
43         unsigned int flags;
44         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
45                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
46         struct sndrv_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
47                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
48         unsigned int rmask;
49         unsigned int cmask;
50         unsigned int info;
51         unsigned int msbits;
52         unsigned int rate_num;
53         unsigned int rate_den;
54         sndrv_pcm_uframes_t fifo_size;
55         unsigned char reserved[64];
56 };
57
58 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct sndrv_pcm_hw_params_old)
59 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct sndrv_pcm_hw_params_old)
60
61 static int snd_pcm_hw_refine_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams);
62 static int snd_pcm_hw_params_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams);
63
64 /*
65  *
66  */
67
68 DEFINE_RWLOCK(snd_pcm_link_rwlock);
69 static DECLARE_RWSEM(snd_pcm_link_rwsem);
70
71
72 static inline mm_segment_t snd_enter_user(void)
73 {
74         mm_segment_t fs = get_fs();
75         set_fs(get_ds());
76         return fs;
77 }
78
79 static inline void snd_leave_user(mm_segment_t fs)
80 {
81         set_fs(fs);
82 }
83
84
85
86 int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info)
87 {
88         snd_pcm_runtime_t * runtime;
89         snd_pcm_t *pcm = substream->pcm;
90         snd_pcm_str_t *pstr = substream->pstr;
91
92         snd_assert(substream != NULL, return -ENXIO);
93         memset(info, 0, sizeof(*info));
94         info->card = pcm->card->number;
95         info->device = pcm->device;
96         info->stream = substream->stream;
97         info->subdevice = substream->number;
98         strlcpy(info->id, pcm->id, sizeof(info->id));
99         strlcpy(info->name, pcm->name, sizeof(info->name));
100         info->dev_class = pcm->dev_class;
101         info->dev_subclass = pcm->dev_subclass;
102         info->subdevices_count = pstr->substream_count;
103         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
104         strlcpy(info->subname, substream->name, sizeof(info->subname));
105         runtime = substream->runtime;
106         /* AB: FIXME!!! This is definitely nonsense */
107         if (runtime) {
108                 info->sync = runtime->sync;
109                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
110         }
111         return 0;
112 }
113
114 int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t __user * _info)
115 {
116         snd_pcm_info_t *info;
117         int err;
118
119         info = kmalloc(sizeof(*info), GFP_KERNEL);
120         if (! info)
121                 return -ENOMEM;
122         err = snd_pcm_info(substream, info);
123         if (err >= 0) {
124                 if (copy_to_user(_info, info, sizeof(*info)))
125                         err = -EFAULT;
126         }
127         kfree(info);
128         return err;
129 }
130
131 #undef RULES_DEBUG
132
133 #ifdef RULES_DEBUG
134 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
135 char *snd_pcm_hw_param_names[] = {
136         HW_PARAM(ACCESS),
137         HW_PARAM(FORMAT),
138         HW_PARAM(SUBFORMAT),
139         HW_PARAM(SAMPLE_BITS),
140         HW_PARAM(FRAME_BITS),
141         HW_PARAM(CHANNELS),
142         HW_PARAM(RATE),
143         HW_PARAM(PERIOD_TIME),
144         HW_PARAM(PERIOD_SIZE),
145         HW_PARAM(PERIOD_BYTES),
146         HW_PARAM(PERIODS),
147         HW_PARAM(BUFFER_TIME),
148         HW_PARAM(BUFFER_SIZE),
149         HW_PARAM(BUFFER_BYTES),
150         HW_PARAM(TICK_TIME),
151 };
152 #endif
153
154 int snd_pcm_hw_refine(snd_pcm_substream_t *substream, 
155                       snd_pcm_hw_params_t *params)
156 {
157         unsigned int k;
158         snd_pcm_hardware_t *hw;
159         snd_interval_t *i = NULL;
160         snd_mask_t *m = NULL;
161         snd_pcm_hw_constraints_t *constrs = &substream->runtime->hw_constraints;
162         unsigned int rstamps[constrs->rules_num];
163         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
164         unsigned int stamp = 2;
165         int changed, again;
166
167         params->info = 0;
168         params->fifo_size = 0;
169         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
170                 params->msbits = 0;
171         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
172                 params->rate_num = 0;
173                 params->rate_den = 0;
174         }
175
176         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
177                 m = hw_param_mask(params, k);
178                 if (snd_mask_empty(m))
179                         return -EINVAL;
180                 if (!(params->rmask & (1 << k)))
181                         continue;
182 #ifdef RULES_DEBUG
183                 printk("%s = ", snd_pcm_hw_param_names[k]);
184                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
185 #endif
186                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
187 #ifdef RULES_DEBUG
188                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
189 #endif
190                 if (changed)
191                         params->cmask |= 1 << k;
192                 if (changed < 0)
193                         return changed;
194         }
195
196         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
197                 i = hw_param_interval(params, k);
198                 if (snd_interval_empty(i))
199                         return -EINVAL;
200                 if (!(params->rmask & (1 << k)))
201                         continue;
202 #ifdef RULES_DEBUG
203                 printk("%s = ", snd_pcm_hw_param_names[k]);
204                 if (i->empty)
205                         printk("empty");
206                 else
207                         printk("%c%u %u%c", 
208                                i->openmin ? '(' : '[', i->min,
209                                i->max, i->openmax ? ')' : ']');
210                 printk(" -> ");
211 #endif
212                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
213 #ifdef RULES_DEBUG
214                 if (i->empty)
215                         printk("empty\n");
216                 else 
217                         printk("%c%u %u%c\n", 
218                                i->openmin ? '(' : '[', i->min,
219                                i->max, i->openmax ? ')' : ']');
220 #endif
221                 if (changed)
222                         params->cmask |= 1 << k;
223                 if (changed < 0)
224                         return changed;
225         }
226
227         for (k = 0; k < constrs->rules_num; k++)
228                 rstamps[k] = 0;
229         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 
230                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
231         do {
232                 again = 0;
233                 for (k = 0; k < constrs->rules_num; k++) {
234                         snd_pcm_hw_rule_t *r = &constrs->rules[k];
235                         unsigned int d;
236                         int doit = 0;
237                         if (r->cond && !(r->cond & params->flags))
238                                 continue;
239                         for (d = 0; r->deps[d] >= 0; d++) {
240                                 if (vstamps[r->deps[d]] > rstamps[k]) {
241                                         doit = 1;
242                                         break;
243                                 }
244                         }
245                         if (!doit)
246                                 continue;
247 #ifdef RULES_DEBUG
248                         printk("Rule %d [%p]: ", k, r->func);
249                         if (r->var >= 0) {
250                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
251                                 if (hw_is_mask(r->var)) {
252                                         m = hw_param_mask(params, r->var);
253                                         printk("%x", *m->bits);
254                                 } else {
255                                         i = hw_param_interval(params, r->var);
256                                         if (i->empty)
257                                                 printk("empty");
258                                         else
259                                                 printk("%c%u %u%c", 
260                                                        i->openmin ? '(' : '[', i->min,
261                                                        i->max, i->openmax ? ')' : ']');
262                                 }
263                         }
264 #endif
265                         changed = r->func(params, r);
266 #ifdef RULES_DEBUG
267                         if (r->var >= 0) {
268                                 printk(" -> ");
269                                 if (hw_is_mask(r->var))
270                                         printk("%x", *m->bits);
271                                 else {
272                                         if (i->empty)
273                                                 printk("empty");
274                                         else
275                                                 printk("%c%u %u%c", 
276                                                        i->openmin ? '(' : '[', i->min,
277                                                        i->max, i->openmax ? ')' : ']');
278                                 }
279                         }
280                         printk("\n");
281 #endif
282                         rstamps[k] = stamp;
283                         if (changed && r->var >= 0) {
284                                 params->cmask |= (1 << r->var);
285                                 vstamps[r->var] = stamp;
286                                 again = 1;
287                         }
288                         if (changed < 0)
289                                 return changed;
290                         stamp++;
291                 }
292         } while (again);
293         if (!params->msbits) {
294                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
295                 if (snd_interval_single(i))
296                         params->msbits = snd_interval_value(i);
297         }
298
299         if (!params->rate_den) {
300                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
301                 if (snd_interval_single(i)) {
302                         params->rate_num = snd_interval_value(i);
303                         params->rate_den = 1;
304                 }
305         }
306
307         hw = &substream->runtime->hw;
308         if (!params->info)
309                 params->info = hw->info;
310         if (!params->fifo_size)
311                 params->fifo_size = hw->fifo_size;
312         params->rmask = 0;
313         return 0;
314 }
315
316 static int snd_pcm_hw_refine_user(snd_pcm_substream_t * substream, snd_pcm_hw_params_t __user * _params)
317 {
318         snd_pcm_hw_params_t *params;
319         int err;
320
321         params = kmalloc(sizeof(*params), GFP_KERNEL);
322         if (!params) {
323                 err = -ENOMEM;
324                 goto out;
325         }
326         if (copy_from_user(params, _params, sizeof(*params))) {
327                 err = -EFAULT;
328                 goto out;
329         }
330         err = snd_pcm_hw_refine(substream, params);
331         if (copy_to_user(_params, params, sizeof(*params))) {
332                 if (!err)
333                         err = -EFAULT;
334         }
335 out:
336         kfree(params);
337         return err;
338 }
339
340 static int snd_pcm_hw_params(snd_pcm_substream_t *substream,
341                              snd_pcm_hw_params_t *params)
342 {
343         snd_pcm_runtime_t *runtime;
344         int err;
345         unsigned int bits;
346         snd_pcm_uframes_t frames;
347
348         snd_assert(substream != NULL, return -ENXIO);
349         runtime = substream->runtime;
350         snd_assert(runtime != NULL, return -ENXIO);
351         snd_pcm_stream_lock_irq(substream);
352         switch (runtime->status->state) {
353         case SNDRV_PCM_STATE_OPEN:
354         case SNDRV_PCM_STATE_SETUP:
355         case SNDRV_PCM_STATE_PREPARED:
356                 break;
357         default:
358                 snd_pcm_stream_unlock_irq(substream);
359                 return -EBADFD;
360         }
361         snd_pcm_stream_unlock_irq(substream);
362 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
363         if (!substream->oss.oss)
364 #endif
365                 if (atomic_read(&runtime->mmap_count))
366                         return -EBADFD;
367
368         params->rmask = ~0U;
369         err = snd_pcm_hw_refine(substream, params);
370         if (err < 0)
371                 goto _error;
372
373         err = snd_pcm_hw_params_choose(substream, params);
374         if (err < 0)
375                 goto _error;
376
377         if (substream->ops->hw_params != NULL) {
378                 err = substream->ops->hw_params(substream, params);
379                 if (err < 0)
380                         goto _error;
381         }
382
383         runtime->access = params_access(params);
384         runtime->format = params_format(params);
385         runtime->subformat = params_subformat(params);
386         runtime->channels = params_channels(params);
387         runtime->rate = params_rate(params);
388         runtime->period_size = params_period_size(params);
389         runtime->periods = params_periods(params);
390         runtime->buffer_size = params_buffer_size(params);
391         runtime->tick_time = params_tick_time(params);
392         runtime->info = params->info;
393         runtime->rate_num = params->rate_num;
394         runtime->rate_den = params->rate_den;
395
396         bits = snd_pcm_format_physical_width(runtime->format);
397         runtime->sample_bits = bits;
398         bits *= runtime->channels;
399         runtime->frame_bits = bits;
400         frames = 1;
401         while (bits % 8 != 0) {
402                 bits *= 2;
403                 frames *= 2;
404         }
405         runtime->byte_align = bits / 8;
406         runtime->min_align = frames;
407
408         /* Default sw params */
409         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
410         runtime->period_step = 1;
411         runtime->sleep_min = 0;
412         runtime->control->avail_min = runtime->period_size;
413         runtime->xfer_align = runtime->period_size;
414         runtime->start_threshold = 1;
415         runtime->stop_threshold = runtime->buffer_size;
416         runtime->silence_threshold = 0;
417         runtime->silence_size = 0;
418         runtime->boundary = runtime->buffer_size;
419         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
420                 runtime->boundary *= 2;
421
422         snd_pcm_timer_resolution_change(substream);
423         runtime->status->state = SNDRV_PCM_STATE_SETUP;
424         return 0;
425  _error:
426         /* hardware might be unuseable from this time,
427            so we force application to retry to set
428            the correct hardware parameter settings */
429         runtime->status->state = SNDRV_PCM_STATE_OPEN;
430         if (substream->ops->hw_free != NULL)
431                 substream->ops->hw_free(substream);
432         return err;
433 }
434
435 static int snd_pcm_hw_params_user(snd_pcm_substream_t * substream, snd_pcm_hw_params_t __user * _params)
436 {
437         snd_pcm_hw_params_t *params;
438         int err;
439
440         params = kmalloc(sizeof(*params), GFP_KERNEL);
441         if (!params) {
442                 err = -ENOMEM;
443                 goto out;
444         }
445         if (copy_from_user(params, _params, sizeof(*params))) {
446                 err = -EFAULT;
447                 goto out;
448         }
449         err = snd_pcm_hw_params(substream, params);
450         if (copy_to_user(_params, params, sizeof(*params))) {
451                 if (!err)
452                         err = -EFAULT;
453         }
454 out:
455         kfree(params);
456         return err;
457 }
458
459 static int snd_pcm_hw_free(snd_pcm_substream_t * substream)
460 {
461         snd_pcm_runtime_t *runtime;
462         int result = 0;
463
464         snd_assert(substream != NULL, return -ENXIO);
465         runtime = substream->runtime;
466         snd_assert(runtime != NULL, return -ENXIO);
467         snd_pcm_stream_lock_irq(substream);
468         switch (runtime->status->state) {
469         case SNDRV_PCM_STATE_SETUP:
470         case SNDRV_PCM_STATE_PREPARED:
471                 break;
472         default:
473                 snd_pcm_stream_unlock_irq(substream);
474                 return -EBADFD;
475         }
476         snd_pcm_stream_unlock_irq(substream);
477         if (atomic_read(&runtime->mmap_count))
478                 return -EBADFD;
479         if (substream->ops->hw_free)
480                 result = substream->ops->hw_free(substream);
481         runtime->status->state = SNDRV_PCM_STATE_OPEN;
482         return result;
483 }
484
485 static int snd_pcm_sw_params(snd_pcm_substream_t * substream, snd_pcm_sw_params_t *params)
486 {
487         snd_pcm_runtime_t *runtime;
488
489         snd_assert(substream != NULL, return -ENXIO);
490         runtime = substream->runtime;
491         snd_assert(runtime != NULL, return -ENXIO);
492         snd_pcm_stream_lock_irq(substream);
493         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
494                 snd_pcm_stream_unlock_irq(substream);
495                 return -EBADFD;
496         }
497         snd_pcm_stream_unlock_irq(substream);
498
499         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
500                 return -EINVAL;
501         if (params->avail_min == 0)
502                 return -EINVAL;
503         if (params->xfer_align == 0 ||
504             params->xfer_align % runtime->min_align != 0)
505                 return -EINVAL;
506         if (params->silence_size >= runtime->boundary) {
507                 if (params->silence_threshold != 0)
508                         return -EINVAL;
509         } else {
510                 if (params->silence_size > params->silence_threshold)
511                         return -EINVAL;
512                 if (params->silence_threshold > runtime->buffer_size)
513                         return -EINVAL;
514         }
515         snd_pcm_stream_lock_irq(substream);
516         runtime->tstamp_mode = params->tstamp_mode;
517         runtime->sleep_min = params->sleep_min;
518         runtime->period_step = params->period_step;
519         runtime->control->avail_min = params->avail_min;
520         runtime->start_threshold = params->start_threshold;
521         runtime->stop_threshold = params->stop_threshold;
522         runtime->silence_threshold = params->silence_threshold;
523         runtime->silence_size = params->silence_size;
524         runtime->xfer_align = params->xfer_align;
525         params->boundary = runtime->boundary;
526         if (snd_pcm_running(substream)) {
527                 if (runtime->sleep_min)
528                         snd_pcm_tick_prepare(substream);
529                 else
530                         snd_pcm_tick_set(substream, 0);
531                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
532                     runtime->silence_size > 0)
533                         snd_pcm_playback_silence(substream, ULONG_MAX);
534                 wake_up(&runtime->sleep);
535         }
536         snd_pcm_stream_unlock_irq(substream);
537         return 0;
538 }
539
540 static int snd_pcm_sw_params_user(snd_pcm_substream_t * substream, snd_pcm_sw_params_t __user * _params)
541 {
542         snd_pcm_sw_params_t params;
543         int err;
544         if (copy_from_user(&params, _params, sizeof(params)))
545                 return -EFAULT;
546         err = snd_pcm_sw_params(substream, &params);
547         if (copy_to_user(_params, &params, sizeof(params)))
548                 return -EFAULT;
549         return err;
550 }
551
552 int snd_pcm_status(snd_pcm_substream_t *substream,
553                    snd_pcm_status_t *status)
554 {
555         snd_pcm_runtime_t *runtime = substream->runtime;
556
557         snd_pcm_stream_lock_irq(substream);
558         status->state = runtime->status->state;
559         status->suspended_state = runtime->status->suspended_state;
560         if (status->state == SNDRV_PCM_STATE_OPEN)
561                 goto _end;
562         status->trigger_tstamp = runtime->trigger_tstamp;
563         if (snd_pcm_running(substream)) {
564                 snd_pcm_update_hw_ptr(substream);
565                 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
566                         status->tstamp = runtime->status->tstamp;
567                 else
568                         getnstimeofday(&status->tstamp);
569         } else
570                 getnstimeofday(&status->tstamp);
571         status->appl_ptr = runtime->control->appl_ptr;
572         status->hw_ptr = runtime->status->hw_ptr;
573         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
574                 status->avail = snd_pcm_playback_avail(runtime);
575                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
576                     runtime->status->state == SNDRV_PCM_STATE_DRAINING)
577                         status->delay = runtime->buffer_size - status->avail;
578                 else
579                         status->delay = 0;
580         } else {
581                 status->avail = snd_pcm_capture_avail(runtime);
582                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
583                         status->delay = status->avail;
584                 else
585                         status->delay = 0;
586         }
587         status->avail_max = runtime->avail_max;
588         status->overrange = runtime->overrange;
589         runtime->avail_max = 0;
590         runtime->overrange = 0;
591  _end:
592         snd_pcm_stream_unlock_irq(substream);
593         return 0;
594 }
595
596 static int snd_pcm_status_user(snd_pcm_substream_t * substream, snd_pcm_status_t __user * _status)
597 {
598         snd_pcm_status_t status;
599         snd_pcm_runtime_t *runtime;
600         int res;
601         
602         snd_assert(substream != NULL, return -ENXIO);
603         runtime = substream->runtime;
604         memset(&status, 0, sizeof(status));
605         res = snd_pcm_status(substream, &status);
606         if (res < 0)
607                 return res;
608         if (copy_to_user(_status, &status, sizeof(status)))
609                 return -EFAULT;
610         return 0;
611 }
612
613 static int snd_pcm_channel_info(snd_pcm_substream_t * substream, snd_pcm_channel_info_t * info)
614 {
615         snd_pcm_runtime_t *runtime;
616         unsigned int channel;
617         
618         snd_assert(substream != NULL, return -ENXIO);
619         channel = info->channel;
620         runtime = substream->runtime;
621         snd_pcm_stream_lock_irq(substream);
622         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
623                 snd_pcm_stream_unlock_irq(substream);
624                 return -EBADFD;
625         }
626         snd_pcm_stream_unlock_irq(substream);
627         if (channel >= runtime->channels)
628                 return -EINVAL;
629         memset(info, 0, sizeof(*info));
630         info->channel = channel;
631         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
632 }
633
634 static int snd_pcm_channel_info_user(snd_pcm_substream_t * substream, snd_pcm_channel_info_t __user * _info)
635 {
636         snd_pcm_channel_info_t info;
637         int res;
638         
639         if (copy_from_user(&info, _info, sizeof(info)))
640                 return -EFAULT;
641         res = snd_pcm_channel_info(substream, &info);
642         if (res < 0)
643                 return res;
644         if (copy_to_user(_info, &info, sizeof(info)))
645                 return -EFAULT;
646         return 0;
647 }
648
649 static void snd_pcm_trigger_tstamp(snd_pcm_substream_t *substream)
650 {
651         snd_pcm_runtime_t *runtime = substream->runtime;
652         if (runtime->trigger_master == NULL)
653                 return;
654         if (runtime->trigger_master == substream) {
655                 getnstimeofday(&runtime->trigger_tstamp);
656         } else {
657                 snd_pcm_trigger_tstamp(runtime->trigger_master);
658                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
659         }
660         runtime->trigger_master = NULL;
661 }
662
663 struct action_ops {
664         int (*pre_action)(snd_pcm_substream_t *substream, int state);
665         int (*do_action)(snd_pcm_substream_t *substream, int state);
666         void (*undo_action)(snd_pcm_substream_t *substream, int state);
667         void (*post_action)(snd_pcm_substream_t *substream, int state);
668 };
669
670 /*
671  *  this functions is core for handling of linked stream
672  *  Note: the stream state might be changed also on failure
673  *  Note2: call with calling stream lock + link lock
674  */
675 static int snd_pcm_action_group(struct action_ops *ops,
676                                 snd_pcm_substream_t *substream,
677                                 int state, int do_lock)
678 {
679         struct list_head *pos;
680         snd_pcm_substream_t *s = NULL;
681         snd_pcm_substream_t *s1;
682         int res = 0;
683
684         snd_pcm_group_for_each(pos, substream) {
685                 s = snd_pcm_group_substream_entry(pos);
686                 if (do_lock && s != substream)
687                         spin_lock(&s->self_group.lock);
688                 res = ops->pre_action(s, state);
689                 if (res < 0)
690                         goto _unlock;
691         }
692         snd_pcm_group_for_each(pos, substream) {
693                 s = snd_pcm_group_substream_entry(pos);
694                 res = ops->do_action(s, state);
695                 if (res < 0) {
696                         if (ops->undo_action) {
697                                 snd_pcm_group_for_each(pos, substream) {
698                                         s1 = snd_pcm_group_substream_entry(pos);
699                                         if (s1 == s) /* failed stream */
700                                                 break;
701                                         ops->undo_action(s1, state);
702                                 }
703                         }
704                         s = NULL; /* unlock all */
705                         goto _unlock;
706                 }
707         }
708         snd_pcm_group_for_each(pos, substream) {
709                 s = snd_pcm_group_substream_entry(pos);
710                 ops->post_action(s, state);
711         }
712  _unlock:
713         if (do_lock) {
714                 /* unlock streams */
715                 snd_pcm_group_for_each(pos, substream) {
716                         s1 = snd_pcm_group_substream_entry(pos);
717                         if (s1 != substream)
718                                 spin_unlock(&s1->self_group.lock);
719                         if (s1 == s)    /* end */
720                                 break;
721                 }
722         }
723         return res;
724 }
725
726 /*
727  *  Note: call with stream lock
728  */
729 static int snd_pcm_action_single(struct action_ops *ops,
730                                  snd_pcm_substream_t *substream,
731                                  int state)
732 {
733         int res;
734         
735         res = ops->pre_action(substream, state);
736         if (res < 0)
737                 return res;
738         res = ops->do_action(substream, state);
739         if (res == 0)
740                 ops->post_action(substream, state);
741         else if (ops->undo_action)
742                 ops->undo_action(substream, state);
743         return res;
744 }
745
746 /*
747  *  Note: call with stream lock
748  */
749 static int snd_pcm_action(struct action_ops *ops,
750                           snd_pcm_substream_t *substream,
751                           int state)
752 {
753         int res;
754
755         if (snd_pcm_stream_linked(substream)) {
756                 if (!spin_trylock(&substream->group->lock)) {
757                         spin_unlock(&substream->self_group.lock);
758                         spin_lock(&substream->group->lock);
759                         spin_lock(&substream->self_group.lock);
760                 }
761                 res = snd_pcm_action_group(ops, substream, state, 1);
762                 spin_unlock(&substream->group->lock);
763         } else {
764                 res = snd_pcm_action_single(ops, substream, state);
765         }
766         return res;
767 }
768
769 /*
770  *  Note: don't use any locks before
771  */
772 static int snd_pcm_action_lock_irq(struct action_ops *ops,
773                                    snd_pcm_substream_t *substream,
774                                    int state)
775 {
776         int res;
777
778         read_lock_irq(&snd_pcm_link_rwlock);
779         if (snd_pcm_stream_linked(substream)) {
780                 spin_lock(&substream->group->lock);
781                 spin_lock(&substream->self_group.lock);
782                 res = snd_pcm_action_group(ops, substream, state, 1);
783                 spin_unlock(&substream->self_group.lock);
784                 spin_unlock(&substream->group->lock);
785         } else {
786                 spin_lock(&substream->self_group.lock);
787                 res = snd_pcm_action_single(ops, substream, state);
788                 spin_unlock(&substream->self_group.lock);
789         }
790         read_unlock_irq(&snd_pcm_link_rwlock);
791         return res;
792 }
793
794 /*
795  */
796 static int snd_pcm_action_nonatomic(struct action_ops *ops,
797                                     snd_pcm_substream_t *substream,
798                                     int state)
799 {
800         int res;
801
802         down_read(&snd_pcm_link_rwsem);
803         if (snd_pcm_stream_linked(substream))
804                 res = snd_pcm_action_group(ops, substream, state, 0);
805         else
806                 res = snd_pcm_action_single(ops, substream, state);
807         up_read(&snd_pcm_link_rwsem);
808         return res;
809 }
810
811 /*
812  * start callbacks
813  */
814 static int snd_pcm_pre_start(snd_pcm_substream_t *substream, int state)
815 {
816         snd_pcm_runtime_t *runtime = substream->runtime;
817         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
818                 return -EBADFD;
819         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
820             !snd_pcm_playback_data(substream))
821                 return -EPIPE;
822         runtime->trigger_master = substream;
823         return 0;
824 }
825
826 static int snd_pcm_do_start(snd_pcm_substream_t *substream, int state)
827 {
828         if (substream->runtime->trigger_master != substream)
829                 return 0;
830         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
831 }
832
833 static void snd_pcm_undo_start(snd_pcm_substream_t *substream, int state)
834 {
835         if (substream->runtime->trigger_master == substream)
836                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
837 }
838
839 static void snd_pcm_post_start(snd_pcm_substream_t *substream, int state)
840 {
841         snd_pcm_runtime_t *runtime = substream->runtime;
842         snd_pcm_trigger_tstamp(substream);
843         runtime->status->state = state;
844         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
845             runtime->silence_size > 0)
846                 snd_pcm_playback_silence(substream, ULONG_MAX);
847         if (runtime->sleep_min)
848                 snd_pcm_tick_prepare(substream);
849         if (substream->timer)
850                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART, &runtime->trigger_tstamp);
851 }
852
853 static struct action_ops snd_pcm_action_start = {
854         .pre_action = snd_pcm_pre_start,
855         .do_action = snd_pcm_do_start,
856         .undo_action = snd_pcm_undo_start,
857         .post_action = snd_pcm_post_start
858 };
859
860 /**
861  * snd_pcm_start
862  * @substream: the PCM substream instance
863  *
864  * Start all linked streams.
865  */
866 int snd_pcm_start(snd_pcm_substream_t *substream)
867 {
868         return snd_pcm_action(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
869 }
870
871 /*
872  * stop callbacks
873  */
874 static int snd_pcm_pre_stop(snd_pcm_substream_t *substream, int state)
875 {
876         snd_pcm_runtime_t *runtime = substream->runtime;
877         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
878                 return -EBADFD;
879         runtime->trigger_master = substream;
880         return 0;
881 }
882
883 static int snd_pcm_do_stop(snd_pcm_substream_t *substream, int state)
884 {
885         if (substream->runtime->trigger_master == substream &&
886             snd_pcm_running(substream))
887                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
888         return 0; /* unconditonally stop all substreams */
889 }
890
891 static void snd_pcm_post_stop(snd_pcm_substream_t *substream, int state)
892 {
893         snd_pcm_runtime_t *runtime = substream->runtime;
894         if (runtime->status->state != state) {
895                 snd_pcm_trigger_tstamp(substream);
896                 if (substream->timer)
897                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, &runtime->trigger_tstamp);
898                 runtime->status->state = state;
899                 snd_pcm_tick_set(substream, 0);
900         }
901         wake_up(&runtime->sleep);
902 }
903
904 static struct action_ops snd_pcm_action_stop = {
905         .pre_action = snd_pcm_pre_stop,
906         .do_action = snd_pcm_do_stop,
907         .post_action = snd_pcm_post_stop
908 };
909
910 /**
911  * snd_pcm_stop
912  * @substream: the PCM substream instance
913  * @state: PCM state after stopping the stream
914  *
915  * Try to stop all running streams in the substream group.
916  * The state of each stream is changed to the given value after that unconditionally.
917  */
918 int snd_pcm_stop(snd_pcm_substream_t *substream, int state)
919 {
920         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
921 }
922
923 /**
924  * snd_pcm_drain_done
925  * @substream: the PCM substream
926  *
927  * Stop the DMA only when the given stream is playback.
928  * The state is changed to SETUP.
929  * Unlike snd_pcm_stop(), this affects only the given stream.
930  */
931 int snd_pcm_drain_done(snd_pcm_substream_t *substream)
932 {
933         return snd_pcm_action_single(&snd_pcm_action_stop, substream, SNDRV_PCM_STATE_SETUP);
934 }
935
936 /*
937  * pause callbacks
938  */
939 static int snd_pcm_pre_pause(snd_pcm_substream_t *substream, int push)
940 {
941         snd_pcm_runtime_t *runtime = substream->runtime;
942         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
943                 return -ENOSYS;
944         if (push) {
945                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
946                         return -EBADFD;
947         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
948                 return -EBADFD;
949         runtime->trigger_master = substream;
950         return 0;
951 }
952
953 static int snd_pcm_do_pause(snd_pcm_substream_t *substream, int push)
954 {
955         if (substream->runtime->trigger_master != substream)
956                 return 0;
957         return substream->ops->trigger(substream,
958                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
959                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
960 }
961
962 static void snd_pcm_undo_pause(snd_pcm_substream_t *substream, int push)
963 {
964         if (substream->runtime->trigger_master == substream)
965                 substream->ops->trigger(substream,
966                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
967                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
968 }
969
970 static void snd_pcm_post_pause(snd_pcm_substream_t *substream, int push)
971 {
972         snd_pcm_runtime_t *runtime = substream->runtime;
973         snd_pcm_trigger_tstamp(substream);
974         if (push) {
975                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
976                 if (substream->timer)
977                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MPAUSE, &runtime->trigger_tstamp);
978                 snd_pcm_tick_set(substream, 0);
979                 wake_up(&runtime->sleep);
980         } else {
981                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
982                 if (runtime->sleep_min)
983                         snd_pcm_tick_prepare(substream);
984                 if (substream->timer)
985                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MCONTINUE, &runtime->trigger_tstamp);
986         }
987 }
988
989 static struct action_ops snd_pcm_action_pause = {
990         .pre_action = snd_pcm_pre_pause,
991         .do_action = snd_pcm_do_pause,
992         .undo_action = snd_pcm_undo_pause,
993         .post_action = snd_pcm_post_pause
994 };
995
996 /*
997  * Push/release the pause for all linked streams.
998  */
999 static int snd_pcm_pause(snd_pcm_substream_t *substream, int push)
1000 {
1001         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1002 }
1003
1004 #ifdef CONFIG_PM
1005 /* suspend */
1006
1007 static int snd_pcm_pre_suspend(snd_pcm_substream_t *substream, int state)
1008 {
1009         snd_pcm_runtime_t *runtime = substream->runtime;
1010         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1011                 return -EBUSY;
1012         runtime->trigger_master = substream;
1013         return 0;
1014 }
1015
1016 static int snd_pcm_do_suspend(snd_pcm_substream_t *substream, int state)
1017 {
1018         snd_pcm_runtime_t *runtime = substream->runtime;
1019         if (runtime->trigger_master != substream)
1020                 return 0;
1021         if (! snd_pcm_running(substream))
1022                 return 0;
1023         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1024         return 0; /* suspend unconditionally */
1025 }
1026
1027 static void snd_pcm_post_suspend(snd_pcm_substream_t *substream, int state)
1028 {
1029         snd_pcm_runtime_t *runtime = substream->runtime;
1030         snd_pcm_trigger_tstamp(substream);
1031         if (substream->timer)
1032                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, &runtime->trigger_tstamp);
1033         runtime->status->suspended_state = runtime->status->state;
1034         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1035         snd_pcm_tick_set(substream, 0);
1036         wake_up(&runtime->sleep);
1037 }
1038
1039 static struct action_ops snd_pcm_action_suspend = {
1040         .pre_action = snd_pcm_pre_suspend,
1041         .do_action = snd_pcm_do_suspend,
1042         .post_action = snd_pcm_post_suspend
1043 };
1044
1045 /**
1046  * snd_pcm_suspend
1047  * @substream: the PCM substream
1048  *
1049  * Trigger SUSPEND to all linked streams.
1050  * After this call, all streams are changed to SUSPENDED state.
1051  */
1052 int snd_pcm_suspend(snd_pcm_substream_t *substream)
1053 {
1054         int err;
1055         unsigned long flags;
1056
1057         snd_pcm_stream_lock_irqsave(substream, flags);
1058         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1059         snd_pcm_stream_unlock_irqrestore(substream, flags);
1060         return err;
1061 }
1062
1063 /**
1064  * snd_pcm_suspend_all
1065  * @pcm: the PCM instance
1066  *
1067  * Trigger SUSPEND to all substreams in the given pcm.
1068  * After this call, all streams are changed to SUSPENDED state.
1069  */
1070 int snd_pcm_suspend_all(snd_pcm_t *pcm)
1071 {
1072         snd_pcm_substream_t *substream;
1073         int stream, err = 0;
1074
1075         for (stream = 0; stream < 2; stream++) {
1076                 for (substream = pcm->streams[stream].substream; substream; substream = substream->next) {
1077                         /* FIXME: the open/close code should lock this as well */
1078                         if (substream->runtime == NULL)
1079                                 continue;
1080                         err = snd_pcm_suspend(substream);
1081                         if (err < 0 && err != -EBUSY)
1082                                 return err;
1083                 }
1084         }
1085         return 0;
1086 }
1087
1088 /* resume */
1089
1090 static int snd_pcm_pre_resume(snd_pcm_substream_t *substream, int state)
1091 {
1092         snd_pcm_runtime_t *runtime = substream->runtime;
1093         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1094                 return -ENOSYS;
1095         runtime->trigger_master = substream;
1096         return 0;
1097 }
1098
1099 static int snd_pcm_do_resume(snd_pcm_substream_t *substream, int state)
1100 {
1101         snd_pcm_runtime_t *runtime = substream->runtime;
1102         if (runtime->trigger_master != substream)
1103                 return 0;
1104         /* DMA not running previously? */
1105         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1106             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1107              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1108                 return 0;
1109         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1110 }
1111
1112 static void snd_pcm_undo_resume(snd_pcm_substream_t *substream, int state)
1113 {
1114         if (substream->runtime->trigger_master == substream &&
1115             snd_pcm_running(substream))
1116                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1117 }
1118
1119 static void snd_pcm_post_resume(snd_pcm_substream_t *substream, int state)
1120 {
1121         snd_pcm_runtime_t *runtime = substream->runtime;
1122         snd_pcm_trigger_tstamp(substream);
1123         if (substream->timer)
1124                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, &runtime->trigger_tstamp);
1125         runtime->status->state = runtime->status->suspended_state;
1126         if (runtime->sleep_min)
1127                 snd_pcm_tick_prepare(substream);
1128 }
1129
1130 static struct action_ops snd_pcm_action_resume = {
1131         .pre_action = snd_pcm_pre_resume,
1132         .do_action = snd_pcm_do_resume,
1133         .undo_action = snd_pcm_undo_resume,
1134         .post_action = snd_pcm_post_resume
1135 };
1136
1137 static int snd_pcm_resume(snd_pcm_substream_t *substream)
1138 {
1139         snd_card_t *card = substream->pcm->card;
1140         int res;
1141
1142         snd_power_lock(card);
1143         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0)
1144                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1145         snd_power_unlock(card);
1146         return res;
1147 }
1148
1149 #else
1150
1151 static int snd_pcm_resume(snd_pcm_substream_t *substream)
1152 {
1153         return -ENOSYS;
1154 }
1155
1156 #endif /* CONFIG_PM */
1157
1158 /*
1159  * xrun ioctl
1160  *
1161  * Change the RUNNING stream(s) to XRUN state.
1162  */
1163 static int snd_pcm_xrun(snd_pcm_substream_t *substream)
1164 {
1165         snd_card_t *card = substream->pcm->card;
1166         snd_pcm_runtime_t *runtime = substream->runtime;
1167         int result;
1168
1169         snd_power_lock(card);
1170         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1171                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile);
1172                 if (result < 0)
1173                         goto _unlock;
1174         }
1175
1176         snd_pcm_stream_lock_irq(substream);
1177         switch (runtime->status->state) {
1178         case SNDRV_PCM_STATE_XRUN:
1179                 result = 0;     /* already there */
1180                 break;
1181         case SNDRV_PCM_STATE_RUNNING:
1182                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1183                 break;
1184         default:
1185                 result = -EBADFD;
1186         }
1187         snd_pcm_stream_unlock_irq(substream);
1188  _unlock:
1189         snd_power_unlock(card);
1190         return result;
1191 }
1192
1193 /*
1194  * reset ioctl
1195  */
1196 static int snd_pcm_pre_reset(snd_pcm_substream_t * substream, int state)
1197 {
1198         snd_pcm_runtime_t *runtime = substream->runtime;
1199         switch (runtime->status->state) {
1200         case SNDRV_PCM_STATE_RUNNING:
1201         case SNDRV_PCM_STATE_PREPARED:
1202         case SNDRV_PCM_STATE_PAUSED:
1203         case SNDRV_PCM_STATE_SUSPENDED:
1204                 return 0;
1205         default:
1206                 return -EBADFD;
1207         }
1208 }
1209
1210 static int snd_pcm_do_reset(snd_pcm_substream_t * substream, int state)
1211 {
1212         snd_pcm_runtime_t *runtime = substream->runtime;
1213         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1214         if (err < 0)
1215                 return err;
1216         // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1217         runtime->hw_ptr_base = 0;
1218         runtime->hw_ptr_interrupt = runtime->status->hw_ptr - runtime->status->hw_ptr % runtime->period_size;
1219         runtime->silence_start = runtime->status->hw_ptr;
1220         runtime->silence_filled = 0;
1221         return 0;
1222 }
1223
1224 static void snd_pcm_post_reset(snd_pcm_substream_t * substream, int state)
1225 {
1226         snd_pcm_runtime_t *runtime = substream->runtime;
1227         runtime->control->appl_ptr = runtime->status->hw_ptr;
1228         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1229             runtime->silence_size > 0)
1230                 snd_pcm_playback_silence(substream, ULONG_MAX);
1231 }
1232
1233 static struct action_ops snd_pcm_action_reset = {
1234         .pre_action = snd_pcm_pre_reset,
1235         .do_action = snd_pcm_do_reset,
1236         .post_action = snd_pcm_post_reset
1237 };
1238
1239 static int snd_pcm_reset(snd_pcm_substream_t *substream)
1240 {
1241         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1242 }
1243
1244 /*
1245  * prepare ioctl
1246  */
1247 static int snd_pcm_pre_prepare(snd_pcm_substream_t * substream, int state)
1248 {
1249         snd_pcm_runtime_t *runtime = substream->runtime;
1250         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1251                 return -EBADFD;
1252         if (snd_pcm_running(substream))
1253                 return -EBUSY;
1254         return 0;
1255 }
1256
1257 static int snd_pcm_do_prepare(snd_pcm_substream_t * substream, int state)
1258 {
1259         int err;
1260         err = substream->ops->prepare(substream);
1261         if (err < 0)
1262                 return err;
1263         return snd_pcm_do_reset(substream, 0);
1264 }
1265
1266 static void snd_pcm_post_prepare(snd_pcm_substream_t * substream, int state)
1267 {
1268         snd_pcm_runtime_t *runtime = substream->runtime;
1269         runtime->control->appl_ptr = runtime->status->hw_ptr;
1270         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1271 }
1272
1273 static struct action_ops snd_pcm_action_prepare = {
1274         .pre_action = snd_pcm_pre_prepare,
1275         .do_action = snd_pcm_do_prepare,
1276         .post_action = snd_pcm_post_prepare
1277 };
1278
1279 /**
1280  * snd_pcm_prepare
1281  * @substream: the PCM substream instance
1282  *
1283  * Prepare the PCM substream to be triggerable.
1284  */
1285 int snd_pcm_prepare(snd_pcm_substream_t *substream)
1286 {
1287         int res;
1288         snd_card_t *card = substream->pcm->card;
1289
1290         snd_power_lock(card);
1291         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0)
1292                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, substream, 0);
1293         snd_power_unlock(card);
1294         return res;
1295 }
1296
1297 /*
1298  * drain ioctl
1299  */
1300
1301 static int snd_pcm_pre_drain_init(snd_pcm_substream_t * substream, int state)
1302 {
1303         if (substream->ffile->f_flags & O_NONBLOCK)
1304                 return -EAGAIN;
1305         substream->runtime->trigger_master = substream;
1306         return 0;
1307 }
1308
1309 static int snd_pcm_do_drain_init(snd_pcm_substream_t * substream, int state)
1310 {
1311         snd_pcm_runtime_t *runtime = substream->runtime;
1312         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1313                 switch (runtime->status->state) {
1314                 case SNDRV_PCM_STATE_PREPARED:
1315                         /* start playback stream if possible */
1316                         if (! snd_pcm_playback_empty(substream)) {
1317                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1318                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1319                         }
1320                         break;
1321                 case SNDRV_PCM_STATE_RUNNING:
1322                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1323                         break;
1324                 default:
1325                         break;
1326                 }
1327         } else {
1328                 /* stop running stream */
1329                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1330                         int state = snd_pcm_capture_avail(runtime) > 0 ?
1331                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1332                         snd_pcm_do_stop(substream, state);
1333                         snd_pcm_post_stop(substream, state);
1334                 }
1335         }
1336         return 0;
1337 }
1338
1339 static void snd_pcm_post_drain_init(snd_pcm_substream_t * substream, int state)
1340 {
1341 }
1342
1343 static struct action_ops snd_pcm_action_drain_init = {
1344         .pre_action = snd_pcm_pre_drain_init,
1345         .do_action = snd_pcm_do_drain_init,
1346         .post_action = snd_pcm_post_drain_init
1347 };
1348
1349 struct drain_rec {
1350         snd_pcm_substream_t *substream;
1351         wait_queue_t wait;
1352         snd_pcm_uframes_t stop_threshold;
1353 };
1354
1355 static int snd_pcm_drop(snd_pcm_substream_t *substream);
1356
1357 /*
1358  * Drain the stream(s).
1359  * When the substream is linked, sync until the draining of all playback streams
1360  * is finished.
1361  * After this call, all streams are supposed to be either SETUP or DRAINING
1362  * (capture only) state.
1363  */
1364 static int snd_pcm_drain(snd_pcm_substream_t *substream)
1365 {
1366         snd_card_t *card;
1367         snd_pcm_runtime_t *runtime;
1368         struct list_head *pos;
1369         int result = 0;
1370         int i, num_drecs;
1371         struct drain_rec *drec, drec_tmp, *d;
1372
1373         snd_assert(substream != NULL, return -ENXIO);
1374         card = substream->pcm->card;
1375         runtime = substream->runtime;
1376
1377         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1378                 return -EBADFD;
1379
1380         snd_power_lock(card);
1381         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1382                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile);
1383                 if (result < 0) {
1384                         snd_power_unlock(card);
1385                         return result;
1386                 }
1387         }
1388
1389         /* allocate temporary record for drain sync */
1390         down_read(&snd_pcm_link_rwsem);
1391         if (snd_pcm_stream_linked(substream)) {
1392                 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1393                 if (! drec) {
1394                         up_read(&snd_pcm_link_rwsem);
1395                         snd_power_unlock(card);
1396                         return -ENOMEM;
1397                 }
1398         } else
1399                 drec = &drec_tmp;
1400
1401         /* count only playback streams */
1402         num_drecs = 0;
1403         snd_pcm_group_for_each(pos, substream) {
1404                 snd_pcm_substream_t *s = snd_pcm_group_substream_entry(pos);
1405                 runtime = s->runtime;
1406                 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1407                         d = &drec[num_drecs++];
1408                         d->substream = s;
1409                         init_waitqueue_entry(&d->wait, current);
1410                         add_wait_queue(&runtime->sleep, &d->wait);
1411                         /* stop_threshold fixup to avoid endless loop when
1412                          * stop_threshold > buffer_size
1413                          */
1414                         d->stop_threshold = runtime->stop_threshold;
1415                         if (runtime->stop_threshold > runtime->buffer_size)
1416                                 runtime->stop_threshold = runtime->buffer_size;
1417                 }
1418         }
1419         up_read(&snd_pcm_link_rwsem);
1420         if (! num_drecs)
1421                 goto _error;
1422
1423         snd_pcm_stream_lock_irq(substream);
1424         /* resume pause */
1425         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1426                 snd_pcm_pause(substream, 0);
1427
1428         /* pre-start/stop - all running streams are changed to DRAINING state */
1429         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1430         if (result < 0) {
1431                 snd_pcm_stream_unlock_irq(substream);
1432                 goto _error;
1433         }
1434
1435         for (;;) {
1436                 long tout;
1437                 if (signal_pending(current)) {
1438                         result = -ERESTARTSYS;
1439                         break;
1440                 }
1441                 /* all finished? */
1442                 for (i = 0; i < num_drecs; i++) {
1443                         runtime = drec[i].substream->runtime;
1444                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1445                                 break;
1446                 }
1447                 if (i == num_drecs)
1448                         break; /* yes, all drained */
1449
1450                 set_current_state(TASK_INTERRUPTIBLE);
1451                 snd_pcm_stream_unlock_irq(substream);
1452                 snd_power_unlock(card);
1453                 tout = schedule_timeout(10 * HZ);
1454                 snd_power_lock(card);
1455                 snd_pcm_stream_lock_irq(substream);
1456                 if (tout == 0) {
1457                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1458                                 result = -ESTRPIPE;
1459                         else {
1460                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1461                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1462                                 result = -EIO;
1463                         }
1464                         break;
1465                 }
1466         }
1467
1468         snd_pcm_stream_unlock_irq(substream);
1469
1470  _error:
1471         for (i = 0; i < num_drecs; i++) {
1472                 d = &drec[i];
1473                 runtime = d->substream->runtime;
1474                 remove_wait_queue(&runtime->sleep, &d->wait);
1475                 runtime->stop_threshold = d->stop_threshold;
1476         }
1477
1478         if (drec != &drec_tmp)
1479                 kfree(drec);
1480         snd_power_unlock(card);
1481
1482         return result;
1483 }
1484
1485 /*
1486  * drop ioctl
1487  *
1488  * Immediately put all linked substreams into SETUP state.
1489  */
1490 static int snd_pcm_drop(snd_pcm_substream_t *substream)
1491 {
1492         snd_pcm_runtime_t *runtime;
1493         snd_card_t *card;
1494         int result = 0;
1495         
1496         snd_assert(substream != NULL, return -ENXIO);
1497         runtime = substream->runtime;
1498         card = substream->pcm->card;
1499
1500         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1501                 return -EBADFD;
1502
1503         snd_power_lock(card);
1504         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1505                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile);
1506                 if (result < 0)
1507                         goto _unlock;
1508         }
1509
1510         snd_pcm_stream_lock_irq(substream);
1511         /* resume pause */
1512         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1513                 snd_pcm_pause(substream, 0);
1514
1515         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1516         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1517         snd_pcm_stream_unlock_irq(substream);
1518  _unlock:
1519         snd_power_unlock(card);
1520         return result;
1521 }
1522
1523
1524 /* WARNING: Don't forget to fput back the file */
1525 extern int snd_major;
1526 static struct file *snd_pcm_file_fd(int fd)
1527 {
1528         struct file *file;
1529         struct inode *inode;
1530         unsigned short minor;
1531         file = fget(fd);
1532         if (!file)
1533                 return NULL;
1534         inode = file->f_dentry->d_inode;
1535         if (!S_ISCHR(inode->i_mode) ||
1536             imajor(inode) != snd_major) {
1537                 fput(file);
1538                 return NULL;
1539         }
1540         minor = iminor(inode);
1541         if (minor >= 256 || 
1542             minor % SNDRV_MINOR_DEVICES < SNDRV_MINOR_PCM_PLAYBACK) {
1543                 fput(file);
1544                 return NULL;
1545         }
1546         return file;
1547 }
1548
1549 /*
1550  * PCM link handling
1551  */
1552 static int snd_pcm_link(snd_pcm_substream_t *substream, int fd)
1553 {
1554         int res = 0;
1555         struct file *file;
1556         snd_pcm_file_t *pcm_file;
1557         snd_pcm_substream_t *substream1;
1558
1559         file = snd_pcm_file_fd(fd);
1560         if (!file)
1561                 return -EBADFD;
1562         pcm_file = file->private_data;
1563         substream1 = pcm_file->substream;
1564         down_write(&snd_pcm_link_rwsem);
1565         write_lock_irq(&snd_pcm_link_rwlock);
1566         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1567             substream->runtime->status->state != substream1->runtime->status->state) {
1568                 res = -EBADFD;
1569                 goto _end;
1570         }
1571         if (snd_pcm_stream_linked(substream1)) {
1572                 res = -EALREADY;
1573                 goto _end;
1574         }
1575         if (!snd_pcm_stream_linked(substream)) {
1576                 substream->group = kmalloc(sizeof(snd_pcm_group_t), GFP_ATOMIC);
1577                 if (substream->group == NULL) {
1578                         res = -ENOMEM;
1579                         goto _end;
1580                 }
1581                 spin_lock_init(&substream->group->lock);
1582                 INIT_LIST_HEAD(&substream->group->substreams);
1583                 list_add_tail(&substream->link_list, &substream->group->substreams);
1584                 substream->group->count = 1;
1585         }
1586         list_add_tail(&substream1->link_list, &substream->group->substreams);
1587         substream->group->count++;
1588         substream1->group = substream->group;
1589  _end:
1590         write_unlock_irq(&snd_pcm_link_rwlock);
1591         up_write(&snd_pcm_link_rwsem);
1592         fput(file);
1593         return res;
1594 }
1595
1596 static void relink_to_local(snd_pcm_substream_t *substream)
1597 {
1598         substream->group = &substream->self_group;
1599         INIT_LIST_HEAD(&substream->self_group.substreams);
1600         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1601 }
1602
1603 static int snd_pcm_unlink(snd_pcm_substream_t *substream)
1604 {
1605         struct list_head *pos;
1606         int res = 0;
1607
1608         down_write(&snd_pcm_link_rwsem);
1609         write_lock_irq(&snd_pcm_link_rwlock);
1610         if (!snd_pcm_stream_linked(substream)) {
1611                 res = -EALREADY;
1612                 goto _end;
1613         }
1614         list_del(&substream->link_list);
1615         substream->group->count--;
1616         if (substream->group->count == 1) {     /* detach the last stream, too */
1617                 snd_pcm_group_for_each(pos, substream) {
1618                         relink_to_local(snd_pcm_group_substream_entry(pos));
1619                         break;
1620                 }
1621                 kfree(substream->group);
1622         }
1623         relink_to_local(substream);
1624        _end:
1625         write_unlock_irq(&snd_pcm_link_rwlock);
1626         up_write(&snd_pcm_link_rwsem);
1627         return res;
1628 }
1629
1630 /*
1631  * hw configurator
1632  */
1633 static int snd_pcm_hw_rule_mul(snd_pcm_hw_params_t *params,
1634                                snd_pcm_hw_rule_t *rule)
1635 {
1636         snd_interval_t t;
1637         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1638                      hw_param_interval_c(params, rule->deps[1]), &t);
1639         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1640 }
1641
1642 static int snd_pcm_hw_rule_div(snd_pcm_hw_params_t *params,
1643                                snd_pcm_hw_rule_t *rule)
1644 {
1645         snd_interval_t t;
1646         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1647                      hw_param_interval_c(params, rule->deps[1]), &t);
1648         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1649 }
1650
1651 static int snd_pcm_hw_rule_muldivk(snd_pcm_hw_params_t *params,
1652                                    snd_pcm_hw_rule_t *rule)
1653 {
1654         snd_interval_t t;
1655         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1656                          hw_param_interval_c(params, rule->deps[1]),
1657                          (unsigned long) rule->private, &t);
1658         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1659 }
1660
1661 static int snd_pcm_hw_rule_mulkdiv(snd_pcm_hw_params_t *params,
1662                                    snd_pcm_hw_rule_t *rule)
1663 {
1664         snd_interval_t t;
1665         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1666                          (unsigned long) rule->private,
1667                          hw_param_interval_c(params, rule->deps[1]), &t);
1668         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1669 }
1670
1671 static int snd_pcm_hw_rule_format(snd_pcm_hw_params_t *params,
1672                                   snd_pcm_hw_rule_t *rule)
1673 {
1674         unsigned int k;
1675         snd_interval_t *i = hw_param_interval(params, rule->deps[0]);
1676         snd_mask_t m;
1677         snd_mask_t *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1678         snd_mask_any(&m);
1679         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1680                 int bits;
1681                 if (! snd_mask_test(mask, k))
1682                         continue;
1683                 bits = snd_pcm_format_physical_width(k);
1684                 if (bits <= 0)
1685                         continue; /* ignore invalid formats */
1686                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1687                         snd_mask_reset(&m, k);
1688         }
1689         return snd_mask_refine(mask, &m);
1690 }
1691
1692 static int snd_pcm_hw_rule_sample_bits(snd_pcm_hw_params_t *params,
1693                                        snd_pcm_hw_rule_t *rule)
1694 {
1695         snd_interval_t t;
1696         unsigned int k;
1697         t.min = UINT_MAX;
1698         t.max = 0;
1699         t.openmin = 0;
1700         t.openmax = 0;
1701         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1702                 int bits;
1703                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1704                         continue;
1705                 bits = snd_pcm_format_physical_width(k);
1706                 if (bits <= 0)
1707                         continue; /* ignore invalid formats */
1708                 if (t.min > (unsigned)bits)
1709                         t.min = bits;
1710                 if (t.max < (unsigned)bits)
1711                         t.max = bits;
1712         }
1713         t.integer = 1;
1714         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1715 }
1716
1717 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1718 #error "Change this table"
1719 #endif
1720
1721 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1722                                  48000, 64000, 88200, 96000, 176400, 192000 };
1723
1724 static int snd_pcm_hw_rule_rate(snd_pcm_hw_params_t *params,
1725                                 snd_pcm_hw_rule_t *rule)
1726 {
1727         snd_pcm_hardware_t *hw = rule->private;
1728         return snd_interval_list(hw_param_interval(params, rule->var),
1729                                  ARRAY_SIZE(rates), rates, hw->rates);
1730 }               
1731
1732 static int snd_pcm_hw_rule_buffer_bytes_max(snd_pcm_hw_params_t *params,
1733                                             snd_pcm_hw_rule_t *rule)
1734 {
1735         snd_interval_t t;
1736         snd_pcm_substream_t *substream = rule->private;
1737         t.min = 0;
1738         t.max = substream->buffer_bytes_max;
1739         t.openmin = 0;
1740         t.openmax = 0;
1741         t.integer = 1;
1742         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1743 }               
1744
1745 int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream)
1746 {
1747         snd_pcm_runtime_t *runtime = substream->runtime;
1748         snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints;
1749         int k, err;
1750
1751         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1752                 snd_mask_any(constrs_mask(constrs, k));
1753         }
1754
1755         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1756                 snd_interval_any(constrs_interval(constrs, k));
1757         }
1758
1759         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1760         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1761         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1762         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1763         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1764
1765         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1766                                    snd_pcm_hw_rule_format, NULL,
1767                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1768         if (err < 0)
1769                 return err;
1770         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1771                                   snd_pcm_hw_rule_sample_bits, NULL,
1772                                   SNDRV_PCM_HW_PARAM_FORMAT, 
1773                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1774         if (err < 0)
1775                 return err;
1776         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1777                                   snd_pcm_hw_rule_div, NULL,
1778                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1779         if (err < 0)
1780                 return err;
1781         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1782                                   snd_pcm_hw_rule_mul, NULL,
1783                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1784         if (err < 0)
1785                 return err;
1786         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1787                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1788                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1789         if (err < 0)
1790                 return err;
1791         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1792                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1793                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1794         if (err < 0)
1795                 return err;
1796         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 
1797                                   snd_pcm_hw_rule_div, NULL,
1798                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1799         if (err < 0)
1800                 return err;
1801         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1802                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1803                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1804         if (err < 0)
1805                 return err;
1806         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1807                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1808                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1809         if (err < 0)
1810                 return err;
1811         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 
1812                                   snd_pcm_hw_rule_div, NULL,
1813                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1814         if (err < 0)
1815                 return err;
1816         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1817                                   snd_pcm_hw_rule_div, NULL,
1818                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1819         if (err < 0)
1820                 return err;
1821         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1822                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1823                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1824         if (err < 0)
1825                 return err;
1826         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1827                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1828                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1829         if (err < 0)
1830                 return err;
1831         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1832                                   snd_pcm_hw_rule_mul, NULL,
1833                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1834         if (err < 0)
1835                 return err;
1836         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1837                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1838                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1839         if (err < 0)
1840                 return err;
1841         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1842                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1843                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1844         if (err < 0)
1845                 return err;
1846         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 
1847                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1848                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1849         if (err < 0)
1850                 return err;
1851         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
1852                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1853                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1854         if (err < 0)
1855                 return err;
1856         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 
1857                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1858                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1859         if (err < 0)
1860                 return err;
1861         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 
1862                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1863                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1864         if (err < 0)
1865                 return err;
1866         return 0;
1867 }
1868
1869 int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream)
1870 {
1871         snd_pcm_runtime_t *runtime = substream->runtime;
1872         snd_pcm_hardware_t *hw = &runtime->hw;
1873         int err;
1874         unsigned int mask = 0;
1875
1876         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1877                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1878         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1879                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1880         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1881                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1882                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1883                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1884                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1885                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1886                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1887         }
1888         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1889         snd_assert(err >= 0, return -EINVAL);
1890
1891         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1892         snd_assert(err >= 0, return -EINVAL);
1893
1894         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1895         snd_assert(err >= 0, return -EINVAL);
1896
1897         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1898                                            hw->channels_min, hw->channels_max);
1899         snd_assert(err >= 0, return -EINVAL);
1900
1901         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1902                                            hw->rate_min, hw->rate_max);
1903         snd_assert(err >= 0, return -EINVAL);
1904
1905         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1906                                            hw->period_bytes_min, hw->period_bytes_max);
1907         snd_assert(err >= 0, return -EINVAL);
1908
1909         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1910                                            hw->periods_min, hw->periods_max);
1911         snd_assert(err >= 0, return -EINVAL);
1912
1913         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1914                                            hw->period_bytes_min, hw->buffer_bytes_max);
1915         snd_assert(err >= 0, return -EINVAL);
1916
1917         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
1918                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1919                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1920         if (err < 0)
1921                 return err;
1922
1923         /* FIXME: remove */
1924         if (runtime->dma_bytes) {
1925                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1926                 snd_assert(err >= 0, return -EINVAL);
1927         }
1928
1929         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1930                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1931                                           snd_pcm_hw_rule_rate, hw,
1932                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1933                 if (err < 0)
1934                         return err;
1935         }
1936
1937         /* FIXME: this belong to lowlevel */
1938         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
1939                                      1000000 / HZ, 1000000 / HZ);
1940         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1941
1942         return 0;
1943 }
1944
1945 static void snd_pcm_add_file(snd_pcm_str_t *str,
1946                              snd_pcm_file_t *pcm_file)
1947 {
1948         pcm_file->next = str->files;
1949         str->files = pcm_file;
1950 }
1951
1952 static void snd_pcm_remove_file(snd_pcm_str_t *str,
1953                                 snd_pcm_file_t *pcm_file)
1954 {
1955         snd_pcm_file_t * pcm_file1;
1956         if (str->files == pcm_file) {
1957                 str->files = pcm_file->next;
1958         } else {
1959                 pcm_file1 = str->files;
1960                 while (pcm_file1 && pcm_file1->next != pcm_file)
1961                         pcm_file1 = pcm_file1->next;
1962                 if (pcm_file1 != NULL)
1963                         pcm_file1->next = pcm_file->next;
1964         }
1965 }
1966
1967 static int snd_pcm_release_file(snd_pcm_file_t * pcm_file)
1968 {
1969         snd_pcm_substream_t *substream;
1970         snd_pcm_runtime_t *runtime;
1971         snd_pcm_str_t * str;
1972
1973         snd_assert(pcm_file != NULL, return -ENXIO);
1974         substream = pcm_file->substream;
1975         snd_assert(substream != NULL, return -ENXIO);
1976         runtime = substream->runtime;
1977         str = substream->pstr;
1978         snd_pcm_unlink(substream);
1979         if (substream->ffile != NULL) {
1980                 if (substream->ops->hw_free != NULL)
1981                         substream->ops->hw_free(substream);
1982                 substream->ops->close(substream);
1983                 substream->ffile = NULL;
1984         }
1985         snd_pcm_remove_file(str, pcm_file);
1986         snd_pcm_release_substream(substream);
1987         kfree(pcm_file);
1988         return 0;
1989 }
1990
1991 static int snd_pcm_open_file(struct file *file,
1992                              snd_pcm_t *pcm,
1993                              int stream,
1994                              snd_pcm_file_t **rpcm_file)
1995 {
1996         int err = 0;
1997         snd_pcm_file_t *pcm_file;
1998         snd_pcm_substream_t *substream;
1999         snd_pcm_str_t *str;
2000
2001         snd_assert(rpcm_file != NULL, return -EINVAL);
2002         *rpcm_file = NULL;
2003
2004         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2005         if (pcm_file == NULL) {
2006                 return -ENOMEM;
2007         }
2008
2009         if ((err = snd_pcm_open_substream(pcm, stream, &substream)) < 0) {
2010                 kfree(pcm_file);
2011                 return err;
2012         }
2013
2014         str = substream->pstr;
2015         substream->file = pcm_file;
2016         substream->no_mmap_ctrl = 0;
2017
2018         pcm_file->substream = substream;
2019
2020         snd_pcm_add_file(str, pcm_file);
2021
2022         err = snd_pcm_hw_constraints_init(substream);
2023         if (err < 0) {
2024                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2025                 snd_pcm_release_file(pcm_file);
2026                 return err;
2027         }
2028
2029         if ((err = substream->ops->open(substream)) < 0) {
2030                 snd_pcm_release_file(pcm_file);
2031                 return err;
2032         }
2033         substream->ffile = file;
2034
2035         err = snd_pcm_hw_constraints_complete(substream);
2036         if (err < 0) {
2037                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2038                 snd_pcm_release_file(pcm_file);
2039                 return err;
2040         }
2041
2042         file->private_data = pcm_file;
2043         *rpcm_file = pcm_file;
2044         return 0;
2045 }
2046
2047 static int snd_pcm_open(struct inode *inode, struct file *file)
2048 {
2049         int cardnum = SNDRV_MINOR_CARD(iminor(inode));
2050         int device = SNDRV_MINOR_DEVICE(iminor(inode));
2051         int err;
2052         snd_pcm_t *pcm;
2053         snd_pcm_file_t *pcm_file;
2054         wait_queue_t wait;
2055
2056         if (device < SNDRV_MINOR_PCM_PLAYBACK || device >= SNDRV_MINOR_DEVICES)
2057                 return -ENXIO;
2058         pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + (device % SNDRV_MINOR_PCMS)];
2059         if (pcm == NULL) {
2060                 err = -ENODEV;
2061                 goto __error1;
2062         }
2063         err = snd_card_file_add(pcm->card, file);
2064         if (err < 0)
2065                 goto __error1;
2066         if (!try_module_get(pcm->card->module)) {
2067                 err = -EFAULT;
2068                 goto __error2;
2069         }
2070         init_waitqueue_entry(&wait, current);
2071         add_wait_queue(&pcm->open_wait, &wait);
2072         down(&pcm->open_mutex);
2073         while (1) {
2074                 err = snd_pcm_open_file(file, pcm, device >= SNDRV_MINOR_PCM_CAPTURE ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, &pcm_file);
2075                 if (err >= 0)
2076                         break;
2077                 if (err == -EAGAIN) {
2078                         if (file->f_flags & O_NONBLOCK) {
2079                                 err = -EBUSY;
2080                                 break;
2081                         }
2082                 } else
2083                         break;
2084                 set_current_state(TASK_INTERRUPTIBLE);
2085                 up(&pcm->open_mutex);
2086                 schedule();
2087                 down(&pcm->open_mutex);
2088                 if (signal_pending(current)) {
2089                         err = -ERESTARTSYS;
2090                         break;
2091                 }
2092         }
2093         remove_wait_queue(&pcm->open_wait, &wait);
2094         up(&pcm->open_mutex);
2095         if (err < 0)
2096                 goto __error;
2097         return err;
2098
2099       __error:
2100         module_put(pcm->card->module);
2101       __error2:
2102         snd_card_file_remove(pcm->card, file);
2103       __error1:
2104         return err;
2105 }
2106
2107 static int snd_pcm_release(struct inode *inode, struct file *file)
2108 {
2109         snd_pcm_t *pcm;
2110         snd_pcm_substream_t *substream;
2111         snd_pcm_file_t *pcm_file;
2112
2113         pcm_file = file->private_data;
2114         substream = pcm_file->substream;
2115         snd_assert(substream != NULL, return -ENXIO);
2116         snd_assert(!atomic_read(&substream->runtime->mmap_count), );
2117         pcm = substream->pcm;
2118         snd_pcm_drop(substream);
2119         fasync_helper(-1, file, 0, &substream->runtime->fasync);
2120         down(&pcm->open_mutex);
2121         snd_pcm_release_file(pcm_file);
2122         up(&pcm->open_mutex);
2123         wake_up(&pcm->open_wait);
2124         module_put(pcm->card->module);
2125         snd_card_file_remove(pcm->card, file);
2126         return 0;
2127 }
2128
2129 static snd_pcm_sframes_t snd_pcm_playback_rewind(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2130 {
2131         snd_pcm_runtime_t *runtime = substream->runtime;
2132         snd_pcm_sframes_t appl_ptr;
2133         snd_pcm_sframes_t ret;
2134         snd_pcm_sframes_t hw_avail;
2135
2136         if (frames == 0)
2137                 return 0;
2138
2139         snd_pcm_stream_lock_irq(substream);
2140         switch (runtime->status->state) {
2141         case SNDRV_PCM_STATE_PREPARED:
2142                 break;
2143         case SNDRV_PCM_STATE_DRAINING:
2144         case SNDRV_PCM_STATE_RUNNING:
2145                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2146                         break;
2147                 /* Fall through */
2148         case SNDRV_PCM_STATE_XRUN:
2149                 ret = -EPIPE;
2150                 goto __end;
2151         default:
2152                 ret = -EBADFD;
2153                 goto __end;
2154         }
2155
2156         hw_avail = snd_pcm_playback_hw_avail(runtime);
2157         if (hw_avail <= 0) {
2158                 ret = 0;
2159                 goto __end;
2160         }
2161         if (frames > (snd_pcm_uframes_t)hw_avail)
2162                 frames = hw_avail;
2163         else
2164                 frames -= frames % runtime->xfer_align;
2165         appl_ptr = runtime->control->appl_ptr - frames;
2166         if (appl_ptr < 0)
2167                 appl_ptr += runtime->boundary;
2168         runtime->control->appl_ptr = appl_ptr;
2169         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2170             runtime->sleep_min)
2171                 snd_pcm_tick_prepare(substream);
2172         ret = frames;
2173  __end:
2174         snd_pcm_stream_unlock_irq(substream);
2175         return ret;
2176 }
2177
2178 static snd_pcm_sframes_t snd_pcm_capture_rewind(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2179 {
2180         snd_pcm_runtime_t *runtime = substream->runtime;
2181         snd_pcm_sframes_t appl_ptr;
2182         snd_pcm_sframes_t ret;
2183         snd_pcm_sframes_t hw_avail;
2184
2185         if (frames == 0)
2186                 return 0;
2187
2188         snd_pcm_stream_lock_irq(substream);
2189         switch (runtime->status->state) {
2190         case SNDRV_PCM_STATE_PREPARED:
2191         case SNDRV_PCM_STATE_DRAINING:
2192                 break;
2193         case SNDRV_PCM_STATE_RUNNING:
2194                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2195                         break;
2196                 /* Fall through */
2197         case SNDRV_PCM_STATE_XRUN:
2198                 ret = -EPIPE;
2199                 goto __end;
2200         default:
2201                 ret = -EBADFD;
2202                 goto __end;
2203         }
2204
2205         hw_avail = snd_pcm_capture_hw_avail(runtime);
2206         if (hw_avail <= 0) {
2207                 ret = 0;
2208                 goto __end;
2209         }
2210         if (frames > (snd_pcm_uframes_t)hw_avail)
2211                 frames = hw_avail;
2212         else
2213                 frames -= frames % runtime->xfer_align;
2214         appl_ptr = runtime->control->appl_ptr - frames;
2215         if (appl_ptr < 0)
2216                 appl_ptr += runtime->boundary;
2217         runtime->control->appl_ptr = appl_ptr;
2218         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2219             runtime->sleep_min)
2220                 snd_pcm_tick_prepare(substream);
2221         ret = frames;
2222  __end:
2223         snd_pcm_stream_unlock_irq(substream);
2224         return ret;
2225 }
2226
2227 static snd_pcm_sframes_t snd_pcm_playback_forward(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2228 {
2229         snd_pcm_runtime_t *runtime = substream->runtime;
2230         snd_pcm_sframes_t appl_ptr;
2231         snd_pcm_sframes_t ret;
2232         snd_pcm_sframes_t avail;
2233
2234         if (frames == 0)
2235                 return 0;
2236
2237         snd_pcm_stream_lock_irq(substream);
2238         switch (runtime->status->state) {
2239         case SNDRV_PCM_STATE_PREPARED:
2240         case SNDRV_PCM_STATE_PAUSED:
2241                 break;
2242         case SNDRV_PCM_STATE_DRAINING:
2243         case SNDRV_PCM_STATE_RUNNING:
2244                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2245                         break;
2246                 /* Fall through */
2247         case SNDRV_PCM_STATE_XRUN:
2248                 ret = -EPIPE;
2249                 goto __end;
2250         default:
2251                 ret = -EBADFD;
2252                 goto __end;
2253         }
2254
2255         avail = snd_pcm_playback_avail(runtime);
2256         if (avail <= 0) {
2257                 ret = 0;
2258                 goto __end;
2259         }
2260         if (frames > (snd_pcm_uframes_t)avail)
2261                 frames = avail;
2262         else
2263                 frames -= frames % runtime->xfer_align;
2264         appl_ptr = runtime->control->appl_ptr + frames;
2265         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2266                 appl_ptr -= runtime->boundary;
2267         runtime->control->appl_ptr = appl_ptr;
2268         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2269             runtime->sleep_min)
2270                 snd_pcm_tick_prepare(substream);
2271         ret = frames;
2272  __end:
2273         snd_pcm_stream_unlock_irq(substream);
2274         return ret;
2275 }
2276
2277 static snd_pcm_sframes_t snd_pcm_capture_forward(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2278 {
2279         snd_pcm_runtime_t *runtime = substream->runtime;
2280         snd_pcm_sframes_t appl_ptr;
2281         snd_pcm_sframes_t ret;
2282         snd_pcm_sframes_t avail;
2283
2284         if (frames == 0)
2285                 return 0;
2286
2287         snd_pcm_stream_lock_irq(substream);
2288         switch (runtime->status->state) {
2289         case SNDRV_PCM_STATE_PREPARED:
2290         case SNDRV_PCM_STATE_DRAINING:
2291         case SNDRV_PCM_STATE_PAUSED:
2292                 break;
2293         case SNDRV_PCM_STATE_RUNNING:
2294                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2295                         break;
2296                 /* Fall through */
2297         case SNDRV_PCM_STATE_XRUN:
2298                 ret = -EPIPE;
2299                 goto __end;
2300         default:
2301                 ret = -EBADFD;
2302                 goto __end;
2303         }
2304
2305         avail = snd_pcm_capture_avail(runtime);
2306         if (avail <= 0) {
2307                 ret = 0;
2308                 goto __end;
2309         }
2310         if (frames > (snd_pcm_uframes_t)avail)
2311                 frames = avail;
2312         else
2313                 frames -= frames % runtime->xfer_align;
2314         appl_ptr = runtime->control->appl_ptr + frames;
2315         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2316                 appl_ptr -= runtime->boundary;
2317         runtime->control->appl_ptr = appl_ptr;
2318         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2319             runtime->sleep_min)
2320                 snd_pcm_tick_prepare(substream);
2321         ret = frames;
2322  __end:
2323         snd_pcm_stream_unlock_irq(substream);
2324         return ret;
2325 }
2326
2327 static int snd_pcm_hwsync(snd_pcm_substream_t *substream)
2328 {
2329         snd_pcm_runtime_t *runtime = substream->runtime;
2330         int err;
2331
2332         snd_pcm_stream_lock_irq(substream);
2333         switch (runtime->status->state) {
2334         case SNDRV_PCM_STATE_DRAINING:
2335                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2336                         goto __badfd;
2337         case SNDRV_PCM_STATE_RUNNING:
2338                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2339                         break;
2340                 /* Fall through */
2341         case SNDRV_PCM_STATE_PREPARED:
2342         case SNDRV_PCM_STATE_SUSPENDED:
2343                 err = 0;
2344                 break;
2345         case SNDRV_PCM_STATE_XRUN:
2346                 err = -EPIPE;
2347                 break;
2348         default:
2349               __badfd:
2350                 err = -EBADFD;
2351                 break;
2352         }
2353         snd_pcm_stream_unlock_irq(substream);
2354         return err;
2355 }
2356                 
2357 static int snd_pcm_delay(snd_pcm_substream_t *substream, snd_pcm_sframes_t __user *res)
2358 {
2359         snd_pcm_runtime_t *runtime = substream->runtime;
2360         int err;
2361         snd_pcm_sframes_t n = 0;
2362
2363         snd_pcm_stream_lock_irq(substream);
2364         switch (runtime->status->state) {
2365         case SNDRV_PCM_STATE_DRAINING:
2366                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2367                         goto __badfd;
2368         case SNDRV_PCM_STATE_RUNNING:
2369                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2370                         break;
2371                 /* Fall through */
2372         case SNDRV_PCM_STATE_PREPARED:
2373         case SNDRV_PCM_STATE_SUSPENDED:
2374                 err = 0;
2375                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2376                         n = snd_pcm_playback_hw_avail(runtime);
2377                 else
2378                         n = snd_pcm_capture_avail(runtime);
2379                 break;
2380         case SNDRV_PCM_STATE_XRUN:
2381                 err = -EPIPE;
2382                 break;
2383         default:
2384               __badfd:
2385                 err = -EBADFD;
2386                 break;
2387         }
2388         snd_pcm_stream_unlock_irq(substream);
2389         if (!err)
2390                 if (put_user(n, res))
2391                         err = -EFAULT;
2392         return err;
2393 }
2394                 
2395 static int snd_pcm_sync_ptr(snd_pcm_substream_t *substream, struct sndrv_pcm_sync_ptr __user *_sync_ptr)
2396 {
2397         snd_pcm_runtime_t *runtime = substream->runtime;
2398         struct sndrv_pcm_sync_ptr sync_ptr;
2399         volatile struct sndrv_pcm_mmap_status *status;
2400         volatile struct sndrv_pcm_mmap_control *control;
2401         int err;
2402
2403         memset(&sync_ptr, 0, sizeof(sync_ptr));
2404         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2405                 return -EFAULT;
2406         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct sndrv_pcm_mmap_control)))
2407                 return -EFAULT; 
2408         status = runtime->status;
2409         control = runtime->control;
2410         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2411                 err = snd_pcm_hwsync(substream);
2412                 if (err < 0)
2413                         return err;
2414         }
2415         snd_pcm_stream_lock_irq(substream);
2416         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2417                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2418         else
2419                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2420         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2421                 control->avail_min = sync_ptr.c.control.avail_min;
2422         else
2423                 sync_ptr.c.control.avail_min = control->avail_min;
2424         sync_ptr.s.status.state = status->state;
2425         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2426         sync_ptr.s.status.tstamp = status->tstamp;
2427         sync_ptr.s.status.suspended_state = status->suspended_state;
2428         snd_pcm_stream_unlock_irq(substream);
2429         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2430                 return -EFAULT;
2431         return 0;
2432 }
2433                 
2434 static int snd_pcm_playback_ioctl1(snd_pcm_substream_t *substream,
2435                                    unsigned int cmd, void __user *arg);
2436 static int snd_pcm_capture_ioctl1(snd_pcm_substream_t *substream,
2437                                   unsigned int cmd, void __user *arg);
2438
2439 static int snd_pcm_common_ioctl1(snd_pcm_substream_t *substream,
2440                                  unsigned int cmd, void __user *arg)
2441 {
2442         snd_assert(substream != NULL, return -ENXIO);
2443
2444         switch (cmd) {
2445         case SNDRV_PCM_IOCTL_PVERSION:
2446                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2447         case SNDRV_PCM_IOCTL_INFO:
2448                 return snd_pcm_info_user(substream, arg);
2449         case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2450                 return 0;
2451         case SNDRV_PCM_IOCTL_HW_REFINE:
2452                 return snd_pcm_hw_refine_user(substream, arg);
2453         case SNDRV_PCM_IOCTL_HW_PARAMS:
2454                 return snd_pcm_hw_params_user(substream, arg);
2455         case SNDRV_PCM_IOCTL_HW_FREE:
2456                 return snd_pcm_hw_free(substream);
2457         case SNDRV_PCM_IOCTL_SW_PARAMS:
2458                 return snd_pcm_sw_params_user(substream, arg);
2459         case SNDRV_PCM_IOCTL_STATUS:
2460                 return snd_pcm_status_user(substream, arg);
2461         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2462                 return snd_pcm_channel_info_user(substream, arg);
2463         case SNDRV_PCM_IOCTL_PREPARE:
2464                 return snd_pcm_prepare(substream);
2465         case SNDRV_PCM_IOCTL_RESET:
2466                 return snd_pcm_reset(substream);
2467         case SNDRV_PCM_IOCTL_START:
2468                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2469         case SNDRV_PCM_IOCTL_LINK:
2470                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2471         case SNDRV_PCM_IOCTL_UNLINK:
2472                 return snd_pcm_unlink(substream);
2473         case SNDRV_PCM_IOCTL_RESUME:
2474                 return snd_pcm_resume(substream);
2475         case SNDRV_PCM_IOCTL_XRUN:
2476                 return snd_pcm_xrun(substream);
2477         case SNDRV_PCM_IOCTL_HWSYNC:
2478                 return snd_pcm_hwsync(substream);
2479         case SNDRV_PCM_IOCTL_DELAY:
2480                 return snd_pcm_delay(substream, arg);
2481         case SNDRV_PCM_IOCTL_SYNC_PTR:
2482                 return snd_pcm_sync_ptr(substream, arg);
2483         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2484                 return snd_pcm_hw_refine_old_user(substream, arg);
2485         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2486                 return snd_pcm_hw_params_old_user(substream, arg);
2487         case SNDRV_PCM_IOCTL_DRAIN:
2488                 return snd_pcm_drain(substream);
2489         case SNDRV_PCM_IOCTL_DROP:
2490                 return snd_pcm_drop(substream);
2491         }
2492         snd_printd("unknown ioctl = 0x%x\n", cmd);
2493         return -ENOTTY;
2494 }
2495
2496 static int snd_pcm_playback_ioctl1(snd_pcm_substream_t *substream,
2497                                    unsigned int cmd, void __user *arg)
2498 {
2499         snd_assert(substream != NULL, return -ENXIO);
2500         snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2501         switch (cmd) {
2502         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2503         {
2504                 snd_xferi_t xferi;
2505                 snd_xferi_t __user *_xferi = arg;
2506                 snd_pcm_runtime_t *runtime = substream->runtime;
2507                 snd_pcm_sframes_t result;
2508                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2509                         return -EBADFD;
2510                 if (put_user(0, &_xferi->result))
2511                         return -EFAULT;
2512                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2513                         return -EFAULT;
2514                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2515                 __put_user(result, &_xferi->result);
2516                 return result < 0 ? result : 0;
2517         }
2518         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2519         {
2520                 snd_xfern_t xfern;
2521                 snd_xfern_t __user *_xfern = arg;
2522                 snd_pcm_runtime_t *runtime = substream->runtime;
2523                 void __user **bufs;
2524                 snd_pcm_sframes_t result;
2525                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2526                         return -EBADFD;
2527                 if (runtime->channels > 128)
2528                         return -EINVAL;
2529                 if (put_user(0, &_xfern->result))
2530                         return -EFAULT;
2531                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2532                         return -EFAULT;
2533                 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2534                 if (bufs == NULL)
2535                         return -ENOMEM;
2536                 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2537                         kfree(bufs);
2538                         return -EFAULT;
2539                 }
2540                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2541                 kfree(bufs);
2542                 __put_user(result, &_xfern->result);
2543                 return result < 0 ? result : 0;
2544         }
2545         case SNDRV_PCM_IOCTL_REWIND:
2546         {
2547                 snd_pcm_uframes_t frames;
2548                 snd_pcm_uframes_t __user *_frames = arg;
2549                 snd_pcm_sframes_t result;
2550                 if (get_user(frames, _frames))
2551                         return -EFAULT;
2552                 if (put_user(0, _frames))
2553                         return -EFAULT;
2554                 result = snd_pcm_playback_rewind(substream, frames);
2555                 __put_user(result, _frames);
2556                 return result < 0 ? result : 0;
2557         }
2558         case SNDRV_PCM_IOCTL_FORWARD:
2559         {
2560                 snd_pcm_uframes_t frames;
2561                 snd_pcm_uframes_t __user *_frames = arg;
2562                 snd_pcm_sframes_t result;
2563                 if (get_user(frames, _frames))
2564                         return -EFAULT;
2565                 if (put_user(0, _frames))
2566                         return -EFAULT;
2567                 result = snd_pcm_playback_forward(substream, frames);
2568                 __put_user(result, _frames);
2569                 return result < 0 ? result : 0;
2570         }
2571         case SNDRV_PCM_IOCTL_PAUSE:
2572         {
2573                 int res;
2574                 snd_pcm_stream_lock_irq(substream);
2575                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2576                 snd_pcm_stream_unlock_irq(substream);
2577                 return res;
2578         }
2579         }
2580         return snd_pcm_common_ioctl1(substream, cmd, arg);
2581 }
2582
2583 static int snd_pcm_capture_ioctl1(snd_pcm_substream_t *substream,
2584                                   unsigned int cmd, void __user *arg)
2585 {
2586         snd_assert(substream != NULL, return -ENXIO);
2587         snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2588         switch (cmd) {
2589         case SNDRV_PCM_IOCTL_READI_FRAMES:
2590         {
2591                 snd_xferi_t xferi;
2592                 snd_xferi_t __user *_xferi = arg;
2593                 snd_pcm_runtime_t *runtime = substream->runtime;
2594                 snd_pcm_sframes_t result;
2595                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2596                         return -EBADFD;
2597                 if (put_user(0, &_xferi->result))
2598                         return -EFAULT;
2599                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2600                         return -EFAULT;
2601                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2602                 __put_user(result, &_xferi->result);
2603                 return result < 0 ? result : 0;
2604         }
2605         case SNDRV_PCM_IOCTL_READN_FRAMES:
2606         {
2607                 snd_xfern_t xfern;
2608                 snd_xfern_t __user *_xfern = arg;
2609                 snd_pcm_runtime_t *runtime = substream->runtime;
2610                 void *bufs;
2611                 snd_pcm_sframes_t result;
2612                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2613                         return -EBADFD;
2614                 if (runtime->channels > 128)
2615                         return -EINVAL;
2616                 if (put_user(0, &_xfern->result))
2617                         return -EFAULT;
2618                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2619                         return -EFAULT;
2620                 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2621                 if (bufs == NULL)
2622                         return -ENOMEM;
2623                 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2624                         kfree(bufs);
2625                         return -EFAULT;
2626                 }
2627                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2628                 kfree(bufs);
2629                 __put_user(result, &_xfern->result);
2630                 return result < 0 ? result : 0;
2631         }
2632         case SNDRV_PCM_IOCTL_REWIND:
2633         {
2634                 snd_pcm_uframes_t frames;
2635                 snd_pcm_uframes_t __user *_frames = arg;
2636                 snd_pcm_sframes_t result;
2637                 if (get_user(frames, _frames))
2638                         return -EFAULT;
2639                 if (put_user(0, _frames))
2640                         return -EFAULT;
2641                 result = snd_pcm_capture_rewind(substream, frames);
2642                 __put_user(result, _frames);
2643                 return result < 0 ? result : 0;
2644         }
2645         case SNDRV_PCM_IOCTL_FORWARD:
2646         {
2647                 snd_pcm_uframes_t frames;
2648                 snd_pcm_uframes_t __user *_frames = arg;
2649                 snd_pcm_sframes_t result;
2650                 if (get_user(frames, _frames))
2651                         return -EFAULT;
2652                 if (put_user(0, _frames))
2653                         return -EFAULT;
2654                 result = snd_pcm_capture_forward(substream, frames);
2655                 __put_user(result, _frames);
2656                 return result < 0 ? result : 0;
2657         }
2658         }
2659         return snd_pcm_common_ioctl1(substream, cmd, arg);
2660 }
2661
2662 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2663 {
2664         snd_pcm_file_t *pcm_file;
2665
2666         pcm_file = file->private_data;
2667
2668         if (((cmd >> 8) & 0xff) != 'A')
2669                 return -ENOTTY;
2670
2671         return snd_pcm_playback_ioctl1(pcm_file->substream, cmd, (void __user *)arg);
2672 }
2673
2674 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2675 {
2676         snd_pcm_file_t *pcm_file;
2677
2678         pcm_file = file->private_data;
2679
2680         if (((cmd >> 8) & 0xff) != 'A')
2681                 return -ENOTTY;
2682
2683         return snd_pcm_capture_ioctl1(pcm_file->substream, cmd, (void __user *)arg);
2684 }
2685
2686 int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream,
2687                                   unsigned int cmd, void *arg)
2688 {
2689         mm_segment_t fs;
2690         int result;
2691         
2692         fs = snd_enter_user();
2693         result = snd_pcm_playback_ioctl1(substream, cmd, (void __user *)arg);
2694         snd_leave_user(fs);
2695         return result;
2696 }
2697
2698 int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream,
2699                                  unsigned int cmd, void *arg)
2700 {
2701         mm_segment_t fs;
2702         int result;
2703         
2704         fs = snd_enter_user();
2705         result = snd_pcm_capture_ioctl1(substream, cmd, (void __user *)arg);
2706         snd_leave_user(fs);
2707         return result;
2708 }
2709
2710 int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream,
2711                          unsigned int cmd, void *arg)
2712 {
2713         switch (substream->stream) {
2714         case SNDRV_PCM_STREAM_PLAYBACK:
2715                 return snd_pcm_kernel_playback_ioctl(substream, cmd, arg);
2716         case SNDRV_PCM_STREAM_CAPTURE:
2717                 return snd_pcm_kernel_capture_ioctl(substream, cmd, arg);
2718         default:
2719                 return -EINVAL;
2720         }
2721 }
2722
2723 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, loff_t * offset)
2724 {
2725         snd_pcm_file_t *pcm_file;
2726         snd_pcm_substream_t *substream;
2727         snd_pcm_runtime_t *runtime;
2728         snd_pcm_sframes_t result;
2729
2730         pcm_file = file->private_data;
2731         substream = pcm_file->substream;
2732         snd_assert(substream != NULL, return -ENXIO);
2733         runtime = substream->runtime;
2734         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2735                 return -EBADFD;
2736         if (!frame_aligned(runtime, count))
2737                 return -EINVAL;
2738         count = bytes_to_frames(runtime, count);
2739         result = snd_pcm_lib_read(substream, buf, count);
2740         if (result > 0)
2741                 result = frames_to_bytes(runtime, result);
2742         return result;
2743 }
2744
2745 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, size_t count, loff_t * offset)
2746 {
2747         snd_pcm_file_t *pcm_file;
2748         snd_pcm_substream_t *substream;
2749         snd_pcm_runtime_t *runtime;
2750         snd_pcm_sframes_t result;
2751
2752         pcm_file = file->private_data;
2753         substream = pcm_file->substream;
2754         snd_assert(substream != NULL, result = -ENXIO; goto end);
2755         runtime = substream->runtime;
2756         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2757                 result = -EBADFD;
2758                 goto end;
2759         }
2760         if (!frame_aligned(runtime, count)) {
2761                 result = -EINVAL;
2762                 goto end;
2763         }
2764         count = bytes_to_frames(runtime, count);
2765         result = snd_pcm_lib_write(substream, buf, count);
2766         if (result > 0)
2767                 result = frames_to_bytes(runtime, result);
2768  end:
2769         return result;
2770 }
2771
2772 static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector,
2773                              unsigned long count, loff_t * offset)
2774
2775 {
2776         snd_pcm_file_t *pcm_file;
2777         snd_pcm_substream_t *substream;
2778         snd_pcm_runtime_t *runtime;
2779         snd_pcm_sframes_t result;
2780         unsigned long i;
2781         void __user **bufs;
2782         snd_pcm_uframes_t frames;
2783
2784         pcm_file = file->private_data;
2785         substream = pcm_file->substream;
2786         snd_assert(substream != NULL, return -ENXIO);
2787         runtime = substream->runtime;
2788         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2789                 return -EBADFD;
2790         if (count > 1024 || count != runtime->channels)
2791                 return -EINVAL;
2792         if (!frame_aligned(runtime, _vector->iov_len))
2793                 return -EINVAL;
2794         frames = bytes_to_samples(runtime, _vector->iov_len);
2795         bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2796         if (bufs == NULL)
2797                 return -ENOMEM;
2798         for (i = 0; i < count; ++i)
2799                 bufs[i] = _vector[i].iov_base;
2800         result = snd_pcm_lib_readv(substream, bufs, frames);
2801         if (result > 0)
2802                 result = frames_to_bytes(runtime, result);
2803         kfree(bufs);
2804         return result;
2805 }
2806
2807 static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector,
2808                               unsigned long count, loff_t * offset)
2809 {
2810         snd_pcm_file_t *pcm_file;
2811         snd_pcm_substream_t *substream;
2812         snd_pcm_runtime_t *runtime;
2813         snd_pcm_sframes_t result;
2814         unsigned long i;
2815         void __user **bufs;
2816         snd_pcm_uframes_t frames;
2817
2818         pcm_file = file->private_data;
2819         substream = pcm_file->substream;
2820         snd_assert(substream != NULL, result = -ENXIO; goto end);
2821         runtime = substream->runtime;
2822         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2823                 result = -EBADFD;
2824                 goto end;
2825         }
2826         if (count > 128 || count != runtime->channels ||
2827             !frame_aligned(runtime, _vector->iov_len)) {
2828                 result = -EINVAL;
2829                 goto end;
2830         }
2831         frames = bytes_to_samples(runtime, _vector->iov_len);
2832         bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2833         if (bufs == NULL)
2834                 return -ENOMEM;
2835         for (i = 0; i < count; ++i)
2836                 bufs[i] = _vector[i].iov_base;
2837         result = snd_pcm_lib_writev(substream, bufs, frames);
2838         if (result > 0)
2839                 result = frames_to_bytes(runtime, result);
2840         kfree(bufs);
2841  end:
2842         return result;
2843 }
2844
2845 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2846 {
2847         snd_pcm_file_t *pcm_file;
2848         snd_pcm_substream_t *substream;
2849         snd_pcm_runtime_t *runtime;
2850         unsigned int mask;
2851         snd_pcm_uframes_t avail;
2852
2853         pcm_file = file->private_data;
2854
2855         substream = pcm_file->substream;
2856         snd_assert(substream != NULL, return -ENXIO);
2857         runtime = substream->runtime;
2858
2859         poll_wait(file, &runtime->sleep, wait);
2860
2861         snd_pcm_stream_lock_irq(substream);
2862         avail = snd_pcm_playback_avail(runtime);
2863         switch (runtime->status->state) {
2864         case SNDRV_PCM_STATE_RUNNING:
2865         case SNDRV_PCM_STATE_PREPARED:
2866         case SNDRV_PCM_STATE_PAUSED:
2867                 if (avail >= runtime->control->avail_min) {
2868                         mask = POLLOUT | POLLWRNORM;
2869                         break;
2870                 }
2871                 /* Fall through */
2872         case SNDRV_PCM_STATE_DRAINING:
2873                 mask = 0;
2874                 break;
2875         default:
2876                 mask = POLLOUT | POLLWRNORM | POLLERR;
2877                 break;
2878         }
2879         snd_pcm_stream_unlock_irq(substream);
2880         return mask;
2881 }
2882
2883 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2884 {
2885         snd_pcm_file_t *pcm_file;
2886         snd_pcm_substream_t *substream;
2887         snd_pcm_runtime_t *runtime;
2888         unsigned int mask;
2889         snd_pcm_uframes_t avail;
2890
2891         pcm_file = file->private_data;
2892
2893         substream = pcm_file->substream;
2894         snd_assert(substream != NULL, return -ENXIO);
2895         runtime = substream->runtime;
2896
2897         poll_wait(file, &runtime->sleep, wait);
2898
2899         snd_pcm_stream_lock_irq(substream);
2900         avail = snd_pcm_capture_avail(runtime);
2901         switch (runtime->status->state) {
2902         case SNDRV_PCM_STATE_RUNNING:
2903         case SNDRV_PCM_STATE_PREPARED:
2904         case SNDRV_PCM_STATE_PAUSED:
2905                 if (avail >= runtime->control->avail_min) {
2906                         mask = POLLIN | POLLRDNORM;
2907                         break;
2908                 }
2909                 mask = 0;
2910                 break;
2911         case SNDRV_PCM_STATE_DRAINING:
2912                 if (avail > 0) {
2913                         mask = POLLIN | POLLRDNORM;
2914                         break;
2915                 }
2916                 /* Fall through */
2917         default:
2918                 mask = POLLIN | POLLRDNORM | POLLERR;
2919                 break;
2920         }
2921         snd_pcm_stream_unlock_irq(substream);
2922         return mask;
2923 }
2924
2925 /*
2926  * mmap support
2927  */
2928
2929 /*
2930  * Only on coherent architectures, we can mmap the status and the control records
2931  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
2932  */
2933 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2934 /*
2935  * mmap status record
2936  */
2937 static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area, unsigned long address, int *type)
2938 {
2939         snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
2940         snd_pcm_runtime_t *runtime;
2941         struct page * page;
2942         
2943         if (substream == NULL)
2944                 return NOPAGE_OOM;
2945         runtime = substream->runtime;
2946         page = virt_to_page(runtime->status);
2947         get_page(page);
2948         if (type)
2949                 *type = VM_FAULT_MINOR;
2950         return page;
2951 }
2952
2953 static struct vm_operations_struct snd_pcm_vm_ops_status =
2954 {
2955         .nopage =       snd_pcm_mmap_status_nopage,
2956 };
2957
2958 static int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file,
2959                                struct vm_area_struct *area)
2960 {
2961         snd_pcm_runtime_t *runtime;
2962         long size;
2963         if (!(area->vm_flags & VM_READ))
2964                 return -EINVAL;
2965         runtime = substream->runtime;
2966         snd_assert(runtime != NULL, return -EAGAIN);
2967         size = area->vm_end - area->vm_start;
2968         if (size != PAGE_ALIGN(sizeof(snd_pcm_mmap_status_t)))
2969                 return -EINVAL;
2970         area->vm_ops = &snd_pcm_vm_ops_status;
2971         area->vm_private_data = substream;
2972         area->vm_flags |= VM_RESERVED;
2973         return 0;
2974 }
2975
2976 /*
2977  * mmap control record
2978  */
2979 static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area, unsigned long address, int *type)
2980 {
2981         snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
2982         snd_pcm_runtime_t *runtime;
2983         struct page * page;
2984         
2985         if (substream == NULL)
2986                 return NOPAGE_OOM;
2987         runtime = substream->runtime;
2988         page = virt_to_page(runtime->control);
2989         get_page(page);
2990         if (type)
2991                 *type = VM_FAULT_MINOR;
2992         return page;
2993 }
2994
2995 static struct vm_operations_struct snd_pcm_vm_ops_control =
2996 {
2997         .nopage =       snd_pcm_mmap_control_nopage,
2998 };
2999
3000 static int snd_pcm_mmap_control(snd_pcm_substream_t *substream, struct file *file,
3001                                 struct vm_area_struct *area)
3002 {
3003         snd_pcm_runtime_t *runtime;
3004         long size;
3005         if (!(area->vm_flags & VM_READ))
3006                 return -EINVAL;
3007         runtime = substream->runtime;
3008         snd_assert(runtime != NULL, return -EAGAIN);
3009         size = area->vm_end - area->vm_start;
3010         if (size != PAGE_ALIGN(sizeof(snd_pcm_mmap_control_t)))
3011                 return -EINVAL;
3012         area->vm_ops = &snd_pcm_vm_ops_control;
3013         area->vm_private_data = substream;
3014         area->vm_flags |= VM_RESERVED;
3015         return 0;
3016 }
3017 #else /* ! coherent mmap */
3018 /*
3019  * don't support mmap for status and control records.
3020  */
3021 static int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file,
3022                                struct vm_area_struct *area)
3023 {
3024         return -ENXIO;
3025 }
3026 static int snd_pcm_mmap_control(snd_pcm_substream_t *substream, struct file *file,
3027                                 struct vm_area_struct *area)
3028 {
3029         return -ENXIO;
3030 }
3031 #endif /* coherent mmap */
3032
3033 /*
3034  * nopage callback for mmapping a RAM page
3035  */
3036 static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area, unsigned long address, int *type)
3037 {
3038         snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
3039         snd_pcm_runtime_t *runtime;
3040         unsigned long offset;
3041         struct page * page;
3042         void *vaddr;
3043         size_t dma_bytes;
3044         
3045         if (substream == NULL)
3046                 return NOPAGE_OOM;
3047         runtime = substream->runtime;
3048         offset = area->vm_pgoff << PAGE_SHIFT;
3049         offset += address - area->vm_start;
3050         snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
3051         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3052         if (offset > dma_bytes - PAGE_SIZE)
3053                 return NOPAGE_SIGBUS;
3054         if (substream->ops->page) {
3055                 page = substream->ops->page(substream, offset);
3056                 if (! page)
3057                         return NOPAGE_OOM;
3058         } else {
3059                 vaddr = runtime->dma_area + offset;
3060                 page = virt_to_page(vaddr);
3061         }
3062         get_page(page);
3063         if (type)
3064                 *type = VM_FAULT_MINOR;
3065         return page;
3066 }
3067
3068 static struct vm_operations_struct snd_pcm_vm_ops_data =
3069 {
3070         .open =         snd_pcm_mmap_data_open,
3071         .close =        snd_pcm_mmap_data_close,
3072         .nopage =       snd_pcm_mmap_data_nopage,
3073 };
3074
3075 /*
3076  * mmap the DMA buffer on RAM
3077  */
3078 static int snd_pcm_default_mmap(snd_pcm_substream_t *substream, struct vm_area_struct *area)
3079 {
3080         area->vm_ops = &snd_pcm_vm_ops_data;
3081         area->vm_private_data = substream;
3082         area->vm_flags |= VM_RESERVED;
3083         atomic_inc(&substream->runtime->mmap_count);
3084         return 0;
3085 }
3086
3087 /*
3088  * mmap the DMA buffer on I/O memory area
3089  */
3090 #if SNDRV_PCM_INFO_MMAP_IOMEM
3091 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3092 {
3093         .open =         snd_pcm_mmap_data_open,
3094         .close =        snd_pcm_mmap_data_close,
3095 };
3096
3097 int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area)
3098 {
3099         long size;
3100         unsigned long offset;
3101
3102 #ifdef pgprot_noncached
3103         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3104 #endif
3105         area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3106         area->vm_private_data = substream;
3107         area->vm_flags |= VM_IO;
3108         size = area->vm_end - area->vm_start;
3109         offset = area->vm_pgoff << PAGE_SHIFT;
3110         if (io_remap_pfn_range(area, area->vm_start,
3111                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3112                                 size, area->vm_page_prot))
3113                 return -EAGAIN;
3114         atomic_inc(&substream->runtime->mmap_count);
3115         return 0;
3116 }
3117 #endif /* SNDRV_PCM_INFO_MMAP */
3118
3119 /*
3120  * mmap DMA buffer
3121  */
3122 int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file,
3123                       struct vm_area_struct *area)
3124 {
3125         snd_pcm_runtime_t *runtime;
3126         long size;
3127         unsigned long offset;
3128         size_t dma_bytes;
3129
3130         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3131                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3132                         return -EINVAL;
3133         } else {
3134                 if (!(area->vm_flags & VM_READ))
3135                         return -EINVAL;
3136         }
3137         runtime = substream->runtime;
3138         snd_assert(runtime != NULL, return -EAGAIN);
3139         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3140                 return -EBADFD;
3141         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3142                 return -ENXIO;
3143         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3144             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3145                 return -EINVAL;
3146         size = area->vm_end - area->vm_start;
3147         offset = area->vm_pgoff << PAGE_SHIFT;
3148         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3149         if ((size_t)size > dma_bytes)
3150                 return -EINVAL;
3151         if (offset > dma_bytes - size)
3152                 return -EINVAL;
3153
3154         if (substream->ops->mmap)
3155                 return substream->ops->mmap(substream, area);
3156         else
3157                 return snd_pcm_default_mmap(substream, area);
3158 }
3159
3160 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3161 {
3162         snd_pcm_file_t * pcm_file;
3163         snd_pcm_substream_t *substream; 
3164         unsigned long offset;
3165         
3166         pcm_file = file->private_data;
3167         substream = pcm_file->substream;
3168         snd_assert(substream != NULL, return -ENXIO);
3169
3170         offset = area->vm_pgoff << PAGE_SHIFT;
3171         switch (offset) {
3172         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3173                 if (substream->no_mmap_ctrl)
3174                         return -ENXIO;
3175                 return snd_pcm_mmap_status(substream, file, area);
3176         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3177                 if (substream->no_mmap_ctrl)
3178                         return -ENXIO;
3179                 return snd_pcm_mmap_control(substream, file, area);
3180         default:
3181                 return snd_pcm_mmap_data(substream, file, area);
3182         }
3183         return 0;
3184 }
3185
3186 static int snd_pcm_fasync(int fd, struct file * file, int on)
3187 {
3188         snd_pcm_file_t * pcm_file;
3189         snd_pcm_substream_t *substream;
3190         snd_pcm_runtime_t *runtime;
3191         int err;
3192
3193         pcm_file = file->private_data;
3194         substream = pcm_file->substream;
3195         snd_assert(substream != NULL, return -ENXIO);
3196         runtime = substream->runtime;
3197
3198         err = fasync_helper(fd, file, on, &runtime->fasync);
3199         if (err < 0)
3200                 return err;
3201         return 0;
3202 }
3203
3204 /*
3205  * ioctl32 compat
3206  */
3207 #ifdef CONFIG_COMPAT
3208 #include "pcm_compat.c"
3209 #else
3210 #define snd_pcm_ioctl_compat    NULL
3211 #endif
3212
3213 /*
3214  *  To be removed helpers to keep binary compatibility
3215  */
3216
3217 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3218 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3219
3220 static void snd_pcm_hw_convert_from_old_params(snd_pcm_hw_params_t *params, struct sndrv_pcm_hw_params_old *oparams)
3221 {
3222         unsigned int i;
3223
3224         memset(params, 0, sizeof(*params));
3225         params->flags = oparams->flags;
3226         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3227                 params->masks[i].bits[0] = oparams->masks[i];
3228         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3229         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3230         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3231         params->info = oparams->info;
3232         params->msbits = oparams->msbits;
3233         params->rate_num = oparams->rate_num;
3234         params->rate_den = oparams->rate_den;
3235         params->fifo_size = oparams->fifo_size;
3236 }
3237
3238 static void snd_pcm_hw_convert_to_old_params(struct sndrv_pcm_hw_params_old *oparams, snd_pcm_hw_params_t *params)
3239 {
3240         unsigned int i;
3241
3242         memset(oparams, 0, sizeof(*oparams));
3243         oparams->flags = params->flags;
3244         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3245                 oparams->masks[i] = params->masks[i].bits[0];
3246         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3247         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3248         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3249         oparams->info = params->info;
3250         oparams->msbits = params->msbits;
3251         oparams->rate_num = params->rate_num;
3252         oparams->rate_den = params->rate_den;
3253         oparams->fifo_size = params->fifo_size;
3254 }
3255
3256 static int snd_pcm_hw_refine_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams)
3257 {
3258         snd_pcm_hw_params_t *params;
3259         struct sndrv_pcm_hw_params_old *oparams = NULL;
3260         int err;
3261
3262         params = kmalloc(sizeof(*params), GFP_KERNEL);
3263         if (!params) {
3264                 err = -ENOMEM;
3265                 goto out;
3266         }
3267         oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3268         if (!oparams) {
3269                 err = -ENOMEM;
3270                 goto out;
3271         }
3272
3273         if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3274                 err = -EFAULT;
3275                 goto out;
3276         }
3277         snd_pcm_hw_convert_from_old_params(params, oparams);
3278         err = snd_pcm_hw_refine(substream, params);
3279         snd_pcm_hw_convert_to_old_params(oparams, params);
3280         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3281                 if (!err)
3282                         err = -EFAULT;
3283         }
3284 out:
3285         kfree(params);
3286         kfree(oparams);
3287         return err;
3288 }
3289
3290 static int snd_pcm_hw_params_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams)
3291 {
3292         snd_pcm_hw_params_t *params;
3293         struct sndrv_pcm_hw_params_old *oparams = NULL;
3294         int err;
3295
3296         params = kmalloc(sizeof(*params), GFP_KERNEL);
3297         if (!params) {
3298                 err = -ENOMEM;
3299                 goto out;
3300         }
3301         oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3302         if (!oparams) {
3303                 err = -ENOMEM;
3304                 goto out;
3305         }
3306         if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3307                 err = -EFAULT;
3308                 goto out;
3309         }
3310         snd_pcm_hw_convert_from_old_params(params, oparams);
3311         err = snd_pcm_hw_params(substream, params);
3312         snd_pcm_hw_convert_to_old_params(oparams, params);
3313         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3314                 if (!err)
3315                         err = -EFAULT;
3316         }
3317 out:
3318         kfree(params);
3319         kfree(oparams);
3320         return err;
3321 }
3322
3323 /*
3324  *  Register section
3325  */
3326
3327 static struct file_operations snd_pcm_f_ops_playback = {
3328         .owner =        THIS_MODULE,
3329         .write =        snd_pcm_write,
3330         .writev =       snd_pcm_writev,
3331         .open =         snd_pcm_open,
3332         .release =      snd_pcm_release,
3333         .poll =         snd_pcm_playback_poll,
3334         .unlocked_ioctl =       snd_pcm_playback_ioctl,
3335         .compat_ioctl = snd_pcm_ioctl_compat,
3336         .mmap =         snd_pcm_mmap,
3337         .fasync =       snd_pcm_fasync,
3338 };
3339
3340 static struct file_operations snd_pcm_f_ops_capture = {
3341         .owner =        THIS_MODULE,
3342         .read =         snd_pcm_read,
3343         .readv =        snd_pcm_readv,
3344         .open =         snd_pcm_open,
3345         .release =      snd_pcm_release,
3346         .poll =         snd_pcm_capture_poll,
3347         .unlocked_ioctl =       snd_pcm_capture_ioctl,
3348         .compat_ioctl = snd_pcm_ioctl_compat,
3349         .mmap =         snd_pcm_mmap,
3350         .fasync =       snd_pcm_fasync,
3351 };
3352
3353 snd_minor_t snd_pcm_reg[2] =
3354 {
3355         {
3356                 .comment =      "digital audio playback",
3357                 .f_ops =        &snd_pcm_f_ops_playback,
3358         },
3359         {
3360                 .comment =      "digital audio capture",
3361                 .f_ops =        &snd_pcm_f_ops_capture,
3362         }
3363 };