SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 <sound/driver.h>
  23 #include <linux/mm.h>
  24 #include <linux/file.h>
  25 #include <linux/slab.h>
  26 #include <linux/time.h>
  27 #include <linux/latency.h>
  28 #include <linux/uio.h>
  29 #include <sound/core.h>
  30 #include <sound/control.h>
  31 #include <sound/info.h>
  32 #include <sound/pcm.h>
  33 #include <sound/pcm_params.h>
  34 #include <sound/timer.h>
  35 #include <sound/minors.h>
  36 #include <asm/io.h>
  37
  38 /*
  39  *  Compatibility
  40  */
  41
  42 struct snd_pcm_hw_params_old {
  43         unsigned int flags;
  44         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
  45                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
  46         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
  47                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
  48         unsigned int rmask;
  49         unsigned int cmask;
  50         unsigned int info;
  51         unsigned int msbits;
  52         unsigned int rate_num;
  53         unsigned int rate_den;
  54         snd_pcm_uframes_t fifo_size;
  55         unsigned char reserved[64];
  56 };
  57
  58 #ifdef CONFIG_SND_SUPPORT_OLD_API
  59 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
  60 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
  61
  62 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
  63                                       struct snd_pcm_hw_params_old __user * _oparams);
  64 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
  65                                       struct snd_pcm_hw_params_old __user * _oparams);
  66 #endif
  67 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
  68
  69 /*
  70  *
  71  */
  72
  73 DEFINE_RWLOCK(snd_pcm_link_rwlock);
  74 EXPORT_SYMBOL(snd_pcm_link_rwlock);
  75
  76 static DECLARE_RWSEM(snd_pcm_link_rwsem);
  77
  78 static inline mm_segment_t snd_enter_user(void)
  79 {
  80         mm_segment_t fs = get_fs();
  81         set_fs(get_ds());
  82         return fs;
  83 }
  84
  85 static inline void snd_leave_user(mm_segment_t fs)
  86 {
  87         set_fs(fs);
  88 }
  89
  90
  91
  92 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
  93 {
  94         struct snd_pcm_runtime *runtime;
  95         struct snd_pcm *pcm = substream->pcm;
  96         struct snd_pcm_str *pstr = substream->pstr;
  97
  98         snd_assert(substream != NULL, return -ENXIO);
  99         memset(info, 0, sizeof(*info));
 100         info->card = pcm->card->number;
 101         info->device = pcm->device;
 102         info->stream = substream->stream;
 103         info->subdevice = substream->number;
 104         strlcpy(info->id, pcm->id, sizeof(info->id));
 105         strlcpy(info->name, pcm->name, sizeof(info->name));
 106         info->dev_class = pcm->dev_class;
 107         info->dev_subclass = pcm->dev_subclass;
 108         info->subdevices_count = pstr->substream_count;
 109         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 110         strlcpy(info->subname, substream->name, sizeof(info->subname));
 111         runtime = substream->runtime;
 112         /* AB: FIXME!!! This is definitely nonsense */
 113         if (runtime) {
 114                 info->sync = runtime->sync;
 115                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
 116         }
 117         return 0;
 118 }
 119
 120 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 121                       struct snd_pcm_info __user * _info)
 122 {
 123         struct snd_pcm_info *info;
 124         int err;
 125
 126         info = kmalloc(sizeof(*info), GFP_KERNEL);
 127         if (! info)
 128                 return -ENOMEM;
 129         err = snd_pcm_info(substream, info);
 130         if (err >= 0) {
 131                 if (copy_to_user(_info, info, sizeof(*info)))
 132                         err = -EFAULT;
 133         }
 134         kfree(info);
 135         return err;
 136 }
 137
 138 #undef RULES_DEBUG
 139
 140 #ifdef RULES_DEBUG
 141 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
 142 char *snd_pcm_hw_param_names[] = {
 143         HW_PARAM(ACCESS),
 144         HW_PARAM(FORMAT),
 145         HW_PARAM(SUBFORMAT),
 146         HW_PARAM(SAMPLE_BITS),
 147         HW_PARAM(FRAME_BITS),
 148         HW_PARAM(CHANNELS),
 149         HW_PARAM(RATE),
 150         HW_PARAM(PERIOD_TIME),
 151         HW_PARAM(PERIOD_SIZE),
 152         HW_PARAM(PERIOD_BYTES),
 153         HW_PARAM(PERIODS),
 154         HW_PARAM(BUFFER_TIME),
 155         HW_PARAM(BUFFER_SIZE),
 156         HW_PARAM(BUFFER_BYTES),
 157         HW_PARAM(TICK_TIME),
 158 };
 159 #endif
 160
 161 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
 162                       struct snd_pcm_hw_params *params)
 163 {
 164         unsigned int k;
 165         struct snd_pcm_hardware *hw;
 166         struct snd_interval *i = NULL;
 167         struct snd_mask *m = NULL;
 168         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
 169         unsigned int rstamps[constrs->rules_num];
 170         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 171         unsigned int stamp = 2;
 172         int changed, again;
 173
 174         params->info = 0;
 175         params->fifo_size = 0;
 176         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
 177                 params->msbits = 0;
 178         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
 179                 params->rate_num = 0;
 180                 params->rate_den = 0;
 181         }
 182
 183         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
 184                 m = hw_param_mask(params, k);
 185                 if (snd_mask_empty(m))
 186                         return -EINVAL;
 187                 if (!(params->rmask & (1 << k)))
 188                         continue;
 189 #ifdef RULES_DEBUG
 190                 printk("%s = ", snd_pcm_hw_param_names[k]);
 191                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 192 #endif
 193                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
 194 #ifdef RULES_DEBUG
 195                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 196 #endif
 197                 if (changed)
 198                         params->cmask |= 1 << k;
 199                 if (changed < 0)
 200                         return changed;
 201         }
 202
 203         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
 204                 i = hw_param_interval(params, k);
 205                 if (snd_interval_empty(i))
 206                         return -EINVAL;
 207                 if (!(params->rmask & (1 << k)))
 208                         continue;
 209 #ifdef RULES_DEBUG
 210                 printk("%s = ", snd_pcm_hw_param_names[k]);
 211                 if (i->empty)
 212                         printk("empty");
 213                 else
 214                         printk("%c%u %u%c",
 215                                i->openmin ? '(' : '[', i->min,
 216                                i->max, i->openmax ? ')' : ']');
 217                 printk(" -> ");
 218 #endif
 219                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
 220 #ifdef RULES_DEBUG
 221                 if (i->empty)
 222                         printk("empty\n");
 223                 else
 224                         printk("%c%u %u%c\n",
 225                                i->openmin ? '(' : '[', i->min,
 226                                i->max, i->openmax ? ')' : ']');
 227 #endif
 228                 if (changed)
 229                         params->cmask |= 1 << k;
 230                 if (changed < 0)
 231                         return changed;
 232         }
 233
 234         for (k = 0; k < constrs->rules_num; k++)
 235                 rstamps[k] = 0;
 236         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
 237                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
 238         do {
 239                 again = 0;
 240                 for (k = 0; k < constrs->rules_num; k++) {
 241                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
 242                         unsigned int d;
 243                         int doit = 0;
 244                         if (r->cond && !(r->cond & params->flags))
 245                                 continue;
 246                         for (d = 0; r->deps[d] >= 0; d++) {
 247                                 if (vstamps[r->deps[d]] > rstamps[k]) {
 248                                         doit = 1;
 249                                         break;
 250                                 }
 251                         }
 252                         if (!doit)
 253                                 continue;
 254 #ifdef RULES_DEBUG
 255                         printk("Rule %d [%p]: ", k, r->func);
 256                         if (r->var >= 0) {
 257                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
 258                                 if (hw_is_mask(r->var)) {
 259                                         m = hw_param_mask(params, r->var);
 260                                         printk("%x", *m->bits);
 261                                 } else {
 262                                         i = hw_param_interval(params, r->var);
 263                                         if (i->empty)
 264                                                 printk("empty");
 265                                         else
 266                                                 printk("%c%u %u%c",
 267                                                        i->openmin ? '(' : '[', i->min,
 268                                                        i->max, i->openmax ? ')' : ']');
 269                                 }
 270                         }
 271 #endif
 272                         changed = r->func(params, r);
 273 #ifdef RULES_DEBUG
 274                         if (r->var >= 0) {
 275                                 printk(" -> ");
 276                                 if (hw_is_mask(r->var))
 277                                         printk("%x", *m->bits);
 278                                 else {
 279                                         if (i->empty)
 280                                                 printk("empty");
 281                                         else
 282                                                 printk("%c%u %u%c",
 283                                                        i->openmin ? '(' : '[', i->min,
 284                                                        i->max, i->openmax ? ')' : ']');
 285                                 }
 286                         }
 287                         printk("\n");
 288 #endif
 289                         rstamps[k] = stamp;
 290                         if (changed && r->var >= 0) {
 291                                 params->cmask |= (1 << r->var);
 292                                 vstamps[r->var] = stamp;
 293                                 again = 1;
 294                         }
 295                         if (changed < 0)
 296                                 return changed;
 297                         stamp++;
 298                 }
 299         } while (again);
 300         if (!params->msbits) {
 301                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
 302                 if (snd_interval_single(i))
 303                         params->msbits = snd_interval_value(i);
 304         }
 305
 306         if (!params->rate_den) {
 307                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 308                 if (snd_interval_single(i)) {
 309                         params->rate_num = snd_interval_value(i);
 310                         params->rate_den = 1;
 311                 }
 312         }
 313
 314         hw = &substream->runtime->hw;
 315         if (!params->info)
 316                 params->info = hw->info;
 317         if (!params->fifo_size)
 318                 params->fifo_size = hw->fifo_size;
 319         params->rmask = 0;
 320         return 0;
 321 }
 322
 323 EXPORT_SYMBOL(snd_pcm_hw_refine);
 324
 325 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 326                                   struct snd_pcm_hw_params __user * _params)
 327 {
 328         struct snd_pcm_hw_params *params;
 329         int err;
 330
 331         params = kmalloc(sizeof(*params), GFP_KERNEL);
 332         if (!params) {
 333                 err = -ENOMEM;
 334                 goto out;
 335         }
 336         if (copy_from_user(params, _params, sizeof(*params))) {
 337                 err = -EFAULT;
 338                 goto out;
 339         }
 340         err = snd_pcm_hw_refine(substream, params);
 341         if (copy_to_user(_params, params, sizeof(*params))) {
 342                 if (!err)
 343                         err = -EFAULT;
 344         }
 345 out:
 346         kfree(params);
 347         return err;
 348 }
 349
 350 static int period_to_usecs(struct snd_pcm_runtime *runtime)
 351 {
 352         int usecs;
 353
 354         if (! runtime->rate)
 355                 return -1; /* invalid */
 356
 357         /* take 75% of period time as the deadline */
 358         usecs = (750000 / runtime->rate) * runtime->period_size;
 359         usecs += ((750000 % runtime->rate) * runtime->period_size) /
 360                 runtime->rate;
 361
 362         return usecs;
 363 }
 364
 365 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 366                              struct snd_pcm_hw_params *params)
 367 {
 368         struct snd_pcm_runtime *runtime;
 369         int err, usecs;
 370         unsigned int bits;
 371         snd_pcm_uframes_t frames;
 372
 373         snd_assert(substream != NULL, return -ENXIO);
 374         runtime = substream->runtime;
 375         snd_assert(runtime != NULL, return -ENXIO);
 376         snd_pcm_stream_lock_irq(substream);
 377         switch (runtime->status->state) {
 378         case SNDRV_PCM_STATE_OPEN:
 379         case SNDRV_PCM_STATE_SETUP:
 380         case SNDRV_PCM_STATE_PREPARED:
 381                 break;
 382         default:
 383                 snd_pcm_stream_unlock_irq(substream);
 384                 return -EBADFD;
 385         }
 386         snd_pcm_stream_unlock_irq(substream);
 387 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 388         if (!substream->oss.oss)
 389 #endif
 390                 if (atomic_read(&substream->mmap_count))
 391                         return -EBADFD;
 392
 393         params->rmask = ~0U;
 394         err = snd_pcm_hw_refine(substream, params);
 395         if (err < 0)
 396                 goto _error;
 397
 398         err = snd_pcm_hw_params_choose(substream, params);
 399         if (err < 0)
 400                 goto _error;
 401
 402         if (substream->ops->hw_params != NULL) {
 403                 err = substream->ops->hw_params(substream, params);
 404                 if (err < 0)
 405                         goto _error;
 406         }
 407
 408         runtime->access = params_access(params);
 409         runtime->format = params_format(params);
 410         runtime->subformat = params_subformat(params);
 411         runtime->channels = params_channels(params);
 412         runtime->rate = params_rate(params);
 413         runtime->period_size = params_period_size(params);
 414         runtime->periods = params_periods(params);
 415         runtime->buffer_size = params_buffer_size(params);
 416         runtime->info = params->info;
 417         runtime->rate_num = params->rate_num;
 418         runtime->rate_den = params->rate_den;
 419
 420         bits = snd_pcm_format_physical_width(runtime->format);
 421         runtime->sample_bits = bits;
 422         bits *= runtime->channels;
 423         runtime->frame_bits = bits;
 424         frames = 1;
 425         while (bits % 8 != 0) {
 426                 bits *= 2;
 427                 frames *= 2;
 428         }
 429         runtime->byte_align = bits / 8;
 430         runtime->min_align = frames;
 431
 432         /* Default sw params */
 433         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 434         runtime->period_step = 1;
 435         runtime->control->avail_min = runtime->period_size;
 436         runtime->start_threshold = 1;
 437         runtime->stop_threshold = runtime->buffer_size;
 438         runtime->silence_threshold = 0;
 439         runtime->silence_size = 0;
 440         runtime->boundary = runtime->buffer_size;
 441         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 442                 runtime->boundary *= 2;
 443
 444         snd_pcm_timer_resolution_change(substream);
 445         runtime->status->state = SNDRV_PCM_STATE_SETUP;
 446
 447         remove_acceptable_latency(substream->latency_id);
 448         if ((usecs = period_to_usecs(runtime)) >= 0)
 449                 set_acceptable_latency(substream->latency_id, usecs);
 450         return 0;
 451  _error:
 452         /* hardware might be unuseable from this time,
 453            so we force application to retry to set
 454            the correct hardware parameter settings */
 455         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 456         if (substream->ops->hw_free != NULL)
 457                 substream->ops->hw_free(substream);
 458         return err;
 459 }
 460
 461 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 462                                   struct snd_pcm_hw_params __user * _params)
 463 {
 464         struct snd_pcm_hw_params *params;
 465         int err;
 466
 467         params = kmalloc(sizeof(*params), GFP_KERNEL);
 468         if (!params) {
 469                 err = -ENOMEM;
 470                 goto out;
 471         }
 472         if (copy_from_user(params, _params, sizeof(*params))) {
 473                 err = -EFAULT;
 474                 goto out;
 475         }
 476         err = snd_pcm_hw_params(substream, params);
 477         if (copy_to_user(_params, params, sizeof(*params))) {
 478                 if (!err)
 479                         err = -EFAULT;
 480         }
 481 out:
 482         kfree(params);
 483         return err;
 484 }
 485
 486 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 487 {
 488         struct snd_pcm_runtime *runtime;
 489         int result = 0;
 490
 491         snd_assert(substream != NULL, return -ENXIO);
 492         runtime = substream->runtime;
 493         snd_assert(runtime != NULL, return -ENXIO);
 494         snd_pcm_stream_lock_irq(substream);
 495         switch (runtime->status->state) {
 496         case SNDRV_PCM_STATE_SETUP:
 497         case SNDRV_PCM_STATE_PREPARED:
 498                 break;
 499         default:
 500                 snd_pcm_stream_unlock_irq(substream);
 501                 return -EBADFD;
 502         }
 503         snd_pcm_stream_unlock_irq(substream);
 504         if (atomic_read(&substream->mmap_count))
 505                 return -EBADFD;
 506         if (substream->ops->hw_free)
 507                 result = substream->ops->hw_free(substream);
 508         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 509         remove_acceptable_latency(substream->latency_id);
 510         return result;
 511 }
 512
 513 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 514                              struct snd_pcm_sw_params *params)
 515 {
 516         struct snd_pcm_runtime *runtime;
 517
 518         snd_assert(substream != NULL, return -ENXIO);
 519         runtime = substream->runtime;
 520         snd_assert(runtime != NULL, return -ENXIO);
 521         snd_pcm_stream_lock_irq(substream);
 522         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 523                 snd_pcm_stream_unlock_irq(substream);
 524                 return -EBADFD;
 525         }
 526         snd_pcm_stream_unlock_irq(substream);
 527
 528         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 529                 return -EINVAL;
 530         if (params->avail_min == 0)
 531                 return -EINVAL;
 532         if (params->silence_size >= runtime->boundary) {
 533                 if (params->silence_threshold != 0)
 534                         return -EINVAL;
 535         } else {
 536                 if (params->silence_size > params->silence_threshold)
 537                         return -EINVAL;
 538                 if (params->silence_threshold > runtime->buffer_size)
 539                         return -EINVAL;
 540         }
 541         snd_pcm_stream_lock_irq(substream);
 542         runtime->tstamp_mode = params->tstamp_mode;
 543         runtime->period_step = params->period_step;
 544         runtime->control->avail_min = params->avail_min;
 545         runtime->start_threshold = params->start_threshold;
 546         runtime->stop_threshold = params->stop_threshold;
 547         runtime->silence_threshold = params->silence_threshold;
 548         runtime->silence_size = params->silence_size;
 549         params->boundary = runtime->boundary;
 550         if (snd_pcm_running(substream)) {
 551                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 552                     runtime->silence_size > 0)
 553                         snd_pcm_playback_silence(substream, ULONG_MAX);
 554                 wake_up(&runtime->sleep);
 555         }
 556         snd_pcm_stream_unlock_irq(substream);
 557         return 0;
 558 }
 559
 560 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 561                                   struct snd_pcm_sw_params __user * _params)
 562 {
 563         struct snd_pcm_sw_params params;
 564         int err;
 565         if (copy_from_user(&params, _params, sizeof(params)))
 566                 return -EFAULT;
 567         err = snd_pcm_sw_params(substream, &params);
 568         if (copy_to_user(_params, &params, sizeof(params)))
 569                 return -EFAULT;
 570         return err;
 571 }
 572
 573 int snd_pcm_status(struct snd_pcm_substream *substream,
 574                    struct snd_pcm_status *status)
 575 {
 576         struct snd_pcm_runtime *runtime = substream->runtime;
 577
 578         snd_pcm_stream_lock_irq(substream);
 579         status->state = runtime->status->state;
 580         status->suspended_state = runtime->status->suspended_state;
 581         if (status->state == SNDRV_PCM_STATE_OPEN)
 582                 goto _end;
 583         status->trigger_tstamp = runtime->trigger_tstamp;
 584         if (snd_pcm_running(substream))
 585                 snd_pcm_update_hw_ptr(substream);
 586         snd_pcm_gettime(runtime, &status->tstamp);
 587         status->appl_ptr = runtime->control->appl_ptr;
 588         status->hw_ptr = runtime->status->hw_ptr;
 589         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 590                 status->avail = snd_pcm_playback_avail(runtime);
 591                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 592                     runtime->status->state == SNDRV_PCM_STATE_DRAINING)
 593                         status->delay = runtime->buffer_size - status->avail;
 594                 else
 595                         status->delay = 0;
 596         } else {
 597                 status->avail = snd_pcm_capture_avail(runtime);
 598                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 599                         status->delay = status->avail;
 600                 else
 601                         status->delay = 0;
 602         }
 603         status->avail_max = runtime->avail_max;
 604         status->overrange = runtime->overrange;
 605         runtime->avail_max = 0;
 606         runtime->overrange = 0;
 607  _end:
 608         snd_pcm_stream_unlock_irq(substream);
 609         return 0;
 610 }
 611
 612 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 613                                struct snd_pcm_status __user * _status)
 614 {
 615         struct snd_pcm_status status;
 616         struct snd_pcm_runtime *runtime;
 617         int res;
 618
 619         snd_assert(substream != NULL, return -ENXIO);
 620         runtime = substream->runtime;
 621         memset(&status, 0, sizeof(status));
 622         res = snd_pcm_status(substream, &status);
 623         if (res < 0)
 624                 return res;
 625         if (copy_to_user(_status, &status, sizeof(status)))
 626                 return -EFAULT;
 627         return 0;
 628 }
 629
 630 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 631                                 struct snd_pcm_channel_info * info)
 632 {
 633         struct snd_pcm_runtime *runtime;
 634         unsigned int channel;
 635
 636         snd_assert(substream != NULL, return -ENXIO);
 637         channel = info->channel;
 638         runtime = substream->runtime;
 639         snd_pcm_stream_lock_irq(substream);
 640         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 641                 snd_pcm_stream_unlock_irq(substream);
 642                 return -EBADFD;
 643         }
 644         snd_pcm_stream_unlock_irq(substream);
 645         if (channel >= runtime->channels)
 646                 return -EINVAL;
 647         memset(info, 0, sizeof(*info));
 648         info->channel = channel;
 649         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 650 }
 651
 652 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 653                                      struct snd_pcm_channel_info __user * _info)
 654 {
 655         struct snd_pcm_channel_info info;
 656         int res;
 657
 658         if (copy_from_user(&info, _info, sizeof(info)))
 659                 return -EFAULT;
 660         res = snd_pcm_channel_info(substream, &info);
 661         if (res < 0)
 662                 return res;
 663         if (copy_to_user(_info, &info, sizeof(info)))
 664                 return -EFAULT;
 665         return 0;
 666 }
 667
 668 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 669 {
 670         struct snd_pcm_runtime *runtime = substream->runtime;
 671         if (runtime->trigger_master == NULL)
 672                 return;
 673         if (runtime->trigger_master == substream) {
 674                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
 675         } else {
 676                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 677                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 678         }
 679         runtime->trigger_master = NULL;
 680 }
 681
 682 struct action_ops {
 683         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 684         int (*do_action)(struct snd_pcm_substream *substream, int state);
 685         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 686         void (*post_action)(struct snd_pcm_substream *substream, int state);
 687 };
 688
 689 /*
 690  *  this functions is core for handling of linked stream
 691  *  Note: the stream state might be changed also on failure
 692  *  Note2: call with calling stream lock + link lock
 693  */
 694 static int snd_pcm_action_group(struct action_ops *ops,
 695                                 struct snd_pcm_substream *substream,
 696                                 int state, int do_lock)
 697 {
 698         struct snd_pcm_substream *s = NULL;
 699         struct snd_pcm_substream *s1;
 700         int res = 0;
 701
 702         snd_pcm_group_for_each_entry(s, substream) {
 703                 if (do_lock && s != substream)
 704                         spin_lock_nested(&s->self_group.lock,
 705                                          SINGLE_DEPTH_NESTING);
 706                 res = ops->pre_action(s, state);
 707                 if (res < 0)
 708                         goto _unlock;
 709         }
 710         snd_pcm_group_for_each_entry(s, substream) {
 711                 res = ops->do_action(s, state);
 712                 if (res < 0) {
 713                         if (ops->undo_action) {
 714                                 snd_pcm_group_for_each_entry(s1, substream) {
 715                                         if (s1 == s) /* failed stream */
 716                                                 break;
 717                                         ops->undo_action(s1, state);
 718                                 }
 719                         }
 720                         s = NULL; /* unlock all */
 721                         goto _unlock;
 722                 }
 723         }
 724         snd_pcm_group_for_each_entry(s, substream) {
 725                 ops->post_action(s, state);
 726         }
 727  _unlock:
 728         if (do_lock) {
 729                 /* unlock streams */
 730                 snd_pcm_group_for_each_entry(s1, substream) {
 731                         if (s1 != substream)
 732                                 spin_unlock(&s1->self_group.lock);
 733                         if (s1 == s)    /* end */
 734                                 break;
 735                 }
 736         }
 737         return res;
 738 }
 739
 740 /*
 741  *  Note: call with stream lock
 742  */
 743 static int snd_pcm_action_single(struct action_ops *ops,
 744                                  struct snd_pcm_substream *substream,
 745                                  int state)
 746 {
 747         int res;
 748
 749         res = ops->pre_action(substream, state);
 750         if (res < 0)
 751                 return res;
 752         res = ops->do_action(substream, state);
 753         if (res == 0)
 754                 ops->post_action(substream, state);
 755         else if (ops->undo_action)
 756                 ops->undo_action(substream, state);
 757         return res;
 758 }
 759
 760 /*
 761  *  Note: call with stream lock
 762  */
 763 static int snd_pcm_action(struct action_ops *ops,
 764                           struct snd_pcm_substream *substream,
 765                           int state)
 766 {
 767         int res;
 768
 769         if (snd_pcm_stream_linked(substream)) {
 770                 if (!spin_trylock(&substream->group->lock)) {
 771                         spin_unlock(&substream->self_group.lock);
 772                         spin_lock(&substream->group->lock);
 773                         spin_lock(&substream->self_group.lock);
 774                 }
 775                 res = snd_pcm_action_group(ops, substream, state, 1);
 776                 spin_unlock(&substream->group->lock);
 777         } else {
 778                 res = snd_pcm_action_single(ops, substream, state);
 779         }
 780         return res;
 781 }
 782
 783 /*
 784  *  Note: don't use any locks before
 785  */
 786 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 787                                    struct snd_pcm_substream *substream,
 788                                    int state)
 789 {
 790         int res;
 791
 792         read_lock_irq(&snd_pcm_link_rwlock);
 793         if (snd_pcm_stream_linked(substream)) {
 794                 spin_lock(&substream->group->lock);
 795                 spin_lock(&substream->self_group.lock);
 796                 res = snd_pcm_action_group(ops, substream, state, 1);
 797                 spin_unlock(&substream->self_group.lock);
 798                 spin_unlock(&substream->group->lock);
 799         } else {
 800                 spin_lock(&substream->self_group.lock);
 801                 res = snd_pcm_action_single(ops, substream, state);
 802                 spin_unlock(&substream->self_group.lock);
 803         }
 804         read_unlock_irq(&snd_pcm_link_rwlock);
 805         return res;
 806 }
 807
 808 /*
 809  */
 810 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 811                                     struct snd_pcm_substream *substream,
 812                                     int state)
 813 {
 814         int res;
 815
 816         down_read(&snd_pcm_link_rwsem);
 817         if (snd_pcm_stream_linked(substream))
 818                 res = snd_pcm_action_group(ops, substream, state, 0);
 819         else
 820                 res = snd_pcm_action_single(ops, substream, state);
 821         up_read(&snd_pcm_link_rwsem);
 822         return res;
 823 }
 824
 825 /*
 826  * start callbacks
 827  */
 828 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 829 {
 830         struct snd_pcm_runtime *runtime = substream->runtime;
 831         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 832                 return -EBADFD;
 833         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 834             !snd_pcm_playback_data(substream))
 835                 return -EPIPE;
 836         runtime->trigger_master = substream;
 837         return 0;
 838 }
 839
 840 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 841 {
 842         if (substream->runtime->trigger_master != substream)
 843                 return 0;
 844         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
 845 }
 846
 847 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
 848 {
 849         if (substream->runtime->trigger_master == substream)
 850                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 851 }
 852
 853 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
 854 {
 855         struct snd_pcm_runtime *runtime = substream->runtime;
 856         snd_pcm_trigger_tstamp(substream);
 857         runtime->status->state = state;
 858         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 859             runtime->silence_size > 0)
 860                 snd_pcm_playback_silence(substream, ULONG_MAX);
 861         if (substream->timer)
 862                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
 863                                  &runtime->trigger_tstamp);
 864 }
 865
 866 static struct action_ops snd_pcm_action_start = {
 867         .pre_action = snd_pcm_pre_start,
 868         .do_action = snd_pcm_do_start,
 869         .undo_action = snd_pcm_undo_start,
 870         .post_action = snd_pcm_post_start
 871 };
 872
 873 /**
 874  * snd_pcm_start
 875  * @substream: the PCM substream instance
 876  *
 877  * Start all linked streams.
 878  */
 879 int snd_pcm_start(struct snd_pcm_substream *substream)
 880 {
 881         return snd_pcm_action(&snd_pcm_action_start, substream,
 882                               SNDRV_PCM_STATE_RUNNING);
 883 }
 884
 885 /*
 886  * stop callbacks
 887  */
 888 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
 889 {
 890         struct snd_pcm_runtime *runtime = substream->runtime;
 891         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 892                 return -EBADFD;
 893         runtime->trigger_master = substream;
 894         return 0;
 895 }
 896
 897 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
 898 {
 899         if (substream->runtime->trigger_master == substream &&
 900             snd_pcm_running(substream))
 901                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 902         return 0; /* unconditonally stop all substreams */
 903 }
 904
 905 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
 906 {
 907         struct snd_pcm_runtime *runtime = substream->runtime;
 908         if (runtime->status->state != state) {
 909                 snd_pcm_trigger_tstamp(substream);
 910                 if (substream->timer)
 911                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
 912                                          &runtime->trigger_tstamp);
 913                 runtime->status->state = state;
 914         }
 915         wake_up(&runtime->sleep);
 916 }
 917
 918 static struct action_ops snd_pcm_action_stop = {
 919         .pre_action = snd_pcm_pre_stop,
 920         .do_action = snd_pcm_do_stop,
 921         .post_action = snd_pcm_post_stop
 922 };
 923
 924 /**
 925  * snd_pcm_stop
 926  * @substream: the PCM substream instance
 927  * @state: PCM state after stopping the stream
 928  *
 929  * Try to stop all running streams in the substream group.
 930  * The state of each stream is changed to the given value after that unconditionally.
 931  */
 932 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
 933 {
 934         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
 935 }
 936
 937 EXPORT_SYMBOL(snd_pcm_stop);
 938
 939 /**
 940  * snd_pcm_drain_done
 941  * @substream: the PCM substream
 942  *
 943  * Stop the DMA only when the given stream is playback.
 944  * The state is changed to SETUP.
 945  * Unlike snd_pcm_stop(), this affects only the given stream.
 946  */
 947 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
 948 {
 949         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
 950                                      SNDRV_PCM_STATE_SETUP);
 951 }
 952
 953 /*
 954  * pause callbacks
 955  */
 956 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
 957 {
 958         struct snd_pcm_runtime *runtime = substream->runtime;
 959         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
 960                 return -ENOSYS;
 961         if (push) {
 962                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
 963                         return -EBADFD;
 964         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
 965                 return -EBADFD;
 966         runtime->trigger_master = substream;
 967         return 0;
 968 }
 969
 970 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
 971 {
 972         if (substream->runtime->trigger_master != substream)
 973                 return 0;
 974         return substream->ops->trigger(substream,
 975                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
 976                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
 977 }
 978
 979 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
 980 {
 981         if (substream->runtime->trigger_master == substream)
 982                 substream->ops->trigger(substream,
 983                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
 984                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
 985 }
 986
 987 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
 988 {
 989         struct snd_pcm_runtime *runtime = substream->runtime;
 990         snd_pcm_trigger_tstamp(substream);
 991         if (push) {
 992                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
 993                 if (substream->timer)
 994                         snd_timer_notify(substream->timer,
 995                                          SNDRV_TIMER_EVENT_MPAUSE,
 996                                          &runtime->trigger_tstamp);
 997                 wake_up(&runtime->sleep);
 998         } else {
 999                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1000                 if (substream->timer)
1001                         snd_timer_notify(substream->timer,
1002                                          SNDRV_TIMER_EVENT_MCONTINUE,
1003                                          &runtime->trigger_tstamp);
1004         }
1005 }
1006
1007 static struct action_ops snd_pcm_action_pause = {
1008         .pre_action = snd_pcm_pre_pause,
1009         .do_action = snd_pcm_do_pause,
1010         .undo_action = snd_pcm_undo_pause,
1011         .post_action = snd_pcm_post_pause
1012 };
1013
1014 /*
1015  * Push/release the pause for all linked streams.
1016  */
1017 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1018 {
1019         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1020 }
1021
1022 #ifdef CONFIG_PM
1023 /* suspend */
1024
1025 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1026 {
1027         struct snd_pcm_runtime *runtime = substream->runtime;
1028         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1029                 return -EBUSY;
1030         runtime->trigger_master = substream;
1031         return 0;
1032 }
1033
1034 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1035 {
1036         struct snd_pcm_runtime *runtime = substream->runtime;
1037         if (runtime->trigger_master != substream)
1038                 return 0;
1039         if (! snd_pcm_running(substream))
1040                 return 0;
1041         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1042         return 0; /* suspend unconditionally */
1043 }
1044
1045 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1046 {
1047         struct snd_pcm_runtime *runtime = substream->runtime;
1048         snd_pcm_trigger_tstamp(substream);
1049         if (substream->timer)
1050                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1051                                  &runtime->trigger_tstamp);
1052         runtime->status->suspended_state = runtime->status->state;
1053         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1054         wake_up(&runtime->sleep);
1055 }
1056
1057 static struct action_ops snd_pcm_action_suspend = {
1058         .pre_action = snd_pcm_pre_suspend,
1059         .do_action = snd_pcm_do_suspend,
1060         .post_action = snd_pcm_post_suspend
1061 };
1062
1063 /**
1064  * snd_pcm_suspend
1065  * @substream: the PCM substream
1066  *
1067  * Trigger SUSPEND to all linked streams.
1068  * After this call, all streams are changed to SUSPENDED state.
1069  */
1070 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1071 {
1072         int err;
1073         unsigned long flags;
1074
1075         if (! substream)
1076                 return 0;
1077
1078         snd_pcm_stream_lock_irqsave(substream, flags);
1079         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1080         snd_pcm_stream_unlock_irqrestore(substream, flags);
1081         return err;
1082 }
1083
1084 EXPORT_SYMBOL(snd_pcm_suspend);
1085
1086 /**
1087  * snd_pcm_suspend_all
1088  * @pcm: the PCM instance
1089  *
1090  * Trigger SUSPEND to all substreams in the given pcm.
1091  * After this call, all streams are changed to SUSPENDED state.
1092  */
1093 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1094 {
1095         struct snd_pcm_substream *substream;
1096         int stream, err = 0;
1097
1098         if (! pcm)
1099                 return 0;
1100
1101         for (stream = 0; stream < 2; stream++) {
1102                 for (substream = pcm->streams[stream].substream;
1103                      substream; substream = substream->next) {
1104                         /* FIXME: the open/close code should lock this as well */
1105                         if (substream->runtime == NULL)
1106                                 continue;
1107                         err = snd_pcm_suspend(substream);
1108                         if (err < 0 && err != -EBUSY)
1109                                 return err;
1110                 }
1111         }
1112         return 0;
1113 }
1114
1115 EXPORT_SYMBOL(snd_pcm_suspend_all);
1116
1117 /* resume */
1118
1119 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1120 {
1121         struct snd_pcm_runtime *runtime = substream->runtime;
1122         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1123                 return -ENOSYS;
1124         runtime->trigger_master = substream;
1125         return 0;
1126 }
1127
1128 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1129 {
1130         struct snd_pcm_runtime *runtime = substream->runtime;
1131         if (runtime->trigger_master != substream)
1132                 return 0;
1133         /* DMA not running previously? */
1134         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1135             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1136              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1137                 return 0;
1138         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1139 }
1140
1141 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1142 {
1143         if (substream->runtime->trigger_master == substream &&
1144             snd_pcm_running(substream))
1145                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1146 }
1147
1148 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1149 {
1150         struct snd_pcm_runtime *runtime = substream->runtime;
1151         snd_pcm_trigger_tstamp(substream);
1152         if (substream->timer)
1153                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1154                                  &runtime->trigger_tstamp);
1155         runtime->status->state = runtime->status->suspended_state;
1156 }
1157
1158 static struct action_ops snd_pcm_action_resume = {
1159         .pre_action = snd_pcm_pre_resume,
1160         .do_action = snd_pcm_do_resume,
1161         .undo_action = snd_pcm_undo_resume,
1162         .post_action = snd_pcm_post_resume
1163 };
1164
1165 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1166 {
1167         struct snd_card *card = substream->pcm->card;
1168         int res;
1169
1170         snd_power_lock(card);
1171         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1172                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1173         snd_power_unlock(card);
1174         return res;
1175 }
1176
1177 #else
1178
1179 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1180 {
1181         return -ENOSYS;
1182 }
1183
1184 #endif /* CONFIG_PM */
1185
1186 /*
1187  * xrun ioctl
1188  *
1189  * Change the RUNNING stream(s) to XRUN state.
1190  */
1191 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1192 {
1193         struct snd_card *card = substream->pcm->card;
1194         struct snd_pcm_runtime *runtime = substream->runtime;
1195         int result;
1196
1197         snd_power_lock(card);
1198         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1199                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1200                 if (result < 0)
1201                         goto _unlock;
1202         }
1203
1204         snd_pcm_stream_lock_irq(substream);
1205         switch (runtime->status->state) {
1206         case SNDRV_PCM_STATE_XRUN:
1207                 result = 0;     /* already there */
1208                 break;
1209         case SNDRV_PCM_STATE_RUNNING:
1210                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1211                 break;
1212         default:
1213                 result = -EBADFD;
1214         }
1215         snd_pcm_stream_unlock_irq(substream);
1216  _unlock:
1217         snd_power_unlock(card);
1218         return result;
1219 }
1220
1221 /*
1222  * reset ioctl
1223  */
1224 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1225 {
1226         struct snd_pcm_runtime *runtime = substream->runtime;
1227         switch (runtime->status->state) {
1228         case SNDRV_PCM_STATE_RUNNING:
1229         case SNDRV_PCM_STATE_PREPARED:
1230         case SNDRV_PCM_STATE_PAUSED:
1231         case SNDRV_PCM_STATE_SUSPENDED:
1232                 return 0;
1233         default:
1234                 return -EBADFD;
1235         }
1236 }
1237
1238 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1239 {
1240         struct snd_pcm_runtime *runtime = substream->runtime;
1241         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1242         if (err < 0)
1243                 return err;
1244         // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1245         runtime->hw_ptr_base = 0;
1246         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1247                 runtime->status->hw_ptr % runtime->period_size;
1248         runtime->silence_start = runtime->status->hw_ptr;
1249         runtime->silence_filled = 0;
1250         return 0;
1251 }
1252
1253 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1254 {
1255         struct snd_pcm_runtime *runtime = substream->runtime;
1256         runtime->control->appl_ptr = runtime->status->hw_ptr;
1257         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1258             runtime->silence_size > 0)
1259                 snd_pcm_playback_silence(substream, ULONG_MAX);
1260 }
1261
1262 static struct action_ops snd_pcm_action_reset = {
1263         .pre_action = snd_pcm_pre_reset,
1264         .do_action = snd_pcm_do_reset,
1265         .post_action = snd_pcm_post_reset
1266 };
1267
1268 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1269 {
1270         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1271 }
1272
1273 /*
1274  * prepare ioctl
1275  */
1276 /* we use the second argument for updating f_flags */
1277 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1278                                int f_flags)
1279 {
1280         struct snd_pcm_runtime *runtime = substream->runtime;
1281         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1282             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1283                 return -EBADFD;
1284         if (snd_pcm_running(substream))
1285                 return -EBUSY;
1286         substream->f_flags = f_flags;
1287         return 0;
1288 }
1289
1290 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1291 {
1292         int err;
1293         err = substream->ops->prepare(substream);
1294         if (err < 0)
1295                 return err;
1296         return snd_pcm_do_reset(substream, 0);
1297 }
1298
1299 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1300 {
1301         struct snd_pcm_runtime *runtime = substream->runtime;
1302         runtime->control->appl_ptr = runtime->status->hw_ptr;
1303         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1304 }
1305
1306 static struct action_ops snd_pcm_action_prepare = {
1307         .pre_action = snd_pcm_pre_prepare,
1308         .do_action = snd_pcm_do_prepare,
1309         .post_action = snd_pcm_post_prepare
1310 };
1311
1312 /**
1313  * snd_pcm_prepare
1314  * @substream: the PCM substream instance
1315  * @file: file to refer f_flags
1316  *
1317  * Prepare the PCM substream to be triggerable.
1318  */
1319 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1320                            struct file *file)
1321 {
1322         int res;
1323         struct snd_card *card = substream->pcm->card;
1324         int f_flags;
1325
1326         if (file)
1327                 f_flags = file->f_flags;
1328         else
1329                 f_flags = substream->f_flags;
1330
1331         snd_power_lock(card);
1332         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1333                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1334                                                substream, f_flags);
1335         snd_power_unlock(card);
1336         return res;
1337 }
1338
1339 /*
1340  * drain ioctl
1341  */
1342
1343 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1344 {
1345         if (substream->f_flags & O_NONBLOCK)
1346                 return -EAGAIN;
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 struct drain_rec {
1392         struct snd_pcm_substream *substream;
1393         wait_queue_t wait;
1394         snd_pcm_uframes_t stop_threshold;
1395 };
1396
1397 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1398
1399 /*
1400  * Drain the stream(s).
1401  * When the substream is linked, sync until the draining of all playback streams
1402  * is finished.
1403  * After this call, all streams are supposed to be either SETUP or DRAINING
1404  * (capture only) state.
1405  */
1406 static int snd_pcm_drain(struct snd_pcm_substream *substream)
1407 {
1408         struct snd_card *card;
1409         struct snd_pcm_runtime *runtime;
1410         struct snd_pcm_substream *s;
1411         int result = 0;
1412         int i, num_drecs;
1413         struct drain_rec *drec, drec_tmp, *d;
1414
1415         snd_assert(substream != NULL, return -ENXIO);
1416         card = substream->pcm->card;
1417         runtime = substream->runtime;
1418
1419         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1420                 return -EBADFD;
1421
1422         snd_power_lock(card);
1423         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1424                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1425                 if (result < 0) {
1426                         snd_power_unlock(card);
1427                         return result;
1428                 }
1429         }
1430
1431         /* allocate temporary record for drain sync */
1432         down_read(&snd_pcm_link_rwsem);
1433         if (snd_pcm_stream_linked(substream)) {
1434                 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1435                 if (! drec) {
1436                         up_read(&snd_pcm_link_rwsem);
1437                         snd_power_unlock(card);
1438                         return -ENOMEM;
1439                 }
1440         } else
1441                 drec = &drec_tmp;
1442
1443         /* count only playback streams */
1444         num_drecs = 0;
1445         snd_pcm_group_for_each_entry(s, substream) {
1446                 runtime = s->runtime;
1447                 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1448                         d = &drec[num_drecs++];
1449                         d->substream = s;
1450                         init_waitqueue_entry(&d->wait, current);
1451                         add_wait_queue(&runtime->sleep, &d->wait);
1452                         /* stop_threshold fixup to avoid endless loop when
1453                          * stop_threshold > buffer_size
1454                          */
1455                         d->stop_threshold = runtime->stop_threshold;
1456                         if (runtime->stop_threshold > runtime->buffer_size)
1457                                 runtime->stop_threshold = runtime->buffer_size;
1458                 }
1459         }
1460         up_read(&snd_pcm_link_rwsem);
1461
1462         snd_pcm_stream_lock_irq(substream);
1463         /* resume pause */
1464         if (substream->runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1465                 snd_pcm_pause(substream, 0);
1466
1467         /* pre-start/stop - all running streams are changed to DRAINING state */
1468         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1469         if (result < 0) {
1470                 snd_pcm_stream_unlock_irq(substream);
1471                 goto _error;
1472         }
1473
1474         for (;;) {
1475                 long tout;
1476                 if (signal_pending(current)) {
1477                         result = -ERESTARTSYS;
1478                         break;
1479                 }
1480                 /* all finished? */
1481                 for (i = 0; i < num_drecs; i++) {
1482                         runtime = drec[i].substream->runtime;
1483                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1484                                 break;
1485                 }
1486                 if (i == num_drecs)
1487                         break; /* yes, all drained */
1488
1489                 set_current_state(TASK_INTERRUPTIBLE);
1490                 snd_pcm_stream_unlock_irq(substream);
1491                 snd_power_unlock(card);
1492                 tout = schedule_timeout(10 * HZ);
1493                 snd_power_lock(card);
1494                 snd_pcm_stream_lock_irq(substream);
1495                 if (tout == 0) {
1496                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1497                                 result = -ESTRPIPE;
1498                         else {
1499                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1500                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1501                                 result = -EIO;
1502                         }
1503                         break;
1504                 }
1505         }
1506
1507         snd_pcm_stream_unlock_irq(substream);
1508
1509  _error:
1510         for (i = 0; i < num_drecs; i++) {
1511                 d = &drec[i];
1512                 runtime = d->substream->runtime;
1513                 remove_wait_queue(&runtime->sleep, &d->wait);
1514                 runtime->stop_threshold = d->stop_threshold;
1515         }
1516
1517         if (drec != &drec_tmp)
1518                 kfree(drec);
1519         snd_power_unlock(card);
1520
1521         return result;
1522 }
1523
1524 /*
1525  * drop ioctl
1526  *
1527  * Immediately put all linked substreams into SETUP state.
1528  */
1529 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1530 {
1531         struct snd_pcm_runtime *runtime;
1532         struct snd_card *card;
1533         int result = 0;
1534
1535         snd_assert(substream != NULL, return -ENXIO);
1536         runtime = substream->runtime;
1537         card = substream->pcm->card;
1538
1539         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1540             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1541                 return -EBADFD;
1542
1543         snd_power_lock(card);
1544         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1545                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1546                 if (result < 0)
1547                         goto _unlock;
1548         }
1549
1550         snd_pcm_stream_lock_irq(substream);
1551         /* resume pause */
1552         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1553                 snd_pcm_pause(substream, 0);
1554
1555         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1556         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1557         snd_pcm_stream_unlock_irq(substream);
1558  _unlock:
1559         snd_power_unlock(card);
1560         return result;
1561 }
1562
1563
1564 /* WARNING: Don't forget to fput back the file */
1565 static struct file *snd_pcm_file_fd(int fd)
1566 {
1567         struct file *file;
1568         struct inode *inode;
1569         unsigned int minor;
1570
1571         file = fget(fd);
1572         if (!file)
1573                 return NULL;
1574         inode = file->f_path.dentry->d_inode;
1575         if (!S_ISCHR(inode->i_mode) ||
1576             imajor(inode) != snd_major) {
1577                 fput(file);
1578                 return NULL;
1579         }
1580         minor = iminor(inode);
1581         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1582             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1583                 fput(file);
1584                 return NULL;
1585         }
1586         return file;
1587 }
1588
1589 /*
1590  * PCM link handling
1591  */
1592 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1593 {
1594         int res = 0;
1595         struct file *file;
1596         struct snd_pcm_file *pcm_file;
1597         struct snd_pcm_substream *substream1;
1598
1599         file = snd_pcm_file_fd(fd);
1600         if (!file)
1601                 return -EBADFD;
1602         pcm_file = file->private_data;
1603         substream1 = pcm_file->substream;
1604         down_write(&snd_pcm_link_rwsem);
1605         write_lock_irq(&snd_pcm_link_rwlock);
1606         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1607             substream->runtime->status->state != substream1->runtime->status->state) {
1608                 res = -EBADFD;
1609                 goto _end;
1610         }
1611         if (snd_pcm_stream_linked(substream1)) {
1612                 res = -EALREADY;
1613                 goto _end;
1614         }
1615         if (!snd_pcm_stream_linked(substream)) {
1616                 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1617                 if (substream->group == NULL) {
1618                         res = -ENOMEM;
1619                         goto _end;
1620                 }
1621                 spin_lock_init(&substream->group->lock);
1622                 INIT_LIST_HEAD(&substream->group->substreams);
1623                 list_add_tail(&substream->link_list, &substream->group->substreams);
1624                 substream->group->count = 1;
1625         }
1626         list_add_tail(&substream1->link_list, &substream->group->substreams);
1627         substream->group->count++;
1628         substream1->group = substream->group;
1629  _end:
1630         write_unlock_irq(&snd_pcm_link_rwlock);
1631         up_write(&snd_pcm_link_rwsem);
1632         fput(file);
1633         return res;
1634 }
1635
1636 static void relink_to_local(struct snd_pcm_substream *substream)
1637 {
1638         substream->group = &substream->self_group;
1639         INIT_LIST_HEAD(&substream->self_group.substreams);
1640         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1641 }
1642
1643 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1644 {
1645         struct snd_pcm_substream *s;
1646         int res = 0;
1647
1648         down_write(&snd_pcm_link_rwsem);
1649         write_lock_irq(&snd_pcm_link_rwlock);
1650         if (!snd_pcm_stream_linked(substream)) {
1651                 res = -EALREADY;
1652                 goto _end;
1653         }
1654         list_del(&substream->link_list);
1655         substream->group->count--;
1656         if (substream->group->count == 1) {     /* detach the last stream, too */
1657                 snd_pcm_group_for_each_entry(s, substream) {
1658                         relink_to_local(s);
1659                         break;
1660                 }
1661                 kfree(substream->group);
1662         }
1663         relink_to_local(substream);
1664        _end:
1665         write_unlock_irq(&snd_pcm_link_rwlock);
1666         up_write(&snd_pcm_link_rwsem);
1667         return res;
1668 }
1669
1670 /*
1671  * hw configurator
1672  */
1673 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1674                                struct snd_pcm_hw_rule *rule)
1675 {
1676         struct snd_interval t;
1677         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1678                      hw_param_interval_c(params, rule->deps[1]), &t);
1679         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1680 }
1681
1682 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1683                                struct snd_pcm_hw_rule *rule)
1684 {
1685         struct snd_interval t;
1686         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1687                      hw_param_interval_c(params, rule->deps[1]), &t);
1688         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1689 }
1690
1691 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1692                                    struct snd_pcm_hw_rule *rule)
1693 {
1694         struct snd_interval t;
1695         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1696                          hw_param_interval_c(params, rule->deps[1]),
1697                          (unsigned long) rule->private, &t);
1698         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1699 }
1700
1701 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1702                                    struct snd_pcm_hw_rule *rule)
1703 {
1704         struct snd_interval t;
1705         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1706                          (unsigned long) rule->private,
1707                          hw_param_interval_c(params, rule->deps[1]), &t);
1708         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1709 }
1710
1711 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1712                                   struct snd_pcm_hw_rule *rule)
1713 {
1714         unsigned int k;
1715         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1716         struct snd_mask m;
1717         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1718         snd_mask_any(&m);
1719         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1720                 int bits;
1721                 if (! snd_mask_test(mask, k))
1722                         continue;
1723                 bits = snd_pcm_format_physical_width(k);
1724                 if (bits <= 0)
1725                         continue; /* ignore invalid formats */
1726                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1727                         snd_mask_reset(&m, k);
1728         }
1729         return snd_mask_refine(mask, &m);
1730 }
1731
1732 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1733                                        struct snd_pcm_hw_rule *rule)
1734 {
1735         struct snd_interval t;
1736         unsigned int k;
1737         t.min = UINT_MAX;
1738         t.max = 0;
1739         t.openmin = 0;
1740         t.openmax = 0;
1741         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1742                 int bits;
1743                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1744                         continue;
1745                 bits = snd_pcm_format_physical_width(k);
1746                 if (bits <= 0)
1747                         continue; /* ignore invalid formats */
1748                 if (t.min > (unsigned)bits)
1749                         t.min = bits;
1750                 if (t.max < (unsigned)bits)
1751                         t.max = bits;
1752         }
1753         t.integer = 1;
1754         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1755 }
1756
1757 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1758 #error "Change this table"
1759 #endif
1760
1761 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1762                                  48000, 64000, 88200, 96000, 176400, 192000 };
1763
1764 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1765         .count = ARRAY_SIZE(rates),
1766         .list = rates,
1767 };
1768
1769 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1770                                 struct snd_pcm_hw_rule *rule)
1771 {
1772         struct snd_pcm_hardware *hw = rule->private;
1773         return snd_interval_list(hw_param_interval(params, rule->var),
1774                                  snd_pcm_known_rates.count,
1775                                  snd_pcm_known_rates.list, hw->rates);
1776 }
1777
1778 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1779                                             struct snd_pcm_hw_rule *rule)
1780 {
1781         struct snd_interval t;
1782         struct snd_pcm_substream *substream = rule->private;
1783         t.min = 0;
1784         t.max = substream->buffer_bytes_max;
1785         t.openmin = 0;
1786         t.openmax = 0;
1787         t.integer = 1;
1788         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1789 }
1790
1791 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1792 {
1793         struct snd_pcm_runtime *runtime = substream->runtime;
1794         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1795         int k, err;
1796
1797         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1798                 snd_mask_any(constrs_mask(constrs, k));
1799         }
1800
1801         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1802                 snd_interval_any(constrs_interval(constrs, k));
1803         }
1804
1805         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1806         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1807         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1808         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1809         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1810
1811         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1812                                    snd_pcm_hw_rule_format, NULL,
1813                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1814         if (err < 0)
1815                 return err;
1816         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1817                                   snd_pcm_hw_rule_sample_bits, NULL,
1818                                   SNDRV_PCM_HW_PARAM_FORMAT,
1819                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1820         if (err < 0)
1821                 return err;
1822         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1823                                   snd_pcm_hw_rule_div, NULL,
1824                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1825         if (err < 0)
1826                 return err;
1827         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1828                                   snd_pcm_hw_rule_mul, NULL,
1829                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1830         if (err < 0)
1831                 return err;
1832         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1833                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1834                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1835         if (err < 0)
1836                 return err;
1837         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1838                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1839                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1840         if (err < 0)
1841                 return err;
1842         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1843                                   snd_pcm_hw_rule_div, NULL,
1844                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1845         if (err < 0)
1846                 return err;
1847         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1848                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1849                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1850         if (err < 0)
1851                 return err;
1852         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1853                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1854                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1855         if (err < 0)
1856                 return err;
1857         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1858                                   snd_pcm_hw_rule_div, NULL,
1859                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1860         if (err < 0)
1861                 return err;
1862         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1863                                   snd_pcm_hw_rule_div, NULL,
1864                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1865         if (err < 0)
1866                 return err;
1867         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1868                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1869                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1870         if (err < 0)
1871                 return err;
1872         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1873                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1874                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1875         if (err < 0)
1876                 return err;
1877         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1878                                   snd_pcm_hw_rule_mul, NULL,
1879                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1880         if (err < 0)
1881                 return err;
1882         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1883                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1884                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1885         if (err < 0)
1886                 return err;
1887         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1888                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1889                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1890         if (err < 0)
1891                 return err;
1892         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1893                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1894                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1895         if (err < 0)
1896                 return err;
1897         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1898                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1899                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1900         if (err < 0)
1901                 return err;
1902         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1903                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1904                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1905         if (err < 0)
1906                 return err;
1907         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1908                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1909                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1910         if (err < 0)
1911                 return err;
1912         return 0;
1913 }
1914
1915 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1916 {
1917         struct snd_pcm_runtime *runtime = substream->runtime;
1918         struct snd_pcm_hardware *hw = &runtime->hw;
1919         int err;
1920         unsigned int mask = 0;
1921
1922         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1923                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1924         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1925                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1926         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1927                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1928                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1929                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1930                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1931                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1932                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1933         }
1934         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1935         snd_assert(err >= 0, return -EINVAL);
1936
1937         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1938         snd_assert(err >= 0, return -EINVAL);
1939
1940         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1941         snd_assert(err >= 0, return -EINVAL);
1942
1943         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1944                                            hw->channels_min, hw->channels_max);
1945         snd_assert(err >= 0, return -EINVAL);
1946
1947         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1948                                            hw->rate_min, hw->rate_max);
1949         snd_assert(err >= 0, return -EINVAL);
1950
1951         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1952                                            hw->period_bytes_min, hw->period_bytes_max);
1953         snd_assert(err >= 0, return -EINVAL);
1954
1955         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1956                                            hw->periods_min, hw->periods_max);
1957         snd_assert(err >= 0, return -EINVAL);
1958
1959         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1960                                            hw->period_bytes_min, hw->buffer_bytes_max);
1961         snd_assert(err >= 0, return -EINVAL);
1962
1963         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1964                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1965                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1966         if (err < 0)
1967                 return err;
1968
1969         /* FIXME: remove */
1970         if (runtime->dma_bytes) {
1971                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1972                 snd_assert(err >= 0, return -EINVAL);
1973         }
1974
1975         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1976                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1977                                           snd_pcm_hw_rule_rate, hw,
1978                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1979                 if (err < 0)
1980                         return err;
1981         }
1982
1983         /* FIXME: this belong to lowlevel */
1984         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1985
1986         return 0;
1987 }
1988
1989 static void pcm_release_private(struct snd_pcm_substream *substream)
1990 {
1991         snd_pcm_unlink(substream);
1992 }
1993
1994 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1995 {
1996         substream->ref_count--;
1997         if (substream->ref_count > 0)
1998                 return;
1999
2000         snd_pcm_drop(substream);
2001         if (substream->hw_opened) {
2002                 if (substream->ops->hw_free != NULL)
2003                         substream->ops->hw_free(substream);
2004                 substream->ops->close(substream);
2005                 substream->hw_opened = 0;
2006         }
2007         if (substream->pcm_release) {
2008                 substream->pcm_release(substream);
2009                 substream->pcm_release = NULL;
2010         }
2011         snd_pcm_detach_substream(substream);
2012 }
2013
2014 EXPORT_SYMBOL(snd_pcm_release_substream);
2015
2016 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2017                            struct file *file,
2018                            struct snd_pcm_substream **rsubstream)
2019 {
2020         struct snd_pcm_substream *substream;
2021         int err;
2022
2023         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2024         if (err < 0)
2025                 return err;
2026         if (substream->ref_count > 1) {
2027                 *rsubstream = substream;
2028                 return 0;
2029         }
2030
2031         err = snd_pcm_hw_constraints_init(substream);
2032         if (err < 0) {
2033                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2034                 goto error;
2035         }
2036
2037         if ((err = substream->ops->open(substream)) < 0)
2038                 goto error;
2039
2040         substream->hw_opened = 1;
2041
2042         err = snd_pcm_hw_constraints_complete(substream);
2043         if (err < 0) {
2044                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2045                 goto error;
2046         }
2047
2048         *rsubstream = substream;
2049         return 0;
2050
2051  error:
2052         snd_pcm_release_substream(substream);
2053         return err;
2054 }
2055
2056 EXPORT_SYMBOL(snd_pcm_open_substream);
2057
2058 static int snd_pcm_open_file(struct file *file,
2059                              struct snd_pcm *pcm,
2060                              int stream,
2061                              struct snd_pcm_file **rpcm_file)
2062 {
2063         struct snd_pcm_file *pcm_file;
2064         struct snd_pcm_substream *substream;
2065         struct snd_pcm_str *str;
2066         int err;
2067
2068         snd_assert(rpcm_file != NULL, return -EINVAL);
2069         *rpcm_file = NULL;
2070
2071         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2072         if (err < 0)
2073                 return err;
2074
2075         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2076         if (pcm_file == NULL) {
2077                 snd_pcm_release_substream(substream);
2078                 return -ENOMEM;
2079         }
2080         pcm_file->substream = substream;
2081         if (substream->ref_count == 1) {
2082                 str = substream->pstr;
2083                 substream->file = pcm_file;
2084                 substream->pcm_release = pcm_release_private;
2085         }
2086         file->private_data = pcm_file;
2087         *rpcm_file = pcm_file;
2088         return 0;
2089 }
2090
2091 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2092 {
2093         struct snd_pcm *pcm;
2094
2095         pcm = snd_lookup_minor_data(iminor(inode),
2096                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2097         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2098 }
2099
2100 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2101 {
2102         struct snd_pcm *pcm;
2103
2104         pcm = snd_lookup_minor_data(iminor(inode),
2105                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2106         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2107 }
2108
2109 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2110 {
2111         int err;
2112         struct snd_pcm_file *pcm_file;
2113         wait_queue_t wait;
2114
2115         if (pcm == NULL) {
2116                 err = -ENODEV;
2117                 goto __error1;
2118         }
2119         err = snd_card_file_add(pcm->card, file);
2120         if (err < 0)
2121                 goto __error1;
2122         if (!try_module_get(pcm->card->module)) {
2123                 err = -EFAULT;
2124                 goto __error2;
2125         }
2126         init_waitqueue_entry(&wait, current);
2127         add_wait_queue(&pcm->open_wait, &wait);
2128         mutex_lock(&pcm->open_mutex);
2129         while (1) {
2130                 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2131                 if (err >= 0)
2132                         break;
2133                 if (err == -EAGAIN) {
2134                         if (file->f_flags & O_NONBLOCK) {
2135                                 err = -EBUSY;
2136                                 break;
2137                         }
2138                 } else
2139                         break;
2140                 set_current_state(TASK_INTERRUPTIBLE);
2141                 mutex_unlock(&pcm->open_mutex);
2142                 schedule();
2143                 mutex_lock(&pcm->open_mutex);
2144                 if (signal_pending(current)) {
2145                         err = -ERESTARTSYS;
2146                         break;
2147                 }
2148         }
2149         remove_wait_queue(&pcm->open_wait, &wait);
2150         mutex_unlock(&pcm->open_mutex);
2151         if (err < 0)
2152                 goto __error;
2153         return err;
2154
2155       __error:
2156         module_put(pcm->card->module);
2157       __error2:
2158         snd_card_file_remove(pcm->card, file);
2159       __error1:
2160         return err;
2161 }
2162
2163 static int snd_pcm_release(struct inode *inode, struct file *file)
2164 {
2165         struct snd_pcm *pcm;
2166         struct snd_pcm_substream *substream;
2167         struct snd_pcm_file *pcm_file;
2168
2169         pcm_file = file->private_data;
2170         substream = pcm_file->substream;
2171         snd_assert(substream != NULL, return -ENXIO);
2172         pcm = substream->pcm;
2173         fasync_helper(-1, file, 0, &substream->runtime->fasync);
2174         mutex_lock(&pcm->open_mutex);
2175         snd_pcm_release_substream(substream);
2176         kfree(pcm_file);
2177         mutex_unlock(&pcm->open_mutex);
2178         wake_up(&pcm->open_wait);
2179         module_put(pcm->card->module);
2180         snd_card_file_remove(pcm->card, file);
2181         return 0;
2182 }
2183
2184 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2185                                                  snd_pcm_uframes_t frames)
2186 {
2187         struct snd_pcm_runtime *runtime = substream->runtime;
2188         snd_pcm_sframes_t appl_ptr;
2189         snd_pcm_sframes_t ret;
2190         snd_pcm_sframes_t hw_avail;
2191
2192         if (frames == 0)
2193                 return 0;
2194
2195         snd_pcm_stream_lock_irq(substream);
2196         switch (runtime->status->state) {
2197         case SNDRV_PCM_STATE_PREPARED:
2198                 break;
2199         case SNDRV_PCM_STATE_DRAINING:
2200         case SNDRV_PCM_STATE_RUNNING:
2201                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2202                         break;
2203                 /* Fall through */
2204         case SNDRV_PCM_STATE_XRUN:
2205                 ret = -EPIPE;
2206                 goto __end;
2207         default:
2208                 ret = -EBADFD;
2209                 goto __end;
2210         }
2211
2212         hw_avail = snd_pcm_playback_hw_avail(runtime);
2213         if (hw_avail <= 0) {
2214                 ret = 0;
2215                 goto __end;
2216         }
2217         if (frames > (snd_pcm_uframes_t)hw_avail)
2218                 frames = hw_avail;
2219         appl_ptr = runtime->control->appl_ptr - frames;
2220         if (appl_ptr < 0)
2221                 appl_ptr += runtime->boundary;
2222         runtime->control->appl_ptr = appl_ptr;
2223         ret = frames;
2224  __end:
2225         snd_pcm_stream_unlock_irq(substream);
2226         return ret;
2227 }
2228
2229 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2230                                                 snd_pcm_uframes_t frames)
2231 {
2232         struct snd_pcm_runtime *runtime = substream->runtime;
2233         snd_pcm_sframes_t appl_ptr;
2234         snd_pcm_sframes_t ret;
2235         snd_pcm_sframes_t hw_avail;
2236
2237         if (frames == 0)
2238                 return 0;
2239
2240         snd_pcm_stream_lock_irq(substream);
2241         switch (runtime->status->state) {
2242         case SNDRV_PCM_STATE_PREPARED:
2243         case SNDRV_PCM_STATE_DRAINING:
2244                 break;
2245         case SNDRV_PCM_STATE_RUNNING:
2246                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2247                         break;
2248                 /* Fall through */
2249         case SNDRV_PCM_STATE_XRUN:
2250                 ret = -EPIPE;
2251                 goto __end;
2252         default:
2253                 ret = -EBADFD;
2254                 goto __end;
2255         }
2256
2257         hw_avail = snd_pcm_capture_hw_avail(runtime);
2258         if (hw_avail <= 0) {
2259                 ret = 0;
2260                 goto __end;
2261         }
2262         if (frames > (snd_pcm_uframes_t)hw_avail)
2263                 frames = hw_avail;
2264         appl_ptr = runtime->control->appl_ptr - frames;
2265         if (appl_ptr < 0)
2266                 appl_ptr += runtime->boundary;
2267         runtime->control->appl_ptr = appl_ptr;
2268         ret = frames;
2269  __end:
2270         snd_pcm_stream_unlock_irq(substream);
2271         return ret;
2272 }
2273
2274 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2275                                                   snd_pcm_uframes_t frames)
2276 {
2277         struct snd_pcm_runtime *runtime = substream->runtime;
2278         snd_pcm_sframes_t appl_ptr;
2279         snd_pcm_sframes_t ret;
2280         snd_pcm_sframes_t avail;
2281
2282         if (frames == 0)
2283                 return 0;
2284
2285         snd_pcm_stream_lock_irq(substream);
2286         switch (runtime->status->state) {
2287         case SNDRV_PCM_STATE_PREPARED:
2288         case SNDRV_PCM_STATE_PAUSED:
2289                 break;
2290         case SNDRV_PCM_STATE_DRAINING:
2291         case SNDRV_PCM_STATE_RUNNING:
2292                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2293                         break;
2294                 /* Fall through */
2295         case SNDRV_PCM_STATE_XRUN:
2296                 ret = -EPIPE;
2297                 goto __end;
2298         default:
2299                 ret = -EBADFD;
2300                 goto __end;
2301         }
2302
2303         avail = snd_pcm_playback_avail(runtime);
2304         if (avail <= 0) {
2305                 ret = 0;
2306                 goto __end;
2307         }
2308         if (frames > (snd_pcm_uframes_t)avail)
2309                 frames = avail;
2310         appl_ptr = runtime->control->appl_ptr + frames;
2311         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2312                 appl_ptr -= runtime->boundary;
2313         runtime->control->appl_ptr = appl_ptr;
2314         ret = frames;
2315  __end:
2316         snd_pcm_stream_unlock_irq(substream);
2317         return ret;
2318 }
2319
2320 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2321                                                  snd_pcm_uframes_t frames)
2322 {
2323         struct snd_pcm_runtime *runtime = substream->runtime;
2324         snd_pcm_sframes_t appl_ptr;
2325         snd_pcm_sframes_t ret;
2326         snd_pcm_sframes_t avail;
2327
2328         if (frames == 0)
2329                 return 0;
2330
2331         snd_pcm_stream_lock_irq(substream);
2332         switch (runtime->status->state) {
2333         case SNDRV_PCM_STATE_PREPARED:
2334         case SNDRV_PCM_STATE_DRAINING:
2335         case SNDRV_PCM_STATE_PAUSED:
2336                 break;
2337         case SNDRV_PCM_STATE_RUNNING:
2338                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2339                         break;
2340                 /* Fall through */
2341         case SNDRV_PCM_STATE_XRUN:
2342                 ret = -EPIPE;
2343                 goto __end;
2344         default:
2345                 ret = -EBADFD;
2346                 goto __end;
2347         }
2348
2349         avail = snd_pcm_capture_avail(runtime);
2350         if (avail <= 0) {
2351                 ret = 0;
2352                 goto __end;
2353         }
2354         if (frames > (snd_pcm_uframes_t)avail)
2355                 frames = avail;
2356         appl_ptr = runtime->control->appl_ptr + frames;
2357         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2358                 appl_ptr -= runtime->boundary;
2359         runtime->control->appl_ptr = appl_ptr;
2360         ret = frames;
2361  __end:
2362         snd_pcm_stream_unlock_irq(substream);
2363         return ret;
2364 }
2365
2366 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2367 {
2368         struct snd_pcm_runtime *runtime = substream->runtime;
2369         int err;
2370
2371         snd_pcm_stream_lock_irq(substream);
2372         switch (runtime->status->state) {
2373         case SNDRV_PCM_STATE_DRAINING:
2374                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2375                         goto __badfd;
2376         case SNDRV_PCM_STATE_RUNNING:
2377                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2378                         break;
2379                 /* Fall through */
2380         case SNDRV_PCM_STATE_PREPARED:
2381         case SNDRV_PCM_STATE_SUSPENDED:
2382                 err = 0;
2383                 break;
2384         case SNDRV_PCM_STATE_XRUN:
2385                 err = -EPIPE;
2386                 break;
2387         default:
2388               __badfd:
2389                 err = -EBADFD;
2390                 break;
2391         }
2392         snd_pcm_stream_unlock_irq(substream);
2393         return err;
2394 }
2395
2396 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2397                          snd_pcm_sframes_t __user *res)
2398 {
2399         struct snd_pcm_runtime *runtime = substream->runtime;
2400         int err;
2401         snd_pcm_sframes_t n = 0;
2402
2403         snd_pcm_stream_lock_irq(substream);
2404         switch (runtime->status->state) {
2405         case SNDRV_PCM_STATE_DRAINING:
2406                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2407                         goto __badfd;
2408         case SNDRV_PCM_STATE_RUNNING:
2409                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2410                         break;
2411                 /* Fall through */
2412         case SNDRV_PCM_STATE_PREPARED:
2413         case SNDRV_PCM_STATE_SUSPENDED:
2414                 err = 0;
2415                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2416                         n = snd_pcm_playback_hw_avail(runtime);
2417                 else
2418                         n = snd_pcm_capture_avail(runtime);
2419                 break;
2420         case SNDRV_PCM_STATE_XRUN:
2421                 err = -EPIPE;
2422                 break;
2423         default:
2424               __badfd:
2425                 err = -EBADFD;
2426                 break;
2427         }
2428         snd_pcm_stream_unlock_irq(substream);
2429         if (!err)
2430                 if (put_user(n, res))
2431                         err = -EFAULT;
2432         return err;
2433 }
2434
2435 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2436                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2437 {
2438         struct snd_pcm_runtime *runtime = substream->runtime;
2439         struct snd_pcm_sync_ptr sync_ptr;
2440         volatile struct snd_pcm_mmap_status *status;
2441         volatile struct snd_pcm_mmap_control *control;
2442         int err;
2443
2444         memset(&sync_ptr, 0, sizeof(sync_ptr));
2445         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2446                 return -EFAULT;
2447         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2448                 return -EFAULT;
2449         status = runtime->status;
2450         control = runtime->control;
2451         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2452                 err = snd_pcm_hwsync(substream);
2453                 if (err < 0)
2454                         return err;
2455         }
2456         snd_pcm_stream_lock_irq(substream);
2457         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2458                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2459         else
2460                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2461         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2462                 control->avail_min = sync_ptr.c.control.avail_min;
2463         else
2464                 sync_ptr.c.control.avail_min = control->avail_min;
2465         sync_ptr.s.status.state = status->state;
2466         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2467         sync_ptr.s.status.tstamp = status->tstamp;
2468         sync_ptr.s.status.suspended_state = status->suspended_state;
2469         snd_pcm_stream_unlock_irq(substream);
2470         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2471                 return -EFAULT;
2472         return 0;
2473 }
2474
2475 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2476 {
2477         struct snd_pcm_runtime *runtime = substream->runtime;
2478         int arg;
2479
2480         if (get_user(arg, _arg))
2481                 return -EFAULT;
2482         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2483                 return -EINVAL;
2484         runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2485         if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2486                 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2487         return 0;
2488 }
2489
2490 static int snd_pcm_common_ioctl1(struct file *file,
2491                                  struct snd_pcm_substream *substream,
2492                                  unsigned int cmd, void __user *arg)
2493 {
2494         snd_assert(substream != NULL, return -ENXIO);
2495
2496         switch (cmd) {
2497         case SNDRV_PCM_IOCTL_PVERSION:
2498                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2499         case SNDRV_PCM_IOCTL_INFO:
2500                 return snd_pcm_info_user(substream, arg);
2501         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2502                 return 0;
2503         case SNDRV_PCM_IOCTL_TTSTAMP:
2504                 return snd_pcm_tstamp(substream, arg);
2505         case SNDRV_PCM_IOCTL_HW_REFINE:
2506                 return snd_pcm_hw_refine_user(substream, arg);
2507         case SNDRV_PCM_IOCTL_HW_PARAMS:
2508                 return snd_pcm_hw_params_user(substream, arg);
2509         case SNDRV_PCM_IOCTL_HW_FREE:
2510                 return snd_pcm_hw_free(substream);
2511         case SNDRV_PCM_IOCTL_SW_PARAMS:
2512                 return snd_pcm_sw_params_user(substream, arg);
2513         case SNDRV_PCM_IOCTL_STATUS:
2514                 return snd_pcm_status_user(substream, arg);
2515         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2516                 return snd_pcm_channel_info_user(substream, arg);
2517         case SNDRV_PCM_IOCTL_PREPARE:
2518                 return snd_pcm_prepare(substream, file);
2519         case SNDRV_PCM_IOCTL_RESET:
2520                 return snd_pcm_reset(substream);
2521         case SNDRV_PCM_IOCTL_START:
2522                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2523         case SNDRV_PCM_IOCTL_LINK:
2524                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2525         case SNDRV_PCM_IOCTL_UNLINK:
2526                 return snd_pcm_unlink(substream);
2527         case SNDRV_PCM_IOCTL_RESUME:
2528                 return snd_pcm_resume(substream);
2529         case SNDRV_PCM_IOCTL_XRUN:
2530                 return snd_pcm_xrun(substream);
2531         case SNDRV_PCM_IOCTL_HWSYNC:
2532                 return snd_pcm_hwsync(substream);
2533         case SNDRV_PCM_IOCTL_DELAY:
2534                 return snd_pcm_delay(substream, arg);
2535         case SNDRV_PCM_IOCTL_SYNC_PTR:
2536                 return snd_pcm_sync_ptr(substream, arg);
2537 #ifdef CONFIG_SND_SUPPORT_OLD_API
2538         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2539                 return snd_pcm_hw_refine_old_user(substream, arg);
2540         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2541                 return snd_pcm_hw_params_old_user(substream, arg);
2542 #endif
2543         case SNDRV_PCM_IOCTL_DRAIN:
2544                 return snd_pcm_drain(substream);
2545         case SNDRV_PCM_IOCTL_DROP:
2546                 return snd_pcm_drop(substream);
2547         case SNDRV_PCM_IOCTL_PAUSE:
2548         {
2549                 int res;
2550                 snd_pcm_stream_lock_irq(substream);
2551                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2552                 snd_pcm_stream_unlock_irq(substream);
2553                 return res;
2554         }
2555         }
2556         snd_printd("unknown ioctl = 0x%x\n", cmd);
2557         return -ENOTTY;
2558 }
2559
2560 static int snd_pcm_playback_ioctl1(struct file *file,
2561                                    struct snd_pcm_substream *substream,
2562                                    unsigned int cmd, void __user *arg)
2563 {
2564         snd_assert(substream != NULL, return -ENXIO);
2565         snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2566         switch (cmd) {
2567         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2568         {
2569                 struct snd_xferi xferi;
2570                 struct snd_xferi __user *_xferi = arg;
2571                 struct snd_pcm_runtime *runtime = substream->runtime;
2572                 snd_pcm_sframes_t result;
2573                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2574                         return -EBADFD;
2575                 if (put_user(0, &_xferi->result))
2576                         return -EFAULT;
2577                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2578                         return -EFAULT;
2579                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2580                 __put_user(result, &_xferi->result);
2581                 return result < 0 ? result : 0;
2582         }
2583         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2584         {
2585                 struct snd_xfern xfern;
2586                 struct snd_xfern __user *_xfern = arg;
2587                 struct snd_pcm_runtime *runtime = substream->runtime;
2588                 void __user **bufs;
2589                 snd_pcm_sframes_t result;
2590                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2591                         return -EBADFD;
2592                 if (runtime->channels > 128)
2593                         return -EINVAL;
2594                 if (put_user(0, &_xfern->result))
2595                         return -EFAULT;
2596                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2597                         return -EFAULT;
2598                 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2599                 if (bufs == NULL)
2600                         return -ENOMEM;
2601                 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2602                         kfree(bufs);
2603                         return -EFAULT;
2604                 }
2605                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2606                 kfree(bufs);
2607                 __put_user(result, &_xfern->result);
2608                 return result < 0 ? result : 0;
2609         }
2610         case SNDRV_PCM_IOCTL_REWIND:
2611         {
2612                 snd_pcm_uframes_t frames;
2613                 snd_pcm_uframes_t __user *_frames = arg;
2614                 snd_pcm_sframes_t result;
2615                 if (get_user(frames, _frames))
2616                         return -EFAULT;
2617                 if (put_user(0, _frames))
2618                         return -EFAULT;
2619                 result = snd_pcm_playback_rewind(substream, frames);
2620                 __put_user(result, _frames);
2621                 return result < 0 ? result : 0;
2622         }
2623         case SNDRV_PCM_IOCTL_FORWARD:
2624         {
2625                 snd_pcm_uframes_t frames;
2626                 snd_pcm_uframes_t __user *_frames = arg;
2627                 snd_pcm_sframes_t result;
2628                 if (get_user(frames, _frames))
2629                         return -EFAULT;
2630                 if (put_user(0, _frames))
2631                         return -EFAULT;
2632                 result = snd_pcm_playback_forward(substream, frames);
2633                 __put_user(result, _frames);
2634                 return result < 0 ? result : 0;
2635         }
2636         }
2637         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2638 }
2639
2640 static int snd_pcm_capture_ioctl1(struct file *file,
2641                                   struct snd_pcm_substream *substream,
2642                                   unsigned int cmd, void __user *arg)
2643 {
2644         snd_assert(substream != NULL, return -ENXIO);
2645         snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2646         switch (cmd) {
2647         case SNDRV_PCM_IOCTL_READI_FRAMES:
2648         {
2649                 struct snd_xferi xferi;
2650                 struct snd_xferi __user *_xferi = arg;
2651                 struct snd_pcm_runtime *runtime = substream->runtime;
2652                 snd_pcm_sframes_t result;
2653                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2654                         return -EBADFD;
2655                 if (put_user(0, &_xferi->result))
2656                         return -EFAULT;
2657                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2658                         return -EFAULT;
2659                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2660                 __put_user(result, &_xferi->result);
2661                 return result < 0 ? result : 0;
2662         }
2663         case SNDRV_PCM_IOCTL_READN_FRAMES:
2664         {
2665                 struct snd_xfern xfern;
2666                 struct snd_xfern __user *_xfern = arg;
2667                 struct snd_pcm_runtime *runtime = substream->runtime;
2668                 void *bufs;
2669                 snd_pcm_sframes_t result;
2670                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2671                         return -EBADFD;
2672                 if (runtime->channels > 128)
2673                         return -EINVAL;
2674                 if (put_user(0, &_xfern->result))
2675                         return -EFAULT;
2676                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2677                         return -EFAULT;
2678                 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2679                 if (bufs == NULL)
2680                         return -ENOMEM;
2681                 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2682                         kfree(bufs);
2683                         return -EFAULT;
2684                 }
2685                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2686                 kfree(bufs);
2687                 __put_user(result, &_xfern->result);
2688                 return result < 0 ? result : 0;
2689         }
2690         case SNDRV_PCM_IOCTL_REWIND:
2691         {
2692                 snd_pcm_uframes_t frames;
2693                 snd_pcm_uframes_t __user *_frames = arg;
2694                 snd_pcm_sframes_t result;
2695                 if (get_user(frames, _frames))
2696                         return -EFAULT;
2697                 if (put_user(0, _frames))
2698                         return -EFAULT;
2699                 result = snd_pcm_capture_rewind(substream, frames);
2700                 __put_user(result, _frames);
2701                 return result < 0 ? result : 0;
2702         }
2703         case SNDRV_PCM_IOCTL_FORWARD:
2704         {
2705                 snd_pcm_uframes_t frames;
2706                 snd_pcm_uframes_t __user *_frames = arg;
2707                 snd_pcm_sframes_t result;
2708                 if (get_user(frames, _frames))
2709                         return -EFAULT;
2710                 if (put_user(0, _frames))
2711                         return -EFAULT;
2712                 result = snd_pcm_capture_forward(substream, frames);
2713                 __put_user(result, _frames);
2714                 return result < 0 ? result : 0;
2715         }
2716         }
2717         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2718 }
2719
2720 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2721                                    unsigned long arg)
2722 {
2723         struct snd_pcm_file *pcm_file;
2724
2725         pcm_file = file->private_data;
2726
2727         if (((cmd >> 8) & 0xff) != 'A')
2728                 return -ENOTTY;
2729
2730         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2731                                        (void __user *)arg);
2732 }
2733
2734 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2735                                   unsigned long arg)
2736 {
2737         struct snd_pcm_file *pcm_file;
2738
2739         pcm_file = file->private_data;
2740
2741         if (((cmd >> 8) & 0xff) != 'A')
2742                 return -ENOTTY;
2743
2744         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2745                                       (void __user *)arg);
2746 }
2747
2748 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2749                          unsigned int cmd, void *arg)
2750 {
2751         mm_segment_t fs;
2752         int result;
2753
2754         fs = snd_enter_user();
2755         switch (substream->stream) {
2756         case SNDRV_PCM_STREAM_PLAYBACK:
2757                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2758                                                  (void __user *)arg);
2759                 break;
2760         case SNDRV_PCM_STREAM_CAPTURE:
2761                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2762                                                 (void __user *)arg);
2763                 break;
2764         default:
2765                 result = -EINVAL;
2766                 break;
2767         }
2768         snd_leave_user(fs);
2769         return result;
2770 }
2771
2772 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2773
2774 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2775                             loff_t * offset)
2776 {
2777         struct snd_pcm_file *pcm_file;
2778         struct snd_pcm_substream *substream;
2779         struct snd_pcm_runtime *runtime;
2780         snd_pcm_sframes_t result;
2781
2782         pcm_file = file->private_data;
2783         substream = pcm_file->substream;
2784         snd_assert(substream != NULL, return -ENXIO);
2785         runtime = substream->runtime;
2786         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2787                 return -EBADFD;
2788         if (!frame_aligned(runtime, count))
2789                 return -EINVAL;
2790         count = bytes_to_frames(runtime, count);
2791         result = snd_pcm_lib_read(substream, buf, count);
2792         if (result > 0)
2793                 result = frames_to_bytes(runtime, result);
2794         return result;
2795 }
2796
2797 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2798                              size_t count, loff_t * offset)
2799 {
2800         struct snd_pcm_file *pcm_file;
2801         struct snd_pcm_substream *substream;
2802         struct snd_pcm_runtime *runtime;
2803         snd_pcm_sframes_t result;
2804
2805         pcm_file = file->private_data;
2806         substream = pcm_file->substream;
2807         snd_assert(substream != NULL, result = -ENXIO; goto end);
2808         runtime = substream->runtime;
2809         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2810                 result = -EBADFD;
2811                 goto end;
2812         }
2813         if (!frame_aligned(runtime, count)) {
2814                 result = -EINVAL;
2815                 goto end;
2816         }
2817         count = bytes_to_frames(runtime, count);
2818         result = snd_pcm_lib_write(substream, buf, count);
2819         if (result > 0)
2820                 result = frames_to_bytes(runtime, result);
2821  end:
2822         return result;
2823 }
2824
2825 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2826                              unsigned long nr_segs, loff_t pos)
2827
2828 {
2829         struct snd_pcm_file *pcm_file;
2830         struct snd_pcm_substream *substream;
2831         struct snd_pcm_runtime *runtime;
2832         snd_pcm_sframes_t result;
2833         unsigned long i;
2834         void __user **bufs;
2835         snd_pcm_uframes_t frames;
2836
2837         pcm_file = iocb->ki_filp->private_data;
2838         substream = pcm_file->substream;
2839         snd_assert(substream != NULL, return -ENXIO);
2840         runtime = substream->runtime;
2841         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2842                 return -EBADFD;
2843         if (nr_segs > 1024 || nr_segs != runtime->channels)
2844                 return -EINVAL;
2845         if (!frame_aligned(runtime, iov->iov_len))
2846                 return -EINVAL;
2847         frames = bytes_to_samples(runtime, iov->iov_len);
2848         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2849         if (bufs == NULL)
2850                 return -ENOMEM;
2851         for (i = 0; i < nr_segs; ++i)
2852                 bufs[i] = iov[i].iov_base;
2853         result = snd_pcm_lib_readv(substream, bufs, frames);
2854         if (result > 0)
2855                 result = frames_to_bytes(runtime, result);
2856         kfree(bufs);
2857         return result;
2858 }
2859
2860 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2861                               unsigned long nr_segs, loff_t pos)
2862 {
2863         struct snd_pcm_file *pcm_file;
2864         struct snd_pcm_substream *substream;
2865         struct snd_pcm_runtime *runtime;
2866         snd_pcm_sframes_t result;
2867         unsigned long i;
2868         void __user **bufs;
2869         snd_pcm_uframes_t frames;
2870
2871         pcm_file = iocb->ki_filp->private_data;
2872         substream = pcm_file->substream;
2873         snd_assert(substream != NULL, result = -ENXIO; goto end);
2874         runtime = substream->runtime;
2875         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2876                 result = -EBADFD;
2877                 goto end;
2878         }
2879         if (nr_segs > 128 || nr_segs != runtime->channels ||
2880             !frame_aligned(runtime, iov->iov_len)) {
2881                 result = -EINVAL;
2882                 goto end;
2883         }
2884         frames = bytes_to_samples(runtime, iov->iov_len);
2885         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2886         if (bufs == NULL)
2887                 return -ENOMEM;
2888         for (i = 0; i < nr_segs; ++i)
2889                 bufs[i] = iov[i].iov_base;
2890         result = snd_pcm_lib_writev(substream, bufs, frames);
2891         if (result > 0)
2892                 result = frames_to_bytes(runtime, result);
2893         kfree(bufs);
2894  end:
2895         return result;
2896 }
2897
2898 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2899 {
2900         struct snd_pcm_file *pcm_file;
2901         struct snd_pcm_substream *substream;
2902         struct snd_pcm_runtime *runtime;
2903         unsigned int mask;
2904         snd_pcm_uframes_t avail;
2905
2906         pcm_file = file->private_data;
2907
2908         substream = pcm_file->substream;
2909         snd_assert(substream != NULL, return -ENXIO);
2910         runtime = substream->runtime;
2911
2912         poll_wait(file, &runtime->sleep, wait);
2913
2914         snd_pcm_stream_lock_irq(substream);
2915         avail = snd_pcm_playback_avail(runtime);
2916         switch (runtime->status->state) {
2917         case SNDRV_PCM_STATE_RUNNING:
2918         case SNDRV_PCM_STATE_PREPARED:
2919         case SNDRV_PCM_STATE_PAUSED:
2920                 if (avail >= runtime->control->avail_min) {
2921                         mask = POLLOUT | POLLWRNORM;
2922                         break;
2923                 }
2924                 /* Fall through */
2925         case SNDRV_PCM_STATE_DRAINING:
2926                 mask = 0;
2927                 break;
2928         default:
2929                 mask = POLLOUT | POLLWRNORM | POLLERR;
2930                 break;
2931         }
2932         snd_pcm_stream_unlock_irq(substream);
2933         return mask;
2934 }
2935
2936 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2937 {
2938         struct snd_pcm_file *pcm_file;
2939         struct snd_pcm_substream *substream;
2940         struct snd_pcm_runtime *runtime;
2941         unsigned int mask;
2942         snd_pcm_uframes_t avail;
2943
2944         pcm_file = file->private_data;
2945
2946         substream = pcm_file->substream;
2947         snd_assert(substream != NULL, return -ENXIO);
2948         runtime = substream->runtime;
2949
2950         poll_wait(file, &runtime->sleep, wait);
2951
2952         snd_pcm_stream_lock_irq(substream);
2953         avail = snd_pcm_capture_avail(runtime);
2954         switch (runtime->status->state) {
2955         case SNDRV_PCM_STATE_RUNNING:
2956         case SNDRV_PCM_STATE_PREPARED:
2957         case SNDRV_PCM_STATE_PAUSED:
2958                 if (avail >= runtime->control->avail_min) {
2959                         mask = POLLIN | POLLRDNORM;
2960                         break;
2961                 }
2962                 mask = 0;
2963                 break;
2964         case SNDRV_PCM_STATE_DRAINING:
2965                 if (avail > 0) {
2966                         mask = POLLIN | POLLRDNORM;
2967                         break;
2968                 }
2969                 /* Fall through */
2970         default:
2971                 mask = POLLIN | POLLRDNORM | POLLERR;
2972                 break;
2973         }
2974         snd_pcm_stream_unlock_irq(substream);
2975         return mask;
2976 }
2977
2978 /*
2979  * mmap support
2980  */
2981
2982 /*
2983  * Only on coherent architectures, we can mmap the status and the control records
2984  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
2985  */
2986 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2987 /*
2988  * mmap status record
2989  */
2990 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2991                                                 struct vm_fault *vmf)
2992 {
2993         struct snd_pcm_substream *substream = area->vm_private_data;
2994         struct snd_pcm_runtime *runtime;
2995
2996         if (substream == NULL)
2997                 return VM_FAULT_SIGBUS;
2998         runtime = substream->runtime;
2999         vmf->page = virt_to_page(runtime->status);
3000         get_page(vmf->page);
3001         return 0;
3002 }
3003
3004 static struct vm_operations_struct snd_pcm_vm_ops_status =
3005 {
3006         .fault =        snd_pcm_mmap_status_fault,
3007 };
3008
3009 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3010                                struct vm_area_struct *area)
3011 {
3012         struct snd_pcm_runtime *runtime;
3013         long size;
3014         if (!(area->vm_flags & VM_READ))
3015                 return -EINVAL;
3016         runtime = substream->runtime;
3017         snd_assert(runtime != NULL, return -EAGAIN);
3018         size = area->vm_end - area->vm_start;
3019         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3020                 return -EINVAL;
3021         area->vm_ops = &snd_pcm_vm_ops_status;
3022         area->vm_private_data = substream;
3023         area->vm_flags |= VM_RESERVED;
3024         return 0;
3025 }
3026
3027 /*
3028  * mmap control record
3029  */
3030 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3031                                                 struct vm_fault *vmf)
3032 {
3033         struct snd_pcm_substream *substream = area->vm_private_data;
3034         struct snd_pcm_runtime *runtime;
3035
3036         if (substream == NULL)
3037                 return VM_FAULT_SIGBUS;
3038         runtime = substream->runtime;
3039         vmf->page = virt_to_page(runtime->control);
3040         get_page(vmf->page);
3041         return 0;
3042 }
3043
3044 static struct vm_operations_struct snd_pcm_vm_ops_control =
3045 {
3046         .fault =        snd_pcm_mmap_control_fault,
3047 };
3048
3049 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3050                                 struct vm_area_struct *area)
3051 {
3052         struct snd_pcm_runtime *runtime;
3053         long size;
3054         if (!(area->vm_flags & VM_READ))
3055                 return -EINVAL;
3056         runtime = substream->runtime;
3057         snd_assert(runtime != NULL, return -EAGAIN);
3058         size = area->vm_end - area->vm_start;
3059         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3060                 return -EINVAL;
3061         area->vm_ops = &snd_pcm_vm_ops_control;
3062         area->vm_private_data = substream;
3063         area->vm_flags |= VM_RESERVED;
3064         return 0;
3065 }
3066 #else /* ! coherent mmap */
3067 /*
3068  * don't support mmap for status and control records.
3069  */
3070 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3071                                struct vm_area_struct *area)
3072 {
3073         return -ENXIO;
3074 }
3075 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3076                                 struct vm_area_struct *area)
3077 {
3078         return -ENXIO;
3079 }
3080 #endif /* coherent mmap */
3081
3082 /*
3083  * fault callback for mmapping a RAM page
3084  */
3085 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3086                                                 struct vm_fault *vmf)
3087 {
3088         struct snd_pcm_substream *substream = area->vm_private_data;
3089         struct snd_pcm_runtime *runtime;
3090         unsigned long offset;
3091         struct page * page;
3092         void *vaddr;
3093         size_t dma_bytes;
3094
3095         if (substream == NULL)
3096                 return VM_FAULT_SIGBUS;
3097         runtime = substream->runtime;
3098         offset = vmf->pgoff << PAGE_SHIFT;
3099         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3100         if (offset > dma_bytes - PAGE_SIZE)
3101                 return VM_FAULT_SIGBUS;
3102         if (substream->ops->page) {
3103                 page = substream->ops->page(substream, offset);
3104                 if (!page)
3105                         return VM_FAULT_SIGBUS;
3106         } else {
3107                 vaddr = runtime->dma_area + offset;
3108                 page = virt_to_page(vaddr);
3109         }
3110         get_page(page);
3111         vmf->page = page;
3112         return 0;
3113 }
3114
3115 static struct vm_operations_struct snd_pcm_vm_ops_data =
3116 {
3117         .open =         snd_pcm_mmap_data_open,
3118         .close =        snd_pcm_mmap_data_close,
3119         .fault =        snd_pcm_mmap_data_fault,
3120 };
3121
3122 /*
3123  * mmap the DMA buffer on RAM
3124  */
3125 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3126                                 struct vm_area_struct *area)
3127 {
3128         area->vm_ops = &snd_pcm_vm_ops_data;
3129         area->vm_private_data = substream;
3130         area->vm_flags |= VM_RESERVED;
3131         atomic_inc(&substream->mmap_count);
3132         return 0;
3133 }
3134
3135 /*
3136  * mmap the DMA buffer on I/O memory area
3137  */
3138 #if SNDRV_PCM_INFO_MMAP_IOMEM
3139 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3140 {
3141         .open =         snd_pcm_mmap_data_open,
3142         .close =        snd_pcm_mmap_data_close,
3143 };
3144
3145 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3146                            struct vm_area_struct *area)
3147 {
3148         long size;
3149         unsigned long offset;
3150
3151 #ifdef pgprot_noncached
3152         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3153 #endif
3154         area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3155         area->vm_private_data = substream;
3156         area->vm_flags |= VM_IO;
3157         size = area->vm_end - area->vm_start;
3158         offset = area->vm_pgoff << PAGE_SHIFT;
3159         if (io_remap_pfn_range(area, area->vm_start,
3160                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3161                                 size, area->vm_page_prot))
3162                 return -EAGAIN;
3163         atomic_inc(&substream->mmap_count);
3164         return 0;
3165 }
3166
3167 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3168 #endif /* SNDRV_PCM_INFO_MMAP */
3169
3170 /*
3171  * mmap DMA buffer
3172  */
3173 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3174                       struct vm_area_struct *area)
3175 {
3176         struct snd_pcm_runtime *runtime;
3177         long size;
3178         unsigned long offset;
3179         size_t dma_bytes;
3180
3181         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3182                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3183                         return -EINVAL;
3184         } else {
3185                 if (!(area->vm_flags & VM_READ))
3186                         return -EINVAL;
3187         }
3188         runtime = substream->runtime;
3189         snd_assert(runtime != NULL, return -EAGAIN);
3190         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3191                 return -EBADFD;
3192         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3193                 return -ENXIO;
3194         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3195             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3196                 return -EINVAL;
3197         size = area->vm_end - area->vm_start;
3198         offset = area->vm_pgoff << PAGE_SHIFT;
3199         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3200         if ((size_t)size > dma_bytes)
3201                 return -EINVAL;
3202         if (offset > dma_bytes - size)
3203                 return -EINVAL;
3204
3205         if (substream->ops->mmap)
3206                 return substream->ops->mmap(substream, area);
3207         else
3208                 return snd_pcm_default_mmap(substream, area);
3209 }
3210
3211 EXPORT_SYMBOL(snd_pcm_mmap_data);
3212
3213 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3214 {
3215         struct snd_pcm_file * pcm_file;
3216         struct snd_pcm_substream *substream;
3217         unsigned long offset;
3218
3219         pcm_file = file->private_data;
3220         substream = pcm_file->substream;
3221         snd_assert(substream != NULL, return -ENXIO);
3222
3223         offset = area->vm_pgoff << PAGE_SHIFT;
3224         switch (offset) {
3225         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3226                 if (pcm_file->no_compat_mmap)
3227                         return -ENXIO;
3228                 return snd_pcm_mmap_status(substream, file, area);
3229         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3230                 if (pcm_file->no_compat_mmap)
3231                         return -ENXIO;
3232                 return snd_pcm_mmap_control(substream, file, area);
3233         default:
3234                 return snd_pcm_mmap_data(substream, file, area);
3235         }
3236         return 0;
3237 }
3238
3239 static int snd_pcm_fasync(int fd, struct file * file, int on)
3240 {
3241         struct snd_pcm_file * pcm_file;
3242         struct snd_pcm_substream *substream;
3243         struct snd_pcm_runtime *runtime;
3244         int err;
3245
3246         pcm_file = file->private_data;
3247         substream = pcm_file->substream;
3248         snd_assert(substream != NULL, return -ENXIO);
3249         runtime = substream->runtime;
3250
3251         err = fasync_helper(fd, file, on, &runtime->fasync);
3252         if (err < 0)
3253                 return err;
3254         return 0;
3255 }
3256
3257 /*
3258  * ioctl32 compat
3259  */
3260 #ifdef CONFIG_COMPAT
3261 #include "pcm_compat.c"
3262 #else
3263 #define snd_pcm_ioctl_compat    NULL
3264 #endif
3265
3266 /*
3267  *  To be removed helpers to keep binary compatibility
3268  */
3269
3270 #ifdef CONFIG_SND_SUPPORT_OLD_API
3271 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3272 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3273
3274 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3275                                                struct snd_pcm_hw_params_old *oparams)
3276 {
3277         unsigned int i;
3278
3279         memset(params, 0, sizeof(*params));
3280         params->flags = oparams->flags;
3281         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3282                 params->masks[i].bits[0] = oparams->masks[i];
3283         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3284         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3285         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3286         params->info = oparams->info;
3287         params->msbits = oparams->msbits;
3288         params->rate_num = oparams->rate_num;
3289         params->rate_den = oparams->rate_den;
3290         params->fifo_size = oparams->fifo_size;
3291 }
3292
3293 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3294                                              struct snd_pcm_hw_params *params)
3295 {
3296         unsigned int i;
3297
3298         memset(oparams, 0, sizeof(*oparams));
3299         oparams->flags = params->flags;
3300         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3301                 oparams->masks[i] = params->masks[i].bits[0];
3302         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3303         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3304         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3305         oparams->info = params->info;
3306         oparams->msbits = params->msbits;
3307         oparams->rate_num = params->rate_num;
3308         oparams->rate_den = params->rate_den;
3309         oparams->fifo_size = params->fifo_size;
3310 }
3311
3312 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3313                                       struct snd_pcm_hw_params_old __user * _oparams)
3314 {
3315         struct snd_pcm_hw_params *params;
3316         struct snd_pcm_hw_params_old *oparams = NULL;
3317         int err;
3318
3319         params = kmalloc(sizeof(*params), GFP_KERNEL);
3320         if (!params) {
3321                 err = -ENOMEM;
3322                 goto out;
3323         }
3324         oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3325         if (!oparams) {
3326                 err = -ENOMEM;
3327                 goto out;
3328         }
3329
3330         if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3331                 err = -EFAULT;
3332                 goto out;
3333         }
3334         snd_pcm_hw_convert_from_old_params(params, oparams);
3335         err = snd_pcm_hw_refine(substream, params);
3336         snd_pcm_hw_convert_to_old_params(oparams, params);
3337         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3338                 if (!err)
3339                         err = -EFAULT;
3340         }
3341 out:
3342         kfree(params);
3343         kfree(oparams);
3344         return err;
3345 }
3346
3347 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3348                                       struct snd_pcm_hw_params_old __user * _oparams)
3349 {
3350         struct snd_pcm_hw_params *params;
3351         struct snd_pcm_hw_params_old *oparams = NULL;
3352         int err;
3353
3354         params = kmalloc(sizeof(*params), GFP_KERNEL);
3355         if (!params) {
3356                 err = -ENOMEM;
3357                 goto out;
3358         }
3359         oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3360         if (!oparams) {
3361                 err = -ENOMEM;
3362                 goto out;
3363         }
3364         if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3365                 err = -EFAULT;
3366                 goto out;
3367         }
3368         snd_pcm_hw_convert_from_old_params(params, oparams);
3369         err = snd_pcm_hw_params(substream, params);
3370         snd_pcm_hw_convert_to_old_params(oparams, params);
3371         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3372                 if (!err)
3373                         err = -EFAULT;
3374         }
3375 out:
3376         kfree(params);
3377         kfree(oparams);
3378         return err;
3379 }
3380 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3381
3382 /*
3383  *  Register section
3384  */
3385
3386 const struct file_operations snd_pcm_f_ops[2] = {
3387         {
3388                 .owner =                THIS_MODULE,
3389                 .write =                snd_pcm_write,
3390                 .aio_write =            snd_pcm_aio_write,
3391                 .open =                 snd_pcm_playback_open,
3392                 .release =              snd_pcm_release,
3393                 .poll =                 snd_pcm_playback_poll,
3394                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3395                 .compat_ioctl =         snd_pcm_ioctl_compat,
3396                 .mmap =                 snd_pcm_mmap,
3397                 .fasync =               snd_pcm_fasync,
3398         },
3399         {
3400                 .owner =                THIS_MODULE,
3401                 .read =                 snd_pcm_read,
3402                 .aio_read =             snd_pcm_aio_read,
3403                 .open =                 snd_pcm_capture_open,
3404                 .release =              snd_pcm_release,
3405                 .poll =                 snd_pcm_capture_poll,
3406                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3407                 .compat_ioctl =         snd_pcm_ioctl_compat,
3408                 .mmap =                 snd_pcm_mmap,
3409                 .fasync =               snd_pcm_fasync,
3410         }
3411 };