ALSA: pcm - Remove unneeded ifdef pgprot_noncached
[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 <linux/dma-mapping.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/info.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/timer.h>
36 #include <sound/minors.h>
37 #include <asm/io.h>
38
39 /*
40  *  Compatibility
41  */
42
43 struct snd_pcm_hw_params_old {
44         unsigned int flags;
45         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
46                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
47         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
48                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
49         unsigned int rmask;
50         unsigned int cmask;
51         unsigned int info;
52         unsigned int msbits;
53         unsigned int rate_num;
54         unsigned int rate_den;
55         snd_pcm_uframes_t fifo_size;
56         unsigned char reserved[64];
57 };
58
59 #ifdef CONFIG_SND_SUPPORT_OLD_API
60 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
61 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
62
63 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
64                                       struct snd_pcm_hw_params_old __user * _oparams);
65 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
66                                       struct snd_pcm_hw_params_old __user * _oparams);
67 #endif
68 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
69
70 /*
71  *
72  */
73
74 DEFINE_RWLOCK(snd_pcm_link_rwlock);
75 EXPORT_SYMBOL(snd_pcm_link_rwlock);
76
77 static DECLARE_RWSEM(snd_pcm_link_rwsem);
78
79 static inline mm_segment_t snd_enter_user(void)
80 {
81         mm_segment_t fs = get_fs();
82         set_fs(get_ds());
83         return fs;
84 }
85
86 static inline void snd_leave_user(mm_segment_t fs)
87 {
88         set_fs(fs);
89 }
90
91
92
93 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
94 {
95         struct snd_pcm_runtime *runtime;
96         struct snd_pcm *pcm = substream->pcm;
97         struct snd_pcm_str *pstr = substream->pstr;
98
99         memset(info, 0, sizeof(*info));
100         info->card = pcm->card->number;
101         info->device = pcm->device;
102         info->stream = substream->stream;
103         info->subdevice = substream->number;
104         strlcpy(info->id, pcm->id, sizeof(info->id));
105         strlcpy(info->name, pcm->name, sizeof(info->name));
106         info->dev_class = pcm->dev_class;
107         info->dev_subclass = pcm->dev_subclass;
108         info->subdevices_count = pstr->substream_count;
109         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
110         strlcpy(info->subname, substream->name, sizeof(info->subname));
111         runtime = substream->runtime;
112         /* AB: FIXME!!! This is definitely nonsense */
113         if (runtime) {
114                 info->sync = runtime->sync;
115                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
116         }
117         return 0;
118 }
119
120 int snd_pcm_info_user(struct snd_pcm_substream *substream,
121                       struct snd_pcm_info __user * _info)
122 {
123         struct snd_pcm_info *info;
124         int err;
125
126         info = kmalloc(sizeof(*info), GFP_KERNEL);
127         if (! info)
128                 return -ENOMEM;
129         err = snd_pcm_info(substream, info);
130         if (err >= 0) {
131                 if (copy_to_user(_info, info, sizeof(*info)))
132                         err = -EFAULT;
133         }
134         kfree(info);
135         return err;
136 }
137
138 #undef RULES_DEBUG
139
140 #ifdef RULES_DEBUG
141 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
142 char *snd_pcm_hw_param_names[] = {
143         HW_PARAM(ACCESS),
144         HW_PARAM(FORMAT),
145         HW_PARAM(SUBFORMAT),
146         HW_PARAM(SAMPLE_BITS),
147         HW_PARAM(FRAME_BITS),
148         HW_PARAM(CHANNELS),
149         HW_PARAM(RATE),
150         HW_PARAM(PERIOD_TIME),
151         HW_PARAM(PERIOD_SIZE),
152         HW_PARAM(PERIOD_BYTES),
153         HW_PARAM(PERIODS),
154         HW_PARAM(BUFFER_TIME),
155         HW_PARAM(BUFFER_SIZE),
156         HW_PARAM(BUFFER_BYTES),
157         HW_PARAM(TICK_TIME),
158 };
159 #endif
160
161 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 
162                       struct snd_pcm_hw_params *params)
163 {
164         unsigned int k;
165         struct snd_pcm_hardware *hw;
166         struct snd_interval *i = NULL;
167         struct snd_mask *m = NULL;
168         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
169         unsigned int rstamps[constrs->rules_num];
170         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
171         unsigned int stamp = 2;
172         int changed, again;
173
174         params->info = 0;
175         params->fifo_size = 0;
176         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
177                 params->msbits = 0;
178         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
179                 params->rate_num = 0;
180                 params->rate_den = 0;
181         }
182
183         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
184                 m = hw_param_mask(params, k);
185                 if (snd_mask_empty(m))
186                         return -EINVAL;
187                 if (!(params->rmask & (1 << k)))
188                         continue;
189 #ifdef RULES_DEBUG
190                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
191                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
192 #endif
193                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
194 #ifdef RULES_DEBUG
195                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
196 #endif
197                 if (changed)
198                         params->cmask |= 1 << k;
199                 if (changed < 0)
200                         return changed;
201         }
202
203         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
204                 i = hw_param_interval(params, k);
205                 if (snd_interval_empty(i))
206                         return -EINVAL;
207                 if (!(params->rmask & (1 << k)))
208                         continue;
209 #ifdef RULES_DEBUG
210                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
211                 if (i->empty)
212                         printk("empty");
213                 else
214                         printk("%c%u %u%c", 
215                                i->openmin ? '(' : '[', i->min,
216                                i->max, i->openmax ? ')' : ']');
217                 printk(" -> ");
218 #endif
219                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
220 #ifdef RULES_DEBUG
221                 if (i->empty)
222                         printk("empty\n");
223                 else 
224                         printk("%c%u %u%c\n", 
225                                i->openmin ? '(' : '[', i->min,
226                                i->max, i->openmax ? ')' : ']');
227 #endif
228                 if (changed)
229                         params->cmask |= 1 << k;
230                 if (changed < 0)
231                         return changed;
232         }
233
234         for (k = 0; k < constrs->rules_num; k++)
235                 rstamps[k] = 0;
236         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 
237                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
238         do {
239                 again = 0;
240                 for (k = 0; k < constrs->rules_num; k++) {
241                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
242                         unsigned int d;
243                         int doit = 0;
244                         if (r->cond && !(r->cond & params->flags))
245                                 continue;
246                         for (d = 0; r->deps[d] >= 0; d++) {
247                                 if (vstamps[r->deps[d]] > rstamps[k]) {
248                                         doit = 1;
249                                         break;
250                                 }
251                         }
252                         if (!doit)
253                                 continue;
254 #ifdef RULES_DEBUG
255                         printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
256                         if (r->var >= 0) {
257                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
258                                 if (hw_is_mask(r->var)) {
259                                         m = hw_param_mask(params, r->var);
260                                         printk("%x", *m->bits);
261                                 } else {
262                                         i = hw_param_interval(params, r->var);
263                                         if (i->empty)
264                                                 printk("empty");
265                                         else
266                                                 printk("%c%u %u%c", 
267                                                        i->openmin ? '(' : '[', i->min,
268                                                        i->max, i->openmax ? ')' : ']');
269                                 }
270                         }
271 #endif
272                         changed = r->func(params, r);
273 #ifdef RULES_DEBUG
274                         if (r->var >= 0) {
275                                 printk(" -> ");
276                                 if (hw_is_mask(r->var))
277                                         printk("%x", *m->bits);
278                                 else {
279                                         if (i->empty)
280                                                 printk("empty");
281                                         else
282                                                 printk("%c%u %u%c", 
283                                                        i->openmin ? '(' : '[', i->min,
284                                                        i->max, i->openmax ? ')' : ']');
285                                 }
286                         }
287                         printk("\n");
288 #endif
289                         rstamps[k] = stamp;
290                         if (changed && r->var >= 0) {
291                                 params->cmask |= (1 << r->var);
292                                 vstamps[r->var] = stamp;
293                                 again = 1;
294                         }
295                         if (changed < 0)
296                                 return changed;
297                         stamp++;
298                 }
299         } while (again);
300         if (!params->msbits) {
301                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
302                 if (snd_interval_single(i))
303                         params->msbits = snd_interval_value(i);
304         }
305
306         if (!params->rate_den) {
307                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
308                 if (snd_interval_single(i)) {
309                         params->rate_num = snd_interval_value(i);
310                         params->rate_den = 1;
311                 }
312         }
313
314         hw = &substream->runtime->hw;
315         if (!params->info)
316                 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
317         if (!params->fifo_size) {
318                 if (snd_mask_min(&params->masks[SNDRV_PCM_HW_PARAM_FORMAT]) ==
319                     snd_mask_max(&params->masks[SNDRV_PCM_HW_PARAM_FORMAT]) &&
320                     snd_mask_min(&params->masks[SNDRV_PCM_HW_PARAM_CHANNELS]) ==
321                     snd_mask_max(&params->masks[SNDRV_PCM_HW_PARAM_CHANNELS])) {
322                         changed = substream->ops->ioctl(substream,
323                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
324                         if (changed < 0)
325                                 return changed;
326                 }
327         }
328         params->rmask = 0;
329         return 0;
330 }
331
332 EXPORT_SYMBOL(snd_pcm_hw_refine);
333
334 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
335                                   struct snd_pcm_hw_params __user * _params)
336 {
337         struct snd_pcm_hw_params *params;
338         int err;
339
340         params = memdup_user(_params, sizeof(*params));
341         if (IS_ERR(params))
342                 return PTR_ERR(params);
343
344         err = snd_pcm_hw_refine(substream, params);
345         if (copy_to_user(_params, params, sizeof(*params))) {
346                 if (!err)
347                         err = -EFAULT;
348         }
349
350         kfree(params);
351         return err;
352 }
353
354 static int period_to_usecs(struct snd_pcm_runtime *runtime)
355 {
356         int usecs;
357
358         if (! runtime->rate)
359                 return -1; /* invalid */
360
361         /* take 75% of period time as the deadline */
362         usecs = (750000 / runtime->rate) * runtime->period_size;
363         usecs += ((750000 % runtime->rate) * runtime->period_size) /
364                 runtime->rate;
365
366         return usecs;
367 }
368
369 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
370                              struct snd_pcm_hw_params *params)
371 {
372         struct snd_pcm_runtime *runtime;
373         int err, usecs;
374         unsigned int bits;
375         snd_pcm_uframes_t frames;
376
377         if (PCM_RUNTIME_CHECK(substream))
378                 return -ENXIO;
379         runtime = substream->runtime;
380         snd_pcm_stream_lock_irq(substream);
381         switch (runtime->status->state) {
382         case SNDRV_PCM_STATE_OPEN:
383         case SNDRV_PCM_STATE_SETUP:
384         case SNDRV_PCM_STATE_PREPARED:
385                 break;
386         default:
387                 snd_pcm_stream_unlock_irq(substream);
388                 return -EBADFD;
389         }
390         snd_pcm_stream_unlock_irq(substream);
391 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
392         if (!substream->oss.oss)
393 #endif
394                 if (atomic_read(&substream->mmap_count))
395                         return -EBADFD;
396
397         params->rmask = ~0U;
398         err = snd_pcm_hw_refine(substream, params);
399         if (err < 0)
400                 goto _error;
401
402         err = snd_pcm_hw_params_choose(substream, params);
403         if (err < 0)
404                 goto _error;
405
406         if (substream->ops->hw_params != NULL) {
407                 err = substream->ops->hw_params(substream, params);
408                 if (err < 0)
409                         goto _error;
410         }
411
412         runtime->access = params_access(params);
413         runtime->format = params_format(params);
414         runtime->subformat = params_subformat(params);
415         runtime->channels = params_channels(params);
416         runtime->rate = params_rate(params);
417         runtime->period_size = params_period_size(params);
418         runtime->periods = params_periods(params);
419         runtime->buffer_size = params_buffer_size(params);
420         runtime->info = params->info;
421         runtime->rate_num = params->rate_num;
422         runtime->rate_den = params->rate_den;
423
424         bits = snd_pcm_format_physical_width(runtime->format);
425         runtime->sample_bits = bits;
426         bits *= runtime->channels;
427         runtime->frame_bits = bits;
428         frames = 1;
429         while (bits % 8 != 0) {
430                 bits *= 2;
431                 frames *= 2;
432         }
433         runtime->byte_align = bits / 8;
434         runtime->min_align = frames;
435
436         /* Default sw params */
437         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
438         runtime->period_step = 1;
439         runtime->control->avail_min = runtime->period_size;
440         runtime->start_threshold = 1;
441         runtime->stop_threshold = runtime->buffer_size;
442         runtime->silence_threshold = 0;
443         runtime->silence_size = 0;
444         runtime->boundary = runtime->buffer_size;
445         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
446                 runtime->boundary *= 2;
447
448         snd_pcm_timer_resolution_change(substream);
449         runtime->status->state = SNDRV_PCM_STATE_SETUP;
450
451         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
452                                 substream->latency_id);
453         if ((usecs = period_to_usecs(runtime)) >= 0)
454                 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
455                                         substream->latency_id, usecs);
456         return 0;
457  _error:
458         /* hardware might be unuseable from this time,
459            so we force application to retry to set
460            the correct hardware parameter settings */
461         runtime->status->state = SNDRV_PCM_STATE_OPEN;
462         if (substream->ops->hw_free != NULL)
463                 substream->ops->hw_free(substream);
464         return err;
465 }
466
467 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
468                                   struct snd_pcm_hw_params __user * _params)
469 {
470         struct snd_pcm_hw_params *params;
471         int err;
472
473         params = memdup_user(_params, sizeof(*params));
474         if (IS_ERR(params))
475                 return PTR_ERR(params);
476
477         err = snd_pcm_hw_params(substream, params);
478         if (copy_to_user(_params, params, sizeof(*params))) {
479                 if (!err)
480                         err = -EFAULT;
481         }
482
483         kfree(params);
484         return err;
485 }
486
487 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
488 {
489         struct snd_pcm_runtime *runtime;
490         int result = 0;
491
492         if (PCM_RUNTIME_CHECK(substream))
493                 return -ENXIO;
494         runtime = substream->runtime;
495         snd_pcm_stream_lock_irq(substream);
496         switch (runtime->status->state) {
497         case SNDRV_PCM_STATE_SETUP:
498         case SNDRV_PCM_STATE_PREPARED:
499                 break;
500         default:
501                 snd_pcm_stream_unlock_irq(substream);
502                 return -EBADFD;
503         }
504         snd_pcm_stream_unlock_irq(substream);
505         if (atomic_read(&substream->mmap_count))
506                 return -EBADFD;
507         if (substream->ops->hw_free)
508                 result = substream->ops->hw_free(substream);
509         runtime->status->state = SNDRV_PCM_STATE_OPEN;
510         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
511                 substream->latency_id);
512         return result;
513 }
514
515 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
516                              struct snd_pcm_sw_params *params)
517 {
518         struct snd_pcm_runtime *runtime;
519         int err;
520
521         if (PCM_RUNTIME_CHECK(substream))
522                 return -ENXIO;
523         runtime = substream->runtime;
524         snd_pcm_stream_lock_irq(substream);
525         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
526                 snd_pcm_stream_unlock_irq(substream);
527                 return -EBADFD;
528         }
529         snd_pcm_stream_unlock_irq(substream);
530
531         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
532                 return -EINVAL;
533         if (params->avail_min == 0)
534                 return -EINVAL;
535         if (params->silence_size >= runtime->boundary) {
536                 if (params->silence_threshold != 0)
537                         return -EINVAL;
538         } else {
539                 if (params->silence_size > params->silence_threshold)
540                         return -EINVAL;
541                 if (params->silence_threshold > runtime->buffer_size)
542                         return -EINVAL;
543         }
544         err = 0;
545         snd_pcm_stream_lock_irq(substream);
546         runtime->tstamp_mode = params->tstamp_mode;
547         runtime->period_step = params->period_step;
548         runtime->control->avail_min = params->avail_min;
549         runtime->start_threshold = params->start_threshold;
550         runtime->stop_threshold = params->stop_threshold;
551         runtime->silence_threshold = params->silence_threshold;
552         runtime->silence_size = params->silence_size;
553         params->boundary = runtime->boundary;
554         if (snd_pcm_running(substream)) {
555                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
556                     runtime->silence_size > 0)
557                         snd_pcm_playback_silence(substream, ULONG_MAX);
558                 err = snd_pcm_update_state(substream, runtime);
559         }
560         snd_pcm_stream_unlock_irq(substream);
561         return err;
562 }
563
564 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
565                                   struct snd_pcm_sw_params __user * _params)
566 {
567         struct snd_pcm_sw_params params;
568         int err;
569         if (copy_from_user(&params, _params, sizeof(params)))
570                 return -EFAULT;
571         err = snd_pcm_sw_params(substream, &params);
572         if (copy_to_user(_params, &params, sizeof(params)))
573                 return -EFAULT;
574         return err;
575 }
576
577 int snd_pcm_status(struct snd_pcm_substream *substream,
578                    struct snd_pcm_status *status)
579 {
580         struct snd_pcm_runtime *runtime = substream->runtime;
581
582         snd_pcm_stream_lock_irq(substream);
583         status->state = runtime->status->state;
584         status->suspended_state = runtime->status->suspended_state;
585         if (status->state == SNDRV_PCM_STATE_OPEN)
586                 goto _end;
587         status->trigger_tstamp = runtime->trigger_tstamp;
588         if (snd_pcm_running(substream)) {
589                 snd_pcm_update_hw_ptr(substream);
590                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
591                         status->tstamp = runtime->status->tstamp;
592                         goto _tstamp_end;
593                 }
594         }
595         snd_pcm_gettime(runtime, &status->tstamp);
596  _tstamp_end:
597         status->appl_ptr = runtime->control->appl_ptr;
598         status->hw_ptr = runtime->status->hw_ptr;
599         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
600                 status->avail = snd_pcm_playback_avail(runtime);
601                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
602                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
603                         status->delay = runtime->buffer_size - status->avail;
604                         status->delay += runtime->delay;
605                 } else
606                         status->delay = 0;
607         } else {
608                 status->avail = snd_pcm_capture_avail(runtime);
609                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
610                         status->delay = status->avail + runtime->delay;
611                 else
612                         status->delay = 0;
613         }
614         status->avail_max = runtime->avail_max;
615         status->overrange = runtime->overrange;
616         runtime->avail_max = 0;
617         runtime->overrange = 0;
618  _end:
619         snd_pcm_stream_unlock_irq(substream);
620         return 0;
621 }
622
623 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
624                                struct snd_pcm_status __user * _status)
625 {
626         struct snd_pcm_status status;
627         int res;
628         
629         memset(&status, 0, sizeof(status));
630         res = snd_pcm_status(substream, &status);
631         if (res < 0)
632                 return res;
633         if (copy_to_user(_status, &status, sizeof(status)))
634                 return -EFAULT;
635         return 0;
636 }
637
638 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
639                                 struct snd_pcm_channel_info * info)
640 {
641         struct snd_pcm_runtime *runtime;
642         unsigned int channel;
643         
644         channel = info->channel;
645         runtime = substream->runtime;
646         snd_pcm_stream_lock_irq(substream);
647         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
648                 snd_pcm_stream_unlock_irq(substream);
649                 return -EBADFD;
650         }
651         snd_pcm_stream_unlock_irq(substream);
652         if (channel >= runtime->channels)
653                 return -EINVAL;
654         memset(info, 0, sizeof(*info));
655         info->channel = channel;
656         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
657 }
658
659 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
660                                      struct snd_pcm_channel_info __user * _info)
661 {
662         struct snd_pcm_channel_info info;
663         int res;
664         
665         if (copy_from_user(&info, _info, sizeof(info)))
666                 return -EFAULT;
667         res = snd_pcm_channel_info(substream, &info);
668         if (res < 0)
669                 return res;
670         if (copy_to_user(_info, &info, sizeof(info)))
671                 return -EFAULT;
672         return 0;
673 }
674
675 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
676 {
677         struct snd_pcm_runtime *runtime = substream->runtime;
678         if (runtime->trigger_master == NULL)
679                 return;
680         if (runtime->trigger_master == substream) {
681                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
682         } else {
683                 snd_pcm_trigger_tstamp(runtime->trigger_master);
684                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
685         }
686         runtime->trigger_master = NULL;
687 }
688
689 struct action_ops {
690         int (*pre_action)(struct snd_pcm_substream *substream, int state);
691         int (*do_action)(struct snd_pcm_substream *substream, int state);
692         void (*undo_action)(struct snd_pcm_substream *substream, int state);
693         void (*post_action)(struct snd_pcm_substream *substream, int state);
694 };
695
696 /*
697  *  this functions is core for handling of linked stream
698  *  Note: the stream state might be changed also on failure
699  *  Note2: call with calling stream lock + link lock
700  */
701 static int snd_pcm_action_group(struct action_ops *ops,
702                                 struct snd_pcm_substream *substream,
703                                 int state, int do_lock)
704 {
705         struct snd_pcm_substream *s = NULL;
706         struct snd_pcm_substream *s1;
707         int res = 0;
708
709         snd_pcm_group_for_each_entry(s, substream) {
710                 if (do_lock && s != substream)
711                         spin_lock_nested(&s->self_group.lock,
712                                          SINGLE_DEPTH_NESTING);
713                 res = ops->pre_action(s, state);
714                 if (res < 0)
715                         goto _unlock;
716         }
717         snd_pcm_group_for_each_entry(s, substream) {
718                 res = ops->do_action(s, state);
719                 if (res < 0) {
720                         if (ops->undo_action) {
721                                 snd_pcm_group_for_each_entry(s1, substream) {
722                                         if (s1 == s) /* failed stream */
723                                                 break;
724                                         ops->undo_action(s1, state);
725                                 }
726                         }
727                         s = NULL; /* unlock all */
728                         goto _unlock;
729                 }
730         }
731         snd_pcm_group_for_each_entry(s, substream) {
732                 ops->post_action(s, state);
733         }
734  _unlock:
735         if (do_lock) {
736                 /* unlock streams */
737                 snd_pcm_group_for_each_entry(s1, substream) {
738                         if (s1 != substream)
739                                 spin_unlock(&s1->self_group.lock);
740                         if (s1 == s)    /* end */
741                                 break;
742                 }
743         }
744         return res;
745 }
746
747 /*
748  *  Note: call with stream lock
749  */
750 static int snd_pcm_action_single(struct action_ops *ops,
751                                  struct snd_pcm_substream *substream,
752                                  int state)
753 {
754         int res;
755         
756         res = ops->pre_action(substream, state);
757         if (res < 0)
758                 return res;
759         res = ops->do_action(substream, state);
760         if (res == 0)
761                 ops->post_action(substream, state);
762         else if (ops->undo_action)
763                 ops->undo_action(substream, state);
764         return res;
765 }
766
767 /*
768  *  Note: call with stream lock
769  */
770 static int snd_pcm_action(struct action_ops *ops,
771                           struct snd_pcm_substream *substream,
772                           int state)
773 {
774         int res;
775
776         if (snd_pcm_stream_linked(substream)) {
777                 if (!spin_trylock(&substream->group->lock)) {
778                         spin_unlock(&substream->self_group.lock);
779                         spin_lock(&substream->group->lock);
780                         spin_lock(&substream->self_group.lock);
781                 }
782                 res = snd_pcm_action_group(ops, substream, state, 1);
783                 spin_unlock(&substream->group->lock);
784         } else {
785                 res = snd_pcm_action_single(ops, substream, state);
786         }
787         return res;
788 }
789
790 /*
791  *  Note: don't use any locks before
792  */
793 static int snd_pcm_action_lock_irq(struct action_ops *ops,
794                                    struct snd_pcm_substream *substream,
795                                    int state)
796 {
797         int res;
798
799         read_lock_irq(&snd_pcm_link_rwlock);
800         if (snd_pcm_stream_linked(substream)) {
801                 spin_lock(&substream->group->lock);
802                 spin_lock(&substream->self_group.lock);
803                 res = snd_pcm_action_group(ops, substream, state, 1);
804                 spin_unlock(&substream->self_group.lock);
805                 spin_unlock(&substream->group->lock);
806         } else {
807                 spin_lock(&substream->self_group.lock);
808                 res = snd_pcm_action_single(ops, substream, state);
809                 spin_unlock(&substream->self_group.lock);
810         }
811         read_unlock_irq(&snd_pcm_link_rwlock);
812         return res;
813 }
814
815 /*
816  */
817 static int snd_pcm_action_nonatomic(struct action_ops *ops,
818                                     struct snd_pcm_substream *substream,
819                                     int state)
820 {
821         int res;
822
823         down_read(&snd_pcm_link_rwsem);
824         if (snd_pcm_stream_linked(substream))
825                 res = snd_pcm_action_group(ops, substream, state, 0);
826         else
827                 res = snd_pcm_action_single(ops, substream, state);
828         up_read(&snd_pcm_link_rwsem);
829         return res;
830 }
831
832 /*
833  * start callbacks
834  */
835 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
836 {
837         struct snd_pcm_runtime *runtime = substream->runtime;
838         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
839                 return -EBADFD;
840         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
841             !snd_pcm_playback_data(substream))
842                 return -EPIPE;
843         runtime->trigger_master = substream;
844         return 0;
845 }
846
847 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
848 {
849         if (substream->runtime->trigger_master != substream)
850                 return 0;
851         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
852 }
853
854 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
855 {
856         if (substream->runtime->trigger_master == substream)
857                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
858 }
859
860 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
861 {
862         struct snd_pcm_runtime *runtime = substream->runtime;
863         snd_pcm_trigger_tstamp(substream);
864         runtime->hw_ptr_jiffies = jiffies;
865         runtime->status->state = state;
866         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
867             runtime->silence_size > 0)
868                 snd_pcm_playback_silence(substream, ULONG_MAX);
869         if (substream->timer)
870                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
871                                  &runtime->trigger_tstamp);
872 }
873
874 static struct action_ops snd_pcm_action_start = {
875         .pre_action = snd_pcm_pre_start,
876         .do_action = snd_pcm_do_start,
877         .undo_action = snd_pcm_undo_start,
878         .post_action = snd_pcm_post_start
879 };
880
881 /**
882  * snd_pcm_start - start all linked streams
883  * @substream: the PCM substream instance
884  */
885 int snd_pcm_start(struct snd_pcm_substream *substream)
886 {
887         return snd_pcm_action(&snd_pcm_action_start, substream,
888                               SNDRV_PCM_STATE_RUNNING);
889 }
890
891 /*
892  * stop callbacks
893  */
894 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
895 {
896         struct snd_pcm_runtime *runtime = substream->runtime;
897         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
898                 return -EBADFD;
899         runtime->trigger_master = substream;
900         return 0;
901 }
902
903 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
904 {
905         if (substream->runtime->trigger_master == substream &&
906             snd_pcm_running(substream))
907                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
908         return 0; /* unconditonally stop all substreams */
909 }
910
911 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
912 {
913         struct snd_pcm_runtime *runtime = substream->runtime;
914         if (runtime->status->state != state) {
915                 snd_pcm_trigger_tstamp(substream);
916                 if (substream->timer)
917                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
918                                          &runtime->trigger_tstamp);
919                 runtime->status->state = state;
920         }
921         wake_up(&runtime->sleep);
922 }
923
924 static struct action_ops snd_pcm_action_stop = {
925         .pre_action = snd_pcm_pre_stop,
926         .do_action = snd_pcm_do_stop,
927         .post_action = snd_pcm_post_stop
928 };
929
930 /**
931  * snd_pcm_stop - try to stop all running streams in the substream group
932  * @substream: the PCM substream instance
933  * @state: PCM state after stopping the stream
934  *
935  * The state of each stream is then changed to the given state unconditionally.
936  */
937 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
938 {
939         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
940 }
941
942 EXPORT_SYMBOL(snd_pcm_stop);
943
944 /**
945  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
946  * @substream: the PCM substream
947  *
948  * After stopping, the state is changed to SETUP.
949  * Unlike snd_pcm_stop(), this affects only the given stream.
950  */
951 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
952 {
953         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
954                                      SNDRV_PCM_STATE_SETUP);
955 }
956
957 /*
958  * pause callbacks
959  */
960 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
961 {
962         struct snd_pcm_runtime *runtime = substream->runtime;
963         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
964                 return -ENOSYS;
965         if (push) {
966                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
967                         return -EBADFD;
968         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
969                 return -EBADFD;
970         runtime->trigger_master = substream;
971         return 0;
972 }
973
974 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
975 {
976         if (substream->runtime->trigger_master != substream)
977                 return 0;
978         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
979          * a delta betwen the current jiffies, this gives a large enough
980          * delta, effectively to skip the check once.
981          */
982         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
983         return substream->ops->trigger(substream,
984                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
985                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
986 }
987
988 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
989 {
990         if (substream->runtime->trigger_master == substream)
991                 substream->ops->trigger(substream,
992                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
993                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
994 }
995
996 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
997 {
998         struct snd_pcm_runtime *runtime = substream->runtime;
999         snd_pcm_trigger_tstamp(substream);
1000         if (push) {
1001                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1002                 if (substream->timer)
1003                         snd_timer_notify(substream->timer,
1004                                          SNDRV_TIMER_EVENT_MPAUSE,
1005                                          &runtime->trigger_tstamp);
1006                 wake_up(&runtime->sleep);
1007         } else {
1008                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1009                 if (substream->timer)
1010                         snd_timer_notify(substream->timer,
1011                                          SNDRV_TIMER_EVENT_MCONTINUE,
1012                                          &runtime->trigger_tstamp);
1013         }
1014 }
1015
1016 static struct action_ops snd_pcm_action_pause = {
1017         .pre_action = snd_pcm_pre_pause,
1018         .do_action = snd_pcm_do_pause,
1019         .undo_action = snd_pcm_undo_pause,
1020         .post_action = snd_pcm_post_pause
1021 };
1022
1023 /*
1024  * Push/release the pause for all linked streams.
1025  */
1026 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1027 {
1028         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1029 }
1030
1031 #ifdef CONFIG_PM
1032 /* suspend */
1033
1034 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1035 {
1036         struct snd_pcm_runtime *runtime = substream->runtime;
1037         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1038                 return -EBUSY;
1039         runtime->trigger_master = substream;
1040         return 0;
1041 }
1042
1043 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1044 {
1045         struct snd_pcm_runtime *runtime = substream->runtime;
1046         if (runtime->trigger_master != substream)
1047                 return 0;
1048         if (! snd_pcm_running(substream))
1049                 return 0;
1050         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1051         return 0; /* suspend unconditionally */
1052 }
1053
1054 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1055 {
1056         struct snd_pcm_runtime *runtime = substream->runtime;
1057         snd_pcm_trigger_tstamp(substream);
1058         if (substream->timer)
1059                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1060                                  &runtime->trigger_tstamp);
1061         runtime->status->suspended_state = runtime->status->state;
1062         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1063         wake_up(&runtime->sleep);
1064 }
1065
1066 static struct action_ops snd_pcm_action_suspend = {
1067         .pre_action = snd_pcm_pre_suspend,
1068         .do_action = snd_pcm_do_suspend,
1069         .post_action = snd_pcm_post_suspend
1070 };
1071
1072 /**
1073  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1074  * @substream: the PCM substream
1075  *
1076  * After this call, all streams are changed to SUSPENDED state.
1077  */
1078 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1079 {
1080         int err;
1081         unsigned long flags;
1082
1083         if (! substream)
1084                 return 0;
1085
1086         snd_pcm_stream_lock_irqsave(substream, flags);
1087         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1088         snd_pcm_stream_unlock_irqrestore(substream, flags);
1089         return err;
1090 }
1091
1092 EXPORT_SYMBOL(snd_pcm_suspend);
1093
1094 /**
1095  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1096  * @pcm: the PCM instance
1097  *
1098  * After this call, all streams are changed to SUSPENDED state.
1099  */
1100 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1101 {
1102         struct snd_pcm_substream *substream;
1103         int stream, err = 0;
1104
1105         if (! pcm)
1106                 return 0;
1107
1108         for (stream = 0; stream < 2; stream++) {
1109                 for (substream = pcm->streams[stream].substream;
1110                      substream; substream = substream->next) {
1111                         /* FIXME: the open/close code should lock this as well */
1112                         if (substream->runtime == NULL)
1113                                 continue;
1114                         err = snd_pcm_suspend(substream);
1115                         if (err < 0 && err != -EBUSY)
1116                                 return err;
1117                 }
1118         }
1119         return 0;
1120 }
1121
1122 EXPORT_SYMBOL(snd_pcm_suspend_all);
1123
1124 /* resume */
1125
1126 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1127 {
1128         struct snd_pcm_runtime *runtime = substream->runtime;
1129         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1130                 return -ENOSYS;
1131         runtime->trigger_master = substream;
1132         return 0;
1133 }
1134
1135 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1136 {
1137         struct snd_pcm_runtime *runtime = substream->runtime;
1138         if (runtime->trigger_master != substream)
1139                 return 0;
1140         /* DMA not running previously? */
1141         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1142             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1143              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1144                 return 0;
1145         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1146 }
1147
1148 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1149 {
1150         if (substream->runtime->trigger_master == substream &&
1151             snd_pcm_running(substream))
1152                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1153 }
1154
1155 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1156 {
1157         struct snd_pcm_runtime *runtime = substream->runtime;
1158         snd_pcm_trigger_tstamp(substream);
1159         if (substream->timer)
1160                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1161                                  &runtime->trigger_tstamp);
1162         runtime->status->state = runtime->status->suspended_state;
1163 }
1164
1165 static struct action_ops snd_pcm_action_resume = {
1166         .pre_action = snd_pcm_pre_resume,
1167         .do_action = snd_pcm_do_resume,
1168         .undo_action = snd_pcm_undo_resume,
1169         .post_action = snd_pcm_post_resume
1170 };
1171
1172 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1173 {
1174         struct snd_card *card = substream->pcm->card;
1175         int res;
1176
1177         snd_power_lock(card);
1178         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1179                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1180         snd_power_unlock(card);
1181         return res;
1182 }
1183
1184 #else
1185
1186 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1187 {
1188         return -ENOSYS;
1189 }
1190
1191 #endif /* CONFIG_PM */
1192
1193 /*
1194  * xrun ioctl
1195  *
1196  * Change the RUNNING stream(s) to XRUN state.
1197  */
1198 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1199 {
1200         struct snd_card *card = substream->pcm->card;
1201         struct snd_pcm_runtime *runtime = substream->runtime;
1202         int result;
1203
1204         snd_power_lock(card);
1205         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1206                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1207                 if (result < 0)
1208                         goto _unlock;
1209         }
1210
1211         snd_pcm_stream_lock_irq(substream);
1212         switch (runtime->status->state) {
1213         case SNDRV_PCM_STATE_XRUN:
1214                 result = 0;     /* already there */
1215                 break;
1216         case SNDRV_PCM_STATE_RUNNING:
1217                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1218                 break;
1219         default:
1220                 result = -EBADFD;
1221         }
1222         snd_pcm_stream_unlock_irq(substream);
1223  _unlock:
1224         snd_power_unlock(card);
1225         return result;
1226 }
1227
1228 /*
1229  * reset ioctl
1230  */
1231 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1232 {
1233         struct snd_pcm_runtime *runtime = substream->runtime;
1234         switch (runtime->status->state) {
1235         case SNDRV_PCM_STATE_RUNNING:
1236         case SNDRV_PCM_STATE_PREPARED:
1237         case SNDRV_PCM_STATE_PAUSED:
1238         case SNDRV_PCM_STATE_SUSPENDED:
1239                 return 0;
1240         default:
1241                 return -EBADFD;
1242         }
1243 }
1244
1245 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1246 {
1247         struct snd_pcm_runtime *runtime = substream->runtime;
1248         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1249         if (err < 0)
1250                 return err;
1251         runtime->hw_ptr_base = 0;
1252         runtime->silence_start = runtime->status->hw_ptr;
1253         runtime->silence_filled = 0;
1254         return 0;
1255 }
1256
1257 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1258 {
1259         struct snd_pcm_runtime *runtime = substream->runtime;
1260         runtime->control->appl_ptr = runtime->status->hw_ptr;
1261         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1262             runtime->silence_size > 0)
1263                 snd_pcm_playback_silence(substream, ULONG_MAX);
1264 }
1265
1266 static struct action_ops snd_pcm_action_reset = {
1267         .pre_action = snd_pcm_pre_reset,
1268         .do_action = snd_pcm_do_reset,
1269         .post_action = snd_pcm_post_reset
1270 };
1271
1272 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1273 {
1274         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1275 }
1276
1277 /*
1278  * prepare ioctl
1279  */
1280 /* we use the second argument for updating f_flags */
1281 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1282                                int f_flags)
1283 {
1284         struct snd_pcm_runtime *runtime = substream->runtime;
1285         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1286             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1287                 return -EBADFD;
1288         if (snd_pcm_running(substream))
1289                 return -EBUSY;
1290         substream->f_flags = f_flags;
1291         return 0;
1292 }
1293
1294 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1295 {
1296         int err;
1297         err = substream->ops->prepare(substream);
1298         if (err < 0)
1299                 return err;
1300         return snd_pcm_do_reset(substream, 0);
1301 }
1302
1303 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1304 {
1305         struct snd_pcm_runtime *runtime = substream->runtime;
1306         runtime->control->appl_ptr = runtime->status->hw_ptr;
1307         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1308 }
1309
1310 static struct action_ops snd_pcm_action_prepare = {
1311         .pre_action = snd_pcm_pre_prepare,
1312         .do_action = snd_pcm_do_prepare,
1313         .post_action = snd_pcm_post_prepare
1314 };
1315
1316 /**
1317  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1318  * @substream: the PCM substream instance
1319  * @file: file to refer f_flags
1320  */
1321 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1322                            struct file *file)
1323 {
1324         int res;
1325         struct snd_card *card = substream->pcm->card;
1326         int f_flags;
1327
1328         if (file)
1329                 f_flags = file->f_flags;
1330         else
1331                 f_flags = substream->f_flags;
1332
1333         snd_power_lock(card);
1334         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1335                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1336                                                substream, f_flags);
1337         snd_power_unlock(card);
1338         return res;
1339 }
1340
1341 /*
1342  * drain ioctl
1343  */
1344
1345 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1346 {
1347         substream->runtime->trigger_master = substream;
1348         return 0;
1349 }
1350
1351 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1352 {
1353         struct snd_pcm_runtime *runtime = substream->runtime;
1354         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1355                 switch (runtime->status->state) {
1356                 case SNDRV_PCM_STATE_PREPARED:
1357                         /* start playback stream if possible */
1358                         if (! snd_pcm_playback_empty(substream)) {
1359                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1360                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1361                         }
1362                         break;
1363                 case SNDRV_PCM_STATE_RUNNING:
1364                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1365                         break;
1366                 default:
1367                         break;
1368                 }
1369         } else {
1370                 /* stop running stream */
1371                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1372                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1373                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1374                         snd_pcm_do_stop(substream, new_state);
1375                         snd_pcm_post_stop(substream, new_state);
1376                 }
1377         }
1378         return 0;
1379 }
1380
1381 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1382 {
1383 }
1384
1385 static struct action_ops snd_pcm_action_drain_init = {
1386         .pre_action = snd_pcm_pre_drain_init,
1387         .do_action = snd_pcm_do_drain_init,
1388         .post_action = snd_pcm_post_drain_init
1389 };
1390
1391 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1392
1393 /*
1394  * Drain the stream(s).
1395  * When the substream is linked, sync until the draining of all playback streams
1396  * is finished.
1397  * After this call, all streams are supposed to be either SETUP or DRAINING
1398  * (capture only) state.
1399  */
1400 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1401                          struct file *file)
1402 {
1403         struct snd_card *card;
1404         struct snd_pcm_runtime *runtime;
1405         struct snd_pcm_substream *s;
1406         wait_queue_t wait;
1407         int result = 0;
1408         int nonblock = 0;
1409
1410         card = substream->pcm->card;
1411         runtime = substream->runtime;
1412
1413         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1414                 return -EBADFD;
1415
1416         snd_power_lock(card);
1417         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1418                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1419                 if (result < 0) {
1420                         snd_power_unlock(card);
1421                         return result;
1422                 }
1423         }
1424
1425         if (file) {
1426                 if (file->f_flags & O_NONBLOCK)
1427                         nonblock = 1;
1428         } else if (substream->f_flags & O_NONBLOCK)
1429                 nonblock = 1;
1430
1431         down_read(&snd_pcm_link_rwsem);
1432         snd_pcm_stream_lock_irq(substream);
1433         /* resume pause */
1434         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1435                 snd_pcm_pause(substream, 0);
1436
1437         /* pre-start/stop - all running streams are changed to DRAINING state */
1438         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1439         if (result < 0)
1440                 goto unlock;
1441         /* in non-blocking, we don't wait in ioctl but let caller poll */
1442         if (nonblock) {
1443                 result = -EAGAIN;
1444                 goto unlock;
1445         }
1446
1447         for (;;) {
1448                 long tout;
1449                 struct snd_pcm_runtime *to_check;
1450                 if (signal_pending(current)) {
1451                         result = -ERESTARTSYS;
1452                         break;
1453                 }
1454                 /* find a substream to drain */
1455                 to_check = NULL;
1456                 snd_pcm_group_for_each_entry(s, substream) {
1457                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1458                                 continue;
1459                         runtime = s->runtime;
1460                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1461                                 to_check = runtime;
1462                                 break;
1463                         }
1464                 }
1465                 if (!to_check)
1466                         break; /* all drained */
1467                 init_waitqueue_entry(&wait, current);
1468                 add_wait_queue(&to_check->sleep, &wait);
1469                 set_current_state(TASK_INTERRUPTIBLE);
1470                 snd_pcm_stream_unlock_irq(substream);
1471                 up_read(&snd_pcm_link_rwsem);
1472                 snd_power_unlock(card);
1473                 tout = schedule_timeout(10 * HZ);
1474                 snd_power_lock(card);
1475                 down_read(&snd_pcm_link_rwsem);
1476                 snd_pcm_stream_lock_irq(substream);
1477                 remove_wait_queue(&to_check->sleep, &wait);
1478                 if (tout == 0) {
1479                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1480                                 result = -ESTRPIPE;
1481                         else {
1482                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1483                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1484                                 result = -EIO;
1485                         }
1486                         break;
1487                 }
1488         }
1489
1490  unlock:
1491         snd_pcm_stream_unlock_irq(substream);
1492         up_read(&snd_pcm_link_rwsem);
1493         snd_power_unlock(card);
1494
1495         return result;
1496 }
1497
1498 /*
1499  * drop ioctl
1500  *
1501  * Immediately put all linked substreams into SETUP state.
1502  */
1503 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1504 {
1505         struct snd_pcm_runtime *runtime;
1506         struct snd_card *card;
1507         int result = 0;
1508         
1509         if (PCM_RUNTIME_CHECK(substream))
1510                 return -ENXIO;
1511         runtime = substream->runtime;
1512         card = substream->pcm->card;
1513
1514         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1515             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1516             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1517                 return -EBADFD;
1518
1519         snd_pcm_stream_lock_irq(substream);
1520         /* resume pause */
1521         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1522                 snd_pcm_pause(substream, 0);
1523
1524         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1525         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1526         snd_pcm_stream_unlock_irq(substream);
1527
1528         return result;
1529 }
1530
1531
1532 /* WARNING: Don't forget to fput back the file */
1533 static struct file *snd_pcm_file_fd(int fd)
1534 {
1535         struct file *file;
1536         struct inode *inode;
1537         unsigned int minor;
1538
1539         file = fget(fd);
1540         if (!file)
1541                 return NULL;
1542         inode = file->f_path.dentry->d_inode;
1543         if (!S_ISCHR(inode->i_mode) ||
1544             imajor(inode) != snd_major) {
1545                 fput(file);
1546                 return NULL;
1547         }
1548         minor = iminor(inode);
1549         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1550             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1551                 fput(file);
1552                 return NULL;
1553         }
1554         return file;
1555 }
1556
1557 /*
1558  * PCM link handling
1559  */
1560 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1561 {
1562         int res = 0;
1563         struct file *file;
1564         struct snd_pcm_file *pcm_file;
1565         struct snd_pcm_substream *substream1;
1566
1567         file = snd_pcm_file_fd(fd);
1568         if (!file)
1569                 return -EBADFD;
1570         pcm_file = file->private_data;
1571         substream1 = pcm_file->substream;
1572         down_write(&snd_pcm_link_rwsem);
1573         write_lock_irq(&snd_pcm_link_rwlock);
1574         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1575             substream->runtime->status->state != substream1->runtime->status->state) {
1576                 res = -EBADFD;
1577                 goto _end;
1578         }
1579         if (snd_pcm_stream_linked(substream1)) {
1580                 res = -EALREADY;
1581                 goto _end;
1582         }
1583         if (!snd_pcm_stream_linked(substream)) {
1584                 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1585                 if (substream->group == NULL) {
1586                         res = -ENOMEM;
1587                         goto _end;
1588                 }
1589                 spin_lock_init(&substream->group->lock);
1590                 INIT_LIST_HEAD(&substream->group->substreams);
1591                 list_add_tail(&substream->link_list, &substream->group->substreams);
1592                 substream->group->count = 1;
1593         }
1594         list_add_tail(&substream1->link_list, &substream->group->substreams);
1595         substream->group->count++;
1596         substream1->group = substream->group;
1597  _end:
1598         write_unlock_irq(&snd_pcm_link_rwlock);
1599         up_write(&snd_pcm_link_rwsem);
1600         fput(file);
1601         return res;
1602 }
1603
1604 static void relink_to_local(struct snd_pcm_substream *substream)
1605 {
1606         substream->group = &substream->self_group;
1607         INIT_LIST_HEAD(&substream->self_group.substreams);
1608         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1609 }
1610
1611 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1612 {
1613         struct snd_pcm_substream *s;
1614         int res = 0;
1615
1616         down_write(&snd_pcm_link_rwsem);
1617         write_lock_irq(&snd_pcm_link_rwlock);
1618         if (!snd_pcm_stream_linked(substream)) {
1619                 res = -EALREADY;
1620                 goto _end;
1621         }
1622         list_del(&substream->link_list);
1623         substream->group->count--;
1624         if (substream->group->count == 1) {     /* detach the last stream, too */
1625                 snd_pcm_group_for_each_entry(s, substream) {
1626                         relink_to_local(s);
1627                         break;
1628                 }
1629                 kfree(substream->group);
1630         }
1631         relink_to_local(substream);
1632        _end:
1633         write_unlock_irq(&snd_pcm_link_rwlock);
1634         up_write(&snd_pcm_link_rwsem);
1635         return res;
1636 }
1637
1638 /*
1639  * hw configurator
1640  */
1641 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1642                                struct snd_pcm_hw_rule *rule)
1643 {
1644         struct snd_interval t;
1645         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1646                      hw_param_interval_c(params, rule->deps[1]), &t);
1647         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1648 }
1649
1650 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1651                                struct snd_pcm_hw_rule *rule)
1652 {
1653         struct snd_interval t;
1654         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1655                      hw_param_interval_c(params, rule->deps[1]), &t);
1656         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1657 }
1658
1659 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1660                                    struct snd_pcm_hw_rule *rule)
1661 {
1662         struct snd_interval t;
1663         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1664                          hw_param_interval_c(params, rule->deps[1]),
1665                          (unsigned long) rule->private, &t);
1666         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1667 }
1668
1669 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1670                                    struct snd_pcm_hw_rule *rule)
1671 {
1672         struct snd_interval t;
1673         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1674                          (unsigned long) rule->private,
1675                          hw_param_interval_c(params, rule->deps[1]), &t);
1676         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1677 }
1678
1679 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1680                                   struct snd_pcm_hw_rule *rule)
1681 {
1682         unsigned int k;
1683         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1684         struct snd_mask m;
1685         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1686         snd_mask_any(&m);
1687         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1688                 int bits;
1689                 if (! snd_mask_test(mask, k))
1690                         continue;
1691                 bits = snd_pcm_format_physical_width(k);
1692                 if (bits <= 0)
1693                         continue; /* ignore invalid formats */
1694                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1695                         snd_mask_reset(&m, k);
1696         }
1697         return snd_mask_refine(mask, &m);
1698 }
1699
1700 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1701                                        struct snd_pcm_hw_rule *rule)
1702 {
1703         struct snd_interval t;
1704         unsigned int k;
1705         t.min = UINT_MAX;
1706         t.max = 0;
1707         t.openmin = 0;
1708         t.openmax = 0;
1709         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1710                 int bits;
1711                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1712                         continue;
1713                 bits = snd_pcm_format_physical_width(k);
1714                 if (bits <= 0)
1715                         continue; /* ignore invalid formats */
1716                 if (t.min > (unsigned)bits)
1717                         t.min = bits;
1718                 if (t.max < (unsigned)bits)
1719                         t.max = bits;
1720         }
1721         t.integer = 1;
1722         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1723 }
1724
1725 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1726 #error "Change this table"
1727 #endif
1728
1729 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1730                                  48000, 64000, 88200, 96000, 176400, 192000 };
1731
1732 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1733         .count = ARRAY_SIZE(rates),
1734         .list = rates,
1735 };
1736
1737 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1738                                 struct snd_pcm_hw_rule *rule)
1739 {
1740         struct snd_pcm_hardware *hw = rule->private;
1741         return snd_interval_list(hw_param_interval(params, rule->var),
1742                                  snd_pcm_known_rates.count,
1743                                  snd_pcm_known_rates.list, hw->rates);
1744 }               
1745
1746 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1747                                             struct snd_pcm_hw_rule *rule)
1748 {
1749         struct snd_interval t;
1750         struct snd_pcm_substream *substream = rule->private;
1751         t.min = 0;
1752         t.max = substream->buffer_bytes_max;
1753         t.openmin = 0;
1754         t.openmax = 0;
1755         t.integer = 1;
1756         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1757 }               
1758
1759 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1760 {
1761         struct snd_pcm_runtime *runtime = substream->runtime;
1762         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1763         int k, err;
1764
1765         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1766                 snd_mask_any(constrs_mask(constrs, k));
1767         }
1768
1769         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1770                 snd_interval_any(constrs_interval(constrs, k));
1771         }
1772
1773         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1774         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1775         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1776         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1777         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1778
1779         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1780                                    snd_pcm_hw_rule_format, NULL,
1781                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1782         if (err < 0)
1783                 return err;
1784         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1785                                   snd_pcm_hw_rule_sample_bits, NULL,
1786                                   SNDRV_PCM_HW_PARAM_FORMAT, 
1787                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1788         if (err < 0)
1789                 return err;
1790         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1791                                   snd_pcm_hw_rule_div, NULL,
1792                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1793         if (err < 0)
1794                 return err;
1795         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1796                                   snd_pcm_hw_rule_mul, NULL,
1797                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1798         if (err < 0)
1799                 return err;
1800         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1801                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1802                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1803         if (err < 0)
1804                 return err;
1805         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1806                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1807                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1808         if (err < 0)
1809                 return err;
1810         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 
1811                                   snd_pcm_hw_rule_div, NULL,
1812                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1813         if (err < 0)
1814                 return err;
1815         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1816                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1817                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1818         if (err < 0)
1819                 return err;
1820         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1821                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1822                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1823         if (err < 0)
1824                 return err;
1825         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 
1826                                   snd_pcm_hw_rule_div, NULL,
1827                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1828         if (err < 0)
1829                 return err;
1830         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1831                                   snd_pcm_hw_rule_div, NULL,
1832                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1833         if (err < 0)
1834                 return err;
1835         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1836                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1837                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1838         if (err < 0)
1839                 return err;
1840         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1841                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1842                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1843         if (err < 0)
1844                 return err;
1845         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1846                                   snd_pcm_hw_rule_mul, NULL,
1847                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1848         if (err < 0)
1849                 return err;
1850         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1851                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1852                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1853         if (err < 0)
1854                 return err;
1855         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1856                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1857                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1858         if (err < 0)
1859                 return err;
1860         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 
1861                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1862                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1863         if (err < 0)
1864                 return err;
1865         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
1866                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1867                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1868         if (err < 0)
1869                 return err;
1870         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 
1871                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1872                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1873         if (err < 0)
1874                 return err;
1875         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 
1876                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1877                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1878         if (err < 0)
1879                 return err;
1880         return 0;
1881 }
1882
1883 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1884 {
1885         struct snd_pcm_runtime *runtime = substream->runtime;
1886         struct snd_pcm_hardware *hw = &runtime->hw;
1887         int err;
1888         unsigned int mask = 0;
1889
1890         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1891                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1892         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1893                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1894         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1895                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1896                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1897                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1898                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1899                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1900                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1901         }
1902         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1903         if (err < 0)
1904                 return err;
1905
1906         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1907         if (err < 0)
1908                 return err;
1909
1910         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1911         if (err < 0)
1912                 return err;
1913
1914         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1915                                            hw->channels_min, hw->channels_max);
1916         if (err < 0)
1917                 return err;
1918
1919         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1920                                            hw->rate_min, hw->rate_max);
1921         if (err < 0)
1922                 return err;
1923
1924         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1925                                            hw->period_bytes_min, hw->period_bytes_max);
1926         if (err < 0)
1927                 return err;
1928
1929         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1930                                            hw->periods_min, hw->periods_max);
1931         if (err < 0)
1932                 return err;
1933
1934         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1935                                            hw->period_bytes_min, hw->buffer_bytes_max);
1936         if (err < 0)
1937                 return err;
1938
1939         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
1940                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1941                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1942         if (err < 0)
1943                 return err;
1944
1945         /* FIXME: remove */
1946         if (runtime->dma_bytes) {
1947                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1948                 if (err < 0)
1949                         return -EINVAL;
1950         }
1951
1952         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1953                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1954                                           snd_pcm_hw_rule_rate, hw,
1955                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1956                 if (err < 0)
1957                         return err;
1958         }
1959
1960         /* FIXME: this belong to lowlevel */
1961         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1962
1963         return 0;
1964 }
1965
1966 static void pcm_release_private(struct snd_pcm_substream *substream)
1967 {
1968         snd_pcm_unlink(substream);
1969 }
1970
1971 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1972 {
1973         substream->ref_count--;
1974         if (substream->ref_count > 0)
1975                 return;
1976
1977         snd_pcm_drop(substream);
1978         if (substream->hw_opened) {
1979                 if (substream->ops->hw_free != NULL)
1980                         substream->ops->hw_free(substream);
1981                 substream->ops->close(substream);
1982                 substream->hw_opened = 0;
1983         }
1984         if (substream->pcm_release) {
1985                 substream->pcm_release(substream);
1986                 substream->pcm_release = NULL;
1987         }
1988         snd_pcm_detach_substream(substream);
1989 }
1990
1991 EXPORT_SYMBOL(snd_pcm_release_substream);
1992
1993 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
1994                            struct file *file,
1995                            struct snd_pcm_substream **rsubstream)
1996 {
1997         struct snd_pcm_substream *substream;
1998         int err;
1999
2000         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2001         if (err < 0)
2002                 return err;
2003         if (substream->ref_count > 1) {
2004                 *rsubstream = substream;
2005                 return 0;
2006         }
2007
2008         err = snd_pcm_hw_constraints_init(substream);
2009         if (err < 0) {
2010                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2011                 goto error;
2012         }
2013
2014         if ((err = substream->ops->open(substream)) < 0)
2015                 goto error;
2016
2017         substream->hw_opened = 1;
2018
2019         err = snd_pcm_hw_constraints_complete(substream);
2020         if (err < 0) {
2021                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2022                 goto error;
2023         }
2024
2025         *rsubstream = substream;
2026         return 0;
2027
2028  error:
2029         snd_pcm_release_substream(substream);
2030         return err;
2031 }
2032
2033 EXPORT_SYMBOL(snd_pcm_open_substream);
2034
2035 static int snd_pcm_open_file(struct file *file,
2036                              struct snd_pcm *pcm,
2037                              int stream,
2038                              struct snd_pcm_file **rpcm_file)
2039 {
2040         struct snd_pcm_file *pcm_file;
2041         struct snd_pcm_substream *substream;
2042         struct snd_pcm_str *str;
2043         int err;
2044
2045         if (rpcm_file)
2046                 *rpcm_file = NULL;
2047
2048         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2049         if (err < 0)
2050                 return err;
2051
2052         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2053         if (pcm_file == NULL) {
2054                 snd_pcm_release_substream(substream);
2055                 return -ENOMEM;
2056         }
2057         pcm_file->substream = substream;
2058         if (substream->ref_count == 1) {
2059                 str = substream->pstr;
2060                 substream->file = pcm_file;
2061                 substream->pcm_release = pcm_release_private;
2062         }
2063         file->private_data = pcm_file;
2064         if (rpcm_file)
2065                 *rpcm_file = pcm_file;
2066         return 0;
2067 }
2068
2069 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2070 {
2071         struct snd_pcm *pcm;
2072
2073         pcm = snd_lookup_minor_data(iminor(inode),
2074                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2075         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2076 }
2077
2078 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2079 {
2080         struct snd_pcm *pcm;
2081
2082         pcm = snd_lookup_minor_data(iminor(inode),
2083                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2084         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2085 }
2086
2087 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2088 {
2089         int err;
2090         struct snd_pcm_file *pcm_file;
2091         wait_queue_t wait;
2092
2093         if (pcm == NULL) {
2094                 err = -ENODEV;
2095                 goto __error1;
2096         }
2097         err = snd_card_file_add(pcm->card, file);
2098         if (err < 0)
2099                 goto __error1;
2100         if (!try_module_get(pcm->card->module)) {
2101                 err = -EFAULT;
2102                 goto __error2;
2103         }
2104         init_waitqueue_entry(&wait, current);
2105         add_wait_queue(&pcm->open_wait, &wait);
2106         mutex_lock(&pcm->open_mutex);
2107         while (1) {
2108                 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2109                 if (err >= 0)
2110                         break;
2111                 if (err == -EAGAIN) {
2112                         if (file->f_flags & O_NONBLOCK) {
2113                                 err = -EBUSY;
2114                                 break;
2115                         }
2116                 } else
2117                         break;
2118                 set_current_state(TASK_INTERRUPTIBLE);
2119                 mutex_unlock(&pcm->open_mutex);
2120                 schedule();
2121                 mutex_lock(&pcm->open_mutex);
2122                 if (signal_pending(current)) {
2123                         err = -ERESTARTSYS;
2124                         break;
2125                 }
2126         }
2127         remove_wait_queue(&pcm->open_wait, &wait);
2128         mutex_unlock(&pcm->open_mutex);
2129         if (err < 0)
2130                 goto __error;
2131         return err;
2132
2133       __error:
2134         module_put(pcm->card->module);
2135       __error2:
2136         snd_card_file_remove(pcm->card, file);
2137       __error1:
2138         return err;
2139 }
2140
2141 static int snd_pcm_release(struct inode *inode, struct file *file)
2142 {
2143         struct snd_pcm *pcm;
2144         struct snd_pcm_substream *substream;
2145         struct snd_pcm_file *pcm_file;
2146
2147         pcm_file = file->private_data;
2148         substream = pcm_file->substream;
2149         if (snd_BUG_ON(!substream))
2150                 return -ENXIO;
2151         pcm = substream->pcm;
2152         mutex_lock(&pcm->open_mutex);
2153         snd_pcm_release_substream(substream);
2154         kfree(pcm_file);
2155         mutex_unlock(&pcm->open_mutex);
2156         wake_up(&pcm->open_wait);
2157         module_put(pcm->card->module);
2158         snd_card_file_remove(pcm->card, file);
2159         return 0;
2160 }
2161
2162 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2163                                                  snd_pcm_uframes_t frames)
2164 {
2165         struct snd_pcm_runtime *runtime = substream->runtime;
2166         snd_pcm_sframes_t appl_ptr;
2167         snd_pcm_sframes_t ret;
2168         snd_pcm_sframes_t hw_avail;
2169
2170         if (frames == 0)
2171                 return 0;
2172
2173         snd_pcm_stream_lock_irq(substream);
2174         switch (runtime->status->state) {
2175         case SNDRV_PCM_STATE_PREPARED:
2176                 break;
2177         case SNDRV_PCM_STATE_DRAINING:
2178         case SNDRV_PCM_STATE_RUNNING:
2179                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2180                         break;
2181                 /* Fall through */
2182         case SNDRV_PCM_STATE_XRUN:
2183                 ret = -EPIPE;
2184                 goto __end;
2185         case SNDRV_PCM_STATE_SUSPENDED:
2186                 ret = -ESTRPIPE;
2187                 goto __end;
2188         default:
2189                 ret = -EBADFD;
2190                 goto __end;
2191         }
2192
2193         hw_avail = snd_pcm_playback_hw_avail(runtime);
2194         if (hw_avail <= 0) {
2195                 ret = 0;
2196                 goto __end;
2197         }
2198         if (frames > (snd_pcm_uframes_t)hw_avail)
2199                 frames = hw_avail;
2200         appl_ptr = runtime->control->appl_ptr - frames;
2201         if (appl_ptr < 0)
2202                 appl_ptr += runtime->boundary;
2203         runtime->control->appl_ptr = appl_ptr;
2204         ret = frames;
2205  __end:
2206         snd_pcm_stream_unlock_irq(substream);
2207         return ret;
2208 }
2209
2210 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2211                                                 snd_pcm_uframes_t frames)
2212 {
2213         struct snd_pcm_runtime *runtime = substream->runtime;
2214         snd_pcm_sframes_t appl_ptr;
2215         snd_pcm_sframes_t ret;
2216         snd_pcm_sframes_t hw_avail;
2217
2218         if (frames == 0)
2219                 return 0;
2220
2221         snd_pcm_stream_lock_irq(substream);
2222         switch (runtime->status->state) {
2223         case SNDRV_PCM_STATE_PREPARED:
2224         case SNDRV_PCM_STATE_DRAINING:
2225                 break;
2226         case SNDRV_PCM_STATE_RUNNING:
2227                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2228                         break;
2229                 /* Fall through */
2230         case SNDRV_PCM_STATE_XRUN:
2231                 ret = -EPIPE;
2232                 goto __end;
2233         case SNDRV_PCM_STATE_SUSPENDED:
2234                 ret = -ESTRPIPE;
2235                 goto __end;
2236         default:
2237                 ret = -EBADFD;
2238                 goto __end;
2239         }
2240
2241         hw_avail = snd_pcm_capture_hw_avail(runtime);
2242         if (hw_avail <= 0) {
2243                 ret = 0;
2244                 goto __end;
2245         }
2246         if (frames > (snd_pcm_uframes_t)hw_avail)
2247                 frames = hw_avail;
2248         appl_ptr = runtime->control->appl_ptr - frames;
2249         if (appl_ptr < 0)
2250                 appl_ptr += runtime->boundary;
2251         runtime->control->appl_ptr = appl_ptr;
2252         ret = frames;
2253  __end:
2254         snd_pcm_stream_unlock_irq(substream);
2255         return ret;
2256 }
2257
2258 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2259                                                   snd_pcm_uframes_t frames)
2260 {
2261         struct snd_pcm_runtime *runtime = substream->runtime;
2262         snd_pcm_sframes_t appl_ptr;
2263         snd_pcm_sframes_t ret;
2264         snd_pcm_sframes_t avail;
2265
2266         if (frames == 0)
2267                 return 0;
2268
2269         snd_pcm_stream_lock_irq(substream);
2270         switch (runtime->status->state) {
2271         case SNDRV_PCM_STATE_PREPARED:
2272         case SNDRV_PCM_STATE_PAUSED:
2273                 break;
2274         case SNDRV_PCM_STATE_DRAINING:
2275         case SNDRV_PCM_STATE_RUNNING:
2276                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2277                         break;
2278                 /* Fall through */
2279         case SNDRV_PCM_STATE_XRUN:
2280                 ret = -EPIPE;
2281                 goto __end;
2282         case SNDRV_PCM_STATE_SUSPENDED:
2283                 ret = -ESTRPIPE;
2284                 goto __end;
2285         default:
2286                 ret = -EBADFD;
2287                 goto __end;
2288         }
2289
2290         avail = snd_pcm_playback_avail(runtime);
2291         if (avail <= 0) {
2292                 ret = 0;
2293                 goto __end;
2294         }
2295         if (frames > (snd_pcm_uframes_t)avail)
2296                 frames = avail;
2297         appl_ptr = runtime->control->appl_ptr + frames;
2298         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2299                 appl_ptr -= runtime->boundary;
2300         runtime->control->appl_ptr = appl_ptr;
2301         ret = frames;
2302  __end:
2303         snd_pcm_stream_unlock_irq(substream);
2304         return ret;
2305 }
2306
2307 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2308                                                  snd_pcm_uframes_t frames)
2309 {
2310         struct snd_pcm_runtime *runtime = substream->runtime;
2311         snd_pcm_sframes_t appl_ptr;
2312         snd_pcm_sframes_t ret;
2313         snd_pcm_sframes_t avail;
2314
2315         if (frames == 0)
2316                 return 0;
2317
2318         snd_pcm_stream_lock_irq(substream);
2319         switch (runtime->status->state) {
2320         case SNDRV_PCM_STATE_PREPARED:
2321         case SNDRV_PCM_STATE_DRAINING:
2322         case SNDRV_PCM_STATE_PAUSED:
2323                 break;
2324         case SNDRV_PCM_STATE_RUNNING:
2325                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2326                         break;
2327                 /* Fall through */
2328         case SNDRV_PCM_STATE_XRUN:
2329                 ret = -EPIPE;
2330                 goto __end;
2331         case SNDRV_PCM_STATE_SUSPENDED:
2332                 ret = -ESTRPIPE;
2333                 goto __end;
2334         default:
2335                 ret = -EBADFD;
2336                 goto __end;
2337         }
2338
2339         avail = snd_pcm_capture_avail(runtime);
2340         if (avail <= 0) {
2341                 ret = 0;
2342                 goto __end;
2343         }
2344         if (frames > (snd_pcm_uframes_t)avail)
2345                 frames = avail;
2346         appl_ptr = runtime->control->appl_ptr + frames;
2347         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2348                 appl_ptr -= runtime->boundary;
2349         runtime->control->appl_ptr = appl_ptr;
2350         ret = frames;
2351  __end:
2352         snd_pcm_stream_unlock_irq(substream);
2353         return ret;
2354 }
2355
2356 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2357 {
2358         struct snd_pcm_runtime *runtime = substream->runtime;
2359         int err;
2360
2361         snd_pcm_stream_lock_irq(substream);
2362         switch (runtime->status->state) {
2363         case SNDRV_PCM_STATE_DRAINING:
2364                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2365                         goto __badfd;
2366         case SNDRV_PCM_STATE_RUNNING:
2367                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2368                         break;
2369                 /* Fall through */
2370         case SNDRV_PCM_STATE_PREPARED:
2371         case SNDRV_PCM_STATE_SUSPENDED:
2372                 err = 0;
2373                 break;
2374         case SNDRV_PCM_STATE_XRUN:
2375                 err = -EPIPE;
2376                 break;
2377         default:
2378               __badfd:
2379                 err = -EBADFD;
2380                 break;
2381         }
2382         snd_pcm_stream_unlock_irq(substream);
2383         return err;
2384 }
2385                 
2386 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2387                          snd_pcm_sframes_t __user *res)
2388 {
2389         struct snd_pcm_runtime *runtime = substream->runtime;
2390         int err;
2391         snd_pcm_sframes_t n = 0;
2392
2393         snd_pcm_stream_lock_irq(substream);
2394         switch (runtime->status->state) {
2395         case SNDRV_PCM_STATE_DRAINING:
2396                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2397                         goto __badfd;
2398         case SNDRV_PCM_STATE_RUNNING:
2399                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2400                         break;
2401                 /* Fall through */
2402         case SNDRV_PCM_STATE_PREPARED:
2403         case SNDRV_PCM_STATE_SUSPENDED:
2404                 err = 0;
2405                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2406                         n = snd_pcm_playback_hw_avail(runtime);
2407                 else
2408                         n = snd_pcm_capture_avail(runtime);
2409                 n += runtime->delay;
2410                 break;
2411         case SNDRV_PCM_STATE_XRUN:
2412                 err = -EPIPE;
2413                 break;
2414         default:
2415               __badfd:
2416                 err = -EBADFD;
2417                 break;
2418         }
2419         snd_pcm_stream_unlock_irq(substream);
2420         if (!err)
2421                 if (put_user(n, res))
2422                         err = -EFAULT;
2423         return err;
2424 }
2425                 
2426 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2427                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2428 {
2429         struct snd_pcm_runtime *runtime = substream->runtime;
2430         struct snd_pcm_sync_ptr sync_ptr;
2431         volatile struct snd_pcm_mmap_status *status;
2432         volatile struct snd_pcm_mmap_control *control;
2433         int err;
2434
2435         memset(&sync_ptr, 0, sizeof(sync_ptr));
2436         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2437                 return -EFAULT;
2438         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2439                 return -EFAULT; 
2440         status = runtime->status;
2441         control = runtime->control;
2442         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2443                 err = snd_pcm_hwsync(substream);
2444                 if (err < 0)
2445                         return err;
2446         }
2447         snd_pcm_stream_lock_irq(substream);
2448         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2449                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2450         else
2451                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2452         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2453                 control->avail_min = sync_ptr.c.control.avail_min;
2454         else
2455                 sync_ptr.c.control.avail_min = control->avail_min;
2456         sync_ptr.s.status.state = status->state;
2457         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2458         sync_ptr.s.status.tstamp = status->tstamp;
2459         sync_ptr.s.status.suspended_state = status->suspended_state;
2460         snd_pcm_stream_unlock_irq(substream);
2461         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2462                 return -EFAULT;
2463         return 0;
2464 }
2465
2466 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2467 {
2468         struct snd_pcm_runtime *runtime = substream->runtime;
2469         int arg;
2470         
2471         if (get_user(arg, _arg))
2472                 return -EFAULT;
2473         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2474                 return -EINVAL;
2475         runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2476         if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2477                 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2478         return 0;
2479 }
2480                 
2481 static int snd_pcm_common_ioctl1(struct file *file,
2482                                  struct snd_pcm_substream *substream,
2483                                  unsigned int cmd, void __user *arg)
2484 {
2485         switch (cmd) {
2486         case SNDRV_PCM_IOCTL_PVERSION:
2487                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2488         case SNDRV_PCM_IOCTL_INFO:
2489                 return snd_pcm_info_user(substream, arg);
2490         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2491                 return 0;
2492         case SNDRV_PCM_IOCTL_TTSTAMP:
2493                 return snd_pcm_tstamp(substream, arg);
2494         case SNDRV_PCM_IOCTL_HW_REFINE:
2495                 return snd_pcm_hw_refine_user(substream, arg);
2496         case SNDRV_PCM_IOCTL_HW_PARAMS:
2497                 return snd_pcm_hw_params_user(substream, arg);
2498         case SNDRV_PCM_IOCTL_HW_FREE:
2499                 return snd_pcm_hw_free(substream);
2500         case SNDRV_PCM_IOCTL_SW_PARAMS:
2501                 return snd_pcm_sw_params_user(substream, arg);
2502         case SNDRV_PCM_IOCTL_STATUS:
2503                 return snd_pcm_status_user(substream, arg);
2504         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2505                 return snd_pcm_channel_info_user(substream, arg);
2506         case SNDRV_PCM_IOCTL_PREPARE:
2507                 return snd_pcm_prepare(substream, file);
2508         case SNDRV_PCM_IOCTL_RESET:
2509                 return snd_pcm_reset(substream);
2510         case SNDRV_PCM_IOCTL_START:
2511                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2512         case SNDRV_PCM_IOCTL_LINK:
2513                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2514         case SNDRV_PCM_IOCTL_UNLINK:
2515                 return snd_pcm_unlink(substream);
2516         case SNDRV_PCM_IOCTL_RESUME:
2517                 return snd_pcm_resume(substream);
2518         case SNDRV_PCM_IOCTL_XRUN:
2519                 return snd_pcm_xrun(substream);
2520         case SNDRV_PCM_IOCTL_HWSYNC:
2521                 return snd_pcm_hwsync(substream);
2522         case SNDRV_PCM_IOCTL_DELAY:
2523                 return snd_pcm_delay(substream, arg);
2524         case SNDRV_PCM_IOCTL_SYNC_PTR:
2525                 return snd_pcm_sync_ptr(substream, arg);
2526 #ifdef CONFIG_SND_SUPPORT_OLD_API
2527         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2528                 return snd_pcm_hw_refine_old_user(substream, arg);
2529         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2530                 return snd_pcm_hw_params_old_user(substream, arg);
2531 #endif
2532         case SNDRV_PCM_IOCTL_DRAIN:
2533                 return snd_pcm_drain(substream, file);
2534         case SNDRV_PCM_IOCTL_DROP:
2535                 return snd_pcm_drop(substream);
2536         case SNDRV_PCM_IOCTL_PAUSE:
2537         {
2538                 int res;
2539                 snd_pcm_stream_lock_irq(substream);
2540                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2541                 snd_pcm_stream_unlock_irq(substream);
2542                 return res;
2543         }
2544         }
2545         snd_printd("unknown ioctl = 0x%x\n", cmd);
2546         return -ENOTTY;
2547 }
2548
2549 static int snd_pcm_playback_ioctl1(struct file *file,
2550                                    struct snd_pcm_substream *substream,
2551                                    unsigned int cmd, void __user *arg)
2552 {
2553         if (snd_BUG_ON(!substream))
2554                 return -ENXIO;
2555         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2556                 return -EINVAL;
2557         switch (cmd) {
2558         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2559         {
2560                 struct snd_xferi xferi;
2561                 struct snd_xferi __user *_xferi = arg;
2562                 struct snd_pcm_runtime *runtime = substream->runtime;
2563                 snd_pcm_sframes_t result;
2564                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2565                         return -EBADFD;
2566                 if (put_user(0, &_xferi->result))
2567                         return -EFAULT;
2568                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2569                         return -EFAULT;
2570                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2571                 __put_user(result, &_xferi->result);
2572                 return result < 0 ? result : 0;
2573         }
2574         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2575         {
2576                 struct snd_xfern xfern;
2577                 struct snd_xfern __user *_xfern = arg;
2578                 struct snd_pcm_runtime *runtime = substream->runtime;
2579                 void __user **bufs;
2580                 snd_pcm_sframes_t result;
2581                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2582                         return -EBADFD;
2583                 if (runtime->channels > 128)
2584                         return -EINVAL;
2585                 if (put_user(0, &_xfern->result))
2586                         return -EFAULT;
2587                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2588                         return -EFAULT;
2589
2590                 bufs = memdup_user(xfern.bufs,
2591                                    sizeof(void *) * runtime->channels);
2592                 if (IS_ERR(bufs))
2593                         return PTR_ERR(bufs);
2594                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2595                 kfree(bufs);
2596                 __put_user(result, &_xfern->result);
2597                 return result < 0 ? result : 0;
2598         }
2599         case SNDRV_PCM_IOCTL_REWIND:
2600         {
2601                 snd_pcm_uframes_t frames;
2602                 snd_pcm_uframes_t __user *_frames = arg;
2603                 snd_pcm_sframes_t result;
2604                 if (get_user(frames, _frames))
2605                         return -EFAULT;
2606                 if (put_user(0, _frames))
2607                         return -EFAULT;
2608                 result = snd_pcm_playback_rewind(substream, frames);
2609                 __put_user(result, _frames);
2610                 return result < 0 ? result : 0;
2611         }
2612         case SNDRV_PCM_IOCTL_FORWARD:
2613         {
2614                 snd_pcm_uframes_t frames;
2615                 snd_pcm_uframes_t __user *_frames = arg;
2616                 snd_pcm_sframes_t result;
2617                 if (get_user(frames, _frames))
2618                         return -EFAULT;
2619                 if (put_user(0, _frames))
2620                         return -EFAULT;
2621                 result = snd_pcm_playback_forward(substream, frames);
2622                 __put_user(result, _frames);
2623                 return result < 0 ? result : 0;
2624         }
2625         }
2626         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2627 }
2628
2629 static int snd_pcm_capture_ioctl1(struct file *file,
2630                                   struct snd_pcm_substream *substream,
2631                                   unsigned int cmd, void __user *arg)
2632 {
2633         if (snd_BUG_ON(!substream))
2634                 return -ENXIO;
2635         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2636                 return -EINVAL;
2637         switch (cmd) {
2638         case SNDRV_PCM_IOCTL_READI_FRAMES:
2639         {
2640                 struct snd_xferi xferi;
2641                 struct snd_xferi __user *_xferi = arg;
2642                 struct snd_pcm_runtime *runtime = substream->runtime;
2643                 snd_pcm_sframes_t result;
2644                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2645                         return -EBADFD;
2646                 if (put_user(0, &_xferi->result))
2647                         return -EFAULT;
2648                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2649                         return -EFAULT;
2650                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2651                 __put_user(result, &_xferi->result);
2652                 return result < 0 ? result : 0;
2653         }
2654         case SNDRV_PCM_IOCTL_READN_FRAMES:
2655         {
2656                 struct snd_xfern xfern;
2657                 struct snd_xfern __user *_xfern = arg;
2658                 struct snd_pcm_runtime *runtime = substream->runtime;
2659                 void *bufs;
2660                 snd_pcm_sframes_t result;
2661                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2662                         return -EBADFD;
2663                 if (runtime->channels > 128)
2664                         return -EINVAL;
2665                 if (put_user(0, &_xfern->result))
2666                         return -EFAULT;
2667                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2668                         return -EFAULT;
2669
2670                 bufs = memdup_user(xfern.bufs,
2671                                    sizeof(void *) * runtime->channels);
2672                 if (IS_ERR(bufs))
2673                         return PTR_ERR(bufs);
2674                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2675                 kfree(bufs);
2676                 __put_user(result, &_xfern->result);
2677                 return result < 0 ? result : 0;
2678         }
2679         case SNDRV_PCM_IOCTL_REWIND:
2680         {
2681                 snd_pcm_uframes_t frames;
2682                 snd_pcm_uframes_t __user *_frames = arg;
2683                 snd_pcm_sframes_t result;
2684                 if (get_user(frames, _frames))
2685                         return -EFAULT;
2686                 if (put_user(0, _frames))
2687                         return -EFAULT;
2688                 result = snd_pcm_capture_rewind(substream, frames);
2689                 __put_user(result, _frames);
2690                 return result < 0 ? result : 0;
2691         }
2692         case SNDRV_PCM_IOCTL_FORWARD:
2693         {
2694                 snd_pcm_uframes_t frames;
2695                 snd_pcm_uframes_t __user *_frames = arg;
2696                 snd_pcm_sframes_t result;
2697                 if (get_user(frames, _frames))
2698                         return -EFAULT;
2699                 if (put_user(0, _frames))
2700                         return -EFAULT;
2701                 result = snd_pcm_capture_forward(substream, frames);
2702                 __put_user(result, _frames);
2703                 return result < 0 ? result : 0;
2704         }
2705         }
2706         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2707 }
2708
2709 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2710                                    unsigned long arg)
2711 {
2712         struct snd_pcm_file *pcm_file;
2713
2714         pcm_file = file->private_data;
2715
2716         if (((cmd >> 8) & 0xff) != 'A')
2717                 return -ENOTTY;
2718
2719         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2720                                        (void __user *)arg);
2721 }
2722
2723 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2724                                   unsigned long arg)
2725 {
2726         struct snd_pcm_file *pcm_file;
2727
2728         pcm_file = file->private_data;
2729
2730         if (((cmd >> 8) & 0xff) != 'A')
2731                 return -ENOTTY;
2732
2733         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2734                                       (void __user *)arg);
2735 }
2736
2737 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2738                          unsigned int cmd, void *arg)
2739 {
2740         mm_segment_t fs;
2741         int result;
2742         
2743         fs = snd_enter_user();
2744         switch (substream->stream) {
2745         case SNDRV_PCM_STREAM_PLAYBACK:
2746                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2747                                                  (void __user *)arg);
2748                 break;
2749         case SNDRV_PCM_STREAM_CAPTURE:
2750                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2751                                                 (void __user *)arg);
2752                 break;
2753         default:
2754                 result = -EINVAL;
2755                 break;
2756         }
2757         snd_leave_user(fs);
2758         return result;
2759 }
2760
2761 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2762
2763 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2764                             loff_t * offset)
2765 {
2766         struct snd_pcm_file *pcm_file;
2767         struct snd_pcm_substream *substream;
2768         struct snd_pcm_runtime *runtime;
2769         snd_pcm_sframes_t result;
2770
2771         pcm_file = file->private_data;
2772         substream = pcm_file->substream;
2773         if (PCM_RUNTIME_CHECK(substream))
2774                 return -ENXIO;
2775         runtime = substream->runtime;
2776         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2777                 return -EBADFD;
2778         if (!frame_aligned(runtime, count))
2779                 return -EINVAL;
2780         count = bytes_to_frames(runtime, count);
2781         result = snd_pcm_lib_read(substream, buf, count);
2782         if (result > 0)
2783                 result = frames_to_bytes(runtime, result);
2784         return result;
2785 }
2786
2787 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2788                              size_t count, loff_t * offset)
2789 {
2790         struct snd_pcm_file *pcm_file;
2791         struct snd_pcm_substream *substream;
2792         struct snd_pcm_runtime *runtime;
2793         snd_pcm_sframes_t result;
2794
2795         pcm_file = file->private_data;
2796         substream = pcm_file->substream;
2797         if (PCM_RUNTIME_CHECK(substream))
2798                 return -ENXIO;
2799         runtime = substream->runtime;
2800         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2801                 return -EBADFD;
2802         if (!frame_aligned(runtime, count))
2803                 return -EINVAL;
2804         count = bytes_to_frames(runtime, count);
2805         result = snd_pcm_lib_write(substream, buf, count);
2806         if (result > 0)
2807                 result = frames_to_bytes(runtime, result);
2808         return result;
2809 }
2810
2811 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2812                              unsigned long nr_segs, loff_t pos)
2813
2814 {
2815         struct snd_pcm_file *pcm_file;
2816         struct snd_pcm_substream *substream;
2817         struct snd_pcm_runtime *runtime;
2818         snd_pcm_sframes_t result;
2819         unsigned long i;
2820         void __user **bufs;
2821         snd_pcm_uframes_t frames;
2822
2823         pcm_file = iocb->ki_filp->private_data;
2824         substream = pcm_file->substream;
2825         if (PCM_RUNTIME_CHECK(substream))
2826                 return -ENXIO;
2827         runtime = substream->runtime;
2828         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2829                 return -EBADFD;
2830         if (nr_segs > 1024 || nr_segs != runtime->channels)
2831                 return -EINVAL;
2832         if (!frame_aligned(runtime, iov->iov_len))
2833                 return -EINVAL;
2834         frames = bytes_to_samples(runtime, iov->iov_len);
2835         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2836         if (bufs == NULL)
2837                 return -ENOMEM;
2838         for (i = 0; i < nr_segs; ++i)
2839                 bufs[i] = iov[i].iov_base;
2840         result = snd_pcm_lib_readv(substream, bufs, frames);
2841         if (result > 0)
2842                 result = frames_to_bytes(runtime, result);
2843         kfree(bufs);
2844         return result;
2845 }
2846
2847 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2848                               unsigned long nr_segs, loff_t pos)
2849 {
2850         struct snd_pcm_file *pcm_file;
2851         struct snd_pcm_substream *substream;
2852         struct snd_pcm_runtime *runtime;
2853         snd_pcm_sframes_t result;
2854         unsigned long i;
2855         void __user **bufs;
2856         snd_pcm_uframes_t frames;
2857
2858         pcm_file = iocb->ki_filp->private_data;
2859         substream = pcm_file->substream;
2860         if (PCM_RUNTIME_CHECK(substream))
2861                 return -ENXIO;
2862         runtime = substream->runtime;
2863         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2864                 return -EBADFD;
2865         if (nr_segs > 128 || nr_segs != runtime->channels ||
2866             !frame_aligned(runtime, iov->iov_len))
2867                 return -EINVAL;
2868         frames = bytes_to_samples(runtime, iov->iov_len);
2869         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2870         if (bufs == NULL)
2871                 return -ENOMEM;
2872         for (i = 0; i < nr_segs; ++i)
2873                 bufs[i] = iov[i].iov_base;
2874         result = snd_pcm_lib_writev(substream, bufs, frames);
2875         if (result > 0)
2876                 result = frames_to_bytes(runtime, result);
2877         kfree(bufs);
2878         return result;
2879 }
2880
2881 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2882 {
2883         struct snd_pcm_file *pcm_file;
2884         struct snd_pcm_substream *substream;
2885         struct snd_pcm_runtime *runtime;
2886         unsigned int mask;
2887         snd_pcm_uframes_t avail;
2888
2889         pcm_file = file->private_data;
2890
2891         substream = pcm_file->substream;
2892         if (PCM_RUNTIME_CHECK(substream))
2893                 return -ENXIO;
2894         runtime = substream->runtime;
2895
2896         poll_wait(file, &runtime->sleep, wait);
2897
2898         snd_pcm_stream_lock_irq(substream);
2899         avail = snd_pcm_playback_avail(runtime);
2900         switch (runtime->status->state) {
2901         case SNDRV_PCM_STATE_RUNNING:
2902         case SNDRV_PCM_STATE_PREPARED:
2903         case SNDRV_PCM_STATE_PAUSED:
2904                 if (avail >= runtime->control->avail_min) {
2905                         mask = POLLOUT | POLLWRNORM;
2906                         break;
2907                 }
2908                 /* Fall through */
2909         case SNDRV_PCM_STATE_DRAINING:
2910                 mask = 0;
2911                 break;
2912         default:
2913                 mask = POLLOUT | POLLWRNORM | POLLERR;
2914                 break;
2915         }
2916         snd_pcm_stream_unlock_irq(substream);
2917         return mask;
2918 }
2919
2920 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2921 {
2922         struct snd_pcm_file *pcm_file;
2923         struct snd_pcm_substream *substream;
2924         struct snd_pcm_runtime *runtime;
2925         unsigned int mask;
2926         snd_pcm_uframes_t avail;
2927
2928         pcm_file = file->private_data;
2929
2930         substream = pcm_file->substream;
2931         if (PCM_RUNTIME_CHECK(substream))
2932                 return -ENXIO;
2933         runtime = substream->runtime;
2934
2935         poll_wait(file, &runtime->sleep, wait);
2936
2937         snd_pcm_stream_lock_irq(substream);
2938         avail = snd_pcm_capture_avail(runtime);
2939         switch (runtime->status->state) {
2940         case SNDRV_PCM_STATE_RUNNING:
2941         case SNDRV_PCM_STATE_PREPARED:
2942         case SNDRV_PCM_STATE_PAUSED:
2943                 if (avail >= runtime->control->avail_min) {
2944                         mask = POLLIN | POLLRDNORM;
2945                         break;
2946                 }
2947                 mask = 0;
2948                 break;
2949         case SNDRV_PCM_STATE_DRAINING:
2950                 if (avail > 0) {
2951                         mask = POLLIN | POLLRDNORM;
2952                         break;
2953                 }
2954                 /* Fall through */
2955         default:
2956                 mask = POLLIN | POLLRDNORM | POLLERR;
2957                 break;
2958         }
2959         snd_pcm_stream_unlock_irq(substream);
2960         return mask;
2961 }
2962
2963 /*
2964  * mmap support
2965  */
2966
2967 /*
2968  * Only on coherent architectures, we can mmap the status and the control records
2969  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
2970  */
2971 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2972 /*
2973  * mmap status record
2974  */
2975 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2976                                                 struct vm_fault *vmf)
2977 {
2978         struct snd_pcm_substream *substream = area->vm_private_data;
2979         struct snd_pcm_runtime *runtime;
2980         
2981         if (substream == NULL)
2982                 return VM_FAULT_SIGBUS;
2983         runtime = substream->runtime;
2984         vmf->page = virt_to_page(runtime->status);
2985         get_page(vmf->page);
2986         return 0;
2987 }
2988
2989 static const struct vm_operations_struct snd_pcm_vm_ops_status =
2990 {
2991         .fault =        snd_pcm_mmap_status_fault,
2992 };
2993
2994 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
2995                                struct vm_area_struct *area)
2996 {
2997         struct snd_pcm_runtime *runtime;
2998         long size;
2999         if (!(area->vm_flags & VM_READ))
3000                 return -EINVAL;
3001         runtime = substream->runtime;
3002         size = area->vm_end - area->vm_start;
3003         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3004                 return -EINVAL;
3005         area->vm_ops = &snd_pcm_vm_ops_status;
3006         area->vm_private_data = substream;
3007         area->vm_flags |= VM_RESERVED;
3008         return 0;
3009 }
3010
3011 /*
3012  * mmap control record
3013  */
3014 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3015                                                 struct vm_fault *vmf)
3016 {
3017         struct snd_pcm_substream *substream = area->vm_private_data;
3018         struct snd_pcm_runtime *runtime;
3019         
3020         if (substream == NULL)
3021                 return VM_FAULT_SIGBUS;
3022         runtime = substream->runtime;
3023         vmf->page = virt_to_page(runtime->control);
3024         get_page(vmf->page);
3025         return 0;
3026 }
3027
3028 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3029 {
3030         .fault =        snd_pcm_mmap_control_fault,
3031 };
3032
3033 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3034                                 struct vm_area_struct *area)
3035 {
3036         struct snd_pcm_runtime *runtime;
3037         long size;
3038         if (!(area->vm_flags & VM_READ))
3039                 return -EINVAL;
3040         runtime = substream->runtime;
3041         size = area->vm_end - area->vm_start;
3042         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3043                 return -EINVAL;
3044         area->vm_ops = &snd_pcm_vm_ops_control;
3045         area->vm_private_data = substream;
3046         area->vm_flags |= VM_RESERVED;
3047         return 0;
3048 }
3049 #else /* ! coherent mmap */
3050 /*
3051  * don't support mmap for status and control records.
3052  */
3053 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3054                                struct vm_area_struct *area)
3055 {
3056         return -ENXIO;
3057 }
3058 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3059                                 struct vm_area_struct *area)
3060 {
3061         return -ENXIO;
3062 }
3063 #endif /* coherent mmap */
3064
3065 static inline struct page *
3066 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3067 {
3068         void *vaddr = substream->runtime->dma_area + ofs;
3069 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3070         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3071                 return virt_to_page(CAC_ADDR(vaddr));
3072 #endif
3073 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3074         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3075                 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3076                 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3077                 /* assume dma_handle set via pfn_to_phys() in
3078                  * mm/dma-noncoherent.c
3079                  */
3080                 return pfn_to_page(addr >> PAGE_SHIFT);
3081         }
3082 #endif
3083         return virt_to_page(vaddr);
3084 }
3085
3086 /*
3087  * fault callback for mmapping a RAM page
3088  */
3089 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3090                                                 struct vm_fault *vmf)
3091 {
3092         struct snd_pcm_substream *substream = area->vm_private_data;
3093         struct snd_pcm_runtime *runtime;
3094         unsigned long offset;
3095         struct page * page;
3096         size_t dma_bytes;
3097         
3098         if (substream == NULL)
3099                 return VM_FAULT_SIGBUS;
3100         runtime = substream->runtime;
3101         offset = vmf->pgoff << PAGE_SHIFT;
3102         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3103         if (offset > dma_bytes - PAGE_SIZE)
3104                 return VM_FAULT_SIGBUS;
3105         if (substream->ops->page)
3106                 page = substream->ops->page(substream, offset);
3107         else
3108                 page = snd_pcm_default_page_ops(substream, offset);
3109         if (!page)
3110                 return VM_FAULT_SIGBUS;
3111         get_page(page);
3112         vmf->page = page;
3113         return 0;
3114 }
3115
3116 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3117         .open =         snd_pcm_mmap_data_open,
3118         .close =        snd_pcm_mmap_data_close,
3119 };
3120
3121 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3122         .open =         snd_pcm_mmap_data_open,
3123         .close =        snd_pcm_mmap_data_close,
3124         .fault =        snd_pcm_mmap_data_fault,
3125 };
3126
3127 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3128 /* This should be defined / handled globally! */
3129 #ifdef CONFIG_ARM
3130 #define ARCH_HAS_DMA_MMAP_COHERENT
3131 #endif
3132 #endif
3133
3134 /*
3135  * mmap the DMA buffer on RAM
3136  */
3137 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3138                                 struct vm_area_struct *area)
3139 {
3140         area->vm_flags |= VM_RESERVED;
3141 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3142         if (!substream->ops->page &&
3143             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3144                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3145                                          area,
3146                                          substream->runtime->dma_area,
3147                                          substream->runtime->dma_addr,
3148                                          area->vm_end - area->vm_start);
3149 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3150         /* mmap with fault handler */
3151         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3152         return 0;
3153 }
3154
3155 /*
3156  * mmap the DMA buffer on I/O memory area
3157  */
3158 #if SNDRV_PCM_INFO_MMAP_IOMEM
3159 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3160                            struct vm_area_struct *area)
3161 {
3162         long size;
3163         unsigned long offset;
3164
3165         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3166         area->vm_flags |= VM_IO;
3167         size = area->vm_end - area->vm_start;
3168         offset = area->vm_pgoff << PAGE_SHIFT;
3169         if (io_remap_pfn_range(area, area->vm_start,
3170                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3171                                 size, area->vm_page_prot))
3172                 return -EAGAIN;
3173         return 0;
3174 }
3175
3176 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3177 #endif /* SNDRV_PCM_INFO_MMAP */
3178
3179 /*
3180  * mmap DMA buffer
3181  */
3182 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3183                       struct vm_area_struct *area)
3184 {
3185         struct snd_pcm_runtime *runtime;
3186         long size;
3187         unsigned long offset;
3188         size_t dma_bytes;
3189         int err;
3190
3191         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3192                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3193                         return -EINVAL;
3194         } else {
3195                 if (!(area->vm_flags & VM_READ))
3196                         return -EINVAL;
3197         }
3198         runtime = substream->runtime;
3199         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3200                 return -EBADFD;
3201         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3202                 return -ENXIO;
3203         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3204             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3205                 return -EINVAL;
3206         size = area->vm_end - area->vm_start;
3207         offset = area->vm_pgoff << PAGE_SHIFT;
3208         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3209         if ((size_t)size > dma_bytes)
3210                 return -EINVAL;
3211         if (offset > dma_bytes - size)
3212                 return -EINVAL;
3213
3214         area->vm_ops = &snd_pcm_vm_ops_data;
3215         area->vm_private_data = substream;
3216         if (substream->ops->mmap)
3217                 err = substream->ops->mmap(substream, area);
3218         else
3219                 err = snd_pcm_default_mmap(substream, area);
3220         if (!err)
3221                 atomic_inc(&substream->mmap_count);
3222         return err;
3223 }
3224
3225 EXPORT_SYMBOL(snd_pcm_mmap_data);
3226
3227 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3228 {
3229         struct snd_pcm_file * pcm_file;
3230         struct snd_pcm_substream *substream;    
3231         unsigned long offset;
3232         
3233         pcm_file = file->private_data;
3234         substream = pcm_file->substream;
3235         if (PCM_RUNTIME_CHECK(substream))
3236                 return -ENXIO;
3237
3238         offset = area->vm_pgoff << PAGE_SHIFT;
3239         switch (offset) {
3240         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3241                 if (pcm_file->no_compat_mmap)
3242                         return -ENXIO;
3243                 return snd_pcm_mmap_status(substream, file, area);
3244         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3245                 if (pcm_file->no_compat_mmap)
3246                         return -ENXIO;
3247                 return snd_pcm_mmap_control(substream, file, area);
3248         default:
3249                 return snd_pcm_mmap_data(substream, file, area);
3250         }
3251         return 0;
3252 }
3253
3254 static int snd_pcm_fasync(int fd, struct file * file, int on)
3255 {
3256         struct snd_pcm_file * pcm_file;
3257         struct snd_pcm_substream *substream;
3258         struct snd_pcm_runtime *runtime;
3259         int err = -ENXIO;
3260
3261         lock_kernel();
3262         pcm_file = file->private_data;
3263         substream = pcm_file->substream;
3264         if (PCM_RUNTIME_CHECK(substream))
3265                 goto out;
3266         runtime = substream->runtime;
3267         err = fasync_helper(fd, file, on, &runtime->fasync);
3268 out:
3269         unlock_kernel();
3270         return err;
3271 }
3272
3273 /*
3274  * ioctl32 compat
3275  */
3276 #ifdef CONFIG_COMPAT
3277 #include "pcm_compat.c"
3278 #else
3279 #define snd_pcm_ioctl_compat    NULL
3280 #endif
3281
3282 /*
3283  *  To be removed helpers to keep binary compatibility
3284  */
3285
3286 #ifdef CONFIG_SND_SUPPORT_OLD_API
3287 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3288 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3289
3290 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3291                                                struct snd_pcm_hw_params_old *oparams)
3292 {
3293         unsigned int i;
3294
3295         memset(params, 0, sizeof(*params));
3296         params->flags = oparams->flags;
3297         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3298                 params->masks[i].bits[0] = oparams->masks[i];
3299         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3300         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3301         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3302         params->info = oparams->info;
3303         params->msbits = oparams->msbits;
3304         params->rate_num = oparams->rate_num;
3305         params->rate_den = oparams->rate_den;
3306         params->fifo_size = oparams->fifo_size;
3307 }
3308
3309 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3310                                              struct snd_pcm_hw_params *params)
3311 {
3312         unsigned int i;
3313
3314         memset(oparams, 0, sizeof(*oparams));
3315         oparams->flags = params->flags;
3316         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3317                 oparams->masks[i] = params->masks[i].bits[0];
3318         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3319         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3320         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3321         oparams->info = params->info;
3322         oparams->msbits = params->msbits;
3323         oparams->rate_num = params->rate_num;
3324         oparams->rate_den = params->rate_den;
3325         oparams->fifo_size = params->fifo_size;
3326 }
3327
3328 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3329                                       struct snd_pcm_hw_params_old __user * _oparams)
3330 {
3331         struct snd_pcm_hw_params *params;
3332         struct snd_pcm_hw_params_old *oparams = NULL;
3333         int err;
3334
3335         params = kmalloc(sizeof(*params), GFP_KERNEL);
3336         if (!params)
3337                 return -ENOMEM;
3338
3339         oparams = memdup_user(_oparams, sizeof(*oparams));
3340         if (IS_ERR(oparams)) {
3341                 err = PTR_ERR(oparams);
3342                 goto out;
3343         }
3344         snd_pcm_hw_convert_from_old_params(params, oparams);
3345         err = snd_pcm_hw_refine(substream, params);
3346         snd_pcm_hw_convert_to_old_params(oparams, params);
3347         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3348                 if (!err)
3349                         err = -EFAULT;
3350         }
3351
3352         kfree(oparams);
3353 out:
3354         kfree(params);
3355         return err;
3356 }
3357
3358 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3359                                       struct snd_pcm_hw_params_old __user * _oparams)
3360 {
3361         struct snd_pcm_hw_params *params;
3362         struct snd_pcm_hw_params_old *oparams = NULL;
3363         int err;
3364
3365         params = kmalloc(sizeof(*params), GFP_KERNEL);
3366         if (!params)
3367                 return -ENOMEM;
3368
3369         oparams = memdup_user(_oparams, sizeof(*oparams));
3370         if (IS_ERR(oparams)) {
3371                 err = PTR_ERR(oparams);
3372                 goto out;
3373         }
3374         snd_pcm_hw_convert_from_old_params(params, oparams);
3375         err = snd_pcm_hw_params(substream, params);
3376         snd_pcm_hw_convert_to_old_params(oparams, params);
3377         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3378                 if (!err)
3379                         err = -EFAULT;
3380         }
3381
3382         kfree(oparams);
3383 out:
3384         kfree(params);
3385         return err;
3386 }
3387 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3388
3389 #ifndef CONFIG_MMU
3390 unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
3391                                       unsigned long len, unsigned long pgoff,
3392                                       unsigned long flags)
3393 {
3394         return 0;
3395 }
3396 #else
3397 # define dummy_get_unmapped_area NULL
3398 #endif
3399
3400 /*
3401  *  Register section
3402  */
3403
3404 const struct file_operations snd_pcm_f_ops[2] = {
3405         {
3406                 .owner =                THIS_MODULE,
3407                 .write =                snd_pcm_write,
3408                 .aio_write =            snd_pcm_aio_write,
3409                 .open =                 snd_pcm_playback_open,
3410                 .release =              snd_pcm_release,
3411                 .poll =                 snd_pcm_playback_poll,
3412                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3413                 .compat_ioctl =         snd_pcm_ioctl_compat,
3414                 .mmap =                 snd_pcm_mmap,
3415                 .fasync =               snd_pcm_fasync,
3416                 .get_unmapped_area =    dummy_get_unmapped_area,
3417         },
3418         {
3419                 .owner =                THIS_MODULE,
3420                 .read =                 snd_pcm_read,
3421                 .aio_read =             snd_pcm_aio_read,
3422                 .open =                 snd_pcm_capture_open,
3423                 .release =              snd_pcm_release,
3424                 .poll =                 snd_pcm_capture_poll,
3425                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3426                 .compat_ioctl =         snd_pcm_ioctl_compat,
3427                 .mmap =                 snd_pcm_mmap,
3428                 .fasync =               snd_pcm_fasync,
3429                 .get_unmapped_area =    dummy_get_unmapped_area,
3430         }
3431 };