ALSA: Fix invalid jiffies check after pause
[linux-2.6.git] / sound / core / pcm_native.c
1 /*
2  *  Digital Audio (PCM) abstract layer
3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4  *
5  *
6  *   This program is free software; you can redistribute it and/or modify
7  *   it under the terms of the GNU General Public License as published by
8  *   the Free Software Foundation; either version 2 of the License, or
9  *   (at your option) any later version.
10  *
11  *   This program is distributed in the hope that it will be useful,
12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *   GNU General Public License for more details.
15  *
16  *   You should have received a copy of the GNU General Public License
17  *   along with this program; if not, write to the Free Software
18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
19  *
20  */
21
22 #include <linux/mm.h>
23 #include <linux/file.h>
24 #include <linux/slab.h>
25 #include <linux/smp_lock.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos_params.h>
28 #include <linux/uio.h>
29 #include <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 #ifdef CONFIG_SND_SUPPORT_OLD_API
59 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
60 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
61
62 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
63                                       struct snd_pcm_hw_params_old __user * _oparams);
64 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
65                                       struct snd_pcm_hw_params_old __user * _oparams);
66 #endif
67 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
68
69 /*
70  *
71  */
72
73 DEFINE_RWLOCK(snd_pcm_link_rwlock);
74 EXPORT_SYMBOL(snd_pcm_link_rwlock);
75
76 static DECLARE_RWSEM(snd_pcm_link_rwsem);
77
78 static inline mm_segment_t snd_enter_user(void)
79 {
80         mm_segment_t fs = get_fs();
81         set_fs(get_ds());
82         return fs;
83 }
84
85 static inline void snd_leave_user(mm_segment_t fs)
86 {
87         set_fs(fs);
88 }
89
90
91
92 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
93 {
94         struct snd_pcm_runtime *runtime;
95         struct snd_pcm *pcm = substream->pcm;
96         struct snd_pcm_str *pstr = substream->pstr;
97
98         memset(info, 0, sizeof(*info));
99         info->card = pcm->card->number;
100         info->device = pcm->device;
101         info->stream = substream->stream;
102         info->subdevice = substream->number;
103         strlcpy(info->id, pcm->id, sizeof(info->id));
104         strlcpy(info->name, pcm->name, sizeof(info->name));
105         info->dev_class = pcm->dev_class;
106         info->dev_subclass = pcm->dev_subclass;
107         info->subdevices_count = pstr->substream_count;
108         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
109         strlcpy(info->subname, substream->name, sizeof(info->subname));
110         runtime = substream->runtime;
111         /* AB: FIXME!!! This is definitely nonsense */
112         if (runtime) {
113                 info->sync = runtime->sync;
114                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
115         }
116         return 0;
117 }
118
119 int snd_pcm_info_user(struct snd_pcm_substream *substream,
120                       struct snd_pcm_info __user * _info)
121 {
122         struct snd_pcm_info *info;
123         int err;
124
125         info = kmalloc(sizeof(*info), GFP_KERNEL);
126         if (! info)
127                 return -ENOMEM;
128         err = snd_pcm_info(substream, info);
129         if (err >= 0) {
130                 if (copy_to_user(_info, info, sizeof(*info)))
131                         err = -EFAULT;
132         }
133         kfree(info);
134         return err;
135 }
136
137 #undef RULES_DEBUG
138
139 #ifdef RULES_DEBUG
140 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
141 char *snd_pcm_hw_param_names[] = {
142         HW_PARAM(ACCESS),
143         HW_PARAM(FORMAT),
144         HW_PARAM(SUBFORMAT),
145         HW_PARAM(SAMPLE_BITS),
146         HW_PARAM(FRAME_BITS),
147         HW_PARAM(CHANNELS),
148         HW_PARAM(RATE),
149         HW_PARAM(PERIOD_TIME),
150         HW_PARAM(PERIOD_SIZE),
151         HW_PARAM(PERIOD_BYTES),
152         HW_PARAM(PERIODS),
153         HW_PARAM(BUFFER_TIME),
154         HW_PARAM(BUFFER_SIZE),
155         HW_PARAM(BUFFER_BYTES),
156         HW_PARAM(TICK_TIME),
157 };
158 #endif
159
160 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 
161                       struct snd_pcm_hw_params *params)
162 {
163         unsigned int k;
164         struct snd_pcm_hardware *hw;
165         struct snd_interval *i = NULL;
166         struct snd_mask *m = NULL;
167         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
168         unsigned int rstamps[constrs->rules_num];
169         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
170         unsigned int stamp = 2;
171         int changed, again;
172
173         params->info = 0;
174         params->fifo_size = 0;
175         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
176                 params->msbits = 0;
177         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
178                 params->rate_num = 0;
179                 params->rate_den = 0;
180         }
181
182         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
183                 m = hw_param_mask(params, k);
184                 if (snd_mask_empty(m))
185                         return -EINVAL;
186                 if (!(params->rmask & (1 << k)))
187                         continue;
188 #ifdef RULES_DEBUG
189                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
190                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
191 #endif
192                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
193 #ifdef RULES_DEBUG
194                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
195 #endif
196                 if (changed)
197                         params->cmask |= 1 << k;
198                 if (changed < 0)
199                         return changed;
200         }
201
202         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
203                 i = hw_param_interval(params, k);
204                 if (snd_interval_empty(i))
205                         return -EINVAL;
206                 if (!(params->rmask & (1 << k)))
207                         continue;
208 #ifdef RULES_DEBUG
209                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
210                 if (i->empty)
211                         printk("empty");
212                 else
213                         printk("%c%u %u%c", 
214                                i->openmin ? '(' : '[', i->min,
215                                i->max, i->openmax ? ')' : ']');
216                 printk(" -> ");
217 #endif
218                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
219 #ifdef RULES_DEBUG
220                 if (i->empty)
221                         printk("empty\n");
222                 else 
223                         printk("%c%u %u%c\n", 
224                                i->openmin ? '(' : '[', i->min,
225                                i->max, i->openmax ? ')' : ']');
226 #endif
227                 if (changed)
228                         params->cmask |= 1 << k;
229                 if (changed < 0)
230                         return changed;
231         }
232
233         for (k = 0; k < constrs->rules_num; k++)
234                 rstamps[k] = 0;
235         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 
236                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
237         do {
238                 again = 0;
239                 for (k = 0; k < constrs->rules_num; k++) {
240                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
241                         unsigned int d;
242                         int doit = 0;
243                         if (r->cond && !(r->cond & params->flags))
244                                 continue;
245                         for (d = 0; r->deps[d] >= 0; d++) {
246                                 if (vstamps[r->deps[d]] > rstamps[k]) {
247                                         doit = 1;
248                                         break;
249                                 }
250                         }
251                         if (!doit)
252                                 continue;
253 #ifdef RULES_DEBUG
254                         printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
255                         if (r->var >= 0) {
256                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
257                                 if (hw_is_mask(r->var)) {
258                                         m = hw_param_mask(params, r->var);
259                                         printk("%x", *m->bits);
260                                 } else {
261                                         i = hw_param_interval(params, r->var);
262                                         if (i->empty)
263                                                 printk("empty");
264                                         else
265                                                 printk("%c%u %u%c", 
266                                                        i->openmin ? '(' : '[', i->min,
267                                                        i->max, i->openmax ? ')' : ']');
268                                 }
269                         }
270 #endif
271                         changed = r->func(params, r);
272 #ifdef RULES_DEBUG
273                         if (r->var >= 0) {
274                                 printk(" -> ");
275                                 if (hw_is_mask(r->var))
276                                         printk("%x", *m->bits);
277                                 else {
278                                         if (i->empty)
279                                                 printk("empty");
280                                         else
281                                                 printk("%c%u %u%c", 
282                                                        i->openmin ? '(' : '[', i->min,
283                                                        i->max, i->openmax ? ')' : ']');
284                                 }
285                         }
286                         printk("\n");
287 #endif
288                         rstamps[k] = stamp;
289                         if (changed && r->var >= 0) {
290                                 params->cmask |= (1 << r->var);
291                                 vstamps[r->var] = stamp;
292                                 again = 1;
293                         }
294                         if (changed < 0)
295                                 return changed;
296                         stamp++;
297                 }
298         } while (again);
299         if (!params->msbits) {
300                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
301                 if (snd_interval_single(i))
302                         params->msbits = snd_interval_value(i);
303         }
304
305         if (!params->rate_den) {
306                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
307                 if (snd_interval_single(i)) {
308                         params->rate_num = snd_interval_value(i);
309                         params->rate_den = 1;
310                 }
311         }
312
313         hw = &substream->runtime->hw;
314         if (!params->info)
315                 params->info = hw->info;
316         if (!params->fifo_size)
317                 params->fifo_size = hw->fifo_size;
318         params->rmask = 0;
319         return 0;
320 }
321
322 EXPORT_SYMBOL(snd_pcm_hw_refine);
323
324 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
325                                   struct snd_pcm_hw_params __user * _params)
326 {
327         struct snd_pcm_hw_params *params;
328         int err;
329
330         params = memdup_user(_params, sizeof(*params));
331         if (IS_ERR(params))
332                 return PTR_ERR(params);
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
340         kfree(params);
341         return err;
342 }
343
344 static int period_to_usecs(struct snd_pcm_runtime *runtime)
345 {
346         int usecs;
347
348         if (! runtime->rate)
349                 return -1; /* invalid */
350
351         /* take 75% of period time as the deadline */
352         usecs = (750000 / runtime->rate) * runtime->period_size;
353         usecs += ((750000 % runtime->rate) * runtime->period_size) /
354                 runtime->rate;
355
356         return usecs;
357 }
358
359 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
360                              struct snd_pcm_hw_params *params)
361 {
362         struct snd_pcm_runtime *runtime;
363         int err, usecs;
364         unsigned int bits;
365         snd_pcm_uframes_t frames;
366
367         if (PCM_RUNTIME_CHECK(substream))
368                 return -ENXIO;
369         runtime = substream->runtime;
370         snd_pcm_stream_lock_irq(substream);
371         switch (runtime->status->state) {
372         case SNDRV_PCM_STATE_OPEN:
373         case SNDRV_PCM_STATE_SETUP:
374         case SNDRV_PCM_STATE_PREPARED:
375                 break;
376         default:
377                 snd_pcm_stream_unlock_irq(substream);
378                 return -EBADFD;
379         }
380         snd_pcm_stream_unlock_irq(substream);
381 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
382         if (!substream->oss.oss)
383 #endif
384                 if (atomic_read(&substream->mmap_count))
385                         return -EBADFD;
386
387         params->rmask = ~0U;
388         err = snd_pcm_hw_refine(substream, params);
389         if (err < 0)
390                 goto _error;
391
392         err = snd_pcm_hw_params_choose(substream, params);
393         if (err < 0)
394                 goto _error;
395
396         if (substream->ops->hw_params != NULL) {
397                 err = substream->ops->hw_params(substream, params);
398                 if (err < 0)
399                         goto _error;
400         }
401
402         runtime->access = params_access(params);
403         runtime->format = params_format(params);
404         runtime->subformat = params_subformat(params);
405         runtime->channels = params_channels(params);
406         runtime->rate = params_rate(params);
407         runtime->period_size = params_period_size(params);
408         runtime->periods = params_periods(params);
409         runtime->buffer_size = params_buffer_size(params);
410         runtime->info = params->info;
411         runtime->rate_num = params->rate_num;
412         runtime->rate_den = params->rate_den;
413
414         bits = snd_pcm_format_physical_width(runtime->format);
415         runtime->sample_bits = bits;
416         bits *= runtime->channels;
417         runtime->frame_bits = bits;
418         frames = 1;
419         while (bits % 8 != 0) {
420                 bits *= 2;
421                 frames *= 2;
422         }
423         runtime->byte_align = bits / 8;
424         runtime->min_align = frames;
425
426         /* Default sw params */
427         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
428         runtime->period_step = 1;
429         runtime->control->avail_min = runtime->period_size;
430         runtime->start_threshold = 1;
431         runtime->stop_threshold = runtime->buffer_size;
432         runtime->silence_threshold = 0;
433         runtime->silence_size = 0;
434         runtime->boundary = runtime->buffer_size;
435         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
436                 runtime->boundary *= 2;
437
438         snd_pcm_timer_resolution_change(substream);
439         runtime->status->state = SNDRV_PCM_STATE_SETUP;
440
441         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
442                                 substream->latency_id);
443         if ((usecs = period_to_usecs(runtime)) >= 0)
444                 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
445                                         substream->latency_id, usecs);
446         return 0;
447  _error:
448         /* hardware might be unuseable from this time,
449            so we force application to retry to set
450            the correct hardware parameter settings */
451         runtime->status->state = SNDRV_PCM_STATE_OPEN;
452         if (substream->ops->hw_free != NULL)
453                 substream->ops->hw_free(substream);
454         return err;
455 }
456
457 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
458                                   struct snd_pcm_hw_params __user * _params)
459 {
460         struct snd_pcm_hw_params *params;
461         int err;
462
463         params = memdup_user(_params, sizeof(*params));
464         if (IS_ERR(params))
465                 return PTR_ERR(params);
466
467         err = snd_pcm_hw_params(substream, params);
468         if (copy_to_user(_params, params, sizeof(*params))) {
469                 if (!err)
470                         err = -EFAULT;
471         }
472
473         kfree(params);
474         return err;
475 }
476
477 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
478 {
479         struct snd_pcm_runtime *runtime;
480         int result = 0;
481
482         if (PCM_RUNTIME_CHECK(substream))
483                 return -ENXIO;
484         runtime = substream->runtime;
485         snd_pcm_stream_lock_irq(substream);
486         switch (runtime->status->state) {
487         case SNDRV_PCM_STATE_SETUP:
488         case SNDRV_PCM_STATE_PREPARED:
489                 break;
490         default:
491                 snd_pcm_stream_unlock_irq(substream);
492                 return -EBADFD;
493         }
494         snd_pcm_stream_unlock_irq(substream);
495         if (atomic_read(&substream->mmap_count))
496                 return -EBADFD;
497         if (substream->ops->hw_free)
498                 result = substream->ops->hw_free(substream);
499         runtime->status->state = SNDRV_PCM_STATE_OPEN;
500         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
501                 substream->latency_id);
502         return result;
503 }
504
505 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
506                              struct snd_pcm_sw_params *params)
507 {
508         struct snd_pcm_runtime *runtime;
509
510         if (PCM_RUNTIME_CHECK(substream))
511                 return -ENXIO;
512         runtime = substream->runtime;
513         snd_pcm_stream_lock_irq(substream);
514         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
515                 snd_pcm_stream_unlock_irq(substream);
516                 return -EBADFD;
517         }
518         snd_pcm_stream_unlock_irq(substream);
519
520         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
521                 return -EINVAL;
522         if (params->avail_min == 0)
523                 return -EINVAL;
524         if (params->silence_size >= runtime->boundary) {
525                 if (params->silence_threshold != 0)
526                         return -EINVAL;
527         } else {
528                 if (params->silence_size > params->silence_threshold)
529                         return -EINVAL;
530                 if (params->silence_threshold > runtime->buffer_size)
531                         return -EINVAL;
532         }
533         snd_pcm_stream_lock_irq(substream);
534         runtime->tstamp_mode = params->tstamp_mode;
535         runtime->period_step = params->period_step;
536         runtime->control->avail_min = params->avail_min;
537         runtime->start_threshold = params->start_threshold;
538         runtime->stop_threshold = params->stop_threshold;
539         runtime->silence_threshold = params->silence_threshold;
540         runtime->silence_size = params->silence_size;
541         params->boundary = runtime->boundary;
542         if (snd_pcm_running(substream)) {
543                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
544                     runtime->silence_size > 0)
545                         snd_pcm_playback_silence(substream, ULONG_MAX);
546                 wake_up(&runtime->sleep);
547         }
548         snd_pcm_stream_unlock_irq(substream);
549         return 0;
550 }
551
552 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
553                                   struct snd_pcm_sw_params __user * _params)
554 {
555         struct snd_pcm_sw_params params;
556         int err;
557         if (copy_from_user(&params, _params, sizeof(params)))
558                 return -EFAULT;
559         err = snd_pcm_sw_params(substream, &params);
560         if (copy_to_user(_params, &params, sizeof(params)))
561                 return -EFAULT;
562         return err;
563 }
564
565 int snd_pcm_status(struct snd_pcm_substream *substream,
566                    struct snd_pcm_status *status)
567 {
568         struct snd_pcm_runtime *runtime = substream->runtime;
569
570         snd_pcm_stream_lock_irq(substream);
571         status->state = runtime->status->state;
572         status->suspended_state = runtime->status->suspended_state;
573         if (status->state == SNDRV_PCM_STATE_OPEN)
574                 goto _end;
575         status->trigger_tstamp = runtime->trigger_tstamp;
576         if (snd_pcm_running(substream)) {
577                 snd_pcm_update_hw_ptr(substream);
578                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
579                         status->tstamp = runtime->status->tstamp;
580                         goto _tstamp_end;
581                 }
582         }
583         snd_pcm_gettime(runtime, &status->tstamp);
584  _tstamp_end:
585         status->appl_ptr = runtime->control->appl_ptr;
586         status->hw_ptr = runtime->status->hw_ptr;
587         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
588                 status->avail = snd_pcm_playback_avail(runtime);
589                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
590                     runtime->status->state == SNDRV_PCM_STATE_DRAINING)
591                         status->delay = runtime->buffer_size - status->avail;
592                 else
593                         status->delay = 0;
594         } else {
595                 status->avail = snd_pcm_capture_avail(runtime);
596                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
597                         status->delay = status->avail;
598                 else
599                         status->delay = 0;
600         }
601         status->avail_max = runtime->avail_max;
602         status->overrange = runtime->overrange;
603         runtime->avail_max = 0;
604         runtime->overrange = 0;
605  _end:
606         snd_pcm_stream_unlock_irq(substream);
607         return 0;
608 }
609
610 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
611                                struct snd_pcm_status __user * _status)
612 {
613         struct snd_pcm_status status;
614         int res;
615         
616         memset(&status, 0, sizeof(status));
617         res = snd_pcm_status(substream, &status);
618         if (res < 0)
619                 return res;
620         if (copy_to_user(_status, &status, sizeof(status)))
621                 return -EFAULT;
622         return 0;
623 }
624
625 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
626                                 struct snd_pcm_channel_info * info)
627 {
628         struct snd_pcm_runtime *runtime;
629         unsigned int channel;
630         
631         channel = info->channel;
632         runtime = substream->runtime;
633         snd_pcm_stream_lock_irq(substream);
634         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
635                 snd_pcm_stream_unlock_irq(substream);
636                 return -EBADFD;
637         }
638         snd_pcm_stream_unlock_irq(substream);
639         if (channel >= runtime->channels)
640                 return -EINVAL;
641         memset(info, 0, sizeof(*info));
642         info->channel = channel;
643         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
644 }
645
646 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
647                                      struct snd_pcm_channel_info __user * _info)
648 {
649         struct snd_pcm_channel_info info;
650         int res;
651         
652         if (copy_from_user(&info, _info, sizeof(info)))
653                 return -EFAULT;
654         res = snd_pcm_channel_info(substream, &info);
655         if (res < 0)
656                 return res;
657         if (copy_to_user(_info, &info, sizeof(info)))
658                 return -EFAULT;
659         return 0;
660 }
661
662 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
663 {
664         struct snd_pcm_runtime *runtime = substream->runtime;
665         if (runtime->trigger_master == NULL)
666                 return;
667         if (runtime->trigger_master == substream) {
668                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
669         } else {
670                 snd_pcm_trigger_tstamp(runtime->trigger_master);
671                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
672         }
673         runtime->trigger_master = NULL;
674 }
675
676 struct action_ops {
677         int (*pre_action)(struct snd_pcm_substream *substream, int state);
678         int (*do_action)(struct snd_pcm_substream *substream, int state);
679         void (*undo_action)(struct snd_pcm_substream *substream, int state);
680         void (*post_action)(struct snd_pcm_substream *substream, int state);
681 };
682
683 /*
684  *  this functions is core for handling of linked stream
685  *  Note: the stream state might be changed also on failure
686  *  Note2: call with calling stream lock + link lock
687  */
688 static int snd_pcm_action_group(struct action_ops *ops,
689                                 struct snd_pcm_substream *substream,
690                                 int state, int do_lock)
691 {
692         struct snd_pcm_substream *s = NULL;
693         struct snd_pcm_substream *s1;
694         int res = 0;
695
696         snd_pcm_group_for_each_entry(s, substream) {
697                 if (do_lock && s != substream)
698                         spin_lock_nested(&s->self_group.lock,
699                                          SINGLE_DEPTH_NESTING);
700                 res = ops->pre_action(s, state);
701                 if (res < 0)
702                         goto _unlock;
703         }
704         snd_pcm_group_for_each_entry(s, substream) {
705                 res = ops->do_action(s, state);
706                 if (res < 0) {
707                         if (ops->undo_action) {
708                                 snd_pcm_group_for_each_entry(s1, substream) {
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_entry(s, substream) {
719                 ops->post_action(s, state);
720         }
721  _unlock:
722         if (do_lock) {
723                 /* unlock streams */
724                 snd_pcm_group_for_each_entry(s1, substream) {
725                         if (s1 != substream)
726                                 spin_unlock(&s1->self_group.lock);
727                         if (s1 == s)    /* end */
728                                 break;
729                 }
730         }
731         return res;
732 }
733
734 /*
735  *  Note: call with stream lock
736  */
737 static int snd_pcm_action_single(struct action_ops *ops,
738                                  struct snd_pcm_substream *substream,
739                                  int state)
740 {
741         int res;
742         
743         res = ops->pre_action(substream, state);
744         if (res < 0)
745                 return res;
746         res = ops->do_action(substream, state);
747         if (res == 0)
748                 ops->post_action(substream, state);
749         else if (ops->undo_action)
750                 ops->undo_action(substream, state);
751         return res;
752 }
753
754 /*
755  *  Note: call with stream lock
756  */
757 static int snd_pcm_action(struct action_ops *ops,
758                           struct snd_pcm_substream *substream,
759                           int state)
760 {
761         int res;
762
763         if (snd_pcm_stream_linked(substream)) {
764                 if (!spin_trylock(&substream->group->lock)) {
765                         spin_unlock(&substream->self_group.lock);
766                         spin_lock(&substream->group->lock);
767                         spin_lock(&substream->self_group.lock);
768                 }
769                 res = snd_pcm_action_group(ops, substream, state, 1);
770                 spin_unlock(&substream->group->lock);
771         } else {
772                 res = snd_pcm_action_single(ops, substream, state);
773         }
774         return res;
775 }
776
777 /*
778  *  Note: don't use any locks before
779  */
780 static int snd_pcm_action_lock_irq(struct action_ops *ops,
781                                    struct snd_pcm_substream *substream,
782                                    int state)
783 {
784         int res;
785
786         read_lock_irq(&snd_pcm_link_rwlock);
787         if (snd_pcm_stream_linked(substream)) {
788                 spin_lock(&substream->group->lock);
789                 spin_lock(&substream->self_group.lock);
790                 res = snd_pcm_action_group(ops, substream, state, 1);
791                 spin_unlock(&substream->self_group.lock);
792                 spin_unlock(&substream->group->lock);
793         } else {
794                 spin_lock(&substream->self_group.lock);
795                 res = snd_pcm_action_single(ops, substream, state);
796                 spin_unlock(&substream->self_group.lock);
797         }
798         read_unlock_irq(&snd_pcm_link_rwlock);
799         return res;
800 }
801
802 /*
803  */
804 static int snd_pcm_action_nonatomic(struct action_ops *ops,
805                                     struct snd_pcm_substream *substream,
806                                     int state)
807 {
808         int res;
809
810         down_read(&snd_pcm_link_rwsem);
811         if (snd_pcm_stream_linked(substream))
812                 res = snd_pcm_action_group(ops, substream, state, 0);
813         else
814                 res = snd_pcm_action_single(ops, substream, state);
815         up_read(&snd_pcm_link_rwsem);
816         return res;
817 }
818
819 /*
820  * start callbacks
821  */
822 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
823 {
824         struct snd_pcm_runtime *runtime = substream->runtime;
825         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
826                 return -EBADFD;
827         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
828             !snd_pcm_playback_data(substream))
829                 return -EPIPE;
830         runtime->trigger_master = substream;
831         return 0;
832 }
833
834 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
835 {
836         if (substream->runtime->trigger_master != substream)
837                 return 0;
838         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
839 }
840
841 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
842 {
843         if (substream->runtime->trigger_master == substream)
844                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
845 }
846
847 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
848 {
849         struct snd_pcm_runtime *runtime = substream->runtime;
850         snd_pcm_trigger_tstamp(substream);
851         runtime->hw_ptr_jiffies = jiffies;
852         runtime->status->state = state;
853         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
854             runtime->silence_size > 0)
855                 snd_pcm_playback_silence(substream, ULONG_MAX);
856         if (substream->timer)
857                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
858                                  &runtime->trigger_tstamp);
859 }
860
861 static struct action_ops snd_pcm_action_start = {
862         .pre_action = snd_pcm_pre_start,
863         .do_action = snd_pcm_do_start,
864         .undo_action = snd_pcm_undo_start,
865         .post_action = snd_pcm_post_start
866 };
867
868 /**
869  * snd_pcm_start - start all linked streams
870  * @substream: the PCM substream instance
871  */
872 int snd_pcm_start(struct snd_pcm_substream *substream)
873 {
874         return snd_pcm_action(&snd_pcm_action_start, substream,
875                               SNDRV_PCM_STATE_RUNNING);
876 }
877
878 /*
879  * stop callbacks
880  */
881 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
882 {
883         struct snd_pcm_runtime *runtime = substream->runtime;
884         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
885                 return -EBADFD;
886         runtime->trigger_master = substream;
887         return 0;
888 }
889
890 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
891 {
892         if (substream->runtime->trigger_master == substream &&
893             snd_pcm_running(substream))
894                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
895         return 0; /* unconditonally stop all substreams */
896 }
897
898 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
899 {
900         struct snd_pcm_runtime *runtime = substream->runtime;
901         if (runtime->status->state != state) {
902                 snd_pcm_trigger_tstamp(substream);
903                 if (substream->timer)
904                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
905                                          &runtime->trigger_tstamp);
906                 runtime->status->state = state;
907         }
908         wake_up(&runtime->sleep);
909 }
910
911 static struct action_ops snd_pcm_action_stop = {
912         .pre_action = snd_pcm_pre_stop,
913         .do_action = snd_pcm_do_stop,
914         .post_action = snd_pcm_post_stop
915 };
916
917 /**
918  * snd_pcm_stop - try to stop all running streams in the substream group
919  * @substream: the PCM substream instance
920  * @state: PCM state after stopping the stream
921  *
922  * The state of each stream is then changed to the given state unconditionally.
923  */
924 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
925 {
926         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
927 }
928
929 EXPORT_SYMBOL(snd_pcm_stop);
930
931 /**
932  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
933  * @substream: the PCM substream
934  *
935  * After stopping, the state is changed to SETUP.
936  * Unlike snd_pcm_stop(), this affects only the given stream.
937  */
938 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
939 {
940         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
941                                      SNDRV_PCM_STATE_SETUP);
942 }
943
944 /*
945  * pause callbacks
946  */
947 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
948 {
949         struct snd_pcm_runtime *runtime = substream->runtime;
950         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
951                 return -ENOSYS;
952         if (push) {
953                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
954                         return -EBADFD;
955         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
956                 return -EBADFD;
957         runtime->trigger_master = substream;
958         return 0;
959 }
960
961 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
962 {
963         if (substream->runtime->trigger_master != substream)
964                 return 0;
965         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
966          * a delta betwen the current jiffies, this gives a large enough
967          * delta, effectively to skip the check once.
968          */
969         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
970         return substream->ops->trigger(substream,
971                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
972                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
973 }
974
975 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
976 {
977         if (substream->runtime->trigger_master == substream)
978                 substream->ops->trigger(substream,
979                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
980                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
981 }
982
983 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
984 {
985         struct snd_pcm_runtime *runtime = substream->runtime;
986         snd_pcm_trigger_tstamp(substream);
987         if (push) {
988                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
989                 if (substream->timer)
990                         snd_timer_notify(substream->timer,
991                                          SNDRV_TIMER_EVENT_MPAUSE,
992                                          &runtime->trigger_tstamp);
993                 wake_up(&runtime->sleep);
994         } else {
995                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
996                 if (substream->timer)
997                         snd_timer_notify(substream->timer,
998                                          SNDRV_TIMER_EVENT_MCONTINUE,
999                                          &runtime->trigger_tstamp);
1000         }
1001 }
1002
1003 static struct action_ops snd_pcm_action_pause = {
1004         .pre_action = snd_pcm_pre_pause,
1005         .do_action = snd_pcm_do_pause,
1006         .undo_action = snd_pcm_undo_pause,
1007         .post_action = snd_pcm_post_pause
1008 };
1009
1010 /*
1011  * Push/release the pause for all linked streams.
1012  */
1013 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1014 {
1015         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1016 }
1017
1018 #ifdef CONFIG_PM
1019 /* suspend */
1020
1021 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1022 {
1023         struct snd_pcm_runtime *runtime = substream->runtime;
1024         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1025                 return -EBUSY;
1026         runtime->trigger_master = substream;
1027         return 0;
1028 }
1029
1030 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1031 {
1032         struct snd_pcm_runtime *runtime = substream->runtime;
1033         if (runtime->trigger_master != substream)
1034                 return 0;
1035         if (! snd_pcm_running(substream))
1036                 return 0;
1037         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1038         return 0; /* suspend unconditionally */
1039 }
1040
1041 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1042 {
1043         struct snd_pcm_runtime *runtime = substream->runtime;
1044         snd_pcm_trigger_tstamp(substream);
1045         if (substream->timer)
1046                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1047                                  &runtime->trigger_tstamp);
1048         runtime->status->suspended_state = runtime->status->state;
1049         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1050         wake_up(&runtime->sleep);
1051 }
1052
1053 static struct action_ops snd_pcm_action_suspend = {
1054         .pre_action = snd_pcm_pre_suspend,
1055         .do_action = snd_pcm_do_suspend,
1056         .post_action = snd_pcm_post_suspend
1057 };
1058
1059 /**
1060  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1061  * @substream: the PCM substream
1062  *
1063  * After this call, all streams are changed to SUSPENDED state.
1064  */
1065 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1066 {
1067         int err;
1068         unsigned long flags;
1069
1070         if (! substream)
1071                 return 0;
1072
1073         snd_pcm_stream_lock_irqsave(substream, flags);
1074         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1075         snd_pcm_stream_unlock_irqrestore(substream, flags);
1076         return err;
1077 }
1078
1079 EXPORT_SYMBOL(snd_pcm_suspend);
1080
1081 /**
1082  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1083  * @pcm: the PCM instance
1084  *
1085  * After this call, all streams are changed to SUSPENDED state.
1086  */
1087 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1088 {
1089         struct snd_pcm_substream *substream;
1090         int stream, err = 0;
1091
1092         if (! pcm)
1093                 return 0;
1094
1095         for (stream = 0; stream < 2; stream++) {
1096                 for (substream = pcm->streams[stream].substream;
1097                      substream; substream = substream->next) {
1098                         /* FIXME: the open/close code should lock this as well */
1099                         if (substream->runtime == NULL)
1100                                 continue;
1101                         err = snd_pcm_suspend(substream);
1102                         if (err < 0 && err != -EBUSY)
1103                                 return err;
1104                 }
1105         }
1106         return 0;
1107 }
1108
1109 EXPORT_SYMBOL(snd_pcm_suspend_all);
1110
1111 /* resume */
1112
1113 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1114 {
1115         struct snd_pcm_runtime *runtime = substream->runtime;
1116         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1117                 return -ENOSYS;
1118         runtime->trigger_master = substream;
1119         return 0;
1120 }
1121
1122 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1123 {
1124         struct snd_pcm_runtime *runtime = substream->runtime;
1125         if (runtime->trigger_master != substream)
1126                 return 0;
1127         /* DMA not running previously? */
1128         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1129             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1130              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1131                 return 0;
1132         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1133 }
1134
1135 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1136 {
1137         if (substream->runtime->trigger_master == substream &&
1138             snd_pcm_running(substream))
1139                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1140 }
1141
1142 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1143 {
1144         struct snd_pcm_runtime *runtime = substream->runtime;
1145         snd_pcm_trigger_tstamp(substream);
1146         if (substream->timer)
1147                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1148                                  &runtime->trigger_tstamp);
1149         runtime->status->state = runtime->status->suspended_state;
1150 }
1151
1152 static struct action_ops snd_pcm_action_resume = {
1153         .pre_action = snd_pcm_pre_resume,
1154         .do_action = snd_pcm_do_resume,
1155         .undo_action = snd_pcm_undo_resume,
1156         .post_action = snd_pcm_post_resume
1157 };
1158
1159 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1160 {
1161         struct snd_card *card = substream->pcm->card;
1162         int res;
1163
1164         snd_power_lock(card);
1165         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1166                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1167         snd_power_unlock(card);
1168         return res;
1169 }
1170
1171 #else
1172
1173 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1174 {
1175         return -ENOSYS;
1176 }
1177
1178 #endif /* CONFIG_PM */
1179
1180 /*
1181  * xrun ioctl
1182  *
1183  * Change the RUNNING stream(s) to XRUN state.
1184  */
1185 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1186 {
1187         struct snd_card *card = substream->pcm->card;
1188         struct snd_pcm_runtime *runtime = substream->runtime;
1189         int result;
1190
1191         snd_power_lock(card);
1192         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1193                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1194                 if (result < 0)
1195                         goto _unlock;
1196         }
1197
1198         snd_pcm_stream_lock_irq(substream);
1199         switch (runtime->status->state) {
1200         case SNDRV_PCM_STATE_XRUN:
1201                 result = 0;     /* already there */
1202                 break;
1203         case SNDRV_PCM_STATE_RUNNING:
1204                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1205                 break;
1206         default:
1207                 result = -EBADFD;
1208         }
1209         snd_pcm_stream_unlock_irq(substream);
1210  _unlock:
1211         snd_power_unlock(card);
1212         return result;
1213 }
1214
1215 /*
1216  * reset ioctl
1217  */
1218 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1219 {
1220         struct snd_pcm_runtime *runtime = substream->runtime;
1221         switch (runtime->status->state) {
1222         case SNDRV_PCM_STATE_RUNNING:
1223         case SNDRV_PCM_STATE_PREPARED:
1224         case SNDRV_PCM_STATE_PAUSED:
1225         case SNDRV_PCM_STATE_SUSPENDED:
1226                 return 0;
1227         default:
1228                 return -EBADFD;
1229         }
1230 }
1231
1232 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1233 {
1234         struct snd_pcm_runtime *runtime = substream->runtime;
1235         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1236         if (err < 0)
1237                 return err;
1238         runtime->hw_ptr_base = 0;
1239         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1240                 runtime->status->hw_ptr % runtime->period_size;
1241         runtime->silence_start = runtime->status->hw_ptr;
1242         runtime->silence_filled = 0;
1243         return 0;
1244 }
1245
1246 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1247 {
1248         struct snd_pcm_runtime *runtime = substream->runtime;
1249         runtime->control->appl_ptr = runtime->status->hw_ptr;
1250         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1251             runtime->silence_size > 0)
1252                 snd_pcm_playback_silence(substream, ULONG_MAX);
1253 }
1254
1255 static struct action_ops snd_pcm_action_reset = {
1256         .pre_action = snd_pcm_pre_reset,
1257         .do_action = snd_pcm_do_reset,
1258         .post_action = snd_pcm_post_reset
1259 };
1260
1261 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1262 {
1263         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1264 }
1265
1266 /*
1267  * prepare ioctl
1268  */
1269 /* we use the second argument for updating f_flags */
1270 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1271                                int f_flags)
1272 {
1273         struct snd_pcm_runtime *runtime = substream->runtime;
1274         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1275             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1276                 return -EBADFD;
1277         if (snd_pcm_running(substream))
1278                 return -EBUSY;
1279         substream->f_flags = f_flags;
1280         return 0;
1281 }
1282
1283 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1284 {
1285         int err;
1286         err = substream->ops->prepare(substream);
1287         if (err < 0)
1288                 return err;
1289         return snd_pcm_do_reset(substream, 0);
1290 }
1291
1292 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1293 {
1294         struct snd_pcm_runtime *runtime = substream->runtime;
1295         runtime->control->appl_ptr = runtime->status->hw_ptr;
1296         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1297 }
1298
1299 static struct action_ops snd_pcm_action_prepare = {
1300         .pre_action = snd_pcm_pre_prepare,
1301         .do_action = snd_pcm_do_prepare,
1302         .post_action = snd_pcm_post_prepare
1303 };
1304
1305 /**
1306  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1307  * @substream: the PCM substream instance
1308  * @file: file to refer f_flags
1309  */
1310 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1311                            struct file *file)
1312 {
1313         int res;
1314         struct snd_card *card = substream->pcm->card;
1315         int f_flags;
1316
1317         if (file)
1318                 f_flags = file->f_flags;
1319         else
1320                 f_flags = substream->f_flags;
1321
1322         snd_power_lock(card);
1323         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1324                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1325                                                substream, f_flags);
1326         snd_power_unlock(card);
1327         return res;
1328 }
1329
1330 /*
1331  * drain ioctl
1332  */
1333
1334 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1335 {
1336         if (substream->f_flags & O_NONBLOCK)
1337                 return -EAGAIN;
1338         substream->runtime->trigger_master = substream;
1339         return 0;
1340 }
1341
1342 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1343 {
1344         struct snd_pcm_runtime *runtime = substream->runtime;
1345         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1346                 switch (runtime->status->state) {
1347                 case SNDRV_PCM_STATE_PREPARED:
1348                         /* start playback stream if possible */
1349                         if (! snd_pcm_playback_empty(substream)) {
1350                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1351                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1352                         }
1353                         break;
1354                 case SNDRV_PCM_STATE_RUNNING:
1355                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1356                         break;
1357                 default:
1358                         break;
1359                 }
1360         } else {
1361                 /* stop running stream */
1362                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1363                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1364                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1365                         snd_pcm_do_stop(substream, new_state);
1366                         snd_pcm_post_stop(substream, new_state);
1367                 }
1368         }
1369         return 0;
1370 }
1371
1372 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1373 {
1374 }
1375
1376 static struct action_ops snd_pcm_action_drain_init = {
1377         .pre_action = snd_pcm_pre_drain_init,
1378         .do_action = snd_pcm_do_drain_init,
1379         .post_action = snd_pcm_post_drain_init
1380 };
1381
1382 struct drain_rec {
1383         struct snd_pcm_substream *substream;
1384         wait_queue_t wait;
1385         snd_pcm_uframes_t stop_threshold;
1386 };
1387
1388 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1389
1390 /*
1391  * Drain the stream(s).
1392  * When the substream is linked, sync until the draining of all playback streams
1393  * is finished.
1394  * After this call, all streams are supposed to be either SETUP or DRAINING
1395  * (capture only) state.
1396  */
1397 static int snd_pcm_drain(struct snd_pcm_substream *substream)
1398 {
1399         struct snd_card *card;
1400         struct snd_pcm_runtime *runtime;
1401         struct snd_pcm_substream *s;
1402         int result = 0;
1403         int i, num_drecs;
1404         struct drain_rec *drec, drec_tmp, *d;
1405
1406         card = substream->pcm->card;
1407         runtime = substream->runtime;
1408
1409         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1410                 return -EBADFD;
1411
1412         snd_power_lock(card);
1413         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1414                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1415                 if (result < 0) {
1416                         snd_power_unlock(card);
1417                         return result;
1418                 }
1419         }
1420
1421         /* allocate temporary record for drain sync */
1422         down_read(&snd_pcm_link_rwsem);
1423         if (snd_pcm_stream_linked(substream)) {
1424                 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1425                 if (! drec) {
1426                         up_read(&snd_pcm_link_rwsem);
1427                         snd_power_unlock(card);
1428                         return -ENOMEM;
1429                 }
1430         } else
1431                 drec = &drec_tmp;
1432
1433         /* count only playback streams */
1434         num_drecs = 0;
1435         snd_pcm_group_for_each_entry(s, substream) {
1436                 runtime = s->runtime;
1437                 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1438                         d = &drec[num_drecs++];
1439                         d->substream = s;
1440                         init_waitqueue_entry(&d->wait, current);
1441                         add_wait_queue(&runtime->sleep, &d->wait);
1442                         /* stop_threshold fixup to avoid endless loop when
1443                          * stop_threshold > buffer_size
1444                          */
1445                         d->stop_threshold = runtime->stop_threshold;
1446                         if (runtime->stop_threshold > runtime->buffer_size)
1447                                 runtime->stop_threshold = runtime->buffer_size;
1448                 }
1449         }
1450         up_read(&snd_pcm_link_rwsem);
1451
1452         snd_pcm_stream_lock_irq(substream);
1453         /* resume pause */
1454         if (substream->runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1455                 snd_pcm_pause(substream, 0);
1456
1457         /* pre-start/stop - all running streams are changed to DRAINING state */
1458         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1459         if (result < 0) {
1460                 snd_pcm_stream_unlock_irq(substream);
1461                 goto _error;
1462         }
1463
1464         for (;;) {
1465                 long tout;
1466                 if (signal_pending(current)) {
1467                         result = -ERESTARTSYS;
1468                         break;
1469                 }
1470                 /* all finished? */
1471                 for (i = 0; i < num_drecs; i++) {
1472                         runtime = drec[i].substream->runtime;
1473                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1474                                 break;
1475                 }
1476                 if (i == num_drecs)
1477                         break; /* yes, all drained */
1478
1479                 set_current_state(TASK_INTERRUPTIBLE);
1480                 snd_pcm_stream_unlock_irq(substream);
1481                 snd_power_unlock(card);
1482                 tout = schedule_timeout(10 * HZ);
1483                 snd_power_lock(card);
1484                 snd_pcm_stream_lock_irq(substream);
1485                 if (tout == 0) {
1486                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1487                                 result = -ESTRPIPE;
1488                         else {
1489                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1490                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1491                                 result = -EIO;
1492                         }
1493                         break;
1494                 }
1495         }
1496
1497         snd_pcm_stream_unlock_irq(substream);
1498
1499  _error:
1500         for (i = 0; i < num_drecs; i++) {
1501                 d = &drec[i];
1502                 runtime = d->substream->runtime;
1503                 remove_wait_queue(&runtime->sleep, &d->wait);
1504                 runtime->stop_threshold = d->stop_threshold;
1505         }
1506
1507         if (drec != &drec_tmp)
1508                 kfree(drec);
1509         snd_power_unlock(card);
1510
1511         return result;
1512 }
1513
1514 /*
1515  * drop ioctl
1516  *
1517  * Immediately put all linked substreams into SETUP state.
1518  */
1519 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1520 {
1521         struct snd_pcm_runtime *runtime;
1522         struct snd_card *card;
1523         int result = 0;
1524         
1525         if (PCM_RUNTIME_CHECK(substream))
1526                 return -ENXIO;
1527         runtime = substream->runtime;
1528         card = substream->pcm->card;
1529
1530         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1531             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1532             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1533                 return -EBADFD;
1534
1535         snd_pcm_stream_lock_irq(substream);
1536         /* resume pause */
1537         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1538                 snd_pcm_pause(substream, 0);
1539
1540         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1541         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1542         snd_pcm_stream_unlock_irq(substream);
1543
1544         return result;
1545 }
1546
1547
1548 /* WARNING: Don't forget to fput back the file */
1549 static struct file *snd_pcm_file_fd(int fd)
1550 {
1551         struct file *file;
1552         struct inode *inode;
1553         unsigned int minor;
1554
1555         file = fget(fd);
1556         if (!file)
1557                 return NULL;
1558         inode = file->f_path.dentry->d_inode;
1559         if (!S_ISCHR(inode->i_mode) ||
1560             imajor(inode) != snd_major) {
1561                 fput(file);
1562                 return NULL;
1563         }
1564         minor = iminor(inode);
1565         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1566             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1567                 fput(file);
1568                 return NULL;
1569         }
1570         return file;
1571 }
1572
1573 /*
1574  * PCM link handling
1575  */
1576 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1577 {
1578         int res = 0;
1579         struct file *file;
1580         struct snd_pcm_file *pcm_file;
1581         struct snd_pcm_substream *substream1;
1582
1583         file = snd_pcm_file_fd(fd);
1584         if (!file)
1585                 return -EBADFD;
1586         pcm_file = file->private_data;
1587         substream1 = pcm_file->substream;
1588         down_write(&snd_pcm_link_rwsem);
1589         write_lock_irq(&snd_pcm_link_rwlock);
1590         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1591             substream->runtime->status->state != substream1->runtime->status->state) {
1592                 res = -EBADFD;
1593                 goto _end;
1594         }
1595         if (snd_pcm_stream_linked(substream1)) {
1596                 res = -EALREADY;
1597                 goto _end;
1598         }
1599         if (!snd_pcm_stream_linked(substream)) {
1600                 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1601                 if (substream->group == NULL) {
1602                         res = -ENOMEM;
1603                         goto _end;
1604                 }
1605                 spin_lock_init(&substream->group->lock);
1606                 INIT_LIST_HEAD(&substream->group->substreams);
1607                 list_add_tail(&substream->link_list, &substream->group->substreams);
1608                 substream->group->count = 1;
1609         }
1610         list_add_tail(&substream1->link_list, &substream->group->substreams);
1611         substream->group->count++;
1612         substream1->group = substream->group;
1613  _end:
1614         write_unlock_irq(&snd_pcm_link_rwlock);
1615         up_write(&snd_pcm_link_rwsem);
1616         fput(file);
1617         return res;
1618 }
1619
1620 static void relink_to_local(struct snd_pcm_substream *substream)
1621 {
1622         substream->group = &substream->self_group;
1623         INIT_LIST_HEAD(&substream->self_group.substreams);
1624         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1625 }
1626
1627 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1628 {
1629         struct snd_pcm_substream *s;
1630         int res = 0;
1631
1632         down_write(&snd_pcm_link_rwsem);
1633         write_lock_irq(&snd_pcm_link_rwlock);
1634         if (!snd_pcm_stream_linked(substream)) {
1635                 res = -EALREADY;
1636                 goto _end;
1637         }
1638         list_del(&substream->link_list);
1639         substream->group->count--;
1640         if (substream->group->count == 1) {     /* detach the last stream, too */
1641                 snd_pcm_group_for_each_entry(s, substream) {
1642                         relink_to_local(s);
1643                         break;
1644                 }
1645                 kfree(substream->group);
1646         }
1647         relink_to_local(substream);
1648        _end:
1649         write_unlock_irq(&snd_pcm_link_rwlock);
1650         up_write(&snd_pcm_link_rwsem);
1651         return res;
1652 }
1653
1654 /*
1655  * hw configurator
1656  */
1657 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1658                                struct snd_pcm_hw_rule *rule)
1659 {
1660         struct snd_interval t;
1661         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1662                      hw_param_interval_c(params, rule->deps[1]), &t);
1663         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1664 }
1665
1666 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1667                                struct snd_pcm_hw_rule *rule)
1668 {
1669         struct snd_interval t;
1670         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1671                      hw_param_interval_c(params, rule->deps[1]), &t);
1672         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1673 }
1674
1675 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1676                                    struct snd_pcm_hw_rule *rule)
1677 {
1678         struct snd_interval t;
1679         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1680                          hw_param_interval_c(params, rule->deps[1]),
1681                          (unsigned long) rule->private, &t);
1682         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1683 }
1684
1685 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1686                                    struct snd_pcm_hw_rule *rule)
1687 {
1688         struct snd_interval t;
1689         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1690                          (unsigned long) rule->private,
1691                          hw_param_interval_c(params, rule->deps[1]), &t);
1692         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1693 }
1694
1695 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1696                                   struct snd_pcm_hw_rule *rule)
1697 {
1698         unsigned int k;
1699         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1700         struct snd_mask m;
1701         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1702         snd_mask_any(&m);
1703         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1704                 int bits;
1705                 if (! snd_mask_test(mask, k))
1706                         continue;
1707                 bits = snd_pcm_format_physical_width(k);
1708                 if (bits <= 0)
1709                         continue; /* ignore invalid formats */
1710                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1711                         snd_mask_reset(&m, k);
1712         }
1713         return snd_mask_refine(mask, &m);
1714 }
1715
1716 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1717                                        struct snd_pcm_hw_rule *rule)
1718 {
1719         struct snd_interval t;
1720         unsigned int k;
1721         t.min = UINT_MAX;
1722         t.max = 0;
1723         t.openmin = 0;
1724         t.openmax = 0;
1725         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1726                 int bits;
1727                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1728                         continue;
1729                 bits = snd_pcm_format_physical_width(k);
1730                 if (bits <= 0)
1731                         continue; /* ignore invalid formats */
1732                 if (t.min > (unsigned)bits)
1733                         t.min = bits;
1734                 if (t.max < (unsigned)bits)
1735                         t.max = bits;
1736         }
1737         t.integer = 1;
1738         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1739 }
1740
1741 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1742 #error "Change this table"
1743 #endif
1744
1745 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1746                                  48000, 64000, 88200, 96000, 176400, 192000 };
1747
1748 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1749         .count = ARRAY_SIZE(rates),
1750         .list = rates,
1751 };
1752
1753 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1754                                 struct snd_pcm_hw_rule *rule)
1755 {
1756         struct snd_pcm_hardware *hw = rule->private;
1757         return snd_interval_list(hw_param_interval(params, rule->var),
1758                                  snd_pcm_known_rates.count,
1759                                  snd_pcm_known_rates.list, hw->rates);
1760 }               
1761
1762 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1763                                             struct snd_pcm_hw_rule *rule)
1764 {
1765         struct snd_interval t;
1766         struct snd_pcm_substream *substream = rule->private;
1767         t.min = 0;
1768         t.max = substream->buffer_bytes_max;
1769         t.openmin = 0;
1770         t.openmax = 0;
1771         t.integer = 1;
1772         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1773 }               
1774
1775 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1776 {
1777         struct snd_pcm_runtime *runtime = substream->runtime;
1778         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1779         int k, err;
1780
1781         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1782                 snd_mask_any(constrs_mask(constrs, k));
1783         }
1784
1785         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1786                 snd_interval_any(constrs_interval(constrs, k));
1787         }
1788
1789         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1790         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1791         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1792         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1793         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1794
1795         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1796                                    snd_pcm_hw_rule_format, NULL,
1797                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1798         if (err < 0)
1799                 return err;
1800         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1801                                   snd_pcm_hw_rule_sample_bits, NULL,
1802                                   SNDRV_PCM_HW_PARAM_FORMAT, 
1803                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1804         if (err < 0)
1805                 return err;
1806         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1807                                   snd_pcm_hw_rule_div, NULL,
1808                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1809         if (err < 0)
1810                 return err;
1811         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1812                                   snd_pcm_hw_rule_mul, NULL,
1813                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1814         if (err < 0)
1815                 return err;
1816         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1817                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1818                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1819         if (err < 0)
1820                 return err;
1821         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1822                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1823                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1824         if (err < 0)
1825                 return err;
1826         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 
1827                                   snd_pcm_hw_rule_div, NULL,
1828                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1829         if (err < 0)
1830                 return err;
1831         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1832                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1833                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1834         if (err < 0)
1835                 return err;
1836         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1837                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1838                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1839         if (err < 0)
1840                 return err;
1841         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 
1842                                   snd_pcm_hw_rule_div, NULL,
1843                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1844         if (err < 0)
1845                 return err;
1846         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1847                                   snd_pcm_hw_rule_div, NULL,
1848                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1849         if (err < 0)
1850                 return err;
1851         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1852                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1853                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1854         if (err < 0)
1855                 return err;
1856         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1857                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1858                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1859         if (err < 0)
1860                 return err;
1861         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1862                                   snd_pcm_hw_rule_mul, NULL,
1863                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1864         if (err < 0)
1865                 return err;
1866         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1867                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1868                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1869         if (err < 0)
1870                 return err;
1871         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1872                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1873                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1874         if (err < 0)
1875                 return err;
1876         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 
1877                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1878                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1879         if (err < 0)
1880                 return err;
1881         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
1882                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1883                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1884         if (err < 0)
1885                 return err;
1886         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 
1887                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1888                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1889         if (err < 0)
1890                 return err;
1891         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 
1892                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1893                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1894         if (err < 0)
1895                 return err;
1896         return 0;
1897 }
1898
1899 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1900 {
1901         struct snd_pcm_runtime *runtime = substream->runtime;
1902         struct snd_pcm_hardware *hw = &runtime->hw;
1903         int err;
1904         unsigned int mask = 0;
1905
1906         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1907                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1908         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1909                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1910         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1911                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1912                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1913                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1914                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1915                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1916                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1917         }
1918         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1919         if (err < 0)
1920                 return err;
1921
1922         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1923         if (err < 0)
1924                 return err;
1925
1926         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1927         if (err < 0)
1928                 return err;
1929
1930         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1931                                            hw->channels_min, hw->channels_max);
1932         if (err < 0)
1933                 return err;
1934
1935         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1936                                            hw->rate_min, hw->rate_max);
1937          if (err < 0)
1938                  return err;
1939
1940         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1941                                            hw->period_bytes_min, hw->period_bytes_max);
1942          if (err < 0)
1943                  return err;
1944
1945         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1946                                            hw->periods_min, hw->periods_max);
1947         if (err < 0)
1948                 return err;
1949
1950         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1951                                            hw->period_bytes_min, hw->buffer_bytes_max);
1952         if (err < 0)
1953                 return err;
1954
1955         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
1956                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1957                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1958         if (err < 0)
1959                 return err;
1960
1961         /* FIXME: remove */
1962         if (runtime->dma_bytes) {
1963                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1964                 if (err < 0)
1965                         return -EINVAL;
1966         }
1967
1968         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1969                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1970                                           snd_pcm_hw_rule_rate, hw,
1971                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1972                 if (err < 0)
1973                         return err;
1974         }
1975
1976         /* FIXME: this belong to lowlevel */
1977         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1978
1979         return 0;
1980 }
1981
1982 static void pcm_release_private(struct snd_pcm_substream *substream)
1983 {
1984         snd_pcm_unlink(substream);
1985 }
1986
1987 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1988 {
1989         substream->ref_count--;
1990         if (substream->ref_count > 0)
1991                 return;
1992
1993         snd_pcm_drop(substream);
1994         if (substream->hw_opened) {
1995                 if (substream->ops->hw_free != NULL)
1996                         substream->ops->hw_free(substream);
1997                 substream->ops->close(substream);
1998                 substream->hw_opened = 0;
1999         }
2000         if (substream->pcm_release) {
2001                 substream->pcm_release(substream);
2002                 substream->pcm_release = NULL;
2003         }
2004         snd_pcm_detach_substream(substream);
2005 }
2006
2007 EXPORT_SYMBOL(snd_pcm_release_substream);
2008
2009 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2010                            struct file *file,
2011                            struct snd_pcm_substream **rsubstream)
2012 {
2013         struct snd_pcm_substream *substream;
2014         int err;
2015
2016         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2017         if (err < 0)
2018                 return err;
2019         if (substream->ref_count > 1) {
2020                 *rsubstream = substream;
2021                 return 0;
2022         }
2023
2024         err = snd_pcm_hw_constraints_init(substream);
2025         if (err < 0) {
2026                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2027                 goto error;
2028         }
2029
2030         if ((err = substream->ops->open(substream)) < 0)
2031                 goto error;
2032
2033         substream->hw_opened = 1;
2034
2035         err = snd_pcm_hw_constraints_complete(substream);
2036         if (err < 0) {
2037                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2038                 goto error;
2039         }
2040
2041         *rsubstream = substream;
2042         return 0;
2043
2044  error:
2045         snd_pcm_release_substream(substream);
2046         return err;
2047 }
2048
2049 EXPORT_SYMBOL(snd_pcm_open_substream);
2050
2051 static int snd_pcm_open_file(struct file *file,
2052                              struct snd_pcm *pcm,
2053                              int stream,
2054                              struct snd_pcm_file **rpcm_file)
2055 {
2056         struct snd_pcm_file *pcm_file;
2057         struct snd_pcm_substream *substream;
2058         struct snd_pcm_str *str;
2059         int err;
2060
2061         if (rpcm_file)
2062                 *rpcm_file = NULL;
2063
2064         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2065         if (err < 0)
2066                 return err;
2067
2068         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2069         if (pcm_file == NULL) {
2070                 snd_pcm_release_substream(substream);
2071                 return -ENOMEM;
2072         }
2073         pcm_file->substream = substream;
2074         if (substream->ref_count == 1) {
2075                 str = substream->pstr;
2076                 substream->file = pcm_file;
2077                 substream->pcm_release = pcm_release_private;
2078         }
2079         file->private_data = pcm_file;
2080         if (rpcm_file)
2081                 *rpcm_file = pcm_file;
2082         return 0;
2083 }
2084
2085 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2086 {
2087         struct snd_pcm *pcm;
2088
2089         pcm = snd_lookup_minor_data(iminor(inode),
2090                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2091         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2092 }
2093
2094 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2095 {
2096         struct snd_pcm *pcm;
2097
2098         pcm = snd_lookup_minor_data(iminor(inode),
2099                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2100         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2101 }
2102
2103 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2104 {
2105         int err;
2106         struct snd_pcm_file *pcm_file;
2107         wait_queue_t wait;
2108
2109         if (pcm == NULL) {
2110                 err = -ENODEV;
2111                 goto __error1;
2112         }
2113         err = snd_card_file_add(pcm->card, file);
2114         if (err < 0)
2115                 goto __error1;
2116         if (!try_module_get(pcm->card->module)) {
2117                 err = -EFAULT;
2118                 goto __error2;
2119         }
2120         init_waitqueue_entry(&wait, current);
2121         add_wait_queue(&pcm->open_wait, &wait);
2122         mutex_lock(&pcm->open_mutex);
2123         while (1) {
2124                 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2125                 if (err >= 0)
2126                         break;
2127                 if (err == -EAGAIN) {
2128                         if (file->f_flags & O_NONBLOCK) {
2129                                 err = -EBUSY;
2130                                 break;
2131                         }
2132                 } else
2133                         break;
2134                 set_current_state(TASK_INTERRUPTIBLE);
2135                 mutex_unlock(&pcm->open_mutex);
2136                 schedule();
2137                 mutex_lock(&pcm->open_mutex);
2138                 if (signal_pending(current)) {
2139                         err = -ERESTARTSYS;
2140                         break;
2141                 }
2142         }
2143         remove_wait_queue(&pcm->open_wait, &wait);
2144         mutex_unlock(&pcm->open_mutex);
2145         if (err < 0)
2146                 goto __error;
2147         return err;
2148
2149       __error:
2150         module_put(pcm->card->module);
2151       __error2:
2152         snd_card_file_remove(pcm->card, file);
2153       __error1:
2154         return err;
2155 }
2156
2157 static int snd_pcm_release(struct inode *inode, struct file *file)
2158 {
2159         struct snd_pcm *pcm;
2160         struct snd_pcm_substream *substream;
2161         struct snd_pcm_file *pcm_file;
2162
2163         pcm_file = file->private_data;
2164         substream = pcm_file->substream;
2165         if (snd_BUG_ON(!substream))
2166                 return -ENXIO;
2167         pcm = substream->pcm;
2168         mutex_lock(&pcm->open_mutex);
2169         snd_pcm_release_substream(substream);
2170         kfree(pcm_file);
2171         mutex_unlock(&pcm->open_mutex);
2172         wake_up(&pcm->open_wait);
2173         module_put(pcm->card->module);
2174         snd_card_file_remove(pcm->card, file);
2175         return 0;
2176 }
2177
2178 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2179                                                  snd_pcm_uframes_t frames)
2180 {
2181         struct snd_pcm_runtime *runtime = substream->runtime;
2182         snd_pcm_sframes_t appl_ptr;
2183         snd_pcm_sframes_t ret;
2184         snd_pcm_sframes_t hw_avail;
2185
2186         if (frames == 0)
2187                 return 0;
2188
2189         snd_pcm_stream_lock_irq(substream);
2190         switch (runtime->status->state) {
2191         case SNDRV_PCM_STATE_PREPARED:
2192                 break;
2193         case SNDRV_PCM_STATE_DRAINING:
2194         case SNDRV_PCM_STATE_RUNNING:
2195                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2196                         break;
2197                 /* Fall through */
2198         case SNDRV_PCM_STATE_XRUN:
2199                 ret = -EPIPE;
2200                 goto __end;
2201         default:
2202                 ret = -EBADFD;
2203                 goto __end;
2204         }
2205
2206         hw_avail = snd_pcm_playback_hw_avail(runtime);
2207         if (hw_avail <= 0) {
2208                 ret = 0;
2209                 goto __end;
2210         }
2211         if (frames > (snd_pcm_uframes_t)hw_avail)
2212                 frames = hw_avail;
2213         appl_ptr = runtime->control->appl_ptr - frames;
2214         if (appl_ptr < 0)
2215                 appl_ptr += runtime->boundary;
2216         runtime->control->appl_ptr = appl_ptr;
2217         ret = frames;
2218  __end:
2219         snd_pcm_stream_unlock_irq(substream);
2220         return ret;
2221 }
2222
2223 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2224                                                 snd_pcm_uframes_t frames)
2225 {
2226         struct snd_pcm_runtime *runtime = substream->runtime;
2227         snd_pcm_sframes_t appl_ptr;
2228         snd_pcm_sframes_t ret;
2229         snd_pcm_sframes_t hw_avail;
2230
2231         if (frames == 0)
2232                 return 0;
2233
2234         snd_pcm_stream_lock_irq(substream);
2235         switch (runtime->status->state) {
2236         case SNDRV_PCM_STATE_PREPARED:
2237         case SNDRV_PCM_STATE_DRAINING:
2238                 break;
2239         case SNDRV_PCM_STATE_RUNNING:
2240                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2241                         break;
2242                 /* Fall through */
2243         case SNDRV_PCM_STATE_XRUN:
2244                 ret = -EPIPE;
2245                 goto __end;
2246         default:
2247                 ret = -EBADFD;
2248                 goto __end;
2249         }
2250
2251         hw_avail = snd_pcm_capture_hw_avail(runtime);
2252         if (hw_avail <= 0) {
2253                 ret = 0;
2254                 goto __end;
2255         }
2256         if (frames > (snd_pcm_uframes_t)hw_avail)
2257                 frames = hw_avail;
2258         appl_ptr = runtime->control->appl_ptr - frames;
2259         if (appl_ptr < 0)
2260                 appl_ptr += runtime->boundary;
2261         runtime->control->appl_ptr = appl_ptr;
2262         ret = frames;
2263  __end:
2264         snd_pcm_stream_unlock_irq(substream);
2265         return ret;
2266 }
2267
2268 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2269                                                   snd_pcm_uframes_t frames)
2270 {
2271         struct snd_pcm_runtime *runtime = substream->runtime;
2272         snd_pcm_sframes_t appl_ptr;
2273         snd_pcm_sframes_t ret;
2274         snd_pcm_sframes_t avail;
2275
2276         if (frames == 0)
2277                 return 0;
2278
2279         snd_pcm_stream_lock_irq(substream);
2280         switch (runtime->status->state) {
2281         case SNDRV_PCM_STATE_PREPARED:
2282         case SNDRV_PCM_STATE_PAUSED:
2283                 break;
2284         case SNDRV_PCM_STATE_DRAINING:
2285         case SNDRV_PCM_STATE_RUNNING:
2286                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2287                         break;
2288                 /* Fall through */
2289         case SNDRV_PCM_STATE_XRUN:
2290                 ret = -EPIPE;
2291                 goto __end;
2292         default:
2293                 ret = -EBADFD;
2294                 goto __end;
2295         }
2296
2297         avail = snd_pcm_playback_avail(runtime);
2298         if (avail <= 0) {
2299                 ret = 0;
2300                 goto __end;
2301         }
2302         if (frames > (snd_pcm_uframes_t)avail)
2303                 frames = avail;
2304         appl_ptr = runtime->control->appl_ptr + frames;
2305         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2306                 appl_ptr -= runtime->boundary;
2307         runtime->control->appl_ptr = appl_ptr;
2308         ret = frames;
2309  __end:
2310         snd_pcm_stream_unlock_irq(substream);
2311         return ret;
2312 }
2313
2314 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2315                                                  snd_pcm_uframes_t frames)
2316 {
2317         struct snd_pcm_runtime *runtime = substream->runtime;
2318         snd_pcm_sframes_t appl_ptr;
2319         snd_pcm_sframes_t ret;
2320         snd_pcm_sframes_t avail;
2321
2322         if (frames == 0)
2323                 return 0;
2324
2325         snd_pcm_stream_lock_irq(substream);
2326         switch (runtime->status->state) {
2327         case SNDRV_PCM_STATE_PREPARED:
2328         case SNDRV_PCM_STATE_DRAINING:
2329         case SNDRV_PCM_STATE_PAUSED:
2330                 break;
2331         case SNDRV_PCM_STATE_RUNNING:
2332                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2333                         break;
2334                 /* Fall through */
2335         case SNDRV_PCM_STATE_XRUN:
2336                 ret = -EPIPE;
2337                 goto __end;
2338         default:
2339                 ret = -EBADFD;
2340                 goto __end;
2341         }
2342
2343         avail = snd_pcm_capture_avail(runtime);
2344         if (avail <= 0) {
2345                 ret = 0;
2346                 goto __end;
2347         }
2348         if (frames > (snd_pcm_uframes_t)avail)
2349                 frames = avail;
2350         appl_ptr = runtime->control->appl_ptr + frames;
2351         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2352                 appl_ptr -= runtime->boundary;
2353         runtime->control->appl_ptr = appl_ptr;
2354         ret = frames;
2355  __end:
2356         snd_pcm_stream_unlock_irq(substream);
2357         return ret;
2358 }
2359
2360 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2361 {
2362         struct snd_pcm_runtime *runtime = substream->runtime;
2363         int err;
2364
2365         snd_pcm_stream_lock_irq(substream);
2366         switch (runtime->status->state) {
2367         case SNDRV_PCM_STATE_DRAINING:
2368                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2369                         goto __badfd;
2370         case SNDRV_PCM_STATE_RUNNING:
2371                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2372                         break;
2373                 /* Fall through */
2374         case SNDRV_PCM_STATE_PREPARED:
2375         case SNDRV_PCM_STATE_SUSPENDED:
2376                 err = 0;
2377                 break;
2378         case SNDRV_PCM_STATE_XRUN:
2379                 err = -EPIPE;
2380                 break;
2381         default:
2382               __badfd:
2383                 err = -EBADFD;
2384                 break;
2385         }
2386         snd_pcm_stream_unlock_irq(substream);
2387         return err;
2388 }
2389                 
2390 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2391                          snd_pcm_sframes_t __user *res)
2392 {
2393         struct snd_pcm_runtime *runtime = substream->runtime;
2394         int err;
2395         snd_pcm_sframes_t n = 0;
2396
2397         snd_pcm_stream_lock_irq(substream);
2398         switch (runtime->status->state) {
2399         case SNDRV_PCM_STATE_DRAINING:
2400                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2401                         goto __badfd;
2402         case SNDRV_PCM_STATE_RUNNING:
2403                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2404                         break;
2405                 /* Fall through */
2406         case SNDRV_PCM_STATE_PREPARED:
2407         case SNDRV_PCM_STATE_SUSPENDED:
2408                 err = 0;
2409                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2410                         n = snd_pcm_playback_hw_avail(runtime);
2411                 else
2412                         n = snd_pcm_capture_avail(runtime);
2413                 break;
2414         case SNDRV_PCM_STATE_XRUN:
2415                 err = -EPIPE;
2416                 break;
2417         default:
2418               __badfd:
2419                 err = -EBADFD;
2420                 break;
2421         }
2422         snd_pcm_stream_unlock_irq(substream);
2423         if (!err)
2424                 if (put_user(n, res))
2425                         err = -EFAULT;
2426         return err;
2427 }
2428                 
2429 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2430                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2431 {
2432         struct snd_pcm_runtime *runtime = substream->runtime;
2433         struct snd_pcm_sync_ptr sync_ptr;
2434         volatile struct snd_pcm_mmap_status *status;
2435         volatile struct snd_pcm_mmap_control *control;
2436         int err;
2437
2438         memset(&sync_ptr, 0, sizeof(sync_ptr));
2439         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2440                 return -EFAULT;
2441         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2442                 return -EFAULT; 
2443         status = runtime->status;
2444         control = runtime->control;
2445         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2446                 err = snd_pcm_hwsync(substream);
2447                 if (err < 0)
2448                         return err;
2449         }
2450         snd_pcm_stream_lock_irq(substream);
2451         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2452                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2453         else
2454                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2455         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2456                 control->avail_min = sync_ptr.c.control.avail_min;
2457         else
2458                 sync_ptr.c.control.avail_min = control->avail_min;
2459         sync_ptr.s.status.state = status->state;
2460         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2461         sync_ptr.s.status.tstamp = status->tstamp;
2462         sync_ptr.s.status.suspended_state = status->suspended_state;
2463         snd_pcm_stream_unlock_irq(substream);
2464         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2465                 return -EFAULT;
2466         return 0;
2467 }
2468
2469 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2470 {
2471         struct snd_pcm_runtime *runtime = substream->runtime;
2472         int arg;
2473         
2474         if (get_user(arg, _arg))
2475                 return -EFAULT;
2476         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2477                 return -EINVAL;
2478         runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2479         if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2480                 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2481         return 0;
2482 }
2483                 
2484 static int snd_pcm_common_ioctl1(struct file *file,
2485                                  struct snd_pcm_substream *substream,
2486                                  unsigned int cmd, void __user *arg)
2487 {
2488         switch (cmd) {
2489         case SNDRV_PCM_IOCTL_PVERSION:
2490                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2491         case SNDRV_PCM_IOCTL_INFO:
2492                 return snd_pcm_info_user(substream, arg);
2493         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2494                 return 0;
2495         case SNDRV_PCM_IOCTL_TTSTAMP:
2496                 return snd_pcm_tstamp(substream, arg);
2497         case SNDRV_PCM_IOCTL_HW_REFINE:
2498                 return snd_pcm_hw_refine_user(substream, arg);
2499         case SNDRV_PCM_IOCTL_HW_PARAMS:
2500                 return snd_pcm_hw_params_user(substream, arg);
2501         case SNDRV_PCM_IOCTL_HW_FREE:
2502                 return snd_pcm_hw_free(substream);
2503         case SNDRV_PCM_IOCTL_SW_PARAMS:
2504                 return snd_pcm_sw_params_user(substream, arg);
2505         case SNDRV_PCM_IOCTL_STATUS:
2506                 return snd_pcm_status_user(substream, arg);
2507         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2508                 return snd_pcm_channel_info_user(substream, arg);
2509         case SNDRV_PCM_IOCTL_PREPARE:
2510                 return snd_pcm_prepare(substream, file);
2511         case SNDRV_PCM_IOCTL_RESET:
2512                 return snd_pcm_reset(substream);
2513         case SNDRV_PCM_IOCTL_START:
2514                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2515         case SNDRV_PCM_IOCTL_LINK:
2516                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2517         case SNDRV_PCM_IOCTL_UNLINK:
2518                 return snd_pcm_unlink(substream);
2519         case SNDRV_PCM_IOCTL_RESUME:
2520                 return snd_pcm_resume(substream);
2521         case SNDRV_PCM_IOCTL_XRUN:
2522                 return snd_pcm_xrun(substream);
2523         case SNDRV_PCM_IOCTL_HWSYNC:
2524                 return snd_pcm_hwsync(substream);
2525         case SNDRV_PCM_IOCTL_DELAY:
2526                 return snd_pcm_delay(substream, arg);
2527         case SNDRV_PCM_IOCTL_SYNC_PTR:
2528                 return snd_pcm_sync_ptr(substream, arg);
2529 #ifdef CONFIG_SND_SUPPORT_OLD_API
2530         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2531                 return snd_pcm_hw_refine_old_user(substream, arg);
2532         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2533                 return snd_pcm_hw_params_old_user(substream, arg);
2534 #endif
2535         case SNDRV_PCM_IOCTL_DRAIN:
2536                 return snd_pcm_drain(substream);
2537         case SNDRV_PCM_IOCTL_DROP:
2538                 return snd_pcm_drop(substream);
2539         case SNDRV_PCM_IOCTL_PAUSE:
2540         {
2541                 int res;
2542                 snd_pcm_stream_lock_irq(substream);
2543                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2544                 snd_pcm_stream_unlock_irq(substream);
2545                 return res;
2546         }
2547         }
2548         snd_printd("unknown ioctl = 0x%x\n", cmd);
2549         return -ENOTTY;
2550 }
2551
2552 static int snd_pcm_playback_ioctl1(struct file *file,
2553                                    struct snd_pcm_substream *substream,
2554                                    unsigned int cmd, void __user *arg)
2555 {
2556         if (snd_BUG_ON(!substream))
2557                 return -ENXIO;
2558         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2559                 return -EINVAL;
2560         switch (cmd) {
2561         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2562         {
2563                 struct snd_xferi xferi;
2564                 struct snd_xferi __user *_xferi = arg;
2565                 struct snd_pcm_runtime *runtime = substream->runtime;
2566                 snd_pcm_sframes_t result;
2567                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2568                         return -EBADFD;
2569                 if (put_user(0, &_xferi->result))
2570                         return -EFAULT;
2571                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2572                         return -EFAULT;
2573                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2574                 __put_user(result, &_xferi->result);
2575                 return result < 0 ? result : 0;
2576         }
2577         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2578         {
2579                 struct snd_xfern xfern;
2580                 struct snd_xfern __user *_xfern = arg;
2581                 struct snd_pcm_runtime *runtime = substream->runtime;
2582                 void __user **bufs;
2583                 snd_pcm_sframes_t result;
2584                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2585                         return -EBADFD;
2586                 if (runtime->channels > 128)
2587                         return -EINVAL;
2588                 if (put_user(0, &_xfern->result))
2589                         return -EFAULT;
2590                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2591                         return -EFAULT;
2592
2593                 bufs = memdup_user(xfern.bufs,
2594                                    sizeof(void *) * runtime->channels);
2595                 if (IS_ERR(bufs))
2596                         return PTR_ERR(bufs);
2597                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2598                 kfree(bufs);
2599                 __put_user(result, &_xfern->result);
2600                 return result < 0 ? result : 0;
2601         }
2602         case SNDRV_PCM_IOCTL_REWIND:
2603         {
2604                 snd_pcm_uframes_t frames;
2605                 snd_pcm_uframes_t __user *_frames = arg;
2606                 snd_pcm_sframes_t result;
2607                 if (get_user(frames, _frames))
2608                         return -EFAULT;
2609                 if (put_user(0, _frames))
2610                         return -EFAULT;
2611                 result = snd_pcm_playback_rewind(substream, frames);
2612                 __put_user(result, _frames);
2613                 return result < 0 ? result : 0;
2614         }
2615         case SNDRV_PCM_IOCTL_FORWARD:
2616         {
2617                 snd_pcm_uframes_t frames;
2618                 snd_pcm_uframes_t __user *_frames = arg;
2619                 snd_pcm_sframes_t result;
2620                 if (get_user(frames, _frames))
2621                         return -EFAULT;
2622                 if (put_user(0, _frames))
2623                         return -EFAULT;
2624                 result = snd_pcm_playback_forward(substream, frames);
2625                 __put_user(result, _frames);
2626                 return result < 0 ? result : 0;
2627         }
2628         }
2629         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2630 }
2631
2632 static int snd_pcm_capture_ioctl1(struct file *file,
2633                                   struct snd_pcm_substream *substream,
2634                                   unsigned int cmd, void __user *arg)
2635 {
2636         if (snd_BUG_ON(!substream))
2637                 return -ENXIO;
2638         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2639                 return -EINVAL;
2640         switch (cmd) {
2641         case SNDRV_PCM_IOCTL_READI_FRAMES:
2642         {
2643                 struct snd_xferi xferi;
2644                 struct snd_xferi __user *_xferi = arg;
2645                 struct snd_pcm_runtime *runtime = substream->runtime;
2646                 snd_pcm_sframes_t result;
2647                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2648                         return -EBADFD;
2649                 if (put_user(0, &_xferi->result))
2650                         return -EFAULT;
2651                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2652                         return -EFAULT;
2653                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2654                 __put_user(result, &_xferi->result);
2655                 return result < 0 ? result : 0;
2656         }
2657         case SNDRV_PCM_IOCTL_READN_FRAMES:
2658         {
2659                 struct snd_xfern xfern;
2660                 struct snd_xfern __user *_xfern = arg;
2661                 struct snd_pcm_runtime *runtime = substream->runtime;
2662                 void *bufs;
2663                 snd_pcm_sframes_t result;
2664                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2665                         return -EBADFD;
2666                 if (runtime->channels > 128)
2667                         return -EINVAL;
2668                 if (put_user(0, &_xfern->result))
2669                         return -EFAULT;
2670                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2671                         return -EFAULT;
2672
2673                 bufs = memdup_user(xfern.bufs,
2674                                    sizeof(void *) * runtime->channels);
2675                 if (IS_ERR(bufs))
2676                         return PTR_ERR(bufs);
2677                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2678                 kfree(bufs);
2679                 __put_user(result, &_xfern->result);
2680                 return result < 0 ? result : 0;
2681         }
2682         case SNDRV_PCM_IOCTL_REWIND:
2683         {
2684                 snd_pcm_uframes_t frames;
2685                 snd_pcm_uframes_t __user *_frames = arg;
2686                 snd_pcm_sframes_t result;
2687                 if (get_user(frames, _frames))
2688                         return -EFAULT;
2689                 if (put_user(0, _frames))
2690                         return -EFAULT;
2691                 result = snd_pcm_capture_rewind(substream, frames);
2692                 __put_user(result, _frames);
2693                 return result < 0 ? result : 0;
2694         }
2695         case SNDRV_PCM_IOCTL_FORWARD:
2696         {
2697                 snd_pcm_uframes_t frames;
2698                 snd_pcm_uframes_t __user *_frames = arg;
2699                 snd_pcm_sframes_t result;
2700                 if (get_user(frames, _frames))
2701                         return -EFAULT;
2702                 if (put_user(0, _frames))
2703                         return -EFAULT;
2704                 result = snd_pcm_capture_forward(substream, frames);
2705                 __put_user(result, _frames);
2706                 return result < 0 ? result : 0;
2707         }
2708         }
2709         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2710 }
2711
2712 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2713                                    unsigned long arg)
2714 {
2715         struct snd_pcm_file *pcm_file;
2716
2717         pcm_file = file->private_data;
2718
2719         if (((cmd >> 8) & 0xff) != 'A')
2720                 return -ENOTTY;
2721
2722         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2723                                        (void __user *)arg);
2724 }
2725
2726 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2727                                   unsigned long arg)
2728 {
2729         struct snd_pcm_file *pcm_file;
2730
2731         pcm_file = file->private_data;
2732
2733         if (((cmd >> 8) & 0xff) != 'A')
2734                 return -ENOTTY;
2735
2736         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2737                                       (void __user *)arg);
2738 }
2739
2740 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2741                          unsigned int cmd, void *arg)
2742 {
2743         mm_segment_t fs;
2744         int result;
2745         
2746         fs = snd_enter_user();
2747         switch (substream->stream) {
2748         case SNDRV_PCM_STREAM_PLAYBACK:
2749                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2750                                                  (void __user *)arg);
2751                 break;
2752         case SNDRV_PCM_STREAM_CAPTURE:
2753                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2754                                                 (void __user *)arg);
2755                 break;
2756         default:
2757                 result = -EINVAL;
2758                 break;
2759         }
2760         snd_leave_user(fs);
2761         return result;
2762 }
2763
2764 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2765
2766 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2767                             loff_t * offset)
2768 {
2769         struct snd_pcm_file *pcm_file;
2770         struct snd_pcm_substream *substream;
2771         struct snd_pcm_runtime *runtime;
2772         snd_pcm_sframes_t result;
2773
2774         pcm_file = file->private_data;
2775         substream = pcm_file->substream;
2776         if (PCM_RUNTIME_CHECK(substream))
2777                 return -ENXIO;
2778         runtime = substream->runtime;
2779         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2780                 return -EBADFD;
2781         if (!frame_aligned(runtime, count))
2782                 return -EINVAL;
2783         count = bytes_to_frames(runtime, count);
2784         result = snd_pcm_lib_read(substream, buf, count);
2785         if (result > 0)
2786                 result = frames_to_bytes(runtime, result);
2787         return result;
2788 }
2789
2790 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2791                              size_t count, loff_t * offset)
2792 {
2793         struct snd_pcm_file *pcm_file;
2794         struct snd_pcm_substream *substream;
2795         struct snd_pcm_runtime *runtime;
2796         snd_pcm_sframes_t result;
2797
2798         pcm_file = file->private_data;
2799         substream = pcm_file->substream;
2800         if (PCM_RUNTIME_CHECK(substream))
2801                 return -ENXIO;
2802         runtime = substream->runtime;
2803         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2804                 return -EBADFD;
2805         if (!frame_aligned(runtime, count))
2806                 return -EINVAL;
2807         count = bytes_to_frames(runtime, count);
2808         result = snd_pcm_lib_write(substream, buf, count);
2809         if (result > 0)
2810                 result = frames_to_bytes(runtime, result);
2811         return result;
2812 }
2813
2814 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2815                              unsigned long nr_segs, loff_t pos)
2816
2817 {
2818         struct snd_pcm_file *pcm_file;
2819         struct snd_pcm_substream *substream;
2820         struct snd_pcm_runtime *runtime;
2821         snd_pcm_sframes_t result;
2822         unsigned long i;
2823         void __user **bufs;
2824         snd_pcm_uframes_t frames;
2825
2826         pcm_file = iocb->ki_filp->private_data;
2827         substream = pcm_file->substream;
2828         if (PCM_RUNTIME_CHECK(substream))
2829                 return -ENXIO;
2830         runtime = substream->runtime;
2831         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2832                 return -EBADFD;
2833         if (nr_segs > 1024 || nr_segs != runtime->channels)
2834                 return -EINVAL;
2835         if (!frame_aligned(runtime, iov->iov_len))
2836                 return -EINVAL;
2837         frames = bytes_to_samples(runtime, iov->iov_len);
2838         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2839         if (bufs == NULL)
2840                 return -ENOMEM;
2841         for (i = 0; i < nr_segs; ++i)
2842                 bufs[i] = iov[i].iov_base;
2843         result = snd_pcm_lib_readv(substream, bufs, frames);
2844         if (result > 0)
2845                 result = frames_to_bytes(runtime, result);
2846         kfree(bufs);
2847         return result;
2848 }
2849
2850 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2851                               unsigned long nr_segs, loff_t pos)
2852 {
2853         struct snd_pcm_file *pcm_file;
2854         struct snd_pcm_substream *substream;
2855         struct snd_pcm_runtime *runtime;
2856         snd_pcm_sframes_t result;
2857         unsigned long i;
2858         void __user **bufs;
2859         snd_pcm_uframes_t frames;
2860
2861         pcm_file = iocb->ki_filp->private_data;
2862         substream = pcm_file->substream;
2863         if (PCM_RUNTIME_CHECK(substream))
2864                 return -ENXIO;
2865         runtime = substream->runtime;
2866         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2867                 return -EBADFD;
2868         if (nr_segs > 128 || nr_segs != runtime->channels ||
2869             !frame_aligned(runtime, iov->iov_len))
2870                 return -EINVAL;
2871         frames = bytes_to_samples(runtime, iov->iov_len);
2872         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2873         if (bufs == NULL)
2874                 return -ENOMEM;
2875         for (i = 0; i < nr_segs; ++i)
2876                 bufs[i] = iov[i].iov_base;
2877         result = snd_pcm_lib_writev(substream, bufs, frames);
2878         if (result > 0)
2879                 result = frames_to_bytes(runtime, result);
2880         kfree(bufs);
2881         return result;
2882 }
2883
2884 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2885 {
2886         struct snd_pcm_file *pcm_file;
2887         struct snd_pcm_substream *substream;
2888         struct snd_pcm_runtime *runtime;
2889         unsigned int mask;
2890         snd_pcm_uframes_t avail;
2891
2892         pcm_file = file->private_data;
2893
2894         substream = pcm_file->substream;
2895         if (PCM_RUNTIME_CHECK(substream))
2896                 return -ENXIO;
2897         runtime = substream->runtime;
2898
2899         poll_wait(file, &runtime->sleep, wait);
2900
2901         snd_pcm_stream_lock_irq(substream);
2902         avail = snd_pcm_playback_avail(runtime);
2903         switch (runtime->status->state) {
2904         case SNDRV_PCM_STATE_RUNNING:
2905         case SNDRV_PCM_STATE_PREPARED:
2906         case SNDRV_PCM_STATE_PAUSED:
2907                 if (avail >= runtime->control->avail_min) {
2908                         mask = POLLOUT | POLLWRNORM;
2909                         break;
2910                 }
2911                 /* Fall through */
2912         case SNDRV_PCM_STATE_DRAINING:
2913                 mask = 0;
2914                 break;
2915         default:
2916                 mask = POLLOUT | POLLWRNORM | POLLERR;
2917                 break;
2918         }
2919         snd_pcm_stream_unlock_irq(substream);
2920         return mask;
2921 }
2922
2923 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2924 {
2925         struct snd_pcm_file *pcm_file;
2926         struct snd_pcm_substream *substream;
2927         struct snd_pcm_runtime *runtime;
2928         unsigned int mask;
2929         snd_pcm_uframes_t avail;
2930
2931         pcm_file = file->private_data;
2932
2933         substream = pcm_file->substream;
2934         if (PCM_RUNTIME_CHECK(substream))
2935                 return -ENXIO;
2936         runtime = substream->runtime;
2937
2938         poll_wait(file, &runtime->sleep, wait);
2939
2940         snd_pcm_stream_lock_irq(substream);
2941         avail = snd_pcm_capture_avail(runtime);
2942         switch (runtime->status->state) {
2943         case SNDRV_PCM_STATE_RUNNING:
2944         case SNDRV_PCM_STATE_PREPARED:
2945         case SNDRV_PCM_STATE_PAUSED:
2946                 if (avail >= runtime->control->avail_min) {
2947                         mask = POLLIN | POLLRDNORM;
2948                         break;
2949                 }
2950                 mask = 0;
2951                 break;
2952         case SNDRV_PCM_STATE_DRAINING:
2953                 if (avail > 0) {
2954                         mask = POLLIN | POLLRDNORM;
2955                         break;
2956                 }
2957                 /* Fall through */
2958         default:
2959                 mask = POLLIN | POLLRDNORM | POLLERR;
2960                 break;
2961         }
2962         snd_pcm_stream_unlock_irq(substream);
2963         return mask;
2964 }
2965
2966 /*
2967  * mmap support
2968  */
2969
2970 /*
2971  * Only on coherent architectures, we can mmap the status and the control records
2972  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
2973  */
2974 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2975 /*
2976  * mmap status record
2977  */
2978 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2979                                                 struct vm_fault *vmf)
2980 {
2981         struct snd_pcm_substream *substream = area->vm_private_data;
2982         struct snd_pcm_runtime *runtime;
2983         
2984         if (substream == NULL)
2985                 return VM_FAULT_SIGBUS;
2986         runtime = substream->runtime;
2987         vmf->page = virt_to_page(runtime->status);
2988         get_page(vmf->page);
2989         return 0;
2990 }
2991
2992 static struct vm_operations_struct snd_pcm_vm_ops_status =
2993 {
2994         .fault =        snd_pcm_mmap_status_fault,
2995 };
2996
2997 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
2998                                struct vm_area_struct *area)
2999 {
3000         struct snd_pcm_runtime *runtime;
3001         long size;
3002         if (!(area->vm_flags & VM_READ))
3003                 return -EINVAL;
3004         runtime = substream->runtime;
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 int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3018                                                 struct vm_fault *vmf)
3019 {
3020         struct snd_pcm_substream *substream = area->vm_private_data;
3021         struct snd_pcm_runtime *runtime;
3022         
3023         if (substream == NULL)
3024                 return VM_FAULT_SIGBUS;
3025         runtime = substream->runtime;
3026         vmf->page = virt_to_page(runtime->control);
3027         get_page(vmf->page);
3028         return 0;
3029 }
3030
3031 static struct vm_operations_struct snd_pcm_vm_ops_control =
3032 {
3033         .fault =        snd_pcm_mmap_control_fault,
3034 };
3035
3036 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3037                                 struct vm_area_struct *area)
3038 {
3039         struct snd_pcm_runtime *runtime;
3040         long size;
3041         if (!(area->vm_flags & VM_READ))
3042                 return -EINVAL;
3043         runtime = substream->runtime;
3044         size = area->vm_end - area->vm_start;
3045         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3046                 return -EINVAL;
3047         area->vm_ops = &snd_pcm_vm_ops_control;
3048         area->vm_private_data = substream;
3049         area->vm_flags |= VM_RESERVED;
3050         return 0;
3051 }
3052 #else /* ! coherent mmap */
3053 /*
3054  * don't support mmap for status and control records.
3055  */
3056 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3057                                struct vm_area_struct *area)
3058 {
3059         return -ENXIO;
3060 }
3061 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3062                                 struct vm_area_struct *area)
3063 {
3064         return -ENXIO;
3065 }
3066 #endif /* coherent mmap */
3067
3068 /*
3069  * fault callback for mmapping a RAM page
3070  */
3071 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3072                                                 struct vm_fault *vmf)
3073 {
3074         struct snd_pcm_substream *substream = area->vm_private_data;
3075         struct snd_pcm_runtime *runtime;
3076         unsigned long offset;
3077         struct page * page;
3078         void *vaddr;
3079         size_t dma_bytes;
3080         
3081         if (substream == NULL)
3082                 return VM_FAULT_SIGBUS;
3083         runtime = substream->runtime;
3084         offset = vmf->pgoff << PAGE_SHIFT;
3085         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3086         if (offset > dma_bytes - PAGE_SIZE)
3087                 return VM_FAULT_SIGBUS;
3088         if (substream->ops->page) {
3089                 page = substream->ops->page(substream, offset);
3090                 if (!page)
3091                         return VM_FAULT_SIGBUS;
3092         } else {
3093                 vaddr = runtime->dma_area + offset;
3094                 page = virt_to_page(vaddr);
3095         }
3096         get_page(page);
3097         vmf->page = page;
3098         return 0;
3099 }
3100
3101 static struct vm_operations_struct snd_pcm_vm_ops_data =
3102 {
3103         .open =         snd_pcm_mmap_data_open,
3104         .close =        snd_pcm_mmap_data_close,
3105         .fault =        snd_pcm_mmap_data_fault,
3106 };
3107
3108 /*
3109  * mmap the DMA buffer on RAM
3110  */
3111 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3112                                 struct vm_area_struct *area)
3113 {
3114         area->vm_ops = &snd_pcm_vm_ops_data;
3115         area->vm_private_data = substream;
3116         area->vm_flags |= VM_RESERVED;
3117         atomic_inc(&substream->mmap_count);
3118         return 0;
3119 }
3120
3121 /*
3122  * mmap the DMA buffer on I/O memory area
3123  */
3124 #if SNDRV_PCM_INFO_MMAP_IOMEM
3125 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3126 {
3127         .open =         snd_pcm_mmap_data_open,
3128         .close =        snd_pcm_mmap_data_close,
3129 };
3130
3131 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3132                            struct vm_area_struct *area)
3133 {
3134         long size;
3135         unsigned long offset;
3136
3137 #ifdef pgprot_noncached
3138         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3139 #endif
3140         area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3141         area->vm_private_data = substream;
3142         area->vm_flags |= VM_IO;
3143         size = area->vm_end - area->vm_start;
3144         offset = area->vm_pgoff << PAGE_SHIFT;
3145         if (io_remap_pfn_range(area, area->vm_start,
3146                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3147                                 size, area->vm_page_prot))
3148                 return -EAGAIN;
3149         atomic_inc(&substream->mmap_count);
3150         return 0;
3151 }
3152
3153 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3154 #endif /* SNDRV_PCM_INFO_MMAP */
3155
3156 /*
3157  * mmap DMA buffer
3158  */
3159 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3160                       struct vm_area_struct *area)
3161 {
3162         struct snd_pcm_runtime *runtime;
3163         long size;
3164         unsigned long offset;
3165         size_t dma_bytes;
3166
3167         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3168                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3169                         return -EINVAL;
3170         } else {
3171                 if (!(area->vm_flags & VM_READ))
3172                         return -EINVAL;
3173         }
3174         runtime = substream->runtime;
3175         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3176                 return -EBADFD;
3177         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3178                 return -ENXIO;
3179         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3180             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3181                 return -EINVAL;
3182         size = area->vm_end - area->vm_start;
3183         offset = area->vm_pgoff << PAGE_SHIFT;
3184         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3185         if ((size_t)size > dma_bytes)
3186                 return -EINVAL;
3187         if (offset > dma_bytes - size)
3188                 return -EINVAL;
3189
3190         if (substream->ops->mmap)
3191                 return substream->ops->mmap(substream, area);
3192         else
3193                 return snd_pcm_default_mmap(substream, area);
3194 }
3195
3196 EXPORT_SYMBOL(snd_pcm_mmap_data);
3197
3198 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3199 {
3200         struct snd_pcm_file * pcm_file;
3201         struct snd_pcm_substream *substream;    
3202         unsigned long offset;
3203         
3204         pcm_file = file->private_data;
3205         substream = pcm_file->substream;
3206         if (PCM_RUNTIME_CHECK(substream))
3207                 return -ENXIO;
3208
3209         offset = area->vm_pgoff << PAGE_SHIFT;
3210         switch (offset) {
3211         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3212                 if (pcm_file->no_compat_mmap)
3213                         return -ENXIO;
3214                 return snd_pcm_mmap_status(substream, file, area);
3215         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3216                 if (pcm_file->no_compat_mmap)
3217                         return -ENXIO;
3218                 return snd_pcm_mmap_control(substream, file, area);
3219         default:
3220                 return snd_pcm_mmap_data(substream, file, area);
3221         }
3222         return 0;
3223 }
3224
3225 static int snd_pcm_fasync(int fd, struct file * file, int on)
3226 {
3227         struct snd_pcm_file * pcm_file;
3228         struct snd_pcm_substream *substream;
3229         struct snd_pcm_runtime *runtime;
3230         int err = -ENXIO;
3231
3232         lock_kernel();
3233         pcm_file = file->private_data;
3234         substream = pcm_file->substream;
3235         if (PCM_RUNTIME_CHECK(substream))
3236                 goto out;
3237         runtime = substream->runtime;
3238         err = fasync_helper(fd, file, on, &runtime->fasync);
3239 out:
3240         unlock_kernel();
3241         return err;
3242 }
3243
3244 /*
3245  * ioctl32 compat
3246  */
3247 #ifdef CONFIG_COMPAT
3248 #include "pcm_compat.c"
3249 #else
3250 #define snd_pcm_ioctl_compat    NULL
3251 #endif
3252
3253 /*
3254  *  To be removed helpers to keep binary compatibility
3255  */
3256
3257 #ifdef CONFIG_SND_SUPPORT_OLD_API
3258 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3259 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3260
3261 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3262                                                struct snd_pcm_hw_params_old *oparams)
3263 {
3264         unsigned int i;
3265
3266         memset(params, 0, sizeof(*params));
3267         params->flags = oparams->flags;
3268         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3269                 params->masks[i].bits[0] = oparams->masks[i];
3270         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3271         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3272         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3273         params->info = oparams->info;
3274         params->msbits = oparams->msbits;
3275         params->rate_num = oparams->rate_num;
3276         params->rate_den = oparams->rate_den;
3277         params->fifo_size = oparams->fifo_size;
3278 }
3279
3280 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3281                                              struct snd_pcm_hw_params *params)
3282 {
3283         unsigned int i;
3284
3285         memset(oparams, 0, sizeof(*oparams));
3286         oparams->flags = params->flags;
3287         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3288                 oparams->masks[i] = params->masks[i].bits[0];
3289         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3290         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3291         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3292         oparams->info = params->info;
3293         oparams->msbits = params->msbits;
3294         oparams->rate_num = params->rate_num;
3295         oparams->rate_den = params->rate_den;
3296         oparams->fifo_size = params->fifo_size;
3297 }
3298
3299 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3300                                       struct snd_pcm_hw_params_old __user * _oparams)
3301 {
3302         struct snd_pcm_hw_params *params;
3303         struct snd_pcm_hw_params_old *oparams = NULL;
3304         int err;
3305
3306         params = kmalloc(sizeof(*params), GFP_KERNEL);
3307         if (!params)
3308                 return -ENOMEM;
3309
3310         oparams = memdup_user(_oparams, sizeof(*oparams));
3311         if (IS_ERR(oparams)) {
3312                 err = PTR_ERR(oparams);
3313                 goto out;
3314         }
3315         snd_pcm_hw_convert_from_old_params(params, oparams);
3316         err = snd_pcm_hw_refine(substream, params);
3317         snd_pcm_hw_convert_to_old_params(oparams, params);
3318         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3319                 if (!err)
3320                         err = -EFAULT;
3321         }
3322
3323         kfree(oparams);
3324 out:
3325         kfree(params);
3326         return err;
3327 }
3328
3329 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3330                                       struct snd_pcm_hw_params_old __user * _oparams)
3331 {
3332         struct snd_pcm_hw_params *params;
3333         struct snd_pcm_hw_params_old *oparams = NULL;
3334         int err;
3335
3336         params = kmalloc(sizeof(*params), GFP_KERNEL);
3337         if (!params)
3338                 return -ENOMEM;
3339
3340         oparams = memdup_user(_oparams, sizeof(*oparams));
3341         if (IS_ERR(oparams)) {
3342                 err = PTR_ERR(oparams);
3343                 goto out;
3344         }
3345         snd_pcm_hw_convert_from_old_params(params, oparams);
3346         err = snd_pcm_hw_params(substream, params);
3347         snd_pcm_hw_convert_to_old_params(oparams, params);
3348         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3349                 if (!err)
3350                         err = -EFAULT;
3351         }
3352
3353         kfree(oparams);
3354 out:
3355         kfree(params);
3356         return err;
3357 }
3358 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3359
3360 #ifndef CONFIG_MMU
3361 unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
3362                                       unsigned long len, unsigned long pgoff,
3363                                       unsigned long flags)
3364 {
3365         return 0;
3366 }
3367 #else
3368 # define dummy_get_unmapped_area NULL
3369 #endif
3370
3371 /*
3372  *  Register section
3373  */
3374
3375 const struct file_operations snd_pcm_f_ops[2] = {
3376         {
3377                 .owner =                THIS_MODULE,
3378                 .write =                snd_pcm_write,
3379                 .aio_write =            snd_pcm_aio_write,
3380                 .open =                 snd_pcm_playback_open,
3381                 .release =              snd_pcm_release,
3382                 .poll =                 snd_pcm_playback_poll,
3383                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3384                 .compat_ioctl =         snd_pcm_ioctl_compat,
3385                 .mmap =                 snd_pcm_mmap,
3386                 .fasync =               snd_pcm_fasync,
3387                 .get_unmapped_area =    dummy_get_unmapped_area,
3388         },
3389         {
3390                 .owner =                THIS_MODULE,
3391                 .read =                 snd_pcm_read,
3392                 .aio_read =             snd_pcm_aio_read,
3393                 .open =                 snd_pcm_capture_open,
3394                 .release =              snd_pcm_release,
3395                 .poll =                 snd_pcm_capture_poll,
3396                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3397                 .compat_ioctl =         snd_pcm_ioctl_compat,
3398                 .mmap =                 snd_pcm_mmap,
3399                 .fasync =               snd_pcm_fasync,
3400                 .get_unmapped_area =    dummy_get_unmapped_area,
3401         }
3402 };