Merge branch 'linux-3.4.57' into rel-17
[linux-2.6.git] / sound / core / pcm_native.c
1 /*
2  *  Digital Audio (PCM) abstract layer
3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4  *
5  *
6  *   This program is free software; you can redistribute it and/or modify
7  *   it under the terms of the GNU General Public License as published by
8  *   the Free Software Foundation; either version 2 of the License, or
9  *   (at your option) any later version.
10  *
11  *   This program is distributed in the hope that it will be useful,
12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *   GNU General Public License for more details.
15  *
16  *   You should have received a copy of the GNU General Public License
17  *   along with this program; if not, write to the Free Software
18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
19  *
20  */
21
22 #include <linux/mm.h>
23 #include <linux/module.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos.h>
28 #include <linux/uio.h>
29 #include <linux/dma-mapping.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/info.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/timer.h>
36 #include <sound/minors.h>
37 #include <asm/io.h>
38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
39 #include <dma-coherence.h>
40 #endif
41
42 /*
43  *  Compatibility
44  */
45
46 struct snd_pcm_hw_params_old {
47         unsigned int flags;
48         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
49                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
50         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
51                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
52         unsigned int rmask;
53         unsigned int cmask;
54         unsigned int info;
55         unsigned int msbits;
56         unsigned int rate_num;
57         unsigned int rate_den;
58         snd_pcm_uframes_t fifo_size;
59         unsigned char reserved[64];
60 };
61
62 #ifdef CONFIG_SND_SUPPORT_OLD_API
63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
65
66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
67                                       struct snd_pcm_hw_params_old __user * _oparams);
68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
69                                       struct snd_pcm_hw_params_old __user * _oparams);
70 #endif
71 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
72
73 /*
74  *
75  */
76
77 DEFINE_RWLOCK(snd_pcm_link_rwlock);
78 EXPORT_SYMBOL(snd_pcm_link_rwlock);
79
80 static DECLARE_RWSEM(snd_pcm_link_rwsem);
81
82 static inline mm_segment_t snd_enter_user(void)
83 {
84         mm_segment_t fs = get_fs();
85         set_fs(get_ds());
86         return fs;
87 }
88
89 static inline void snd_leave_user(mm_segment_t fs)
90 {
91         set_fs(fs);
92 }
93
94
95
96 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
97 {
98         struct snd_pcm_runtime *runtime;
99         struct snd_pcm *pcm = substream->pcm;
100         struct snd_pcm_str *pstr = substream->pstr;
101
102         memset(info, 0, sizeof(*info));
103         info->card = pcm->card->number;
104         info->device = pcm->device;
105         info->stream = substream->stream;
106         info->subdevice = substream->number;
107         strlcpy(info->id, pcm->id, sizeof(info->id));
108         strlcpy(info->name, pcm->name, sizeof(info->name));
109         info->dev_class = pcm->dev_class;
110         info->dev_subclass = pcm->dev_subclass;
111         info->subdevices_count = pstr->substream_count;
112         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
113         strlcpy(info->subname, substream->name, sizeof(info->subname));
114         runtime = substream->runtime;
115         /* AB: FIXME!!! This is definitely nonsense */
116         if (runtime) {
117                 info->sync = runtime->sync;
118                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
119         }
120         return 0;
121 }
122
123 int snd_pcm_info_user(struct snd_pcm_substream *substream,
124                       struct snd_pcm_info __user * _info)
125 {
126         struct snd_pcm_info *info;
127         int err;
128
129         info = kmalloc(sizeof(*info), GFP_KERNEL);
130         if (! info)
131                 return -ENOMEM;
132         err = snd_pcm_info(substream, info);
133         if (err >= 0) {
134                 if (copy_to_user(_info, info, sizeof(*info)))
135                         err = -EFAULT;
136         }
137         kfree(info);
138         return err;
139 }
140
141 #undef RULES_DEBUG
142
143 #ifdef RULES_DEBUG
144 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
145 static const char * const snd_pcm_hw_param_names[] = {
146         HW_PARAM(ACCESS),
147         HW_PARAM(FORMAT),
148         HW_PARAM(SUBFORMAT),
149         HW_PARAM(SAMPLE_BITS),
150         HW_PARAM(FRAME_BITS),
151         HW_PARAM(CHANNELS),
152         HW_PARAM(RATE),
153         HW_PARAM(PERIOD_TIME),
154         HW_PARAM(PERIOD_SIZE),
155         HW_PARAM(PERIOD_BYTES),
156         HW_PARAM(PERIODS),
157         HW_PARAM(BUFFER_TIME),
158         HW_PARAM(BUFFER_SIZE),
159         HW_PARAM(BUFFER_BYTES),
160         HW_PARAM(TICK_TIME),
161 };
162 #endif
163
164 int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 
165                       struct snd_pcm_hw_params *params)
166 {
167         unsigned int k;
168         struct snd_pcm_hardware *hw;
169         struct snd_interval *i = NULL;
170         struct snd_mask *m = NULL;
171         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
172         unsigned int rstamps[constrs->rules_num];
173         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
174         unsigned int stamp = 2;
175         int changed, again;
176
177         params->info = 0;
178         params->fifo_size = 0;
179         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
180                 params->msbits = 0;
181         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
182                 params->rate_num = 0;
183                 params->rate_den = 0;
184         }
185
186         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
187                 m = hw_param_mask(params, k);
188                 if (snd_mask_empty(m))
189                         return -EINVAL;
190                 if (!(params->rmask & (1 << k)))
191                         continue;
192 #ifdef RULES_DEBUG
193                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
194                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
195 #endif
196                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
197 #ifdef RULES_DEBUG
198                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
199 #endif
200                 if (changed)
201                         params->cmask |= 1 << k;
202                 if (changed < 0)
203                         return changed;
204         }
205
206         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
207                 i = hw_param_interval(params, k);
208                 if (snd_interval_empty(i))
209                         return -EINVAL;
210                 if (!(params->rmask & (1 << k)))
211                         continue;
212 #ifdef RULES_DEBUG
213                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
214                 if (i->empty)
215                         printk("empty");
216                 else
217                         printk("%c%u %u%c", 
218                                i->openmin ? '(' : '[', i->min,
219                                i->max, i->openmax ? ')' : ']');
220                 printk(" -> ");
221 #endif
222                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
223 #ifdef RULES_DEBUG
224                 if (i->empty)
225                         printk("empty\n");
226                 else 
227                         printk("%c%u %u%c\n", 
228                                i->openmin ? '(' : '[', i->min,
229                                i->max, i->openmax ? ')' : ']');
230 #endif
231                 if (changed)
232                         params->cmask |= 1 << k;
233                 if (changed < 0)
234                         return changed;
235         }
236
237         for (k = 0; k < constrs->rules_num; k++)
238                 rstamps[k] = 0;
239         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 
240                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
241         do {
242                 again = 0;
243                 for (k = 0; k < constrs->rules_num; k++) {
244                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
245                         unsigned int d;
246                         int doit = 0;
247                         if (r->cond && !(r->cond & params->flags))
248                                 continue;
249                         for (d = 0; r->deps[d] >= 0; d++) {
250                                 if (vstamps[r->deps[d]] > rstamps[k]) {
251                                         doit = 1;
252                                         break;
253                                 }
254                         }
255                         if (!doit)
256                                 continue;
257 #ifdef RULES_DEBUG
258                         printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
259                         if (r->var >= 0) {
260                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
261                                 if (hw_is_mask(r->var)) {
262                                         m = hw_param_mask(params, r->var);
263                                         printk("%x", *m->bits);
264                                 } else {
265                                         i = hw_param_interval(params, r->var);
266                                         if (i->empty)
267                                                 printk("empty");
268                                         else
269                                                 printk("%c%u %u%c", 
270                                                        i->openmin ? '(' : '[', i->min,
271                                                        i->max, i->openmax ? ')' : ']');
272                                 }
273                         }
274 #endif
275                         changed = r->func(params, r);
276 #ifdef RULES_DEBUG
277                         if (r->var >= 0) {
278                                 printk(" -> ");
279                                 if (hw_is_mask(r->var))
280                                         printk("%x", *m->bits);
281                                 else {
282                                         if (i->empty)
283                                                 printk("empty");
284                                         else
285                                                 printk("%c%u %u%c", 
286                                                        i->openmin ? '(' : '[', i->min,
287                                                        i->max, i->openmax ? ')' : ']');
288                                 }
289                         }
290                         printk("\n");
291 #endif
292                         rstamps[k] = stamp;
293                         if (changed && r->var >= 0) {
294                                 params->cmask |= (1 << r->var);
295                                 vstamps[r->var] = stamp;
296                                 again = 1;
297                         }
298                         if (changed < 0)
299                                 return changed;
300                         stamp++;
301                 }
302         } while (again);
303         if (!params->msbits) {
304                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
305                 if (snd_interval_single(i))
306                         params->msbits = snd_interval_value(i);
307         }
308
309         if (!params->rate_den) {
310                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
311                 if (snd_interval_single(i)) {
312                         params->rate_num = snd_interval_value(i);
313                         params->rate_den = 1;
314                 }
315         }
316
317         hw = &substream->runtime->hw;
318         if (!params->info)
319                 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
320         if (!params->fifo_size) {
321                 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
322                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
323                 if (snd_mask_min(m) == snd_mask_max(m) &&
324                     snd_interval_min(i) == snd_interval_max(i)) {
325                         changed = substream->ops->ioctl(substream,
326                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
327                         if (changed < 0)
328                                 return changed;
329                 }
330         }
331         params->rmask = 0;
332         return 0;
333 }
334
335 EXPORT_SYMBOL(snd_pcm_hw_refine);
336
337 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
338                                   struct snd_pcm_hw_params __user * _params)
339 {
340         struct snd_pcm_hw_params *params;
341         int err;
342
343         params = memdup_user(_params, sizeof(*params));
344         if (IS_ERR(params))
345                 return PTR_ERR(params);
346
347         err = snd_pcm_hw_refine(substream, params);
348         if (copy_to_user(_params, params, sizeof(*params))) {
349                 if (!err)
350                         err = -EFAULT;
351         }
352
353         kfree(params);
354         return err;
355 }
356
357 static int period_to_usecs(struct snd_pcm_runtime *runtime)
358 {
359         int usecs;
360
361         if (! runtime->rate)
362                 return -1; /* invalid */
363
364         /* take 75% of period time as the deadline */
365         usecs = (750000 / runtime->rate) * runtime->period_size;
366         usecs += ((750000 % runtime->rate) * runtime->period_size) /
367                 runtime->rate;
368
369         return usecs;
370 }
371
372 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
373 {
374         snd_pcm_stream_lock_irq(substream);
375         if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
376                 substream->runtime->status->state = state;
377         snd_pcm_stream_unlock_irq(substream);
378 }
379
380 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
381                              struct snd_pcm_hw_params *params)
382 {
383         struct snd_pcm_runtime *runtime;
384         int err, usecs;
385         unsigned int bits;
386         snd_pcm_uframes_t frames;
387
388         if (PCM_RUNTIME_CHECK(substream))
389                 return -ENXIO;
390         runtime = substream->runtime;
391         snd_pcm_stream_lock_irq(substream);
392         switch (runtime->status->state) {
393         case SNDRV_PCM_STATE_OPEN:
394         case SNDRV_PCM_STATE_SETUP:
395         case SNDRV_PCM_STATE_PREPARED:
396                 break;
397         default:
398                 snd_pcm_stream_unlock_irq(substream);
399                 return -EBADFD;
400         }
401         snd_pcm_stream_unlock_irq(substream);
402 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
403         if (!substream->oss.oss)
404 #endif
405                 if (atomic_read(&substream->mmap_count))
406                         return -EBADFD;
407
408         params->rmask = ~0U;
409         err = snd_pcm_hw_refine(substream, params);
410         if (err < 0)
411                 goto _error;
412
413         err = snd_pcm_hw_params_choose(substream, params);
414         if (err < 0)
415                 goto _error;
416
417         if (substream->ops->hw_params != NULL) {
418                 err = substream->ops->hw_params(substream, params);
419                 if (err < 0)
420                         goto _error;
421         }
422
423         runtime->access = params_access(params);
424         runtime->format = params_format(params);
425         runtime->subformat = params_subformat(params);
426         runtime->channels = params_channels(params);
427         runtime->rate = params_rate(params);
428         runtime->period_size = params_period_size(params);
429         runtime->periods = params_periods(params);
430         runtime->buffer_size = params_buffer_size(params);
431         runtime->info = params->info;
432         runtime->rate_num = params->rate_num;
433         runtime->rate_den = params->rate_den;
434         runtime->no_period_wakeup =
435                         (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
436                         (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
437
438         bits = snd_pcm_format_physical_width(runtime->format);
439         runtime->sample_bits = bits;
440         bits *= runtime->channels;
441         runtime->frame_bits = bits;
442         frames = 1;
443         while (bits % 8 != 0) {
444                 bits *= 2;
445                 frames *= 2;
446         }
447         runtime->byte_align = bits / 8;
448         runtime->min_align = frames;
449
450         /* Default sw params */
451         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
452         runtime->period_step = 1;
453         runtime->control->avail_min = runtime->period_size;
454         runtime->start_threshold = 1;
455         runtime->stop_threshold = runtime->buffer_size;
456         runtime->silence_threshold = 0;
457         runtime->silence_size = 0;
458         runtime->boundary = runtime->buffer_size;
459         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
460                 runtime->boundary *= 2;
461
462         snd_pcm_timer_resolution_change(substream);
463         snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
464
465         if (pm_qos_request_active(&substream->latency_pm_qos_req))
466                 pm_qos_remove_request(&substream->latency_pm_qos_req);
467         if ((usecs = period_to_usecs(runtime)) >= 0)
468                 pm_qos_add_request(&substream->latency_pm_qos_req,
469                                    PM_QOS_CPU_DMA_LATENCY, usecs);
470         return 0;
471  _error:
472         /* hardware might be unusable from this time,
473            so we force application to retry to set
474            the correct hardware parameter settings */
475         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
476         if (substream->ops->hw_free != NULL)
477                 substream->ops->hw_free(substream);
478         return err;
479 }
480
481 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
482                                   struct snd_pcm_hw_params __user * _params)
483 {
484         struct snd_pcm_hw_params *params;
485         int err;
486
487         params = memdup_user(_params, sizeof(*params));
488         if (IS_ERR(params))
489                 return PTR_ERR(params);
490
491         err = snd_pcm_hw_params(substream, params);
492         if (copy_to_user(_params, params, sizeof(*params))) {
493                 if (!err)
494                         err = -EFAULT;
495         }
496
497         kfree(params);
498         return err;
499 }
500
501 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
502 {
503         struct snd_pcm_runtime *runtime;
504         int result = 0;
505
506         if (PCM_RUNTIME_CHECK(substream))
507                 return -ENXIO;
508         runtime = substream->runtime;
509         snd_pcm_stream_lock_irq(substream);
510         switch (runtime->status->state) {
511         case SNDRV_PCM_STATE_SETUP:
512         case SNDRV_PCM_STATE_PREPARED:
513                 break;
514         default:
515                 snd_pcm_stream_unlock_irq(substream);
516                 return -EBADFD;
517         }
518         snd_pcm_stream_unlock_irq(substream);
519         if (atomic_read(&substream->mmap_count))
520                 return -EBADFD;
521         if (substream->ops->hw_free)
522                 result = substream->ops->hw_free(substream);
523         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
524         pm_qos_remove_request(&substream->latency_pm_qos_req);
525         return result;
526 }
527
528 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
529                              struct snd_pcm_sw_params *params)
530 {
531         struct snd_pcm_runtime *runtime;
532         int err;
533
534         if (PCM_RUNTIME_CHECK(substream))
535                 return -ENXIO;
536         runtime = substream->runtime;
537         snd_pcm_stream_lock_irq(substream);
538         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
539                 snd_pcm_stream_unlock_irq(substream);
540                 return -EBADFD;
541         }
542         snd_pcm_stream_unlock_irq(substream);
543
544         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
545                 return -EINVAL;
546         if (params->avail_min == 0)
547                 return -EINVAL;
548         if (params->silence_size >= runtime->boundary) {
549                 if (params->silence_threshold != 0)
550                         return -EINVAL;
551         } else {
552                 if (params->silence_size > params->silence_threshold)
553                         return -EINVAL;
554                 if (params->silence_threshold > runtime->buffer_size)
555                         return -EINVAL;
556         }
557         err = 0;
558         snd_pcm_stream_lock_irq(substream);
559         runtime->tstamp_mode = params->tstamp_mode;
560         runtime->period_step = params->period_step;
561         runtime->control->avail_min = params->avail_min;
562         runtime->start_threshold = params->start_threshold;
563         runtime->stop_threshold = params->stop_threshold;
564         runtime->silence_threshold = params->silence_threshold;
565         runtime->silence_size = params->silence_size;
566         params->boundary = runtime->boundary;
567         if (snd_pcm_running(substream)) {
568                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
569                     runtime->silence_size > 0)
570                         snd_pcm_playback_silence(substream, ULONG_MAX);
571                 err = snd_pcm_update_state(substream, runtime);
572         }
573         snd_pcm_stream_unlock_irq(substream);
574         return err;
575 }
576
577 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
578                                   struct snd_pcm_sw_params __user * _params)
579 {
580         struct snd_pcm_sw_params params;
581         int err;
582         if (copy_from_user(&params, _params, sizeof(params)))
583                 return -EFAULT;
584         err = snd_pcm_sw_params(substream, &params);
585         if (copy_to_user(_params, &params, sizeof(params)))
586                 return -EFAULT;
587         return err;
588 }
589
590 int snd_pcm_status(struct snd_pcm_substream *substream,
591                    struct snd_pcm_status *status)
592 {
593         struct snd_pcm_runtime *runtime = substream->runtime;
594
595         snd_pcm_stream_lock_irq(substream);
596         status->state = runtime->status->state;
597         status->suspended_state = runtime->status->suspended_state;
598         if (status->state == SNDRV_PCM_STATE_OPEN)
599                 goto _end;
600         status->trigger_tstamp = runtime->trigger_tstamp;
601         if (snd_pcm_running(substream)) {
602                 snd_pcm_update_hw_ptr(substream);
603                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
604                         status->tstamp = runtime->status->tstamp;
605                         goto _tstamp_end;
606                 }
607         }
608         snd_pcm_gettime(runtime, &status->tstamp);
609  _tstamp_end:
610         status->appl_ptr = runtime->control->appl_ptr;
611         status->hw_ptr = runtime->status->hw_ptr;
612         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
613                 status->avail = snd_pcm_playback_avail(runtime);
614                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
615                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
616                         status->delay = runtime->buffer_size - status->avail;
617                         status->delay += runtime->delay;
618                 } else
619                         status->delay = 0;
620         } else {
621                 status->avail = snd_pcm_capture_avail(runtime);
622                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
623                         status->delay = status->avail + runtime->delay;
624                 else
625                         status->delay = 0;
626         }
627         status->avail_max = runtime->avail_max;
628         status->overrange = runtime->overrange;
629         runtime->avail_max = 0;
630         runtime->overrange = 0;
631  _end:
632         snd_pcm_stream_unlock_irq(substream);
633         return 0;
634 }
635
636 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
637                                struct snd_pcm_status __user * _status)
638 {
639         struct snd_pcm_status status;
640         int res;
641         
642         memset(&status, 0, sizeof(status));
643         res = snd_pcm_status(substream, &status);
644         if (res < 0)
645                 return res;
646         if (copy_to_user(_status, &status, sizeof(status)))
647                 return -EFAULT;
648         return 0;
649 }
650
651 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
652                                 struct snd_pcm_channel_info * info)
653 {
654         struct snd_pcm_runtime *runtime;
655         unsigned int channel;
656         
657         channel = info->channel;
658         runtime = substream->runtime;
659         snd_pcm_stream_lock_irq(substream);
660         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
661                 snd_pcm_stream_unlock_irq(substream);
662                 return -EBADFD;
663         }
664         snd_pcm_stream_unlock_irq(substream);
665         if (channel >= runtime->channels)
666                 return -EINVAL;
667         memset(info, 0, sizeof(*info));
668         info->channel = channel;
669         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
670 }
671
672 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
673                                      struct snd_pcm_channel_info __user * _info)
674 {
675         struct snd_pcm_channel_info info;
676         int res;
677         
678         if (copy_from_user(&info, _info, sizeof(info)))
679                 return -EFAULT;
680         res = snd_pcm_channel_info(substream, &info);
681         if (res < 0)
682                 return res;
683         if (copy_to_user(_info, &info, sizeof(info)))
684                 return -EFAULT;
685         return 0;
686 }
687
688 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
689 {
690         struct snd_pcm_runtime *runtime = substream->runtime;
691         if (runtime->trigger_master == NULL)
692                 return;
693         if (runtime->trigger_master == substream) {
694                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
695         } else {
696                 snd_pcm_trigger_tstamp(runtime->trigger_master);
697                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
698         }
699         runtime->trigger_master = NULL;
700 }
701
702 struct action_ops {
703         int (*pre_action)(struct snd_pcm_substream *substream, int state);
704         int (*do_action)(struct snd_pcm_substream *substream, int state);
705         void (*undo_action)(struct snd_pcm_substream *substream, int state);
706         void (*post_action)(struct snd_pcm_substream *substream, int state);
707 };
708
709 /*
710  *  this functions is core for handling of linked stream
711  *  Note: the stream state might be changed also on failure
712  *  Note2: call with calling stream lock + link lock
713  */
714 static int snd_pcm_action_group(struct action_ops *ops,
715                                 struct snd_pcm_substream *substream,
716                                 int state, int do_lock)
717 {
718         struct snd_pcm_substream *s = NULL;
719         struct snd_pcm_substream *s1;
720         int res = 0;
721
722         snd_pcm_group_for_each_entry(s, substream) {
723                 if (do_lock && s != substream)
724                         spin_lock_nested(&s->self_group.lock,
725                                          SINGLE_DEPTH_NESTING);
726                 res = ops->pre_action(s, state);
727                 if (res < 0)
728                         goto _unlock;
729         }
730         snd_pcm_group_for_each_entry(s, substream) {
731                 res = ops->do_action(s, state);
732                 if (res < 0) {
733                         if (ops->undo_action) {
734                                 snd_pcm_group_for_each_entry(s1, substream) {
735                                         if (s1 == s) /* failed stream */
736                                                 break;
737                                         ops->undo_action(s1, state);
738                                 }
739                         }
740                         s = NULL; /* unlock all */
741                         goto _unlock;
742                 }
743         }
744         snd_pcm_group_for_each_entry(s, substream) {
745                 ops->post_action(s, state);
746         }
747  _unlock:
748         if (do_lock) {
749                 /* unlock streams */
750                 snd_pcm_group_for_each_entry(s1, substream) {
751                         if (s1 != substream)
752                                 spin_unlock(&s1->self_group.lock);
753                         if (s1 == s)    /* end */
754                                 break;
755                 }
756         }
757         return res;
758 }
759
760 /*
761  *  Note: call with stream lock
762  */
763 static int snd_pcm_action_single(struct action_ops *ops,
764                                  struct snd_pcm_substream *substream,
765                                  int state)
766 {
767         int res;
768         
769         res = ops->pre_action(substream, state);
770         if (res < 0)
771                 return res;
772         res = ops->do_action(substream, state);
773         if (res == 0)
774                 ops->post_action(substream, state);
775         else if (ops->undo_action)
776                 ops->undo_action(substream, state);
777         return res;
778 }
779
780 /*
781  *  Note: call with stream lock
782  */
783 static int snd_pcm_action(struct action_ops *ops,
784                           struct snd_pcm_substream *substream,
785                           int state)
786 {
787         int res;
788
789         if (snd_pcm_stream_linked(substream)) {
790                 if (!spin_trylock(&substream->group->lock)) {
791                         spin_unlock(&substream->self_group.lock);
792                         spin_lock(&substream->group->lock);
793                         spin_lock(&substream->self_group.lock);
794                 }
795                 res = snd_pcm_action_group(ops, substream, state, 1);
796                 spin_unlock(&substream->group->lock);
797         } else {
798                 res = snd_pcm_action_single(ops, substream, state);
799         }
800         return res;
801 }
802
803 /*
804  *  Note: don't use any locks before
805  */
806 static int snd_pcm_action_lock_irq(struct action_ops *ops,
807                                    struct snd_pcm_substream *substream,
808                                    int state)
809 {
810         int res;
811
812         read_lock_irq(&snd_pcm_link_rwlock);
813         if (snd_pcm_stream_linked(substream)) {
814                 spin_lock(&substream->group->lock);
815                 spin_lock(&substream->self_group.lock);
816                 res = snd_pcm_action_group(ops, substream, state, 1);
817                 spin_unlock(&substream->self_group.lock);
818                 spin_unlock(&substream->group->lock);
819         } else {
820                 spin_lock(&substream->self_group.lock);
821                 res = snd_pcm_action_single(ops, substream, state);
822                 spin_unlock(&substream->self_group.lock);
823         }
824         read_unlock_irq(&snd_pcm_link_rwlock);
825         return res;
826 }
827
828 /*
829  */
830 static int snd_pcm_action_nonatomic(struct action_ops *ops,
831                                     struct snd_pcm_substream *substream,
832                                     int state)
833 {
834         int res;
835
836         down_read(&snd_pcm_link_rwsem);
837         if (snd_pcm_stream_linked(substream))
838                 res = snd_pcm_action_group(ops, substream, state, 0);
839         else
840                 res = snd_pcm_action_single(ops, substream, state);
841         up_read(&snd_pcm_link_rwsem);
842         return res;
843 }
844
845 /*
846  * start callbacks
847  */
848 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
849 {
850         struct snd_pcm_runtime *runtime = substream->runtime;
851         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
852                 return -EBADFD;
853         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
854             !snd_pcm_playback_data(substream))
855                 return -EPIPE;
856         runtime->trigger_master = substream;
857         return 0;
858 }
859
860 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
861 {
862         if (substream->runtime->trigger_master != substream)
863                 return 0;
864         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
865 }
866
867 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
868 {
869         if (substream->runtime->trigger_master == substream)
870                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
871 }
872
873 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
874 {
875         struct snd_pcm_runtime *runtime = substream->runtime;
876         snd_pcm_trigger_tstamp(substream);
877         runtime->hw_ptr_jiffies = jiffies;
878         runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / 
879                                                             runtime->rate;
880         runtime->status->state = state;
881         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
882             runtime->silence_size > 0)
883                 snd_pcm_playback_silence(substream, ULONG_MAX);
884         if (substream->timer)
885                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
886                                  &runtime->trigger_tstamp);
887 }
888
889 static struct action_ops snd_pcm_action_start = {
890         .pre_action = snd_pcm_pre_start,
891         .do_action = snd_pcm_do_start,
892         .undo_action = snd_pcm_undo_start,
893         .post_action = snd_pcm_post_start
894 };
895
896 /**
897  * snd_pcm_start - start all linked streams
898  * @substream: the PCM substream instance
899  */
900 int snd_pcm_start(struct snd_pcm_substream *substream)
901 {
902         return snd_pcm_action(&snd_pcm_action_start, substream,
903                               SNDRV_PCM_STATE_RUNNING);
904 }
905
906 /*
907  * stop callbacks
908  */
909 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
910 {
911         struct snd_pcm_runtime *runtime = substream->runtime;
912         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
913                 return -EBADFD;
914         runtime->trigger_master = substream;
915         return 0;
916 }
917
918 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
919 {
920         if (substream->runtime->trigger_master == substream &&
921             snd_pcm_running(substream))
922                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
923         return 0; /* unconditonally stop all substreams */
924 }
925
926 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
927 {
928         struct snd_pcm_runtime *runtime = substream->runtime;
929         if (runtime->status->state != state) {
930                 snd_pcm_trigger_tstamp(substream);
931                 if (substream->timer)
932                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
933                                          &runtime->trigger_tstamp);
934                 runtime->status->state = state;
935         }
936         wake_up(&runtime->sleep);
937         wake_up(&runtime->tsleep);
938 }
939
940 static struct action_ops snd_pcm_action_stop = {
941         .pre_action = snd_pcm_pre_stop,
942         .do_action = snd_pcm_do_stop,
943         .post_action = snd_pcm_post_stop
944 };
945
946 /**
947  * snd_pcm_stop - try to stop all running streams in the substream group
948  * @substream: the PCM substream instance
949  * @state: PCM state after stopping the stream
950  *
951  * The state of each stream is then changed to the given state unconditionally.
952  */
953 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
954 {
955         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
956 }
957
958 EXPORT_SYMBOL(snd_pcm_stop);
959
960 /**
961  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
962  * @substream: the PCM substream
963  *
964  * After stopping, the state is changed to SETUP.
965  * Unlike snd_pcm_stop(), this affects only the given stream.
966  */
967 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
968 {
969         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
970                                      SNDRV_PCM_STATE_SETUP);
971 }
972
973 /*
974  * pause callbacks
975  */
976 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
977 {
978         struct snd_pcm_runtime *runtime = substream->runtime;
979         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
980                 return -ENOSYS;
981         if (push) {
982                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
983                         return -EBADFD;
984         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
985                 return -EBADFD;
986         runtime->trigger_master = substream;
987         return 0;
988 }
989
990 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
991 {
992         if (substream->runtime->trigger_master != substream)
993                 return 0;
994         /* some drivers might use hw_ptr to recover from the pause -
995            update the hw_ptr now */
996         if (push)
997                 snd_pcm_update_hw_ptr(substream);
998         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
999          * a delta between the current jiffies, this gives a large enough
1000          * delta, effectively to skip the check once.
1001          */
1002         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1003         return substream->ops->trigger(substream,
1004                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1005                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1006 }
1007
1008 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1009 {
1010         if (substream->runtime->trigger_master == substream)
1011                 substream->ops->trigger(substream,
1012                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1013                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1014 }
1015
1016 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1017 {
1018         struct snd_pcm_runtime *runtime = substream->runtime;
1019         snd_pcm_trigger_tstamp(substream);
1020         if (push) {
1021                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1022                 if (substream->timer)
1023                         snd_timer_notify(substream->timer,
1024                                          SNDRV_TIMER_EVENT_MPAUSE,
1025                                          &runtime->trigger_tstamp);
1026                 wake_up(&runtime->sleep);
1027                 wake_up(&runtime->tsleep);
1028         } else {
1029                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1030                 if (substream->timer)
1031                         snd_timer_notify(substream->timer,
1032                                          SNDRV_TIMER_EVENT_MCONTINUE,
1033                                          &runtime->trigger_tstamp);
1034         }
1035 }
1036
1037 static struct action_ops snd_pcm_action_pause = {
1038         .pre_action = snd_pcm_pre_pause,
1039         .do_action = snd_pcm_do_pause,
1040         .undo_action = snd_pcm_undo_pause,
1041         .post_action = snd_pcm_post_pause
1042 };
1043
1044 /*
1045  * Push/release the pause for all linked streams.
1046  */
1047 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1048 {
1049         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1050 }
1051
1052 #ifdef CONFIG_PM
1053 /* suspend */
1054
1055 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1056 {
1057         struct snd_pcm_runtime *runtime = substream->runtime;
1058         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1059                 return -EBUSY;
1060         runtime->trigger_master = substream;
1061         return 0;
1062 }
1063
1064 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1065 {
1066         struct snd_pcm_runtime *runtime = substream->runtime;
1067         if (runtime->trigger_master != substream)
1068                 return 0;
1069         if (! snd_pcm_running(substream))
1070                 return 0;
1071         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1072         return 0; /* suspend unconditionally */
1073 }
1074
1075 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1076 {
1077         struct snd_pcm_runtime *runtime = substream->runtime;
1078         snd_pcm_trigger_tstamp(substream);
1079         if (substream->timer)
1080                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1081                                  &runtime->trigger_tstamp);
1082         runtime->status->suspended_state = runtime->status->state;
1083         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1084         wake_up(&runtime->sleep);
1085         wake_up(&runtime->tsleep);
1086 }
1087
1088 static struct action_ops snd_pcm_action_suspend = {
1089         .pre_action = snd_pcm_pre_suspend,
1090         .do_action = snd_pcm_do_suspend,
1091         .post_action = snd_pcm_post_suspend
1092 };
1093
1094 /**
1095  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1096  * @substream: the PCM substream
1097  *
1098  * After this call, all streams are changed to SUSPENDED state.
1099  */
1100 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1101 {
1102         int err;
1103         unsigned long flags;
1104
1105         if (! substream)
1106                 return 0;
1107
1108         snd_pcm_stream_lock_irqsave(substream, flags);
1109         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1110         snd_pcm_stream_unlock_irqrestore(substream, flags);
1111         return err;
1112 }
1113
1114 EXPORT_SYMBOL(snd_pcm_suspend);
1115
1116 /**
1117  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1118  * @pcm: the PCM instance
1119  *
1120  * After this call, all streams are changed to SUSPENDED state.
1121  */
1122 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1123 {
1124         struct snd_pcm_substream *substream;
1125         int stream, err = 0;
1126
1127         if (! pcm)
1128                 return 0;
1129
1130         for (stream = 0; stream < 2; stream++) {
1131                 for (substream = pcm->streams[stream].substream;
1132                      substream; substream = substream->next) {
1133                         /* FIXME: the open/close code should lock this as well */
1134                         if (substream->runtime == NULL)
1135                                 continue;
1136                         err = snd_pcm_suspend(substream);
1137                         if (err < 0 && err != -EBUSY)
1138                                 return err;
1139                 }
1140         }
1141         return 0;
1142 }
1143
1144 EXPORT_SYMBOL(snd_pcm_suspend_all);
1145
1146 /* resume */
1147
1148 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1149 {
1150         struct snd_pcm_runtime *runtime = substream->runtime;
1151         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1152                 return -ENOSYS;
1153         runtime->trigger_master = substream;
1154         return 0;
1155 }
1156
1157 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1158 {
1159         struct snd_pcm_runtime *runtime = substream->runtime;
1160         if (runtime->trigger_master != substream)
1161                 return 0;
1162         /* DMA not running previously? */
1163         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1164             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1165              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1166                 return 0;
1167         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1168 }
1169
1170 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1171 {
1172         if (substream->runtime->trigger_master == substream &&
1173             snd_pcm_running(substream))
1174                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1175 }
1176
1177 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1178 {
1179         struct snd_pcm_runtime *runtime = substream->runtime;
1180         snd_pcm_trigger_tstamp(substream);
1181         if (substream->timer)
1182                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1183                                  &runtime->trigger_tstamp);
1184         runtime->status->state = runtime->status->suspended_state;
1185 }
1186
1187 static struct action_ops snd_pcm_action_resume = {
1188         .pre_action = snd_pcm_pre_resume,
1189         .do_action = snd_pcm_do_resume,
1190         .undo_action = snd_pcm_undo_resume,
1191         .post_action = snd_pcm_post_resume
1192 };
1193
1194 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1195 {
1196         struct snd_card *card = substream->pcm->card;
1197         int res;
1198
1199         snd_power_lock(card);
1200         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1201                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1202         snd_power_unlock(card);
1203         return res;
1204 }
1205
1206 #else
1207
1208 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1209 {
1210         return -ENOSYS;
1211 }
1212
1213 #endif /* CONFIG_PM */
1214
1215 /*
1216  * xrun ioctl
1217  *
1218  * Change the RUNNING stream(s) to XRUN state.
1219  */
1220 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1221 {
1222         struct snd_card *card = substream->pcm->card;
1223         struct snd_pcm_runtime *runtime = substream->runtime;
1224         int result;
1225
1226         snd_power_lock(card);
1227         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1228                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1229                 if (result < 0)
1230                         goto _unlock;
1231         }
1232
1233         snd_pcm_stream_lock_irq(substream);
1234         switch (runtime->status->state) {
1235         case SNDRV_PCM_STATE_XRUN:
1236                 result = 0;     /* already there */
1237                 break;
1238         case SNDRV_PCM_STATE_RUNNING:
1239                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1240                 break;
1241         default:
1242                 result = -EBADFD;
1243         }
1244         snd_pcm_stream_unlock_irq(substream);
1245  _unlock:
1246         snd_power_unlock(card);
1247         return result;
1248 }
1249
1250 /*
1251  * reset ioctl
1252  */
1253 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1254 {
1255         struct snd_pcm_runtime *runtime = substream->runtime;
1256         switch (runtime->status->state) {
1257         case SNDRV_PCM_STATE_RUNNING:
1258         case SNDRV_PCM_STATE_PREPARED:
1259         case SNDRV_PCM_STATE_PAUSED:
1260         case SNDRV_PCM_STATE_SUSPENDED:
1261                 return 0;
1262         default:
1263                 return -EBADFD;
1264         }
1265 }
1266
1267 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1268 {
1269         struct snd_pcm_runtime *runtime = substream->runtime;
1270         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1271         if (err < 0)
1272                 return err;
1273         runtime->hw_ptr_base = 0;
1274         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1275                 runtime->status->hw_ptr % runtime->period_size;
1276         runtime->silence_start = runtime->status->hw_ptr;
1277         runtime->silence_filled = 0;
1278         return 0;
1279 }
1280
1281 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1282 {
1283         struct snd_pcm_runtime *runtime = substream->runtime;
1284         runtime->control->appl_ptr = runtime->status->hw_ptr;
1285         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1286             runtime->silence_size > 0)
1287                 snd_pcm_playback_silence(substream, ULONG_MAX);
1288 }
1289
1290 static struct action_ops snd_pcm_action_reset = {
1291         .pre_action = snd_pcm_pre_reset,
1292         .do_action = snd_pcm_do_reset,
1293         .post_action = snd_pcm_post_reset
1294 };
1295
1296 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1297 {
1298         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1299 }
1300
1301 /*
1302  * prepare ioctl
1303  */
1304 /* we use the second argument for updating f_flags */
1305 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1306                                int f_flags)
1307 {
1308         struct snd_pcm_runtime *runtime = substream->runtime;
1309         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1310             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1311                 return -EBADFD;
1312         if (snd_pcm_running(substream))
1313                 return -EBUSY;
1314         substream->f_flags = f_flags;
1315         return 0;
1316 }
1317
1318 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1319 {
1320         int err;
1321         err = substream->ops->prepare(substream);
1322         if (err < 0)
1323                 return err;
1324         return snd_pcm_do_reset(substream, 0);
1325 }
1326
1327 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1328 {
1329         struct snd_pcm_runtime *runtime = substream->runtime;
1330         runtime->control->appl_ptr = runtime->status->hw_ptr;
1331         snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1332 }
1333
1334 static struct action_ops snd_pcm_action_prepare = {
1335         .pre_action = snd_pcm_pre_prepare,
1336         .do_action = snd_pcm_do_prepare,
1337         .post_action = snd_pcm_post_prepare
1338 };
1339
1340 /**
1341  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1342  * @substream: the PCM substream instance
1343  * @file: file to refer f_flags
1344  */
1345 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1346                            struct file *file)
1347 {
1348         int res;
1349         struct snd_card *card = substream->pcm->card;
1350         int f_flags;
1351
1352         if (file)
1353                 f_flags = file->f_flags;
1354         else
1355                 f_flags = substream->f_flags;
1356
1357         snd_power_lock(card);
1358         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1359                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1360                                                substream, f_flags);
1361         snd_power_unlock(card);
1362         return res;
1363 }
1364
1365 /*
1366  * drain ioctl
1367  */
1368
1369 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1370 {
1371         substream->runtime->trigger_master = substream;
1372         return 0;
1373 }
1374
1375 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1376 {
1377         struct snd_pcm_runtime *runtime = substream->runtime;
1378         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1379                 switch (runtime->status->state) {
1380                 case SNDRV_PCM_STATE_PREPARED:
1381                         /* start playback stream if possible */
1382                         if (! snd_pcm_playback_empty(substream)) {
1383                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1384                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1385                         }
1386                         break;
1387                 case SNDRV_PCM_STATE_RUNNING:
1388                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1389                         break;
1390                 default:
1391                         break;
1392                 }
1393         } else {
1394                 /* stop running stream */
1395                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1396                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1397                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1398                         snd_pcm_do_stop(substream, new_state);
1399                         snd_pcm_post_stop(substream, new_state);
1400                 }
1401         }
1402         return 0;
1403 }
1404
1405 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1406 {
1407 }
1408
1409 static struct action_ops snd_pcm_action_drain_init = {
1410         .pre_action = snd_pcm_pre_drain_init,
1411         .do_action = snd_pcm_do_drain_init,
1412         .post_action = snd_pcm_post_drain_init
1413 };
1414
1415 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1416
1417 /*
1418  * Drain the stream(s).
1419  * When the substream is linked, sync until the draining of all playback streams
1420  * is finished.
1421  * After this call, all streams are supposed to be either SETUP or DRAINING
1422  * (capture only) state.
1423  */
1424 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1425                          struct file *file)
1426 {
1427         struct snd_card *card;
1428         struct snd_pcm_runtime *runtime;
1429         struct snd_pcm_substream *s;
1430         wait_queue_t wait;
1431         int result = 0;
1432         int nonblock = 0;
1433
1434         card = substream->pcm->card;
1435         runtime = substream->runtime;
1436
1437         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1438                 return -EBADFD;
1439
1440         snd_power_lock(card);
1441         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1442                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1443                 if (result < 0) {
1444                         snd_power_unlock(card);
1445                         return result;
1446                 }
1447         }
1448
1449         if (file) {
1450                 if (file->f_flags & O_NONBLOCK)
1451                         nonblock = 1;
1452         } else if (substream->f_flags & O_NONBLOCK)
1453                 nonblock = 1;
1454
1455         down_read(&snd_pcm_link_rwsem);
1456         snd_pcm_stream_lock_irq(substream);
1457         /* resume pause */
1458         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1459                 snd_pcm_pause(substream, 0);
1460
1461         /* pre-start/stop - all running streams are changed to DRAINING state */
1462         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1463         if (result < 0)
1464                 goto unlock;
1465         /* in non-blocking, we don't wait in ioctl but let caller poll */
1466         if (nonblock) {
1467                 result = -EAGAIN;
1468                 goto unlock;
1469         }
1470
1471         for (;;) {
1472                 long tout;
1473                 struct snd_pcm_runtime *to_check;
1474                 if (signal_pending(current)) {
1475                         result = -ERESTARTSYS;
1476                         break;
1477                 }
1478                 /* find a substream to drain */
1479                 to_check = NULL;
1480                 snd_pcm_group_for_each_entry(s, substream) {
1481                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1482                                 continue;
1483                         runtime = s->runtime;
1484                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1485                                 to_check = runtime;
1486                                 break;
1487                         }
1488                 }
1489                 if (!to_check)
1490                         break; /* all drained */
1491                 init_waitqueue_entry(&wait, current);
1492                 add_wait_queue(&to_check->sleep, &wait);
1493                 snd_pcm_stream_unlock_irq(substream);
1494                 up_read(&snd_pcm_link_rwsem);
1495                 snd_power_unlock(card);
1496                 if (runtime->no_period_wakeup)
1497                         tout = MAX_SCHEDULE_TIMEOUT;
1498                 else {
1499                         tout = 10;
1500                         if (runtime->rate) {
1501                                 long t = runtime->period_size * 2 / runtime->rate;
1502                                 tout = max(t, tout);
1503                         }
1504                         tout = msecs_to_jiffies(tout * 1000);
1505                 }
1506                 tout = schedule_timeout_interruptible(tout);
1507                 snd_power_lock(card);
1508                 down_read(&snd_pcm_link_rwsem);
1509                 snd_pcm_stream_lock_irq(substream);
1510                 remove_wait_queue(&to_check->sleep, &wait);
1511                 if (card->shutdown) {
1512                         result = -ENODEV;
1513                         break;
1514                 }
1515                 if (tout == 0) {
1516                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1517                                 result = -ESTRPIPE;
1518                         else {
1519                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1520                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1521                                 result = -EIO;
1522                         }
1523                         break;
1524                 }
1525         }
1526
1527  unlock:
1528         snd_pcm_stream_unlock_irq(substream);
1529         up_read(&snd_pcm_link_rwsem);
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         int result = 0;
1544         
1545         if (PCM_RUNTIME_CHECK(substream))
1546                 return -ENXIO;
1547         runtime = substream->runtime;
1548
1549         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1550             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1551             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1552                 return -EBADFD;
1553
1554         snd_pcm_stream_lock_irq(substream);
1555         /* resume pause */
1556         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1557                 snd_pcm_pause(substream, 0);
1558
1559         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1560         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1561         snd_pcm_stream_unlock_irq(substream);
1562
1563         return result;
1564 }
1565
1566
1567 /* WARNING: Don't forget to fput back the file */
1568 static struct file *snd_pcm_file_fd(int fd)
1569 {
1570         struct file *file;
1571         struct inode *inode;
1572         unsigned int minor;
1573
1574         file = fget(fd);
1575         if (!file)
1576                 return NULL;
1577         inode = file->f_path.dentry->d_inode;
1578         if (!S_ISCHR(inode->i_mode) ||
1579             imajor(inode) != snd_major) {
1580                 fput(file);
1581                 return NULL;
1582         }
1583         minor = iminor(inode);
1584         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1585             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1586                 fput(file);
1587                 return NULL;
1588         }
1589         return file;
1590 }
1591
1592 /*
1593  * PCM link handling
1594  */
1595 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1596 {
1597         int res = 0;
1598         struct file *file;
1599         struct snd_pcm_file *pcm_file;
1600         struct snd_pcm_substream *substream1;
1601         struct snd_pcm_group *group;
1602
1603         file = snd_pcm_file_fd(fd);
1604         if (!file)
1605                 return -EBADFD;
1606         pcm_file = file->private_data;
1607         substream1 = pcm_file->substream;
1608         group = kmalloc(sizeof(*group), GFP_KERNEL);
1609         if (!group) {
1610                 res = -ENOMEM;
1611                 goto _nolock;
1612         }
1613         down_write(&snd_pcm_link_rwsem);
1614         write_lock_irq(&snd_pcm_link_rwlock);
1615         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1616             substream->runtime->status->state != substream1->runtime->status->state) {
1617                 res = -EBADFD;
1618                 goto _end;
1619         }
1620         if (snd_pcm_stream_linked(substream1)) {
1621                 res = -EALREADY;
1622                 goto _end;
1623         }
1624         if (!snd_pcm_stream_linked(substream)) {
1625                 substream->group = group;
1626                 spin_lock_init(&substream->group->lock);
1627                 INIT_LIST_HEAD(&substream->group->substreams);
1628                 list_add_tail(&substream->link_list, &substream->group->substreams);
1629                 substream->group->count = 1;
1630         }
1631         list_add_tail(&substream1->link_list, &substream->group->substreams);
1632         substream->group->count++;
1633         substream1->group = substream->group;
1634  _end:
1635         write_unlock_irq(&snd_pcm_link_rwlock);
1636         up_write(&snd_pcm_link_rwsem);
1637  _nolock:
1638         snd_card_unref(substream1->pcm->card);
1639         fput(file);
1640         if (res < 0)
1641                 kfree(group);
1642         return res;
1643 }
1644
1645 static void relink_to_local(struct snd_pcm_substream *substream)
1646 {
1647         substream->group = &substream->self_group;
1648         INIT_LIST_HEAD(&substream->self_group.substreams);
1649         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1650 }
1651
1652 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1653 {
1654         struct snd_pcm_substream *s;
1655         int res = 0;
1656
1657         down_write(&snd_pcm_link_rwsem);
1658         write_lock_irq(&snd_pcm_link_rwlock);
1659         if (!snd_pcm_stream_linked(substream)) {
1660                 res = -EALREADY;
1661                 goto _end;
1662         }
1663         list_del(&substream->link_list);
1664         substream->group->count--;
1665         if (substream->group->count == 1) {     /* detach the last stream, too */
1666                 snd_pcm_group_for_each_entry(s, substream) {
1667                         relink_to_local(s);
1668                         break;
1669                 }
1670                 kfree(substream->group);
1671         }
1672         relink_to_local(substream);
1673        _end:
1674         write_unlock_irq(&snd_pcm_link_rwlock);
1675         up_write(&snd_pcm_link_rwsem);
1676         return res;
1677 }
1678
1679 /*
1680  * hw configurator
1681  */
1682 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1683                                struct snd_pcm_hw_rule *rule)
1684 {
1685         struct snd_interval t;
1686         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1687                      hw_param_interval_c(params, rule->deps[1]), &t);
1688         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1689 }
1690
1691 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1692                                struct snd_pcm_hw_rule *rule)
1693 {
1694         struct snd_interval t;
1695         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1696                      hw_param_interval_c(params, rule->deps[1]), &t);
1697         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1698 }
1699
1700 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1701                                    struct snd_pcm_hw_rule *rule)
1702 {
1703         struct snd_interval t;
1704         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1705                          hw_param_interval_c(params, rule->deps[1]),
1706                          (unsigned long) rule->private, &t);
1707         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1708 }
1709
1710 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1711                                    struct snd_pcm_hw_rule *rule)
1712 {
1713         struct snd_interval t;
1714         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1715                          (unsigned long) rule->private,
1716                          hw_param_interval_c(params, rule->deps[1]), &t);
1717         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1718 }
1719
1720 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1721                                   struct snd_pcm_hw_rule *rule)
1722 {
1723         unsigned int k;
1724         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1725         struct snd_mask m;
1726         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1727         snd_mask_any(&m);
1728         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1729                 int bits;
1730                 if (! snd_mask_test(mask, k))
1731                         continue;
1732                 bits = snd_pcm_format_physical_width(k);
1733                 if (bits <= 0)
1734                         continue; /* ignore invalid formats */
1735                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1736                         snd_mask_reset(&m, k);
1737         }
1738         return snd_mask_refine(mask, &m);
1739 }
1740
1741 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1742                                        struct snd_pcm_hw_rule *rule)
1743 {
1744         struct snd_interval t;
1745         unsigned int k;
1746         t.min = UINT_MAX;
1747         t.max = 0;
1748         t.openmin = 0;
1749         t.openmax = 0;
1750         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1751                 int bits;
1752                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1753                         continue;
1754                 bits = snd_pcm_format_physical_width(k);
1755                 if (bits <= 0)
1756                         continue; /* ignore invalid formats */
1757                 if (t.min > (unsigned)bits)
1758                         t.min = bits;
1759                 if (t.max < (unsigned)bits)
1760                         t.max = bits;
1761         }
1762         t.integer = 1;
1763         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1764 }
1765
1766 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1767 #error "Change this table"
1768 #endif
1769
1770 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1771                                  48000, 64000, 88200, 96000, 176400, 192000 };
1772
1773 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1774         .count = ARRAY_SIZE(rates),
1775         .list = rates,
1776 };
1777
1778 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1779                                 struct snd_pcm_hw_rule *rule)
1780 {
1781         struct snd_pcm_hardware *hw = rule->private;
1782         return snd_interval_list(hw_param_interval(params, rule->var),
1783                                  snd_pcm_known_rates.count,
1784                                  snd_pcm_known_rates.list, hw->rates);
1785 }               
1786
1787 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1788                                             struct snd_pcm_hw_rule *rule)
1789 {
1790         struct snd_interval t;
1791         struct snd_pcm_substream *substream = rule->private;
1792         t.min = 0;
1793         t.max = substream->buffer_bytes_max;
1794         t.openmin = 0;
1795         t.openmax = 0;
1796         t.integer = 1;
1797         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1798 }               
1799
1800 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1801 {
1802         struct snd_pcm_runtime *runtime = substream->runtime;
1803         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1804         int k, err;
1805
1806         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1807                 snd_mask_any(constrs_mask(constrs, k));
1808         }
1809
1810         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1811                 snd_interval_any(constrs_interval(constrs, k));
1812         }
1813
1814         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1815         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1816         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1817         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1818         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1819
1820         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1821                                    snd_pcm_hw_rule_format, NULL,
1822                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1823         if (err < 0)
1824                 return err;
1825         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1826                                   snd_pcm_hw_rule_sample_bits, NULL,
1827                                   SNDRV_PCM_HW_PARAM_FORMAT, 
1828                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1829         if (err < 0)
1830                 return err;
1831         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, 
1832                                   snd_pcm_hw_rule_div, NULL,
1833                                   SNDRV_PCM_HW_PARAM_FRAME_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_mul, NULL,
1838                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -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_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1844         if (err < 0)
1845                 return err;
1846         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS, 
1847                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1848                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1849         if (err < 0)
1850                 return err;
1851         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 
1852                                   snd_pcm_hw_rule_div, NULL,
1853                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -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_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1859         if (err < 0)
1860                 return err;
1861         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1862                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1863                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1864         if (err < 0)
1865                 return err;
1866         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, 
1867                                   snd_pcm_hw_rule_div, NULL,
1868                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -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_div, NULL,
1873                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -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_mulkdiv, (void*) 8,
1878                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1879         if (err < 0)
1880                 return err;
1881         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 
1882                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1883                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -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_mul, NULL,
1888                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -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_mulkdiv, (void*) 8,
1893                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1894         if (err < 0)
1895                 return err;
1896         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 
1897                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1898                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1899         if (err < 0)
1900                 return err;
1901         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 
1902                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1903                                   SNDRV_PCM_HW_PARAM_PERIOD_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_BUFFER_BYTES, 
1907                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1908                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1909         if (err < 0)
1910                 return err;
1911         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 
1912                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1913                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1914         if (err < 0)
1915                 return err;
1916         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 
1917                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1918                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1919         if (err < 0)
1920                 return err;
1921         return 0;
1922 }
1923
1924 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1925 {
1926         struct snd_pcm_runtime *runtime = substream->runtime;
1927         struct snd_pcm_hardware *hw = &runtime->hw;
1928         int err;
1929         unsigned int mask = 0;
1930
1931         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1932                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1933         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1934                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1935         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1936                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1937                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1938                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1939                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1940                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1941                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1942         }
1943         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1944         if (err < 0)
1945                 return err;
1946
1947         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1948         if (err < 0)
1949                 return err;
1950
1951         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1952         if (err < 0)
1953                 return err;
1954
1955         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1956                                            hw->channels_min, hw->channels_max);
1957         if (err < 0)
1958                 return err;
1959
1960         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1961                                            hw->rate_min, hw->rate_max);
1962         if (err < 0)
1963                 return err;
1964
1965         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1966                                            hw->period_bytes_min, hw->period_bytes_max);
1967         if (err < 0)
1968                 return err;
1969
1970         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1971                                            hw->periods_min, hw->periods_max);
1972         if (err < 0)
1973                 return err;
1974
1975         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1976                                            hw->period_bytes_min, hw->buffer_bytes_max);
1977         if (err < 0)
1978                 return err;
1979
1980         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 
1981                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1982                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1983         if (err < 0)
1984                 return err;
1985
1986         /* FIXME: remove */
1987         if (runtime->dma_bytes) {
1988                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1989                 if (err < 0)
1990                         return -EINVAL;
1991         }
1992
1993         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1994                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 
1995                                           snd_pcm_hw_rule_rate, hw,
1996                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1997                 if (err < 0)
1998                         return err;
1999         }
2000
2001         /* FIXME: this belong to lowlevel */
2002         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2003
2004         return 0;
2005 }
2006
2007 static void pcm_release_private(struct snd_pcm_substream *substream)
2008 {
2009         snd_pcm_unlink(substream);
2010 }
2011
2012 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2013 {
2014         substream->ref_count--;
2015         if (substream->ref_count > 0)
2016                 return;
2017
2018         snd_pcm_drop(substream);
2019         if (substream->hw_opened) {
2020                 if (substream->ops->hw_free != NULL)
2021                         substream->ops->hw_free(substream);
2022                 substream->ops->close(substream);
2023                 substream->hw_opened = 0;
2024         }
2025         if (pm_qos_request_active(&substream->latency_pm_qos_req))
2026                 pm_qos_remove_request(&substream->latency_pm_qos_req);
2027         if (substream->pcm_release) {
2028                 substream->pcm_release(substream);
2029                 substream->pcm_release = NULL;
2030         }
2031         snd_pcm_detach_substream(substream);
2032 }
2033
2034 EXPORT_SYMBOL(snd_pcm_release_substream);
2035
2036 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2037                            struct file *file,
2038                            struct snd_pcm_substream **rsubstream)
2039 {
2040         struct snd_pcm_substream *substream;
2041         int err;
2042
2043         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2044         if (err < 0)
2045                 return err;
2046         if (substream->ref_count > 1) {
2047                 *rsubstream = substream;
2048                 return 0;
2049         }
2050
2051         err = snd_pcm_hw_constraints_init(substream);
2052         if (err < 0) {
2053                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2054                 goto error;
2055         }
2056
2057         if ((err = substream->ops->open(substream)) < 0)
2058                 goto error;
2059
2060         substream->hw_opened = 1;
2061
2062         err = snd_pcm_hw_constraints_complete(substream);
2063         if (err < 0) {
2064                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2065                 goto error;
2066         }
2067
2068         *rsubstream = substream;
2069         return 0;
2070
2071  error:
2072         snd_pcm_release_substream(substream);
2073         return err;
2074 }
2075
2076 EXPORT_SYMBOL(snd_pcm_open_substream);
2077
2078 static int snd_pcm_open_file(struct file *file,
2079                              struct snd_pcm *pcm,
2080                              int stream)
2081 {
2082         struct snd_pcm_file *pcm_file;
2083         struct snd_pcm_substream *substream;
2084         int err;
2085
2086         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2087         if (err < 0)
2088                 return err;
2089
2090         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2091         if (pcm_file == NULL) {
2092                 snd_pcm_release_substream(substream);
2093                 return -ENOMEM;
2094         }
2095         pcm_file->substream = substream;
2096         if (substream->ref_count == 1) {
2097                 substream->file = pcm_file;
2098                 substream->pcm_release = pcm_release_private;
2099         }
2100         file->private_data = pcm_file;
2101
2102         return 0;
2103 }
2104
2105 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2106 {
2107         struct snd_pcm *pcm;
2108         int err = nonseekable_open(inode, file);
2109         if (err < 0)
2110                 return err;
2111         pcm = snd_lookup_minor_data(iminor(inode),
2112                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2113         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2114         if (pcm)
2115                 snd_card_unref(pcm->card);
2116         return err;
2117 }
2118
2119 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2120 {
2121         struct snd_pcm *pcm;
2122         int err = nonseekable_open(inode, file);
2123         if (err < 0)
2124                 return err;
2125         pcm = snd_lookup_minor_data(iminor(inode),
2126                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2127         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2128         if (pcm)
2129                 snd_card_unref(pcm->card);
2130         return err;
2131 }
2132
2133 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2134 {
2135         int err;
2136         wait_queue_t wait;
2137
2138         if (pcm == NULL) {
2139                 err = -ENODEV;
2140                 goto __error1;
2141         }
2142         err = snd_card_file_add(pcm->card, file);
2143         if (err < 0)
2144                 goto __error1;
2145         if (!try_module_get(pcm->card->module)) {
2146                 err = -EFAULT;
2147                 goto __error2;
2148         }
2149         init_waitqueue_entry(&wait, current);
2150         add_wait_queue(&pcm->open_wait, &wait);
2151         mutex_lock(&pcm->open_mutex);
2152         while (1) {
2153                 err = snd_pcm_open_file(file, pcm, stream);
2154                 if (err >= 0)
2155                         break;
2156                 if (err == -EAGAIN) {
2157                         if (file->f_flags & O_NONBLOCK) {
2158                                 err = -EBUSY;
2159                                 break;
2160                         }
2161                 } else
2162                         break;
2163                 set_current_state(TASK_INTERRUPTIBLE);
2164                 mutex_unlock(&pcm->open_mutex);
2165                 schedule();
2166                 mutex_lock(&pcm->open_mutex);
2167                 if (pcm->card->shutdown) {
2168                         err = -ENODEV;
2169                         break;
2170                 }
2171                 if (signal_pending(current)) {
2172                         err = -ERESTARTSYS;
2173                         break;
2174                 }
2175         }
2176         remove_wait_queue(&pcm->open_wait, &wait);
2177         mutex_unlock(&pcm->open_mutex);
2178         if (err < 0)
2179                 goto __error;
2180         return err;
2181
2182       __error:
2183         module_put(pcm->card->module);
2184       __error2:
2185         snd_card_file_remove(pcm->card, file);
2186       __error1:
2187         return err;
2188 }
2189
2190 static int snd_pcm_release(struct inode *inode, struct file *file)
2191 {
2192         struct snd_pcm *pcm;
2193         struct snd_pcm_substream *substream;
2194         struct snd_pcm_file *pcm_file;
2195
2196         pcm_file = file->private_data;
2197         substream = pcm_file->substream;
2198         if (snd_BUG_ON(!substream))
2199                 return -ENXIO;
2200         pcm = substream->pcm;
2201         mutex_lock(&pcm->open_mutex);
2202         snd_pcm_release_substream(substream);
2203         kfree(pcm_file);
2204         mutex_unlock(&pcm->open_mutex);
2205         wake_up(&pcm->open_wait);
2206         module_put(pcm->card->module);
2207         snd_card_file_remove(pcm->card, file);
2208         return 0;
2209 }
2210
2211 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2212                                                  snd_pcm_uframes_t frames)
2213 {
2214         struct snd_pcm_runtime *runtime = substream->runtime;
2215         snd_pcm_sframes_t appl_ptr;
2216         snd_pcm_sframes_t ret;
2217         snd_pcm_sframes_t hw_avail;
2218
2219         if (frames == 0)
2220                 return 0;
2221
2222         snd_pcm_stream_lock_irq(substream);
2223         switch (runtime->status->state) {
2224         case SNDRV_PCM_STATE_PREPARED:
2225                 break;
2226         case SNDRV_PCM_STATE_DRAINING:
2227         case SNDRV_PCM_STATE_RUNNING:
2228                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2229                         break;
2230                 /* Fall through */
2231         case SNDRV_PCM_STATE_XRUN:
2232                 ret = -EPIPE;
2233                 goto __end;
2234         case SNDRV_PCM_STATE_SUSPENDED:
2235                 ret = -ESTRPIPE;
2236                 goto __end;
2237         default:
2238                 ret = -EBADFD;
2239                 goto __end;
2240         }
2241
2242         hw_avail = snd_pcm_playback_hw_avail(runtime);
2243         if (hw_avail <= 0) {
2244                 ret = 0;
2245                 goto __end;
2246         }
2247         if (frames > (snd_pcm_uframes_t)hw_avail)
2248                 frames = hw_avail;
2249         appl_ptr = runtime->control->appl_ptr - frames;
2250         if (appl_ptr < 0)
2251                 appl_ptr += runtime->boundary;
2252         runtime->control->appl_ptr = appl_ptr;
2253         ret = frames;
2254  __end:
2255         snd_pcm_stream_unlock_irq(substream);
2256         return ret;
2257 }
2258
2259 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2260                                                 snd_pcm_uframes_t frames)
2261 {
2262         struct snd_pcm_runtime *runtime = substream->runtime;
2263         snd_pcm_sframes_t appl_ptr;
2264         snd_pcm_sframes_t ret;
2265         snd_pcm_sframes_t hw_avail;
2266
2267         if (frames == 0)
2268                 return 0;
2269
2270         snd_pcm_stream_lock_irq(substream);
2271         switch (runtime->status->state) {
2272         case SNDRV_PCM_STATE_PREPARED:
2273         case SNDRV_PCM_STATE_DRAINING:
2274                 break;
2275         case SNDRV_PCM_STATE_RUNNING:
2276                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2277                         break;
2278                 /* Fall through */
2279         case SNDRV_PCM_STATE_XRUN:
2280                 ret = -EPIPE;
2281                 goto __end;
2282         case SNDRV_PCM_STATE_SUSPENDED:
2283                 ret = -ESTRPIPE;
2284                 goto __end;
2285         default:
2286                 ret = -EBADFD;
2287                 goto __end;
2288         }
2289
2290         hw_avail = snd_pcm_capture_hw_avail(runtime);
2291         if (hw_avail <= 0) {
2292                 ret = 0;
2293                 goto __end;
2294         }
2295         if (frames > (snd_pcm_uframes_t)hw_avail)
2296                 frames = hw_avail;
2297         appl_ptr = runtime->control->appl_ptr - frames;
2298         if (appl_ptr < 0)
2299                 appl_ptr += runtime->boundary;
2300         runtime->control->appl_ptr = appl_ptr;
2301         ret = frames;
2302  __end:
2303         snd_pcm_stream_unlock_irq(substream);
2304         return ret;
2305 }
2306
2307 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2308                                                   snd_pcm_uframes_t frames)
2309 {
2310         struct snd_pcm_runtime *runtime = substream->runtime;
2311         snd_pcm_sframes_t appl_ptr;
2312         snd_pcm_sframes_t ret;
2313         snd_pcm_sframes_t avail;
2314
2315         if (frames == 0)
2316                 return 0;
2317
2318         snd_pcm_stream_lock_irq(substream);
2319         switch (runtime->status->state) {
2320         case SNDRV_PCM_STATE_PREPARED:
2321         case SNDRV_PCM_STATE_PAUSED:
2322                 break;
2323         case SNDRV_PCM_STATE_DRAINING:
2324         case SNDRV_PCM_STATE_RUNNING:
2325                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2326                         break;
2327                 /* Fall through */
2328         case SNDRV_PCM_STATE_XRUN:
2329                 ret = -EPIPE;
2330                 goto __end;
2331         case SNDRV_PCM_STATE_SUSPENDED:
2332                 ret = -ESTRPIPE;
2333                 goto __end;
2334         default:
2335                 ret = -EBADFD;
2336                 goto __end;
2337         }
2338
2339         avail = snd_pcm_playback_avail(runtime);
2340         if (avail <= 0) {
2341                 ret = 0;
2342                 goto __end;
2343         }
2344         if (frames > (snd_pcm_uframes_t)avail)
2345                 frames = avail;
2346         appl_ptr = runtime->control->appl_ptr + frames;
2347         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2348                 appl_ptr -= runtime->boundary;
2349         runtime->control->appl_ptr = appl_ptr;
2350         ret = frames;
2351  __end:
2352         snd_pcm_stream_unlock_irq(substream);
2353         return ret;
2354 }
2355
2356 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2357                                                  snd_pcm_uframes_t frames)
2358 {
2359         struct snd_pcm_runtime *runtime = substream->runtime;
2360         snd_pcm_sframes_t appl_ptr;
2361         snd_pcm_sframes_t ret;
2362         snd_pcm_sframes_t avail;
2363
2364         if (frames == 0)
2365                 return 0;
2366
2367         snd_pcm_stream_lock_irq(substream);
2368         switch (runtime->status->state) {
2369         case SNDRV_PCM_STATE_PREPARED:
2370         case SNDRV_PCM_STATE_DRAINING:
2371         case SNDRV_PCM_STATE_PAUSED:
2372                 break;
2373         case SNDRV_PCM_STATE_RUNNING:
2374                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2375                         break;
2376                 /* Fall through */
2377         case SNDRV_PCM_STATE_XRUN:
2378                 ret = -EPIPE;
2379                 goto __end;
2380         case SNDRV_PCM_STATE_SUSPENDED:
2381                 ret = -ESTRPIPE;
2382                 goto __end;
2383         default:
2384                 ret = -EBADFD;
2385                 goto __end;
2386         }
2387
2388         avail = snd_pcm_capture_avail(runtime);
2389         if (avail <= 0) {
2390                 ret = 0;
2391                 goto __end;
2392         }
2393         if (frames > (snd_pcm_uframes_t)avail)
2394                 frames = avail;
2395         appl_ptr = runtime->control->appl_ptr + frames;
2396         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2397                 appl_ptr -= runtime->boundary;
2398         runtime->control->appl_ptr = appl_ptr;
2399         ret = frames;
2400  __end:
2401         snd_pcm_stream_unlock_irq(substream);
2402         return ret;
2403 }
2404
2405 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2406 {
2407         struct snd_pcm_runtime *runtime = substream->runtime;
2408         int err;
2409
2410         snd_pcm_stream_lock_irq(substream);
2411         switch (runtime->status->state) {
2412         case SNDRV_PCM_STATE_DRAINING:
2413                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2414                         goto __badfd;
2415         case SNDRV_PCM_STATE_RUNNING:
2416                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2417                         break;
2418                 /* Fall through */
2419         case SNDRV_PCM_STATE_PREPARED:
2420         case SNDRV_PCM_STATE_SUSPENDED:
2421                 err = 0;
2422                 break;
2423         case SNDRV_PCM_STATE_XRUN:
2424                 err = -EPIPE;
2425                 break;
2426         default:
2427               __badfd:
2428                 err = -EBADFD;
2429                 break;
2430         }
2431         snd_pcm_stream_unlock_irq(substream);
2432         return err;
2433 }
2434                 
2435 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2436                          snd_pcm_sframes_t __user *res)
2437 {
2438         struct snd_pcm_runtime *runtime = substream->runtime;
2439         int err;
2440         snd_pcm_sframes_t n = 0;
2441
2442         snd_pcm_stream_lock_irq(substream);
2443         switch (runtime->status->state) {
2444         case SNDRV_PCM_STATE_DRAINING:
2445                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2446                         goto __badfd;
2447         case SNDRV_PCM_STATE_RUNNING:
2448                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2449                         break;
2450                 /* Fall through */
2451         case SNDRV_PCM_STATE_PREPARED:
2452         case SNDRV_PCM_STATE_SUSPENDED:
2453                 err = 0;
2454                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2455                         n = snd_pcm_playback_hw_avail(runtime);
2456                 else
2457                         n = snd_pcm_capture_avail(runtime);
2458                 n += runtime->delay;
2459                 break;
2460         case SNDRV_PCM_STATE_XRUN:
2461                 err = -EPIPE;
2462                 break;
2463         default:
2464               __badfd:
2465                 err = -EBADFD;
2466                 break;
2467         }
2468         snd_pcm_stream_unlock_irq(substream);
2469         if (!err)
2470                 if (put_user(n, res))
2471                         err = -EFAULT;
2472         return err;
2473 }
2474                 
2475 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2476                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2477 {
2478         struct snd_pcm_runtime *runtime = substream->runtime;
2479         struct snd_pcm_sync_ptr sync_ptr;
2480         volatile struct snd_pcm_mmap_status *status;
2481         volatile struct snd_pcm_mmap_control *control;
2482         int err;
2483
2484         memset(&sync_ptr, 0, sizeof(sync_ptr));
2485         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2486                 return -EFAULT;
2487         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2488                 return -EFAULT; 
2489         status = runtime->status;
2490         control = runtime->control;
2491         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2492                 err = snd_pcm_hwsync(substream);
2493                 if (err < 0)
2494                         return err;
2495         }
2496         snd_pcm_stream_lock_irq(substream);
2497         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2498                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2499         else
2500                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2501         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2502                 control->avail_min = sync_ptr.c.control.avail_min;
2503         else
2504                 sync_ptr.c.control.avail_min = control->avail_min;
2505         sync_ptr.s.status.state = status->state;
2506         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2507         sync_ptr.s.status.tstamp = status->tstamp;
2508         sync_ptr.s.status.suspended_state = status->suspended_state;
2509         snd_pcm_stream_unlock_irq(substream);
2510         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2511                 return -EFAULT;
2512         return 0;
2513 }
2514
2515 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2516 {
2517         struct snd_pcm_runtime *runtime = substream->runtime;
2518         int arg;
2519         
2520         if (get_user(arg, _arg))
2521                 return -EFAULT;
2522         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2523                 return -EINVAL;
2524         runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2525         if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2526                 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2527         return 0;
2528 }
2529                 
2530 static int snd_pcm_common_ioctl1(struct file *file,
2531                                  struct snd_pcm_substream *substream,
2532                                  unsigned int cmd, void __user *arg)
2533 {
2534         switch (cmd) {
2535         case SNDRV_PCM_IOCTL_PVERSION:
2536                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2537         case SNDRV_PCM_IOCTL_INFO:
2538                 return snd_pcm_info_user(substream, arg);
2539         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2540                 return 0;
2541         case SNDRV_PCM_IOCTL_TTSTAMP:
2542                 return snd_pcm_tstamp(substream, arg);
2543         case SNDRV_PCM_IOCTL_HW_REFINE:
2544                 return snd_pcm_hw_refine_user(substream, arg);
2545         case SNDRV_PCM_IOCTL_HW_PARAMS:
2546                 return snd_pcm_hw_params_user(substream, arg);
2547         case SNDRV_PCM_IOCTL_HW_FREE:
2548                 return snd_pcm_hw_free(substream);
2549         case SNDRV_PCM_IOCTL_SW_PARAMS:
2550                 return snd_pcm_sw_params_user(substream, arg);
2551         case SNDRV_PCM_IOCTL_STATUS:
2552                 return snd_pcm_status_user(substream, arg);
2553         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2554                 return snd_pcm_channel_info_user(substream, arg);
2555         case SNDRV_PCM_IOCTL_PREPARE:
2556                 return snd_pcm_prepare(substream, file);
2557         case SNDRV_PCM_IOCTL_RESET:
2558                 return snd_pcm_reset(substream);
2559         case SNDRV_PCM_IOCTL_START:
2560                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2561         case SNDRV_PCM_IOCTL_LINK:
2562                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2563         case SNDRV_PCM_IOCTL_UNLINK:
2564                 return snd_pcm_unlink(substream);
2565         case SNDRV_PCM_IOCTL_RESUME:
2566                 return snd_pcm_resume(substream);
2567         case SNDRV_PCM_IOCTL_XRUN:
2568                 return snd_pcm_xrun(substream);
2569         case SNDRV_PCM_IOCTL_HWSYNC:
2570                 return snd_pcm_hwsync(substream);
2571         case SNDRV_PCM_IOCTL_DELAY:
2572                 return snd_pcm_delay(substream, arg);
2573         case SNDRV_PCM_IOCTL_SYNC_PTR:
2574                 return snd_pcm_sync_ptr(substream, arg);
2575 #ifdef CONFIG_SND_SUPPORT_OLD_API
2576         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2577                 return snd_pcm_hw_refine_old_user(substream, arg);
2578         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2579                 return snd_pcm_hw_params_old_user(substream, arg);
2580 #endif
2581         case SNDRV_PCM_IOCTL_DRAIN:
2582                 return snd_pcm_drain(substream, file);
2583         case SNDRV_PCM_IOCTL_DROP:
2584                 return snd_pcm_drop(substream);
2585         case SNDRV_PCM_IOCTL_PAUSE:
2586         {
2587                 int res;
2588                 snd_pcm_stream_lock_irq(substream);
2589                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2590                 snd_pcm_stream_unlock_irq(substream);
2591                 return res;
2592         }
2593         }
2594         snd_printd("unknown ioctl = 0x%x\n", cmd);
2595         return -ENOTTY;
2596 }
2597
2598 static int snd_pcm_playback_ioctl1(struct file *file,
2599                                    struct snd_pcm_substream *substream,
2600                                    unsigned int cmd, void __user *arg)
2601 {
2602         if (snd_BUG_ON(!substream))
2603                 return -ENXIO;
2604         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2605                 return -EINVAL;
2606         switch (cmd) {
2607         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2608         {
2609                 struct snd_xferi xferi;
2610                 struct snd_xferi __user *_xferi = arg;
2611                 struct snd_pcm_runtime *runtime = substream->runtime;
2612                 snd_pcm_sframes_t result;
2613                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2614                         return -EBADFD;
2615                 if (put_user(0, &_xferi->result))
2616                         return -EFAULT;
2617                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2618                         return -EFAULT;
2619                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2620                 __put_user(result, &_xferi->result);
2621                 return result < 0 ? result : 0;
2622         }
2623         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2624         {
2625                 struct snd_xfern xfern;
2626                 struct snd_xfern __user *_xfern = arg;
2627                 struct snd_pcm_runtime *runtime = substream->runtime;
2628                 void __user **bufs;
2629                 snd_pcm_sframes_t result;
2630                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2631                         return -EBADFD;
2632                 if (runtime->channels > 128)
2633                         return -EINVAL;
2634                 if (put_user(0, &_xfern->result))
2635                         return -EFAULT;
2636                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2637                         return -EFAULT;
2638
2639                 bufs = memdup_user(xfern.bufs,
2640                                    sizeof(void *) * runtime->channels);
2641                 if (IS_ERR(bufs))
2642                         return PTR_ERR(bufs);
2643                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2644                 kfree(bufs);
2645                 __put_user(result, &_xfern->result);
2646                 return result < 0 ? result : 0;
2647         }
2648         case SNDRV_PCM_IOCTL_REWIND:
2649         {
2650                 snd_pcm_uframes_t frames;
2651                 snd_pcm_uframes_t __user *_frames = arg;
2652                 snd_pcm_sframes_t result;
2653                 if (get_user(frames, _frames))
2654                         return -EFAULT;
2655                 if (put_user(0, _frames))
2656                         return -EFAULT;
2657                 result = snd_pcm_playback_rewind(substream, frames);
2658                 __put_user(result, _frames);
2659                 return result < 0 ? result : 0;
2660         }
2661         case SNDRV_PCM_IOCTL_FORWARD:
2662         {
2663                 snd_pcm_uframes_t frames;
2664                 snd_pcm_uframes_t __user *_frames = arg;
2665                 snd_pcm_sframes_t result;
2666                 if (get_user(frames, _frames))
2667                         return -EFAULT;
2668                 if (put_user(0, _frames))
2669                         return -EFAULT;
2670                 result = snd_pcm_playback_forward(substream, frames);
2671                 __put_user(result, _frames);
2672                 return result < 0 ? result : 0;
2673         }
2674         }
2675         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2676 }
2677
2678 static int snd_pcm_capture_ioctl1(struct file *file,
2679                                   struct snd_pcm_substream *substream,
2680                                   unsigned int cmd, void __user *arg)
2681 {
2682         if (snd_BUG_ON(!substream))
2683                 return -ENXIO;
2684         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2685                 return -EINVAL;
2686         switch (cmd) {
2687         case SNDRV_PCM_IOCTL_READI_FRAMES:
2688         {
2689                 struct snd_xferi xferi;
2690                 struct snd_xferi __user *_xferi = arg;
2691                 struct snd_pcm_runtime *runtime = substream->runtime;
2692                 snd_pcm_sframes_t result;
2693                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2694                         return -EBADFD;
2695                 if (put_user(0, &_xferi->result))
2696                         return -EFAULT;
2697                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2698                         return -EFAULT;
2699                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2700                 __put_user(result, &_xferi->result);
2701                 return result < 0 ? result : 0;
2702         }
2703         case SNDRV_PCM_IOCTL_READN_FRAMES:
2704         {
2705                 struct snd_xfern xfern;
2706                 struct snd_xfern __user *_xfern = arg;
2707                 struct snd_pcm_runtime *runtime = substream->runtime;
2708                 void *bufs;
2709                 snd_pcm_sframes_t result;
2710                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2711                         return -EBADFD;
2712                 if (runtime->channels > 128)
2713                         return -EINVAL;
2714                 if (put_user(0, &_xfern->result))
2715                         return -EFAULT;
2716                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2717                         return -EFAULT;
2718
2719                 bufs = memdup_user(xfern.bufs,
2720                                    sizeof(void *) * runtime->channels);
2721                 if (IS_ERR(bufs))
2722                         return PTR_ERR(bufs);
2723                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2724                 kfree(bufs);
2725                 __put_user(result, &_xfern->result);
2726                 return result < 0 ? result : 0;
2727         }
2728         case SNDRV_PCM_IOCTL_REWIND:
2729         {
2730                 snd_pcm_uframes_t frames;
2731                 snd_pcm_uframes_t __user *_frames = arg;
2732                 snd_pcm_sframes_t result;
2733                 if (get_user(frames, _frames))
2734                         return -EFAULT;
2735                 if (put_user(0, _frames))
2736                         return -EFAULT;
2737                 result = snd_pcm_capture_rewind(substream, frames);
2738                 __put_user(result, _frames);
2739                 return result < 0 ? result : 0;
2740         }
2741         case SNDRV_PCM_IOCTL_FORWARD:
2742         {
2743                 snd_pcm_uframes_t frames;
2744                 snd_pcm_uframes_t __user *_frames = arg;
2745                 snd_pcm_sframes_t result;
2746                 if (get_user(frames, _frames))
2747                         return -EFAULT;
2748                 if (put_user(0, _frames))
2749                         return -EFAULT;
2750                 result = snd_pcm_capture_forward(substream, frames);
2751                 __put_user(result, _frames);
2752                 return result < 0 ? result : 0;
2753         }
2754         }
2755         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2756 }
2757
2758 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2759                                    unsigned long arg)
2760 {
2761         struct snd_pcm_file *pcm_file;
2762
2763         pcm_file = file->private_data;
2764
2765         if (((cmd >> 8) & 0xff) != 'A')
2766                 return -ENOTTY;
2767
2768         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2769                                        (void __user *)arg);
2770 }
2771
2772 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2773                                   unsigned long arg)
2774 {
2775         struct snd_pcm_file *pcm_file;
2776
2777         pcm_file = file->private_data;
2778
2779         if (((cmd >> 8) & 0xff) != 'A')
2780                 return -ENOTTY;
2781
2782         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2783                                       (void __user *)arg);
2784 }
2785
2786 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2787                          unsigned int cmd, void *arg)
2788 {
2789         mm_segment_t fs;
2790         int result;
2791         
2792         fs = snd_enter_user();
2793         switch (substream->stream) {
2794         case SNDRV_PCM_STREAM_PLAYBACK:
2795                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2796                                                  (void __user *)arg);
2797                 break;
2798         case SNDRV_PCM_STREAM_CAPTURE:
2799                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2800                                                 (void __user *)arg);
2801                 break;
2802         default:
2803                 result = -EINVAL;
2804                 break;
2805         }
2806         snd_leave_user(fs);
2807         return result;
2808 }
2809
2810 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2811
2812 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2813                             loff_t * offset)
2814 {
2815         struct snd_pcm_file *pcm_file;
2816         struct snd_pcm_substream *substream;
2817         struct snd_pcm_runtime *runtime;
2818         snd_pcm_sframes_t result;
2819
2820         pcm_file = file->private_data;
2821         substream = pcm_file->substream;
2822         if (PCM_RUNTIME_CHECK(substream))
2823                 return -ENXIO;
2824         runtime = substream->runtime;
2825         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2826                 return -EBADFD;
2827         if (!frame_aligned(runtime, count))
2828                 return -EINVAL;
2829         count = bytes_to_frames(runtime, count);
2830         result = snd_pcm_lib_read(substream, buf, count);
2831         if (result > 0)
2832                 result = frames_to_bytes(runtime, result);
2833         return result;
2834 }
2835
2836 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2837                              size_t count, loff_t * offset)
2838 {
2839         struct snd_pcm_file *pcm_file;
2840         struct snd_pcm_substream *substream;
2841         struct snd_pcm_runtime *runtime;
2842         snd_pcm_sframes_t result;
2843
2844         pcm_file = file->private_data;
2845         substream = pcm_file->substream;
2846         if (PCM_RUNTIME_CHECK(substream))
2847                 return -ENXIO;
2848         runtime = substream->runtime;
2849         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2850                 return -EBADFD;
2851         if (!frame_aligned(runtime, count))
2852                 return -EINVAL;
2853         count = bytes_to_frames(runtime, count);
2854         result = snd_pcm_lib_write(substream, buf, count);
2855         if (result > 0)
2856                 result = frames_to_bytes(runtime, result);
2857         return result;
2858 }
2859
2860 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2861                              unsigned long nr_segs, loff_t pos)
2862
2863 {
2864         struct snd_pcm_file *pcm_file;
2865         struct snd_pcm_substream *substream;
2866         struct snd_pcm_runtime *runtime;
2867         snd_pcm_sframes_t result;
2868         unsigned long i;
2869         void __user **bufs;
2870         snd_pcm_uframes_t frames;
2871
2872         pcm_file = iocb->ki_filp->private_data;
2873         substream = pcm_file->substream;
2874         if (PCM_RUNTIME_CHECK(substream))
2875                 return -ENXIO;
2876         runtime = substream->runtime;
2877         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2878                 return -EBADFD;
2879         if (nr_segs > 1024 || nr_segs != runtime->channels)
2880                 return -EINVAL;
2881         if (!frame_aligned(runtime, iov->iov_len))
2882                 return -EINVAL;
2883         frames = bytes_to_samples(runtime, iov->iov_len);
2884         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2885         if (bufs == NULL)
2886                 return -ENOMEM;
2887         for (i = 0; i < nr_segs; ++i)
2888                 bufs[i] = iov[i].iov_base;
2889         result = snd_pcm_lib_readv(substream, bufs, frames);
2890         if (result > 0)
2891                 result = frames_to_bytes(runtime, result);
2892         kfree(bufs);
2893         return result;
2894 }
2895
2896 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2897                               unsigned long nr_segs, loff_t pos)
2898 {
2899         struct snd_pcm_file *pcm_file;
2900         struct snd_pcm_substream *substream;
2901         struct snd_pcm_runtime *runtime;
2902         snd_pcm_sframes_t result;
2903         unsigned long i;
2904         void __user **bufs;
2905         snd_pcm_uframes_t frames;
2906
2907         pcm_file = iocb->ki_filp->private_data;
2908         substream = pcm_file->substream;
2909         if (PCM_RUNTIME_CHECK(substream))
2910                 return -ENXIO;
2911         runtime = substream->runtime;
2912         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2913                 return -EBADFD;
2914         if (nr_segs > 128 || nr_segs != runtime->channels ||
2915             !frame_aligned(runtime, iov->iov_len))
2916                 return -EINVAL;
2917         frames = bytes_to_samples(runtime, iov->iov_len);
2918         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2919         if (bufs == NULL)
2920                 return -ENOMEM;
2921         for (i = 0; i < nr_segs; ++i)
2922                 bufs[i] = iov[i].iov_base;
2923         result = snd_pcm_lib_writev(substream, bufs, frames);
2924         if (result > 0)
2925                 result = frames_to_bytes(runtime, result);
2926         kfree(bufs);
2927         return result;
2928 }
2929
2930 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2931 {
2932         struct snd_pcm_file *pcm_file;
2933         struct snd_pcm_substream *substream;
2934         struct snd_pcm_runtime *runtime;
2935         unsigned int mask;
2936         snd_pcm_uframes_t avail;
2937
2938         pcm_file = file->private_data;
2939
2940         substream = pcm_file->substream;
2941         if (PCM_RUNTIME_CHECK(substream))
2942                 return -ENXIO;
2943         runtime = substream->runtime;
2944
2945         poll_wait(file, &runtime->sleep, wait);
2946
2947         snd_pcm_stream_lock_irq(substream);
2948         avail = snd_pcm_playback_avail(runtime);
2949         switch (runtime->status->state) {
2950         case SNDRV_PCM_STATE_RUNNING:
2951         case SNDRV_PCM_STATE_PREPARED:
2952         case SNDRV_PCM_STATE_PAUSED:
2953                 if (avail >= runtime->control->avail_min) {
2954                         mask = POLLOUT | POLLWRNORM;
2955                         break;
2956                 }
2957                 /* Fall through */
2958         case SNDRV_PCM_STATE_DRAINING:
2959                 mask = 0;
2960                 break;
2961         default:
2962                 mask = POLLOUT | POLLWRNORM | POLLERR;
2963                 break;
2964         }
2965         snd_pcm_stream_unlock_irq(substream);
2966         return mask;
2967 }
2968
2969 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2970 {
2971         struct snd_pcm_file *pcm_file;
2972         struct snd_pcm_substream *substream;
2973         struct snd_pcm_runtime *runtime;
2974         unsigned int mask;
2975         snd_pcm_uframes_t avail;
2976
2977         pcm_file = file->private_data;
2978
2979         substream = pcm_file->substream;
2980         if (PCM_RUNTIME_CHECK(substream))
2981                 return -ENXIO;
2982         runtime = substream->runtime;
2983
2984         poll_wait(file, &runtime->sleep, wait);
2985
2986         snd_pcm_stream_lock_irq(substream);
2987         avail = snd_pcm_capture_avail(runtime);
2988         switch (runtime->status->state) {
2989         case SNDRV_PCM_STATE_RUNNING:
2990         case SNDRV_PCM_STATE_PREPARED:
2991         case SNDRV_PCM_STATE_PAUSED:
2992                 if (avail >= runtime->control->avail_min) {
2993                         mask = POLLIN | POLLRDNORM;
2994                         break;
2995                 }
2996                 mask = 0;
2997                 break;
2998         case SNDRV_PCM_STATE_DRAINING:
2999                 if (avail > 0) {
3000                         mask = POLLIN | POLLRDNORM;
3001                         break;
3002                 }
3003                 /* Fall through */
3004         default:
3005                 mask = POLLIN | POLLRDNORM | POLLERR;
3006                 break;
3007         }
3008         snd_pcm_stream_unlock_irq(substream);
3009         return mask;
3010 }
3011
3012 /*
3013  * mmap support
3014  */
3015
3016 /*
3017  * Only on coherent architectures, we can mmap the status and the control records
3018  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
3019  */
3020 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3021 /*
3022  * mmap status record
3023  */
3024 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3025                                                 struct vm_fault *vmf)
3026 {
3027         struct snd_pcm_substream *substream = area->vm_private_data;
3028         struct snd_pcm_runtime *runtime;
3029         
3030         if (substream == NULL)
3031                 return VM_FAULT_SIGBUS;
3032         runtime = substream->runtime;
3033         vmf->page = virt_to_page(runtime->status);
3034         get_page(vmf->page);
3035         return 0;
3036 }
3037
3038 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3039 {
3040         .fault =        snd_pcm_mmap_status_fault,
3041 };
3042
3043 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3044                                struct vm_area_struct *area)
3045 {
3046         long size;
3047         if (!(area->vm_flags & VM_READ))
3048                 return -EINVAL;
3049         size = area->vm_end - area->vm_start;
3050         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3051                 return -EINVAL;
3052         area->vm_ops = &snd_pcm_vm_ops_status;
3053         area->vm_private_data = substream;
3054         area->vm_flags |= VM_RESERVED;
3055         return 0;
3056 }
3057
3058 /*
3059  * mmap control record
3060  */
3061 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3062                                                 struct vm_fault *vmf)
3063 {
3064         struct snd_pcm_substream *substream = area->vm_private_data;
3065         struct snd_pcm_runtime *runtime;
3066         
3067         if (substream == NULL)
3068                 return VM_FAULT_SIGBUS;
3069         runtime = substream->runtime;
3070         vmf->page = virt_to_page(runtime->control);
3071         get_page(vmf->page);
3072         return 0;
3073 }
3074
3075 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3076 {
3077         .fault =        snd_pcm_mmap_control_fault,
3078 };
3079
3080 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3081                                 struct vm_area_struct *area)
3082 {
3083         long size;
3084         if (!(area->vm_flags & VM_READ))
3085                 return -EINVAL;
3086         size = area->vm_end - area->vm_start;
3087         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3088                 return -EINVAL;
3089         area->vm_ops = &snd_pcm_vm_ops_control;
3090         area->vm_private_data = substream;
3091         area->vm_flags |= VM_RESERVED;
3092         return 0;
3093 }
3094 #else /* ! coherent mmap */
3095 /*
3096  * don't support mmap for status and control records.
3097  */
3098 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3099                                struct vm_area_struct *area)
3100 {
3101         return -ENXIO;
3102 }
3103 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3104                                 struct vm_area_struct *area)
3105 {
3106         return -ENXIO;
3107 }
3108 #endif /* coherent mmap */
3109
3110 static inline struct page *
3111 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3112 {
3113         void *vaddr = substream->runtime->dma_area + ofs;
3114 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3115         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3116                 return virt_to_page(CAC_ADDR(vaddr));
3117 #endif
3118 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3119         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3120                 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3121                 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3122                 /* assume dma_handle set via pfn_to_phys() in
3123                  * mm/dma-noncoherent.c
3124                  */
3125                 return pfn_to_page(addr >> PAGE_SHIFT);
3126         }
3127 #endif
3128         return virt_to_page(vaddr);
3129 }
3130
3131 /*
3132  * fault callback for mmapping a RAM page
3133  */
3134 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3135                                                 struct vm_fault *vmf)
3136 {
3137         struct snd_pcm_substream *substream = area->vm_private_data;
3138         struct snd_pcm_runtime *runtime;
3139         unsigned long offset;
3140         struct page * page;
3141         size_t dma_bytes;
3142         
3143         if (substream == NULL)
3144                 return VM_FAULT_SIGBUS;
3145         runtime = substream->runtime;
3146         offset = vmf->pgoff << PAGE_SHIFT;
3147         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3148         if (offset > dma_bytes - PAGE_SIZE)
3149                 return VM_FAULT_SIGBUS;
3150         if (substream->ops->page)
3151                 page = substream->ops->page(substream, offset);
3152         else
3153                 page = snd_pcm_default_page_ops(substream, offset);
3154         if (!page)
3155                 return VM_FAULT_SIGBUS;
3156         get_page(page);
3157         vmf->page = page;
3158         return 0;
3159 }
3160
3161 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3162         .open =         snd_pcm_mmap_data_open,
3163         .close =        snd_pcm_mmap_data_close,
3164 };
3165
3166 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3167         .open =         snd_pcm_mmap_data_open,
3168         .close =        snd_pcm_mmap_data_close,
3169         .fault =        snd_pcm_mmap_data_fault,
3170 };
3171
3172 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3173 /* This should be defined / handled globally! */
3174 #ifdef CONFIG_ARM
3175 #define ARCH_HAS_DMA_MMAP_COHERENT
3176 #endif
3177 #endif
3178
3179 /*
3180  * mmap the DMA buffer on RAM
3181  */
3182 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3183                              struct vm_area_struct *area)
3184 {
3185         area->vm_flags |= VM_RESERVED;
3186 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3187         if (!substream->ops->page &&
3188             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3189                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3190                                          area,
3191                                          substream->runtime->dma_area,
3192                                          substream->runtime->dma_addr,
3193                                          area->vm_end - area->vm_start);
3194 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3195         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3196             !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3197                 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3198 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3199         /* mmap with fault handler */
3200         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3201         return 0;
3202 }
3203 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3204
3205 /*
3206  * mmap the DMA buffer on I/O memory area
3207  */
3208 #if SNDRV_PCM_INFO_MMAP_IOMEM
3209 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3210                            struct vm_area_struct *area)
3211 {
3212         struct snd_pcm_runtime *runtime = substream->runtime;;
3213
3214         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3215         return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
3216 }
3217
3218 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3219 #endif /* SNDRV_PCM_INFO_MMAP */
3220
3221 /*
3222  * mmap DMA buffer
3223  */
3224 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3225                       struct vm_area_struct *area)
3226 {
3227         struct snd_pcm_runtime *runtime;
3228         long size;
3229         unsigned long offset;
3230         size_t dma_bytes;
3231         int err;
3232
3233         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3234                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3235                         return -EINVAL;
3236         } else {
3237                 if (!(area->vm_flags & VM_READ))
3238                         return -EINVAL;
3239         }
3240         runtime = substream->runtime;
3241         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3242                 return -EBADFD;
3243         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3244                 return -ENXIO;
3245         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3246             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3247                 return -EINVAL;
3248         size = area->vm_end - area->vm_start;
3249         offset = area->vm_pgoff << PAGE_SHIFT;
3250         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3251         if ((size_t)size > dma_bytes)
3252                 return -EINVAL;
3253         if (offset > dma_bytes - size)
3254                 return -EINVAL;
3255
3256         area->vm_ops = &snd_pcm_vm_ops_data;
3257         area->vm_private_data = substream;
3258         if (substream->ops->mmap)
3259                 err = substream->ops->mmap(substream, area);
3260         else
3261                 err = snd_pcm_lib_default_mmap(substream, area);
3262         if (!err)
3263                 atomic_inc(&substream->mmap_count);
3264         return err;
3265 }
3266
3267 EXPORT_SYMBOL(snd_pcm_mmap_data);
3268
3269 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3270 {
3271         struct snd_pcm_file * pcm_file;
3272         struct snd_pcm_substream *substream;    
3273         unsigned long offset;
3274         
3275         pcm_file = file->private_data;
3276         substream = pcm_file->substream;
3277         if (PCM_RUNTIME_CHECK(substream))
3278                 return -ENXIO;
3279
3280         offset = area->vm_pgoff << PAGE_SHIFT;
3281         switch (offset) {
3282         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3283                 if (pcm_file->no_compat_mmap)
3284                         return -ENXIO;
3285                 return snd_pcm_mmap_status(substream, file, area);
3286         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3287                 if (pcm_file->no_compat_mmap)
3288                         return -ENXIO;
3289                 return snd_pcm_mmap_control(substream, file, area);
3290         default:
3291                 return snd_pcm_mmap_data(substream, file, area);
3292         }
3293         return 0;
3294 }
3295
3296 static int snd_pcm_fasync(int fd, struct file * file, int on)
3297 {
3298         struct snd_pcm_file * pcm_file;
3299         struct snd_pcm_substream *substream;
3300         struct snd_pcm_runtime *runtime;
3301
3302         pcm_file = file->private_data;
3303         substream = pcm_file->substream;
3304         if (PCM_RUNTIME_CHECK(substream))
3305                 return -ENXIO;
3306         runtime = substream->runtime;
3307         return fasync_helper(fd, file, on, &runtime->fasync);
3308 }
3309
3310 /*
3311  * ioctl32 compat
3312  */
3313 #ifdef CONFIG_COMPAT
3314 #include "pcm_compat.c"
3315 #else
3316 #define snd_pcm_ioctl_compat    NULL
3317 #endif
3318
3319 /*
3320  *  To be removed helpers to keep binary compatibility
3321  */
3322
3323 #ifdef CONFIG_SND_SUPPORT_OLD_API
3324 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3325 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3326
3327 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3328                                                struct snd_pcm_hw_params_old *oparams)
3329 {
3330         unsigned int i;
3331
3332         memset(params, 0, sizeof(*params));
3333         params->flags = oparams->flags;
3334         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3335                 params->masks[i].bits[0] = oparams->masks[i];
3336         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3337         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3338         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3339         params->info = oparams->info;
3340         params->msbits = oparams->msbits;
3341         params->rate_num = oparams->rate_num;
3342         params->rate_den = oparams->rate_den;
3343         params->fifo_size = oparams->fifo_size;
3344 }
3345
3346 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3347                                              struct snd_pcm_hw_params *params)
3348 {
3349         unsigned int i;
3350
3351         memset(oparams, 0, sizeof(*oparams));
3352         oparams->flags = params->flags;
3353         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3354                 oparams->masks[i] = params->masks[i].bits[0];
3355         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3356         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3357         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3358         oparams->info = params->info;
3359         oparams->msbits = params->msbits;
3360         oparams->rate_num = params->rate_num;
3361         oparams->rate_den = params->rate_den;
3362         oparams->fifo_size = params->fifo_size;
3363 }
3364
3365 static int snd_pcm_hw_refine_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                 return -ENOMEM;
3375
3376         oparams = memdup_user(_oparams, sizeof(*oparams));
3377         if (IS_ERR(oparams)) {
3378                 err = PTR_ERR(oparams);
3379                 goto out;
3380         }
3381         snd_pcm_hw_convert_from_old_params(params, oparams);
3382         err = snd_pcm_hw_refine(substream, params);
3383         snd_pcm_hw_convert_to_old_params(oparams, params);
3384         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3385                 if (!err)
3386                         err = -EFAULT;
3387         }
3388
3389         kfree(oparams);
3390 out:
3391         kfree(params);
3392         return err;
3393 }
3394
3395 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3396                                       struct snd_pcm_hw_params_old __user * _oparams)
3397 {
3398         struct snd_pcm_hw_params *params;
3399         struct snd_pcm_hw_params_old *oparams = NULL;
3400         int err;
3401
3402         params = kmalloc(sizeof(*params), GFP_KERNEL);
3403         if (!params)
3404                 return -ENOMEM;
3405
3406         oparams = memdup_user(_oparams, sizeof(*oparams));
3407         if (IS_ERR(oparams)) {
3408                 err = PTR_ERR(oparams);
3409                 goto out;
3410         }
3411         snd_pcm_hw_convert_from_old_params(params, oparams);
3412         err = snd_pcm_hw_params(substream, params);
3413         snd_pcm_hw_convert_to_old_params(oparams, params);
3414         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3415                 if (!err)
3416                         err = -EFAULT;
3417         }
3418
3419         kfree(oparams);
3420 out:
3421         kfree(params);
3422         return err;
3423 }
3424 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3425
3426 #ifndef CONFIG_MMU
3427 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3428                                                unsigned long addr,
3429                                                unsigned long len,
3430                                                unsigned long pgoff,
3431                                                unsigned long flags)
3432 {
3433         struct snd_pcm_file *pcm_file = file->private_data;
3434         struct snd_pcm_substream *substream = pcm_file->substream;
3435         struct snd_pcm_runtime *runtime = substream->runtime;
3436         unsigned long offset = pgoff << PAGE_SHIFT;
3437
3438         switch (offset) {
3439         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3440                 return (unsigned long)runtime->status;
3441         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3442                 return (unsigned long)runtime->control;
3443         default:
3444                 return (unsigned long)runtime->dma_area + offset;
3445         }
3446 }
3447 #else
3448 # define snd_pcm_get_unmapped_area NULL
3449 #endif
3450
3451 /*
3452  *  Register section
3453  */
3454
3455 const struct file_operations snd_pcm_f_ops[2] = {
3456         {
3457                 .owner =                THIS_MODULE,
3458                 .write =                snd_pcm_write,
3459                 .aio_write =            snd_pcm_aio_write,
3460                 .open =                 snd_pcm_playback_open,
3461                 .release =              snd_pcm_release,
3462                 .llseek =               no_llseek,
3463                 .poll =                 snd_pcm_playback_poll,
3464                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3465                 .compat_ioctl =         snd_pcm_ioctl_compat,
3466                 .mmap =                 snd_pcm_mmap,
3467                 .fasync =               snd_pcm_fasync,
3468                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3469         },
3470         {
3471                 .owner =                THIS_MODULE,
3472                 .read =                 snd_pcm_read,
3473                 .aio_read =             snd_pcm_aio_read,
3474                 .open =                 snd_pcm_capture_open,
3475                 .release =              snd_pcm_release,
3476                 .llseek =               no_llseek,
3477                 .poll =                 snd_pcm_capture_poll,
3478                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3479                 .compat_ioctl =         snd_pcm_ioctl_compat,
3480                 .mmap =                 snd_pcm_mmap,
3481                 .fasync =               snd_pcm_fasync,
3482                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3483         }
3484 };