sound/core/pcm_native.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include <linux/mm.h>
  23 #include <linux/file.h>
  24 #include <linux/slab.h>
  25 #include <linux/smp_lock.h>
  26 #include <linux/time.h>
  27 #include <linux/pm_qos_params.h>
  28 #include <linux/uio.h>
  29 #include <linux/dma-mapping.h>
  30 #include <sound/core.h>
  31 #include <sound/control.h>
  32 #include <sound/info.h>
  33 #include <sound/pcm.h>
  34 #include <sound/pcm_params.h>
  35 #include <sound/timer.h>
  36 #include <sound/minors.h>
  37 #include <asm/io.h>
  38
  39 /*
  40  *  Compatibility
  41  */
  42
  43 struct snd_pcm_hw_params_old {
  44         unsigned int flags;
  45         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
  46                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
  47         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
  48                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
  49         unsigned int rmask;
  50         unsigned int cmask;
  51         unsigned int info;
  52         unsigned int msbits;
  53         unsigned int rate_num;
  54         unsigned int rate_den;
  55         snd_pcm_uframes_t fifo_size;
  56         unsigned char reserved[64];
  57 };
  58
  59 #ifdef CONFIG_SND_SUPPORT_OLD_API
  60 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
  61 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
  62
  63 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
  64                                       struct snd_pcm_hw_params_old __user * _oparams);
  65 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
  66                                       struct snd_pcm_hw_params_old __user * _oparams);
  67 #endif
  68 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
  69
  70 /*
  71  *
  72  */
  73
  74 DEFINE_RWLOCK(snd_pcm_link_rwlock);
  75 EXPORT_SYMBOL(snd_pcm_link_rwlock);
  76
  77 static DECLARE_RWSEM(snd_pcm_link_rwsem);
  78
  79 static inline mm_segment_t snd_enter_user(void)
  80 {
  81         mm_segment_t fs = get_fs();
  82         set_fs(get_ds());
  83         return fs;
  84 }
  85
  86 static inline void snd_leave_user(mm_segment_t fs)
  87 {
  88         set_fs(fs);
  89 }
  90
  91
  92
  93 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
  94 {
  95         struct snd_pcm_runtime *runtime;
  96         struct snd_pcm *pcm = substream->pcm;
  97         struct snd_pcm_str *pstr = substream->pstr;
  98
  99         memset(info, 0, sizeof(*info));
 100         info->card = pcm->card->number;
 101         info->device = pcm->device;
 102         info->stream = substream->stream;
 103         info->subdevice = substream->number;
 104         strlcpy(info->id, pcm->id, sizeof(info->id));
 105         strlcpy(info->name, pcm->name, sizeof(info->name));
 106         info->dev_class = pcm->dev_class;
 107         info->dev_subclass = pcm->dev_subclass;
 108         info->subdevices_count = pstr->substream_count;
 109         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 110         strlcpy(info->subname, substream->name, sizeof(info->subname));
 111         runtime = substream->runtime;
 112         /* AB: FIXME!!! This is definitely nonsense */
 113         if (runtime) {
 114                 info->sync = runtime->sync;
 115                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
 116         }
 117         return 0;
 118 }
 119
 120 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 121                       struct snd_pcm_info __user * _info)
 122 {
 123         struct snd_pcm_info *info;
 124         int err;
 125
 126         info = kmalloc(sizeof(*info), GFP_KERNEL);
 127         if (! info)
 128                 return -ENOMEM;
 129         err = snd_pcm_info(substream, info);
 130         if (err >= 0) {
 131                 if (copy_to_user(_info, info, sizeof(*info)))
 132                         err = -EFAULT;
 133         }
 134         kfree(info);
 135         return err;
 136 }
 137
 138 #undef RULES_DEBUG
 139
 140 #ifdef RULES_DEBUG
 141 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
 142 char *snd_pcm_hw_param_names[] = {
 143         HW_PARAM(ACCESS),
 144         HW_PARAM(FORMAT),
 145         HW_PARAM(SUBFORMAT),
 146         HW_PARAM(SAMPLE_BITS),
 147         HW_PARAM(FRAME_BITS),
 148         HW_PARAM(CHANNELS),
 149         HW_PARAM(RATE),
 150         HW_PARAM(PERIOD_TIME),
 151         HW_PARAM(PERIOD_SIZE),
 152         HW_PARAM(PERIOD_BYTES),
 153         HW_PARAM(PERIODS),
 154         HW_PARAM(BUFFER_TIME),
 155         HW_PARAM(BUFFER_SIZE),
 156         HW_PARAM(BUFFER_BYTES),
 157         HW_PARAM(TICK_TIME),
 158 };
 159 #endif
 160
 161 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
 162                       struct snd_pcm_hw_params *params)
 163 {
 164         unsigned int k;
 165         struct snd_pcm_hardware *hw;
 166         struct snd_interval *i = NULL;
 167         struct snd_mask *m = NULL;
 168         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
 169         unsigned int rstamps[constrs->rules_num];
 170         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 171         unsigned int stamp = 2;
 172         int changed, again;
 173
 174         params->info = 0;
 175         params->fifo_size = 0;
 176         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
 177                 params->msbits = 0;
 178         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
 179                 params->rate_num = 0;
 180                 params->rate_den = 0;
 181         }
 182
 183         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
 184                 m = hw_param_mask(params, k);
 185                 if (snd_mask_empty(m))
 186                         return -EINVAL;
 187                 if (!(params->rmask & (1 << k)))
 188                         continue;
 189 #ifdef RULES_DEBUG
 190                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 191                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 192 #endif
 193                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
 194 #ifdef RULES_DEBUG
 195                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 196 #endif
 197                 if (changed)
 198                         params->cmask |= 1 << k;
 199                 if (changed < 0)
 200                         return changed;
 201         }
 202
 203         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
 204                 i = hw_param_interval(params, k);
 205                 if (snd_interval_empty(i))
 206                         return -EINVAL;
 207                 if (!(params->rmask & (1 << k)))
 208                         continue;
 209 #ifdef RULES_DEBUG
 210                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 211                 if (i->empty)
 212                         printk("empty");
 213                 else
 214                         printk("%c%u %u%c",
 215                                i->openmin ? '(' : '[', i->min,
 216                                i->max, i->openmax ? ')' : ']');
 217                 printk(" -> ");
 218 #endif
 219                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
 220 #ifdef RULES_DEBUG
 221                 if (i->empty)
 222                         printk("empty\n");
 223                 else
 224                         printk("%c%u %u%c\n",
 225                                i->openmin ? '(' : '[', i->min,
 226                                i->max, i->openmax ? ')' : ']');
 227 #endif
 228                 if (changed)
 229                         params->cmask |= 1 << k;
 230                 if (changed < 0)
 231                         return changed;
 232         }
 233
 234         for (k = 0; k < constrs->rules_num; k++)
 235                 rstamps[k] = 0;
 236         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
 237                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
 238         do {
 239                 again = 0;
 240                 for (k = 0; k < constrs->rules_num; k++) {
 241                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
 242                         unsigned int d;
 243                         int doit = 0;
 244                         if (r->cond && !(r->cond & params->flags))
 245                                 continue;
 246                         for (d = 0; r->deps[d] >= 0; d++) {
 247                                 if (vstamps[r->deps[d]] > rstamps[k]) {
 248                                         doit = 1;
 249                                         break;
 250                                 }
 251                         }
 252                         if (!doit)
 253                                 continue;
 254 #ifdef RULES_DEBUG
 255                         printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
 256                         if (r->var >= 0) {
 257                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
 258                                 if (hw_is_mask(r->var)) {
 259                                         m = hw_param_mask(params, r->var);
 260                                         printk("%x", *m->bits);
 261                                 } else {
 262                                         i = hw_param_interval(params, r->var);
 263                                         if (i->empty)
 264                                                 printk("empty");
 265                                         else
 266                                                 printk("%c%u %u%c",
 267                                                        i->openmin ? '(' : '[', i->min,
 268                                                        i->max, i->openmax ? ')' : ']');
 269                                 }
 270                         }
 271 #endif
 272                         changed = r->func(params, r);
 273 #ifdef RULES_DEBUG
 274                         if (r->var >= 0) {
 275                                 printk(" -> ");
 276                                 if (hw_is_mask(r->var))
 277                                         printk("%x", *m->bits);
 278                                 else {
 279                                         if (i->empty)
 280                                                 printk("empty");
 281                                         else
 282                                                 printk("%c%u %u%c",
 283                                                        i->openmin ? '(' : '[', i->min,
 284                                                        i->max, i->openmax ? ')' : ']');
 285                                 }
 286                         }
 287                         printk("\n");
 288 #endif
 289                         rstamps[k] = stamp;
 290                         if (changed && r->var >= 0) {
 291                                 params->cmask |= (1 << r->var);
 292                                 vstamps[r->var] = stamp;
 293                                 again = 1;
 294                         }
 295                         if (changed < 0)
 296                                 return changed;
 297                         stamp++;
 298                 }
 299         } while (again);
 300         if (!params->msbits) {
 301                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
 302                 if (snd_interval_single(i))
 303                         params->msbits = snd_interval_value(i);
 304         }
 305
 306         if (!params->rate_den) {
 307                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 308                 if (snd_interval_single(i)) {
 309                         params->rate_num = snd_interval_value(i);
 310                         params->rate_den = 1;
 311                 }
 312         }
 313
 314         hw = &substream->runtime->hw;
 315         if (!params->info)
 316                 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
 317         if (!params->fifo_size) {
 318                 if (snd_mask_min(&params->masks[SNDRV_PCM_HW_PARAM_FORMAT]) ==
 319                     snd_mask_max(&params->masks[SNDRV_PCM_HW_PARAM_FORMAT]) &&
 320                     snd_mask_min(&params->masks[SNDRV_PCM_HW_PARAM_CHANNELS]) ==
 321                     snd_mask_max(&params->masks[SNDRV_PCM_HW_PARAM_CHANNELS])) {
 322                         changed = substream->ops->ioctl(substream,
 323                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
 324                         if (changed < 0)
 325                                 return changed;
 326                 }
 327         }
 328         params->rmask = 0;
 329         return 0;
 330 }
 331
 332 EXPORT_SYMBOL(snd_pcm_hw_refine);
 333
 334 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 335                                   struct snd_pcm_hw_params __user * _params)
 336 {
 337         struct snd_pcm_hw_params *params;
 338         int err;
 339
 340         params = memdup_user(_params, sizeof(*params));
 341         if (IS_ERR(params))
 342                 return PTR_ERR(params);
 343
 344         err = snd_pcm_hw_refine(substream, params);
 345         if (copy_to_user(_params, params, sizeof(*params))) {
 346                 if (!err)
 347                         err = -EFAULT;
 348         }
 349
 350         kfree(params);
 351         return err;
 352 }
 353
 354 static int period_to_usecs(struct snd_pcm_runtime *runtime)
 355 {
 356         int usecs;
 357
 358         if (! runtime->rate)
 359                 return -1; /* invalid */
 360
 361         /* take 75% of period time as the deadline */
 362         usecs = (750000 / runtime->rate) * runtime->period_size;
 363         usecs += ((750000 % runtime->rate) * runtime->period_size) /
 364                 runtime->rate;
 365
 366         return usecs;
 367 }
 368
 369 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 370                              struct snd_pcm_hw_params *params)
 371 {
 372         struct snd_pcm_runtime *runtime;
 373         int err, usecs;
 374         unsigned int bits;
 375         snd_pcm_uframes_t frames;
 376
 377         if (PCM_RUNTIME_CHECK(substream))
 378                 return -ENXIO;
 379         runtime = substream->runtime;
 380         snd_pcm_stream_lock_irq(substream);
 381         switch (runtime->status->state) {
 382         case SNDRV_PCM_STATE_OPEN:
 383         case SNDRV_PCM_STATE_SETUP:
 384         case SNDRV_PCM_STATE_PREPARED:
 385                 break;
 386         default:
 387                 snd_pcm_stream_unlock_irq(substream);
 388                 return -EBADFD;
 389         }
 390         snd_pcm_stream_unlock_irq(substream);
 391 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 392         if (!substream->oss.oss)
 393 #endif
 394                 if (atomic_read(&substream->mmap_count))
 395                         return -EBADFD;
 396
 397         params->rmask = ~0U;
 398         err = snd_pcm_hw_refine(substream, params);
 399         if (err < 0)
 400                 goto _error;
 401
 402         err = snd_pcm_hw_params_choose(substream, params);
 403         if (err < 0)
 404                 goto _error;
 405
 406         if (substream->ops->hw_params != NULL) {
 407                 err = substream->ops->hw_params(substream, params);
 408                 if (err < 0)
 409                         goto _error;
 410         }
 411
 412         runtime->access = params_access(params);
 413         runtime->format = params_format(params);
 414         runtime->subformat = params_subformat(params);
 415         runtime->channels = params_channels(params);
 416         runtime->rate = params_rate(params);
 417         runtime->period_size = params_period_size(params);
 418         runtime->periods = params_periods(params);
 419         runtime->buffer_size = params_buffer_size(params);
 420         runtime->info = params->info;
 421         runtime->rate_num = params->rate_num;
 422         runtime->rate_den = params->rate_den;
 423
 424         bits = snd_pcm_format_physical_width(runtime->format);
 425         runtime->sample_bits = bits;
 426         bits *= runtime->channels;
 427         runtime->frame_bits = bits;
 428         frames = 1;
 429         while (bits % 8 != 0) {
 430                 bits *= 2;
 431                 frames *= 2;
 432         }
 433         runtime->byte_align = bits / 8;
 434         runtime->min_align = frames;
 435
 436         /* Default sw params */
 437         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 438         runtime->period_step = 1;
 439         runtime->control->avail_min = runtime->period_size;
 440         runtime->start_threshold = 1;
 441         runtime->stop_threshold = runtime->buffer_size;
 442         runtime->silence_threshold = 0;
 443         runtime->silence_size = 0;
 444         runtime->boundary = runtime->buffer_size;
 445         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 446                 runtime->boundary *= 2;
 447
 448         snd_pcm_timer_resolution_change(substream);
 449         runtime->status->state = SNDRV_PCM_STATE_SETUP;
 450
 451         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
 452                                 substream->latency_id);
 453         if ((usecs = period_to_usecs(runtime)) >= 0)
 454                 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
 455                                         substream->latency_id, usecs);
 456         return 0;
 457  _error:
 458         /* hardware might be unuseable from this time,
 459            so we force application to retry to set
 460            the correct hardware parameter settings */
 461         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 462         if (substream->ops->hw_free != NULL)
 463                 substream->ops->hw_free(substream);
 464         return err;
 465 }
 466
 467 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 468                                   struct snd_pcm_hw_params __user * _params)
 469 {
 470         struct snd_pcm_hw_params *params;
 471         int err;
 472
 473         params = memdup_user(_params, sizeof(*params));
 474         if (IS_ERR(params))
 475                 return PTR_ERR(params);
 476
 477         err = snd_pcm_hw_params(substream, params);
 478         if (copy_to_user(_params, params, sizeof(*params))) {
 479                 if (!err)
 480                         err = -EFAULT;
 481         }
 482
 483         kfree(params);
 484         return err;
 485 }
 486
 487 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 488 {
 489         struct snd_pcm_runtime *runtime;
 490         int result = 0;
 491
 492         if (PCM_RUNTIME_CHECK(substream))
 493                 return -ENXIO;
 494         runtime = substream->runtime;
 495         snd_pcm_stream_lock_irq(substream);
 496         switch (runtime->status->state) {
 497         case SNDRV_PCM_STATE_SETUP:
 498         case SNDRV_PCM_STATE_PREPARED:
 499                 break;
 500         default:
 501                 snd_pcm_stream_unlock_irq(substream);
 502                 return -EBADFD;
 503         }
 504         snd_pcm_stream_unlock_irq(substream);
 505         if (atomic_read(&substream->mmap_count))
 506                 return -EBADFD;
 507         if (substream->ops->hw_free)
 508                 result = substream->ops->hw_free(substream);
 509         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 510         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
 511                 substream->latency_id);
 512         return result;
 513 }
 514
 515 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 516                              struct snd_pcm_sw_params *params)
 517 {
 518         struct snd_pcm_runtime *runtime;
 519
 520         if (PCM_RUNTIME_CHECK(substream))
 521                 return -ENXIO;
 522         runtime = substream->runtime;
 523         snd_pcm_stream_lock_irq(substream);
 524         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 525                 snd_pcm_stream_unlock_irq(substream);
 526                 return -EBADFD;
 527         }
 528         snd_pcm_stream_unlock_irq(substream);
 529
 530         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 531                 return -EINVAL;
 532         if (params->avail_min == 0)
 533                 return -EINVAL;
 534         if (params->silence_size >= runtime->boundary) {
 535                 if (params->silence_threshold != 0)
 536                         return -EINVAL;
 537         } else {
 538                 if (params->silence_size > params->silence_threshold)
 539                         return -EINVAL;
 540                 if (params->silence_threshold > runtime->buffer_size)
 541                         return -EINVAL;
 542         }
 543         snd_pcm_stream_lock_irq(substream);
 544         runtime->tstamp_mode = params->tstamp_mode;
 545         runtime->period_step = params->period_step;
 546         runtime->control->avail_min = params->avail_min;
 547         runtime->start_threshold = params->start_threshold;
 548         runtime->stop_threshold = params->stop_threshold;
 549         runtime->silence_threshold = params->silence_threshold;
 550         runtime->silence_size = params->silence_size;
 551         params->boundary = runtime->boundary;
 552         if (snd_pcm_running(substream)) {
 553                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 554                     runtime->silence_size > 0)
 555                         snd_pcm_playback_silence(substream, ULONG_MAX);
 556                 wake_up(&runtime->sleep);
 557         }
 558         snd_pcm_stream_unlock_irq(substream);
 559         return 0;
 560 }
 561
 562 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 563                                   struct snd_pcm_sw_params __user * _params)
 564 {
 565         struct snd_pcm_sw_params params;
 566         int err;
 567         if (copy_from_user(&params, _params, sizeof(params)))
 568                 return -EFAULT;
 569         err = snd_pcm_sw_params(substream, &params);
 570         if (copy_to_user(_params, &params, sizeof(params)))
 571                 return -EFAULT;
 572         return err;
 573 }
 574
 575 int snd_pcm_status(struct snd_pcm_substream *substream,
 576                    struct snd_pcm_status *status)
 577 {
 578         struct snd_pcm_runtime *runtime = substream->runtime;
 579
 580         snd_pcm_stream_lock_irq(substream);
 581         status->state = runtime->status->state;
 582         status->suspended_state = runtime->status->suspended_state;
 583         if (status->state == SNDRV_PCM_STATE_OPEN)
 584                 goto _end;
 585         status->trigger_tstamp = runtime->trigger_tstamp;
 586         if (snd_pcm_running(substream)) {
 587                 snd_pcm_update_hw_ptr(substream);
 588                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
 589                         status->tstamp = runtime->status->tstamp;
 590                         goto _tstamp_end;
 591                 }
 592         }
 593         snd_pcm_gettime(runtime, &status->tstamp);
 594  _tstamp_end:
 595         status->appl_ptr = runtime->control->appl_ptr;
 596         status->hw_ptr = runtime->status->hw_ptr;
 597         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 598                 status->avail = snd_pcm_playback_avail(runtime);
 599                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 600                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 601                         status->delay = runtime->buffer_size - status->avail;
 602                         status->delay += runtime->delay;
 603                 } else
 604                         status->delay = 0;
 605         } else {
 606                 status->avail = snd_pcm_capture_avail(runtime);
 607                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 608                         status->delay = status->avail + runtime->delay;
 609                 else
 610                         status->delay = 0;
 611         }
 612         status->avail_max = runtime->avail_max;
 613         status->overrange = runtime->overrange;
 614         runtime->avail_max = 0;
 615         runtime->overrange = 0;
 616  _end:
 617         snd_pcm_stream_unlock_irq(substream);
 618         return 0;
 619 }
 620
 621 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 622                                struct snd_pcm_status __user * _status)
 623 {
 624         struct snd_pcm_status status;
 625         int res;
 626
 627         memset(&status, 0, sizeof(status));
 628         res = snd_pcm_status(substream, &status);
 629         if (res < 0)
 630                 return res;
 631         if (copy_to_user(_status, &status, sizeof(status)))
 632                 return -EFAULT;
 633         return 0;
 634 }
 635
 636 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 637                                 struct snd_pcm_channel_info * info)
 638 {
 639         struct snd_pcm_runtime *runtime;
 640         unsigned int channel;
 641
 642         channel = info->channel;
 643         runtime = substream->runtime;
 644         snd_pcm_stream_lock_irq(substream);
 645         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 646                 snd_pcm_stream_unlock_irq(substream);
 647                 return -EBADFD;
 648         }
 649         snd_pcm_stream_unlock_irq(substream);
 650         if (channel >= runtime->channels)
 651                 return -EINVAL;
 652         memset(info, 0, sizeof(*info));
 653         info->channel = channel;
 654         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 655 }
 656
 657 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 658                                      struct snd_pcm_channel_info __user * _info)
 659 {
 660         struct snd_pcm_channel_info info;
 661         int res;
 662
 663         if (copy_from_user(&info, _info, sizeof(info)))
 664                 return -EFAULT;
 665         res = snd_pcm_channel_info(substream, &info);
 666         if (res < 0)
 667                 return res;
 668         if (copy_to_user(_info, &info, sizeof(info)))
 669                 return -EFAULT;
 670         return 0;
 671 }
 672
 673 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 674 {
 675         struct snd_pcm_runtime *runtime = substream->runtime;
 676         if (runtime->trigger_master == NULL)
 677                 return;
 678         if (runtime->trigger_master == substream) {
 679                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
 680         } else {
 681                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 682                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 683         }
 684         runtime->trigger_master = NULL;
 685 }
 686
 687 struct action_ops {
 688         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 689         int (*do_action)(struct snd_pcm_substream *substream, int state);
 690         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 691         void (*post_action)(struct snd_pcm_substream *substream, int state);
 692 };
 693
 694 /*
 695  *  this functions is core for handling of linked stream
 696  *  Note: the stream state might be changed also on failure
 697  *  Note2: call with calling stream lock + link lock
 698  */
 699 static int snd_pcm_action_group(struct action_ops *ops,
 700                                 struct snd_pcm_substream *substream,
 701                                 int state, int do_lock)
 702 {
 703         struct snd_pcm_substream *s = NULL;
 704         struct snd_pcm_substream *s1;
 705         int res = 0;
 706
 707         snd_pcm_group_for_each_entry(s, substream) {
 708                 if (do_lock && s != substream)
 709                         spin_lock_nested(&s->self_group.lock,
 710                                          SINGLE_DEPTH_NESTING);
 711                 res = ops->pre_action(s, state);
 712                 if (res < 0)
 713                         goto _unlock;
 714         }
 715         snd_pcm_group_for_each_entry(s, substream) {
 716                 res = ops->do_action(s, state);
 717                 if (res < 0) {
 718                         if (ops->undo_action) {
 719                                 snd_pcm_group_for_each_entry(s1, substream) {
 720                                         if (s1 == s) /* failed stream */
 721                                                 break;
 722                                         ops->undo_action(s1, state);
 723                                 }
 724                         }
 725                         s = NULL; /* unlock all */
 726                         goto _unlock;
 727                 }
 728         }
 729         snd_pcm_group_for_each_entry(s, substream) {
 730                 ops->post_action(s, state);
 731         }
 732  _unlock:
 733         if (do_lock) {
 734                 /* unlock streams */
 735                 snd_pcm_group_for_each_entry(s1, substream) {
 736                         if (s1 != substream)
 737                                 spin_unlock(&s1->self_group.lock);
 738                         if (s1 == s)    /* end */
 739                                 break;
 740                 }
 741         }
 742         return res;
 743 }
 744
 745 /*
 746  *  Note: call with stream lock
 747  */
 748 static int snd_pcm_action_single(struct action_ops *ops,
 749                                  struct snd_pcm_substream *substream,
 750                                  int state)
 751 {
 752         int res;
 753
 754         res = ops->pre_action(substream, state);
 755         if (res < 0)
 756                 return res;
 757         res = ops->do_action(substream, state);
 758         if (res == 0)
 759                 ops->post_action(substream, state);
 760         else if (ops->undo_action)
 761                 ops->undo_action(substream, state);
 762         return res;
 763 }
 764
 765 /*
 766  *  Note: call with stream lock
 767  */
 768 static int snd_pcm_action(struct action_ops *ops,
 769                           struct snd_pcm_substream *substream,
 770                           int state)
 771 {
 772         int res;
 773
 774         if (snd_pcm_stream_linked(substream)) {
 775                 if (!spin_trylock(&substream->group->lock)) {
 776                         spin_unlock(&substream->self_group.lock);
 777                         spin_lock(&substream->group->lock);
 778                         spin_lock(&substream->self_group.lock);
 779                 }
 780                 res = snd_pcm_action_group(ops, substream, state, 1);
 781                 spin_unlock(&substream->group->lock);
 782         } else {
 783                 res = snd_pcm_action_single(ops, substream, state);
 784         }
 785         return res;
 786 }
 787
 788 /*
 789  *  Note: don't use any locks before
 790  */
 791 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 792                                    struct snd_pcm_substream *substream,
 793                                    int state)
 794 {
 795         int res;
 796
 797         read_lock_irq(&snd_pcm_link_rwlock);
 798         if (snd_pcm_stream_linked(substream)) {
 799                 spin_lock(&substream->group->lock);
 800                 spin_lock(&substream->self_group.lock);
 801                 res = snd_pcm_action_group(ops, substream, state, 1);
 802                 spin_unlock(&substream->self_group.lock);
 803                 spin_unlock(&substream->group->lock);
 804         } else {
 805                 spin_lock(&substream->self_group.lock);
 806                 res = snd_pcm_action_single(ops, substream, state);
 807                 spin_unlock(&substream->self_group.lock);
 808         }
 809         read_unlock_irq(&snd_pcm_link_rwlock);
 810         return res;
 811 }
 812
 813 /*
 814  */
 815 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 816                                     struct snd_pcm_substream *substream,
 817                                     int state)
 818 {
 819         int res;
 820
 821         down_read(&snd_pcm_link_rwsem);
 822         if (snd_pcm_stream_linked(substream))
 823                 res = snd_pcm_action_group(ops, substream, state, 0);
 824         else
 825                 res = snd_pcm_action_single(ops, substream, state);
 826         up_read(&snd_pcm_link_rwsem);
 827         return res;
 828 }
 829
 830 /*
 831  * start callbacks
 832  */
 833 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 834 {
 835         struct snd_pcm_runtime *runtime = substream->runtime;
 836         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 837                 return -EBADFD;
 838         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 839             !snd_pcm_playback_data(substream))
 840                 return -EPIPE;
 841         runtime->trigger_master = substream;
 842         return 0;
 843 }
 844
 845 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 846 {
 847         if (substream->runtime->trigger_master != substream)
 848                 return 0;
 849         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
 850 }
 851
 852 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
 853 {
 854         if (substream->runtime->trigger_master == substream)
 855                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 856 }
 857
 858 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
 859 {
 860         struct snd_pcm_runtime *runtime = substream->runtime;
 861         snd_pcm_trigger_tstamp(substream);
 862         runtime->hw_ptr_jiffies = jiffies;
 863         runtime->status->state = state;
 864         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 865             runtime->silence_size > 0)
 866                 snd_pcm_playback_silence(substream, ULONG_MAX);
 867         if (substream->timer)
 868                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
 869                                  &runtime->trigger_tstamp);
 870 }
 871
 872 static struct action_ops snd_pcm_action_start = {
 873         .pre_action = snd_pcm_pre_start,
 874         .do_action = snd_pcm_do_start,
 875         .undo_action = snd_pcm_undo_start,
 876         .post_action = snd_pcm_post_start
 877 };
 878
 879 /**
 880  * snd_pcm_start - start all linked streams
 881  * @substream: the PCM substream instance
 882  */
 883 int snd_pcm_start(struct snd_pcm_substream *substream)
 884 {
 885         return snd_pcm_action(&snd_pcm_action_start, substream,
 886                               SNDRV_PCM_STATE_RUNNING);
 887 }
 888
 889 /*
 890  * stop callbacks
 891  */
 892 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
 893 {
 894         struct snd_pcm_runtime *runtime = substream->runtime;
 895         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 896                 return -EBADFD;
 897         runtime->trigger_master = substream;
 898         return 0;
 899 }
 900
 901 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
 902 {
 903         if (substream->runtime->trigger_master == substream &&
 904             snd_pcm_running(substream))
 905                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 906         return 0; /* unconditonally stop all substreams */
 907 }
 908
 909 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
 910 {
 911         struct snd_pcm_runtime *runtime = substream->runtime;
 912         if (runtime->status->state != state) {
 913                 snd_pcm_trigger_tstamp(substream);
 914                 if (substream->timer)
 915                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
 916                                          &runtime->trigger_tstamp);
 917                 runtime->status->state = state;
 918         }
 919         wake_up(&runtime->sleep);
 920 }
 921
 922 static struct action_ops snd_pcm_action_stop = {
 923         .pre_action = snd_pcm_pre_stop,
 924         .do_action = snd_pcm_do_stop,
 925         .post_action = snd_pcm_post_stop
 926 };
 927
 928 /**
 929  * snd_pcm_stop - try to stop all running streams in the substream group
 930  * @substream: the PCM substream instance
 931  * @state: PCM state after stopping the stream
 932  *
 933  * The state of each stream is then changed to the given state unconditionally.
 934  */
 935 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
 936 {
 937         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
 938 }
 939
 940 EXPORT_SYMBOL(snd_pcm_stop);
 941
 942 /**
 943  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
 944  * @substream: the PCM substream
 945  *
 946  * After stopping, the state is changed to SETUP.
 947  * Unlike snd_pcm_stop(), this affects only the given stream.
 948  */
 949 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
 950 {
 951         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
 952                                      SNDRV_PCM_STATE_SETUP);
 953 }
 954
 955 /*
 956  * pause callbacks
 957  */
 958 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
 959 {
 960         struct snd_pcm_runtime *runtime = substream->runtime;
 961         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
 962                 return -ENOSYS;
 963         if (push) {
 964                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
 965                         return -EBADFD;
 966         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
 967                 return -EBADFD;
 968         runtime->trigger_master = substream;
 969         return 0;
 970 }
 971
 972 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
 973 {
 974         if (substream->runtime->trigger_master != substream)
 975                 return 0;
 976         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
 977          * a delta betwen the current jiffies, this gives a large enough
 978          * delta, effectively to skip the check once.
 979          */
 980         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
 981         return substream->ops->trigger(substream,
 982                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
 983                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
 984 }
 985
 986 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
 987 {
 988         if (substream->runtime->trigger_master == substream)
 989                 substream->ops->trigger(substream,
 990                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
 991                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
 992 }
 993
 994 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
 995 {
 996         struct snd_pcm_runtime *runtime = substream->runtime;
 997         snd_pcm_trigger_tstamp(substream);
 998         if (push) {
 999                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1000                 if (substream->timer)
1001                         snd_timer_notify(substream->timer,
1002                                          SNDRV_TIMER_EVENT_MPAUSE,
1003                                          &runtime->trigger_tstamp);
1004                 wake_up(&runtime->sleep);
1005         } else {
1006                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1007                 if (substream->timer)
1008                         snd_timer_notify(substream->timer,
1009                                          SNDRV_TIMER_EVENT_MCONTINUE,
1010                                          &runtime->trigger_tstamp);
1011         }
1012 }
1013
1014 static struct action_ops snd_pcm_action_pause = {
1015         .pre_action = snd_pcm_pre_pause,
1016         .do_action = snd_pcm_do_pause,
1017         .undo_action = snd_pcm_undo_pause,
1018         .post_action = snd_pcm_post_pause
1019 };
1020
1021 /*
1022  * Push/release the pause for all linked streams.
1023  */
1024 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1025 {
1026         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1027 }
1028
1029 #ifdef CONFIG_PM
1030 /* suspend */
1031
1032 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1033 {
1034         struct snd_pcm_runtime *runtime = substream->runtime;
1035         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1036                 return -EBUSY;
1037         runtime->trigger_master = substream;
1038         return 0;
1039 }
1040
1041 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1042 {
1043         struct snd_pcm_runtime *runtime = substream->runtime;
1044         if (runtime->trigger_master != substream)
1045                 return 0;
1046         if (! snd_pcm_running(substream))
1047                 return 0;
1048         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1049         return 0; /* suspend unconditionally */
1050 }
1051
1052 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1053 {
1054         struct snd_pcm_runtime *runtime = substream->runtime;
1055         snd_pcm_trigger_tstamp(substream);
1056         if (substream->timer)
1057                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1058                                  &runtime->trigger_tstamp);
1059         runtime->status->suspended_state = runtime->status->state;
1060         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1061         wake_up(&runtime->sleep);
1062 }
1063
1064 static struct action_ops snd_pcm_action_suspend = {
1065         .pre_action = snd_pcm_pre_suspend,
1066         .do_action = snd_pcm_do_suspend,
1067         .post_action = snd_pcm_post_suspend
1068 };
1069
1070 /**
1071  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1072  * @substream: the PCM substream
1073  *
1074  * After this call, all streams are changed to SUSPENDED state.
1075  */
1076 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1077 {
1078         int err;
1079         unsigned long flags;
1080
1081         if (! substream)
1082                 return 0;
1083
1084         snd_pcm_stream_lock_irqsave(substream, flags);
1085         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1086         snd_pcm_stream_unlock_irqrestore(substream, flags);
1087         return err;
1088 }
1089
1090 EXPORT_SYMBOL(snd_pcm_suspend);
1091
1092 /**
1093  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1094  * @pcm: the PCM instance
1095  *
1096  * After this call, all streams are changed to SUSPENDED state.
1097  */
1098 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1099 {
1100         struct snd_pcm_substream *substream;
1101         int stream, err = 0;
1102
1103         if (! pcm)
1104                 return 0;
1105
1106         for (stream = 0; stream < 2; stream++) {
1107                 for (substream = pcm->streams[stream].substream;
1108                      substream; substream = substream->next) {
1109                         /* FIXME: the open/close code should lock this as well */
1110                         if (substream->runtime == NULL)
1111                                 continue;
1112                         err = snd_pcm_suspend(substream);
1113                         if (err < 0 && err != -EBUSY)
1114                                 return err;
1115                 }
1116         }
1117         return 0;
1118 }
1119
1120 EXPORT_SYMBOL(snd_pcm_suspend_all);
1121
1122 /* resume */
1123
1124 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1125 {
1126         struct snd_pcm_runtime *runtime = substream->runtime;
1127         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1128                 return -ENOSYS;
1129         runtime->trigger_master = substream;
1130         return 0;
1131 }
1132
1133 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1134 {
1135         struct snd_pcm_runtime *runtime = substream->runtime;
1136         if (runtime->trigger_master != substream)
1137                 return 0;
1138         /* DMA not running previously? */
1139         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1140             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1141              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1142                 return 0;
1143         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1144 }
1145
1146 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1147 {
1148         if (substream->runtime->trigger_master == substream &&
1149             snd_pcm_running(substream))
1150                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1151 }
1152
1153 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1154 {
1155         struct snd_pcm_runtime *runtime = substream->runtime;
1156         snd_pcm_trigger_tstamp(substream);
1157         if (substream->timer)
1158                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1159                                  &runtime->trigger_tstamp);
1160         runtime->status->state = runtime->status->suspended_state;
1161 }
1162
1163 static struct action_ops snd_pcm_action_resume = {
1164         .pre_action = snd_pcm_pre_resume,
1165         .do_action = snd_pcm_do_resume,
1166         .undo_action = snd_pcm_undo_resume,
1167         .post_action = snd_pcm_post_resume
1168 };
1169
1170 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1171 {
1172         struct snd_card *card = substream->pcm->card;
1173         int res;
1174
1175         snd_power_lock(card);
1176         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1177                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1178         snd_power_unlock(card);
1179         return res;
1180 }
1181
1182 #else
1183
1184 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1185 {
1186         return -ENOSYS;
1187 }
1188
1189 #endif /* CONFIG_PM */
1190
1191 /*
1192  * xrun ioctl
1193  *
1194  * Change the RUNNING stream(s) to XRUN state.
1195  */
1196 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1197 {
1198         struct snd_card *card = substream->pcm->card;
1199         struct snd_pcm_runtime *runtime = substream->runtime;
1200         int result;
1201
1202         snd_power_lock(card);
1203         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1204                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1205                 if (result < 0)
1206                         goto _unlock;
1207         }
1208
1209         snd_pcm_stream_lock_irq(substream);
1210         switch (runtime->status->state) {
1211         case SNDRV_PCM_STATE_XRUN:
1212                 result = 0;     /* already there */
1213                 break;
1214         case SNDRV_PCM_STATE_RUNNING:
1215                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1216                 break;
1217         default:
1218                 result = -EBADFD;
1219         }
1220         snd_pcm_stream_unlock_irq(substream);
1221  _unlock:
1222         snd_power_unlock(card);
1223         return result;
1224 }
1225
1226 /*
1227  * reset ioctl
1228  */
1229 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1230 {
1231         struct snd_pcm_runtime *runtime = substream->runtime;
1232         switch (runtime->status->state) {
1233         case SNDRV_PCM_STATE_RUNNING:
1234         case SNDRV_PCM_STATE_PREPARED:
1235         case SNDRV_PCM_STATE_PAUSED:
1236         case SNDRV_PCM_STATE_SUSPENDED:
1237                 return 0;
1238         default:
1239                 return -EBADFD;
1240         }
1241 }
1242
1243 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1244 {
1245         struct snd_pcm_runtime *runtime = substream->runtime;
1246         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1247         if (err < 0)
1248                 return err;
1249         runtime->hw_ptr_base = 0;
1250         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1251                 runtime->status->hw_ptr % runtime->period_size;
1252         runtime->silence_start = runtime->status->hw_ptr;
1253         runtime->silence_filled = 0;
1254         return 0;
1255 }
1256
1257 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1258 {
1259         struct snd_pcm_runtime *runtime = substream->runtime;
1260         runtime->control->appl_ptr = runtime->status->hw_ptr;
1261         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1262             runtime->silence_size > 0)
1263                 snd_pcm_playback_silence(substream, ULONG_MAX);
1264 }
1265
1266 static struct action_ops snd_pcm_action_reset = {
1267         .pre_action = snd_pcm_pre_reset,
1268         .do_action = snd_pcm_do_reset,
1269         .post_action = snd_pcm_post_reset
1270 };
1271
1272 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1273 {
1274         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1275 }
1276
1277 /*
1278  * prepare ioctl
1279  */
1280 /* we use the second argument for updating f_flags */
1281 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1282                                int f_flags)
1283 {
1284         struct snd_pcm_runtime *runtime = substream->runtime;
1285         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1286             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1287                 return -EBADFD;
1288         if (snd_pcm_running(substream))
1289                 return -EBUSY;
1290         substream->f_flags = f_flags;
1291         return 0;
1292 }
1293
1294 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1295 {
1296         int err;
1297         err = substream->ops->prepare(substream);
1298         if (err < 0)
1299                 return err;
1300         return snd_pcm_do_reset(substream, 0);
1301 }
1302
1303 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1304 {
1305         struct snd_pcm_runtime *runtime = substream->runtime;
1306         runtime->control->appl_ptr = runtime->status->hw_ptr;
1307         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1308 }
1309
1310 static struct action_ops snd_pcm_action_prepare = {
1311         .pre_action = snd_pcm_pre_prepare,
1312         .do_action = snd_pcm_do_prepare,
1313         .post_action = snd_pcm_post_prepare
1314 };
1315
1316 /**
1317  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1318  * @substream: the PCM substream instance
1319  * @file: file to refer f_flags
1320  */
1321 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1322                            struct file *file)
1323 {
1324         int res;
1325         struct snd_card *card = substream->pcm->card;
1326         int f_flags;
1327
1328         if (file)
1329                 f_flags = file->f_flags;
1330         else
1331                 f_flags = substream->f_flags;
1332
1333         snd_power_lock(card);
1334         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1335                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1336                                                substream, f_flags);
1337         snd_power_unlock(card);
1338         return res;
1339 }
1340
1341 /*
1342  * drain ioctl
1343  */
1344
1345 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1346 {
1347         substream->runtime->trigger_master = substream;
1348         return 0;
1349 }
1350
1351 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1352 {
1353         struct snd_pcm_runtime *runtime = substream->runtime;
1354         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1355                 switch (runtime->status->state) {
1356                 case SNDRV_PCM_STATE_PREPARED:
1357                         /* start playback stream if possible */
1358                         if (! snd_pcm_playback_empty(substream)) {
1359                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1360                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1361                         }
1362                         break;
1363                 case SNDRV_PCM_STATE_RUNNING:
1364                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1365                         break;
1366                 default:
1367                         break;
1368                 }
1369         } else {
1370                 /* stop running stream */
1371                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1372                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1373                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1374                         snd_pcm_do_stop(substream, new_state);
1375                         snd_pcm_post_stop(substream, new_state);
1376                 }
1377         }
1378         return 0;
1379 }
1380
1381 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1382 {
1383 }
1384
1385 static struct action_ops snd_pcm_action_drain_init = {
1386         .pre_action = snd_pcm_pre_drain_init,
1387         .do_action = snd_pcm_do_drain_init,
1388         .post_action = snd_pcm_post_drain_init
1389 };
1390
1391 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1392
1393 /*
1394  * Drain the stream(s).
1395  * When the substream is linked, sync until the draining of all playback streams
1396  * is finished.
1397  * After this call, all streams are supposed to be either SETUP or DRAINING
1398  * (capture only) state.
1399  */
1400 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1401                          struct file *file)
1402 {
1403         struct snd_card *card;
1404         struct snd_pcm_runtime *runtime;
1405         struct snd_pcm_substream *s;
1406         wait_queue_t wait;
1407         int result = 0;
1408         int nonblock = 0;
1409
1410         card = substream->pcm->card;
1411         runtime = substream->runtime;
1412
1413         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1414                 return -EBADFD;
1415
1416         snd_power_lock(card);
1417         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1418                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1419                 if (result < 0) {
1420                         snd_power_unlock(card);
1421                         return result;
1422                 }
1423         }
1424
1425         if (file) {
1426                 if (file->f_flags & O_NONBLOCK)
1427                         nonblock = 1;
1428         } else if (substream->f_flags & O_NONBLOCK)
1429                 nonblock = 1;
1430
1431         down_read(&snd_pcm_link_rwsem);
1432         snd_pcm_stream_lock_irq(substream);
1433         /* resume pause */
1434         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1435                 snd_pcm_pause(substream, 0);
1436
1437         /* pre-start/stop - all running streams are changed to DRAINING state */
1438         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1439         if (result < 0)
1440                 goto unlock;
1441         /* in non-blocking, we don't wait in ioctl but let caller poll */
1442         if (nonblock) {
1443                 result = -EAGAIN;
1444                 goto unlock;
1445         }
1446
1447         for (;;) {
1448                 long tout;
1449                 struct snd_pcm_runtime *to_check;
1450                 if (signal_pending(current)) {
1451                         result = -ERESTARTSYS;
1452                         break;
1453                 }
1454                 /* find a substream to drain */
1455                 to_check = NULL;
1456                 snd_pcm_group_for_each_entry(s, substream) {
1457                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1458                                 continue;
1459                         runtime = s->runtime;
1460                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1461                                 to_check = runtime;
1462                                 break;
1463                         }
1464                 }
1465                 if (!to_check)
1466                         break; /* all drained */
1467                 init_waitqueue_entry(&wait, current);
1468                 add_wait_queue(&to_check->sleep, &wait);
1469                 set_current_state(TASK_INTERRUPTIBLE);
1470                 snd_pcm_stream_unlock_irq(substream);
1471                 up_read(&snd_pcm_link_rwsem);
1472                 snd_power_unlock(card);
1473                 tout = schedule_timeout(10 * HZ);
1474                 snd_power_lock(card);
1475                 down_read(&snd_pcm_link_rwsem);
1476                 snd_pcm_stream_lock_irq(substream);
1477                 remove_wait_queue(&to_check->sleep, &wait);
1478                 if (tout == 0) {
1479                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1480                                 result = -ESTRPIPE;
1481                         else {
1482                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1483                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1484                                 result = -EIO;
1485                         }
1486                         break;
1487                 }
1488         }
1489
1490  unlock:
1491         snd_pcm_stream_unlock_irq(substream);
1492         up_read(&snd_pcm_link_rwsem);
1493         snd_power_unlock(card);
1494
1495         return result;
1496 }
1497
1498 /*
1499  * drop ioctl
1500  *
1501  * Immediately put all linked substreams into SETUP state.
1502  */
1503 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1504 {
1505         struct snd_pcm_runtime *runtime;
1506         struct snd_card *card;
1507         int result = 0;
1508
1509         if (PCM_RUNTIME_CHECK(substream))
1510                 return -ENXIO;
1511         runtime = substream->runtime;
1512         card = substream->pcm->card;
1513
1514         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1515             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1516             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1517                 return -EBADFD;
1518
1519         snd_pcm_stream_lock_irq(substream);
1520         /* resume pause */
1521         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1522                 snd_pcm_pause(substream, 0);
1523
1524         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1525         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1526         snd_pcm_stream_unlock_irq(substream);
1527
1528         return result;
1529 }
1530
1531
1532 /* WARNING: Don't forget to fput back the file */
1533 static struct file *snd_pcm_file_fd(int fd)
1534 {
1535         struct file *file;
1536         struct inode *inode;
1537         unsigned int minor;
1538
1539         file = fget(fd);
1540         if (!file)
1541                 return NULL;
1542         inode = file->f_path.dentry->d_inode;
1543         if (!S_ISCHR(inode->i_mode) ||
1544             imajor(inode) != snd_major) {
1545                 fput(file);
1546                 return NULL;
1547         }
1548         minor = iminor(inode);
1549         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1550             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1551                 fput(file);
1552                 return NULL;
1553         }
1554         return file;
1555 }
1556
1557 /*
1558  * PCM link handling
1559  */
1560 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1561 {
1562         int res = 0;
1563         struct file *file;
1564         struct snd_pcm_file *pcm_file;
1565         struct snd_pcm_substream *substream1;
1566
1567         file = snd_pcm_file_fd(fd);
1568         if (!file)
1569                 return -EBADFD;
1570         pcm_file = file->private_data;
1571         substream1 = pcm_file->substream;
1572         down_write(&snd_pcm_link_rwsem);
1573         write_lock_irq(&snd_pcm_link_rwlock);
1574         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1575             substream->runtime->status->state != substream1->runtime->status->state) {
1576                 res = -EBADFD;
1577                 goto _end;
1578         }
1579         if (snd_pcm_stream_linked(substream1)) {
1580                 res = -EALREADY;
1581                 goto _end;
1582         }
1583         if (!snd_pcm_stream_linked(substream)) {
1584                 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1585                 if (substream->group == NULL) {
1586                         res = -ENOMEM;
1587                         goto _end;
1588                 }
1589                 spin_lock_init(&substream->group->lock);
1590                 INIT_LIST_HEAD(&substream->group->substreams);
1591                 list_add_tail(&substream->link_list, &substream->group->substreams);
1592                 substream->group->count = 1;
1593         }
1594         list_add_tail(&substream1->link_list, &substream->group->substreams);
1595         substream->group->count++;
1596         substream1->group = substream->group;
1597  _end:
1598         write_unlock_irq(&snd_pcm_link_rwlock);
1599         up_write(&snd_pcm_link_rwsem);
1600         fput(file);
1601         return res;
1602 }
1603
1604 static void relink_to_local(struct snd_pcm_substream *substream)
1605 {
1606         substream->group = &substream->self_group;
1607         INIT_LIST_HEAD(&substream->self_group.substreams);
1608         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1609 }
1610
1611 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1612 {
1613         struct snd_pcm_substream *s;
1614         int res = 0;
1615
1616         down_write(&snd_pcm_link_rwsem);
1617         write_lock_irq(&snd_pcm_link_rwlock);
1618         if (!snd_pcm_stream_linked(substream)) {
1619                 res = -EALREADY;
1620                 goto _end;
1621         }
1622         list_del(&substream->link_list);
1623         substream->group->count--;
1624         if (substream->group->count == 1) {     /* detach the last stream, too */
1625                 snd_pcm_group_for_each_entry(s, substream) {
1626                         relink_to_local(s);
1627                         break;
1628                 }
1629                 kfree(substream->group);
1630         }
1631         relink_to_local(substream);
1632        _end:
1633         write_unlock_irq(&snd_pcm_link_rwlock);
1634         up_write(&snd_pcm_link_rwsem);
1635         return res;
1636 }
1637
1638 /*
1639  * hw configurator
1640  */
1641 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1642                                struct snd_pcm_hw_rule *rule)
1643 {
1644         struct snd_interval t;
1645         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1646                      hw_param_interval_c(params, rule->deps[1]), &t);
1647         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1648 }
1649
1650 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1651                                struct snd_pcm_hw_rule *rule)
1652 {
1653         struct snd_interval t;
1654         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1655                      hw_param_interval_c(params, rule->deps[1]), &t);
1656         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1657 }
1658
1659 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1660                                    struct snd_pcm_hw_rule *rule)
1661 {
1662         struct snd_interval t;
1663         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1664                          hw_param_interval_c(params, rule->deps[1]),
1665                          (unsigned long) rule->private, &t);
1666         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1667 }
1668
1669 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1670                                    struct snd_pcm_hw_rule *rule)
1671 {
1672         struct snd_interval t;
1673         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1674                          (unsigned long) rule->private,
1675                          hw_param_interval_c(params, rule->deps[1]), &t);
1676         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1677 }
1678
1679 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1680                                   struct snd_pcm_hw_rule *rule)
1681 {
1682         unsigned int k;
1683         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1684         struct snd_mask m;
1685         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1686         snd_mask_any(&m);
1687         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1688                 int bits;
1689                 if (! snd_mask_test(mask, k))
1690                         continue;
1691                 bits = snd_pcm_format_physical_width(k);
1692                 if (bits <= 0)
1693                         continue; /* ignore invalid formats */
1694                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1695                         snd_mask_reset(&m, k);
1696         }
1697         return snd_mask_refine(mask, &m);
1698 }
1699
1700 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1701                                        struct snd_pcm_hw_rule *rule)
1702 {
1703         struct snd_interval t;
1704         unsigned int k;
1705         t.min = UINT_MAX;
1706         t.max = 0;
1707         t.openmin = 0;
1708         t.openmax = 0;
1709         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1710                 int bits;
1711                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1712                         continue;
1713                 bits = snd_pcm_format_physical_width(k);
1714                 if (bits <= 0)
1715                         continue; /* ignore invalid formats */
1716                 if (t.min > (unsigned)bits)
1717                         t.min = bits;
1718                 if (t.max < (unsigned)bits)
1719                         t.max = bits;
1720         }
1721         t.integer = 1;
1722         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1723 }
1724
1725 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1726 #error "Change this table"
1727 #endif
1728
1729 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1730                                  48000, 64000, 88200, 96000, 176400, 192000 };
1731
1732 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1733         .count = ARRAY_SIZE(rates),
1734         .list = rates,
1735 };
1736
1737 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1738                                 struct snd_pcm_hw_rule *rule)
1739 {
1740         struct snd_pcm_hardware *hw = rule->private;
1741         return snd_interval_list(hw_param_interval(params, rule->var),
1742                                  snd_pcm_known_rates.count,
1743                                  snd_pcm_known_rates.list, hw->rates);
1744 }
1745
1746 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1747                                             struct snd_pcm_hw_rule *rule)
1748 {
1749         struct snd_interval t;
1750         struct snd_pcm_substream *substream = rule->private;
1751         t.min = 0;
1752         t.max = substream->buffer_bytes_max;
1753         t.openmin = 0;
1754         t.openmax = 0;
1755         t.integer = 1;
1756         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1757 }
1758
1759 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1760 {
1761         struct snd_pcm_runtime *runtime = substream->runtime;
1762         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1763         int k, err;
1764
1765         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1766                 snd_mask_any(constrs_mask(constrs, k));
1767         }
1768
1769         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1770                 snd_interval_any(constrs_interval(constrs, k));
1771         }
1772
1773         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1774         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1775         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1776         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1777         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1778
1779         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1780                                    snd_pcm_hw_rule_format, NULL,
1781                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1782         if (err < 0)
1783                 return err;
1784         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1785                                   snd_pcm_hw_rule_sample_bits, NULL,
1786                                   SNDRV_PCM_HW_PARAM_FORMAT,
1787                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1788         if (err < 0)
1789                 return err;
1790         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1791                                   snd_pcm_hw_rule_div, NULL,
1792                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1793         if (err < 0)
1794                 return err;
1795         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1796                                   snd_pcm_hw_rule_mul, NULL,
1797                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1798         if (err < 0)
1799                 return err;
1800         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1801                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1802                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1803         if (err < 0)
1804                 return err;
1805         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1806                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1807                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1808         if (err < 0)
1809                 return err;
1810         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1811                                   snd_pcm_hw_rule_div, NULL,
1812                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1813         if (err < 0)
1814                 return err;
1815         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1816                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1817                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1818         if (err < 0)
1819                 return err;
1820         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1821                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1822                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1823         if (err < 0)
1824                 return err;
1825         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1826                                   snd_pcm_hw_rule_div, NULL,
1827                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1828         if (err < 0)
1829                 return err;
1830         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1831                                   snd_pcm_hw_rule_div, NULL,
1832                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1833         if (err < 0)
1834                 return err;
1835         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1836                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1837                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1838         if (err < 0)
1839                 return err;
1840         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1841                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1842                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1843         if (err < 0)
1844                 return err;
1845         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1846                                   snd_pcm_hw_rule_mul, NULL,
1847                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1848         if (err < 0)
1849                 return err;
1850         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1851                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1852                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1853         if (err < 0)
1854                 return err;
1855         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1856                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1857                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1858         if (err < 0)
1859                 return err;
1860         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1861                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1862                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1863         if (err < 0)
1864                 return err;
1865         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1866                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1867                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1868         if (err < 0)
1869                 return err;
1870         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1871                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1872                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1873         if (err < 0)
1874                 return err;
1875         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1876                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1877                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1878         if (err < 0)
1879                 return err;
1880         return 0;
1881 }
1882
1883 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1884 {
1885         struct snd_pcm_runtime *runtime = substream->runtime;
1886         struct snd_pcm_hardware *hw = &runtime->hw;
1887         int err;
1888         unsigned int mask = 0;
1889
1890         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1891                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1892         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1893                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1894         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1895                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1896                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1897                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1898                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1899                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1900                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1901         }
1902         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1903         if (err < 0)
1904                 return err;
1905
1906         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1907         if (err < 0)
1908                 return err;
1909
1910         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1911         if (err < 0)
1912                 return err;
1913
1914         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1915                                            hw->channels_min, hw->channels_max);
1916         if (err < 0)
1917                 return err;
1918
1919         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1920                                            hw->rate_min, hw->rate_max);
1921         if (err < 0)
1922                 return err;
1923
1924         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1925                                            hw->period_bytes_min, hw->period_bytes_max);
1926         if (err < 0)
1927                 return err;
1928
1929         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1930                                            hw->periods_min, hw->periods_max);
1931         if (err < 0)
1932                 return err;
1933
1934         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1935                                            hw->period_bytes_min, hw->buffer_bytes_max);
1936         if (err < 0)
1937                 return err;
1938
1939         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1940                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1941                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1942         if (err < 0)
1943                 return err;
1944
1945         /* FIXME: remove */
1946         if (runtime->dma_bytes) {
1947                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1948                 if (err < 0)
1949                         return -EINVAL;
1950         }
1951
1952         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1953                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1954                                           snd_pcm_hw_rule_rate, hw,
1955                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1956                 if (err < 0)
1957                         return err;
1958         }
1959
1960         /* FIXME: this belong to lowlevel */
1961         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1962
1963         return 0;
1964 }
1965
1966 static void pcm_release_private(struct snd_pcm_substream *substream)
1967 {
1968         snd_pcm_unlink(substream);
1969 }
1970
1971 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1972 {
1973         substream->ref_count--;
1974         if (substream->ref_count > 0)
1975                 return;
1976
1977         snd_pcm_drop(substream);
1978         if (substream->hw_opened) {
1979                 if (substream->ops->hw_free != NULL)
1980                         substream->ops->hw_free(substream);
1981                 substream->ops->close(substream);
1982                 substream->hw_opened = 0;
1983         }
1984         if (substream->pcm_release) {
1985                 substream->pcm_release(substream);
1986                 substream->pcm_release = NULL;
1987         }
1988         snd_pcm_detach_substream(substream);
1989 }
1990
1991 EXPORT_SYMBOL(snd_pcm_release_substream);
1992
1993 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
1994                            struct file *file,
1995                            struct snd_pcm_substream **rsubstream)
1996 {
1997         struct snd_pcm_substream *substream;
1998         int err;
1999
2000         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2001         if (err < 0)
2002                 return err;
2003         if (substream->ref_count > 1) {
2004                 *rsubstream = substream;
2005                 return 0;
2006         }
2007
2008         err = snd_pcm_hw_constraints_init(substream);
2009         if (err < 0) {
2010                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2011                 goto error;
2012         }
2013
2014         if ((err = substream->ops->open(substream)) < 0)
2015                 goto error;
2016
2017         substream->hw_opened = 1;
2018
2019         err = snd_pcm_hw_constraints_complete(substream);
2020         if (err < 0) {
2021                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2022                 goto error;
2023         }
2024
2025         *rsubstream = substream;
2026         return 0;
2027
2028  error:
2029         snd_pcm_release_substream(substream);
2030         return err;
2031 }
2032
2033 EXPORT_SYMBOL(snd_pcm_open_substream);
2034
2035 static int snd_pcm_open_file(struct file *file,
2036                              struct snd_pcm *pcm,
2037                              int stream,
2038                              struct snd_pcm_file **rpcm_file)
2039 {
2040         struct snd_pcm_file *pcm_file;
2041         struct snd_pcm_substream *substream;
2042         struct snd_pcm_str *str;
2043         int err;
2044
2045         if (rpcm_file)
2046                 *rpcm_file = NULL;
2047
2048         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2049         if (err < 0)
2050                 return err;
2051
2052         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2053         if (pcm_file == NULL) {
2054                 snd_pcm_release_substream(substream);
2055                 return -ENOMEM;
2056         }
2057         pcm_file->substream = substream;
2058         if (substream->ref_count == 1) {
2059                 str = substream->pstr;
2060                 substream->file = pcm_file;
2061                 substream->pcm_release = pcm_release_private;
2062         }
2063         file->private_data = pcm_file;
2064         if (rpcm_file)
2065                 *rpcm_file = pcm_file;
2066         return 0;
2067 }
2068
2069 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2070 {
2071         struct snd_pcm *pcm;
2072
2073         pcm = snd_lookup_minor_data(iminor(inode),
2074                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2075         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2076 }
2077
2078 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2079 {
2080         struct snd_pcm *pcm;
2081
2082         pcm = snd_lookup_minor_data(iminor(inode),
2083                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2084         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2085 }
2086
2087 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2088 {
2089         int err;
2090         struct snd_pcm_file *pcm_file;
2091         wait_queue_t wait;
2092
2093         if (pcm == NULL) {
2094                 err = -ENODEV;
2095                 goto __error1;
2096         }
2097         err = snd_card_file_add(pcm->card, file);
2098         if (err < 0)
2099                 goto __error1;
2100         if (!try_module_get(pcm->card->module)) {
2101                 err = -EFAULT;
2102                 goto __error2;
2103         }
2104         init_waitqueue_entry(&wait, current);
2105         add_wait_queue(&pcm->open_wait, &wait);
2106         mutex_lock(&pcm->open_mutex);
2107         while (1) {
2108                 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2109                 if (err >= 0)
2110                         break;
2111                 if (err == -EAGAIN) {
2112                         if (file->f_flags & O_NONBLOCK) {
2113                                 err = -EBUSY;
2114                                 break;
2115                         }
2116                 } else
2117                         break;
2118                 set_current_state(TASK_INTERRUPTIBLE);
2119                 mutex_unlock(&pcm->open_mutex);
2120                 schedule();
2121                 mutex_lock(&pcm->open_mutex);
2122                 if (signal_pending(current)) {
2123                         err = -ERESTARTSYS;
2124                         break;
2125                 }
2126         }
2127         remove_wait_queue(&pcm->open_wait, &wait);
2128         mutex_unlock(&pcm->open_mutex);
2129         if (err < 0)
2130                 goto __error;
2131         return err;
2132
2133       __error:
2134         module_put(pcm->card->module);
2135       __error2:
2136         snd_card_file_remove(pcm->card, file);
2137       __error1:
2138         return err;
2139 }
2140
2141 static int snd_pcm_release(struct inode *inode, struct file *file)
2142 {
2143         struct snd_pcm *pcm;
2144         struct snd_pcm_substream *substream;
2145         struct snd_pcm_file *pcm_file;
2146
2147         pcm_file = file->private_data;
2148         substream = pcm_file->substream;
2149         if (snd_BUG_ON(!substream))
2150                 return -ENXIO;
2151         pcm = substream->pcm;
2152         mutex_lock(&pcm->open_mutex);
2153         snd_pcm_release_substream(substream);
2154         kfree(pcm_file);
2155         mutex_unlock(&pcm->open_mutex);
2156         wake_up(&pcm->open_wait);
2157         module_put(pcm->card->module);
2158         snd_card_file_remove(pcm->card, file);
2159         return 0;
2160 }
2161
2162 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2163                                                  snd_pcm_uframes_t frames)
2164 {
2165         struct snd_pcm_runtime *runtime = substream->runtime;
2166         snd_pcm_sframes_t appl_ptr;
2167         snd_pcm_sframes_t ret;
2168         snd_pcm_sframes_t hw_avail;
2169
2170         if (frames == 0)
2171                 return 0;
2172
2173         snd_pcm_stream_lock_irq(substream);
2174         switch (runtime->status->state) {
2175         case SNDRV_PCM_STATE_PREPARED:
2176                 break;
2177         case SNDRV_PCM_STATE_DRAINING:
2178         case SNDRV_PCM_STATE_RUNNING:
2179                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2180                         break;
2181                 /* Fall through */
2182         case SNDRV_PCM_STATE_XRUN:
2183                 ret = -EPIPE;
2184                 goto __end;
2185         case SNDRV_PCM_STATE_SUSPENDED:
2186                 ret = -ESTRPIPE;
2187                 goto __end;
2188         default:
2189                 ret = -EBADFD;
2190                 goto __end;
2191         }
2192
2193         hw_avail = snd_pcm_playback_hw_avail(runtime);
2194         if (hw_avail <= 0) {
2195                 ret = 0;
2196                 goto __end;
2197         }
2198         if (frames > (snd_pcm_uframes_t)hw_avail)
2199                 frames = hw_avail;
2200         appl_ptr = runtime->control->appl_ptr - frames;
2201         if (appl_ptr < 0)
2202                 appl_ptr += runtime->boundary;
2203         runtime->control->appl_ptr = appl_ptr;
2204         ret = frames;
2205  __end:
2206         snd_pcm_stream_unlock_irq(substream);
2207         return ret;
2208 }
2209
2210 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2211                                                 snd_pcm_uframes_t frames)
2212 {
2213         struct snd_pcm_runtime *runtime = substream->runtime;
2214         snd_pcm_sframes_t appl_ptr;
2215         snd_pcm_sframes_t ret;
2216         snd_pcm_sframes_t hw_avail;
2217
2218         if (frames == 0)
2219                 return 0;
2220
2221         snd_pcm_stream_lock_irq(substream);
2222         switch (runtime->status->state) {
2223         case SNDRV_PCM_STATE_PREPARED:
2224         case SNDRV_PCM_STATE_DRAINING:
2225                 break;
2226         case SNDRV_PCM_STATE_RUNNING:
2227                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2228                         break;
2229                 /* Fall through */
2230         case SNDRV_PCM_STATE_XRUN:
2231                 ret = -EPIPE;
2232                 goto __end;
2233         case SNDRV_PCM_STATE_SUSPENDED:
2234                 ret = -ESTRPIPE;
2235                 goto __end;
2236         default:
2237                 ret = -EBADFD;
2238                 goto __end;
2239         }
2240
2241         hw_avail = snd_pcm_capture_hw_avail(runtime);
2242         if (hw_avail <= 0) {
2243                 ret = 0;
2244                 goto __end;
2245         }
2246         if (frames > (snd_pcm_uframes_t)hw_avail)
2247                 frames = hw_avail;
2248         appl_ptr = runtime->control->appl_ptr - frames;
2249         if (appl_ptr < 0)
2250                 appl_ptr += runtime->boundary;
2251         runtime->control->appl_ptr = appl_ptr;
2252         ret = frames;
2253  __end:
2254         snd_pcm_stream_unlock_irq(substream);
2255         return ret;
2256 }
2257
2258 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2259                                                   snd_pcm_uframes_t frames)
2260 {
2261         struct snd_pcm_runtime *runtime = substream->runtime;
2262         snd_pcm_sframes_t appl_ptr;
2263         snd_pcm_sframes_t ret;
2264         snd_pcm_sframes_t avail;
2265
2266         if (frames == 0)
2267                 return 0;
2268
2269         snd_pcm_stream_lock_irq(substream);
2270         switch (runtime->status->state) {
2271         case SNDRV_PCM_STATE_PREPARED:
2272         case SNDRV_PCM_STATE_PAUSED:
2273                 break;
2274         case SNDRV_PCM_STATE_DRAINING:
2275         case SNDRV_PCM_STATE_RUNNING:
2276                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2277                         break;
2278                 /* Fall through */
2279         case SNDRV_PCM_STATE_XRUN:
2280                 ret = -EPIPE;
2281                 goto __end;
2282         case SNDRV_PCM_STATE_SUSPENDED:
2283                 ret = -ESTRPIPE;
2284                 goto __end;
2285         default:
2286                 ret = -EBADFD;
2287                 goto __end;
2288         }
2289
2290         avail = snd_pcm_playback_avail(runtime);
2291         if (avail <= 0) {
2292                 ret = 0;
2293                 goto __end;
2294         }
2295         if (frames > (snd_pcm_uframes_t)avail)
2296                 frames = avail;
2297         appl_ptr = runtime->control->appl_ptr + frames;
2298         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2299                 appl_ptr -= runtime->boundary;
2300         runtime->control->appl_ptr = appl_ptr;
2301         ret = frames;
2302  __end:
2303         snd_pcm_stream_unlock_irq(substream);
2304         return ret;
2305 }
2306
2307 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2308                                                  snd_pcm_uframes_t frames)
2309 {
2310         struct snd_pcm_runtime *runtime = substream->runtime;
2311         snd_pcm_sframes_t appl_ptr;
2312         snd_pcm_sframes_t ret;
2313         snd_pcm_sframes_t avail;
2314
2315         if (frames == 0)
2316                 return 0;
2317
2318         snd_pcm_stream_lock_irq(substream);
2319         switch (runtime->status->state) {
2320         case SNDRV_PCM_STATE_PREPARED:
2321         case SNDRV_PCM_STATE_DRAINING:
2322         case SNDRV_PCM_STATE_PAUSED:
2323                 break;
2324         case SNDRV_PCM_STATE_RUNNING:
2325                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2326                         break;
2327                 /* Fall through */
2328         case SNDRV_PCM_STATE_XRUN:
2329                 ret = -EPIPE;
2330                 goto __end;
2331         case SNDRV_PCM_STATE_SUSPENDED:
2332                 ret = -ESTRPIPE;
2333                 goto __end;
2334         default:
2335                 ret = -EBADFD;
2336                 goto __end;
2337         }
2338
2339         avail = snd_pcm_capture_avail(runtime);
2340         if (avail <= 0) {
2341                 ret = 0;
2342                 goto __end;
2343         }
2344         if (frames > (snd_pcm_uframes_t)avail)
2345                 frames = avail;
2346         appl_ptr = runtime->control->appl_ptr + frames;
2347         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2348                 appl_ptr -= runtime->boundary;
2349         runtime->control->appl_ptr = appl_ptr;
2350         ret = frames;
2351  __end:
2352         snd_pcm_stream_unlock_irq(substream);
2353         return ret;
2354 }
2355
2356 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2357 {
2358         struct snd_pcm_runtime *runtime = substream->runtime;
2359         int err;
2360
2361         snd_pcm_stream_lock_irq(substream);
2362         switch (runtime->status->state) {
2363         case SNDRV_PCM_STATE_DRAINING:
2364                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2365                         goto __badfd;
2366         case SNDRV_PCM_STATE_RUNNING:
2367                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2368                         break;
2369                 /* Fall through */
2370         case SNDRV_PCM_STATE_PREPARED:
2371         case SNDRV_PCM_STATE_SUSPENDED:
2372                 err = 0;
2373                 break;
2374         case SNDRV_PCM_STATE_XRUN:
2375                 err = -EPIPE;
2376                 break;
2377         default:
2378               __badfd:
2379                 err = -EBADFD;
2380                 break;
2381         }
2382         snd_pcm_stream_unlock_irq(substream);
2383         return err;
2384 }
2385
2386 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2387                          snd_pcm_sframes_t __user *res)
2388 {
2389         struct snd_pcm_runtime *runtime = substream->runtime;
2390         int err;
2391         snd_pcm_sframes_t n = 0;
2392
2393         snd_pcm_stream_lock_irq(substream);
2394         switch (runtime->status->state) {
2395         case SNDRV_PCM_STATE_DRAINING:
2396                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2397                         goto __badfd;
2398         case SNDRV_PCM_STATE_RUNNING:
2399                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2400                         break;
2401                 /* Fall through */
2402         case SNDRV_PCM_STATE_PREPARED:
2403         case SNDRV_PCM_STATE_SUSPENDED:
2404                 err = 0;
2405                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2406                         n = snd_pcm_playback_hw_avail(runtime);
2407                 else
2408                         n = snd_pcm_capture_avail(runtime);
2409                 n += runtime->delay;
2410                 break;
2411         case SNDRV_PCM_STATE_XRUN:
2412                 err = -EPIPE;
2413                 break;
2414         default:
2415               __badfd:
2416                 err = -EBADFD;
2417                 break;
2418         }
2419         snd_pcm_stream_unlock_irq(substream);
2420         if (!err)
2421                 if (put_user(n, res))
2422                         err = -EFAULT;
2423         return err;
2424 }
2425
2426 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2427                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2428 {
2429         struct snd_pcm_runtime *runtime = substream->runtime;
2430         struct snd_pcm_sync_ptr sync_ptr;
2431         volatile struct snd_pcm_mmap_status *status;
2432         volatile struct snd_pcm_mmap_control *control;
2433         int err;
2434
2435         memset(&sync_ptr, 0, sizeof(sync_ptr));
2436         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2437                 return -EFAULT;
2438         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2439                 return -EFAULT;
2440         status = runtime->status;
2441         control = runtime->control;
2442         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2443                 err = snd_pcm_hwsync(substream);
2444                 if (err < 0)
2445                         return err;
2446         }
2447         snd_pcm_stream_lock_irq(substream);
2448         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2449                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2450         else
2451                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2452         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2453                 control->avail_min = sync_ptr.c.control.avail_min;
2454         else
2455                 sync_ptr.c.control.avail_min = control->avail_min;
2456         sync_ptr.s.status.state = status->state;
2457         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2458         sync_ptr.s.status.tstamp = status->tstamp;
2459         sync_ptr.s.status.suspended_state = status->suspended_state;
2460         snd_pcm_stream_unlock_irq(substream);
2461         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2462                 return -EFAULT;
2463         return 0;
2464 }
2465
2466 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2467 {
2468         struct snd_pcm_runtime *runtime = substream->runtime;
2469         int arg;
2470
2471         if (get_user(arg, _arg))
2472                 return -EFAULT;
2473         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2474                 return -EINVAL;
2475         runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2476         if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2477                 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2478         return 0;
2479 }
2480
2481 static int snd_pcm_common_ioctl1(struct file *file,
2482                                  struct snd_pcm_substream *substream,
2483                                  unsigned int cmd, void __user *arg)
2484 {
2485         switch (cmd) {
2486         case SNDRV_PCM_IOCTL_PVERSION:
2487                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2488         case SNDRV_PCM_IOCTL_INFO:
2489                 return snd_pcm_info_user(substream, arg);
2490         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2491                 return 0;
2492         case SNDRV_PCM_IOCTL_TTSTAMP:
2493                 return snd_pcm_tstamp(substream, arg);
2494         case SNDRV_PCM_IOCTL_HW_REFINE:
2495                 return snd_pcm_hw_refine_user(substream, arg);
2496         case SNDRV_PCM_IOCTL_HW_PARAMS:
2497                 return snd_pcm_hw_params_user(substream, arg);
2498         case SNDRV_PCM_IOCTL_HW_FREE:
2499                 return snd_pcm_hw_free(substream);
2500         case SNDRV_PCM_IOCTL_SW_PARAMS:
2501                 return snd_pcm_sw_params_user(substream, arg);
2502         case SNDRV_PCM_IOCTL_STATUS:
2503                 return snd_pcm_status_user(substream, arg);
2504         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2505                 return snd_pcm_channel_info_user(substream, arg);
2506         case SNDRV_PCM_IOCTL_PREPARE:
2507                 return snd_pcm_prepare(substream, file);
2508         case SNDRV_PCM_IOCTL_RESET:
2509                 return snd_pcm_reset(substream);
2510         case SNDRV_PCM_IOCTL_START:
2511                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2512         case SNDRV_PCM_IOCTL_LINK:
2513                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2514         case SNDRV_PCM_IOCTL_UNLINK:
2515                 return snd_pcm_unlink(substream);
2516         case SNDRV_PCM_IOCTL_RESUME:
2517                 return snd_pcm_resume(substream);
2518         case SNDRV_PCM_IOCTL_XRUN:
2519                 return snd_pcm_xrun(substream);
2520         case SNDRV_PCM_IOCTL_HWSYNC:
2521                 return snd_pcm_hwsync(substream);
2522         case SNDRV_PCM_IOCTL_DELAY:
2523                 return snd_pcm_delay(substream, arg);
2524         case SNDRV_PCM_IOCTL_SYNC_PTR:
2525                 return snd_pcm_sync_ptr(substream, arg);
2526 #ifdef CONFIG_SND_SUPPORT_OLD_API
2527         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2528                 return snd_pcm_hw_refine_old_user(substream, arg);
2529         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2530                 return snd_pcm_hw_params_old_user(substream, arg);
2531 #endif
2532         case SNDRV_PCM_IOCTL_DRAIN:
2533                 return snd_pcm_drain(substream, file);
2534         case SNDRV_PCM_IOCTL_DROP:
2535                 return snd_pcm_drop(substream);
2536         case SNDRV_PCM_IOCTL_PAUSE:
2537         {
2538                 int res;
2539                 snd_pcm_stream_lock_irq(substream);
2540                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2541                 snd_pcm_stream_unlock_irq(substream);
2542                 return res;
2543         }
2544         }
2545         snd_printd("unknown ioctl = 0x%x\n", cmd);
2546         return -ENOTTY;
2547 }
2548
2549 static int snd_pcm_playback_ioctl1(struct file *file,
2550                                    struct snd_pcm_substream *substream,
2551                                    unsigned int cmd, void __user *arg)
2552 {
2553         if (snd_BUG_ON(!substream))
2554                 return -ENXIO;
2555         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2556                 return -EINVAL;
2557         switch (cmd) {
2558         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2559         {
2560                 struct snd_xferi xferi;
2561                 struct snd_xferi __user *_xferi = arg;
2562                 struct snd_pcm_runtime *runtime = substream->runtime;
2563                 snd_pcm_sframes_t result;
2564                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2565                         return -EBADFD;
2566                 if (put_user(0, &_xferi->result))
2567                         return -EFAULT;
2568                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2569                         return -EFAULT;
2570                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2571                 __put_user(result, &_xferi->result);
2572                 return result < 0 ? result : 0;
2573         }
2574         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2575         {
2576                 struct snd_xfern xfern;
2577                 struct snd_xfern __user *_xfern = arg;
2578                 struct snd_pcm_runtime *runtime = substream->runtime;
2579                 void __user **bufs;
2580                 snd_pcm_sframes_t result;
2581                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2582                         return -EBADFD;
2583                 if (runtime->channels > 128)
2584                         return -EINVAL;
2585                 if (put_user(0, &_xfern->result))
2586                         return -EFAULT;
2587                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2588                         return -EFAULT;
2589
2590                 bufs = memdup_user(xfern.bufs,
2591                                    sizeof(void *) * runtime->channels);
2592                 if (IS_ERR(bufs))
2593                         return PTR_ERR(bufs);
2594                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2595                 kfree(bufs);
2596                 __put_user(result, &_xfern->result);
2597                 return result < 0 ? result : 0;
2598         }
2599         case SNDRV_PCM_IOCTL_REWIND:
2600         {
2601                 snd_pcm_uframes_t frames;
2602                 snd_pcm_uframes_t __user *_frames = arg;
2603                 snd_pcm_sframes_t result;
2604                 if (get_user(frames, _frames))
2605                         return -EFAULT;
2606                 if (put_user(0, _frames))
2607                         return -EFAULT;
2608                 result = snd_pcm_playback_rewind(substream, frames);
2609                 __put_user(result, _frames);
2610                 return result < 0 ? result : 0;
2611         }
2612         case SNDRV_PCM_IOCTL_FORWARD:
2613         {
2614                 snd_pcm_uframes_t frames;
2615                 snd_pcm_uframes_t __user *_frames = arg;
2616                 snd_pcm_sframes_t result;
2617                 if (get_user(frames, _frames))
2618                         return -EFAULT;
2619                 if (put_user(0, _frames))
2620                         return -EFAULT;
2621                 result = snd_pcm_playback_forward(substream, frames);
2622                 __put_user(result, _frames);
2623                 return result < 0 ? result : 0;
2624         }
2625         }
2626         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2627 }
2628
2629 static int snd_pcm_capture_ioctl1(struct file *file,
2630                                   struct snd_pcm_substream *substream,
2631                                   unsigned int cmd, void __user *arg)
2632 {
2633         if (snd_BUG_ON(!substream))
2634                 return -ENXIO;
2635         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2636                 return -EINVAL;
2637         switch (cmd) {
2638         case SNDRV_PCM_IOCTL_READI_FRAMES:
2639         {
2640                 struct snd_xferi xferi;
2641                 struct snd_xferi __user *_xferi = arg;
2642                 struct snd_pcm_runtime *runtime = substream->runtime;
2643                 snd_pcm_sframes_t result;
2644                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2645                         return -EBADFD;
2646                 if (put_user(0, &_xferi->result))
2647                         return -EFAULT;
2648                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2649                         return -EFAULT;
2650                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2651                 __put_user(result, &_xferi->result);
2652                 return result < 0 ? result : 0;
2653         }
2654         case SNDRV_PCM_IOCTL_READN_FRAMES:
2655         {
2656                 struct snd_xfern xfern;
2657                 struct snd_xfern __user *_xfern = arg;
2658                 struct snd_pcm_runtime *runtime = substream->runtime;
2659                 void *bufs;
2660                 snd_pcm_sframes_t result;
2661                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2662                         return -EBADFD;
2663                 if (runtime->channels > 128)
2664                         return -EINVAL;
2665                 if (put_user(0, &_xfern->result))
2666                         return -EFAULT;
2667                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2668                         return -EFAULT;
2669
2670                 bufs = memdup_user(xfern.bufs,
2671                                    sizeof(void *) * runtime->channels);
2672                 if (IS_ERR(bufs))
2673                         return PTR_ERR(bufs);
2674                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2675                 kfree(bufs);
2676                 __put_user(result, &_xfern->result);
2677                 return result < 0 ? result : 0;
2678         }
2679         case SNDRV_PCM_IOCTL_REWIND:
2680         {
2681                 snd_pcm_uframes_t frames;
2682                 snd_pcm_uframes_t __user *_frames = arg;
2683                 snd_pcm_sframes_t result;
2684                 if (get_user(frames, _frames))
2685                         return -EFAULT;
2686                 if (put_user(0, _frames))
2687                         return -EFAULT;
2688                 result = snd_pcm_capture_rewind(substream, frames);
2689                 __put_user(result, _frames);
2690                 return result < 0 ? result : 0;
2691         }
2692         case SNDRV_PCM_IOCTL_FORWARD:
2693         {
2694                 snd_pcm_uframes_t frames;
2695                 snd_pcm_uframes_t __user *_frames = arg;
2696                 snd_pcm_sframes_t result;
2697                 if (get_user(frames, _frames))
2698                         return -EFAULT;
2699                 if (put_user(0, _frames))
2700                         return -EFAULT;
2701                 result = snd_pcm_capture_forward(substream, frames);
2702                 __put_user(result, _frames);
2703                 return result < 0 ? result : 0;
2704         }
2705         }
2706         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2707 }
2708
2709 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2710                                    unsigned long arg)
2711 {
2712         struct snd_pcm_file *pcm_file;
2713
2714         pcm_file = file->private_data;
2715
2716         if (((cmd >> 8) & 0xff) != 'A')
2717                 return -ENOTTY;
2718
2719         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2720                                        (void __user *)arg);
2721 }
2722
2723 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2724                                   unsigned long arg)
2725 {
2726         struct snd_pcm_file *pcm_file;
2727
2728         pcm_file = file->private_data;
2729
2730         if (((cmd >> 8) & 0xff) != 'A')
2731                 return -ENOTTY;
2732
2733         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2734                                       (void __user *)arg);
2735 }
2736
2737 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2738                          unsigned int cmd, void *arg)
2739 {
2740         mm_segment_t fs;
2741         int result;
2742
2743         fs = snd_enter_user();
2744         switch (substream->stream) {
2745         case SNDRV_PCM_STREAM_PLAYBACK:
2746                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2747                                                  (void __user *)arg);
2748                 break;
2749         case SNDRV_PCM_STREAM_CAPTURE:
2750                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2751                                                 (void __user *)arg);
2752                 break;
2753         default:
2754                 result = -EINVAL;
2755                 break;
2756         }
2757         snd_leave_user(fs);
2758         return result;
2759 }
2760
2761 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2762
2763 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2764                             loff_t * offset)
2765 {
2766         struct snd_pcm_file *pcm_file;
2767         struct snd_pcm_substream *substream;
2768         struct snd_pcm_runtime *runtime;
2769         snd_pcm_sframes_t result;
2770
2771         pcm_file = file->private_data;
2772         substream = pcm_file->substream;
2773         if (PCM_RUNTIME_CHECK(substream))
2774                 return -ENXIO;
2775         runtime = substream->runtime;
2776         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2777                 return -EBADFD;
2778         if (!frame_aligned(runtime, count))
2779                 return -EINVAL;
2780         count = bytes_to_frames(runtime, count);
2781         result = snd_pcm_lib_read(substream, buf, count);
2782         if (result > 0)
2783                 result = frames_to_bytes(runtime, result);
2784         return result;
2785 }
2786
2787 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2788                              size_t count, loff_t * offset)
2789 {
2790         struct snd_pcm_file *pcm_file;
2791         struct snd_pcm_substream *substream;
2792         struct snd_pcm_runtime *runtime;
2793         snd_pcm_sframes_t result;
2794
2795         pcm_file = file->private_data;
2796         substream = pcm_file->substream;
2797         if (PCM_RUNTIME_CHECK(substream))
2798                 return -ENXIO;
2799         runtime = substream->runtime;
2800         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2801                 return -EBADFD;
2802         if (!frame_aligned(runtime, count))
2803                 return -EINVAL;
2804         count = bytes_to_frames(runtime, count);
2805         result = snd_pcm_lib_write(substream, buf, count);
2806         if (result > 0)
2807                 result = frames_to_bytes(runtime, result);
2808         return result;
2809 }
2810
2811 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2812                              unsigned long nr_segs, loff_t pos)
2813
2814 {
2815         struct snd_pcm_file *pcm_file;
2816         struct snd_pcm_substream *substream;
2817         struct snd_pcm_runtime *runtime;
2818         snd_pcm_sframes_t result;
2819         unsigned long i;
2820         void __user **bufs;
2821         snd_pcm_uframes_t frames;
2822
2823         pcm_file = iocb->ki_filp->private_data;
2824         substream = pcm_file->substream;
2825         if (PCM_RUNTIME_CHECK(substream))
2826                 return -ENXIO;
2827         runtime = substream->runtime;
2828         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2829                 return -EBADFD;
2830         if (nr_segs > 1024 || nr_segs != runtime->channels)
2831                 return -EINVAL;
2832         if (!frame_aligned(runtime, iov->iov_len))
2833                 return -EINVAL;
2834         frames = bytes_to_samples(runtime, iov->iov_len);
2835         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2836         if (bufs == NULL)
2837                 return -ENOMEM;
2838         for (i = 0; i < nr_segs; ++i)
2839                 bufs[i] = iov[i].iov_base;
2840         result = snd_pcm_lib_readv(substream, bufs, frames);
2841         if (result > 0)
2842                 result = frames_to_bytes(runtime, result);
2843         kfree(bufs);
2844         return result;
2845 }
2846
2847 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2848                               unsigned long nr_segs, loff_t pos)
2849 {
2850         struct snd_pcm_file *pcm_file;
2851         struct snd_pcm_substream *substream;
2852         struct snd_pcm_runtime *runtime;
2853         snd_pcm_sframes_t result;
2854         unsigned long i;
2855         void __user **bufs;
2856         snd_pcm_uframes_t frames;
2857
2858         pcm_file = iocb->ki_filp->private_data;
2859         substream = pcm_file->substream;
2860         if (PCM_RUNTIME_CHECK(substream))
2861                 return -ENXIO;
2862         runtime = substream->runtime;
2863         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2864                 return -EBADFD;
2865         if (nr_segs > 128 || nr_segs != runtime->channels ||
2866             !frame_aligned(runtime, iov->iov_len))
2867                 return -EINVAL;
2868         frames = bytes_to_samples(runtime, iov->iov_len);
2869         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2870         if (bufs == NULL)
2871                 return -ENOMEM;
2872         for (i = 0; i < nr_segs; ++i)
2873                 bufs[i] = iov[i].iov_base;
2874         result = snd_pcm_lib_writev(substream, bufs, frames);
2875         if (result > 0)
2876                 result = frames_to_bytes(runtime, result);
2877         kfree(bufs);
2878         return result;
2879 }
2880
2881 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2882 {
2883         struct snd_pcm_file *pcm_file;
2884         struct snd_pcm_substream *substream;
2885         struct snd_pcm_runtime *runtime;
2886         unsigned int mask;
2887         snd_pcm_uframes_t avail;
2888
2889         pcm_file = file->private_data;
2890
2891         substream = pcm_file->substream;
2892         if (PCM_RUNTIME_CHECK(substream))
2893                 return -ENXIO;
2894         runtime = substream->runtime;
2895
2896         poll_wait(file, &runtime->sleep, wait);
2897
2898         snd_pcm_stream_lock_irq(substream);
2899         avail = snd_pcm_playback_avail(runtime);
2900         switch (runtime->status->state) {
2901         case SNDRV_PCM_STATE_RUNNING:
2902         case SNDRV_PCM_STATE_PREPARED:
2903         case SNDRV_PCM_STATE_PAUSED:
2904                 if (avail >= runtime->control->avail_min) {
2905                         mask = POLLOUT | POLLWRNORM;
2906                         break;
2907                 }
2908                 /* Fall through */
2909         case SNDRV_PCM_STATE_DRAINING:
2910                 mask = 0;
2911                 break;
2912         default:
2913                 mask = POLLOUT | POLLWRNORM | POLLERR;
2914                 break;
2915         }
2916         snd_pcm_stream_unlock_irq(substream);
2917         return mask;
2918 }
2919
2920 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2921 {
2922         struct snd_pcm_file *pcm_file;
2923         struct snd_pcm_substream *substream;
2924         struct snd_pcm_runtime *runtime;
2925         unsigned int mask;
2926         snd_pcm_uframes_t avail;
2927
2928         pcm_file = file->private_data;
2929
2930         substream = pcm_file->substream;
2931         if (PCM_RUNTIME_CHECK(substream))
2932                 return -ENXIO;
2933         runtime = substream->runtime;
2934
2935         poll_wait(file, &runtime->sleep, wait);
2936
2937         snd_pcm_stream_lock_irq(substream);
2938         avail = snd_pcm_capture_avail(runtime);
2939         switch (runtime->status->state) {
2940         case SNDRV_PCM_STATE_RUNNING:
2941         case SNDRV_PCM_STATE_PREPARED:
2942         case SNDRV_PCM_STATE_PAUSED:
2943                 if (avail >= runtime->control->avail_min) {
2944                         mask = POLLIN | POLLRDNORM;
2945                         break;
2946                 }
2947                 mask = 0;
2948                 break;
2949         case SNDRV_PCM_STATE_DRAINING:
2950                 if (avail > 0) {
2951                         mask = POLLIN | POLLRDNORM;
2952                         break;
2953                 }
2954                 /* Fall through */
2955         default:
2956                 mask = POLLIN | POLLRDNORM | POLLERR;
2957                 break;
2958         }
2959         snd_pcm_stream_unlock_irq(substream);
2960         return mask;
2961 }
2962
2963 /*
2964  * mmap support
2965  */
2966
2967 /*
2968  * Only on coherent architectures, we can mmap the status and the control records
2969  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
2970  */
2971 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2972 /*
2973  * mmap status record
2974  */
2975 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2976                                                 struct vm_fault *vmf)
2977 {
2978         struct snd_pcm_substream *substream = area->vm_private_data;
2979         struct snd_pcm_runtime *runtime;
2980
2981         if (substream == NULL)
2982                 return VM_FAULT_SIGBUS;
2983         runtime = substream->runtime;
2984         vmf->page = virt_to_page(runtime->status);
2985         get_page(vmf->page);
2986         return 0;
2987 }
2988
2989 static const struct vm_operations_struct snd_pcm_vm_ops_status =
2990 {
2991         .fault =        snd_pcm_mmap_status_fault,
2992 };
2993
2994 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
2995                                struct vm_area_struct *area)
2996 {
2997         struct snd_pcm_runtime *runtime;
2998         long size;
2999         if (!(area->vm_flags & VM_READ))
3000                 return -EINVAL;
3001         runtime = substream->runtime;
3002         size = area->vm_end - area->vm_start;
3003         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3004                 return -EINVAL;
3005         area->vm_ops = &snd_pcm_vm_ops_status;
3006         area->vm_private_data = substream;
3007         area->vm_flags |= VM_RESERVED;
3008         return 0;
3009 }
3010
3011 /*
3012  * mmap control record
3013  */
3014 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3015                                                 struct vm_fault *vmf)
3016 {
3017         struct snd_pcm_substream *substream = area->vm_private_data;
3018         struct snd_pcm_runtime *runtime;
3019
3020         if (substream == NULL)
3021                 return VM_FAULT_SIGBUS;
3022         runtime = substream->runtime;
3023         vmf->page = virt_to_page(runtime->control);
3024         get_page(vmf->page);
3025         return 0;
3026 }
3027
3028 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3029 {
3030         .fault =        snd_pcm_mmap_control_fault,
3031 };
3032
3033 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3034                                 struct vm_area_struct *area)
3035 {
3036         struct snd_pcm_runtime *runtime;
3037         long size;
3038         if (!(area->vm_flags & VM_READ))
3039                 return -EINVAL;
3040         runtime = substream->runtime;
3041         size = area->vm_end - area->vm_start;
3042         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3043                 return -EINVAL;
3044         area->vm_ops = &snd_pcm_vm_ops_control;
3045         area->vm_private_data = substream;
3046         area->vm_flags |= VM_RESERVED;
3047         return 0;
3048 }
3049 #else /* ! coherent mmap */
3050 /*
3051  * don't support mmap for status and control records.
3052  */
3053 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3054                                struct vm_area_struct *area)
3055 {
3056         return -ENXIO;
3057 }
3058 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3059                                 struct vm_area_struct *area)
3060 {
3061         return -ENXIO;
3062 }
3063 #endif /* coherent mmap */
3064
3065 static inline struct page *
3066 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3067 {
3068         void *vaddr = substream->runtime->dma_area + ofs;
3069 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3070         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3071                 return virt_to_page(CAC_ADDR(vaddr));
3072 #endif
3073 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3074         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3075                 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3076                 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3077                 /* assume dma_handle set via pfn_to_phys() in
3078                  * mm/dma-noncoherent.c
3079                  */
3080                 return pfn_to_page(addr >> PAGE_SHIFT);
3081         }
3082 #endif
3083         return virt_to_page(vaddr);
3084 }
3085
3086 /*
3087  * fault callback for mmapping a RAM page
3088  */
3089 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3090                                                 struct vm_fault *vmf)
3091 {
3092         struct snd_pcm_substream *substream = area->vm_private_data;
3093         struct snd_pcm_runtime *runtime;
3094         unsigned long offset;
3095         struct page * page;
3096         size_t dma_bytes;
3097
3098         if (substream == NULL)
3099                 return VM_FAULT_SIGBUS;
3100         runtime = substream->runtime;
3101         offset = vmf->pgoff << PAGE_SHIFT;
3102         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3103         if (offset > dma_bytes - PAGE_SIZE)
3104                 return VM_FAULT_SIGBUS;
3105         if (substream->ops->page)
3106                 page = substream->ops->page(substream, offset);
3107         else
3108                 page = snd_pcm_default_page_ops(substream, offset);
3109         if (!page)
3110                 return VM_FAULT_SIGBUS;
3111         get_page(page);
3112         vmf->page = page;
3113         return 0;
3114 }
3115
3116 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3117         .open =         snd_pcm_mmap_data_open,
3118         .close =        snd_pcm_mmap_data_close,
3119 };
3120
3121 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3122         .open =         snd_pcm_mmap_data_open,
3123         .close =        snd_pcm_mmap_data_close,
3124         .fault =        snd_pcm_mmap_data_fault,
3125 };
3126
3127 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3128 /* This should be defined / handled globally! */
3129 #ifdef CONFIG_ARM
3130 #define ARCH_HAS_DMA_MMAP_COHERENT
3131 #endif
3132 #endif
3133
3134 /*
3135  * mmap the DMA buffer on RAM
3136  */
3137 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3138                                 struct vm_area_struct *area)
3139 {
3140         area->vm_flags |= VM_RESERVED;
3141 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3142         if (!substream->ops->page &&
3143             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3144                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3145                                          area,
3146                                          substream->runtime->dma_area,
3147                                          substream->runtime->dma_addr,
3148                                          area->vm_end - area->vm_start);
3149 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3150         /* mmap with fault handler */
3151         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3152         return 0;
3153 }
3154
3155 /*
3156  * mmap the DMA buffer on I/O memory area
3157  */
3158 #if SNDRV_PCM_INFO_MMAP_IOMEM
3159 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3160                            struct vm_area_struct *area)
3161 {
3162         long size;
3163         unsigned long offset;
3164
3165 #ifdef pgprot_noncached
3166         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3167 #endif
3168         area->vm_flags |= VM_IO;
3169         size = area->vm_end - area->vm_start;
3170         offset = area->vm_pgoff << PAGE_SHIFT;
3171         if (io_remap_pfn_range(area, area->vm_start,
3172                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3173                                 size, area->vm_page_prot))
3174                 return -EAGAIN;
3175         return 0;
3176 }
3177
3178 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3179 #endif /* SNDRV_PCM_INFO_MMAP */
3180
3181 /*
3182  * mmap DMA buffer
3183  */
3184 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3185                       struct vm_area_struct *area)
3186 {
3187         struct snd_pcm_runtime *runtime;
3188         long size;
3189         unsigned long offset;
3190         size_t dma_bytes;
3191         int err;
3192
3193         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3194                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3195                         return -EINVAL;
3196         } else {
3197                 if (!(area->vm_flags & VM_READ))
3198                         return -EINVAL;
3199         }
3200         runtime = substream->runtime;
3201         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3202                 return -EBADFD;
3203         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3204                 return -ENXIO;
3205         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3206             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3207                 return -EINVAL;
3208         size = area->vm_end - area->vm_start;
3209         offset = area->vm_pgoff << PAGE_SHIFT;
3210         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3211         if ((size_t)size > dma_bytes)
3212                 return -EINVAL;
3213         if (offset > dma_bytes - size)
3214                 return -EINVAL;
3215
3216         area->vm_ops = &snd_pcm_vm_ops_data;
3217         area->vm_private_data = substream;
3218         if (substream->ops->mmap)
3219                 err = substream->ops->mmap(substream, area);
3220         else
3221                 err = snd_pcm_default_mmap(substream, area);
3222         if (!err)
3223                 atomic_inc(&substream->mmap_count);
3224         return err;
3225 }
3226
3227 EXPORT_SYMBOL(snd_pcm_mmap_data);
3228
3229 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3230 {
3231         struct snd_pcm_file * pcm_file;
3232         struct snd_pcm_substream *substream;
3233         unsigned long offset;
3234
3235         pcm_file = file->private_data;
3236         substream = pcm_file->substream;
3237         if (PCM_RUNTIME_CHECK(substream))
3238                 return -ENXIO;
3239
3240         offset = area->vm_pgoff << PAGE_SHIFT;
3241         switch (offset) {
3242         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3243                 if (pcm_file->no_compat_mmap)
3244                         return -ENXIO;
3245                 return snd_pcm_mmap_status(substream, file, area);
3246         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3247                 if (pcm_file->no_compat_mmap)
3248                         return -ENXIO;
3249                 return snd_pcm_mmap_control(substream, file, area);
3250         default:
3251                 return snd_pcm_mmap_data(substream, file, area);
3252         }
3253         return 0;
3254 }
3255
3256 static int snd_pcm_fasync(int fd, struct file * file, int on)
3257 {
3258         struct snd_pcm_file * pcm_file;
3259         struct snd_pcm_substream *substream;
3260         struct snd_pcm_runtime *runtime;
3261         int err = -ENXIO;
3262
3263         lock_kernel();
3264         pcm_file = file->private_data;
3265         substream = pcm_file->substream;
3266         if (PCM_RUNTIME_CHECK(substream))
3267                 goto out;
3268         runtime = substream->runtime;
3269         err = fasync_helper(fd, file, on, &runtime->fasync);
3270 out:
3271         unlock_kernel();
3272         return err;
3273 }
3274
3275 /*
3276  * ioctl32 compat
3277  */
3278 #ifdef CONFIG_COMPAT
3279 #include "pcm_compat.c"
3280 #else
3281 #define snd_pcm_ioctl_compat    NULL
3282 #endif
3283
3284 /*
3285  *  To be removed helpers to keep binary compatibility
3286  */
3287
3288 #ifdef CONFIG_SND_SUPPORT_OLD_API
3289 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3290 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3291
3292 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3293                                                struct snd_pcm_hw_params_old *oparams)
3294 {
3295         unsigned int i;
3296
3297         memset(params, 0, sizeof(*params));
3298         params->flags = oparams->flags;
3299         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3300                 params->masks[i].bits[0] = oparams->masks[i];
3301         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3302         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3303         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3304         params->info = oparams->info;
3305         params->msbits = oparams->msbits;
3306         params->rate_num = oparams->rate_num;
3307         params->rate_den = oparams->rate_den;
3308         params->fifo_size = oparams->fifo_size;
3309 }
3310
3311 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3312                                              struct snd_pcm_hw_params *params)
3313 {
3314         unsigned int i;
3315
3316         memset(oparams, 0, sizeof(*oparams));
3317         oparams->flags = params->flags;
3318         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3319                 oparams->masks[i] = params->masks[i].bits[0];
3320         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3321         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3322         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3323         oparams->info = params->info;
3324         oparams->msbits = params->msbits;
3325         oparams->rate_num = params->rate_num;
3326         oparams->rate_den = params->rate_den;
3327         oparams->fifo_size = params->fifo_size;
3328 }
3329
3330 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3331                                       struct snd_pcm_hw_params_old __user * _oparams)
3332 {
3333         struct snd_pcm_hw_params *params;
3334         struct snd_pcm_hw_params_old *oparams = NULL;
3335         int err;
3336
3337         params = kmalloc(sizeof(*params), GFP_KERNEL);
3338         if (!params)
3339                 return -ENOMEM;
3340
3341         oparams = memdup_user(_oparams, sizeof(*oparams));
3342         if (IS_ERR(oparams)) {
3343                 err = PTR_ERR(oparams);
3344                 goto out;
3345         }
3346         snd_pcm_hw_convert_from_old_params(params, oparams);
3347         err = snd_pcm_hw_refine(substream, params);
3348         snd_pcm_hw_convert_to_old_params(oparams, params);
3349         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3350                 if (!err)
3351                         err = -EFAULT;
3352         }
3353
3354         kfree(oparams);
3355 out:
3356         kfree(params);
3357         return err;
3358 }
3359
3360 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3361                                       struct snd_pcm_hw_params_old __user * _oparams)
3362 {
3363         struct snd_pcm_hw_params *params;
3364         struct snd_pcm_hw_params_old *oparams = NULL;
3365         int err;
3366
3367         params = kmalloc(sizeof(*params), GFP_KERNEL);
3368         if (!params)
3369                 return -ENOMEM;
3370
3371         oparams = memdup_user(_oparams, sizeof(*oparams));
3372         if (IS_ERR(oparams)) {
3373                 err = PTR_ERR(oparams);
3374                 goto out;
3375         }
3376         snd_pcm_hw_convert_from_old_params(params, oparams);
3377         err = snd_pcm_hw_params(substream, params);
3378         snd_pcm_hw_convert_to_old_params(oparams, params);
3379         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3380                 if (!err)
3381                         err = -EFAULT;
3382         }
3383
3384         kfree(oparams);
3385 out:
3386         kfree(params);
3387         return err;
3388 }
3389 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3390
3391 #ifndef CONFIG_MMU
3392 unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
3393                                       unsigned long len, unsigned long pgoff,
3394                                       unsigned long flags)
3395 {
3396         return 0;
3397 }
3398 #else
3399 # define dummy_get_unmapped_area NULL
3400 #endif
3401
3402 /*
3403  *  Register section
3404  */
3405
3406 const struct file_operations snd_pcm_f_ops[2] = {
3407         {
3408                 .owner =                THIS_MODULE,
3409                 .write =                snd_pcm_write,
3410                 .aio_write =            snd_pcm_aio_write,
3411                 .open =                 snd_pcm_playback_open,
3412                 .release =              snd_pcm_release,
3413                 .poll =                 snd_pcm_playback_poll,
3414                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3415                 .compat_ioctl =         snd_pcm_ioctl_compat,
3416                 .mmap =                 snd_pcm_mmap,
3417                 .fasync =               snd_pcm_fasync,
3418                 .get_unmapped_area =    dummy_get_unmapped_area,
3419         },
3420         {
3421                 .owner =                THIS_MODULE,
3422                 .read =                 snd_pcm_read,
3423                 .aio_read =             snd_pcm_aio_read,
3424                 .open =                 snd_pcm_capture_open,
3425                 .release =              snd_pcm_release,
3426                 .poll =                 snd_pcm_capture_poll,
3427                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3428                 .compat_ioctl =         snd_pcm_ioctl_compat,
3429                 .mmap =                 snd_pcm_mmap,
3430                 .fasync =               snd_pcm_fasync,
3431                 .get_unmapped_area =    dummy_get_unmapped_area,
3432         }
3433 };