[ALSA] Fix control/status mmap with shared PCM substream
[linux-2.6.git] / sound / core / pcm_native.c
1 /*
2  *  Digital Audio (PCM) abstract layer
3  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4  *
5  *
6  *   This program is free software; you can redistribute it and/or modify
7  *   it under the terms of the GNU General Public License as published by
8  *   the Free Software Foundation; either version 2 of the License, or
9  *   (at your option) any later version.
10  *
11  *   This program is distributed in the hope that it will be useful,
12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *   GNU General Public License for more details.
15  *
16  *   You should have received a copy of the GNU General Public License
17  *   along with this program; if not, write to the Free Software
18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
19  *
20  */
21
22 #include <sound/driver.h>
23 #include <linux/mm.h>
24 #include <linux/smp_lock.h>
25 #include <linux/file.h>
26 #include <linux/slab.h>
27 #include <linux/time.h>
28 #include <linux/uio.h>
29 #include <sound/core.h>
30 #include <sound/control.h>
31 #include <sound/info.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/timer.h>
35 #include <sound/minors.h>
36 #include <asm/io.h>
37
38 /*
39  *  Compatibility
40  */
41
42 struct snd_pcm_hw_params_old {
43         unsigned int flags;
44         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
45                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
46         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
47                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
48         unsigned int rmask;
49         unsigned int cmask;
50         unsigned int info;
51         unsigned int msbits;
52         unsigned int rate_num;
53         unsigned int rate_den;
54         snd_pcm_uframes_t fifo_size;
55         unsigned char reserved[64];
56 };
57
58 #ifdef CONFIG_SND_SUPPORT_OLD_API
59 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
60 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
61
62 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
63                                       struct snd_pcm_hw_params_old __user * _oparams);
64 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
65                                       struct snd_pcm_hw_params_old __user * _oparams);
66 #endif
67 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
68
69 /*
70  *
71  */
72
73 DEFINE_RWLOCK(snd_pcm_link_rwlock);
74 EXPORT_SYMBOL(snd_pcm_link_rwlock);
75
76 static DECLARE_RWSEM(snd_pcm_link_rwsem);
77
78 static inline mm_segment_t snd_enter_user(void)
79 {
80         mm_segment_t fs = get_fs();
81         set_fs(get_ds());
82         return fs;
83 }
84
85 static inline void snd_leave_user(mm_segment_t fs)
86 {
87         set_fs(fs);
88 }
89
90
91
92 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
93 {
94         struct snd_pcm_runtime *runtime;
95         struct snd_pcm *pcm = substream->pcm;
96         struct snd_pcm_str *pstr = substream->pstr;
97
98         snd_assert(substream != NULL, return -ENXIO);
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("%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("%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("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;
317         if (!params->fifo_size)
318                 params->fifo_size = hw->fifo_size;
319         params->rmask = 0;
320         return 0;
321 }
322
323 EXPORT_SYMBOL(snd_pcm_hw_refine);
324
325 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
326                                   struct snd_pcm_hw_params __user * _params)
327 {
328         struct snd_pcm_hw_params *params;
329         int err;
330
331         params = kmalloc(sizeof(*params), GFP_KERNEL);
332         if (!params) {
333                 err = -ENOMEM;
334                 goto out;
335         }
336         if (copy_from_user(params, _params, sizeof(*params))) {
337                 err = -EFAULT;
338                 goto out;
339         }
340         err = snd_pcm_hw_refine(substream, params);
341         if (copy_to_user(_params, params, sizeof(*params))) {
342                 if (!err)
343                         err = -EFAULT;
344         }
345 out:
346         kfree(params);
347         return err;
348 }
349
350 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
351                              struct snd_pcm_hw_params *params)
352 {
353         struct snd_pcm_runtime *runtime;
354         int err;
355         unsigned int bits;
356         snd_pcm_uframes_t frames;
357
358         snd_assert(substream != NULL, return -ENXIO);
359         runtime = substream->runtime;
360         snd_assert(runtime != NULL, return -ENXIO);
361         snd_pcm_stream_lock_irq(substream);
362         switch (runtime->status->state) {
363         case SNDRV_PCM_STATE_OPEN:
364         case SNDRV_PCM_STATE_SETUP:
365         case SNDRV_PCM_STATE_PREPARED:
366                 break;
367         default:
368                 snd_pcm_stream_unlock_irq(substream);
369                 return -EBADFD;
370         }
371         snd_pcm_stream_unlock_irq(substream);
372 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
373         if (!substream->oss.oss)
374 #endif
375                 if (atomic_read(&substream->mmap_count))
376                         return -EBADFD;
377
378         params->rmask = ~0U;
379         err = snd_pcm_hw_refine(substream, params);
380         if (err < 0)
381                 goto _error;
382
383         err = snd_pcm_hw_params_choose(substream, params);
384         if (err < 0)
385                 goto _error;
386
387         if (substream->ops->hw_params != NULL) {
388                 err = substream->ops->hw_params(substream, params);
389                 if (err < 0)
390                         goto _error;
391         }
392
393         runtime->access = params_access(params);
394         runtime->format = params_format(params);
395         runtime->subformat = params_subformat(params);
396         runtime->channels = params_channels(params);
397         runtime->rate = params_rate(params);
398         runtime->period_size = params_period_size(params);
399         runtime->periods = params_periods(params);
400         runtime->buffer_size = params_buffer_size(params);
401         runtime->tick_time = params_tick_time(params);
402         runtime->info = params->info;
403         runtime->rate_num = params->rate_num;
404         runtime->rate_den = params->rate_den;
405
406         bits = snd_pcm_format_physical_width(runtime->format);
407         runtime->sample_bits = bits;
408         bits *= runtime->channels;
409         runtime->frame_bits = bits;
410         frames = 1;
411         while (bits % 8 != 0) {
412                 bits *= 2;
413                 frames *= 2;
414         }
415         runtime->byte_align = bits / 8;
416         runtime->min_align = frames;
417
418         /* Default sw params */
419         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
420         runtime->period_step = 1;
421         runtime->sleep_min = 0;
422         runtime->control->avail_min = runtime->period_size;
423         runtime->xfer_align = runtime->period_size;
424         runtime->start_threshold = 1;
425         runtime->stop_threshold = runtime->buffer_size;
426         runtime->silence_threshold = 0;
427         runtime->silence_size = 0;
428         runtime->boundary = runtime->buffer_size;
429         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
430                 runtime->boundary *= 2;
431
432         snd_pcm_timer_resolution_change(substream);
433         runtime->status->state = SNDRV_PCM_STATE_SETUP;
434         return 0;
435  _error:
436         /* hardware might be unuseable from this time,
437            so we force application to retry to set
438            the correct hardware parameter settings */
439         runtime->status->state = SNDRV_PCM_STATE_OPEN;
440         if (substream->ops->hw_free != NULL)
441                 substream->ops->hw_free(substream);
442         return err;
443 }
444
445 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
446                                   struct snd_pcm_hw_params __user * _params)
447 {
448         struct snd_pcm_hw_params *params;
449         int err;
450
451         params = kmalloc(sizeof(*params), GFP_KERNEL);
452         if (!params) {
453                 err = -ENOMEM;
454                 goto out;
455         }
456         if (copy_from_user(params, _params, sizeof(*params))) {
457                 err = -EFAULT;
458                 goto out;
459         }
460         err = snd_pcm_hw_params(substream, params);
461         if (copy_to_user(_params, params, sizeof(*params))) {
462                 if (!err)
463                         err = -EFAULT;
464         }
465 out:
466         kfree(params);
467         return err;
468 }
469
470 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
471 {
472         struct snd_pcm_runtime *runtime;
473         int result = 0;
474
475         snd_assert(substream != NULL, return -ENXIO);
476         runtime = substream->runtime;
477         snd_assert(runtime != NULL, return -ENXIO);
478         snd_pcm_stream_lock_irq(substream);
479         switch (runtime->status->state) {
480         case SNDRV_PCM_STATE_SETUP:
481         case SNDRV_PCM_STATE_PREPARED:
482                 break;
483         default:
484                 snd_pcm_stream_unlock_irq(substream);
485                 return -EBADFD;
486         }
487         snd_pcm_stream_unlock_irq(substream);
488         if (atomic_read(&substream->mmap_count))
489                 return -EBADFD;
490         if (substream->ops->hw_free)
491                 result = substream->ops->hw_free(substream);
492         runtime->status->state = SNDRV_PCM_STATE_OPEN;
493         return result;
494 }
495
496 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
497                              struct snd_pcm_sw_params *params)
498 {
499         struct snd_pcm_runtime *runtime;
500
501         snd_assert(substream != NULL, return -ENXIO);
502         runtime = substream->runtime;
503         snd_assert(runtime != NULL, return -ENXIO);
504         snd_pcm_stream_lock_irq(substream);
505         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
506                 snd_pcm_stream_unlock_irq(substream);
507                 return -EBADFD;
508         }
509         snd_pcm_stream_unlock_irq(substream);
510
511         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
512                 return -EINVAL;
513         if (params->avail_min == 0)
514                 return -EINVAL;
515         if (params->xfer_align == 0 ||
516             params->xfer_align % runtime->min_align != 0)
517                 return -EINVAL;
518         if (params->silence_size >= runtime->boundary) {
519                 if (params->silence_threshold != 0)
520                         return -EINVAL;
521         } else {
522                 if (params->silence_size > params->silence_threshold)
523                         return -EINVAL;
524                 if (params->silence_threshold > runtime->buffer_size)
525                         return -EINVAL;
526         }
527         snd_pcm_stream_lock_irq(substream);
528         runtime->tstamp_mode = params->tstamp_mode;
529         runtime->sleep_min = params->sleep_min;
530         runtime->period_step = params->period_step;
531         runtime->control->avail_min = params->avail_min;
532         runtime->start_threshold = params->start_threshold;
533         runtime->stop_threshold = params->stop_threshold;
534         runtime->silence_threshold = params->silence_threshold;
535         runtime->silence_size = params->silence_size;
536         runtime->xfer_align = params->xfer_align;
537         params->boundary = runtime->boundary;
538         if (snd_pcm_running(substream)) {
539                 if (runtime->sleep_min)
540                         snd_pcm_tick_prepare(substream);
541                 else
542                         snd_pcm_tick_set(substream, 0);
543                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
544                     runtime->silence_size > 0)
545                         snd_pcm_playback_silence(substream, ULONG_MAX);
546                 wake_up(&runtime->sleep);
547         }
548         snd_pcm_stream_unlock_irq(substream);
549         return 0;
550 }
551
552 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
553                                   struct snd_pcm_sw_params __user * _params)
554 {
555         struct snd_pcm_sw_params params;
556         int err;
557         if (copy_from_user(&params, _params, sizeof(params)))
558                 return -EFAULT;
559         err = snd_pcm_sw_params(substream, &params);
560         if (copy_to_user(_params, &params, sizeof(params)))
561                 return -EFAULT;
562         return err;
563 }
564
565 int snd_pcm_status(struct snd_pcm_substream *substream,
566                    struct snd_pcm_status *status)
567 {
568         struct snd_pcm_runtime *runtime = substream->runtime;
569
570         snd_pcm_stream_lock_irq(substream);
571         status->state = runtime->status->state;
572         status->suspended_state = runtime->status->suspended_state;
573         if (status->state == SNDRV_PCM_STATE_OPEN)
574                 goto _end;
575         status->trigger_tstamp = runtime->trigger_tstamp;
576         if (snd_pcm_running(substream)) {
577                 snd_pcm_update_hw_ptr(substream);
578                 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
579                         status->tstamp = runtime->status->tstamp;
580                 else
581                         getnstimeofday(&status->tstamp);
582         } else
583                 getnstimeofday(&status->tstamp);
584         status->appl_ptr = runtime->control->appl_ptr;
585         status->hw_ptr = runtime->status->hw_ptr;
586         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
587                 status->avail = snd_pcm_playback_avail(runtime);
588                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
589                     runtime->status->state == SNDRV_PCM_STATE_DRAINING)
590                         status->delay = runtime->buffer_size - status->avail;
591                 else
592                         status->delay = 0;
593         } else {
594                 status->avail = snd_pcm_capture_avail(runtime);
595                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
596                         status->delay = status->avail;
597                 else
598                         status->delay = 0;
599         }
600         status->avail_max = runtime->avail_max;
601         status->overrange = runtime->overrange;
602         runtime->avail_max = 0;
603         runtime->overrange = 0;
604  _end:
605         snd_pcm_stream_unlock_irq(substream);
606         return 0;
607 }
608
609 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
610                                struct snd_pcm_status __user * _status)
611 {
612         struct snd_pcm_status status;
613         struct snd_pcm_runtime *runtime;
614         int res;
615         
616         snd_assert(substream != NULL, return -ENXIO);
617         runtime = substream->runtime;
618         memset(&status, 0, sizeof(status));
619         res = snd_pcm_status(substream, &status);
620         if (res < 0)
621                 return res;
622         if (copy_to_user(_status, &status, sizeof(status)))
623                 return -EFAULT;
624         return 0;
625 }
626
627 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
628                                 struct snd_pcm_channel_info * info)
629 {
630         struct snd_pcm_runtime *runtime;
631         unsigned int channel;
632         
633         snd_assert(substream != NULL, return -ENXIO);
634         channel = info->channel;
635         runtime = substream->runtime;
636         snd_pcm_stream_lock_irq(substream);
637         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
638                 snd_pcm_stream_unlock_irq(substream);
639                 return -EBADFD;
640         }
641         snd_pcm_stream_unlock_irq(substream);
642         if (channel >= runtime->channels)
643                 return -EINVAL;
644         memset(info, 0, sizeof(*info));
645         info->channel = channel;
646         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
647 }
648
649 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
650                                      struct snd_pcm_channel_info __user * _info)
651 {
652         struct snd_pcm_channel_info info;
653         int res;
654         
655         if (copy_from_user(&info, _info, sizeof(info)))
656                 return -EFAULT;
657         res = snd_pcm_channel_info(substream, &info);
658         if (res < 0)
659                 return res;
660         if (copy_to_user(_info, &info, sizeof(info)))
661                 return -EFAULT;
662         return 0;
663 }
664
665 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
666 {
667         struct snd_pcm_runtime *runtime = substream->runtime;
668         if (runtime->trigger_master == NULL)
669                 return;
670         if (runtime->trigger_master == substream) {
671                 getnstimeofday(&runtime->trigger_tstamp);
672         } else {
673                 snd_pcm_trigger_tstamp(runtime->trigger_master);
674                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
675         }
676         runtime->trigger_master = NULL;
677 }
678
679 struct action_ops {
680         int (*pre_action)(struct snd_pcm_substream *substream, int state);
681         int (*do_action)(struct snd_pcm_substream *substream, int state);
682         void (*undo_action)(struct snd_pcm_substream *substream, int state);
683         void (*post_action)(struct snd_pcm_substream *substream, int state);
684 };
685
686 /*
687  *  this functions is core for handling of linked stream
688  *  Note: the stream state might be changed also on failure
689  *  Note2: call with calling stream lock + link lock
690  */
691 static int snd_pcm_action_group(struct action_ops *ops,
692                                 struct snd_pcm_substream *substream,
693                                 int state, int do_lock)
694 {
695         struct list_head *pos;
696         struct snd_pcm_substream *s = NULL;
697         struct snd_pcm_substream *s1;
698         int res = 0;
699
700         snd_pcm_group_for_each(pos, substream) {
701                 s = snd_pcm_group_substream_entry(pos);
702                 if (do_lock && s != substream)
703                         spin_lock(&s->self_group.lock);
704                 res = ops->pre_action(s, state);
705                 if (res < 0)
706                         goto _unlock;
707         }
708         snd_pcm_group_for_each(pos, substream) {
709                 s = snd_pcm_group_substream_entry(pos);
710                 res = ops->do_action(s, state);
711                 if (res < 0) {
712                         if (ops->undo_action) {
713                                 snd_pcm_group_for_each(pos, substream) {
714                                         s1 = snd_pcm_group_substream_entry(pos);
715                                         if (s1 == s) /* failed stream */
716                                                 break;
717                                         ops->undo_action(s1, state);
718                                 }
719                         }
720                         s = NULL; /* unlock all */
721                         goto _unlock;
722                 }
723         }
724         snd_pcm_group_for_each(pos, substream) {
725                 s = snd_pcm_group_substream_entry(pos);
726                 ops->post_action(s, state);
727         }
728  _unlock:
729         if (do_lock) {
730                 /* unlock streams */
731                 snd_pcm_group_for_each(pos, substream) {
732                         s1 = snd_pcm_group_substream_entry(pos);
733                         if (s1 != substream)
734                                 spin_unlock(&s1->self_group.lock);
735                         if (s1 == s)    /* end */
736                                 break;
737                 }
738         }
739         return res;
740 }
741
742 /*
743  *  Note: call with stream lock
744  */
745 static int snd_pcm_action_single(struct action_ops *ops,
746                                  struct snd_pcm_substream *substream,
747                                  int state)
748 {
749         int res;
750         
751         res = ops->pre_action(substream, state);
752         if (res < 0)
753                 return res;
754         res = ops->do_action(substream, state);
755         if (res == 0)
756                 ops->post_action(substream, state);
757         else if (ops->undo_action)
758                 ops->undo_action(substream, state);
759         return res;
760 }
761
762 /*
763  *  Note: call with stream lock
764  */
765 static int snd_pcm_action(struct action_ops *ops,
766                           struct snd_pcm_substream *substream,
767                           int state)
768 {
769         int res;
770
771         if (snd_pcm_stream_linked(substream)) {
772                 if (!spin_trylock(&substream->group->lock)) {
773                         spin_unlock(&substream->self_group.lock);
774                         spin_lock(&substream->group->lock);
775                         spin_lock(&substream->self_group.lock);
776                 }
777                 res = snd_pcm_action_group(ops, substream, state, 1);
778                 spin_unlock(&substream->group->lock);
779         } else {
780                 res = snd_pcm_action_single(ops, substream, state);
781         }
782         return res;
783 }
784
785 /*
786  *  Note: don't use any locks before
787  */
788 static int snd_pcm_action_lock_irq(struct action_ops *ops,
789                                    struct snd_pcm_substream *substream,
790                                    int state)
791 {
792         int res;
793
794         read_lock_irq(&snd_pcm_link_rwlock);
795         if (snd_pcm_stream_linked(substream)) {
796                 spin_lock(&substream->group->lock);
797                 spin_lock(&substream->self_group.lock);
798                 res = snd_pcm_action_group(ops, substream, state, 1);
799                 spin_unlock(&substream->self_group.lock);
800                 spin_unlock(&substream->group->lock);
801         } else {
802                 spin_lock(&substream->self_group.lock);
803                 res = snd_pcm_action_single(ops, substream, state);
804                 spin_unlock(&substream->self_group.lock);
805         }
806         read_unlock_irq(&snd_pcm_link_rwlock);
807         return res;
808 }
809
810 /*
811  */
812 static int snd_pcm_action_nonatomic(struct action_ops *ops,
813                                     struct snd_pcm_substream *substream,
814                                     int state)
815 {
816         int res;
817
818         down_read(&snd_pcm_link_rwsem);
819         if (snd_pcm_stream_linked(substream))
820                 res = snd_pcm_action_group(ops, substream, state, 0);
821         else
822                 res = snd_pcm_action_single(ops, substream, state);
823         up_read(&snd_pcm_link_rwsem);
824         return res;
825 }
826
827 /*
828  * start callbacks
829  */
830 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
831 {
832         struct snd_pcm_runtime *runtime = substream->runtime;
833         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
834                 return -EBADFD;
835         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
836             !snd_pcm_playback_data(substream))
837                 return -EPIPE;
838         runtime->trigger_master = substream;
839         return 0;
840 }
841
842 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
843 {
844         if (substream->runtime->trigger_master != substream)
845                 return 0;
846         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
847 }
848
849 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
850 {
851         if (substream->runtime->trigger_master == substream)
852                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
853 }
854
855 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
856 {
857         struct snd_pcm_runtime *runtime = substream->runtime;
858         snd_pcm_trigger_tstamp(substream);
859         runtime->status->state = state;
860         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
861             runtime->silence_size > 0)
862                 snd_pcm_playback_silence(substream, ULONG_MAX);
863         if (runtime->sleep_min)
864                 snd_pcm_tick_prepare(substream);
865         if (substream->timer)
866                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
867                                  &runtime->trigger_tstamp);
868 }
869
870 static struct action_ops snd_pcm_action_start = {
871         .pre_action = snd_pcm_pre_start,
872         .do_action = snd_pcm_do_start,
873         .undo_action = snd_pcm_undo_start,
874         .post_action = snd_pcm_post_start
875 };
876
877 /**
878  * snd_pcm_start
879  * @substream: the PCM substream instance
880  *
881  * Start all linked streams.
882  */
883 int snd_pcm_start(struct snd_pcm_substream *substream)
884 {
885         return snd_pcm_action(&snd_pcm_action_start, substream,
886                               SNDRV_PCM_STATE_RUNNING);
887 }
888
889 /*
890  * stop callbacks
891  */
892 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
893 {
894         struct snd_pcm_runtime *runtime = substream->runtime;
895         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
896                 return -EBADFD;
897         runtime->trigger_master = substream;
898         return 0;
899 }
900
901 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
902 {
903         if (substream->runtime->trigger_master == substream &&
904             snd_pcm_running(substream))
905                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
906         return 0; /* unconditonally stop all substreams */
907 }
908
909 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
910 {
911         struct snd_pcm_runtime *runtime = substream->runtime;
912         if (runtime->status->state != state) {
913                 snd_pcm_trigger_tstamp(substream);
914                 if (substream->timer)
915                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
916                                          &runtime->trigger_tstamp);
917                 runtime->status->state = state;
918                 snd_pcm_tick_set(substream, 0);
919         }
920         wake_up(&runtime->sleep);
921 }
922
923 static struct action_ops snd_pcm_action_stop = {
924         .pre_action = snd_pcm_pre_stop,
925         .do_action = snd_pcm_do_stop,
926         .post_action = snd_pcm_post_stop
927 };
928
929 /**
930  * snd_pcm_stop
931  * @substream: the PCM substream instance
932  * @state: PCM state after stopping the stream
933  *
934  * Try to stop all running streams in the substream group.
935  * The state of each stream is changed to the given value after that 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
946  * @substream: the PCM substream
947  *
948  * Stop the DMA only when the given stream is playback.
949  * The state is changed to SETUP.
950  * Unlike snd_pcm_stop(), this affects only the given stream.
951  */
952 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
953 {
954         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
955                                      SNDRV_PCM_STATE_SETUP);
956 }
957
958 /*
959  * pause callbacks
960  */
961 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
962 {
963         struct snd_pcm_runtime *runtime = substream->runtime;
964         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
965                 return -ENOSYS;
966         if (push) {
967                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
968                         return -EBADFD;
969         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
970                 return -EBADFD;
971         runtime->trigger_master = substream;
972         return 0;
973 }
974
975 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
976 {
977         if (substream->runtime->trigger_master != substream)
978                 return 0;
979         return substream->ops->trigger(substream,
980                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
981                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
982 }
983
984 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
985 {
986         if (substream->runtime->trigger_master == substream)
987                 substream->ops->trigger(substream,
988                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
989                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
990 }
991
992 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
993 {
994         struct snd_pcm_runtime *runtime = substream->runtime;
995         snd_pcm_trigger_tstamp(substream);
996         if (push) {
997                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
998                 if (substream->timer)
999                         snd_timer_notify(substream->timer,
1000                                          SNDRV_TIMER_EVENT_MPAUSE,
1001                                          &runtime->trigger_tstamp);
1002                 snd_pcm_tick_set(substream, 0);
1003                 wake_up(&runtime->sleep);
1004         } else {
1005                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1006                 if (runtime->sleep_min)
1007                         snd_pcm_tick_prepare(substream);
1008                 if (substream->timer)
1009                         snd_timer_notify(substream->timer,
1010                                          SNDRV_TIMER_EVENT_MCONTINUE,
1011                                          &runtime->trigger_tstamp);
1012         }
1013 }
1014
1015 static struct action_ops snd_pcm_action_pause = {
1016         .pre_action = snd_pcm_pre_pause,
1017         .do_action = snd_pcm_do_pause,
1018         .undo_action = snd_pcm_undo_pause,
1019         .post_action = snd_pcm_post_pause
1020 };
1021
1022 /*
1023  * Push/release the pause for all linked streams.
1024  */
1025 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1026 {
1027         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1028 }
1029
1030 #ifdef CONFIG_PM
1031 /* suspend */
1032
1033 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1034 {
1035         struct snd_pcm_runtime *runtime = substream->runtime;
1036         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1037                 return -EBUSY;
1038         runtime->trigger_master = substream;
1039         return 0;
1040 }
1041
1042 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1043 {
1044         struct snd_pcm_runtime *runtime = substream->runtime;
1045         if (runtime->trigger_master != substream)
1046                 return 0;
1047         if (! snd_pcm_running(substream))
1048                 return 0;
1049         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1050         return 0; /* suspend unconditionally */
1051 }
1052
1053 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1054 {
1055         struct snd_pcm_runtime *runtime = substream->runtime;
1056         snd_pcm_trigger_tstamp(substream);
1057         if (substream->timer)
1058                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1059                                  &runtime->trigger_tstamp);
1060         runtime->status->suspended_state = runtime->status->state;
1061         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1062         snd_pcm_tick_set(substream, 0);
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
1074  * @substream: the PCM substream
1075  *
1076  * Trigger SUSPEND to all linked streams.
1077  * After this call, all streams are changed to SUSPENDED state.
1078  */
1079 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1080 {
1081         int err;
1082         unsigned long flags;
1083
1084         if (! substream)
1085                 return 0;
1086
1087         snd_pcm_stream_lock_irqsave(substream, flags);
1088         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1089         snd_pcm_stream_unlock_irqrestore(substream, flags);
1090         return err;
1091 }
1092
1093 EXPORT_SYMBOL(snd_pcm_suspend);
1094
1095 /**
1096  * snd_pcm_suspend_all
1097  * @pcm: the PCM instance
1098  *
1099  * Trigger SUSPEND to all substreams in the given pcm.
1100  * After this call, all streams are changed to SUSPENDED state.
1101  */
1102 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1103 {
1104         struct snd_pcm_substream *substream;
1105         int stream, err = 0;
1106
1107         if (! pcm)
1108                 return 0;
1109
1110         for (stream = 0; stream < 2; stream++) {
1111                 for (substream = pcm->streams[stream].substream;
1112                      substream; substream = substream->next) {
1113                         /* FIXME: the open/close code should lock this as well */
1114                         if (substream->runtime == NULL)
1115                                 continue;
1116                         err = snd_pcm_suspend(substream);
1117                         if (err < 0 && err != -EBUSY)
1118                                 return err;
1119                 }
1120         }
1121         return 0;
1122 }
1123
1124 EXPORT_SYMBOL(snd_pcm_suspend_all);
1125
1126 /* resume */
1127
1128 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1129 {
1130         struct snd_pcm_runtime *runtime = substream->runtime;
1131         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1132                 return -ENOSYS;
1133         runtime->trigger_master = substream;
1134         return 0;
1135 }
1136
1137 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1138 {
1139         struct snd_pcm_runtime *runtime = substream->runtime;
1140         if (runtime->trigger_master != substream)
1141                 return 0;
1142         /* DMA not running previously? */
1143         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1144             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1145              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1146                 return 0;
1147         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1148 }
1149
1150 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1151 {
1152         if (substream->runtime->trigger_master == substream &&
1153             snd_pcm_running(substream))
1154                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1155 }
1156
1157 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1158 {
1159         struct snd_pcm_runtime *runtime = substream->runtime;
1160         snd_pcm_trigger_tstamp(substream);
1161         if (substream->timer)
1162                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1163                                  &runtime->trigger_tstamp);
1164         runtime->status->state = runtime->status->suspended_state;
1165         if (runtime->sleep_min)
1166                 snd_pcm_tick_prepare(substream);
1167 }
1168
1169 static struct action_ops snd_pcm_action_resume = {
1170         .pre_action = snd_pcm_pre_resume,
1171         .do_action = snd_pcm_do_resume,
1172         .undo_action = snd_pcm_undo_resume,
1173         .post_action = snd_pcm_post_resume
1174 };
1175
1176 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1177 {
1178         struct snd_card *card = substream->pcm->card;
1179         int res;
1180
1181         snd_power_lock(card);
1182         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1183                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1184         snd_power_unlock(card);
1185         return res;
1186 }
1187
1188 #else
1189
1190 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1191 {
1192         return -ENOSYS;
1193 }
1194
1195 #endif /* CONFIG_PM */
1196
1197 /*
1198  * xrun ioctl
1199  *
1200  * Change the RUNNING stream(s) to XRUN state.
1201  */
1202 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1203 {
1204         struct snd_card *card = substream->pcm->card;
1205         struct snd_pcm_runtime *runtime = substream->runtime;
1206         int result;
1207
1208         snd_power_lock(card);
1209         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1210                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1211                 if (result < 0)
1212                         goto _unlock;
1213         }
1214
1215         snd_pcm_stream_lock_irq(substream);
1216         switch (runtime->status->state) {
1217         case SNDRV_PCM_STATE_XRUN:
1218                 result = 0;     /* already there */
1219                 break;
1220         case SNDRV_PCM_STATE_RUNNING:
1221                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1222                 break;
1223         default:
1224                 result = -EBADFD;
1225         }
1226         snd_pcm_stream_unlock_irq(substream);
1227  _unlock:
1228         snd_power_unlock(card);
1229         return result;
1230 }
1231
1232 /*
1233  * reset ioctl
1234  */
1235 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1236 {
1237         struct snd_pcm_runtime *runtime = substream->runtime;
1238         switch (runtime->status->state) {
1239         case SNDRV_PCM_STATE_RUNNING:
1240         case SNDRV_PCM_STATE_PREPARED:
1241         case SNDRV_PCM_STATE_PAUSED:
1242         case SNDRV_PCM_STATE_SUSPENDED:
1243                 return 0;
1244         default:
1245                 return -EBADFD;
1246         }
1247 }
1248
1249 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1250 {
1251         struct snd_pcm_runtime *runtime = substream->runtime;
1252         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1253         if (err < 0)
1254                 return err;
1255         // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1256         runtime->hw_ptr_base = 0;
1257         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1258                 runtime->status->hw_ptr % runtime->period_size;
1259         runtime->silence_start = runtime->status->hw_ptr;
1260         runtime->silence_filled = 0;
1261         return 0;
1262 }
1263
1264 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1265 {
1266         struct snd_pcm_runtime *runtime = substream->runtime;
1267         runtime->control->appl_ptr = runtime->status->hw_ptr;
1268         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1269             runtime->silence_size > 0)
1270                 snd_pcm_playback_silence(substream, ULONG_MAX);
1271 }
1272
1273 static struct action_ops snd_pcm_action_reset = {
1274         .pre_action = snd_pcm_pre_reset,
1275         .do_action = snd_pcm_do_reset,
1276         .post_action = snd_pcm_post_reset
1277 };
1278
1279 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1280 {
1281         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1282 }
1283
1284 /*
1285  * prepare ioctl
1286  */
1287 /* we use the second argument for updating f_flags */
1288 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1289                                int f_flags)
1290 {
1291         struct snd_pcm_runtime *runtime = substream->runtime;
1292         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1293                 return -EBADFD;
1294         if (snd_pcm_running(substream))
1295                 return -EBUSY;
1296         substream->f_flags = f_flags;
1297         return 0;
1298 }
1299
1300 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1301 {
1302         int err;
1303         err = substream->ops->prepare(substream);
1304         if (err < 0)
1305                 return err;
1306         return snd_pcm_do_reset(substream, 0);
1307 }
1308
1309 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1310 {
1311         struct snd_pcm_runtime *runtime = substream->runtime;
1312         runtime->control->appl_ptr = runtime->status->hw_ptr;
1313         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1314 }
1315
1316 static struct action_ops snd_pcm_action_prepare = {
1317         .pre_action = snd_pcm_pre_prepare,
1318         .do_action = snd_pcm_do_prepare,
1319         .post_action = snd_pcm_post_prepare
1320 };
1321
1322 /**
1323  * snd_pcm_prepare
1324  * @substream: the PCM substream instance
1325  * @file: file to refer f_flags
1326  *
1327  * Prepare the PCM substream to be triggerable.
1328  */
1329 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1330                            struct file *file)
1331 {
1332         int res;
1333         struct snd_card *card = substream->pcm->card;
1334         int f_flags;
1335
1336         if (file)
1337                 f_flags = file->f_flags;
1338         else
1339                 f_flags = substream->f_flags;
1340
1341         snd_power_lock(card);
1342         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1343                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1344                                                substream, f_flags);
1345         snd_power_unlock(card);
1346         return res;
1347 }
1348
1349 /*
1350  * drain ioctl
1351  */
1352
1353 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1354 {
1355         if (substream->f_flags & O_NONBLOCK)
1356                 return -EAGAIN;
1357         substream->runtime->trigger_master = substream;
1358         return 0;
1359 }
1360
1361 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1362 {
1363         struct snd_pcm_runtime *runtime = substream->runtime;
1364         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1365                 switch (runtime->status->state) {
1366                 case SNDRV_PCM_STATE_PREPARED:
1367                         /* start playback stream if possible */
1368                         if (! snd_pcm_playback_empty(substream)) {
1369                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1370                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1371                         }
1372                         break;
1373                 case SNDRV_PCM_STATE_RUNNING:
1374                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1375                         break;
1376                 default:
1377                         break;
1378                 }
1379         } else {
1380                 /* stop running stream */
1381                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1382                         int state = snd_pcm_capture_avail(runtime) > 0 ?
1383                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1384                         snd_pcm_do_stop(substream, state);
1385                         snd_pcm_post_stop(substream, state);
1386                 }
1387         }
1388         return 0;
1389 }
1390
1391 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1392 {
1393 }
1394
1395 static struct action_ops snd_pcm_action_drain_init = {
1396         .pre_action = snd_pcm_pre_drain_init,
1397         .do_action = snd_pcm_do_drain_init,
1398         .post_action = snd_pcm_post_drain_init
1399 };
1400
1401 struct drain_rec {
1402         struct snd_pcm_substream *substream;
1403         wait_queue_t wait;
1404         snd_pcm_uframes_t stop_threshold;
1405 };
1406
1407 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1408
1409 /*
1410  * Drain the stream(s).
1411  * When the substream is linked, sync until the draining of all playback streams
1412  * is finished.
1413  * After this call, all streams are supposed to be either SETUP or DRAINING
1414  * (capture only) state.
1415  */
1416 static int snd_pcm_drain(struct snd_pcm_substream *substream)
1417 {
1418         struct snd_card *card;
1419         struct snd_pcm_runtime *runtime;
1420         struct list_head *pos;
1421         int result = 0;
1422         int i, num_drecs;
1423         struct drain_rec *drec, drec_tmp, *d;
1424
1425         snd_assert(substream != NULL, return -ENXIO);
1426         card = substream->pcm->card;
1427         runtime = substream->runtime;
1428
1429         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1430                 return -EBADFD;
1431
1432         snd_power_lock(card);
1433         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1434                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1435                 if (result < 0) {
1436                         snd_power_unlock(card);
1437                         return result;
1438                 }
1439         }
1440
1441         /* allocate temporary record for drain sync */
1442         down_read(&snd_pcm_link_rwsem);
1443         if (snd_pcm_stream_linked(substream)) {
1444                 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1445                 if (! drec) {
1446                         up_read(&snd_pcm_link_rwsem);
1447                         snd_power_unlock(card);
1448                         return -ENOMEM;
1449                 }
1450         } else
1451                 drec = &drec_tmp;
1452
1453         /* count only playback streams */
1454         num_drecs = 0;
1455         snd_pcm_group_for_each(pos, substream) {
1456                 struct snd_pcm_substream *s = snd_pcm_group_substream_entry(pos);
1457                 runtime = s->runtime;
1458                 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1459                         d = &drec[num_drecs++];
1460                         d->substream = s;
1461                         init_waitqueue_entry(&d->wait, current);
1462                         add_wait_queue(&runtime->sleep, &d->wait);
1463                         /* stop_threshold fixup to avoid endless loop when
1464                          * stop_threshold > buffer_size
1465                          */
1466                         d->stop_threshold = runtime->stop_threshold;
1467                         if (runtime->stop_threshold > runtime->buffer_size)
1468                                 runtime->stop_threshold = runtime->buffer_size;
1469                 }
1470         }
1471         up_read(&snd_pcm_link_rwsem);
1472
1473         snd_pcm_stream_lock_irq(substream);
1474         /* resume pause */
1475         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1476                 snd_pcm_pause(substream, 0);
1477
1478         /* pre-start/stop - all running streams are changed to DRAINING state */
1479         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1480         if (result < 0) {
1481                 snd_pcm_stream_unlock_irq(substream);
1482                 goto _error;
1483         }
1484
1485         for (;;) {
1486                 long tout;
1487                 if (signal_pending(current)) {
1488                         result = -ERESTARTSYS;
1489                         break;
1490                 }
1491                 /* all finished? */
1492                 for (i = 0; i < num_drecs; i++) {
1493                         runtime = drec[i].substream->runtime;
1494                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1495                                 break;
1496                 }
1497                 if (i == num_drecs)
1498                         break; /* yes, all drained */
1499
1500                 set_current_state(TASK_INTERRUPTIBLE);
1501                 snd_pcm_stream_unlock_irq(substream);
1502                 snd_power_unlock(card);
1503                 tout = schedule_timeout(10 * HZ);
1504                 snd_power_lock(card);
1505                 snd_pcm_stream_lock_irq(substream);
1506                 if (tout == 0) {
1507                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1508                                 result = -ESTRPIPE;
1509                         else {
1510                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1511                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1512                                 result = -EIO;
1513                         }
1514                         break;
1515                 }
1516         }
1517
1518         snd_pcm_stream_unlock_irq(substream);
1519
1520  _error:
1521         for (i = 0; i < num_drecs; i++) {
1522                 d = &drec[i];
1523                 runtime = d->substream->runtime;
1524                 remove_wait_queue(&runtime->sleep, &d->wait);
1525                 runtime->stop_threshold = d->stop_threshold;
1526         }
1527
1528         if (drec != &drec_tmp)
1529                 kfree(drec);
1530         snd_power_unlock(card);
1531
1532         return result;
1533 }
1534
1535 /*
1536  * drop ioctl
1537  *
1538  * Immediately put all linked substreams into SETUP state.
1539  */
1540 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1541 {
1542         struct snd_pcm_runtime *runtime;
1543         struct snd_card *card;
1544         int result = 0;
1545         
1546         snd_assert(substream != NULL, return -ENXIO);
1547         runtime = substream->runtime;
1548         card = substream->pcm->card;
1549
1550         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1551                 return -EBADFD;
1552
1553         snd_power_lock(card);
1554         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1555                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1556                 if (result < 0)
1557                         goto _unlock;
1558         }
1559
1560         snd_pcm_stream_lock_irq(substream);
1561         /* resume pause */
1562         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1563                 snd_pcm_pause(substream, 0);
1564
1565         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1566         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1567         snd_pcm_stream_unlock_irq(substream);
1568  _unlock:
1569         snd_power_unlock(card);
1570         return result;
1571 }
1572
1573
1574 /* WARNING: Don't forget to fput back the file */
1575 static struct file *snd_pcm_file_fd(int fd)
1576 {
1577         struct file *file;
1578         struct inode *inode;
1579         unsigned int minor;
1580
1581         file = fget(fd);
1582         if (!file)
1583                 return NULL;
1584         inode = file->f_dentry->d_inode;
1585         if (!S_ISCHR(inode->i_mode) ||
1586             imajor(inode) != snd_major) {
1587                 fput(file);
1588                 return NULL;
1589         }
1590         minor = iminor(inode);
1591         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1592             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1593                 fput(file);
1594                 return NULL;
1595         }
1596         return file;
1597 }
1598
1599 /*
1600  * PCM link handling
1601  */
1602 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1603 {
1604         int res = 0;
1605         struct file *file;
1606         struct snd_pcm_file *pcm_file;
1607         struct snd_pcm_substream *substream1;
1608
1609         file = snd_pcm_file_fd(fd);
1610         if (!file)
1611                 return -EBADFD;
1612         pcm_file = file->private_data;
1613         substream1 = pcm_file->substream;
1614         down_write(&snd_pcm_link_rwsem);
1615         write_lock_irq(&snd_pcm_link_rwlock);
1616         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1617             substream->runtime->status->state != substream1->runtime->status->state) {
1618                 res = -EBADFD;
1619                 goto _end;
1620         }
1621         if (snd_pcm_stream_linked(substream1)) {
1622                 res = -EALREADY;
1623                 goto _end;
1624         }
1625         if (!snd_pcm_stream_linked(substream)) {
1626                 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1627                 if (substream->group == NULL) {
1628                         res = -ENOMEM;
1629                         goto _end;
1630                 }
1631                 spin_lock_init(&substream->group->lock);
1632                 INIT_LIST_HEAD(&substream->group->substreams);
1633                 list_add_tail(&substream->link_list, &substream->group->substreams);
1634                 substream->group->count = 1;
1635         }
1636         list_add_tail(&substream1->link_list, &substream->group->substreams);
1637         substream->group->count++;
1638         substream1->group = substream->group;
1639  _end:
1640         write_unlock_irq(&snd_pcm_link_rwlock);
1641         up_write(&snd_pcm_link_rwsem);
1642         fput(file);
1643         return res;
1644 }
1645
1646 static void relink_to_local(struct snd_pcm_substream *substream)
1647 {
1648         substream->group = &substream->self_group;
1649         INIT_LIST_HEAD(&substream->self_group.substreams);
1650         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1651 }
1652
1653 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1654 {
1655         struct list_head *pos;
1656         int res = 0;
1657
1658         down_write(&snd_pcm_link_rwsem);
1659         write_lock_irq(&snd_pcm_link_rwlock);
1660         if (!snd_pcm_stream_linked(substream)) {
1661                 res = -EALREADY;
1662                 goto _end;
1663         }
1664         list_del(&substream->link_list);
1665         substream->group->count--;
1666         if (substream->group->count == 1) {     /* detach the last stream, too */
1667                 snd_pcm_group_for_each(pos, substream) {
1668                         relink_to_local(snd_pcm_group_substream_entry(pos));
1669                         break;
1670                 }
1671                 kfree(substream->group);
1672         }
1673         relink_to_local(substream);
1674        _end:
1675         write_unlock_irq(&snd_pcm_link_rwlock);
1676         up_write(&snd_pcm_link_rwsem);
1677         return res;
1678 }
1679
1680 /*
1681  * hw configurator
1682  */
1683 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1684                                struct snd_pcm_hw_rule *rule)
1685 {
1686         struct snd_interval t;
1687         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1688                      hw_param_interval_c(params, rule->deps[1]), &t);
1689         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1690 }
1691
1692 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1693                                struct snd_pcm_hw_rule *rule)
1694 {
1695         struct snd_interval t;
1696         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1697                      hw_param_interval_c(params, rule->deps[1]), &t);
1698         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1699 }
1700
1701 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1702                                    struct snd_pcm_hw_rule *rule)
1703 {
1704         struct snd_interval t;
1705         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1706                          hw_param_interval_c(params, rule->deps[1]),
1707                          (unsigned long) rule->private, &t);
1708         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1709 }
1710
1711 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1712                                    struct snd_pcm_hw_rule *rule)
1713 {
1714         struct snd_interval t;
1715         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1716                          (unsigned long) rule->private,
1717                          hw_param_interval_c(params, rule->deps[1]), &t);
1718         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1719 }
1720
1721 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1722                                   struct snd_pcm_hw_rule *rule)
1723 {
1724         unsigned int k;
1725         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1726         struct snd_mask m;
1727         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1728         snd_mask_any(&m);
1729         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1730                 int bits;
1731                 if (! snd_mask_test(mask, k))
1732                         continue;
1733                 bits = snd_pcm_format_physical_width(k);
1734                 if (bits <= 0)
1735                         continue; /* ignore invalid formats */
1736                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1737                         snd_mask_reset(&m, k);
1738         }
1739         return snd_mask_refine(mask, &m);
1740 }
1741
1742 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1743                                        struct snd_pcm_hw_rule *rule)
1744 {
1745         struct snd_interval t;
1746         unsigned int k;
1747         t.min = UINT_MAX;
1748         t.max = 0;
1749         t.openmin = 0;
1750         t.openmax = 0;
1751         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1752                 int bits;
1753                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1754                         continue;
1755                 bits = snd_pcm_format_physical_width(k);
1756                 if (bits <= 0)
1757                         continue; /* ignore invalid formats */
1758                 if (t.min > (unsigned)bits)
1759                         t.min = bits;
1760                 if (t.max < (unsigned)bits)
1761                         t.max = bits;
1762         }
1763         t.integer = 1;
1764         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1765 }
1766
1767 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1768 #error "Change this table"
1769 #endif
1770
1771 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1772                                  48000, 64000, 88200, 96000, 176400, 192000 };
1773
1774 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1775                                 struct snd_pcm_hw_rule *rule)
1776 {
1777         struct snd_pcm_hardware *hw = rule->private;
1778         return snd_interval_list(hw_param_interval(params, rule->var),
1779                                  ARRAY_SIZE(rates), rates, hw->rates);
1780 }               
1781
1782 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1783                                             struct snd_pcm_hw_rule *rule)
1784 {
1785         struct snd_interval t;
1786         struct snd_pcm_substream *substream = rule->private;
1787         t.min = 0;
1788         t.max = substream->buffer_bytes_max;
1789         t.openmin = 0;
1790         t.openmax = 0;
1791         t.integer = 1;
1792         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1793 }               
1794
1795 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1796 {
1797         struct snd_pcm_runtime *runtime = substream->runtime;
1798         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1799         int k, err;
1800
1801         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1802                 snd_mask_any(constrs_mask(constrs, k));
1803         }
1804
1805         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1806                 snd_interval_any(constrs_interval(constrs, k));
1807         }
1808
1809         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1810         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1811         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1812         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1813         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1814
1815         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1816                                    snd_pcm_hw_rule_format, NULL,
1817                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1818         if (err < 0)
1819                 return err;
1820         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1821                                   snd_pcm_hw_rule_sample_bits, NULL,
1822                                   SNDRV_PCM_HW_PARAM_FORMAT, 
1823                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1824         if (err < 0)
1825                 return err;
1826         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1827                                   snd_pcm_hw_rule_div, NULL,
1828                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1829         if (err < 0)
1830                 return err;
1831         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1832                                   snd_pcm_hw_rule_mul, NULL,
1833                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1834         if (err < 0)
1835                 return err;
1836         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1837                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1838                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1839         if (err < 0)
1840                 return err;
1841         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1842                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1843                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1844         if (err < 0)
1845                 return err;
1846         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 
1847                                   snd_pcm_hw_rule_div, NULL,
1848                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1849         if (err < 0)
1850                 return err;
1851         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1852                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1853                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1854         if (err < 0)
1855                 return err;
1856         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1857                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1858                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1859         if (err < 0)
1860                 return err;
1861         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 
1862                                   snd_pcm_hw_rule_div, NULL,
1863                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1864         if (err < 0)
1865                 return err;
1866         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1867                                   snd_pcm_hw_rule_div, NULL,
1868                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1869         if (err < 0)
1870                 return err;
1871         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1872                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1873                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1874         if (err < 0)
1875                 return err;
1876         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1877                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1878                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1879         if (err < 0)
1880                 return err;
1881         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1882                                   snd_pcm_hw_rule_mul, NULL,
1883                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1884         if (err < 0)
1885                 return err;
1886         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1887                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1888                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1889         if (err < 0)
1890                 return err;
1891         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1892                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1893                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1894         if (err < 0)
1895                 return err;
1896         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 
1897                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1898                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1899         if (err < 0)
1900                 return err;
1901         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
1902                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1903                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1904         if (err < 0)
1905                 return err;
1906         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 
1907                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1908                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1909         if (err < 0)
1910                 return err;
1911         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 
1912                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1913                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1914         if (err < 0)
1915                 return err;
1916         return 0;
1917 }
1918
1919 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1920 {
1921         struct snd_pcm_runtime *runtime = substream->runtime;
1922         struct snd_pcm_hardware *hw = &runtime->hw;
1923         int err;
1924         unsigned int mask = 0;
1925
1926         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1927                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1928         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1929                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1930         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1931                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1932                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1933                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1934                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1935                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1936                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1937         }
1938         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1939         snd_assert(err >= 0, return -EINVAL);
1940
1941         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1942         snd_assert(err >= 0, return -EINVAL);
1943
1944         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1945         snd_assert(err >= 0, return -EINVAL);
1946
1947         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1948                                            hw->channels_min, hw->channels_max);
1949         snd_assert(err >= 0, return -EINVAL);
1950
1951         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1952                                            hw->rate_min, hw->rate_max);
1953         snd_assert(err >= 0, return -EINVAL);
1954
1955         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1956                                            hw->period_bytes_min, hw->period_bytes_max);
1957         snd_assert(err >= 0, return -EINVAL);
1958
1959         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1960                                            hw->periods_min, hw->periods_max);
1961         snd_assert(err >= 0, return -EINVAL);
1962
1963         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1964                                            hw->period_bytes_min, hw->buffer_bytes_max);
1965         snd_assert(err >= 0, return -EINVAL);
1966
1967         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
1968                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1969                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1970         if (err < 0)
1971                 return err;
1972
1973         /* FIXME: remove */
1974         if (runtime->dma_bytes) {
1975                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1976                 snd_assert(err >= 0, return -EINVAL);
1977         }
1978
1979         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1980                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1981                                           snd_pcm_hw_rule_rate, hw,
1982                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1983                 if (err < 0)
1984                         return err;
1985         }
1986
1987         /* FIXME: this belong to lowlevel */
1988         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
1989                                      1000000 / HZ, 1000000 / HZ);
1990         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1991
1992         return 0;
1993 }
1994
1995 static void pcm_release_private(struct snd_pcm_substream *substream)
1996 {
1997         snd_pcm_unlink(substream);
1998 }
1999
2000 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2001 {
2002         substream->ref_count--;
2003         if (substream->ref_count > 0)
2004                 return;
2005
2006         snd_pcm_drop(substream);
2007         if (substream->hw_opened) {
2008                 if (substream->ops->hw_free != NULL)
2009                         substream->ops->hw_free(substream);
2010                 substream->ops->close(substream);
2011                 substream->hw_opened = 0;
2012         }
2013         if (substream->pcm_release) {
2014                 substream->pcm_release(substream);
2015                 substream->pcm_release = NULL;
2016         }
2017         snd_pcm_detach_substream(substream);
2018 }
2019
2020 EXPORT_SYMBOL(snd_pcm_release_substream);
2021
2022 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2023                            struct file *file,
2024                            struct snd_pcm_substream **rsubstream)
2025 {
2026         struct snd_pcm_substream *substream;
2027         int err;
2028
2029         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2030         if (err < 0)
2031                 return err;
2032         if (substream->ref_count > 1) {
2033                 *rsubstream = substream;
2034                 return 0;
2035         }
2036
2037         err = snd_pcm_hw_constraints_init(substream);
2038         if (err < 0) {
2039                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2040                 goto error;
2041         }
2042
2043         if ((err = substream->ops->open(substream)) < 0)
2044                 goto error;
2045
2046         substream->hw_opened = 1;
2047
2048         err = snd_pcm_hw_constraints_complete(substream);
2049         if (err < 0) {
2050                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2051                 goto error;
2052         }
2053
2054         *rsubstream = substream;
2055         return 0;
2056
2057  error:
2058         snd_pcm_release_substream(substream);
2059         return err;
2060 }
2061
2062 EXPORT_SYMBOL(snd_pcm_open_substream);
2063
2064 static int snd_pcm_open_file(struct file *file,
2065                              struct snd_pcm *pcm,
2066                              int stream,
2067                              struct snd_pcm_file **rpcm_file)
2068 {
2069         struct snd_pcm_file *pcm_file;
2070         struct snd_pcm_substream *substream;
2071         struct snd_pcm_str *str;
2072         int err;
2073
2074         snd_assert(rpcm_file != NULL, return -EINVAL);
2075         *rpcm_file = NULL;
2076
2077         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2078         if (err < 0)
2079                 return err;
2080
2081         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2082         if (pcm_file == NULL) {
2083                 snd_pcm_release_substream(substream);
2084                 return -ENOMEM;
2085         }
2086         pcm_file->substream = substream;
2087         if (substream->ref_count == 1) {
2088                 str = substream->pstr;
2089                 substream->file = pcm_file;
2090                 substream->pcm_release = pcm_release_private;
2091         }
2092         file->private_data = pcm_file;
2093         *rpcm_file = pcm_file;
2094         return 0;
2095 }
2096
2097 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2098 {
2099         struct snd_pcm *pcm;
2100
2101         pcm = snd_lookup_minor_data(iminor(inode),
2102                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2103         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2104 }
2105
2106 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2107 {
2108         struct snd_pcm *pcm;
2109
2110         pcm = snd_lookup_minor_data(iminor(inode),
2111                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2112         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2113 }
2114
2115 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2116 {
2117         int err;
2118         struct snd_pcm_file *pcm_file;
2119         wait_queue_t wait;
2120
2121         if (pcm == NULL) {
2122                 err = -ENODEV;
2123                 goto __error1;
2124         }
2125         err = snd_card_file_add(pcm->card, file);
2126         if (err < 0)
2127                 goto __error1;
2128         if (!try_module_get(pcm->card->module)) {
2129                 err = -EFAULT;
2130                 goto __error2;
2131         }
2132         init_waitqueue_entry(&wait, current);
2133         add_wait_queue(&pcm->open_wait, &wait);
2134         mutex_lock(&pcm->open_mutex);
2135         while (1) {
2136                 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2137                 if (err >= 0)
2138                         break;
2139                 if (err == -EAGAIN) {
2140                         if (file->f_flags & O_NONBLOCK) {
2141                                 err = -EBUSY;
2142                                 break;
2143                         }
2144                 } else
2145                         break;
2146                 set_current_state(TASK_INTERRUPTIBLE);
2147                 mutex_unlock(&pcm->open_mutex);
2148                 schedule();
2149                 mutex_lock(&pcm->open_mutex);
2150                 if (signal_pending(current)) {
2151                         err = -ERESTARTSYS;
2152                         break;
2153                 }
2154         }
2155         remove_wait_queue(&pcm->open_wait, &wait);
2156         mutex_unlock(&pcm->open_mutex);
2157         if (err < 0)
2158                 goto __error;
2159         return err;
2160
2161       __error:
2162         module_put(pcm->card->module);
2163       __error2:
2164         snd_card_file_remove(pcm->card, file);
2165       __error1:
2166         return err;
2167 }
2168
2169 static int snd_pcm_release(struct inode *inode, struct file *file)
2170 {
2171         struct snd_pcm *pcm;
2172         struct snd_pcm_substream *substream;
2173         struct snd_pcm_file *pcm_file;
2174
2175         pcm_file = file->private_data;
2176         substream = pcm_file->substream;
2177         snd_assert(substream != NULL, return -ENXIO);
2178         pcm = substream->pcm;
2179         fasync_helper(-1, file, 0, &substream->runtime->fasync);
2180         mutex_lock(&pcm->open_mutex);
2181         snd_pcm_release_substream(substream);
2182         kfree(pcm_file);
2183         mutex_unlock(&pcm->open_mutex);
2184         wake_up(&pcm->open_wait);
2185         module_put(pcm->card->module);
2186         snd_card_file_remove(pcm->card, file);
2187         return 0;
2188 }
2189
2190 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2191                                                  snd_pcm_uframes_t frames)
2192 {
2193         struct snd_pcm_runtime *runtime = substream->runtime;
2194         snd_pcm_sframes_t appl_ptr;
2195         snd_pcm_sframes_t ret;
2196         snd_pcm_sframes_t hw_avail;
2197
2198         if (frames == 0)
2199                 return 0;
2200
2201         snd_pcm_stream_lock_irq(substream);
2202         switch (runtime->status->state) {
2203         case SNDRV_PCM_STATE_PREPARED:
2204                 break;
2205         case SNDRV_PCM_STATE_DRAINING:
2206         case SNDRV_PCM_STATE_RUNNING:
2207                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2208                         break;
2209                 /* Fall through */
2210         case SNDRV_PCM_STATE_XRUN:
2211                 ret = -EPIPE;
2212                 goto __end;
2213         default:
2214                 ret = -EBADFD;
2215                 goto __end;
2216         }
2217
2218         hw_avail = snd_pcm_playback_hw_avail(runtime);
2219         if (hw_avail <= 0) {
2220                 ret = 0;
2221                 goto __end;
2222         }
2223         if (frames > (snd_pcm_uframes_t)hw_avail)
2224                 frames = hw_avail;
2225         else
2226                 frames -= frames % runtime->xfer_align;
2227         appl_ptr = runtime->control->appl_ptr - frames;
2228         if (appl_ptr < 0)
2229                 appl_ptr += runtime->boundary;
2230         runtime->control->appl_ptr = appl_ptr;
2231         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2232             runtime->sleep_min)
2233                 snd_pcm_tick_prepare(substream);
2234         ret = frames;
2235  __end:
2236         snd_pcm_stream_unlock_irq(substream);
2237         return ret;
2238 }
2239
2240 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2241                                                 snd_pcm_uframes_t frames)
2242 {
2243         struct snd_pcm_runtime *runtime = substream->runtime;
2244         snd_pcm_sframes_t appl_ptr;
2245         snd_pcm_sframes_t ret;
2246         snd_pcm_sframes_t hw_avail;
2247
2248         if (frames == 0)
2249                 return 0;
2250
2251         snd_pcm_stream_lock_irq(substream);
2252         switch (runtime->status->state) {
2253         case SNDRV_PCM_STATE_PREPARED:
2254         case SNDRV_PCM_STATE_DRAINING:
2255                 break;
2256         case SNDRV_PCM_STATE_RUNNING:
2257                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2258                         break;
2259                 /* Fall through */
2260         case SNDRV_PCM_STATE_XRUN:
2261                 ret = -EPIPE;
2262                 goto __end;
2263         default:
2264                 ret = -EBADFD;
2265                 goto __end;
2266         }
2267
2268         hw_avail = snd_pcm_capture_hw_avail(runtime);
2269         if (hw_avail <= 0) {
2270                 ret = 0;
2271                 goto __end;
2272         }
2273         if (frames > (snd_pcm_uframes_t)hw_avail)
2274                 frames = hw_avail;
2275         else
2276                 frames -= frames % runtime->xfer_align;
2277         appl_ptr = runtime->control->appl_ptr - frames;
2278         if (appl_ptr < 0)
2279                 appl_ptr += runtime->boundary;
2280         runtime->control->appl_ptr = appl_ptr;
2281         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2282             runtime->sleep_min)
2283                 snd_pcm_tick_prepare(substream);
2284         ret = frames;
2285  __end:
2286         snd_pcm_stream_unlock_irq(substream);
2287         return ret;
2288 }
2289
2290 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2291                                                   snd_pcm_uframes_t frames)
2292 {
2293         struct snd_pcm_runtime *runtime = substream->runtime;
2294         snd_pcm_sframes_t appl_ptr;
2295         snd_pcm_sframes_t ret;
2296         snd_pcm_sframes_t avail;
2297
2298         if (frames == 0)
2299                 return 0;
2300
2301         snd_pcm_stream_lock_irq(substream);
2302         switch (runtime->status->state) {
2303         case SNDRV_PCM_STATE_PREPARED:
2304         case SNDRV_PCM_STATE_PAUSED:
2305                 break;
2306         case SNDRV_PCM_STATE_DRAINING:
2307         case SNDRV_PCM_STATE_RUNNING:
2308                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2309                         break;
2310                 /* Fall through */
2311         case SNDRV_PCM_STATE_XRUN:
2312                 ret = -EPIPE;
2313                 goto __end;
2314         default:
2315                 ret = -EBADFD;
2316                 goto __end;
2317         }
2318
2319         avail = snd_pcm_playback_avail(runtime);
2320         if (avail <= 0) {
2321                 ret = 0;
2322                 goto __end;
2323         }
2324         if (frames > (snd_pcm_uframes_t)avail)
2325                 frames = avail;
2326         else
2327                 frames -= frames % runtime->xfer_align;
2328         appl_ptr = runtime->control->appl_ptr + frames;
2329         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2330                 appl_ptr -= runtime->boundary;
2331         runtime->control->appl_ptr = appl_ptr;
2332         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2333             runtime->sleep_min)
2334                 snd_pcm_tick_prepare(substream);
2335         ret = frames;
2336  __end:
2337         snd_pcm_stream_unlock_irq(substream);
2338         return ret;
2339 }
2340
2341 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2342                                                  snd_pcm_uframes_t frames)
2343 {
2344         struct snd_pcm_runtime *runtime = substream->runtime;
2345         snd_pcm_sframes_t appl_ptr;
2346         snd_pcm_sframes_t ret;
2347         snd_pcm_sframes_t avail;
2348
2349         if (frames == 0)
2350                 return 0;
2351
2352         snd_pcm_stream_lock_irq(substream);
2353         switch (runtime->status->state) {
2354         case SNDRV_PCM_STATE_PREPARED:
2355         case SNDRV_PCM_STATE_DRAINING:
2356         case SNDRV_PCM_STATE_PAUSED:
2357                 break;
2358         case SNDRV_PCM_STATE_RUNNING:
2359                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2360                         break;
2361                 /* Fall through */
2362         case SNDRV_PCM_STATE_XRUN:
2363                 ret = -EPIPE;
2364                 goto __end;
2365         default:
2366                 ret = -EBADFD;
2367                 goto __end;
2368         }
2369
2370         avail = snd_pcm_capture_avail(runtime);
2371         if (avail <= 0) {
2372                 ret = 0;
2373                 goto __end;
2374         }
2375         if (frames > (snd_pcm_uframes_t)avail)
2376                 frames = avail;
2377         else
2378                 frames -= frames % runtime->xfer_align;
2379         appl_ptr = runtime->control->appl_ptr + frames;
2380         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2381                 appl_ptr -= runtime->boundary;
2382         runtime->control->appl_ptr = appl_ptr;
2383         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2384             runtime->sleep_min)
2385                 snd_pcm_tick_prepare(substream);
2386         ret = frames;
2387  __end:
2388         snd_pcm_stream_unlock_irq(substream);
2389         return ret;
2390 }
2391
2392 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2393 {
2394         struct snd_pcm_runtime *runtime = substream->runtime;
2395         int err;
2396
2397         snd_pcm_stream_lock_irq(substream);
2398         switch (runtime->status->state) {
2399         case SNDRV_PCM_STATE_DRAINING:
2400                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2401                         goto __badfd;
2402         case SNDRV_PCM_STATE_RUNNING:
2403                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2404                         break;
2405                 /* Fall through */
2406         case SNDRV_PCM_STATE_PREPARED:
2407         case SNDRV_PCM_STATE_SUSPENDED:
2408                 err = 0;
2409                 break;
2410         case SNDRV_PCM_STATE_XRUN:
2411                 err = -EPIPE;
2412                 break;
2413         default:
2414               __badfd:
2415                 err = -EBADFD;
2416                 break;
2417         }
2418         snd_pcm_stream_unlock_irq(substream);
2419         return err;
2420 }
2421                 
2422 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2423                          snd_pcm_sframes_t __user *res)
2424 {
2425         struct snd_pcm_runtime *runtime = substream->runtime;
2426         int err;
2427         snd_pcm_sframes_t n = 0;
2428
2429         snd_pcm_stream_lock_irq(substream);
2430         switch (runtime->status->state) {
2431         case SNDRV_PCM_STATE_DRAINING:
2432                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2433                         goto __badfd;
2434         case SNDRV_PCM_STATE_RUNNING:
2435                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2436                         break;
2437                 /* Fall through */
2438         case SNDRV_PCM_STATE_PREPARED:
2439         case SNDRV_PCM_STATE_SUSPENDED:
2440                 err = 0;
2441                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2442                         n = snd_pcm_playback_hw_avail(runtime);
2443                 else
2444                         n = snd_pcm_capture_avail(runtime);
2445                 break;
2446         case SNDRV_PCM_STATE_XRUN:
2447                 err = -EPIPE;
2448                 break;
2449         default:
2450               __badfd:
2451                 err = -EBADFD;
2452                 break;
2453         }
2454         snd_pcm_stream_unlock_irq(substream);
2455         if (!err)
2456                 if (put_user(n, res))
2457                         err = -EFAULT;
2458         return err;
2459 }
2460                 
2461 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2462                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2463 {
2464         struct snd_pcm_runtime *runtime = substream->runtime;
2465         struct snd_pcm_sync_ptr sync_ptr;
2466         volatile struct snd_pcm_mmap_status *status;
2467         volatile struct snd_pcm_mmap_control *control;
2468         int err;
2469
2470         memset(&sync_ptr, 0, sizeof(sync_ptr));
2471         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2472                 return -EFAULT;
2473         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2474                 return -EFAULT; 
2475         status = runtime->status;
2476         control = runtime->control;
2477         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2478                 err = snd_pcm_hwsync(substream);
2479                 if (err < 0)
2480                         return err;
2481         }
2482         snd_pcm_stream_lock_irq(substream);
2483         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2484                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2485         else
2486                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2487         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2488                 control->avail_min = sync_ptr.c.control.avail_min;
2489         else
2490                 sync_ptr.c.control.avail_min = control->avail_min;
2491         sync_ptr.s.status.state = status->state;
2492         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2493         sync_ptr.s.status.tstamp = status->tstamp;
2494         sync_ptr.s.status.suspended_state = status->suspended_state;
2495         snd_pcm_stream_unlock_irq(substream);
2496         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2497                 return -EFAULT;
2498         return 0;
2499 }
2500                 
2501 static int snd_pcm_common_ioctl1(struct file *file,
2502                                  struct snd_pcm_substream *substream,
2503                                  unsigned int cmd, void __user *arg)
2504 {
2505         snd_assert(substream != NULL, return -ENXIO);
2506
2507         switch (cmd) {
2508         case SNDRV_PCM_IOCTL_PVERSION:
2509                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2510         case SNDRV_PCM_IOCTL_INFO:
2511                 return snd_pcm_info_user(substream, arg);
2512         case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2513                 return 0;
2514         case SNDRV_PCM_IOCTL_HW_REFINE:
2515                 return snd_pcm_hw_refine_user(substream, arg);
2516         case SNDRV_PCM_IOCTL_HW_PARAMS:
2517                 return snd_pcm_hw_params_user(substream, arg);
2518         case SNDRV_PCM_IOCTL_HW_FREE:
2519                 return snd_pcm_hw_free(substream);
2520         case SNDRV_PCM_IOCTL_SW_PARAMS:
2521                 return snd_pcm_sw_params_user(substream, arg);
2522         case SNDRV_PCM_IOCTL_STATUS:
2523                 return snd_pcm_status_user(substream, arg);
2524         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2525                 return snd_pcm_channel_info_user(substream, arg);
2526         case SNDRV_PCM_IOCTL_PREPARE:
2527                 return snd_pcm_prepare(substream, file);
2528         case SNDRV_PCM_IOCTL_RESET:
2529                 return snd_pcm_reset(substream);
2530         case SNDRV_PCM_IOCTL_START:
2531                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2532         case SNDRV_PCM_IOCTL_LINK:
2533                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2534         case SNDRV_PCM_IOCTL_UNLINK:
2535                 return snd_pcm_unlink(substream);
2536         case SNDRV_PCM_IOCTL_RESUME:
2537                 return snd_pcm_resume(substream);
2538         case SNDRV_PCM_IOCTL_XRUN:
2539                 return snd_pcm_xrun(substream);
2540         case SNDRV_PCM_IOCTL_HWSYNC:
2541                 return snd_pcm_hwsync(substream);
2542         case SNDRV_PCM_IOCTL_DELAY:
2543                 return snd_pcm_delay(substream, arg);
2544         case SNDRV_PCM_IOCTL_SYNC_PTR:
2545                 return snd_pcm_sync_ptr(substream, arg);
2546 #ifdef CONFIG_SND_SUPPORT_OLD_API
2547         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2548                 return snd_pcm_hw_refine_old_user(substream, arg);
2549         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2550                 return snd_pcm_hw_params_old_user(substream, arg);
2551 #endif
2552         case SNDRV_PCM_IOCTL_DRAIN:
2553                 return snd_pcm_drain(substream);
2554         case SNDRV_PCM_IOCTL_DROP:
2555                 return snd_pcm_drop(substream);
2556         case SNDRV_PCM_IOCTL_PAUSE:
2557         {
2558                 int res;
2559                 snd_pcm_stream_lock_irq(substream);
2560                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2561                 snd_pcm_stream_unlock_irq(substream);
2562                 return res;
2563         }
2564         }
2565         snd_printd("unknown ioctl = 0x%x\n", cmd);
2566         return -ENOTTY;
2567 }
2568
2569 static int snd_pcm_playback_ioctl1(struct file *file,
2570                                    struct snd_pcm_substream *substream,
2571                                    unsigned int cmd, void __user *arg)
2572 {
2573         snd_assert(substream != NULL, return -ENXIO);
2574         snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2575         switch (cmd) {
2576         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2577         {
2578                 struct snd_xferi xferi;
2579                 struct snd_xferi __user *_xferi = arg;
2580                 struct snd_pcm_runtime *runtime = substream->runtime;
2581                 snd_pcm_sframes_t result;
2582                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2583                         return -EBADFD;
2584                 if (put_user(0, &_xferi->result))
2585                         return -EFAULT;
2586                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2587                         return -EFAULT;
2588                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2589                 __put_user(result, &_xferi->result);
2590                 return result < 0 ? result : 0;
2591         }
2592         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2593         {
2594                 struct snd_xfern xfern;
2595                 struct snd_xfern __user *_xfern = arg;
2596                 struct snd_pcm_runtime *runtime = substream->runtime;
2597                 void __user **bufs;
2598                 snd_pcm_sframes_t result;
2599                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2600                         return -EBADFD;
2601                 if (runtime->channels > 128)
2602                         return -EINVAL;
2603                 if (put_user(0, &_xfern->result))
2604                         return -EFAULT;
2605                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2606                         return -EFAULT;
2607                 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2608                 if (bufs == NULL)
2609                         return -ENOMEM;
2610                 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2611                         kfree(bufs);
2612                         return -EFAULT;
2613                 }
2614                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2615                 kfree(bufs);
2616                 __put_user(result, &_xfern->result);
2617                 return result < 0 ? result : 0;
2618         }
2619         case SNDRV_PCM_IOCTL_REWIND:
2620         {
2621                 snd_pcm_uframes_t frames;
2622                 snd_pcm_uframes_t __user *_frames = arg;
2623                 snd_pcm_sframes_t result;
2624                 if (get_user(frames, _frames))
2625                         return -EFAULT;
2626                 if (put_user(0, _frames))
2627                         return -EFAULT;
2628                 result = snd_pcm_playback_rewind(substream, frames);
2629                 __put_user(result, _frames);
2630                 return result < 0 ? result : 0;
2631         }
2632         case SNDRV_PCM_IOCTL_FORWARD:
2633         {
2634                 snd_pcm_uframes_t frames;
2635                 snd_pcm_uframes_t __user *_frames = arg;
2636                 snd_pcm_sframes_t result;
2637                 if (get_user(frames, _frames))
2638                         return -EFAULT;
2639                 if (put_user(0, _frames))
2640                         return -EFAULT;
2641                 result = snd_pcm_playback_forward(substream, frames);
2642                 __put_user(result, _frames);
2643                 return result < 0 ? result : 0;
2644         }
2645         }
2646         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2647 }
2648
2649 static int snd_pcm_capture_ioctl1(struct file *file,
2650                                   struct snd_pcm_substream *substream,
2651                                   unsigned int cmd, void __user *arg)
2652 {
2653         snd_assert(substream != NULL, return -ENXIO);
2654         snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2655         switch (cmd) {
2656         case SNDRV_PCM_IOCTL_READI_FRAMES:
2657         {
2658                 struct snd_xferi xferi;
2659                 struct snd_xferi __user *_xferi = arg;
2660                 struct snd_pcm_runtime *runtime = substream->runtime;
2661                 snd_pcm_sframes_t result;
2662                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2663                         return -EBADFD;
2664                 if (put_user(0, &_xferi->result))
2665                         return -EFAULT;
2666                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2667                         return -EFAULT;
2668                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2669                 __put_user(result, &_xferi->result);
2670                 return result < 0 ? result : 0;
2671         }
2672         case SNDRV_PCM_IOCTL_READN_FRAMES:
2673         {
2674                 struct snd_xfern xfern;
2675                 struct snd_xfern __user *_xfern = arg;
2676                 struct snd_pcm_runtime *runtime = substream->runtime;
2677                 void *bufs;
2678                 snd_pcm_sframes_t result;
2679                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2680                         return -EBADFD;
2681                 if (runtime->channels > 128)
2682                         return -EINVAL;
2683                 if (put_user(0, &_xfern->result))
2684                         return -EFAULT;
2685                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2686                         return -EFAULT;
2687                 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2688                 if (bufs == NULL)
2689                         return -ENOMEM;
2690                 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2691                         kfree(bufs);
2692                         return -EFAULT;
2693                 }
2694                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2695                 kfree(bufs);
2696                 __put_user(result, &_xfern->result);
2697                 return result < 0 ? result : 0;
2698         }
2699         case SNDRV_PCM_IOCTL_REWIND:
2700         {
2701                 snd_pcm_uframes_t frames;
2702                 snd_pcm_uframes_t __user *_frames = arg;
2703                 snd_pcm_sframes_t result;
2704                 if (get_user(frames, _frames))
2705                         return -EFAULT;
2706                 if (put_user(0, _frames))
2707                         return -EFAULT;
2708                 result = snd_pcm_capture_rewind(substream, frames);
2709                 __put_user(result, _frames);
2710                 return result < 0 ? result : 0;
2711         }
2712         case SNDRV_PCM_IOCTL_FORWARD:
2713         {
2714                 snd_pcm_uframes_t frames;
2715                 snd_pcm_uframes_t __user *_frames = arg;
2716                 snd_pcm_sframes_t result;
2717                 if (get_user(frames, _frames))
2718                         return -EFAULT;
2719                 if (put_user(0, _frames))
2720                         return -EFAULT;
2721                 result = snd_pcm_capture_forward(substream, frames);
2722                 __put_user(result, _frames);
2723                 return result < 0 ? result : 0;
2724         }
2725         }
2726         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2727 }
2728
2729 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2730                                    unsigned long arg)
2731 {
2732         struct snd_pcm_file *pcm_file;
2733
2734         pcm_file = file->private_data;
2735
2736         if (((cmd >> 8) & 0xff) != 'A')
2737                 return -ENOTTY;
2738
2739         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2740                                        (void __user *)arg);
2741 }
2742
2743 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2744                                   unsigned long arg)
2745 {
2746         struct snd_pcm_file *pcm_file;
2747
2748         pcm_file = file->private_data;
2749
2750         if (((cmd >> 8) & 0xff) != 'A')
2751                 return -ENOTTY;
2752
2753         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2754                                       (void __user *)arg);
2755 }
2756
2757 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2758                          unsigned int cmd, void *arg)
2759 {
2760         mm_segment_t fs;
2761         int result;
2762         
2763         fs = snd_enter_user();
2764         switch (substream->stream) {
2765         case SNDRV_PCM_STREAM_PLAYBACK:
2766                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2767                                                  (void __user *)arg);
2768                 break;
2769         case SNDRV_PCM_STREAM_CAPTURE:
2770                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2771                                                 (void __user *)arg);
2772                 break;
2773         default:
2774                 result = -EINVAL;
2775                 break;
2776         }
2777         snd_leave_user(fs);
2778         return result;
2779 }
2780
2781 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2782
2783 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2784                             loff_t * offset)
2785 {
2786         struct snd_pcm_file *pcm_file;
2787         struct snd_pcm_substream *substream;
2788         struct snd_pcm_runtime *runtime;
2789         snd_pcm_sframes_t result;
2790
2791         pcm_file = file->private_data;
2792         substream = pcm_file->substream;
2793         snd_assert(substream != NULL, return -ENXIO);
2794         runtime = substream->runtime;
2795         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2796                 return -EBADFD;
2797         if (!frame_aligned(runtime, count))
2798                 return -EINVAL;
2799         count = bytes_to_frames(runtime, count);
2800         result = snd_pcm_lib_read(substream, buf, count);
2801         if (result > 0)
2802                 result = frames_to_bytes(runtime, result);
2803         return result;
2804 }
2805
2806 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2807                              size_t count, loff_t * offset)
2808 {
2809         struct snd_pcm_file *pcm_file;
2810         struct snd_pcm_substream *substream;
2811         struct snd_pcm_runtime *runtime;
2812         snd_pcm_sframes_t result;
2813
2814         pcm_file = file->private_data;
2815         substream = pcm_file->substream;
2816         snd_assert(substream != NULL, result = -ENXIO; goto end);
2817         runtime = substream->runtime;
2818         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2819                 result = -EBADFD;
2820                 goto end;
2821         }
2822         if (!frame_aligned(runtime, count)) {
2823                 result = -EINVAL;
2824                 goto end;
2825         }
2826         count = bytes_to_frames(runtime, count);
2827         result = snd_pcm_lib_write(substream, buf, count);
2828         if (result > 0)
2829                 result = frames_to_bytes(runtime, result);
2830  end:
2831         return result;
2832 }
2833
2834 static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector,
2835                              unsigned long count, loff_t * offset)
2836
2837 {
2838         struct snd_pcm_file *pcm_file;
2839         struct snd_pcm_substream *substream;
2840         struct snd_pcm_runtime *runtime;
2841         snd_pcm_sframes_t result;
2842         unsigned long i;
2843         void __user **bufs;
2844         snd_pcm_uframes_t frames;
2845
2846         pcm_file = file->private_data;
2847         substream = pcm_file->substream;
2848         snd_assert(substream != NULL, return -ENXIO);
2849         runtime = substream->runtime;
2850         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2851                 return -EBADFD;
2852         if (count > 1024 || count != runtime->channels)
2853                 return -EINVAL;
2854         if (!frame_aligned(runtime, _vector->iov_len))
2855                 return -EINVAL;
2856         frames = bytes_to_samples(runtime, _vector->iov_len);
2857         bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2858         if (bufs == NULL)
2859                 return -ENOMEM;
2860         for (i = 0; i < count; ++i)
2861                 bufs[i] = _vector[i].iov_base;
2862         result = snd_pcm_lib_readv(substream, bufs, frames);
2863         if (result > 0)
2864                 result = frames_to_bytes(runtime, result);
2865         kfree(bufs);
2866         return result;
2867 }
2868
2869 static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector,
2870                               unsigned long count, loff_t * offset)
2871 {
2872         struct snd_pcm_file *pcm_file;
2873         struct snd_pcm_substream *substream;
2874         struct snd_pcm_runtime *runtime;
2875         snd_pcm_sframes_t result;
2876         unsigned long i;
2877         void __user **bufs;
2878         snd_pcm_uframes_t frames;
2879
2880         pcm_file = file->private_data;
2881         substream = pcm_file->substream;
2882         snd_assert(substream != NULL, result = -ENXIO; goto end);
2883         runtime = substream->runtime;
2884         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2885                 result = -EBADFD;
2886                 goto end;
2887         }
2888         if (count > 128 || count != runtime->channels ||
2889             !frame_aligned(runtime, _vector->iov_len)) {
2890                 result = -EINVAL;
2891                 goto end;
2892         }
2893         frames = bytes_to_samples(runtime, _vector->iov_len);
2894         bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2895         if (bufs == NULL)
2896                 return -ENOMEM;
2897         for (i = 0; i < count; ++i)
2898                 bufs[i] = _vector[i].iov_base;
2899         result = snd_pcm_lib_writev(substream, bufs, frames);
2900         if (result > 0)
2901                 result = frames_to_bytes(runtime, result);
2902         kfree(bufs);
2903  end:
2904         return result;
2905 }
2906
2907 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2908 {
2909         struct snd_pcm_file *pcm_file;
2910         struct snd_pcm_substream *substream;
2911         struct snd_pcm_runtime *runtime;
2912         unsigned int mask;
2913         snd_pcm_uframes_t avail;
2914
2915         pcm_file = file->private_data;
2916
2917         substream = pcm_file->substream;
2918         snd_assert(substream != NULL, return -ENXIO);
2919         runtime = substream->runtime;
2920
2921         poll_wait(file, &runtime->sleep, wait);
2922
2923         snd_pcm_stream_lock_irq(substream);
2924         avail = snd_pcm_playback_avail(runtime);
2925         switch (runtime->status->state) {
2926         case SNDRV_PCM_STATE_RUNNING:
2927         case SNDRV_PCM_STATE_PREPARED:
2928         case SNDRV_PCM_STATE_PAUSED:
2929                 if (avail >= runtime->control->avail_min) {
2930                         mask = POLLOUT | POLLWRNORM;
2931                         break;
2932                 }
2933                 /* Fall through */
2934         case SNDRV_PCM_STATE_DRAINING:
2935                 mask = 0;
2936                 break;
2937         default:
2938                 mask = POLLOUT | POLLWRNORM | POLLERR;
2939                 break;
2940         }
2941         snd_pcm_stream_unlock_irq(substream);
2942         return mask;
2943 }
2944
2945 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2946 {
2947         struct snd_pcm_file *pcm_file;
2948         struct snd_pcm_substream *substream;
2949         struct snd_pcm_runtime *runtime;
2950         unsigned int mask;
2951         snd_pcm_uframes_t avail;
2952
2953         pcm_file = file->private_data;
2954
2955         substream = pcm_file->substream;
2956         snd_assert(substream != NULL, return -ENXIO);
2957         runtime = substream->runtime;
2958
2959         poll_wait(file, &runtime->sleep, wait);
2960
2961         snd_pcm_stream_lock_irq(substream);
2962         avail = snd_pcm_capture_avail(runtime);
2963         switch (runtime->status->state) {
2964         case SNDRV_PCM_STATE_RUNNING:
2965         case SNDRV_PCM_STATE_PREPARED:
2966         case SNDRV_PCM_STATE_PAUSED:
2967                 if (avail >= runtime->control->avail_min) {
2968                         mask = POLLIN | POLLRDNORM;
2969                         break;
2970                 }
2971                 mask = 0;
2972                 break;
2973         case SNDRV_PCM_STATE_DRAINING:
2974                 if (avail > 0) {
2975                         mask = POLLIN | POLLRDNORM;
2976                         break;
2977                 }
2978                 /* Fall through */
2979         default:
2980                 mask = POLLIN | POLLRDNORM | POLLERR;
2981                 break;
2982         }
2983         snd_pcm_stream_unlock_irq(substream);
2984         return mask;
2985 }
2986
2987 /*
2988  * mmap support
2989  */
2990
2991 /*
2992  * Only on coherent architectures, we can mmap the status and the control records
2993  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
2994  */
2995 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2996 /*
2997  * mmap status record
2998  */
2999 static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area,
3000                                                 unsigned long address, int *type)
3001 {
3002         struct snd_pcm_substream *substream = area->vm_private_data;
3003         struct snd_pcm_runtime *runtime;
3004         struct page * page;
3005         
3006         if (substream == NULL)
3007                 return NOPAGE_OOM;
3008         runtime = substream->runtime;
3009         page = virt_to_page(runtime->status);
3010         get_page(page);
3011         if (type)
3012                 *type = VM_FAULT_MINOR;
3013         return page;
3014 }
3015
3016 static struct vm_operations_struct snd_pcm_vm_ops_status =
3017 {
3018         .nopage =       snd_pcm_mmap_status_nopage,
3019 };
3020
3021 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3022                                struct vm_area_struct *area)
3023 {
3024         struct snd_pcm_runtime *runtime;
3025         long size;
3026         if (!(area->vm_flags & VM_READ))
3027                 return -EINVAL;
3028         runtime = substream->runtime;
3029         snd_assert(runtime != NULL, return -EAGAIN);
3030         size = area->vm_end - area->vm_start;
3031         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3032                 return -EINVAL;
3033         area->vm_ops = &snd_pcm_vm_ops_status;
3034         area->vm_private_data = substream;
3035         area->vm_flags |= VM_RESERVED;
3036         return 0;
3037 }
3038
3039 /*
3040  * mmap control record
3041  */
3042 static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area,
3043                                                  unsigned long address, int *type)
3044 {
3045         struct snd_pcm_substream *substream = area->vm_private_data;
3046         struct snd_pcm_runtime *runtime;
3047         struct page * page;
3048         
3049         if (substream == NULL)
3050                 return NOPAGE_OOM;
3051         runtime = substream->runtime;
3052         page = virt_to_page(runtime->control);
3053         get_page(page);
3054         if (type)
3055                 *type = VM_FAULT_MINOR;
3056         return page;
3057 }
3058
3059 static struct vm_operations_struct snd_pcm_vm_ops_control =
3060 {
3061         .nopage =       snd_pcm_mmap_control_nopage,
3062 };
3063
3064 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3065                                 struct vm_area_struct *area)
3066 {
3067         struct snd_pcm_runtime *runtime;
3068         long size;
3069         if (!(area->vm_flags & VM_READ))
3070                 return -EINVAL;
3071         runtime = substream->runtime;
3072         snd_assert(runtime != NULL, return -EAGAIN);
3073         size = area->vm_end - area->vm_start;
3074         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3075                 return -EINVAL;
3076         area->vm_ops = &snd_pcm_vm_ops_control;
3077         area->vm_private_data = substream;
3078         area->vm_flags |= VM_RESERVED;
3079         return 0;
3080 }
3081 #else /* ! coherent mmap */
3082 /*
3083  * don't support mmap for status and control records.
3084  */
3085 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3086                                struct vm_area_struct *area)
3087 {
3088         return -ENXIO;
3089 }
3090 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3091                                 struct vm_area_struct *area)
3092 {
3093         return -ENXIO;
3094 }
3095 #endif /* coherent mmap */
3096
3097 /*
3098  * nopage callback for mmapping a RAM page
3099  */
3100 static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area,
3101                                              unsigned long address, int *type)
3102 {
3103         struct snd_pcm_substream *substream = area->vm_private_data;
3104         struct snd_pcm_runtime *runtime;
3105         unsigned long offset;
3106         struct page * page;
3107         void *vaddr;
3108         size_t dma_bytes;
3109         
3110         if (substream == NULL)
3111                 return NOPAGE_OOM;
3112         runtime = substream->runtime;
3113         offset = area->vm_pgoff << PAGE_SHIFT;
3114         offset += address - area->vm_start;
3115         snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
3116         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3117         if (offset > dma_bytes - PAGE_SIZE)
3118                 return NOPAGE_SIGBUS;
3119         if (substream->ops->page) {
3120                 page = substream->ops->page(substream, offset);
3121                 if (! page)
3122                         return NOPAGE_OOM;
3123         } else {
3124                 vaddr = runtime->dma_area + offset;
3125                 page = virt_to_page(vaddr);
3126         }
3127         get_page(page);
3128         if (type)
3129                 *type = VM_FAULT_MINOR;
3130         return page;
3131 }
3132
3133 static struct vm_operations_struct snd_pcm_vm_ops_data =
3134 {
3135         .open =         snd_pcm_mmap_data_open,
3136         .close =        snd_pcm_mmap_data_close,
3137         .nopage =       snd_pcm_mmap_data_nopage,
3138 };
3139
3140 /*
3141  * mmap the DMA buffer on RAM
3142  */
3143 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3144                                 struct vm_area_struct *area)
3145 {
3146         area->vm_ops = &snd_pcm_vm_ops_data;
3147         area->vm_private_data = substream;
3148         area->vm_flags |= VM_RESERVED;
3149         atomic_inc(&substream->mmap_count);
3150         return 0;
3151 }
3152
3153 /*
3154  * mmap the DMA buffer on I/O memory area
3155  */
3156 #if SNDRV_PCM_INFO_MMAP_IOMEM
3157 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3158 {
3159         .open =         snd_pcm_mmap_data_open,
3160         .close =        snd_pcm_mmap_data_close,
3161 };
3162
3163 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3164                            struct vm_area_struct *area)
3165 {
3166         long size;
3167         unsigned long offset;
3168
3169 #ifdef pgprot_noncached
3170         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3171 #endif
3172         area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3173         area->vm_private_data = substream;
3174         area->vm_flags |= VM_IO;
3175         size = area->vm_end - area->vm_start;
3176         offset = area->vm_pgoff << PAGE_SHIFT;
3177         if (io_remap_pfn_range(area, area->vm_start,
3178                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3179                                 size, area->vm_page_prot))
3180                 return -EAGAIN;
3181         atomic_inc(&substream->mmap_count);
3182         return 0;
3183 }
3184
3185 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3186 #endif /* SNDRV_PCM_INFO_MMAP */
3187
3188 /*
3189  * mmap DMA buffer
3190  */
3191 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3192                       struct vm_area_struct *area)
3193 {
3194         struct snd_pcm_runtime *runtime;
3195         long size;
3196         unsigned long offset;
3197         size_t dma_bytes;
3198
3199         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3200                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3201                         return -EINVAL;
3202         } else {
3203                 if (!(area->vm_flags & VM_READ))
3204                         return -EINVAL;
3205         }
3206         runtime = substream->runtime;
3207         snd_assert(runtime != NULL, return -EAGAIN);
3208         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3209                 return -EBADFD;
3210         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3211                 return -ENXIO;
3212         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3213             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3214                 return -EINVAL;
3215         size = area->vm_end - area->vm_start;
3216         offset = area->vm_pgoff << PAGE_SHIFT;
3217         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3218         if ((size_t)size > dma_bytes)
3219                 return -EINVAL;
3220         if (offset > dma_bytes - size)
3221                 return -EINVAL;
3222
3223         if (substream->ops->mmap)
3224                 return substream->ops->mmap(substream, area);
3225         else
3226                 return snd_pcm_default_mmap(substream, area);
3227 }
3228
3229 EXPORT_SYMBOL(snd_pcm_mmap_data);
3230
3231 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3232 {
3233         struct snd_pcm_file * pcm_file;
3234         struct snd_pcm_substream *substream;    
3235         unsigned long offset;
3236         
3237         pcm_file = file->private_data;
3238         substream = pcm_file->substream;
3239         snd_assert(substream != NULL, return -ENXIO);
3240
3241         offset = area->vm_pgoff << PAGE_SHIFT;
3242         switch (offset) {
3243         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3244                 if (pcm_file->no_compat_mmap)
3245                         return -ENXIO;
3246                 return snd_pcm_mmap_status(substream, file, area);
3247         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3248                 if (pcm_file->no_compat_mmap)
3249                         return -ENXIO;
3250                 return snd_pcm_mmap_control(substream, file, area);
3251         default:
3252                 return snd_pcm_mmap_data(substream, file, area);
3253         }
3254         return 0;
3255 }
3256
3257 static int snd_pcm_fasync(int fd, struct file * file, int on)
3258 {
3259         struct snd_pcm_file * pcm_file;
3260         struct snd_pcm_substream *substream;
3261         struct snd_pcm_runtime *runtime;
3262         int err;
3263
3264         pcm_file = file->private_data;
3265         substream = pcm_file->substream;
3266         snd_assert(substream != NULL, return -ENXIO);
3267         runtime = substream->runtime;
3268
3269         err = fasync_helper(fd, file, on, &runtime->fasync);
3270         if (err < 0)
3271                 return err;
3272         return 0;
3273 }
3274
3275 /*
3276  * ioctl32 compat
3277  */
3278 #ifdef CONFIG_COMPAT
3279 #include "pcm_compat.c"
3280 #else
3281 #define snd_pcm_ioctl_compat    NULL
3282 #endif
3283
3284 /*
3285  *  To be removed helpers to keep binary compatibility
3286  */
3287
3288 #ifdef CONFIG_SND_SUPPORT_OLD_API
3289 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3290 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3291
3292 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3293                                                struct snd_pcm_hw_params_old *oparams)
3294 {
3295         unsigned int i;
3296
3297         memset(params, 0, sizeof(*params));
3298         params->flags = oparams->flags;
3299         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3300                 params->masks[i].bits[0] = oparams->masks[i];
3301         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3302         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3303         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3304         params->info = oparams->info;
3305         params->msbits = oparams->msbits;
3306         params->rate_num = oparams->rate_num;
3307         params->rate_den = oparams->rate_den;
3308         params->fifo_size = oparams->fifo_size;
3309 }
3310
3311 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3312                                              struct snd_pcm_hw_params *params)
3313 {
3314         unsigned int i;
3315
3316         memset(oparams, 0, sizeof(*oparams));
3317         oparams->flags = params->flags;
3318         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3319                 oparams->masks[i] = params->masks[i].bits[0];
3320         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3321         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3322         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3323         oparams->info = params->info;
3324         oparams->msbits = params->msbits;
3325         oparams->rate_num = params->rate_num;
3326         oparams->rate_den = params->rate_den;
3327         oparams->fifo_size = params->fifo_size;
3328 }
3329
3330 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3331                                       struct snd_pcm_hw_params_old __user * _oparams)
3332 {
3333         struct snd_pcm_hw_params *params;
3334         struct snd_pcm_hw_params_old *oparams = NULL;
3335         int err;
3336
3337         params = kmalloc(sizeof(*params), GFP_KERNEL);
3338         if (!params) {
3339                 err = -ENOMEM;
3340                 goto out;
3341         }
3342         oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3343         if (!oparams) {
3344                 err = -ENOMEM;
3345                 goto out;
3346         }
3347
3348         if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3349                 err = -EFAULT;
3350                 goto out;
3351         }
3352         snd_pcm_hw_convert_from_old_params(params, oparams);
3353         err = snd_pcm_hw_refine(substream, params);
3354         snd_pcm_hw_convert_to_old_params(oparams, params);
3355         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3356                 if (!err)
3357                         err = -EFAULT;
3358         }
3359 out:
3360         kfree(params);
3361         kfree(oparams);
3362         return err;
3363 }
3364
3365 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3366                                       struct snd_pcm_hw_params_old __user * _oparams)
3367 {
3368         struct snd_pcm_hw_params *params;
3369         struct snd_pcm_hw_params_old *oparams = NULL;
3370         int err;
3371
3372         params = kmalloc(sizeof(*params), GFP_KERNEL);
3373         if (!params) {
3374                 err = -ENOMEM;
3375                 goto out;
3376         }
3377         oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3378         if (!oparams) {
3379                 err = -ENOMEM;
3380                 goto out;
3381         }
3382         if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3383                 err = -EFAULT;
3384                 goto out;
3385         }
3386         snd_pcm_hw_convert_from_old_params(params, oparams);
3387         err = snd_pcm_hw_params(substream, params);
3388         snd_pcm_hw_convert_to_old_params(oparams, params);
3389         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3390                 if (!err)
3391                         err = -EFAULT;
3392         }
3393 out:
3394         kfree(params);
3395         kfree(oparams);
3396         return err;
3397 }
3398 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3399
3400 /*
3401  *  Register section
3402  */
3403
3404 struct file_operations snd_pcm_f_ops[2] = {
3405         {
3406                 .owner =                THIS_MODULE,
3407                 .write =                snd_pcm_write,
3408                 .writev =               snd_pcm_writev,
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         },
3417         {
3418                 .owner =                THIS_MODULE,
3419                 .read =                 snd_pcm_read,
3420                 .readv =                snd_pcm_readv,
3421                 .open =                 snd_pcm_capture_open,
3422                 .release =              snd_pcm_release,
3423                 .poll =                 snd_pcm_capture_poll,
3424                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3425                 .compat_ioctl =         snd_pcm_ioctl_compat,
3426                 .mmap =                 snd_pcm_mmap,
3427                 .fasync =               snd_pcm_fasync,
3428         }
3429 };