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