[ALSA] sound/core/: possible cleanups
[linux-2.6.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                         snd_timestamp_now(&status->tstamp, runtime->tstamp_timespec);
569         } else
570                 snd_timestamp_now(&status->tstamp, runtime->tstamp_timespec);
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                 snd_timestamp_now(&runtime->trigger_tstamp, runtime->tstamp_timespec);
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  *
863  * Start all linked streams.
864  */
865 int snd_pcm_start(snd_pcm_substream_t *substream)
866 {
867         return snd_pcm_action(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
868 }
869
870 /*
871  * stop callbacks
872  */
873 static int snd_pcm_pre_stop(snd_pcm_substream_t *substream, int state)
874 {
875         snd_pcm_runtime_t *runtime = substream->runtime;
876         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
877                 return -EBADFD;
878         runtime->trigger_master = substream;
879         return 0;
880 }
881
882 static int snd_pcm_do_stop(snd_pcm_substream_t *substream, int state)
883 {
884         if (substream->runtime->trigger_master == substream &&
885             snd_pcm_running(substream))
886                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
887         return 0; /* unconditonally stop all substreams */
888 }
889
890 static void snd_pcm_post_stop(snd_pcm_substream_t *substream, int state)
891 {
892         snd_pcm_runtime_t *runtime = substream->runtime;
893         if (runtime->status->state != state) {
894                 snd_pcm_trigger_tstamp(substream);
895                 if (substream->timer)
896                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP, &runtime->trigger_tstamp);
897                 runtime->status->state = state;
898                 snd_pcm_tick_set(substream, 0);
899         }
900         wake_up(&runtime->sleep);
901 }
902
903 static struct action_ops snd_pcm_action_stop = {
904         .pre_action = snd_pcm_pre_stop,
905         .do_action = snd_pcm_do_stop,
906         .post_action = snd_pcm_post_stop
907 };
908
909 /**
910  * snd_pcm_stop
911  *
912  * Try to stop all running streams in the substream group.
913  * The state of each stream is changed to the given value after that unconditionally.
914  */
915 int snd_pcm_stop(snd_pcm_substream_t *substream, int state)
916 {
917         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
918 }
919
920 /**
921  * snd_pcm_drain_done
922  *
923  * Stop the DMA only when the given stream is playback.
924  * The state is changed to SETUP.
925  * Unlike snd_pcm_stop(), this affects only the given stream.
926  */
927 int snd_pcm_drain_done(snd_pcm_substream_t *substream)
928 {
929         return snd_pcm_action_single(&snd_pcm_action_stop, substream, SNDRV_PCM_STATE_SETUP);
930 }
931
932 /*
933  * pause callbacks
934  */
935 static int snd_pcm_pre_pause(snd_pcm_substream_t *substream, int push)
936 {
937         snd_pcm_runtime_t *runtime = substream->runtime;
938         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
939                 return -ENOSYS;
940         if (push) {
941                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
942                         return -EBADFD;
943         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
944                 return -EBADFD;
945         runtime->trigger_master = substream;
946         return 0;
947 }
948
949 static int snd_pcm_do_pause(snd_pcm_substream_t *substream, int push)
950 {
951         if (substream->runtime->trigger_master != substream)
952                 return 0;
953         return substream->ops->trigger(substream,
954                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
955                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
956 }
957
958 static void snd_pcm_undo_pause(snd_pcm_substream_t *substream, int push)
959 {
960         if (substream->runtime->trigger_master == substream)
961                 substream->ops->trigger(substream,
962                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
963                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
964 }
965
966 static void snd_pcm_post_pause(snd_pcm_substream_t *substream, int push)
967 {
968         snd_pcm_runtime_t *runtime = substream->runtime;
969         snd_pcm_trigger_tstamp(substream);
970         if (push) {
971                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
972                 if (substream->timer)
973                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MPAUSE, &runtime->trigger_tstamp);
974                 snd_pcm_tick_set(substream, 0);
975                 wake_up(&runtime->sleep);
976         } else {
977                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
978                 if (runtime->sleep_min)
979                         snd_pcm_tick_prepare(substream);
980                 if (substream->timer)
981                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MCONTINUE, &runtime->trigger_tstamp);
982         }
983 }
984
985 static struct action_ops snd_pcm_action_pause = {
986         .pre_action = snd_pcm_pre_pause,
987         .do_action = snd_pcm_do_pause,
988         .undo_action = snd_pcm_undo_pause,
989         .post_action = snd_pcm_post_pause
990 };
991
992 /*
993  * Push/release the pause for all linked streams.
994  */
995 static int snd_pcm_pause(snd_pcm_substream_t *substream, int push)
996 {
997         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
998 }
999
1000 #ifdef CONFIG_PM
1001 /* suspend */
1002
1003 static int snd_pcm_pre_suspend(snd_pcm_substream_t *substream, int state)
1004 {
1005         snd_pcm_runtime_t *runtime = substream->runtime;
1006         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1007                 return -EBUSY;
1008         runtime->trigger_master = substream;
1009         return 0;
1010 }
1011
1012 static int snd_pcm_do_suspend(snd_pcm_substream_t *substream, int state)
1013 {
1014         snd_pcm_runtime_t *runtime = substream->runtime;
1015         if (runtime->trigger_master != substream)
1016                 return 0;
1017         if (! snd_pcm_running(substream))
1018                 return 0;
1019         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1020         return 0; /* suspend unconditionally */
1021 }
1022
1023 static void snd_pcm_post_suspend(snd_pcm_substream_t *substream, int state)
1024 {
1025         snd_pcm_runtime_t *runtime = substream->runtime;
1026         snd_pcm_trigger_tstamp(substream);
1027         if (substream->timer)
1028                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MPAUSE, &runtime->trigger_tstamp);
1029         runtime->status->suspended_state = runtime->status->state;
1030         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1031         snd_pcm_tick_set(substream, 0);
1032         wake_up(&runtime->sleep);
1033 }
1034
1035 static struct action_ops snd_pcm_action_suspend = {
1036         .pre_action = snd_pcm_pre_suspend,
1037         .do_action = snd_pcm_do_suspend,
1038         .post_action = snd_pcm_post_suspend
1039 };
1040
1041 /**
1042  * snd_pcm_suspend
1043  *
1044  * Trigger SUSPEND to all linked streams.
1045  * After this call, all streams are changed to SUSPENDED state.
1046  */
1047 int snd_pcm_suspend(snd_pcm_substream_t *substream)
1048 {
1049         int err;
1050         unsigned long flags;
1051
1052         snd_pcm_stream_lock_irqsave(substream, flags);
1053         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1054         snd_pcm_stream_unlock_irqrestore(substream, flags);
1055         return err;
1056 }
1057
1058 /**
1059  * snd_pcm_suspend_all
1060  *
1061  * Trigger SUSPEND to all substreams in the given pcm.
1062  * After this call, all streams are changed to SUSPENDED state.
1063  */
1064 int snd_pcm_suspend_all(snd_pcm_t *pcm)
1065 {
1066         snd_pcm_substream_t *substream;
1067         int stream, err = 0;
1068
1069         for (stream = 0; stream < 2; stream++) {
1070                 for (substream = pcm->streams[stream].substream; substream; substream = substream->next) {
1071                         /* FIXME: the open/close code should lock this as well */
1072                         if (substream->runtime == NULL)
1073                                 continue;
1074                         err = snd_pcm_suspend(substream);
1075                         if (err < 0 && err != -EBUSY)
1076                                 return err;
1077                 }
1078         }
1079         return 0;
1080 }
1081
1082 /* resume */
1083
1084 static int snd_pcm_pre_resume(snd_pcm_substream_t *substream, int state)
1085 {
1086         snd_pcm_runtime_t *runtime = substream->runtime;
1087         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1088                 return -ENOSYS;
1089         runtime->trigger_master = substream;
1090         return 0;
1091 }
1092
1093 static int snd_pcm_do_resume(snd_pcm_substream_t *substream, int state)
1094 {
1095         snd_pcm_runtime_t *runtime = substream->runtime;
1096         if (runtime->trigger_master != substream)
1097                 return 0;
1098         /* DMA not running previously? */
1099         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1100             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1101              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1102                 return 0;
1103         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1104 }
1105
1106 static void snd_pcm_undo_resume(snd_pcm_substream_t *substream, int state)
1107 {
1108         if (substream->runtime->trigger_master == substream &&
1109             snd_pcm_running(substream))
1110                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1111 }
1112
1113 static void snd_pcm_post_resume(snd_pcm_substream_t *substream, int state)
1114 {
1115         snd_pcm_runtime_t *runtime = substream->runtime;
1116         snd_pcm_trigger_tstamp(substream);
1117         if (substream->timer)
1118                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MCONTINUE, &runtime->trigger_tstamp);
1119         runtime->status->state = runtime->status->suspended_state;
1120         if (runtime->sleep_min)
1121                 snd_pcm_tick_prepare(substream);
1122 }
1123
1124 static struct action_ops snd_pcm_action_resume = {
1125         .pre_action = snd_pcm_pre_resume,
1126         .do_action = snd_pcm_do_resume,
1127         .undo_action = snd_pcm_undo_resume,
1128         .post_action = snd_pcm_post_resume
1129 };
1130
1131 static int snd_pcm_resume(snd_pcm_substream_t *substream)
1132 {
1133         snd_card_t *card = substream->pcm->card;
1134         int res;
1135
1136         snd_power_lock(card);
1137         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0)
1138                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1139         snd_power_unlock(card);
1140         return res;
1141 }
1142
1143 #else
1144
1145 static int snd_pcm_resume(snd_pcm_substream_t *substream)
1146 {
1147         return -ENOSYS;
1148 }
1149
1150 #endif /* CONFIG_PM */
1151
1152 /*
1153  * xrun ioctl
1154  *
1155  * Change the RUNNING stream(s) to XRUN state.
1156  */
1157 static int snd_pcm_xrun(snd_pcm_substream_t *substream)
1158 {
1159         snd_card_t *card = substream->pcm->card;
1160         snd_pcm_runtime_t *runtime = substream->runtime;
1161         int result;
1162
1163         snd_power_lock(card);
1164         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1165                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile);
1166                 if (result < 0)
1167                         goto _unlock;
1168         }
1169
1170         snd_pcm_stream_lock_irq(substream);
1171         switch (runtime->status->state) {
1172         case SNDRV_PCM_STATE_XRUN:
1173                 result = 0;     /* already there */
1174                 break;
1175         case SNDRV_PCM_STATE_RUNNING:
1176                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1177                 break;
1178         default:
1179                 result = -EBADFD;
1180         }
1181         snd_pcm_stream_unlock_irq(substream);
1182  _unlock:
1183         snd_power_unlock(card);
1184         return result;
1185 }
1186
1187 /*
1188  * reset ioctl
1189  */
1190 static int snd_pcm_pre_reset(snd_pcm_substream_t * substream, int state)
1191 {
1192         snd_pcm_runtime_t *runtime = substream->runtime;
1193         switch (runtime->status->state) {
1194         case SNDRV_PCM_STATE_RUNNING:
1195         case SNDRV_PCM_STATE_PREPARED:
1196         case SNDRV_PCM_STATE_PAUSED:
1197         case SNDRV_PCM_STATE_SUSPENDED:
1198                 return 0;
1199         default:
1200                 return -EBADFD;
1201         }
1202 }
1203
1204 static int snd_pcm_do_reset(snd_pcm_substream_t * substream, int state)
1205 {
1206         snd_pcm_runtime_t *runtime = substream->runtime;
1207         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1208         if (err < 0)
1209                 return err;
1210         // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1211         runtime->hw_ptr_base = 0;
1212         runtime->hw_ptr_interrupt = runtime->status->hw_ptr - runtime->status->hw_ptr % runtime->period_size;
1213         runtime->silence_start = runtime->status->hw_ptr;
1214         runtime->silence_filled = 0;
1215         return 0;
1216 }
1217
1218 static void snd_pcm_post_reset(snd_pcm_substream_t * substream, int state)
1219 {
1220         snd_pcm_runtime_t *runtime = substream->runtime;
1221         runtime->control->appl_ptr = runtime->status->hw_ptr;
1222         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1223             runtime->silence_size > 0)
1224                 snd_pcm_playback_silence(substream, ULONG_MAX);
1225 }
1226
1227 static struct action_ops snd_pcm_action_reset = {
1228         .pre_action = snd_pcm_pre_reset,
1229         .do_action = snd_pcm_do_reset,
1230         .post_action = snd_pcm_post_reset
1231 };
1232
1233 static int snd_pcm_reset(snd_pcm_substream_t *substream)
1234 {
1235         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1236 }
1237
1238 /*
1239  * prepare ioctl
1240  */
1241 static int snd_pcm_pre_prepare(snd_pcm_substream_t * substream, int state)
1242 {
1243         snd_pcm_runtime_t *runtime = substream->runtime;
1244         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1245                 return -EBADFD;
1246         if (snd_pcm_running(substream))
1247                 return -EBUSY;
1248         return 0;
1249 }
1250
1251 static int snd_pcm_do_prepare(snd_pcm_substream_t * substream, int state)
1252 {
1253         int err;
1254         err = substream->ops->prepare(substream);
1255         if (err < 0)
1256                 return err;
1257         return snd_pcm_do_reset(substream, 0);
1258 }
1259
1260 static void snd_pcm_post_prepare(snd_pcm_substream_t * substream, int state)
1261 {
1262         snd_pcm_runtime_t *runtime = substream->runtime;
1263         runtime->control->appl_ptr = runtime->status->hw_ptr;
1264         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1265 }
1266
1267 static struct action_ops snd_pcm_action_prepare = {
1268         .pre_action = snd_pcm_pre_prepare,
1269         .do_action = snd_pcm_do_prepare,
1270         .post_action = snd_pcm_post_prepare
1271 };
1272
1273 /**
1274  * snd_pcm_prepare
1275  */
1276 int snd_pcm_prepare(snd_pcm_substream_t *substream)
1277 {
1278         int res;
1279         snd_card_t *card = substream->pcm->card;
1280
1281         snd_power_lock(card);
1282         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile)) >= 0)
1283                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare, substream, 0);
1284         snd_power_unlock(card);
1285         return res;
1286 }
1287
1288 /*
1289  * drain ioctl
1290  */
1291
1292 static int snd_pcm_pre_drain_init(snd_pcm_substream_t * substream, int state)
1293 {
1294         if (substream->ffile->f_flags & O_NONBLOCK)
1295                 return -EAGAIN;
1296         substream->runtime->trigger_master = substream;
1297         return 0;
1298 }
1299
1300 static int snd_pcm_do_drain_init(snd_pcm_substream_t * substream, int state)
1301 {
1302         snd_pcm_runtime_t *runtime = substream->runtime;
1303         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1304                 switch (runtime->status->state) {
1305                 case SNDRV_PCM_STATE_PREPARED:
1306                         /* start playback stream if possible */
1307                         if (! snd_pcm_playback_empty(substream)) {
1308                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1309                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1310                         }
1311                         break;
1312                 case SNDRV_PCM_STATE_RUNNING:
1313                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1314                         break;
1315                 default:
1316                         break;
1317                 }
1318         } else {
1319                 /* stop running stream */
1320                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1321                         int state = snd_pcm_capture_avail(runtime) > 0 ?
1322                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1323                         snd_pcm_do_stop(substream, state);
1324                         snd_pcm_post_stop(substream, state);
1325                 }
1326         }
1327         return 0;
1328 }
1329
1330 static void snd_pcm_post_drain_init(snd_pcm_substream_t * substream, int state)
1331 {
1332 }
1333
1334 static struct action_ops snd_pcm_action_drain_init = {
1335         .pre_action = snd_pcm_pre_drain_init,
1336         .do_action = snd_pcm_do_drain_init,
1337         .post_action = snd_pcm_post_drain_init
1338 };
1339
1340 struct drain_rec {
1341         snd_pcm_substream_t *substream;
1342         wait_queue_t wait;
1343         snd_pcm_uframes_t stop_threshold;
1344 };
1345
1346 static int snd_pcm_drop(snd_pcm_substream_t *substream);
1347
1348 /*
1349  * Drain the stream(s).
1350  * When the substream is linked, sync until the draining of all playback streams
1351  * is finished.
1352  * After this call, all streams are supposed to be either SETUP or DRAINING
1353  * (capture only) state.
1354  */
1355 static int snd_pcm_drain(snd_pcm_substream_t *substream)
1356 {
1357         snd_card_t *card;
1358         snd_pcm_runtime_t *runtime;
1359         struct list_head *pos;
1360         int result = 0;
1361         int i, num_drecs;
1362         struct drain_rec *drec, drec_tmp, *d;
1363
1364         snd_assert(substream != NULL, return -ENXIO);
1365         card = substream->pcm->card;
1366         runtime = substream->runtime;
1367
1368         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1369                 return -EBADFD;
1370
1371         down_read(&snd_pcm_link_rwsem);
1372         snd_power_lock(card);
1373         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1374                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile);
1375                 if (result < 0)
1376                         goto _unlock;
1377         }
1378
1379         /* allocate temporary record for drain sync */
1380         if (snd_pcm_stream_linked(substream)) {
1381                 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1382                 if (! drec) {
1383                         result = -ENOMEM;
1384                         goto _unlock;
1385                 }
1386         } else
1387                 drec = &drec_tmp;
1388
1389         snd_pcm_stream_lock_irq(substream);
1390         /* resume pause */
1391         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1392                 snd_pcm_pause(substream, 0);
1393
1394         /* pre-start/stop - all running streams are changed to DRAINING state */
1395         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1396         if (result < 0)
1397                 goto _end;
1398
1399         /* check streams with PLAYBACK & DRAINING */
1400         num_drecs = 0;
1401         snd_pcm_group_for_each(pos, substream) {
1402                 snd_pcm_substream_t *s = snd_pcm_group_substream_entry(pos);
1403                 runtime = s->runtime;
1404                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING) {
1405                         runtime->status->state = SNDRV_PCM_STATE_SETUP;
1406                         continue;
1407                 }
1408                 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1409                         d = &drec[num_drecs++];
1410                         d->substream = s;
1411                         init_waitqueue_entry(&d->wait, current);
1412                         add_wait_queue(&runtime->sleep, &d->wait);
1413                         /* stop_threshold fixup to avoid endless loop when
1414                          * stop_threshold > buffer_size
1415                          */
1416                         d->stop_threshold = runtime->stop_threshold;
1417                         if (runtime->stop_threshold > runtime->buffer_size)
1418                                 runtime->stop_threshold = runtime->buffer_size;
1419                 }
1420         }
1421
1422         if (! num_drecs)
1423                 goto _end;
1424
1425         for (;;) {
1426                 long tout;
1427                 if (signal_pending(current)) {
1428                         result = -ERESTARTSYS;
1429                         break;
1430                 }
1431                 set_current_state(TASK_INTERRUPTIBLE);
1432                 snd_pcm_stream_unlock_irq(substream);
1433                 snd_power_unlock(card);
1434                 tout = schedule_timeout(10 * HZ);
1435                 snd_power_lock(card);
1436                 snd_pcm_stream_lock_irq(substream);
1437                 if (tout == 0) {
1438                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1439                                 result = -ESTRPIPE;
1440                         else {
1441                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1442                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1443                                 result = -EIO;
1444                         }
1445                         break;
1446                 }
1447                 /* all finished? */
1448                 for (i = 0; i < num_drecs; i++) {
1449                         runtime = drec[i].substream->runtime;
1450                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1451                                 break;
1452                 }
1453                 if (i == num_drecs)
1454                         break;
1455         }
1456         for (i = 0; i < num_drecs; i++) {
1457                 d = &drec[i];
1458                 runtime = d->substream->runtime;
1459                 remove_wait_queue(&runtime->sleep, &d->wait);
1460                 runtime->stop_threshold = d->stop_threshold;
1461         }
1462
1463  _end:
1464         snd_pcm_stream_unlock_irq(substream);
1465         if (drec != &drec_tmp)
1466                 kfree(drec);
1467  _unlock:
1468         snd_power_unlock(card);
1469         up_read(&snd_pcm_link_rwsem);
1470
1471         return result;
1472 }
1473
1474 /*
1475  * drop ioctl
1476  *
1477  * Immediately put all linked substreams into SETUP state.
1478  */
1479 static int snd_pcm_drop(snd_pcm_substream_t *substream)
1480 {
1481         snd_pcm_runtime_t *runtime;
1482         snd_card_t *card;
1483         int result = 0;
1484         
1485         snd_assert(substream != NULL, return -ENXIO);
1486         runtime = substream->runtime;
1487         card = substream->pcm->card;
1488
1489         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1490                 return -EBADFD;
1491
1492         snd_power_lock(card);
1493         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1494                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0, substream->ffile);
1495                 if (result < 0)
1496                         goto _unlock;
1497         }
1498
1499         snd_pcm_stream_lock_irq(substream);
1500         /* resume pause */
1501         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1502                 snd_pcm_pause(substream, 0);
1503
1504         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1505         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1506         snd_pcm_stream_unlock_irq(substream);
1507  _unlock:
1508         snd_power_unlock(card);
1509         return result;
1510 }
1511
1512
1513 /* WARNING: Don't forget to fput back the file */
1514 extern int snd_major;
1515 static struct file *snd_pcm_file_fd(int fd)
1516 {
1517         struct file *file;
1518         struct inode *inode;
1519         unsigned short minor;
1520         file = fget(fd);
1521         if (!file)
1522                 return NULL;
1523         inode = file->f_dentry->d_inode;
1524         if (!S_ISCHR(inode->i_mode) ||
1525             imajor(inode) != snd_major) {
1526                 fput(file);
1527                 return NULL;
1528         }
1529         minor = iminor(inode);
1530         if (minor >= 256 || 
1531             minor % SNDRV_MINOR_DEVICES < SNDRV_MINOR_PCM_PLAYBACK) {
1532                 fput(file);
1533                 return NULL;
1534         }
1535         return file;
1536 }
1537
1538 /*
1539  * PCM link handling
1540  */
1541 static int snd_pcm_link(snd_pcm_substream_t *substream, int fd)
1542 {
1543         int res = 0;
1544         struct file *file;
1545         snd_pcm_file_t *pcm_file;
1546         snd_pcm_substream_t *substream1;
1547
1548         file = snd_pcm_file_fd(fd);
1549         if (!file)
1550                 return -EBADFD;
1551         pcm_file = file->private_data;
1552         substream1 = pcm_file->substream;
1553         down_write(&snd_pcm_link_rwsem);
1554         write_lock_irq(&snd_pcm_link_rwlock);
1555         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1556             substream->runtime->status->state != substream1->runtime->status->state) {
1557                 res = -EBADFD;
1558                 goto _end;
1559         }
1560         if (snd_pcm_stream_linked(substream1)) {
1561                 res = -EALREADY;
1562                 goto _end;
1563         }
1564         if (!snd_pcm_stream_linked(substream)) {
1565                 substream->group = kmalloc(sizeof(snd_pcm_group_t), GFP_ATOMIC);
1566                 if (substream->group == NULL) {
1567                         res = -ENOMEM;
1568                         goto _end;
1569                 }
1570                 spin_lock_init(&substream->group->lock);
1571                 INIT_LIST_HEAD(&substream->group->substreams);
1572                 list_add_tail(&substream->link_list, &substream->group->substreams);
1573                 substream->group->count = 1;
1574         }
1575         list_add_tail(&substream1->link_list, &substream->group->substreams);
1576         substream->group->count++;
1577         substream1->group = substream->group;
1578  _end:
1579         write_unlock_irq(&snd_pcm_link_rwlock);
1580         up_write(&snd_pcm_link_rwsem);
1581         fput(file);
1582         return res;
1583 }
1584
1585 static void relink_to_local(snd_pcm_substream_t *substream)
1586 {
1587         substream->group = &substream->self_group;
1588         INIT_LIST_HEAD(&substream->self_group.substreams);
1589         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1590 }
1591
1592 static int snd_pcm_unlink(snd_pcm_substream_t *substream)
1593 {
1594         struct list_head *pos;
1595         int res = 0;
1596
1597         down_write(&snd_pcm_link_rwsem);
1598         write_lock_irq(&snd_pcm_link_rwlock);
1599         if (!snd_pcm_stream_linked(substream)) {
1600                 res = -EALREADY;
1601                 goto _end;
1602         }
1603         list_del(&substream->link_list);
1604         substream->group->count--;
1605         if (substream->group->count == 1) {     /* detach the last stream, too */
1606                 snd_pcm_group_for_each(pos, substream) {
1607                         relink_to_local(snd_pcm_group_substream_entry(pos));
1608                         break;
1609                 }
1610                 kfree(substream->group);
1611         }
1612         relink_to_local(substream);
1613        _end:
1614         write_unlock_irq(&snd_pcm_link_rwlock);
1615         up_write(&snd_pcm_link_rwsem);
1616         return res;
1617 }
1618
1619 /*
1620  * hw configurator
1621  */
1622 static int snd_pcm_hw_rule_mul(snd_pcm_hw_params_t *params,
1623                                snd_pcm_hw_rule_t *rule)
1624 {
1625         snd_interval_t t;
1626         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1627                      hw_param_interval_c(params, rule->deps[1]), &t);
1628         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1629 }
1630
1631 static int snd_pcm_hw_rule_div(snd_pcm_hw_params_t *params,
1632                                snd_pcm_hw_rule_t *rule)
1633 {
1634         snd_interval_t t;
1635         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1636                      hw_param_interval_c(params, rule->deps[1]), &t);
1637         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1638 }
1639
1640 static int snd_pcm_hw_rule_muldivk(snd_pcm_hw_params_t *params,
1641                                    snd_pcm_hw_rule_t *rule)
1642 {
1643         snd_interval_t t;
1644         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1645                          hw_param_interval_c(params, rule->deps[1]),
1646                          (unsigned long) rule->private, &t);
1647         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1648 }
1649
1650 static int snd_pcm_hw_rule_mulkdiv(snd_pcm_hw_params_t *params,
1651                                    snd_pcm_hw_rule_t *rule)
1652 {
1653         snd_interval_t t;
1654         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1655                          (unsigned long) rule->private,
1656                          hw_param_interval_c(params, rule->deps[1]), &t);
1657         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1658 }
1659
1660 static int snd_pcm_hw_rule_format(snd_pcm_hw_params_t *params,
1661                                   snd_pcm_hw_rule_t *rule)
1662 {
1663         unsigned int k;
1664         snd_interval_t *i = hw_param_interval(params, rule->deps[0]);
1665         snd_mask_t m;
1666         snd_mask_t *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1667         snd_mask_any(&m);
1668         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1669                 int bits;
1670                 if (! snd_mask_test(mask, k))
1671                         continue;
1672                 bits = snd_pcm_format_physical_width(k);
1673                 if (bits <= 0)
1674                         continue; /* ignore invalid formats */
1675                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1676                         snd_mask_reset(&m, k);
1677         }
1678         return snd_mask_refine(mask, &m);
1679 }
1680
1681 static int snd_pcm_hw_rule_sample_bits(snd_pcm_hw_params_t *params,
1682                                        snd_pcm_hw_rule_t *rule)
1683 {
1684         snd_interval_t t;
1685         unsigned int k;
1686         t.min = UINT_MAX;
1687         t.max = 0;
1688         t.openmin = 0;
1689         t.openmax = 0;
1690         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1691                 int bits;
1692                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1693                         continue;
1694                 bits = snd_pcm_format_physical_width(k);
1695                 if (bits <= 0)
1696                         continue; /* ignore invalid formats */
1697                 if (t.min > (unsigned)bits)
1698                         t.min = bits;
1699                 if (t.max < (unsigned)bits)
1700                         t.max = bits;
1701         }
1702         t.integer = 1;
1703         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1704 }
1705
1706 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1707 #error "Change this table"
1708 #endif
1709
1710 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1711                                  48000, 64000, 88200, 96000, 176400, 192000 };
1712
1713 static int snd_pcm_hw_rule_rate(snd_pcm_hw_params_t *params,
1714                                 snd_pcm_hw_rule_t *rule)
1715 {
1716         snd_pcm_hardware_t *hw = rule->private;
1717         return snd_interval_list(hw_param_interval(params, rule->var),
1718                                  ARRAY_SIZE(rates), rates, hw->rates);
1719 }               
1720
1721 static int snd_pcm_hw_rule_buffer_bytes_max(snd_pcm_hw_params_t *params,
1722                                             snd_pcm_hw_rule_t *rule)
1723 {
1724         snd_interval_t t;
1725         snd_pcm_substream_t *substream = rule->private;
1726         t.min = 0;
1727         t.max = substream->buffer_bytes_max;
1728         t.openmin = 0;
1729         t.openmax = 0;
1730         t.integer = 1;
1731         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1732 }               
1733
1734 int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream)
1735 {
1736         snd_pcm_runtime_t *runtime = substream->runtime;
1737         snd_pcm_hw_constraints_t *constrs = &runtime->hw_constraints;
1738         int k, err;
1739
1740         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1741                 snd_mask_any(constrs_mask(constrs, k));
1742         }
1743
1744         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1745                 snd_interval_any(constrs_interval(constrs, k));
1746         }
1747
1748         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1749         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1750         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1751         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1752         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1753
1754         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1755                                    snd_pcm_hw_rule_format, NULL,
1756                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1757         if (err < 0)
1758                 return err;
1759         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1760                                   snd_pcm_hw_rule_sample_bits, NULL,
1761                                   SNDRV_PCM_HW_PARAM_FORMAT, 
1762                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1763         if (err < 0)
1764                 return err;
1765         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1766                                   snd_pcm_hw_rule_div, NULL,
1767                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1768         if (err < 0)
1769                 return err;
1770         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1771                                   snd_pcm_hw_rule_mul, NULL,
1772                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1773         if (err < 0)
1774                 return err;
1775         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1776                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1777                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1778         if (err < 0)
1779                 return err;
1780         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1781                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1782                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1783         if (err < 0)
1784                 return err;
1785         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 
1786                                   snd_pcm_hw_rule_div, NULL,
1787                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1788         if (err < 0)
1789                 return err;
1790         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1791                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1792                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1793         if (err < 0)
1794                 return err;
1795         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1796                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1797                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1798         if (err < 0)
1799                 return err;
1800         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 
1801                                   snd_pcm_hw_rule_div, NULL,
1802                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1803         if (err < 0)
1804                 return err;
1805         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1806                                   snd_pcm_hw_rule_div, NULL,
1807                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1808         if (err < 0)
1809                 return err;
1810         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1811                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1812                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1813         if (err < 0)
1814                 return err;
1815         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1816                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1817                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1818         if (err < 0)
1819                 return err;
1820         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1821                                   snd_pcm_hw_rule_mul, NULL,
1822                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1823         if (err < 0)
1824                 return err;
1825         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1826                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1827                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1828         if (err < 0)
1829                 return err;
1830         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1831                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1832                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1833         if (err < 0)
1834                 return err;
1835         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 
1836                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1837                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1838         if (err < 0)
1839                 return err;
1840         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
1841                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1842                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1843         if (err < 0)
1844                 return err;
1845         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 
1846                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1847                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1848         if (err < 0)
1849                 return err;
1850         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 
1851                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1852                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1853         if (err < 0)
1854                 return err;
1855         return 0;
1856 }
1857
1858 int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream)
1859 {
1860         snd_pcm_runtime_t *runtime = substream->runtime;
1861         snd_pcm_hardware_t *hw = &runtime->hw;
1862         int err;
1863         unsigned int mask = 0;
1864
1865         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1866                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1867         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1868                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1869         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1870                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1871                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1872                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1873                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1874                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1875                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1876         }
1877         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1878         snd_assert(err >= 0, return -EINVAL);
1879
1880         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1881         snd_assert(err >= 0, return -EINVAL);
1882
1883         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1884         snd_assert(err >= 0, return -EINVAL);
1885
1886         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1887                                            hw->channels_min, hw->channels_max);
1888         snd_assert(err >= 0, return -EINVAL);
1889
1890         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1891                                            hw->rate_min, hw->rate_max);
1892         snd_assert(err >= 0, return -EINVAL);
1893
1894         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1895                                            hw->period_bytes_min, hw->period_bytes_max);
1896         snd_assert(err >= 0, return -EINVAL);
1897
1898         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1899                                            hw->periods_min, hw->periods_max);
1900         snd_assert(err >= 0, return -EINVAL);
1901
1902         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1903                                            hw->period_bytes_min, hw->buffer_bytes_max);
1904         snd_assert(err >= 0, return -EINVAL);
1905
1906         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
1907                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1908                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1909         if (err < 0)
1910                 return err;
1911
1912         /* FIXME: remove */
1913         if (runtime->dma_bytes) {
1914                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1915                 snd_assert(err >= 0, return -EINVAL);
1916         }
1917
1918         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1919                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1920                                           snd_pcm_hw_rule_rate, hw,
1921                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1922                 if (err < 0)
1923                         return err;
1924         }
1925
1926         /* FIXME: this belong to lowlevel */
1927         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
1928                                      1000000 / HZ, 1000000 / HZ);
1929         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1930
1931         return 0;
1932 }
1933
1934 static void snd_pcm_add_file(snd_pcm_str_t *str,
1935                              snd_pcm_file_t *pcm_file)
1936 {
1937         pcm_file->next = str->files;
1938         str->files = pcm_file;
1939 }
1940
1941 static void snd_pcm_remove_file(snd_pcm_str_t *str,
1942                                 snd_pcm_file_t *pcm_file)
1943 {
1944         snd_pcm_file_t * pcm_file1;
1945         if (str->files == pcm_file) {
1946                 str->files = pcm_file->next;
1947         } else {
1948                 pcm_file1 = str->files;
1949                 while (pcm_file1 && pcm_file1->next != pcm_file)
1950                         pcm_file1 = pcm_file1->next;
1951                 if (pcm_file1 != NULL)
1952                         pcm_file1->next = pcm_file->next;
1953         }
1954 }
1955
1956 static int snd_pcm_release_file(snd_pcm_file_t * pcm_file)
1957 {
1958         snd_pcm_substream_t *substream;
1959         snd_pcm_runtime_t *runtime;
1960         snd_pcm_str_t * str;
1961
1962         snd_assert(pcm_file != NULL, return -ENXIO);
1963         substream = pcm_file->substream;
1964         snd_assert(substream != NULL, return -ENXIO);
1965         runtime = substream->runtime;
1966         str = substream->pstr;
1967         snd_pcm_unlink(substream);
1968         if (substream->open_flag) {
1969                 if (substream->ops->hw_free != NULL)
1970                         substream->ops->hw_free(substream);
1971                 substream->ops->close(substream);
1972                 substream->open_flag = 0;
1973         }
1974         substream->ffile = NULL;
1975         snd_pcm_remove_file(str, pcm_file);
1976         snd_pcm_release_substream(substream);
1977         kfree(pcm_file);
1978         return 0;
1979 }
1980
1981 static int snd_pcm_open_file(struct file *file,
1982                              snd_pcm_t *pcm,
1983                              int stream,
1984                              snd_pcm_file_t **rpcm_file)
1985 {
1986         int err = 0;
1987         snd_pcm_file_t *pcm_file;
1988         snd_pcm_substream_t *substream;
1989         snd_pcm_str_t *str;
1990
1991         snd_assert(rpcm_file != NULL, return -EINVAL);
1992         *rpcm_file = NULL;
1993
1994         pcm_file = kcalloc(1, sizeof(*pcm_file), GFP_KERNEL);
1995         if (pcm_file == NULL) {
1996                 return -ENOMEM;
1997         }
1998
1999         if ((err = snd_pcm_open_substream(pcm, stream, &substream)) < 0) {
2000                 kfree(pcm_file);
2001                 return err;
2002         }
2003
2004         str = substream->pstr;
2005         substream->file = pcm_file;
2006         substream->no_mmap_ctrl = 0;
2007
2008         pcm_file->substream = substream;
2009
2010         snd_pcm_add_file(str, pcm_file);
2011
2012         err = snd_pcm_hw_constraints_init(substream);
2013         if (err < 0) {
2014                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2015                 snd_pcm_release_file(pcm_file);
2016                 return err;
2017         }
2018
2019         if ((err = substream->ops->open(substream)) < 0) {
2020                 snd_pcm_release_file(pcm_file);
2021                 return err;
2022         }
2023         substream->open_flag = 1;
2024
2025         err = snd_pcm_hw_constraints_complete(substream);
2026         if (err < 0) {
2027                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2028                 substream->ops->close(substream);
2029                 snd_pcm_release_file(pcm_file);
2030                 return err;
2031         }
2032
2033         substream->ffile = file;
2034
2035         file->private_data = pcm_file;
2036         *rpcm_file = pcm_file;
2037         return 0;
2038 }
2039
2040 static int snd_pcm_open(struct inode *inode, struct file *file)
2041 {
2042         int cardnum = SNDRV_MINOR_CARD(iminor(inode));
2043         int device = SNDRV_MINOR_DEVICE(iminor(inode));
2044         int err;
2045         snd_pcm_t *pcm;
2046         snd_pcm_file_t *pcm_file;
2047         wait_queue_t wait;
2048
2049         snd_runtime_check(device >= SNDRV_MINOR_PCM_PLAYBACK && device < SNDRV_MINOR_DEVICES, return -ENXIO);
2050         pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + (device % SNDRV_MINOR_PCMS)];
2051         if (pcm == NULL) {
2052                 err = -ENODEV;
2053                 goto __error1;
2054         }
2055         err = snd_card_file_add(pcm->card, file);
2056         if (err < 0)
2057                 goto __error1;
2058         if (!try_module_get(pcm->card->module)) {
2059                 err = -EFAULT;
2060                 goto __error2;
2061         }
2062         init_waitqueue_entry(&wait, current);
2063         add_wait_queue(&pcm->open_wait, &wait);
2064         down(&pcm->open_mutex);
2065         while (1) {
2066                 err = snd_pcm_open_file(file, pcm, device >= SNDRV_MINOR_PCM_CAPTURE ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, &pcm_file);
2067                 if (err >= 0)
2068                         break;
2069                 if (err == -EAGAIN) {
2070                         if (file->f_flags & O_NONBLOCK) {
2071                                 err = -EBUSY;
2072                                 break;
2073                         }
2074                 } else
2075                         break;
2076                 set_current_state(TASK_INTERRUPTIBLE);
2077                 up(&pcm->open_mutex);
2078                 schedule();
2079                 down(&pcm->open_mutex);
2080                 if (signal_pending(current)) {
2081                         err = -ERESTARTSYS;
2082                         break;
2083                 }
2084         }
2085         remove_wait_queue(&pcm->open_wait, &wait);
2086         up(&pcm->open_mutex);
2087         if (err < 0)
2088                 goto __error;
2089         return err;
2090
2091       __error:
2092         module_put(pcm->card->module);
2093       __error2:
2094         snd_card_file_remove(pcm->card, file);
2095       __error1:
2096         return err;
2097 }
2098
2099 static int snd_pcm_release(struct inode *inode, struct file *file)
2100 {
2101         snd_pcm_t *pcm;
2102         snd_pcm_substream_t *substream;
2103         snd_pcm_file_t *pcm_file;
2104
2105         pcm_file = file->private_data;
2106         substream = pcm_file->substream;
2107         snd_assert(substream != NULL, return -ENXIO);
2108         snd_assert(!atomic_read(&substream->runtime->mmap_count), );
2109         pcm = substream->pcm;
2110         snd_pcm_drop(substream);
2111         fasync_helper(-1, file, 0, &substream->runtime->fasync);
2112         down(&pcm->open_mutex);
2113         snd_pcm_release_file(pcm_file);
2114         up(&pcm->open_mutex);
2115         wake_up(&pcm->open_wait);
2116         module_put(pcm->card->module);
2117         snd_card_file_remove(pcm->card, file);
2118         return 0;
2119 }
2120
2121 static snd_pcm_sframes_t snd_pcm_playback_rewind(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2122 {
2123         snd_pcm_runtime_t *runtime = substream->runtime;
2124         snd_pcm_sframes_t appl_ptr;
2125         snd_pcm_sframes_t ret;
2126         snd_pcm_sframes_t hw_avail;
2127
2128         if (frames == 0)
2129                 return 0;
2130
2131         snd_pcm_stream_lock_irq(substream);
2132         switch (runtime->status->state) {
2133         case SNDRV_PCM_STATE_PREPARED:
2134                 break;
2135         case SNDRV_PCM_STATE_DRAINING:
2136         case SNDRV_PCM_STATE_RUNNING:
2137                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2138                         break;
2139                 /* Fall through */
2140         case SNDRV_PCM_STATE_XRUN:
2141                 ret = -EPIPE;
2142                 goto __end;
2143         default:
2144                 ret = -EBADFD;
2145                 goto __end;
2146         }
2147
2148         hw_avail = snd_pcm_playback_hw_avail(runtime);
2149         if (hw_avail <= 0) {
2150                 ret = 0;
2151                 goto __end;
2152         }
2153         if (frames > (snd_pcm_uframes_t)hw_avail)
2154                 frames = hw_avail;
2155         else
2156                 frames -= frames % runtime->xfer_align;
2157         appl_ptr = runtime->control->appl_ptr - frames;
2158         if (appl_ptr < 0)
2159                 appl_ptr += runtime->boundary;
2160         runtime->control->appl_ptr = appl_ptr;
2161         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2162             runtime->sleep_min)
2163                 snd_pcm_tick_prepare(substream);
2164         ret = frames;
2165  __end:
2166         snd_pcm_stream_unlock_irq(substream);
2167         return ret;
2168 }
2169
2170 static snd_pcm_sframes_t snd_pcm_capture_rewind(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2171 {
2172         snd_pcm_runtime_t *runtime = substream->runtime;
2173         snd_pcm_sframes_t appl_ptr;
2174         snd_pcm_sframes_t ret;
2175         snd_pcm_sframes_t hw_avail;
2176
2177         if (frames == 0)
2178                 return 0;
2179
2180         snd_pcm_stream_lock_irq(substream);
2181         switch (runtime->status->state) {
2182         case SNDRV_PCM_STATE_PREPARED:
2183         case SNDRV_PCM_STATE_DRAINING:
2184                 break;
2185         case SNDRV_PCM_STATE_RUNNING:
2186                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2187                         break;
2188                 /* Fall through */
2189         case SNDRV_PCM_STATE_XRUN:
2190                 ret = -EPIPE;
2191                 goto __end;
2192         default:
2193                 ret = -EBADFD;
2194                 goto __end;
2195         }
2196
2197         hw_avail = snd_pcm_capture_hw_avail(runtime);
2198         if (hw_avail <= 0) {
2199                 ret = 0;
2200                 goto __end;
2201         }
2202         if (frames > (snd_pcm_uframes_t)hw_avail)
2203                 frames = hw_avail;
2204         else
2205                 frames -= frames % runtime->xfer_align;
2206         appl_ptr = runtime->control->appl_ptr - frames;
2207         if (appl_ptr < 0)
2208                 appl_ptr += runtime->boundary;
2209         runtime->control->appl_ptr = appl_ptr;
2210         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2211             runtime->sleep_min)
2212                 snd_pcm_tick_prepare(substream);
2213         ret = frames;
2214  __end:
2215         snd_pcm_stream_unlock_irq(substream);
2216         return ret;
2217 }
2218
2219 static snd_pcm_sframes_t snd_pcm_playback_forward(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2220 {
2221         snd_pcm_runtime_t *runtime = substream->runtime;
2222         snd_pcm_sframes_t appl_ptr;
2223         snd_pcm_sframes_t ret;
2224         snd_pcm_sframes_t avail;
2225
2226         if (frames == 0)
2227                 return 0;
2228
2229         snd_pcm_stream_lock_irq(substream);
2230         switch (runtime->status->state) {
2231         case SNDRV_PCM_STATE_PREPARED:
2232         case SNDRV_PCM_STATE_PAUSED:
2233                 break;
2234         case SNDRV_PCM_STATE_DRAINING:
2235         case SNDRV_PCM_STATE_RUNNING:
2236                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2237                         break;
2238                 /* Fall through */
2239         case SNDRV_PCM_STATE_XRUN:
2240                 ret = -EPIPE;
2241                 goto __end;
2242         default:
2243                 ret = -EBADFD;
2244                 goto __end;
2245         }
2246
2247         avail = snd_pcm_playback_avail(runtime);
2248         if (avail <= 0) {
2249                 ret = 0;
2250                 goto __end;
2251         }
2252         if (frames > (snd_pcm_uframes_t)avail)
2253                 frames = avail;
2254         else
2255                 frames -= frames % runtime->xfer_align;
2256         appl_ptr = runtime->control->appl_ptr + frames;
2257         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2258                 appl_ptr -= runtime->boundary;
2259         runtime->control->appl_ptr = appl_ptr;
2260         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2261             runtime->sleep_min)
2262                 snd_pcm_tick_prepare(substream);
2263         ret = frames;
2264  __end:
2265         snd_pcm_stream_unlock_irq(substream);
2266         return ret;
2267 }
2268
2269 static snd_pcm_sframes_t snd_pcm_capture_forward(snd_pcm_substream_t *substream, snd_pcm_uframes_t frames)
2270 {
2271         snd_pcm_runtime_t *runtime = substream->runtime;
2272         snd_pcm_sframes_t appl_ptr;
2273         snd_pcm_sframes_t ret;
2274         snd_pcm_sframes_t avail;
2275
2276         if (frames == 0)
2277                 return 0;
2278
2279         snd_pcm_stream_lock_irq(substream);
2280         switch (runtime->status->state) {
2281         case SNDRV_PCM_STATE_PREPARED:
2282         case SNDRV_PCM_STATE_DRAINING:
2283         case SNDRV_PCM_STATE_PAUSED:
2284                 break;
2285         case SNDRV_PCM_STATE_RUNNING:
2286                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2287                         break;
2288                 /* Fall through */
2289         case SNDRV_PCM_STATE_XRUN:
2290                 ret = -EPIPE;
2291                 goto __end;
2292         default:
2293                 ret = -EBADFD;
2294                 goto __end;
2295         }
2296
2297         avail = snd_pcm_capture_avail(runtime);
2298         if (avail <= 0) {
2299                 ret = 0;
2300                 goto __end;
2301         }
2302         if (frames > (snd_pcm_uframes_t)avail)
2303                 frames = avail;
2304         else
2305                 frames -= frames % runtime->xfer_align;
2306         appl_ptr = runtime->control->appl_ptr + frames;
2307         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2308                 appl_ptr -= runtime->boundary;
2309         runtime->control->appl_ptr = appl_ptr;
2310         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2311             runtime->sleep_min)
2312                 snd_pcm_tick_prepare(substream);
2313         ret = frames;
2314  __end:
2315         snd_pcm_stream_unlock_irq(substream);
2316         return ret;
2317 }
2318
2319 static int snd_pcm_hwsync(snd_pcm_substream_t *substream)
2320 {
2321         snd_pcm_runtime_t *runtime = substream->runtime;
2322         int err;
2323
2324         snd_pcm_stream_lock_irq(substream);
2325         switch (runtime->status->state) {
2326         case SNDRV_PCM_STATE_DRAINING:
2327                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2328                         goto __badfd;
2329         case SNDRV_PCM_STATE_RUNNING:
2330                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2331                         break;
2332                 /* Fall through */
2333         case SNDRV_PCM_STATE_PREPARED:
2334         case SNDRV_PCM_STATE_SUSPENDED:
2335                 err = 0;
2336                 break;
2337         case SNDRV_PCM_STATE_XRUN:
2338                 err = -EPIPE;
2339                 break;
2340         default:
2341               __badfd:
2342                 err = -EBADFD;
2343                 break;
2344         }
2345         snd_pcm_stream_unlock_irq(substream);
2346         return err;
2347 }
2348                 
2349 static int snd_pcm_delay(snd_pcm_substream_t *substream, snd_pcm_sframes_t __user *res)
2350 {
2351         snd_pcm_runtime_t *runtime = substream->runtime;
2352         int err;
2353         snd_pcm_sframes_t n = 0;
2354
2355         snd_pcm_stream_lock_irq(substream);
2356         switch (runtime->status->state) {
2357         case SNDRV_PCM_STATE_DRAINING:
2358                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2359                         goto __badfd;
2360         case SNDRV_PCM_STATE_RUNNING:
2361                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2362                         break;
2363                 /* Fall through */
2364         case SNDRV_PCM_STATE_PREPARED:
2365         case SNDRV_PCM_STATE_SUSPENDED:
2366                 err = 0;
2367                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2368                         n = snd_pcm_playback_hw_avail(runtime);
2369                 else
2370                         n = snd_pcm_capture_avail(runtime);
2371                 break;
2372         case SNDRV_PCM_STATE_XRUN:
2373                 err = -EPIPE;
2374                 break;
2375         default:
2376               __badfd:
2377                 err = -EBADFD;
2378                 break;
2379         }
2380         snd_pcm_stream_unlock_irq(substream);
2381         if (!err)
2382                 if (put_user(n, res))
2383                         err = -EFAULT;
2384         return err;
2385 }
2386                 
2387 static int snd_pcm_sync_ptr(snd_pcm_substream_t *substream, struct sndrv_pcm_sync_ptr __user *_sync_ptr)
2388 {
2389         snd_pcm_runtime_t *runtime = substream->runtime;
2390         struct sndrv_pcm_sync_ptr sync_ptr;
2391         volatile struct sndrv_pcm_mmap_status *status;
2392         volatile struct sndrv_pcm_mmap_control *control;
2393         int err;
2394
2395         memset(&sync_ptr, 0, sizeof(sync_ptr));
2396         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2397                 return -EFAULT;
2398         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct sndrv_pcm_mmap_control)))
2399                 return -EFAULT; 
2400         status = runtime->status;
2401         control = runtime->control;
2402         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2403                 err = snd_pcm_hwsync(substream);
2404                 if (err < 0)
2405                         return err;
2406         }
2407         snd_pcm_stream_lock_irq(substream);
2408         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2409                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2410         else
2411                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2412         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2413                 control->avail_min = sync_ptr.c.control.avail_min;
2414         else
2415                 sync_ptr.c.control.avail_min = control->avail_min;
2416         sync_ptr.s.status.state = status->state;
2417         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2418         sync_ptr.s.status.tstamp = status->tstamp;
2419         sync_ptr.s.status.suspended_state = status->suspended_state;
2420         snd_pcm_stream_unlock_irq(substream);
2421         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2422                 return -EFAULT;
2423         return 0;
2424 }
2425                 
2426 static int snd_pcm_playback_ioctl1(snd_pcm_substream_t *substream,
2427                                    unsigned int cmd, void __user *arg);
2428 static int snd_pcm_capture_ioctl1(snd_pcm_substream_t *substream,
2429                                   unsigned int cmd, void __user *arg);
2430
2431 static int snd_pcm_common_ioctl1(snd_pcm_substream_t *substream,
2432                                  unsigned int cmd, void __user *arg)
2433 {
2434         snd_assert(substream != NULL, return -ENXIO);
2435
2436         switch (cmd) {
2437         case SNDRV_PCM_IOCTL_PVERSION:
2438                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2439         case SNDRV_PCM_IOCTL_INFO:
2440                 return snd_pcm_info_user(substream, arg);
2441         case SNDRV_PCM_IOCTL_TSTAMP:
2442         {
2443                 int xarg;
2444                 if (get_user(xarg, (int __user *)arg))
2445                         return -EFAULT;
2446                 substream->runtime->tstamp_timespec = xarg ? 1 : 0;
2447                 return 0;
2448         }
2449         case SNDRV_PCM_IOCTL_HW_REFINE:
2450                 return snd_pcm_hw_refine_user(substream, arg);
2451         case SNDRV_PCM_IOCTL_HW_PARAMS:
2452                 return snd_pcm_hw_params_user(substream, arg);
2453         case SNDRV_PCM_IOCTL_HW_FREE:
2454                 return snd_pcm_hw_free(substream);
2455         case SNDRV_PCM_IOCTL_SW_PARAMS:
2456                 return snd_pcm_sw_params_user(substream, arg);
2457         case SNDRV_PCM_IOCTL_STATUS:
2458                 return snd_pcm_status_user(substream, arg);
2459         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2460                 return snd_pcm_channel_info_user(substream, arg);
2461         case SNDRV_PCM_IOCTL_PREPARE:
2462                 return snd_pcm_prepare(substream);
2463         case SNDRV_PCM_IOCTL_RESET:
2464                 return snd_pcm_reset(substream);
2465         case SNDRV_PCM_IOCTL_START:
2466                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2467         case SNDRV_PCM_IOCTL_LINK:
2468                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2469         case SNDRV_PCM_IOCTL_UNLINK:
2470                 return snd_pcm_unlink(substream);
2471         case SNDRV_PCM_IOCTL_RESUME:
2472                 return snd_pcm_resume(substream);
2473         case SNDRV_PCM_IOCTL_XRUN:
2474                 return snd_pcm_xrun(substream);
2475         case SNDRV_PCM_IOCTL_HWSYNC:
2476                 return snd_pcm_hwsync(substream);
2477         case SNDRV_PCM_IOCTL_DELAY:
2478                 return snd_pcm_delay(substream, arg);
2479         case SNDRV_PCM_IOCTL_SYNC_PTR:
2480                 return snd_pcm_sync_ptr(substream, arg);
2481         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2482                 return snd_pcm_hw_refine_old_user(substream, arg);
2483         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2484                 return snd_pcm_hw_params_old_user(substream, arg);
2485         case SNDRV_PCM_IOCTL_DRAIN:
2486                 return snd_pcm_drain(substream);
2487         case SNDRV_PCM_IOCTL_DROP:
2488                 return snd_pcm_drop(substream);
2489         }
2490         snd_printd("unknown ioctl = 0x%x\n", cmd);
2491         return -ENOTTY;
2492 }
2493
2494 static int snd_pcm_playback_ioctl1(snd_pcm_substream_t *substream,
2495                                    unsigned int cmd, void __user *arg)
2496 {
2497         snd_assert(substream != NULL, return -ENXIO);
2498         snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2499         switch (cmd) {
2500         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2501         {
2502                 snd_xferi_t xferi;
2503                 snd_xferi_t __user *_xferi = arg;
2504                 snd_pcm_runtime_t *runtime = substream->runtime;
2505                 snd_pcm_sframes_t result;
2506                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2507                         return -EBADFD;
2508                 if (put_user(0, &_xferi->result))
2509                         return -EFAULT;
2510                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2511                         return -EFAULT;
2512                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2513                 __put_user(result, &_xferi->result);
2514                 return result < 0 ? result : 0;
2515         }
2516         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2517         {
2518                 snd_xfern_t xfern;
2519                 snd_xfern_t __user *_xfern = arg;
2520                 snd_pcm_runtime_t *runtime = substream->runtime;
2521                 void __user **bufs;
2522                 snd_pcm_sframes_t result;
2523                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2524                         return -EBADFD;
2525                 if (runtime->channels > 128)
2526                         return -EINVAL;
2527                 if (put_user(0, &_xfern->result))
2528                         return -EFAULT;
2529                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2530                         return -EFAULT;
2531                 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2532                 if (bufs == NULL)
2533                         return -ENOMEM;
2534                 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2535                         kfree(bufs);
2536                         return -EFAULT;
2537                 }
2538                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2539                 kfree(bufs);
2540                 __put_user(result, &_xfern->result);
2541                 return result < 0 ? result : 0;
2542         }
2543         case SNDRV_PCM_IOCTL_REWIND:
2544         {
2545                 snd_pcm_uframes_t frames;
2546                 snd_pcm_uframes_t __user *_frames = arg;
2547                 snd_pcm_sframes_t result;
2548                 if (get_user(frames, _frames))
2549                         return -EFAULT;
2550                 if (put_user(0, _frames))
2551                         return -EFAULT;
2552                 result = snd_pcm_playback_rewind(substream, frames);
2553                 __put_user(result, _frames);
2554                 return result < 0 ? result : 0;
2555         }
2556         case SNDRV_PCM_IOCTL_FORWARD:
2557         {
2558                 snd_pcm_uframes_t frames;
2559                 snd_pcm_uframes_t __user *_frames = arg;
2560                 snd_pcm_sframes_t result;
2561                 if (get_user(frames, _frames))
2562                         return -EFAULT;
2563                 if (put_user(0, _frames))
2564                         return -EFAULT;
2565                 result = snd_pcm_playback_forward(substream, frames);
2566                 __put_user(result, _frames);
2567                 return result < 0 ? result : 0;
2568         }
2569         case SNDRV_PCM_IOCTL_PAUSE:
2570         {
2571                 int res;
2572                 snd_pcm_stream_lock_irq(substream);
2573                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2574                 snd_pcm_stream_unlock_irq(substream);
2575                 return res;
2576         }
2577         }
2578         return snd_pcm_common_ioctl1(substream, cmd, arg);
2579 }
2580
2581 static int snd_pcm_capture_ioctl1(snd_pcm_substream_t *substream,
2582                                   unsigned int cmd, void __user *arg)
2583 {
2584         snd_assert(substream != NULL, return -ENXIO);
2585         snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2586         switch (cmd) {
2587         case SNDRV_PCM_IOCTL_READI_FRAMES:
2588         {
2589                 snd_xferi_t xferi;
2590                 snd_xferi_t __user *_xferi = arg;
2591                 snd_pcm_runtime_t *runtime = substream->runtime;
2592                 snd_pcm_sframes_t result;
2593                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2594                         return -EBADFD;
2595                 if (put_user(0, &_xferi->result))
2596                         return -EFAULT;
2597                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2598                         return -EFAULT;
2599                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2600                 __put_user(result, &_xferi->result);
2601                 return result < 0 ? result : 0;
2602         }
2603         case SNDRV_PCM_IOCTL_READN_FRAMES:
2604         {
2605                 snd_xfern_t xfern;
2606                 snd_xfern_t __user *_xfern = arg;
2607                 snd_pcm_runtime_t *runtime = substream->runtime;
2608                 void *bufs;
2609                 snd_pcm_sframes_t result;
2610                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2611                         return -EBADFD;
2612                 if (runtime->channels > 128)
2613                         return -EINVAL;
2614                 if (put_user(0, &_xfern->result))
2615                         return -EFAULT;
2616                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2617                         return -EFAULT;
2618                 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2619                 if (bufs == NULL)
2620                         return -ENOMEM;
2621                 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2622                         kfree(bufs);
2623                         return -EFAULT;
2624                 }
2625                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2626                 kfree(bufs);
2627                 __put_user(result, &_xfern->result);
2628                 return result < 0 ? result : 0;
2629         }
2630         case SNDRV_PCM_IOCTL_REWIND:
2631         {
2632                 snd_pcm_uframes_t frames;
2633                 snd_pcm_uframes_t __user *_frames = arg;
2634                 snd_pcm_sframes_t result;
2635                 if (get_user(frames, _frames))
2636                         return -EFAULT;
2637                 if (put_user(0, _frames))
2638                         return -EFAULT;
2639                 result = snd_pcm_capture_rewind(substream, frames);
2640                 __put_user(result, _frames);
2641                 return result < 0 ? result : 0;
2642         }
2643         case SNDRV_PCM_IOCTL_FORWARD:
2644         {
2645                 snd_pcm_uframes_t frames;
2646                 snd_pcm_uframes_t __user *_frames = arg;
2647                 snd_pcm_sframes_t result;
2648                 if (get_user(frames, _frames))
2649                         return -EFAULT;
2650                 if (put_user(0, _frames))
2651                         return -EFAULT;
2652                 result = snd_pcm_capture_forward(substream, frames);
2653                 __put_user(result, _frames);
2654                 return result < 0 ? result : 0;
2655         }
2656         }
2657         return snd_pcm_common_ioctl1(substream, cmd, arg);
2658 }
2659
2660 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2661 {
2662         snd_pcm_file_t *pcm_file;
2663
2664         pcm_file = file->private_data;
2665
2666         if (((cmd >> 8) & 0xff) != 'A')
2667                 return -ENOTTY;
2668
2669         return snd_pcm_playback_ioctl1(pcm_file->substream, cmd, (void __user *)arg);
2670 }
2671
2672 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2673 {
2674         snd_pcm_file_t *pcm_file;
2675
2676         pcm_file = file->private_data;
2677
2678         if (((cmd >> 8) & 0xff) != 'A')
2679                 return -ENOTTY;
2680
2681         return snd_pcm_capture_ioctl1(pcm_file->substream, cmd, (void __user *)arg);
2682 }
2683
2684 int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream,
2685                                   unsigned int cmd, void *arg)
2686 {
2687         mm_segment_t fs;
2688         int result;
2689         
2690         fs = snd_enter_user();
2691         result = snd_pcm_playback_ioctl1(substream, cmd, (void __user *)arg);
2692         snd_leave_user(fs);
2693         return result;
2694 }
2695
2696 int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream,
2697                                  unsigned int cmd, void *arg)
2698 {
2699         mm_segment_t fs;
2700         int result;
2701         
2702         fs = snd_enter_user();
2703         result = snd_pcm_capture_ioctl1(substream, cmd, (void __user *)arg);
2704         snd_leave_user(fs);
2705         return result;
2706 }
2707
2708 int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream,
2709                          unsigned int cmd, void *arg)
2710 {
2711         switch (substream->stream) {
2712         case SNDRV_PCM_STREAM_PLAYBACK:
2713                 return snd_pcm_kernel_playback_ioctl(substream, cmd, arg);
2714         case SNDRV_PCM_STREAM_CAPTURE:
2715                 return snd_pcm_kernel_capture_ioctl(substream, cmd, arg);
2716         default:
2717                 return -EINVAL;
2718         }
2719 }
2720
2721 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count, loff_t * offset)
2722 {
2723         snd_pcm_file_t *pcm_file;
2724         snd_pcm_substream_t *substream;
2725         snd_pcm_runtime_t *runtime;
2726         snd_pcm_sframes_t result;
2727
2728         pcm_file = file->private_data;
2729         substream = pcm_file->substream;
2730         snd_assert(substream != NULL, return -ENXIO);
2731         runtime = substream->runtime;
2732         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2733                 return -EBADFD;
2734         if (!frame_aligned(runtime, count))
2735                 return -EINVAL;
2736         count = bytes_to_frames(runtime, count);
2737         result = snd_pcm_lib_read(substream, buf, count);
2738         if (result > 0)
2739                 result = frames_to_bytes(runtime, result);
2740         return result;
2741 }
2742
2743 static ssize_t snd_pcm_write(struct file *file, const char __user *buf, size_t count, loff_t * offset)
2744 {
2745         snd_pcm_file_t *pcm_file;
2746         snd_pcm_substream_t *substream;
2747         snd_pcm_runtime_t *runtime;
2748         snd_pcm_sframes_t result;
2749
2750         pcm_file = file->private_data;
2751         substream = pcm_file->substream;
2752         snd_assert(substream != NULL, result = -ENXIO; goto end);
2753         runtime = substream->runtime;
2754         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2755                 result = -EBADFD;
2756                 goto end;
2757         }
2758         if (!frame_aligned(runtime, count)) {
2759                 result = -EINVAL;
2760                 goto end;
2761         }
2762         count = bytes_to_frames(runtime, count);
2763         result = snd_pcm_lib_write(substream, buf, count);
2764         if (result > 0)
2765                 result = frames_to_bytes(runtime, result);
2766  end:
2767         return result;
2768 }
2769
2770 static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector,
2771                              unsigned long count, loff_t * offset)
2772
2773 {
2774         snd_pcm_file_t *pcm_file;
2775         snd_pcm_substream_t *substream;
2776         snd_pcm_runtime_t *runtime;
2777         snd_pcm_sframes_t result;
2778         unsigned long i;
2779         void __user **bufs;
2780         snd_pcm_uframes_t frames;
2781
2782         pcm_file = file->private_data;
2783         substream = pcm_file->substream;
2784         snd_assert(substream != NULL, return -ENXIO);
2785         runtime = substream->runtime;
2786         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2787                 return -EBADFD;
2788         if (count > 1024 || count != runtime->channels)
2789                 return -EINVAL;
2790         if (!frame_aligned(runtime, _vector->iov_len))
2791                 return -EINVAL;
2792         frames = bytes_to_samples(runtime, _vector->iov_len);
2793         bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2794         if (bufs == NULL)
2795                 return -ENOMEM;
2796         for (i = 0; i < count; ++i)
2797                 bufs[i] = _vector[i].iov_base;
2798         result = snd_pcm_lib_readv(substream, bufs, frames);
2799         if (result > 0)
2800                 result = frames_to_bytes(runtime, result);
2801         kfree(bufs);
2802         return result;
2803 }
2804
2805 static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector,
2806                               unsigned long count, loff_t * offset)
2807 {
2808         snd_pcm_file_t *pcm_file;
2809         snd_pcm_substream_t *substream;
2810         snd_pcm_runtime_t *runtime;
2811         snd_pcm_sframes_t result;
2812         unsigned long i;
2813         void __user **bufs;
2814         snd_pcm_uframes_t frames;
2815
2816         pcm_file = file->private_data;
2817         substream = pcm_file->substream;
2818         snd_assert(substream != NULL, result = -ENXIO; goto end);
2819         runtime = substream->runtime;
2820         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2821                 result = -EBADFD;
2822                 goto end;
2823         }
2824         if (count > 128 || count != runtime->channels ||
2825             !frame_aligned(runtime, _vector->iov_len)) {
2826                 result = -EINVAL;
2827                 goto end;
2828         }
2829         frames = bytes_to_samples(runtime, _vector->iov_len);
2830         bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2831         if (bufs == NULL)
2832                 return -ENOMEM;
2833         for (i = 0; i < count; ++i)
2834                 bufs[i] = _vector[i].iov_base;
2835         result = snd_pcm_lib_writev(substream, bufs, frames);
2836         if (result > 0)
2837                 result = frames_to_bytes(runtime, result);
2838         kfree(bufs);
2839  end:
2840         return result;
2841 }
2842
2843 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2844 {
2845         snd_pcm_file_t *pcm_file;
2846         snd_pcm_substream_t *substream;
2847         snd_pcm_runtime_t *runtime;
2848         unsigned int mask;
2849         snd_pcm_uframes_t avail;
2850
2851         pcm_file = file->private_data;
2852
2853         substream = pcm_file->substream;
2854         snd_assert(substream != NULL, return -ENXIO);
2855         runtime = substream->runtime;
2856
2857         poll_wait(file, &runtime->sleep, wait);
2858
2859         snd_pcm_stream_lock_irq(substream);
2860         avail = snd_pcm_playback_avail(runtime);
2861         switch (runtime->status->state) {
2862         case SNDRV_PCM_STATE_RUNNING:
2863         case SNDRV_PCM_STATE_PREPARED:
2864         case SNDRV_PCM_STATE_PAUSED:
2865                 if (avail >= runtime->control->avail_min) {
2866                         mask = POLLOUT | POLLWRNORM;
2867                         break;
2868                 }
2869                 /* Fall through */
2870         case SNDRV_PCM_STATE_DRAINING:
2871                 mask = 0;
2872                 break;
2873         default:
2874                 mask = POLLOUT | POLLWRNORM | POLLERR;
2875                 break;
2876         }
2877         snd_pcm_stream_unlock_irq(substream);
2878         return mask;
2879 }
2880
2881 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2882 {
2883         snd_pcm_file_t *pcm_file;
2884         snd_pcm_substream_t *substream;
2885         snd_pcm_runtime_t *runtime;
2886         unsigned int mask;
2887         snd_pcm_uframes_t avail;
2888
2889         pcm_file = file->private_data;
2890
2891         substream = pcm_file->substream;
2892         snd_assert(substream != NULL, return -ENXIO);
2893         runtime = substream->runtime;
2894
2895         poll_wait(file, &runtime->sleep, wait);
2896
2897         snd_pcm_stream_lock_irq(substream);
2898         avail = snd_pcm_capture_avail(runtime);
2899         switch (runtime->status->state) {
2900         case SNDRV_PCM_STATE_RUNNING:
2901         case SNDRV_PCM_STATE_PREPARED:
2902         case SNDRV_PCM_STATE_PAUSED:
2903                 if (avail >= runtime->control->avail_min) {
2904                         mask = POLLIN | POLLRDNORM;
2905                         break;
2906                 }
2907                 mask = 0;
2908                 break;
2909         case SNDRV_PCM_STATE_DRAINING:
2910                 if (avail > 0) {
2911                         mask = POLLIN | POLLRDNORM;
2912                         break;
2913                 }
2914                 /* Fall through */
2915         default:
2916                 mask = POLLIN | POLLRDNORM | POLLERR;
2917                 break;
2918         }
2919         snd_pcm_stream_unlock_irq(substream);
2920         return mask;
2921 }
2922
2923 /*
2924  * mmap support
2925  */
2926
2927 /*
2928  * Only on coherent architectures, we can mmap the status and the control records
2929  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
2930  */
2931 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2932 /*
2933  * mmap status record
2934  */
2935 static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area, unsigned long address, int *type)
2936 {
2937         snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
2938         snd_pcm_runtime_t *runtime;
2939         struct page * page;
2940         
2941         if (substream == NULL)
2942                 return NOPAGE_OOM;
2943         runtime = substream->runtime;
2944         page = virt_to_page(runtime->status);
2945         if (!PageReserved(page))
2946                 get_page(page);
2947         if (type)
2948                 *type = VM_FAULT_MINOR;
2949         return page;
2950 }
2951
2952 static struct vm_operations_struct snd_pcm_vm_ops_status =
2953 {
2954         .nopage =       snd_pcm_mmap_status_nopage,
2955 };
2956
2957 static int snd_pcm_mmap_status(snd_pcm_substream_t *substream, struct file *file,
2958                                struct vm_area_struct *area)
2959 {
2960         snd_pcm_runtime_t *runtime;
2961         long size;
2962         if (!(area->vm_flags & VM_READ))
2963                 return -EINVAL;
2964         runtime = substream->runtime;
2965         snd_assert(runtime != NULL, return -EAGAIN);
2966         size = area->vm_end - area->vm_start;
2967         if (size != PAGE_ALIGN(sizeof(snd_pcm_mmap_status_t)))
2968                 return -EINVAL;
2969         area->vm_ops = &snd_pcm_vm_ops_status;
2970         area->vm_private_data = substream;
2971         area->vm_flags |= VM_RESERVED;
2972         return 0;
2973 }
2974
2975 /*
2976  * mmap control record
2977  */
2978 static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area, unsigned long address, int *type)
2979 {
2980         snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
2981         snd_pcm_runtime_t *runtime;
2982         struct page * page;
2983         
2984         if (substream == NULL)
2985                 return NOPAGE_OOM;
2986         runtime = substream->runtime;
2987         page = virt_to_page(runtime->control);
2988         if (!PageReserved(page))
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         if (!PageReserved(page))
3063                 get_page(page);
3064         if (type)
3065                 *type = VM_FAULT_MINOR;
3066         return page;
3067 }
3068
3069 static struct vm_operations_struct snd_pcm_vm_ops_data =
3070 {
3071         .open =         snd_pcm_mmap_data_open,
3072         .close =        snd_pcm_mmap_data_close,
3073         .nopage =       snd_pcm_mmap_data_nopage,
3074 };
3075
3076 /*
3077  * mmap the DMA buffer on RAM
3078  */
3079 static int snd_pcm_default_mmap(snd_pcm_substream_t *substream, struct vm_area_struct *area)
3080 {
3081         area->vm_ops = &snd_pcm_vm_ops_data;
3082         area->vm_private_data = substream;
3083         area->vm_flags |= VM_RESERVED;
3084         atomic_inc(&substream->runtime->mmap_count);
3085         return 0;
3086 }
3087
3088 /*
3089  * mmap the DMA buffer on I/O memory area
3090  */
3091 #if SNDRV_PCM_INFO_MMAP_IOMEM
3092 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3093 {
3094         .open =         snd_pcm_mmap_data_open,
3095         .close =        snd_pcm_mmap_data_close,
3096 };
3097
3098 int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area)
3099 {
3100         long size;
3101         unsigned long offset;
3102
3103 #ifdef pgprot_noncached
3104         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3105 #endif
3106         area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3107         area->vm_private_data = substream;
3108         area->vm_flags |= VM_IO;
3109         size = area->vm_end - area->vm_start;
3110         offset = area->vm_pgoff << PAGE_SHIFT;
3111         if (io_remap_pfn_range(area, area->vm_start,
3112                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3113                                 size, area->vm_page_prot))
3114                 return -EAGAIN;
3115         atomic_inc(&substream->runtime->mmap_count);
3116         return 0;
3117 }
3118 #endif /* SNDRV_PCM_INFO_MMAP */
3119
3120 /*
3121  * mmap DMA buffer
3122  */
3123 int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file,
3124                       struct vm_area_struct *area)
3125 {
3126         snd_pcm_runtime_t *runtime;
3127         long size;
3128         unsigned long offset;
3129         size_t dma_bytes;
3130
3131         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3132                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3133                         return -EINVAL;
3134         } else {
3135                 if (!(area->vm_flags & VM_READ))
3136                         return -EINVAL;
3137         }
3138         runtime = substream->runtime;
3139         snd_assert(runtime != NULL, return -EAGAIN);
3140         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3141                 return -EBADFD;
3142         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3143                 return -ENXIO;
3144         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3145             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3146                 return -EINVAL;
3147         size = area->vm_end - area->vm_start;
3148         offset = area->vm_pgoff << PAGE_SHIFT;
3149         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3150         if ((size_t)size > dma_bytes)
3151                 return -EINVAL;
3152         if (offset > dma_bytes - size)
3153                 return -EINVAL;
3154
3155         if (substream->ops->mmap)
3156                 return substream->ops->mmap(substream, area);
3157         else
3158                 return snd_pcm_default_mmap(substream, area);
3159 }
3160
3161 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3162 {
3163         snd_pcm_file_t * pcm_file;
3164         snd_pcm_substream_t *substream; 
3165         unsigned long offset;
3166         
3167         pcm_file = file->private_data;
3168         substream = pcm_file->substream;
3169         snd_assert(substream != NULL, return -ENXIO);
3170
3171         offset = area->vm_pgoff << PAGE_SHIFT;
3172         switch (offset) {
3173         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3174                 if (substream->no_mmap_ctrl)
3175                         return -ENXIO;
3176                 return snd_pcm_mmap_status(substream, file, area);
3177         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3178                 if (substream->no_mmap_ctrl)
3179                         return -ENXIO;
3180                 return snd_pcm_mmap_control(substream, file, area);
3181         default:
3182                 return snd_pcm_mmap_data(substream, file, area);
3183         }
3184         return 0;
3185 }
3186
3187 static int snd_pcm_fasync(int fd, struct file * file, int on)
3188 {
3189         snd_pcm_file_t * pcm_file;
3190         snd_pcm_substream_t *substream;
3191         snd_pcm_runtime_t *runtime;
3192         int err;
3193
3194         pcm_file = file->private_data;
3195         substream = pcm_file->substream;
3196         snd_assert(substream != NULL, return -ENXIO);
3197         runtime = substream->runtime;
3198
3199         err = fasync_helper(fd, file, on, &runtime->fasync);
3200         if (err < 0)
3201                 return err;
3202         return 0;
3203 }
3204
3205 /*
3206  * ioctl32 compat
3207  */
3208 #ifdef CONFIG_COMPAT
3209 #include "pcm_compat.c"
3210 #else
3211 #define snd_pcm_ioctl_compat    NULL
3212 #endif
3213
3214 /*
3215  *  To be removed helpers to keep binary compatibility
3216  */
3217
3218 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3219 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3220
3221 static void snd_pcm_hw_convert_from_old_params(snd_pcm_hw_params_t *params, struct sndrv_pcm_hw_params_old *oparams)
3222 {
3223         unsigned int i;
3224
3225         memset(params, 0, sizeof(*params));
3226         params->flags = oparams->flags;
3227         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3228                 params->masks[i].bits[0] = oparams->masks[i];
3229         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3230         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3231         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3232         params->info = oparams->info;
3233         params->msbits = oparams->msbits;
3234         params->rate_num = oparams->rate_num;
3235         params->rate_den = oparams->rate_den;
3236         params->fifo_size = oparams->fifo_size;
3237 }
3238
3239 static void snd_pcm_hw_convert_to_old_params(struct sndrv_pcm_hw_params_old *oparams, snd_pcm_hw_params_t *params)
3240 {
3241         unsigned int i;
3242
3243         memset(oparams, 0, sizeof(*oparams));
3244         oparams->flags = params->flags;
3245         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3246                 oparams->masks[i] = params->masks[i].bits[0];
3247         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3248         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3249         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3250         oparams->info = params->info;
3251         oparams->msbits = params->msbits;
3252         oparams->rate_num = params->rate_num;
3253         oparams->rate_den = params->rate_den;
3254         oparams->fifo_size = params->fifo_size;
3255 }
3256
3257 static int snd_pcm_hw_refine_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams)
3258 {
3259         snd_pcm_hw_params_t *params;
3260         struct sndrv_pcm_hw_params_old *oparams = NULL;
3261         int err;
3262
3263         params = kmalloc(sizeof(*params), GFP_KERNEL);
3264         if (!params) {
3265                 err = -ENOMEM;
3266                 goto out;
3267         }
3268         oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3269         if (!oparams) {
3270                 err = -ENOMEM;
3271                 goto out;
3272         }
3273
3274         if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3275                 err = -EFAULT;
3276                 goto out;
3277         }
3278         snd_pcm_hw_convert_from_old_params(params, oparams);
3279         err = snd_pcm_hw_refine(substream, params);
3280         snd_pcm_hw_convert_to_old_params(oparams, params);
3281         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3282                 if (!err)
3283                         err = -EFAULT;
3284         }
3285 out:
3286         kfree(params);
3287         kfree(oparams);
3288         return err;
3289 }
3290
3291 static int snd_pcm_hw_params_old_user(snd_pcm_substream_t * substream, struct sndrv_pcm_hw_params_old __user * _oparams)
3292 {
3293         snd_pcm_hw_params_t *params;
3294         struct sndrv_pcm_hw_params_old *oparams = NULL;
3295         int err;
3296
3297         params = kmalloc(sizeof(*params), GFP_KERNEL);
3298         if (!params) {
3299                 err = -ENOMEM;
3300                 goto out;
3301         }
3302         oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3303         if (!oparams) {
3304                 err = -ENOMEM;
3305                 goto out;
3306         }
3307         if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3308                 err = -EFAULT;
3309                 goto out;
3310         }
3311         snd_pcm_hw_convert_from_old_params(params, oparams);
3312         err = snd_pcm_hw_params(substream, params);
3313         snd_pcm_hw_convert_to_old_params(oparams, params);
3314         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3315                 if (!err)
3316                         err = -EFAULT;
3317         }
3318 out:
3319         kfree(params);
3320         kfree(oparams);
3321         return err;
3322 }
3323
3324 /*
3325  *  Register section
3326  */
3327
3328 static struct file_operations snd_pcm_f_ops_playback = {
3329         .owner =        THIS_MODULE,
3330         .write =        snd_pcm_write,
3331         .writev =       snd_pcm_writev,
3332         .open =         snd_pcm_open,
3333         .release =      snd_pcm_release,
3334         .poll =         snd_pcm_playback_poll,
3335         .unlocked_ioctl =       snd_pcm_playback_ioctl,
3336         .compat_ioctl = snd_pcm_ioctl_compat,
3337         .mmap =         snd_pcm_mmap,
3338         .fasync =       snd_pcm_fasync,
3339 };
3340
3341 static struct file_operations snd_pcm_f_ops_capture = {
3342         .owner =        THIS_MODULE,
3343         .read =         snd_pcm_read,
3344         .readv =        snd_pcm_readv,
3345         .open =         snd_pcm_open,
3346         .release =      snd_pcm_release,
3347         .poll =         snd_pcm_capture_poll,
3348         .unlocked_ioctl =       snd_pcm_capture_ioctl,
3349         .compat_ioctl = snd_pcm_ioctl_compat,
3350         .mmap =         snd_pcm_mmap,
3351         .fasync =       snd_pcm_fasync,
3352 };
3353
3354 snd_minor_t snd_pcm_reg[2] =
3355 {
3356         {
3357                 .comment =      "digital audio playback",
3358                 .f_ops =        &snd_pcm_f_ops_playback,
3359         },
3360         {
3361                 .comment =      "digital audio capture",
3362                 .f_ops =        &snd_pcm_f_ops_capture,
3363         }
3364 };