const: mark struct vm_struct_operations
[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 & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
316         if (!params->fifo_size) {
317                 if (snd_mask_min(&params->masks[SNDRV_PCM_HW_PARAM_FORMAT]) ==
318                     snd_mask_max(&params->masks[SNDRV_PCM_HW_PARAM_FORMAT]) &&
319                     snd_mask_min(&params->masks[SNDRV_PCM_HW_PARAM_CHANNELS]) ==
320                     snd_mask_max(&params->masks[SNDRV_PCM_HW_PARAM_CHANNELS])) {
321                         changed = substream->ops->ioctl(substream,
322                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
323                         if (changed < 0)
324                                 return changed;
325                 }
326         }
327         params->rmask = 0;
328         return 0;
329 }
330
331 EXPORT_SYMBOL(snd_pcm_hw_refine);
332
333 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
334                                   struct snd_pcm_hw_params __user * _params)
335 {
336         struct snd_pcm_hw_params *params;
337         int err;
338
339         params = memdup_user(_params, sizeof(*params));
340         if (IS_ERR(params))
341                 return PTR_ERR(params);
342
343         err = snd_pcm_hw_refine(substream, params);
344         if (copy_to_user(_params, params, sizeof(*params))) {
345                 if (!err)
346                         err = -EFAULT;
347         }
348
349         kfree(params);
350         return err;
351 }
352
353 static int period_to_usecs(struct snd_pcm_runtime *runtime)
354 {
355         int usecs;
356
357         if (! runtime->rate)
358                 return -1; /* invalid */
359
360         /* take 75% of period time as the deadline */
361         usecs = (750000 / runtime->rate) * runtime->period_size;
362         usecs += ((750000 % runtime->rate) * runtime->period_size) /
363                 runtime->rate;
364
365         return usecs;
366 }
367
368 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
369                              struct snd_pcm_hw_params *params)
370 {
371         struct snd_pcm_runtime *runtime;
372         int err, usecs;
373         unsigned int bits;
374         snd_pcm_uframes_t frames;
375
376         if (PCM_RUNTIME_CHECK(substream))
377                 return -ENXIO;
378         runtime = substream->runtime;
379         snd_pcm_stream_lock_irq(substream);
380         switch (runtime->status->state) {
381         case SNDRV_PCM_STATE_OPEN:
382         case SNDRV_PCM_STATE_SETUP:
383         case SNDRV_PCM_STATE_PREPARED:
384                 break;
385         default:
386                 snd_pcm_stream_unlock_irq(substream);
387                 return -EBADFD;
388         }
389         snd_pcm_stream_unlock_irq(substream);
390 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
391         if (!substream->oss.oss)
392 #endif
393                 if (atomic_read(&substream->mmap_count))
394                         return -EBADFD;
395
396         params->rmask = ~0U;
397         err = snd_pcm_hw_refine(substream, params);
398         if (err < 0)
399                 goto _error;
400
401         err = snd_pcm_hw_params_choose(substream, params);
402         if (err < 0)
403                 goto _error;
404
405         if (substream->ops->hw_params != NULL) {
406                 err = substream->ops->hw_params(substream, params);
407                 if (err < 0)
408                         goto _error;
409         }
410
411         runtime->access = params_access(params);
412         runtime->format = params_format(params);
413         runtime->subformat = params_subformat(params);
414         runtime->channels = params_channels(params);
415         runtime->rate = params_rate(params);
416         runtime->period_size = params_period_size(params);
417         runtime->periods = params_periods(params);
418         runtime->buffer_size = params_buffer_size(params);
419         runtime->info = params->info;
420         runtime->rate_num = params->rate_num;
421         runtime->rate_den = params->rate_den;
422
423         bits = snd_pcm_format_physical_width(runtime->format);
424         runtime->sample_bits = bits;
425         bits *= runtime->channels;
426         runtime->frame_bits = bits;
427         frames = 1;
428         while (bits % 8 != 0) {
429                 bits *= 2;
430                 frames *= 2;
431         }
432         runtime->byte_align = bits / 8;
433         runtime->min_align = frames;
434
435         /* Default sw params */
436         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
437         runtime->period_step = 1;
438         runtime->control->avail_min = runtime->period_size;
439         runtime->start_threshold = 1;
440         runtime->stop_threshold = runtime->buffer_size;
441         runtime->silence_threshold = 0;
442         runtime->silence_size = 0;
443         runtime->boundary = runtime->buffer_size;
444         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
445                 runtime->boundary *= 2;
446
447         snd_pcm_timer_resolution_change(substream);
448         runtime->status->state = SNDRV_PCM_STATE_SETUP;
449
450         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
451                                 substream->latency_id);
452         if ((usecs = period_to_usecs(runtime)) >= 0)
453                 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
454                                         substream->latency_id, usecs);
455         return 0;
456  _error:
457         /* hardware might be unuseable from this time,
458            so we force application to retry to set
459            the correct hardware parameter settings */
460         runtime->status->state = SNDRV_PCM_STATE_OPEN;
461         if (substream->ops->hw_free != NULL)
462                 substream->ops->hw_free(substream);
463         return err;
464 }
465
466 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
467                                   struct snd_pcm_hw_params __user * _params)
468 {
469         struct snd_pcm_hw_params *params;
470         int err;
471
472         params = memdup_user(_params, sizeof(*params));
473         if (IS_ERR(params))
474                 return PTR_ERR(params);
475
476         err = snd_pcm_hw_params(substream, params);
477         if (copy_to_user(_params, params, sizeof(*params))) {
478                 if (!err)
479                         err = -EFAULT;
480         }
481
482         kfree(params);
483         return err;
484 }
485
486 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
487 {
488         struct snd_pcm_runtime *runtime;
489         int result = 0;
490
491         if (PCM_RUNTIME_CHECK(substream))
492                 return -ENXIO;
493         runtime = substream->runtime;
494         snd_pcm_stream_lock_irq(substream);
495         switch (runtime->status->state) {
496         case SNDRV_PCM_STATE_SETUP:
497         case SNDRV_PCM_STATE_PREPARED:
498                 break;
499         default:
500                 snd_pcm_stream_unlock_irq(substream);
501                 return -EBADFD;
502         }
503         snd_pcm_stream_unlock_irq(substream);
504         if (atomic_read(&substream->mmap_count))
505                 return -EBADFD;
506         if (substream->ops->hw_free)
507                 result = substream->ops->hw_free(substream);
508         runtime->status->state = SNDRV_PCM_STATE_OPEN;
509         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
510                 substream->latency_id);
511         return result;
512 }
513
514 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
515                              struct snd_pcm_sw_params *params)
516 {
517         struct snd_pcm_runtime *runtime;
518
519         if (PCM_RUNTIME_CHECK(substream))
520                 return -ENXIO;
521         runtime = substream->runtime;
522         snd_pcm_stream_lock_irq(substream);
523         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
524                 snd_pcm_stream_unlock_irq(substream);
525                 return -EBADFD;
526         }
527         snd_pcm_stream_unlock_irq(substream);
528
529         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
530                 return -EINVAL;
531         if (params->avail_min == 0)
532                 return -EINVAL;
533         if (params->silence_size >= runtime->boundary) {
534                 if (params->silence_threshold != 0)
535                         return -EINVAL;
536         } else {
537                 if (params->silence_size > params->silence_threshold)
538                         return -EINVAL;
539                 if (params->silence_threshold > runtime->buffer_size)
540                         return -EINVAL;
541         }
542         snd_pcm_stream_lock_irq(substream);
543         runtime->tstamp_mode = params->tstamp_mode;
544         runtime->period_step = params->period_step;
545         runtime->control->avail_min = params->avail_min;
546         runtime->start_threshold = params->start_threshold;
547         runtime->stop_threshold = params->stop_threshold;
548         runtime->silence_threshold = params->silence_threshold;
549         runtime->silence_size = params->silence_size;
550         params->boundary = runtime->boundary;
551         if (snd_pcm_running(substream)) {
552                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
553                     runtime->silence_size > 0)
554                         snd_pcm_playback_silence(substream, ULONG_MAX);
555                 wake_up(&runtime->sleep);
556         }
557         snd_pcm_stream_unlock_irq(substream);
558         return 0;
559 }
560
561 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
562                                   struct snd_pcm_sw_params __user * _params)
563 {
564         struct snd_pcm_sw_params params;
565         int err;
566         if (copy_from_user(&params, _params, sizeof(params)))
567                 return -EFAULT;
568         err = snd_pcm_sw_params(substream, &params);
569         if (copy_to_user(_params, &params, sizeof(params)))
570                 return -EFAULT;
571         return err;
572 }
573
574 int snd_pcm_status(struct snd_pcm_substream *substream,
575                    struct snd_pcm_status *status)
576 {
577         struct snd_pcm_runtime *runtime = substream->runtime;
578
579         snd_pcm_stream_lock_irq(substream);
580         status->state = runtime->status->state;
581         status->suspended_state = runtime->status->suspended_state;
582         if (status->state == SNDRV_PCM_STATE_OPEN)
583                 goto _end;
584         status->trigger_tstamp = runtime->trigger_tstamp;
585         if (snd_pcm_running(substream)) {
586                 snd_pcm_update_hw_ptr(substream);
587                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
588                         status->tstamp = runtime->status->tstamp;
589                         goto _tstamp_end;
590                 }
591         }
592         snd_pcm_gettime(runtime, &status->tstamp);
593  _tstamp_end:
594         status->appl_ptr = runtime->control->appl_ptr;
595         status->hw_ptr = runtime->status->hw_ptr;
596         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
597                 status->avail = snd_pcm_playback_avail(runtime);
598                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
599                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
600                         status->delay = runtime->buffer_size - status->avail;
601                         status->delay += runtime->delay;
602                 } else
603                         status->delay = 0;
604         } else {
605                 status->avail = snd_pcm_capture_avail(runtime);
606                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
607                         status->delay = status->avail + runtime->delay;
608                 else
609                         status->delay = 0;
610         }
611         status->avail_max = runtime->avail_max;
612         status->overrange = runtime->overrange;
613         runtime->avail_max = 0;
614         runtime->overrange = 0;
615  _end:
616         snd_pcm_stream_unlock_irq(substream);
617         return 0;
618 }
619
620 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
621                                struct snd_pcm_status __user * _status)
622 {
623         struct snd_pcm_status status;
624         int res;
625         
626         memset(&status, 0, sizeof(status));
627         res = snd_pcm_status(substream, &status);
628         if (res < 0)
629                 return res;
630         if (copy_to_user(_status, &status, sizeof(status)))
631                 return -EFAULT;
632         return 0;
633 }
634
635 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
636                                 struct snd_pcm_channel_info * info)
637 {
638         struct snd_pcm_runtime *runtime;
639         unsigned int channel;
640         
641         channel = info->channel;
642         runtime = substream->runtime;
643         snd_pcm_stream_lock_irq(substream);
644         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
645                 snd_pcm_stream_unlock_irq(substream);
646                 return -EBADFD;
647         }
648         snd_pcm_stream_unlock_irq(substream);
649         if (channel >= runtime->channels)
650                 return -EINVAL;
651         memset(info, 0, sizeof(*info));
652         info->channel = channel;
653         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
654 }
655
656 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
657                                      struct snd_pcm_channel_info __user * _info)
658 {
659         struct snd_pcm_channel_info info;
660         int res;
661         
662         if (copy_from_user(&info, _info, sizeof(info)))
663                 return -EFAULT;
664         res = snd_pcm_channel_info(substream, &info);
665         if (res < 0)
666                 return res;
667         if (copy_to_user(_info, &info, sizeof(info)))
668                 return -EFAULT;
669         return 0;
670 }
671
672 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
673 {
674         struct snd_pcm_runtime *runtime = substream->runtime;
675         if (runtime->trigger_master == NULL)
676                 return;
677         if (runtime->trigger_master == substream) {
678                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
679         } else {
680                 snd_pcm_trigger_tstamp(runtime->trigger_master);
681                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
682         }
683         runtime->trigger_master = NULL;
684 }
685
686 struct action_ops {
687         int (*pre_action)(struct snd_pcm_substream *substream, int state);
688         int (*do_action)(struct snd_pcm_substream *substream, int state);
689         void (*undo_action)(struct snd_pcm_substream *substream, int state);
690         void (*post_action)(struct snd_pcm_substream *substream, int state);
691 };
692
693 /*
694  *  this functions is core for handling of linked stream
695  *  Note: the stream state might be changed also on failure
696  *  Note2: call with calling stream lock + link lock
697  */
698 static int snd_pcm_action_group(struct action_ops *ops,
699                                 struct snd_pcm_substream *substream,
700                                 int state, int do_lock)
701 {
702         struct snd_pcm_substream *s = NULL;
703         struct snd_pcm_substream *s1;
704         int res = 0;
705
706         snd_pcm_group_for_each_entry(s, substream) {
707                 if (do_lock && s != substream)
708                         spin_lock_nested(&s->self_group.lock,
709                                          SINGLE_DEPTH_NESTING);
710                 res = ops->pre_action(s, state);
711                 if (res < 0)
712                         goto _unlock;
713         }
714         snd_pcm_group_for_each_entry(s, substream) {
715                 res = ops->do_action(s, state);
716                 if (res < 0) {
717                         if (ops->undo_action) {
718                                 snd_pcm_group_for_each_entry(s1, substream) {
719                                         if (s1 == s) /* failed stream */
720                                                 break;
721                                         ops->undo_action(s1, state);
722                                 }
723                         }
724                         s = NULL; /* unlock all */
725                         goto _unlock;
726                 }
727         }
728         snd_pcm_group_for_each_entry(s, substream) {
729                 ops->post_action(s, state);
730         }
731  _unlock:
732         if (do_lock) {
733                 /* unlock streams */
734                 snd_pcm_group_for_each_entry(s1, substream) {
735                         if (s1 != substream)
736                                 spin_unlock(&s1->self_group.lock);
737                         if (s1 == s)    /* end */
738                                 break;
739                 }
740         }
741         return res;
742 }
743
744 /*
745  *  Note: call with stream lock
746  */
747 static int snd_pcm_action_single(struct action_ops *ops,
748                                  struct snd_pcm_substream *substream,
749                                  int state)
750 {
751         int res;
752         
753         res = ops->pre_action(substream, state);
754         if (res < 0)
755                 return res;
756         res = ops->do_action(substream, state);
757         if (res == 0)
758                 ops->post_action(substream, state);
759         else if (ops->undo_action)
760                 ops->undo_action(substream, state);
761         return res;
762 }
763
764 /*
765  *  Note: call with stream lock
766  */
767 static int snd_pcm_action(struct action_ops *ops,
768                           struct snd_pcm_substream *substream,
769                           int state)
770 {
771         int res;
772
773         if (snd_pcm_stream_linked(substream)) {
774                 if (!spin_trylock(&substream->group->lock)) {
775                         spin_unlock(&substream->self_group.lock);
776                         spin_lock(&substream->group->lock);
777                         spin_lock(&substream->self_group.lock);
778                 }
779                 res = snd_pcm_action_group(ops, substream, state, 1);
780                 spin_unlock(&substream->group->lock);
781         } else {
782                 res = snd_pcm_action_single(ops, substream, state);
783         }
784         return res;
785 }
786
787 /*
788  *  Note: don't use any locks before
789  */
790 static int snd_pcm_action_lock_irq(struct action_ops *ops,
791                                    struct snd_pcm_substream *substream,
792                                    int state)
793 {
794         int res;
795
796         read_lock_irq(&snd_pcm_link_rwlock);
797         if (snd_pcm_stream_linked(substream)) {
798                 spin_lock(&substream->group->lock);
799                 spin_lock(&substream->self_group.lock);
800                 res = snd_pcm_action_group(ops, substream, state, 1);
801                 spin_unlock(&substream->self_group.lock);
802                 spin_unlock(&substream->group->lock);
803         } else {
804                 spin_lock(&substream->self_group.lock);
805                 res = snd_pcm_action_single(ops, substream, state);
806                 spin_unlock(&substream->self_group.lock);
807         }
808         read_unlock_irq(&snd_pcm_link_rwlock);
809         return res;
810 }
811
812 /*
813  */
814 static int snd_pcm_action_nonatomic(struct action_ops *ops,
815                                     struct snd_pcm_substream *substream,
816                                     int state)
817 {
818         int res;
819
820         down_read(&snd_pcm_link_rwsem);
821         if (snd_pcm_stream_linked(substream))
822                 res = snd_pcm_action_group(ops, substream, state, 0);
823         else
824                 res = snd_pcm_action_single(ops, substream, state);
825         up_read(&snd_pcm_link_rwsem);
826         return res;
827 }
828
829 /*
830  * start callbacks
831  */
832 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
833 {
834         struct snd_pcm_runtime *runtime = substream->runtime;
835         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
836                 return -EBADFD;
837         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
838             !snd_pcm_playback_data(substream))
839                 return -EPIPE;
840         runtime->trigger_master = substream;
841         return 0;
842 }
843
844 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
845 {
846         if (substream->runtime->trigger_master != substream)
847                 return 0;
848         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
849 }
850
851 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
852 {
853         if (substream->runtime->trigger_master == substream)
854                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
855 }
856
857 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
858 {
859         struct snd_pcm_runtime *runtime = substream->runtime;
860         snd_pcm_trigger_tstamp(substream);
861         runtime->hw_ptr_jiffies = jiffies;
862         runtime->status->state = state;
863         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
864             runtime->silence_size > 0)
865                 snd_pcm_playback_silence(substream, ULONG_MAX);
866         if (substream->timer)
867                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
868                                  &runtime->trigger_tstamp);
869 }
870
871 static struct action_ops snd_pcm_action_start = {
872         .pre_action = snd_pcm_pre_start,
873         .do_action = snd_pcm_do_start,
874         .undo_action = snd_pcm_undo_start,
875         .post_action = snd_pcm_post_start
876 };
877
878 /**
879  * snd_pcm_start - start all linked streams
880  * @substream: the PCM substream instance
881  */
882 int snd_pcm_start(struct snd_pcm_substream *substream)
883 {
884         return snd_pcm_action(&snd_pcm_action_start, substream,
885                               SNDRV_PCM_STATE_RUNNING);
886 }
887
888 /*
889  * stop callbacks
890  */
891 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
892 {
893         struct snd_pcm_runtime *runtime = substream->runtime;
894         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
895                 return -EBADFD;
896         runtime->trigger_master = substream;
897         return 0;
898 }
899
900 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
901 {
902         if (substream->runtime->trigger_master == substream &&
903             snd_pcm_running(substream))
904                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
905         return 0; /* unconditonally stop all substreams */
906 }
907
908 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
909 {
910         struct snd_pcm_runtime *runtime = substream->runtime;
911         if (runtime->status->state != state) {
912                 snd_pcm_trigger_tstamp(substream);
913                 if (substream->timer)
914                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
915                                          &runtime->trigger_tstamp);
916                 runtime->status->state = state;
917         }
918         wake_up(&runtime->sleep);
919 }
920
921 static struct action_ops snd_pcm_action_stop = {
922         .pre_action = snd_pcm_pre_stop,
923         .do_action = snd_pcm_do_stop,
924         .post_action = snd_pcm_post_stop
925 };
926
927 /**
928  * snd_pcm_stop - try to stop all running streams in the substream group
929  * @substream: the PCM substream instance
930  * @state: PCM state after stopping the stream
931  *
932  * The state of each stream is then changed to the given state unconditionally.
933  */
934 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
935 {
936         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
937 }
938
939 EXPORT_SYMBOL(snd_pcm_stop);
940
941 /**
942  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
943  * @substream: the PCM substream
944  *
945  * After stopping, the state is changed to SETUP.
946  * Unlike snd_pcm_stop(), this affects only the given stream.
947  */
948 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
949 {
950         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
951                                      SNDRV_PCM_STATE_SETUP);
952 }
953
954 /*
955  * pause callbacks
956  */
957 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
958 {
959         struct snd_pcm_runtime *runtime = substream->runtime;
960         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
961                 return -ENOSYS;
962         if (push) {
963                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
964                         return -EBADFD;
965         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
966                 return -EBADFD;
967         runtime->trigger_master = substream;
968         return 0;
969 }
970
971 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
972 {
973         if (substream->runtime->trigger_master != substream)
974                 return 0;
975         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
976          * a delta betwen the current jiffies, this gives a large enough
977          * delta, effectively to skip the check once.
978          */
979         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
980         return substream->ops->trigger(substream,
981                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
982                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
983 }
984
985 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
986 {
987         if (substream->runtime->trigger_master == substream)
988                 substream->ops->trigger(substream,
989                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
990                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
991 }
992
993 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
994 {
995         struct snd_pcm_runtime *runtime = substream->runtime;
996         snd_pcm_trigger_tstamp(substream);
997         if (push) {
998                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
999                 if (substream->timer)
1000                         snd_timer_notify(substream->timer,
1001                                          SNDRV_TIMER_EVENT_MPAUSE,
1002                                          &runtime->trigger_tstamp);
1003                 wake_up(&runtime->sleep);
1004         } else {
1005                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1006                 if (substream->timer)
1007                         snd_timer_notify(substream->timer,
1008                                          SNDRV_TIMER_EVENT_MCONTINUE,
1009                                          &runtime->trigger_tstamp);
1010         }
1011 }
1012
1013 static struct action_ops snd_pcm_action_pause = {
1014         .pre_action = snd_pcm_pre_pause,
1015         .do_action = snd_pcm_do_pause,
1016         .undo_action = snd_pcm_undo_pause,
1017         .post_action = snd_pcm_post_pause
1018 };
1019
1020 /*
1021  * Push/release the pause for all linked streams.
1022  */
1023 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1024 {
1025         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1026 }
1027
1028 #ifdef CONFIG_PM
1029 /* suspend */
1030
1031 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1032 {
1033         struct snd_pcm_runtime *runtime = substream->runtime;
1034         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1035                 return -EBUSY;
1036         runtime->trigger_master = substream;
1037         return 0;
1038 }
1039
1040 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1041 {
1042         struct snd_pcm_runtime *runtime = substream->runtime;
1043         if (runtime->trigger_master != substream)
1044                 return 0;
1045         if (! snd_pcm_running(substream))
1046                 return 0;
1047         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1048         return 0; /* suspend unconditionally */
1049 }
1050
1051 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1052 {
1053         struct snd_pcm_runtime *runtime = substream->runtime;
1054         snd_pcm_trigger_tstamp(substream);
1055         if (substream->timer)
1056                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1057                                  &runtime->trigger_tstamp);
1058         runtime->status->suspended_state = runtime->status->state;
1059         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1060         wake_up(&runtime->sleep);
1061 }
1062
1063 static struct action_ops snd_pcm_action_suspend = {
1064         .pre_action = snd_pcm_pre_suspend,
1065         .do_action = snd_pcm_do_suspend,
1066         .post_action = snd_pcm_post_suspend
1067 };
1068
1069 /**
1070  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1071  * @substream: the PCM substream
1072  *
1073  * After this call, all streams are changed to SUSPENDED state.
1074  */
1075 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1076 {
1077         int err;
1078         unsigned long flags;
1079
1080         if (! substream)
1081                 return 0;
1082
1083         snd_pcm_stream_lock_irqsave(substream, flags);
1084         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1085         snd_pcm_stream_unlock_irqrestore(substream, flags);
1086         return err;
1087 }
1088
1089 EXPORT_SYMBOL(snd_pcm_suspend);
1090
1091 /**
1092  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1093  * @pcm: the PCM instance
1094  *
1095  * After this call, all streams are changed to SUSPENDED state.
1096  */
1097 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1098 {
1099         struct snd_pcm_substream *substream;
1100         int stream, err = 0;
1101
1102         if (! pcm)
1103                 return 0;
1104
1105         for (stream = 0; stream < 2; stream++) {
1106                 for (substream = pcm->streams[stream].substream;
1107                      substream; substream = substream->next) {
1108                         /* FIXME: the open/close code should lock this as well */
1109                         if (substream->runtime == NULL)
1110                                 continue;
1111                         err = snd_pcm_suspend(substream);
1112                         if (err < 0 && err != -EBUSY)
1113                                 return err;
1114                 }
1115         }
1116         return 0;
1117 }
1118
1119 EXPORT_SYMBOL(snd_pcm_suspend_all);
1120
1121 /* resume */
1122
1123 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1124 {
1125         struct snd_pcm_runtime *runtime = substream->runtime;
1126         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1127                 return -ENOSYS;
1128         runtime->trigger_master = substream;
1129         return 0;
1130 }
1131
1132 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1133 {
1134         struct snd_pcm_runtime *runtime = substream->runtime;
1135         if (runtime->trigger_master != substream)
1136                 return 0;
1137         /* DMA not running previously? */
1138         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1139             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1140              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1141                 return 0;
1142         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1143 }
1144
1145 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1146 {
1147         if (substream->runtime->trigger_master == substream &&
1148             snd_pcm_running(substream))
1149                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1150 }
1151
1152 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1153 {
1154         struct snd_pcm_runtime *runtime = substream->runtime;
1155         snd_pcm_trigger_tstamp(substream);
1156         if (substream->timer)
1157                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1158                                  &runtime->trigger_tstamp);
1159         runtime->status->state = runtime->status->suspended_state;
1160 }
1161
1162 static struct action_ops snd_pcm_action_resume = {
1163         .pre_action = snd_pcm_pre_resume,
1164         .do_action = snd_pcm_do_resume,
1165         .undo_action = snd_pcm_undo_resume,
1166         .post_action = snd_pcm_post_resume
1167 };
1168
1169 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1170 {
1171         struct snd_card *card = substream->pcm->card;
1172         int res;
1173
1174         snd_power_lock(card);
1175         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1176                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1177         snd_power_unlock(card);
1178         return res;
1179 }
1180
1181 #else
1182
1183 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1184 {
1185         return -ENOSYS;
1186 }
1187
1188 #endif /* CONFIG_PM */
1189
1190 /*
1191  * xrun ioctl
1192  *
1193  * Change the RUNNING stream(s) to XRUN state.
1194  */
1195 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1196 {
1197         struct snd_card *card = substream->pcm->card;
1198         struct snd_pcm_runtime *runtime = substream->runtime;
1199         int result;
1200
1201         snd_power_lock(card);
1202         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1203                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1204                 if (result < 0)
1205                         goto _unlock;
1206         }
1207
1208         snd_pcm_stream_lock_irq(substream);
1209         switch (runtime->status->state) {
1210         case SNDRV_PCM_STATE_XRUN:
1211                 result = 0;     /* already there */
1212                 break;
1213         case SNDRV_PCM_STATE_RUNNING:
1214                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1215                 break;
1216         default:
1217                 result = -EBADFD;
1218         }
1219         snd_pcm_stream_unlock_irq(substream);
1220  _unlock:
1221         snd_power_unlock(card);
1222         return result;
1223 }
1224
1225 /*
1226  * reset ioctl
1227  */
1228 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1229 {
1230         struct snd_pcm_runtime *runtime = substream->runtime;
1231         switch (runtime->status->state) {
1232         case SNDRV_PCM_STATE_RUNNING:
1233         case SNDRV_PCM_STATE_PREPARED:
1234         case SNDRV_PCM_STATE_PAUSED:
1235         case SNDRV_PCM_STATE_SUSPENDED:
1236                 return 0;
1237         default:
1238                 return -EBADFD;
1239         }
1240 }
1241
1242 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1243 {
1244         struct snd_pcm_runtime *runtime = substream->runtime;
1245         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1246         if (err < 0)
1247                 return err;
1248         runtime->hw_ptr_base = 0;
1249         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1250                 runtime->status->hw_ptr % runtime->period_size;
1251         runtime->silence_start = runtime->status->hw_ptr;
1252         runtime->silence_filled = 0;
1253         return 0;
1254 }
1255
1256 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1257 {
1258         struct snd_pcm_runtime *runtime = substream->runtime;
1259         runtime->control->appl_ptr = runtime->status->hw_ptr;
1260         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1261             runtime->silence_size > 0)
1262                 snd_pcm_playback_silence(substream, ULONG_MAX);
1263 }
1264
1265 static struct action_ops snd_pcm_action_reset = {
1266         .pre_action = snd_pcm_pre_reset,
1267         .do_action = snd_pcm_do_reset,
1268         .post_action = snd_pcm_post_reset
1269 };
1270
1271 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1272 {
1273         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1274 }
1275
1276 /*
1277  * prepare ioctl
1278  */
1279 /* we use the second argument for updating f_flags */
1280 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1281                                int f_flags)
1282 {
1283         struct snd_pcm_runtime *runtime = substream->runtime;
1284         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1285             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1286                 return -EBADFD;
1287         if (snd_pcm_running(substream))
1288                 return -EBUSY;
1289         substream->f_flags = f_flags;
1290         return 0;
1291 }
1292
1293 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1294 {
1295         int err;
1296         err = substream->ops->prepare(substream);
1297         if (err < 0)
1298                 return err;
1299         return snd_pcm_do_reset(substream, 0);
1300 }
1301
1302 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1303 {
1304         struct snd_pcm_runtime *runtime = substream->runtime;
1305         runtime->control->appl_ptr = runtime->status->hw_ptr;
1306         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1307 }
1308
1309 static struct action_ops snd_pcm_action_prepare = {
1310         .pre_action = snd_pcm_pre_prepare,
1311         .do_action = snd_pcm_do_prepare,
1312         .post_action = snd_pcm_post_prepare
1313 };
1314
1315 /**
1316  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1317  * @substream: the PCM substream instance
1318  * @file: file to refer f_flags
1319  */
1320 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1321                            struct file *file)
1322 {
1323         int res;
1324         struct snd_card *card = substream->pcm->card;
1325         int f_flags;
1326
1327         if (file)
1328                 f_flags = file->f_flags;
1329         else
1330                 f_flags = substream->f_flags;
1331
1332         snd_power_lock(card);
1333         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1334                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1335                                                substream, f_flags);
1336         snd_power_unlock(card);
1337         return res;
1338 }
1339
1340 /*
1341  * drain ioctl
1342  */
1343
1344 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1345 {
1346         substream->runtime->trigger_master = substream;
1347         return 0;
1348 }
1349
1350 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1351 {
1352         struct snd_pcm_runtime *runtime = substream->runtime;
1353         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1354                 switch (runtime->status->state) {
1355                 case SNDRV_PCM_STATE_PREPARED:
1356                         /* start playback stream if possible */
1357                         if (! snd_pcm_playback_empty(substream)) {
1358                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1359                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1360                         }
1361                         break;
1362                 case SNDRV_PCM_STATE_RUNNING:
1363                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1364                         break;
1365                 default:
1366                         break;
1367                 }
1368         } else {
1369                 /* stop running stream */
1370                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1371                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1372                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1373                         snd_pcm_do_stop(substream, new_state);
1374                         snd_pcm_post_stop(substream, new_state);
1375                 }
1376         }
1377         return 0;
1378 }
1379
1380 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1381 {
1382 }
1383
1384 static struct action_ops snd_pcm_action_drain_init = {
1385         .pre_action = snd_pcm_pre_drain_init,
1386         .do_action = snd_pcm_do_drain_init,
1387         .post_action = snd_pcm_post_drain_init
1388 };
1389
1390 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1391
1392 /*
1393  * Drain the stream(s).
1394  * When the substream is linked, sync until the draining of all playback streams
1395  * is finished.
1396  * After this call, all streams are supposed to be either SETUP or DRAINING
1397  * (capture only) state.
1398  */
1399 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1400                          struct file *file)
1401 {
1402         struct snd_card *card;
1403         struct snd_pcm_runtime *runtime;
1404         struct snd_pcm_substream *s;
1405         wait_queue_t wait;
1406         int result = 0;
1407         int nonblock = 0;
1408
1409         card = substream->pcm->card;
1410         runtime = substream->runtime;
1411
1412         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1413                 return -EBADFD;
1414
1415         snd_power_lock(card);
1416         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1417                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1418                 if (result < 0) {
1419                         snd_power_unlock(card);
1420                         return result;
1421                 }
1422         }
1423
1424         if (file) {
1425                 if (file->f_flags & O_NONBLOCK)
1426                         nonblock = 1;
1427         } else if (substream->f_flags & O_NONBLOCK)
1428                 nonblock = 1;
1429
1430         down_read(&snd_pcm_link_rwsem);
1431         snd_pcm_stream_lock_irq(substream);
1432         /* resume pause */
1433         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1434                 snd_pcm_pause(substream, 0);
1435
1436         /* pre-start/stop - all running streams are changed to DRAINING state */
1437         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1438         if (result < 0)
1439                 goto unlock;
1440         /* in non-blocking, we don't wait in ioctl but let caller poll */
1441         if (nonblock) {
1442                 result = -EAGAIN;
1443                 goto unlock;
1444         }
1445
1446         for (;;) {
1447                 long tout;
1448                 struct snd_pcm_runtime *to_check;
1449                 if (signal_pending(current)) {
1450                         result = -ERESTARTSYS;
1451                         break;
1452                 }
1453                 /* find a substream to drain */
1454                 to_check = NULL;
1455                 snd_pcm_group_for_each_entry(s, substream) {
1456                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1457                                 continue;
1458                         runtime = s->runtime;
1459                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1460                                 to_check = runtime;
1461                                 break;
1462                         }
1463                 }
1464                 if (!to_check)
1465                         break; /* all drained */
1466                 init_waitqueue_entry(&wait, current);
1467                 add_wait_queue(&to_check->sleep, &wait);
1468                 set_current_state(TASK_INTERRUPTIBLE);
1469                 snd_pcm_stream_unlock_irq(substream);
1470                 up_read(&snd_pcm_link_rwsem);
1471                 snd_power_unlock(card);
1472                 tout = schedule_timeout(10 * HZ);
1473                 snd_power_lock(card);
1474                 down_read(&snd_pcm_link_rwsem);
1475                 snd_pcm_stream_lock_irq(substream);
1476                 remove_wait_queue(&to_check->sleep, &wait);
1477                 if (tout == 0) {
1478                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1479                                 result = -ESTRPIPE;
1480                         else {
1481                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1482                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1483                                 result = -EIO;
1484                         }
1485                         break;
1486                 }
1487         }
1488
1489  unlock:
1490         snd_pcm_stream_unlock_irq(substream);
1491         up_read(&snd_pcm_link_rwsem);
1492         snd_power_unlock(card);
1493
1494         return result;
1495 }
1496
1497 /*
1498  * drop ioctl
1499  *
1500  * Immediately put all linked substreams into SETUP state.
1501  */
1502 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1503 {
1504         struct snd_pcm_runtime *runtime;
1505         struct snd_card *card;
1506         int result = 0;
1507         
1508         if (PCM_RUNTIME_CHECK(substream))
1509                 return -ENXIO;
1510         runtime = substream->runtime;
1511         card = substream->pcm->card;
1512
1513         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1514             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1515             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1516                 return -EBADFD;
1517
1518         snd_pcm_stream_lock_irq(substream);
1519         /* resume pause */
1520         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1521                 snd_pcm_pause(substream, 0);
1522
1523         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1524         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1525         snd_pcm_stream_unlock_irq(substream);
1526
1527         return result;
1528 }
1529
1530
1531 /* WARNING: Don't forget to fput back the file */
1532 static struct file *snd_pcm_file_fd(int fd)
1533 {
1534         struct file *file;
1535         struct inode *inode;
1536         unsigned int minor;
1537
1538         file = fget(fd);
1539         if (!file)
1540                 return NULL;
1541         inode = file->f_path.dentry->d_inode;
1542         if (!S_ISCHR(inode->i_mode) ||
1543             imajor(inode) != snd_major) {
1544                 fput(file);
1545                 return NULL;
1546         }
1547         minor = iminor(inode);
1548         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1549             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1550                 fput(file);
1551                 return NULL;
1552         }
1553         return file;
1554 }
1555
1556 /*
1557  * PCM link handling
1558  */
1559 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1560 {
1561         int res = 0;
1562         struct file *file;
1563         struct snd_pcm_file *pcm_file;
1564         struct snd_pcm_substream *substream1;
1565
1566         file = snd_pcm_file_fd(fd);
1567         if (!file)
1568                 return -EBADFD;
1569         pcm_file = file->private_data;
1570         substream1 = pcm_file->substream;
1571         down_write(&snd_pcm_link_rwsem);
1572         write_lock_irq(&snd_pcm_link_rwlock);
1573         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1574             substream->runtime->status->state != substream1->runtime->status->state) {
1575                 res = -EBADFD;
1576                 goto _end;
1577         }
1578         if (snd_pcm_stream_linked(substream1)) {
1579                 res = -EALREADY;
1580                 goto _end;
1581         }
1582         if (!snd_pcm_stream_linked(substream)) {
1583                 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1584                 if (substream->group == NULL) {
1585                         res = -ENOMEM;
1586                         goto _end;
1587                 }
1588                 spin_lock_init(&substream->group->lock);
1589                 INIT_LIST_HEAD(&substream->group->substreams);
1590                 list_add_tail(&substream->link_list, &substream->group->substreams);
1591                 substream->group->count = 1;
1592         }
1593         list_add_tail(&substream1->link_list, &substream->group->substreams);
1594         substream->group->count++;
1595         substream1->group = substream->group;
1596  _end:
1597         write_unlock_irq(&snd_pcm_link_rwlock);
1598         up_write(&snd_pcm_link_rwsem);
1599         fput(file);
1600         return res;
1601 }
1602
1603 static void relink_to_local(struct snd_pcm_substream *substream)
1604 {
1605         substream->group = &substream->self_group;
1606         INIT_LIST_HEAD(&substream->self_group.substreams);
1607         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1608 }
1609
1610 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1611 {
1612         struct snd_pcm_substream *s;
1613         int res = 0;
1614
1615         down_write(&snd_pcm_link_rwsem);
1616         write_lock_irq(&snd_pcm_link_rwlock);
1617         if (!snd_pcm_stream_linked(substream)) {
1618                 res = -EALREADY;
1619                 goto _end;
1620         }
1621         list_del(&substream->link_list);
1622         substream->group->count--;
1623         if (substream->group->count == 1) {     /* detach the last stream, too */
1624                 snd_pcm_group_for_each_entry(s, substream) {
1625                         relink_to_local(s);
1626                         break;
1627                 }
1628                 kfree(substream->group);
1629         }
1630         relink_to_local(substream);
1631        _end:
1632         write_unlock_irq(&snd_pcm_link_rwlock);
1633         up_write(&snd_pcm_link_rwsem);
1634         return res;
1635 }
1636
1637 /*
1638  * hw configurator
1639  */
1640 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1641                                struct snd_pcm_hw_rule *rule)
1642 {
1643         struct snd_interval t;
1644         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1645                      hw_param_interval_c(params, rule->deps[1]), &t);
1646         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1647 }
1648
1649 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1650                                struct snd_pcm_hw_rule *rule)
1651 {
1652         struct snd_interval t;
1653         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1654                      hw_param_interval_c(params, rule->deps[1]), &t);
1655         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1656 }
1657
1658 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1659                                    struct snd_pcm_hw_rule *rule)
1660 {
1661         struct snd_interval t;
1662         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1663                          hw_param_interval_c(params, rule->deps[1]),
1664                          (unsigned long) rule->private, &t);
1665         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1666 }
1667
1668 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1669                                    struct snd_pcm_hw_rule *rule)
1670 {
1671         struct snd_interval t;
1672         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1673                          (unsigned long) rule->private,
1674                          hw_param_interval_c(params, rule->deps[1]), &t);
1675         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1676 }
1677
1678 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1679                                   struct snd_pcm_hw_rule *rule)
1680 {
1681         unsigned int k;
1682         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1683         struct snd_mask m;
1684         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1685         snd_mask_any(&m);
1686         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1687                 int bits;
1688                 if (! snd_mask_test(mask, k))
1689                         continue;
1690                 bits = snd_pcm_format_physical_width(k);
1691                 if (bits <= 0)
1692                         continue; /* ignore invalid formats */
1693                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1694                         snd_mask_reset(&m, k);
1695         }
1696         return snd_mask_refine(mask, &m);
1697 }
1698
1699 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1700                                        struct snd_pcm_hw_rule *rule)
1701 {
1702         struct snd_interval t;
1703         unsigned int k;
1704         t.min = UINT_MAX;
1705         t.max = 0;
1706         t.openmin = 0;
1707         t.openmax = 0;
1708         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1709                 int bits;
1710                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1711                         continue;
1712                 bits = snd_pcm_format_physical_width(k);
1713                 if (bits <= 0)
1714                         continue; /* ignore invalid formats */
1715                 if (t.min > (unsigned)bits)
1716                         t.min = bits;
1717                 if (t.max < (unsigned)bits)
1718                         t.max = bits;
1719         }
1720         t.integer = 1;
1721         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1722 }
1723
1724 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1725 #error "Change this table"
1726 #endif
1727
1728 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1729                                  48000, 64000, 88200, 96000, 176400, 192000 };
1730
1731 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1732         .count = ARRAY_SIZE(rates),
1733         .list = rates,
1734 };
1735
1736 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1737                                 struct snd_pcm_hw_rule *rule)
1738 {
1739         struct snd_pcm_hardware *hw = rule->private;
1740         return snd_interval_list(hw_param_interval(params, rule->var),
1741                                  snd_pcm_known_rates.count,
1742                                  snd_pcm_known_rates.list, hw->rates);
1743 }               
1744
1745 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1746                                             struct snd_pcm_hw_rule *rule)
1747 {
1748         struct snd_interval t;
1749         struct snd_pcm_substream *substream = rule->private;
1750         t.min = 0;
1751         t.max = substream->buffer_bytes_max;
1752         t.openmin = 0;
1753         t.openmax = 0;
1754         t.integer = 1;
1755         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1756 }               
1757
1758 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1759 {
1760         struct snd_pcm_runtime *runtime = substream->runtime;
1761         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1762         int k, err;
1763
1764         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1765                 snd_mask_any(constrs_mask(constrs, k));
1766         }
1767
1768         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1769                 snd_interval_any(constrs_interval(constrs, k));
1770         }
1771
1772         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1773         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1774         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1775         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1776         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1777
1778         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1779                                    snd_pcm_hw_rule_format, NULL,
1780                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1781         if (err < 0)
1782                 return err;
1783         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1784                                   snd_pcm_hw_rule_sample_bits, NULL,
1785                                   SNDRV_PCM_HW_PARAM_FORMAT, 
1786                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1787         if (err < 0)
1788                 return err;
1789         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1790                                   snd_pcm_hw_rule_div, NULL,
1791                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1792         if (err < 0)
1793                 return err;
1794         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1795                                   snd_pcm_hw_rule_mul, NULL,
1796                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1797         if (err < 0)
1798                 return err;
1799         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1800                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1801                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1802         if (err < 0)
1803                 return err;
1804         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1805                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1806                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1807         if (err < 0)
1808                 return err;
1809         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 
1810                                   snd_pcm_hw_rule_div, NULL,
1811                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1812         if (err < 0)
1813                 return err;
1814         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1815                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1816                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1817         if (err < 0)
1818                 return err;
1819         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1820                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1821                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1822         if (err < 0)
1823                 return err;
1824         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 
1825                                   snd_pcm_hw_rule_div, NULL,
1826                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1827         if (err < 0)
1828                 return err;
1829         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1830                                   snd_pcm_hw_rule_div, NULL,
1831                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1832         if (err < 0)
1833                 return err;
1834         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1835                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1836                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1837         if (err < 0)
1838                 return err;
1839         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1840                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1841                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1842         if (err < 0)
1843                 return err;
1844         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1845                                   snd_pcm_hw_rule_mul, NULL,
1846                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1847         if (err < 0)
1848                 return err;
1849         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1850                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1851                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1852         if (err < 0)
1853                 return err;
1854         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1855                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1856                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1857         if (err < 0)
1858                 return err;
1859         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 
1860                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1861                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1862         if (err < 0)
1863                 return err;
1864         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
1865                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1866                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1867         if (err < 0)
1868                 return err;
1869         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 
1870                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1871                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1872         if (err < 0)
1873                 return err;
1874         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 
1875                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1876                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1877         if (err < 0)
1878                 return err;
1879         return 0;
1880 }
1881
1882 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1883 {
1884         struct snd_pcm_runtime *runtime = substream->runtime;
1885         struct snd_pcm_hardware *hw = &runtime->hw;
1886         int err;
1887         unsigned int mask = 0;
1888
1889         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1890                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1891         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1892                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1893         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1894                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1895                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1896                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1897                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1898                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1899                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1900         }
1901         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1902         if (err < 0)
1903                 return err;
1904
1905         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1906         if (err < 0)
1907                 return err;
1908
1909         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1910         if (err < 0)
1911                 return err;
1912
1913         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1914                                            hw->channels_min, hw->channels_max);
1915         if (err < 0)
1916                 return err;
1917
1918         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1919                                            hw->rate_min, hw->rate_max);
1920          if (err < 0)
1921                  return err;
1922
1923         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1924                                            hw->period_bytes_min, hw->period_bytes_max);
1925          if (err < 0)
1926                  return err;
1927
1928         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1929                                            hw->periods_min, hw->periods_max);
1930         if (err < 0)
1931                 return err;
1932
1933         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1934                                            hw->period_bytes_min, hw->buffer_bytes_max);
1935         if (err < 0)
1936                 return err;
1937
1938         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
1939                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1940                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1941         if (err < 0)
1942                 return err;
1943
1944         /* FIXME: remove */
1945         if (runtime->dma_bytes) {
1946                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1947                 if (err < 0)
1948                         return -EINVAL;
1949         }
1950
1951         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1952                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1953                                           snd_pcm_hw_rule_rate, hw,
1954                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1955                 if (err < 0)
1956                         return err;
1957         }
1958
1959         /* FIXME: this belong to lowlevel */
1960         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1961
1962         return 0;
1963 }
1964
1965 static void pcm_release_private(struct snd_pcm_substream *substream)
1966 {
1967         snd_pcm_unlink(substream);
1968 }
1969
1970 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1971 {
1972         substream->ref_count--;
1973         if (substream->ref_count > 0)
1974                 return;
1975
1976         snd_pcm_drop(substream);
1977         if (substream->hw_opened) {
1978                 if (substream->ops->hw_free != NULL)
1979                         substream->ops->hw_free(substream);
1980                 substream->ops->close(substream);
1981                 substream->hw_opened = 0;
1982         }
1983         if (substream->pcm_release) {
1984                 substream->pcm_release(substream);
1985                 substream->pcm_release = NULL;
1986         }
1987         snd_pcm_detach_substream(substream);
1988 }
1989
1990 EXPORT_SYMBOL(snd_pcm_release_substream);
1991
1992 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
1993                            struct file *file,
1994                            struct snd_pcm_substream **rsubstream)
1995 {
1996         struct snd_pcm_substream *substream;
1997         int err;
1998
1999         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2000         if (err < 0)
2001                 return err;
2002         if (substream->ref_count > 1) {
2003                 *rsubstream = substream;
2004                 return 0;
2005         }
2006
2007         err = snd_pcm_hw_constraints_init(substream);
2008         if (err < 0) {
2009                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2010                 goto error;
2011         }
2012
2013         if ((err = substream->ops->open(substream)) < 0)
2014                 goto error;
2015
2016         substream->hw_opened = 1;
2017
2018         err = snd_pcm_hw_constraints_complete(substream);
2019         if (err < 0) {
2020                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2021                 goto error;
2022         }
2023
2024         *rsubstream = substream;
2025         return 0;
2026
2027  error:
2028         snd_pcm_release_substream(substream);
2029         return err;
2030 }
2031
2032 EXPORT_SYMBOL(snd_pcm_open_substream);
2033
2034 static int snd_pcm_open_file(struct file *file,
2035                              struct snd_pcm *pcm,
2036                              int stream,
2037                              struct snd_pcm_file **rpcm_file)
2038 {
2039         struct snd_pcm_file *pcm_file;
2040         struct snd_pcm_substream *substream;
2041         struct snd_pcm_str *str;
2042         int err;
2043
2044         if (rpcm_file)
2045                 *rpcm_file = NULL;
2046
2047         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2048         if (err < 0)
2049                 return err;
2050
2051         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2052         if (pcm_file == NULL) {
2053                 snd_pcm_release_substream(substream);
2054                 return -ENOMEM;
2055         }
2056         pcm_file->substream = substream;
2057         if (substream->ref_count == 1) {
2058                 str = substream->pstr;
2059                 substream->file = pcm_file;
2060                 substream->pcm_release = pcm_release_private;
2061         }
2062         file->private_data = pcm_file;
2063         if (rpcm_file)
2064                 *rpcm_file = pcm_file;
2065         return 0;
2066 }
2067
2068 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2069 {
2070         struct snd_pcm *pcm;
2071
2072         pcm = snd_lookup_minor_data(iminor(inode),
2073                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2074         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2075 }
2076
2077 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2078 {
2079         struct snd_pcm *pcm;
2080
2081         pcm = snd_lookup_minor_data(iminor(inode),
2082                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2083         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2084 }
2085
2086 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2087 {
2088         int err;
2089         struct snd_pcm_file *pcm_file;
2090         wait_queue_t wait;
2091
2092         if (pcm == NULL) {
2093                 err = -ENODEV;
2094                 goto __error1;
2095         }
2096         err = snd_card_file_add(pcm->card, file);
2097         if (err < 0)
2098                 goto __error1;
2099         if (!try_module_get(pcm->card->module)) {
2100                 err = -EFAULT;
2101                 goto __error2;
2102         }
2103         init_waitqueue_entry(&wait, current);
2104         add_wait_queue(&pcm->open_wait, &wait);
2105         mutex_lock(&pcm->open_mutex);
2106         while (1) {
2107                 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2108                 if (err >= 0)
2109                         break;
2110                 if (err == -EAGAIN) {
2111                         if (file->f_flags & O_NONBLOCK) {
2112                                 err = -EBUSY;
2113                                 break;
2114                         }
2115                 } else
2116                         break;
2117                 set_current_state(TASK_INTERRUPTIBLE);
2118                 mutex_unlock(&pcm->open_mutex);
2119                 schedule();
2120                 mutex_lock(&pcm->open_mutex);
2121                 if (signal_pending(current)) {
2122                         err = -ERESTARTSYS;
2123                         break;
2124                 }
2125         }
2126         remove_wait_queue(&pcm->open_wait, &wait);
2127         mutex_unlock(&pcm->open_mutex);
2128         if (err < 0)
2129                 goto __error;
2130         return err;
2131
2132       __error:
2133         module_put(pcm->card->module);
2134       __error2:
2135         snd_card_file_remove(pcm->card, file);
2136       __error1:
2137         return err;
2138 }
2139
2140 static int snd_pcm_release(struct inode *inode, struct file *file)
2141 {
2142         struct snd_pcm *pcm;
2143         struct snd_pcm_substream *substream;
2144         struct snd_pcm_file *pcm_file;
2145
2146         pcm_file = file->private_data;
2147         substream = pcm_file->substream;
2148         if (snd_BUG_ON(!substream))
2149                 return -ENXIO;
2150         pcm = substream->pcm;
2151         mutex_lock(&pcm->open_mutex);
2152         snd_pcm_release_substream(substream);
2153         kfree(pcm_file);
2154         mutex_unlock(&pcm->open_mutex);
2155         wake_up(&pcm->open_wait);
2156         module_put(pcm->card->module);
2157         snd_card_file_remove(pcm->card, file);
2158         return 0;
2159 }
2160
2161 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2162                                                  snd_pcm_uframes_t frames)
2163 {
2164         struct snd_pcm_runtime *runtime = substream->runtime;
2165         snd_pcm_sframes_t appl_ptr;
2166         snd_pcm_sframes_t ret;
2167         snd_pcm_sframes_t hw_avail;
2168
2169         if (frames == 0)
2170                 return 0;
2171
2172         snd_pcm_stream_lock_irq(substream);
2173         switch (runtime->status->state) {
2174         case SNDRV_PCM_STATE_PREPARED:
2175                 break;
2176         case SNDRV_PCM_STATE_DRAINING:
2177         case SNDRV_PCM_STATE_RUNNING:
2178                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2179                         break;
2180                 /* Fall through */
2181         case SNDRV_PCM_STATE_XRUN:
2182                 ret = -EPIPE;
2183                 goto __end;
2184         case SNDRV_PCM_STATE_SUSPENDED:
2185                 ret = -ESTRPIPE;
2186                 goto __end;
2187         default:
2188                 ret = -EBADFD;
2189                 goto __end;
2190         }
2191
2192         hw_avail = snd_pcm_playback_hw_avail(runtime);
2193         if (hw_avail <= 0) {
2194                 ret = 0;
2195                 goto __end;
2196         }
2197         if (frames > (snd_pcm_uframes_t)hw_avail)
2198                 frames = hw_avail;
2199         appl_ptr = runtime->control->appl_ptr - frames;
2200         if (appl_ptr < 0)
2201                 appl_ptr += runtime->boundary;
2202         runtime->control->appl_ptr = appl_ptr;
2203         ret = frames;
2204  __end:
2205         snd_pcm_stream_unlock_irq(substream);
2206         return ret;
2207 }
2208
2209 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2210                                                 snd_pcm_uframes_t frames)
2211 {
2212         struct snd_pcm_runtime *runtime = substream->runtime;
2213         snd_pcm_sframes_t appl_ptr;
2214         snd_pcm_sframes_t ret;
2215         snd_pcm_sframes_t hw_avail;
2216
2217         if (frames == 0)
2218                 return 0;
2219
2220         snd_pcm_stream_lock_irq(substream);
2221         switch (runtime->status->state) {
2222         case SNDRV_PCM_STATE_PREPARED:
2223         case SNDRV_PCM_STATE_DRAINING:
2224                 break;
2225         case SNDRV_PCM_STATE_RUNNING:
2226                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2227                         break;
2228                 /* Fall through */
2229         case SNDRV_PCM_STATE_XRUN:
2230                 ret = -EPIPE;
2231                 goto __end;
2232         case SNDRV_PCM_STATE_SUSPENDED:
2233                 ret = -ESTRPIPE;
2234                 goto __end;
2235         default:
2236                 ret = -EBADFD;
2237                 goto __end;
2238         }
2239
2240         hw_avail = snd_pcm_capture_hw_avail(runtime);
2241         if (hw_avail <= 0) {
2242                 ret = 0;
2243                 goto __end;
2244         }
2245         if (frames > (snd_pcm_uframes_t)hw_avail)
2246                 frames = hw_avail;
2247         appl_ptr = runtime->control->appl_ptr - frames;
2248         if (appl_ptr < 0)
2249                 appl_ptr += runtime->boundary;
2250         runtime->control->appl_ptr = appl_ptr;
2251         ret = frames;
2252  __end:
2253         snd_pcm_stream_unlock_irq(substream);
2254         return ret;
2255 }
2256
2257 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2258                                                   snd_pcm_uframes_t frames)
2259 {
2260         struct snd_pcm_runtime *runtime = substream->runtime;
2261         snd_pcm_sframes_t appl_ptr;
2262         snd_pcm_sframes_t ret;
2263         snd_pcm_sframes_t avail;
2264
2265         if (frames == 0)
2266                 return 0;
2267
2268         snd_pcm_stream_lock_irq(substream);
2269         switch (runtime->status->state) {
2270         case SNDRV_PCM_STATE_PREPARED:
2271         case SNDRV_PCM_STATE_PAUSED:
2272                 break;
2273         case SNDRV_PCM_STATE_DRAINING:
2274         case SNDRV_PCM_STATE_RUNNING:
2275                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2276                         break;
2277                 /* Fall through */
2278         case SNDRV_PCM_STATE_XRUN:
2279                 ret = -EPIPE;
2280                 goto __end;
2281         case SNDRV_PCM_STATE_SUSPENDED:
2282                 ret = -ESTRPIPE;
2283                 goto __end;
2284         default:
2285                 ret = -EBADFD;
2286                 goto __end;
2287         }
2288
2289         avail = snd_pcm_playback_avail(runtime);
2290         if (avail <= 0) {
2291                 ret = 0;
2292                 goto __end;
2293         }
2294         if (frames > (snd_pcm_uframes_t)avail)
2295                 frames = avail;
2296         appl_ptr = runtime->control->appl_ptr + frames;
2297         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2298                 appl_ptr -= runtime->boundary;
2299         runtime->control->appl_ptr = appl_ptr;
2300         ret = frames;
2301  __end:
2302         snd_pcm_stream_unlock_irq(substream);
2303         return ret;
2304 }
2305
2306 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2307                                                  snd_pcm_uframes_t frames)
2308 {
2309         struct snd_pcm_runtime *runtime = substream->runtime;
2310         snd_pcm_sframes_t appl_ptr;
2311         snd_pcm_sframes_t ret;
2312         snd_pcm_sframes_t avail;
2313
2314         if (frames == 0)
2315                 return 0;
2316
2317         snd_pcm_stream_lock_irq(substream);
2318         switch (runtime->status->state) {
2319         case SNDRV_PCM_STATE_PREPARED:
2320         case SNDRV_PCM_STATE_DRAINING:
2321         case SNDRV_PCM_STATE_PAUSED:
2322                 break;
2323         case SNDRV_PCM_STATE_RUNNING:
2324                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2325                         break;
2326                 /* Fall through */
2327         case SNDRV_PCM_STATE_XRUN:
2328                 ret = -EPIPE;
2329                 goto __end;
2330         case SNDRV_PCM_STATE_SUSPENDED:
2331                 ret = -ESTRPIPE;
2332                 goto __end;
2333         default:
2334                 ret = -EBADFD;
2335                 goto __end;
2336         }
2337
2338         avail = snd_pcm_capture_avail(runtime);
2339         if (avail <= 0) {
2340                 ret = 0;
2341                 goto __end;
2342         }
2343         if (frames > (snd_pcm_uframes_t)avail)
2344                 frames = avail;
2345         appl_ptr = runtime->control->appl_ptr + frames;
2346         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2347                 appl_ptr -= runtime->boundary;
2348         runtime->control->appl_ptr = appl_ptr;
2349         ret = frames;
2350  __end:
2351         snd_pcm_stream_unlock_irq(substream);
2352         return ret;
2353 }
2354
2355 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2356 {
2357         struct snd_pcm_runtime *runtime = substream->runtime;
2358         int err;
2359
2360         snd_pcm_stream_lock_irq(substream);
2361         switch (runtime->status->state) {
2362         case SNDRV_PCM_STATE_DRAINING:
2363                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2364                         goto __badfd;
2365         case SNDRV_PCM_STATE_RUNNING:
2366                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2367                         break;
2368                 /* Fall through */
2369         case SNDRV_PCM_STATE_PREPARED:
2370         case SNDRV_PCM_STATE_SUSPENDED:
2371                 err = 0;
2372                 break;
2373         case SNDRV_PCM_STATE_XRUN:
2374                 err = -EPIPE;
2375                 break;
2376         default:
2377               __badfd:
2378                 err = -EBADFD;
2379                 break;
2380         }
2381         snd_pcm_stream_unlock_irq(substream);
2382         return err;
2383 }
2384                 
2385 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2386                          snd_pcm_sframes_t __user *res)
2387 {
2388         struct snd_pcm_runtime *runtime = substream->runtime;
2389         int err;
2390         snd_pcm_sframes_t n = 0;
2391
2392         snd_pcm_stream_lock_irq(substream);
2393         switch (runtime->status->state) {
2394         case SNDRV_PCM_STATE_DRAINING:
2395                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2396                         goto __badfd;
2397         case SNDRV_PCM_STATE_RUNNING:
2398                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2399                         break;
2400                 /* Fall through */
2401         case SNDRV_PCM_STATE_PREPARED:
2402         case SNDRV_PCM_STATE_SUSPENDED:
2403                 err = 0;
2404                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2405                         n = snd_pcm_playback_hw_avail(runtime);
2406                 else
2407                         n = snd_pcm_capture_avail(runtime);
2408                 n += runtime->delay;
2409                 break;
2410         case SNDRV_PCM_STATE_XRUN:
2411                 err = -EPIPE;
2412                 break;
2413         default:
2414               __badfd:
2415                 err = -EBADFD;
2416                 break;
2417         }
2418         snd_pcm_stream_unlock_irq(substream);
2419         if (!err)
2420                 if (put_user(n, res))
2421                         err = -EFAULT;
2422         return err;
2423 }
2424                 
2425 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2426                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2427 {
2428         struct snd_pcm_runtime *runtime = substream->runtime;
2429         struct snd_pcm_sync_ptr sync_ptr;
2430         volatile struct snd_pcm_mmap_status *status;
2431         volatile struct snd_pcm_mmap_control *control;
2432         int err;
2433
2434         memset(&sync_ptr, 0, sizeof(sync_ptr));
2435         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2436                 return -EFAULT;
2437         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2438                 return -EFAULT; 
2439         status = runtime->status;
2440         control = runtime->control;
2441         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2442                 err = snd_pcm_hwsync(substream);
2443                 if (err < 0)
2444                         return err;
2445         }
2446         snd_pcm_stream_lock_irq(substream);
2447         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2448                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2449         else
2450                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2451         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2452                 control->avail_min = sync_ptr.c.control.avail_min;
2453         else
2454                 sync_ptr.c.control.avail_min = control->avail_min;
2455         sync_ptr.s.status.state = status->state;
2456         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2457         sync_ptr.s.status.tstamp = status->tstamp;
2458         sync_ptr.s.status.suspended_state = status->suspended_state;
2459         snd_pcm_stream_unlock_irq(substream);
2460         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2461                 return -EFAULT;
2462         return 0;
2463 }
2464
2465 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2466 {
2467         struct snd_pcm_runtime *runtime = substream->runtime;
2468         int arg;
2469         
2470         if (get_user(arg, _arg))
2471                 return -EFAULT;
2472         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2473                 return -EINVAL;
2474         runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2475         if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2476                 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2477         return 0;
2478 }
2479                 
2480 static int snd_pcm_common_ioctl1(struct file *file,
2481                                  struct snd_pcm_substream *substream,
2482                                  unsigned int cmd, void __user *arg)
2483 {
2484         switch (cmd) {
2485         case SNDRV_PCM_IOCTL_PVERSION:
2486                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2487         case SNDRV_PCM_IOCTL_INFO:
2488                 return snd_pcm_info_user(substream, arg);
2489         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2490                 return 0;
2491         case SNDRV_PCM_IOCTL_TTSTAMP:
2492                 return snd_pcm_tstamp(substream, arg);
2493         case SNDRV_PCM_IOCTL_HW_REFINE:
2494                 return snd_pcm_hw_refine_user(substream, arg);
2495         case SNDRV_PCM_IOCTL_HW_PARAMS:
2496                 return snd_pcm_hw_params_user(substream, arg);
2497         case SNDRV_PCM_IOCTL_HW_FREE:
2498                 return snd_pcm_hw_free(substream);
2499         case SNDRV_PCM_IOCTL_SW_PARAMS:
2500                 return snd_pcm_sw_params_user(substream, arg);
2501         case SNDRV_PCM_IOCTL_STATUS:
2502                 return snd_pcm_status_user(substream, arg);
2503         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2504                 return snd_pcm_channel_info_user(substream, arg);
2505         case SNDRV_PCM_IOCTL_PREPARE:
2506                 return snd_pcm_prepare(substream, file);
2507         case SNDRV_PCM_IOCTL_RESET:
2508                 return snd_pcm_reset(substream);
2509         case SNDRV_PCM_IOCTL_START:
2510                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2511         case SNDRV_PCM_IOCTL_LINK:
2512                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2513         case SNDRV_PCM_IOCTL_UNLINK:
2514                 return snd_pcm_unlink(substream);
2515         case SNDRV_PCM_IOCTL_RESUME:
2516                 return snd_pcm_resume(substream);
2517         case SNDRV_PCM_IOCTL_XRUN:
2518                 return snd_pcm_xrun(substream);
2519         case SNDRV_PCM_IOCTL_HWSYNC:
2520                 return snd_pcm_hwsync(substream);
2521         case SNDRV_PCM_IOCTL_DELAY:
2522                 return snd_pcm_delay(substream, arg);
2523         case SNDRV_PCM_IOCTL_SYNC_PTR:
2524                 return snd_pcm_sync_ptr(substream, arg);
2525 #ifdef CONFIG_SND_SUPPORT_OLD_API
2526         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2527                 return snd_pcm_hw_refine_old_user(substream, arg);
2528         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2529                 return snd_pcm_hw_params_old_user(substream, arg);
2530 #endif
2531         case SNDRV_PCM_IOCTL_DRAIN:
2532                 return snd_pcm_drain(substream, file);
2533         case SNDRV_PCM_IOCTL_DROP:
2534                 return snd_pcm_drop(substream);
2535         case SNDRV_PCM_IOCTL_PAUSE:
2536         {
2537                 int res;
2538                 snd_pcm_stream_lock_irq(substream);
2539                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2540                 snd_pcm_stream_unlock_irq(substream);
2541                 return res;
2542         }
2543         }
2544         snd_printd("unknown ioctl = 0x%x\n", cmd);
2545         return -ENOTTY;
2546 }
2547
2548 static int snd_pcm_playback_ioctl1(struct file *file,
2549                                    struct snd_pcm_substream *substream,
2550                                    unsigned int cmd, void __user *arg)
2551 {
2552         if (snd_BUG_ON(!substream))
2553                 return -ENXIO;
2554         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2555                 return -EINVAL;
2556         switch (cmd) {
2557         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2558         {
2559                 struct snd_xferi xferi;
2560                 struct snd_xferi __user *_xferi = arg;
2561                 struct snd_pcm_runtime *runtime = substream->runtime;
2562                 snd_pcm_sframes_t result;
2563                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2564                         return -EBADFD;
2565                 if (put_user(0, &_xferi->result))
2566                         return -EFAULT;
2567                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2568                         return -EFAULT;
2569                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2570                 __put_user(result, &_xferi->result);
2571                 return result < 0 ? result : 0;
2572         }
2573         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2574         {
2575                 struct snd_xfern xfern;
2576                 struct snd_xfern __user *_xfern = arg;
2577                 struct snd_pcm_runtime *runtime = substream->runtime;
2578                 void __user **bufs;
2579                 snd_pcm_sframes_t result;
2580                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2581                         return -EBADFD;
2582                 if (runtime->channels > 128)
2583                         return -EINVAL;
2584                 if (put_user(0, &_xfern->result))
2585                         return -EFAULT;
2586                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2587                         return -EFAULT;
2588
2589                 bufs = memdup_user(xfern.bufs,
2590                                    sizeof(void *) * runtime->channels);
2591                 if (IS_ERR(bufs))
2592                         return PTR_ERR(bufs);
2593                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2594                 kfree(bufs);
2595                 __put_user(result, &_xfern->result);
2596                 return result < 0 ? result : 0;
2597         }
2598         case SNDRV_PCM_IOCTL_REWIND:
2599         {
2600                 snd_pcm_uframes_t frames;
2601                 snd_pcm_uframes_t __user *_frames = arg;
2602                 snd_pcm_sframes_t result;
2603                 if (get_user(frames, _frames))
2604                         return -EFAULT;
2605                 if (put_user(0, _frames))
2606                         return -EFAULT;
2607                 result = snd_pcm_playback_rewind(substream, frames);
2608                 __put_user(result, _frames);
2609                 return result < 0 ? result : 0;
2610         }
2611         case SNDRV_PCM_IOCTL_FORWARD:
2612         {
2613                 snd_pcm_uframes_t frames;
2614                 snd_pcm_uframes_t __user *_frames = arg;
2615                 snd_pcm_sframes_t result;
2616                 if (get_user(frames, _frames))
2617                         return -EFAULT;
2618                 if (put_user(0, _frames))
2619                         return -EFAULT;
2620                 result = snd_pcm_playback_forward(substream, frames);
2621                 __put_user(result, _frames);
2622                 return result < 0 ? result : 0;
2623         }
2624         }
2625         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2626 }
2627
2628 static int snd_pcm_capture_ioctl1(struct file *file,
2629                                   struct snd_pcm_substream *substream,
2630                                   unsigned int cmd, void __user *arg)
2631 {
2632         if (snd_BUG_ON(!substream))
2633                 return -ENXIO;
2634         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2635                 return -EINVAL;
2636         switch (cmd) {
2637         case SNDRV_PCM_IOCTL_READI_FRAMES:
2638         {
2639                 struct snd_xferi xferi;
2640                 struct snd_xferi __user *_xferi = arg;
2641                 struct snd_pcm_runtime *runtime = substream->runtime;
2642                 snd_pcm_sframes_t result;
2643                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2644                         return -EBADFD;
2645                 if (put_user(0, &_xferi->result))
2646                         return -EFAULT;
2647                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2648                         return -EFAULT;
2649                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2650                 __put_user(result, &_xferi->result);
2651                 return result < 0 ? result : 0;
2652         }
2653         case SNDRV_PCM_IOCTL_READN_FRAMES:
2654         {
2655                 struct snd_xfern xfern;
2656                 struct snd_xfern __user *_xfern = arg;
2657                 struct snd_pcm_runtime *runtime = substream->runtime;
2658                 void *bufs;
2659                 snd_pcm_sframes_t result;
2660                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2661                         return -EBADFD;
2662                 if (runtime->channels > 128)
2663                         return -EINVAL;
2664                 if (put_user(0, &_xfern->result))
2665                         return -EFAULT;
2666                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2667                         return -EFAULT;
2668
2669                 bufs = memdup_user(xfern.bufs,
2670                                    sizeof(void *) * runtime->channels);
2671                 if (IS_ERR(bufs))
2672                         return PTR_ERR(bufs);
2673                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2674                 kfree(bufs);
2675                 __put_user(result, &_xfern->result);
2676                 return result < 0 ? result : 0;
2677         }
2678         case SNDRV_PCM_IOCTL_REWIND:
2679         {
2680                 snd_pcm_uframes_t frames;
2681                 snd_pcm_uframes_t __user *_frames = arg;
2682                 snd_pcm_sframes_t result;
2683                 if (get_user(frames, _frames))
2684                         return -EFAULT;
2685                 if (put_user(0, _frames))
2686                         return -EFAULT;
2687                 result = snd_pcm_capture_rewind(substream, frames);
2688                 __put_user(result, _frames);
2689                 return result < 0 ? result : 0;
2690         }
2691         case SNDRV_PCM_IOCTL_FORWARD:
2692         {
2693                 snd_pcm_uframes_t frames;
2694                 snd_pcm_uframes_t __user *_frames = arg;
2695                 snd_pcm_sframes_t result;
2696                 if (get_user(frames, _frames))
2697                         return -EFAULT;
2698                 if (put_user(0, _frames))
2699                         return -EFAULT;
2700                 result = snd_pcm_capture_forward(substream, frames);
2701                 __put_user(result, _frames);
2702                 return result < 0 ? result : 0;
2703         }
2704         }
2705         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2706 }
2707
2708 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2709                                    unsigned long arg)
2710 {
2711         struct snd_pcm_file *pcm_file;
2712
2713         pcm_file = file->private_data;
2714
2715         if (((cmd >> 8) & 0xff) != 'A')
2716                 return -ENOTTY;
2717
2718         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2719                                        (void __user *)arg);
2720 }
2721
2722 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2723                                   unsigned long arg)
2724 {
2725         struct snd_pcm_file *pcm_file;
2726
2727         pcm_file = file->private_data;
2728
2729         if (((cmd >> 8) & 0xff) != 'A')
2730                 return -ENOTTY;
2731
2732         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2733                                       (void __user *)arg);
2734 }
2735
2736 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2737                          unsigned int cmd, void *arg)
2738 {
2739         mm_segment_t fs;
2740         int result;
2741         
2742         fs = snd_enter_user();
2743         switch (substream->stream) {
2744         case SNDRV_PCM_STREAM_PLAYBACK:
2745                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2746                                                  (void __user *)arg);
2747                 break;
2748         case SNDRV_PCM_STREAM_CAPTURE:
2749                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2750                                                 (void __user *)arg);
2751                 break;
2752         default:
2753                 result = -EINVAL;
2754                 break;
2755         }
2756         snd_leave_user(fs);
2757         return result;
2758 }
2759
2760 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2761
2762 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2763                             loff_t * offset)
2764 {
2765         struct snd_pcm_file *pcm_file;
2766         struct snd_pcm_substream *substream;
2767         struct snd_pcm_runtime *runtime;
2768         snd_pcm_sframes_t result;
2769
2770         pcm_file = file->private_data;
2771         substream = pcm_file->substream;
2772         if (PCM_RUNTIME_CHECK(substream))
2773                 return -ENXIO;
2774         runtime = substream->runtime;
2775         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2776                 return -EBADFD;
2777         if (!frame_aligned(runtime, count))
2778                 return -EINVAL;
2779         count = bytes_to_frames(runtime, count);
2780         result = snd_pcm_lib_read(substream, buf, count);
2781         if (result > 0)
2782                 result = frames_to_bytes(runtime, result);
2783         return result;
2784 }
2785
2786 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2787                              size_t count, loff_t * offset)
2788 {
2789         struct snd_pcm_file *pcm_file;
2790         struct snd_pcm_substream *substream;
2791         struct snd_pcm_runtime *runtime;
2792         snd_pcm_sframes_t result;
2793
2794         pcm_file = file->private_data;
2795         substream = pcm_file->substream;
2796         if (PCM_RUNTIME_CHECK(substream))
2797                 return -ENXIO;
2798         runtime = substream->runtime;
2799         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2800                 return -EBADFD;
2801         if (!frame_aligned(runtime, count))
2802                 return -EINVAL;
2803         count = bytes_to_frames(runtime, count);
2804         result = snd_pcm_lib_write(substream, buf, count);
2805         if (result > 0)
2806                 result = frames_to_bytes(runtime, result);
2807         return result;
2808 }
2809
2810 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2811                              unsigned long nr_segs, loff_t pos)
2812
2813 {
2814         struct snd_pcm_file *pcm_file;
2815         struct snd_pcm_substream *substream;
2816         struct snd_pcm_runtime *runtime;
2817         snd_pcm_sframes_t result;
2818         unsigned long i;
2819         void __user **bufs;
2820         snd_pcm_uframes_t frames;
2821
2822         pcm_file = iocb->ki_filp->private_data;
2823         substream = pcm_file->substream;
2824         if (PCM_RUNTIME_CHECK(substream))
2825                 return -ENXIO;
2826         runtime = substream->runtime;
2827         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2828                 return -EBADFD;
2829         if (nr_segs > 1024 || nr_segs != runtime->channels)
2830                 return -EINVAL;
2831         if (!frame_aligned(runtime, iov->iov_len))
2832                 return -EINVAL;
2833         frames = bytes_to_samples(runtime, iov->iov_len);
2834         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2835         if (bufs == NULL)
2836                 return -ENOMEM;
2837         for (i = 0; i < nr_segs; ++i)
2838                 bufs[i] = iov[i].iov_base;
2839         result = snd_pcm_lib_readv(substream, bufs, frames);
2840         if (result > 0)
2841                 result = frames_to_bytes(runtime, result);
2842         kfree(bufs);
2843         return result;
2844 }
2845
2846 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2847                               unsigned long nr_segs, loff_t pos)
2848 {
2849         struct snd_pcm_file *pcm_file;
2850         struct snd_pcm_substream *substream;
2851         struct snd_pcm_runtime *runtime;
2852         snd_pcm_sframes_t result;
2853         unsigned long i;
2854         void __user **bufs;
2855         snd_pcm_uframes_t frames;
2856
2857         pcm_file = iocb->ki_filp->private_data;
2858         substream = pcm_file->substream;
2859         if (PCM_RUNTIME_CHECK(substream))
2860                 return -ENXIO;
2861         runtime = substream->runtime;
2862         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2863                 return -EBADFD;
2864         if (nr_segs > 128 || nr_segs != runtime->channels ||
2865             !frame_aligned(runtime, iov->iov_len))
2866                 return -EINVAL;
2867         frames = bytes_to_samples(runtime, iov->iov_len);
2868         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2869         if (bufs == NULL)
2870                 return -ENOMEM;
2871         for (i = 0; i < nr_segs; ++i)
2872                 bufs[i] = iov[i].iov_base;
2873         result = snd_pcm_lib_writev(substream, bufs, frames);
2874         if (result > 0)
2875                 result = frames_to_bytes(runtime, result);
2876         kfree(bufs);
2877         return result;
2878 }
2879
2880 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2881 {
2882         struct snd_pcm_file *pcm_file;
2883         struct snd_pcm_substream *substream;
2884         struct snd_pcm_runtime *runtime;
2885         unsigned int mask;
2886         snd_pcm_uframes_t avail;
2887
2888         pcm_file = file->private_data;
2889
2890         substream = pcm_file->substream;
2891         if (PCM_RUNTIME_CHECK(substream))
2892                 return -ENXIO;
2893         runtime = substream->runtime;
2894
2895         poll_wait(file, &runtime->sleep, wait);
2896
2897         snd_pcm_stream_lock_irq(substream);
2898         avail = snd_pcm_playback_avail(runtime);
2899         switch (runtime->status->state) {
2900         case SNDRV_PCM_STATE_RUNNING:
2901         case SNDRV_PCM_STATE_PREPARED:
2902         case SNDRV_PCM_STATE_PAUSED:
2903                 if (avail >= runtime->control->avail_min) {
2904                         mask = POLLOUT | POLLWRNORM;
2905                         break;
2906                 }
2907                 /* Fall through */
2908         case SNDRV_PCM_STATE_DRAINING:
2909                 mask = 0;
2910                 break;
2911         default:
2912                 mask = POLLOUT | POLLWRNORM | POLLERR;
2913                 break;
2914         }
2915         snd_pcm_stream_unlock_irq(substream);
2916         return mask;
2917 }
2918
2919 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2920 {
2921         struct snd_pcm_file *pcm_file;
2922         struct snd_pcm_substream *substream;
2923         struct snd_pcm_runtime *runtime;
2924         unsigned int mask;
2925         snd_pcm_uframes_t avail;
2926
2927         pcm_file = file->private_data;
2928
2929         substream = pcm_file->substream;
2930         if (PCM_RUNTIME_CHECK(substream))
2931                 return -ENXIO;
2932         runtime = substream->runtime;
2933
2934         poll_wait(file, &runtime->sleep, wait);
2935
2936         snd_pcm_stream_lock_irq(substream);
2937         avail = snd_pcm_capture_avail(runtime);
2938         switch (runtime->status->state) {
2939         case SNDRV_PCM_STATE_RUNNING:
2940         case SNDRV_PCM_STATE_PREPARED:
2941         case SNDRV_PCM_STATE_PAUSED:
2942                 if (avail >= runtime->control->avail_min) {
2943                         mask = POLLIN | POLLRDNORM;
2944                         break;
2945                 }
2946                 mask = 0;
2947                 break;
2948         case SNDRV_PCM_STATE_DRAINING:
2949                 if (avail > 0) {
2950                         mask = POLLIN | POLLRDNORM;
2951                         break;
2952                 }
2953                 /* Fall through */
2954         default:
2955                 mask = POLLIN | POLLRDNORM | POLLERR;
2956                 break;
2957         }
2958         snd_pcm_stream_unlock_irq(substream);
2959         return mask;
2960 }
2961
2962 /*
2963  * mmap support
2964  */
2965
2966 /*
2967  * Only on coherent architectures, we can mmap the status and the control records
2968  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
2969  */
2970 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2971 /*
2972  * mmap status record
2973  */
2974 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2975                                                 struct vm_fault *vmf)
2976 {
2977         struct snd_pcm_substream *substream = area->vm_private_data;
2978         struct snd_pcm_runtime *runtime;
2979         
2980         if (substream == NULL)
2981                 return VM_FAULT_SIGBUS;
2982         runtime = substream->runtime;
2983         vmf->page = virt_to_page(runtime->status);
2984         get_page(vmf->page);
2985         return 0;
2986 }
2987
2988 static const struct vm_operations_struct snd_pcm_vm_ops_status =
2989 {
2990         .fault =        snd_pcm_mmap_status_fault,
2991 };
2992
2993 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
2994                                struct vm_area_struct *area)
2995 {
2996         struct snd_pcm_runtime *runtime;
2997         long size;
2998         if (!(area->vm_flags & VM_READ))
2999                 return -EINVAL;
3000         runtime = substream->runtime;
3001         size = area->vm_end - area->vm_start;
3002         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3003                 return -EINVAL;
3004         area->vm_ops = &snd_pcm_vm_ops_status;
3005         area->vm_private_data = substream;
3006         area->vm_flags |= VM_RESERVED;
3007         return 0;
3008 }
3009
3010 /*
3011  * mmap control record
3012  */
3013 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3014                                                 struct vm_fault *vmf)
3015 {
3016         struct snd_pcm_substream *substream = area->vm_private_data;
3017         struct snd_pcm_runtime *runtime;
3018         
3019         if (substream == NULL)
3020                 return VM_FAULT_SIGBUS;
3021         runtime = substream->runtime;
3022         vmf->page = virt_to_page(runtime->control);
3023         get_page(vmf->page);
3024         return 0;
3025 }
3026
3027 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3028 {
3029         .fault =        snd_pcm_mmap_control_fault,
3030 };
3031
3032 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3033                                 struct vm_area_struct *area)
3034 {
3035         struct snd_pcm_runtime *runtime;
3036         long size;
3037         if (!(area->vm_flags & VM_READ))
3038                 return -EINVAL;
3039         runtime = substream->runtime;
3040         size = area->vm_end - area->vm_start;
3041         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3042                 return -EINVAL;
3043         area->vm_ops = &snd_pcm_vm_ops_control;
3044         area->vm_private_data = substream;
3045         area->vm_flags |= VM_RESERVED;
3046         return 0;
3047 }
3048 #else /* ! coherent mmap */
3049 /*
3050  * don't support mmap for status and control records.
3051  */
3052 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3053                                struct vm_area_struct *area)
3054 {
3055         return -ENXIO;
3056 }
3057 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3058                                 struct vm_area_struct *area)
3059 {
3060         return -ENXIO;
3061 }
3062 #endif /* coherent mmap */
3063
3064 /*
3065  * fault callback for mmapping a RAM page
3066  */
3067 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3068                                                 struct vm_fault *vmf)
3069 {
3070         struct snd_pcm_substream *substream = area->vm_private_data;
3071         struct snd_pcm_runtime *runtime;
3072         unsigned long offset;
3073         struct page * page;
3074         void *vaddr;
3075         size_t dma_bytes;
3076         
3077         if (substream == NULL)
3078                 return VM_FAULT_SIGBUS;
3079         runtime = substream->runtime;
3080         offset = vmf->pgoff << PAGE_SHIFT;
3081         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3082         if (offset > dma_bytes - PAGE_SIZE)
3083                 return VM_FAULT_SIGBUS;
3084         if (substream->ops->page) {
3085                 page = substream->ops->page(substream, offset);
3086                 if (!page)
3087                         return VM_FAULT_SIGBUS;
3088         } else {
3089                 vaddr = runtime->dma_area + offset;
3090                 page = virt_to_page(vaddr);
3091         }
3092         get_page(page);
3093         vmf->page = page;
3094         return 0;
3095 }
3096
3097 static const struct vm_operations_struct snd_pcm_vm_ops_data =
3098 {
3099         .open =         snd_pcm_mmap_data_open,
3100         .close =        snd_pcm_mmap_data_close,
3101         .fault =        snd_pcm_mmap_data_fault,
3102 };
3103
3104 /*
3105  * mmap the DMA buffer on RAM
3106  */
3107 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3108                                 struct vm_area_struct *area)
3109 {
3110         area->vm_ops = &snd_pcm_vm_ops_data;
3111         area->vm_private_data = substream;
3112         area->vm_flags |= VM_RESERVED;
3113         atomic_inc(&substream->mmap_count);
3114         return 0;
3115 }
3116
3117 /*
3118  * mmap the DMA buffer on I/O memory area
3119  */
3120 #if SNDRV_PCM_INFO_MMAP_IOMEM
3121 static const struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3122 {
3123         .open =         snd_pcm_mmap_data_open,
3124         .close =        snd_pcm_mmap_data_close,
3125 };
3126
3127 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3128                            struct vm_area_struct *area)
3129 {
3130         long size;
3131         unsigned long offset;
3132
3133 #ifdef pgprot_noncached
3134         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3135 #endif
3136         area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3137         area->vm_private_data = substream;
3138         area->vm_flags |= VM_IO;
3139         size = area->vm_end - area->vm_start;
3140         offset = area->vm_pgoff << PAGE_SHIFT;
3141         if (io_remap_pfn_range(area, area->vm_start,
3142                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3143                                 size, area->vm_page_prot))
3144                 return -EAGAIN;
3145         atomic_inc(&substream->mmap_count);
3146         return 0;
3147 }
3148
3149 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3150 #endif /* SNDRV_PCM_INFO_MMAP */
3151
3152 /*
3153  * mmap DMA buffer
3154  */
3155 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3156                       struct vm_area_struct *area)
3157 {
3158         struct snd_pcm_runtime *runtime;
3159         long size;
3160         unsigned long offset;
3161         size_t dma_bytes;
3162
3163         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3164                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3165                         return -EINVAL;
3166         } else {
3167                 if (!(area->vm_flags & VM_READ))
3168                         return -EINVAL;
3169         }
3170         runtime = substream->runtime;
3171         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3172                 return -EBADFD;
3173         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3174                 return -ENXIO;
3175         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3176             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3177                 return -EINVAL;
3178         size = area->vm_end - area->vm_start;
3179         offset = area->vm_pgoff << PAGE_SHIFT;
3180         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3181         if ((size_t)size > dma_bytes)
3182                 return -EINVAL;
3183         if (offset > dma_bytes - size)
3184                 return -EINVAL;
3185
3186         if (substream->ops->mmap)
3187                 return substream->ops->mmap(substream, area);
3188         else
3189                 return snd_pcm_default_mmap(substream, area);
3190 }
3191
3192 EXPORT_SYMBOL(snd_pcm_mmap_data);
3193
3194 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3195 {
3196         struct snd_pcm_file * pcm_file;
3197         struct snd_pcm_substream *substream;    
3198         unsigned long offset;
3199         
3200         pcm_file = file->private_data;
3201         substream = pcm_file->substream;
3202         if (PCM_RUNTIME_CHECK(substream))
3203                 return -ENXIO;
3204
3205         offset = area->vm_pgoff << PAGE_SHIFT;
3206         switch (offset) {
3207         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3208                 if (pcm_file->no_compat_mmap)
3209                         return -ENXIO;
3210                 return snd_pcm_mmap_status(substream, file, area);
3211         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3212                 if (pcm_file->no_compat_mmap)
3213                         return -ENXIO;
3214                 return snd_pcm_mmap_control(substream, file, area);
3215         default:
3216                 return snd_pcm_mmap_data(substream, file, area);
3217         }
3218         return 0;
3219 }
3220
3221 static int snd_pcm_fasync(int fd, struct file * file, int on)
3222 {
3223         struct snd_pcm_file * pcm_file;
3224         struct snd_pcm_substream *substream;
3225         struct snd_pcm_runtime *runtime;
3226         int err = -ENXIO;
3227
3228         lock_kernel();
3229         pcm_file = file->private_data;
3230         substream = pcm_file->substream;
3231         if (PCM_RUNTIME_CHECK(substream))
3232                 goto out;
3233         runtime = substream->runtime;
3234         err = fasync_helper(fd, file, on, &runtime->fasync);
3235 out:
3236         unlock_kernel();
3237         return err;
3238 }
3239
3240 /*
3241  * ioctl32 compat
3242  */
3243 #ifdef CONFIG_COMPAT
3244 #include "pcm_compat.c"
3245 #else
3246 #define snd_pcm_ioctl_compat    NULL
3247 #endif
3248
3249 /*
3250  *  To be removed helpers to keep binary compatibility
3251  */
3252
3253 #ifdef CONFIG_SND_SUPPORT_OLD_API
3254 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3255 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3256
3257 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3258                                                struct snd_pcm_hw_params_old *oparams)
3259 {
3260         unsigned int i;
3261
3262         memset(params, 0, sizeof(*params));
3263         params->flags = oparams->flags;
3264         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3265                 params->masks[i].bits[0] = oparams->masks[i];
3266         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3267         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3268         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3269         params->info = oparams->info;
3270         params->msbits = oparams->msbits;
3271         params->rate_num = oparams->rate_num;
3272         params->rate_den = oparams->rate_den;
3273         params->fifo_size = oparams->fifo_size;
3274 }
3275
3276 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3277                                              struct snd_pcm_hw_params *params)
3278 {
3279         unsigned int i;
3280
3281         memset(oparams, 0, sizeof(*oparams));
3282         oparams->flags = params->flags;
3283         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3284                 oparams->masks[i] = params->masks[i].bits[0];
3285         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3286         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3287         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3288         oparams->info = params->info;
3289         oparams->msbits = params->msbits;
3290         oparams->rate_num = params->rate_num;
3291         oparams->rate_den = params->rate_den;
3292         oparams->fifo_size = params->fifo_size;
3293 }
3294
3295 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3296                                       struct snd_pcm_hw_params_old __user * _oparams)
3297 {
3298         struct snd_pcm_hw_params *params;
3299         struct snd_pcm_hw_params_old *oparams = NULL;
3300         int err;
3301
3302         params = kmalloc(sizeof(*params), GFP_KERNEL);
3303         if (!params)
3304                 return -ENOMEM;
3305
3306         oparams = memdup_user(_oparams, sizeof(*oparams));
3307         if (IS_ERR(oparams)) {
3308                 err = PTR_ERR(oparams);
3309                 goto out;
3310         }
3311         snd_pcm_hw_convert_from_old_params(params, oparams);
3312         err = snd_pcm_hw_refine(substream, params);
3313         snd_pcm_hw_convert_to_old_params(oparams, params);
3314         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3315                 if (!err)
3316                         err = -EFAULT;
3317         }
3318
3319         kfree(oparams);
3320 out:
3321         kfree(params);
3322         return err;
3323 }
3324
3325 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3326                                       struct snd_pcm_hw_params_old __user * _oparams)
3327 {
3328         struct snd_pcm_hw_params *params;
3329         struct snd_pcm_hw_params_old *oparams = NULL;
3330         int err;
3331
3332         params = kmalloc(sizeof(*params), GFP_KERNEL);
3333         if (!params)
3334                 return -ENOMEM;
3335
3336         oparams = memdup_user(_oparams, sizeof(*oparams));
3337         if (IS_ERR(oparams)) {
3338                 err = PTR_ERR(oparams);
3339                 goto out;
3340         }
3341         snd_pcm_hw_convert_from_old_params(params, oparams);
3342         err = snd_pcm_hw_params(substream, params);
3343         snd_pcm_hw_convert_to_old_params(oparams, params);
3344         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3345                 if (!err)
3346                         err = -EFAULT;
3347         }
3348
3349         kfree(oparams);
3350 out:
3351         kfree(params);
3352         return err;
3353 }
3354 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3355
3356 #ifndef CONFIG_MMU
3357 unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
3358                                       unsigned long len, unsigned long pgoff,
3359                                       unsigned long flags)
3360 {
3361         return 0;
3362 }
3363 #else
3364 # define dummy_get_unmapped_area NULL
3365 #endif
3366
3367 /*
3368  *  Register section
3369  */
3370
3371 const struct file_operations snd_pcm_f_ops[2] = {
3372         {
3373                 .owner =                THIS_MODULE,
3374                 .write =                snd_pcm_write,
3375                 .aio_write =            snd_pcm_aio_write,
3376                 .open =                 snd_pcm_playback_open,
3377                 .release =              snd_pcm_release,
3378                 .poll =                 snd_pcm_playback_poll,
3379                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3380                 .compat_ioctl =         snd_pcm_ioctl_compat,
3381                 .mmap =                 snd_pcm_mmap,
3382                 .fasync =               snd_pcm_fasync,
3383                 .get_unmapped_area =    dummy_get_unmapped_area,
3384         },
3385         {
3386                 .owner =                THIS_MODULE,
3387                 .read =                 snd_pcm_read,
3388                 .aio_read =             snd_pcm_aio_read,
3389                 .open =                 snd_pcm_capture_open,
3390                 .release =              snd_pcm_release,
3391                 .poll =                 snd_pcm_capture_poll,
3392                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3393                 .compat_ioctl =         snd_pcm_ioctl_compat,
3394                 .mmap =                 snd_pcm_mmap,
3395                 .fasync =               snd_pcm_fasync,
3396                 .get_unmapped_area =    dummy_get_unmapped_area,
3397         }
3398 };