sound/core/pcm_native.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer
   3  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include <sound/driver.h>
  23 #include <linux/mm.h>
  24 #include <linux/smp_lock.h>
  25 #include <linux/file.h>
  26 #include <linux/slab.h>
  27 #include <linux/time.h>
  28 #include <linux/uio.h>
  29 #include <sound/core.h>
  30 #include <sound/control.h>
  31 #include <sound/info.h>
  32 #include <sound/pcm.h>
  33 #include <sound/pcm_params.h>
  34 #include <sound/timer.h>
  35 #include <sound/minors.h>
  36 #include <asm/io.h>
  37
  38 /*
  39  *  Compatibility
  40  */
  41
  42 struct snd_pcm_hw_params_old {
  43         unsigned int flags;
  44         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
  45                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
  46         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
  47                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
  48         unsigned int rmask;
  49         unsigned int cmask;
  50         unsigned int info;
  51         unsigned int msbits;
  52         unsigned int rate_num;
  53         unsigned int rate_den;
  54         snd_pcm_uframes_t fifo_size;
  55         unsigned char reserved[64];
  56 };
  57
  58 #ifdef CONFIG_SND_SUPPORT_OLD_API
  59 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
  60 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
  61
  62 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
  63                                       struct snd_pcm_hw_params_old __user * _oparams);
  64 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
  65                                       struct snd_pcm_hw_params_old __user * _oparams);
  66 #endif
  67 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
  68
  69 /*
  70  *
  71  */
  72
  73 DEFINE_RWLOCK(snd_pcm_link_rwlock);
  74 EXPORT_SYMBOL(snd_pcm_link_rwlock);
  75
  76 static DECLARE_RWSEM(snd_pcm_link_rwsem);
  77
  78 static inline mm_segment_t snd_enter_user(void)
  79 {
  80         mm_segment_t fs = get_fs();
  81         set_fs(get_ds());
  82         return fs;
  83 }
  84
  85 static inline void snd_leave_user(mm_segment_t fs)
  86 {
  87         set_fs(fs);
  88 }
  89
  90
  91
  92 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
  93 {
  94         struct snd_pcm_runtime *runtime;
  95         struct snd_pcm *pcm = substream->pcm;
  96         struct snd_pcm_str *pstr = substream->pstr;
  97
  98         snd_assert(substream != NULL, return -ENXIO);
  99         memset(info, 0, sizeof(*info));
 100         info->card = pcm->card->number;
 101         info->device = pcm->device;
 102         info->stream = substream->stream;
 103         info->subdevice = substream->number;
 104         strlcpy(info->id, pcm->id, sizeof(info->id));
 105         strlcpy(info->name, pcm->name, sizeof(info->name));
 106         info->dev_class = pcm->dev_class;
 107         info->dev_subclass = pcm->dev_subclass;
 108         info->subdevices_count = pstr->substream_count;
 109         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 110         strlcpy(info->subname, substream->name, sizeof(info->subname));
 111         runtime = substream->runtime;
 112         /* AB: FIXME!!! This is definitely nonsense */
 113         if (runtime) {
 114                 info->sync = runtime->sync;
 115                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
 116         }
 117         return 0;
 118 }
 119
 120 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 121                       struct snd_pcm_info __user * _info)
 122 {
 123         struct snd_pcm_info *info;
 124         int err;
 125
 126         info = kmalloc(sizeof(*info), GFP_KERNEL);
 127         if (! info)
 128                 return -ENOMEM;
 129         err = snd_pcm_info(substream, info);
 130         if (err >= 0) {
 131                 if (copy_to_user(_info, info, sizeof(*info)))
 132                         err = -EFAULT;
 133         }
 134         kfree(info);
 135         return err;
 136 }
 137
 138 #undef RULES_DEBUG
 139
 140 #ifdef RULES_DEBUG
 141 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
 142 char *snd_pcm_hw_param_names[] = {
 143         HW_PARAM(ACCESS),
 144         HW_PARAM(FORMAT),
 145         HW_PARAM(SUBFORMAT),
 146         HW_PARAM(SAMPLE_BITS),
 147         HW_PARAM(FRAME_BITS),
 148         HW_PARAM(CHANNELS),
 149         HW_PARAM(RATE),
 150         HW_PARAM(PERIOD_TIME),
 151         HW_PARAM(PERIOD_SIZE),
 152         HW_PARAM(PERIOD_BYTES),
 153         HW_PARAM(PERIODS),
 154         HW_PARAM(BUFFER_TIME),
 155         HW_PARAM(BUFFER_SIZE),
 156         HW_PARAM(BUFFER_BYTES),
 157         HW_PARAM(TICK_TIME),
 158 };
 159 #endif
 160
 161 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
 162                       struct snd_pcm_hw_params *params)
 163 {
 164         unsigned int k;
 165         struct snd_pcm_hardware *hw;
 166         struct snd_interval *i = NULL;
 167         struct snd_mask *m = NULL;
 168         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
 169         unsigned int rstamps[constrs->rules_num];
 170         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 171         unsigned int stamp = 2;
 172         int changed, again;
 173
 174         params->info = 0;
 175         params->fifo_size = 0;
 176         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
 177                 params->msbits = 0;
 178         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
 179                 params->rate_num = 0;
 180                 params->rate_den = 0;
 181         }
 182
 183         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
 184                 m = hw_param_mask(params, k);
 185                 if (snd_mask_empty(m))
 186                         return -EINVAL;
 187                 if (!(params->rmask & (1 << k)))
 188                         continue;
 189 #ifdef RULES_DEBUG
 190                 printk("%s = ", snd_pcm_hw_param_names[k]);
 191                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 192 #endif
 193                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
 194 #ifdef RULES_DEBUG
 195                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 196 #endif
 197                 if (changed)
 198                         params->cmask |= 1 << k;
 199                 if (changed < 0)
 200                         return changed;
 201         }
 202
 203         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
 204                 i = hw_param_interval(params, k);
 205                 if (snd_interval_empty(i))
 206                         return -EINVAL;
 207                 if (!(params->rmask & (1 << k)))
 208                         continue;
 209 #ifdef RULES_DEBUG
 210                 printk("%s = ", snd_pcm_hw_param_names[k]);
 211                 if (i->empty)
 212                         printk("empty");
 213                 else
 214                         printk("%c%u %u%c",
 215                                i->openmin ? '(' : '[', i->min,
 216                                i->max, i->openmax ? ')' : ']');
 217                 printk(" -> ");
 218 #endif
 219                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
 220 #ifdef RULES_DEBUG
 221                 if (i->empty)
 222                         printk("empty\n");
 223                 else
 224                         printk("%c%u %u%c\n",
 225                                i->openmin ? '(' : '[', i->min,
 226                                i->max, i->openmax ? ')' : ']');
 227 #endif
 228                 if (changed)
 229                         params->cmask |= 1 << k;
 230                 if (changed < 0)
 231                         return changed;
 232         }
 233
 234         for (k = 0; k < constrs->rules_num; k++)
 235                 rstamps[k] = 0;
 236         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
 237                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
 238         do {
 239                 again = 0;
 240                 for (k = 0; k < constrs->rules_num; k++) {
 241                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
 242                         unsigned int d;
 243                         int doit = 0;
 244                         if (r->cond && !(r->cond & params->flags))
 245                                 continue;
 246                         for (d = 0; r->deps[d] >= 0; d++) {
 247                                 if (vstamps[r->deps[d]] > rstamps[k]) {
 248                                         doit = 1;
 249                                         break;
 250                                 }
 251                         }
 252                         if (!doit)
 253                                 continue;
 254 #ifdef RULES_DEBUG
 255                         printk("Rule %d [%p]: ", k, r->func);
 256                         if (r->var >= 0) {
 257                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
 258                                 if (hw_is_mask(r->var)) {
 259                                         m = hw_param_mask(params, r->var);
 260                                         printk("%x", *m->bits);
 261                                 } else {
 262                                         i = hw_param_interval(params, r->var);
 263                                         if (i->empty)
 264                                                 printk("empty");
 265                                         else
 266                                                 printk("%c%u %u%c",
 267                                                        i->openmin ? '(' : '[', i->min,
 268                                                        i->max, i->openmax ? ')' : ']');
 269                                 }
 270                         }
 271 #endif
 272                         changed = r->func(params, r);
 273 #ifdef RULES_DEBUG
 274                         if (r->var >= 0) {
 275                                 printk(" -> ");
 276                                 if (hw_is_mask(r->var))
 277                                         printk("%x", *m->bits);
 278                                 else {
 279                                         if (i->empty)
 280                                                 printk("empty");
 281                                         else
 282                                                 printk("%c%u %u%c",
 283                                                        i->openmin ? '(' : '[', i->min,
 284                                                        i->max, i->openmax ? ')' : ']');
 285                                 }
 286                         }
 287                         printk("\n");
 288 #endif
 289                         rstamps[k] = stamp;
 290                         if (changed && r->var >= 0) {
 291                                 params->cmask |= (1 << r->var);
 292                                 vstamps[r->var] = stamp;
 293                                 again = 1;
 294                         }
 295                         if (changed < 0)
 296                                 return changed;
 297                         stamp++;
 298                 }
 299         } while (again);
 300         if (!params->msbits) {
 301                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
 302                 if (snd_interval_single(i))
 303                         params->msbits = snd_interval_value(i);
 304         }
 305
 306         if (!params->rate_den) {
 307                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 308                 if (snd_interval_single(i)) {
 309                         params->rate_num = snd_interval_value(i);
 310                         params->rate_den = 1;
 311                 }
 312         }
 313
 314         hw = &substream->runtime->hw;
 315         if (!params->info)
 316                 params->info = hw->info;
 317         if (!params->fifo_size)
 318                 params->fifo_size = hw->fifo_size;
 319         params->rmask = 0;
 320         return 0;
 321 }
 322
 323 EXPORT_SYMBOL(snd_pcm_hw_refine);
 324
 325 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 326                                   struct snd_pcm_hw_params __user * _params)
 327 {
 328         struct snd_pcm_hw_params *params;
 329         int err;
 330
 331         params = kmalloc(sizeof(*params), GFP_KERNEL);
 332         if (!params) {
 333                 err = -ENOMEM;
 334                 goto out;
 335         }
 336         if (copy_from_user(params, _params, sizeof(*params))) {
 337                 err = -EFAULT;
 338                 goto out;
 339         }
 340         err = snd_pcm_hw_refine(substream, params);
 341         if (copy_to_user(_params, params, sizeof(*params))) {
 342                 if (!err)
 343                         err = -EFAULT;
 344         }
 345 out:
 346         kfree(params);
 347         return err;
 348 }
 349
 350 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 351                              struct snd_pcm_hw_params *params)
 352 {
 353         struct snd_pcm_runtime *runtime;
 354         int err;
 355         unsigned int bits;
 356         snd_pcm_uframes_t frames;
 357
 358         snd_assert(substream != NULL, return -ENXIO);
 359         runtime = substream->runtime;
 360         snd_assert(runtime != NULL, return -ENXIO);
 361         snd_pcm_stream_lock_irq(substream);
 362         switch (runtime->status->state) {
 363         case SNDRV_PCM_STATE_OPEN:
 364         case SNDRV_PCM_STATE_SETUP:
 365         case SNDRV_PCM_STATE_PREPARED:
 366                 break;
 367         default:
 368                 snd_pcm_stream_unlock_irq(substream);
 369                 return -EBADFD;
 370         }
 371         snd_pcm_stream_unlock_irq(substream);
 372 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 373         if (!substream->oss.oss)
 374 #endif
 375                 if (atomic_read(&runtime->mmap_count))
 376                         return -EBADFD;
 377
 378         params->rmask = ~0U;
 379         err = snd_pcm_hw_refine(substream, params);
 380         if (err < 0)
 381                 goto _error;
 382
 383         err = snd_pcm_hw_params_choose(substream, params);
 384         if (err < 0)
 385                 goto _error;
 386
 387         if (substream->ops->hw_params != NULL) {
 388                 err = substream->ops->hw_params(substream, params);
 389                 if (err < 0)
 390                         goto _error;
 391         }
 392
 393         runtime->access = params_access(params);
 394         runtime->format = params_format(params);
 395         runtime->subformat = params_subformat(params);
 396         runtime->channels = params_channels(params);
 397         runtime->rate = params_rate(params);
 398         runtime->period_size = params_period_size(params);
 399         runtime->periods = params_periods(params);
 400         runtime->buffer_size = params_buffer_size(params);
 401         runtime->tick_time = params_tick_time(params);
 402         runtime->info = params->info;
 403         runtime->rate_num = params->rate_num;
 404         runtime->rate_den = params->rate_den;
 405
 406         bits = snd_pcm_format_physical_width(runtime->format);
 407         runtime->sample_bits = bits;
 408         bits *= runtime->channels;
 409         runtime->frame_bits = bits;
 410         frames = 1;
 411         while (bits % 8 != 0) {
 412                 bits *= 2;
 413                 frames *= 2;
 414         }
 415         runtime->byte_align = bits / 8;
 416         runtime->min_align = frames;
 417
 418         /* Default sw params */
 419         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 420         runtime->period_step = 1;
 421         runtime->sleep_min = 0;
 422         runtime->control->avail_min = runtime->period_size;
 423         runtime->xfer_align = runtime->period_size;
 424         runtime->start_threshold = 1;
 425         runtime->stop_threshold = runtime->buffer_size;
 426         runtime->silence_threshold = 0;
 427         runtime->silence_size = 0;
 428         runtime->boundary = runtime->buffer_size;
 429         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 430                 runtime->boundary *= 2;
 431
 432         snd_pcm_timer_resolution_change(substream);
 433         runtime->status->state = SNDRV_PCM_STATE_SETUP;
 434         return 0;
 435  _error:
 436         /* hardware might be unuseable from this time,
 437            so we force application to retry to set
 438            the correct hardware parameter settings */
 439         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 440         if (substream->ops->hw_free != NULL)
 441                 substream->ops->hw_free(substream);
 442         return err;
 443 }
 444
 445 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 446                                   struct snd_pcm_hw_params __user * _params)
 447 {
 448         struct snd_pcm_hw_params *params;
 449         int err;
 450
 451         params = kmalloc(sizeof(*params), GFP_KERNEL);
 452         if (!params) {
 453                 err = -ENOMEM;
 454                 goto out;
 455         }
 456         if (copy_from_user(params, _params, sizeof(*params))) {
 457                 err = -EFAULT;
 458                 goto out;
 459         }
 460         err = snd_pcm_hw_params(substream, params);
 461         if (copy_to_user(_params, params, sizeof(*params))) {
 462                 if (!err)
 463                         err = -EFAULT;
 464         }
 465 out:
 466         kfree(params);
 467         return err;
 468 }
 469
 470 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 471 {
 472         struct snd_pcm_runtime *runtime;
 473         int result = 0;
 474
 475         snd_assert(substream != NULL, return -ENXIO);
 476         runtime = substream->runtime;
 477         snd_assert(runtime != NULL, return -ENXIO);
 478         snd_pcm_stream_lock_irq(substream);
 479         switch (runtime->status->state) {
 480         case SNDRV_PCM_STATE_SETUP:
 481         case SNDRV_PCM_STATE_PREPARED:
 482                 break;
 483         default:
 484                 snd_pcm_stream_unlock_irq(substream);
 485                 return -EBADFD;
 486         }
 487         snd_pcm_stream_unlock_irq(substream);
 488         if (atomic_read(&runtime->mmap_count))
 489                 return -EBADFD;
 490         if (substream->ops->hw_free)
 491                 result = substream->ops->hw_free(substream);
 492         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 493         return result;
 494 }
 495
 496 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 497                              struct snd_pcm_sw_params *params)
 498 {
 499         struct snd_pcm_runtime *runtime;
 500
 501         snd_assert(substream != NULL, return -ENXIO);
 502         runtime = substream->runtime;
 503         snd_assert(runtime != NULL, return -ENXIO);
 504         snd_pcm_stream_lock_irq(substream);
 505         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 506                 snd_pcm_stream_unlock_irq(substream);
 507                 return -EBADFD;
 508         }
 509         snd_pcm_stream_unlock_irq(substream);
 510
 511         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 512                 return -EINVAL;
 513         if (params->avail_min == 0)
 514                 return -EINVAL;
 515         if (params->xfer_align == 0 ||
 516             params->xfer_align % runtime->min_align != 0)
 517                 return -EINVAL;
 518         if (params->silence_size >= runtime->boundary) {
 519                 if (params->silence_threshold != 0)
 520                         return -EINVAL;
 521         } else {
 522                 if (params->silence_size > params->silence_threshold)
 523                         return -EINVAL;
 524                 if (params->silence_threshold > runtime->buffer_size)
 525                         return -EINVAL;
 526         }
 527         snd_pcm_stream_lock_irq(substream);
 528         runtime->tstamp_mode = params->tstamp_mode;
 529         runtime->sleep_min = params->sleep_min;
 530         runtime->period_step = params->period_step;
 531         runtime->control->avail_min = params->avail_min;
 532         runtime->start_threshold = params->start_threshold;
 533         runtime->stop_threshold = params->stop_threshold;
 534         runtime->silence_threshold = params->silence_threshold;
 535         runtime->silence_size = params->silence_size;
 536         runtime->xfer_align = params->xfer_align;
 537         params->boundary = runtime->boundary;
 538         if (snd_pcm_running(substream)) {
 539                 if (runtime->sleep_min)
 540                         snd_pcm_tick_prepare(substream);
 541                 else
 542                         snd_pcm_tick_set(substream, 0);
 543                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 544                     runtime->silence_size > 0)
 545                         snd_pcm_playback_silence(substream, ULONG_MAX);
 546                 wake_up(&runtime->sleep);
 547         }
 548         snd_pcm_stream_unlock_irq(substream);
 549         return 0;
 550 }
 551
 552 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 553                                   struct snd_pcm_sw_params __user * _params)
 554 {
 555         struct snd_pcm_sw_params params;
 556         int err;
 557         if (copy_from_user(&params, _params, sizeof(params)))
 558                 return -EFAULT;
 559         err = snd_pcm_sw_params(substream, &params);
 560         if (copy_to_user(_params, &params, sizeof(params)))
 561                 return -EFAULT;
 562         return err;
 563 }
 564
 565 int snd_pcm_status(struct snd_pcm_substream *substream,
 566                    struct snd_pcm_status *status)
 567 {
 568         struct snd_pcm_runtime *runtime = substream->runtime;
 569
 570         snd_pcm_stream_lock_irq(substream);
 571         status->state = runtime->status->state;
 572         status->suspended_state = runtime->status->suspended_state;
 573         if (status->state == SNDRV_PCM_STATE_OPEN)
 574                 goto _end;
 575         status->trigger_tstamp = runtime->trigger_tstamp;
 576         if (snd_pcm_running(substream)) {
 577                 snd_pcm_update_hw_ptr(substream);
 578                 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
 579                         status->tstamp = runtime->status->tstamp;
 580                 else
 581                         getnstimeofday(&status->tstamp);
 582         } else
 583                 getnstimeofday(&status->tstamp);
 584         status->appl_ptr = runtime->control->appl_ptr;
 585         status->hw_ptr = runtime->status->hw_ptr;
 586         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 587                 status->avail = snd_pcm_playback_avail(runtime);
 588                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 589                     runtime->status->state == SNDRV_PCM_STATE_DRAINING)
 590                         status->delay = runtime->buffer_size - status->avail;
 591                 else
 592                         status->delay = 0;
 593         } else {
 594                 status->avail = snd_pcm_capture_avail(runtime);
 595                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 596                         status->delay = status->avail;
 597                 else
 598                         status->delay = 0;
 599         }
 600         status->avail_max = runtime->avail_max;
 601         status->overrange = runtime->overrange;
 602         runtime->avail_max = 0;
 603         runtime->overrange = 0;
 604  _end:
 605         snd_pcm_stream_unlock_irq(substream);
 606         return 0;
 607 }
 608
 609 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 610                                struct snd_pcm_status __user * _status)
 611 {
 612         struct snd_pcm_status status;
 613         struct snd_pcm_runtime *runtime;
 614         int res;
 615
 616         snd_assert(substream != NULL, return -ENXIO);
 617         runtime = substream->runtime;
 618         memset(&status, 0, sizeof(status));
 619         res = snd_pcm_status(substream, &status);
 620         if (res < 0)
 621                 return res;
 622         if (copy_to_user(_status, &status, sizeof(status)))
 623                 return -EFAULT;
 624         return 0;
 625 }
 626
 627 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 628                                 struct snd_pcm_channel_info * info)
 629 {
 630         struct snd_pcm_runtime *runtime;
 631         unsigned int channel;
 632
 633         snd_assert(substream != NULL, return -ENXIO);
 634         channel = info->channel;
 635         runtime = substream->runtime;
 636         snd_pcm_stream_lock_irq(substream);
 637         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 638                 snd_pcm_stream_unlock_irq(substream);
 639                 return -EBADFD;
 640         }
 641         snd_pcm_stream_unlock_irq(substream);
 642         if (channel >= runtime->channels)
 643                 return -EINVAL;
 644         memset(info, 0, sizeof(*info));
 645         info->channel = channel;
 646         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 647 }
 648
 649 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 650                                      struct snd_pcm_channel_info __user * _info)
 651 {
 652         struct snd_pcm_channel_info info;
 653         int res;
 654
 655         if (copy_from_user(&info, _info, sizeof(info)))
 656                 return -EFAULT;
 657         res = snd_pcm_channel_info(substream, &info);
 658         if (res < 0)
 659                 return res;
 660         if (copy_to_user(_info, &info, sizeof(info)))
 661                 return -EFAULT;
 662         return 0;
 663 }
 664
 665 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 666 {
 667         struct snd_pcm_runtime *runtime = substream->runtime;
 668         if (runtime->trigger_master == NULL)
 669                 return;
 670         if (runtime->trigger_master == substream) {
 671                 getnstimeofday(&runtime->trigger_tstamp);
 672         } else {
 673                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 674                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 675         }
 676         runtime->trigger_master = NULL;
 677 }
 678
 679 struct action_ops {
 680         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 681         int (*do_action)(struct snd_pcm_substream *substream, int state);
 682         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 683         void (*post_action)(struct snd_pcm_substream *substream, int state);
 684 };
 685
 686 /*
 687  *  this functions is core for handling of linked stream
 688  *  Note: the stream state might be changed also on failure
 689  *  Note2: call with calling stream lock + link lock
 690  */
 691 static int snd_pcm_action_group(struct action_ops *ops,
 692                                 struct snd_pcm_substream *substream,
 693                                 int state, int do_lock)
 694 {
 695         struct list_head *pos;
 696         struct snd_pcm_substream *s = NULL;
 697         struct snd_pcm_substream *s1;
 698         int res = 0;
 699
 700         snd_pcm_group_for_each(pos, substream) {
 701                 s = snd_pcm_group_substream_entry(pos);
 702                 if (do_lock && s != substream)
 703                         spin_lock(&s->self_group.lock);
 704                 res = ops->pre_action(s, state);
 705                 if (res < 0)
 706                         goto _unlock;
 707         }
 708         snd_pcm_group_for_each(pos, substream) {
 709                 s = snd_pcm_group_substream_entry(pos);
 710                 res = ops->do_action(s, state);
 711                 if (res < 0) {
 712                         if (ops->undo_action) {
 713                                 snd_pcm_group_for_each(pos, substream) {
 714                                         s1 = snd_pcm_group_substream_entry(pos);
 715                                         if (s1 == s) /* failed stream */
 716                                                 break;
 717                                         ops->undo_action(s1, state);
 718                                 }
 719                         }
 720                         s = NULL; /* unlock all */
 721                         goto _unlock;
 722                 }
 723         }
 724         snd_pcm_group_for_each(pos, substream) {
 725                 s = snd_pcm_group_substream_entry(pos);
 726                 ops->post_action(s, state);
 727         }
 728  _unlock:
 729         if (do_lock) {
 730                 /* unlock streams */
 731                 snd_pcm_group_for_each(pos, substream) {
 732                         s1 = snd_pcm_group_substream_entry(pos);
 733                         if (s1 != substream)
 734                                 spin_unlock(&s1->self_group.lock);
 735                         if (s1 == s)    /* end */
 736                                 break;
 737                 }
 738         }
 739         return res;
 740 }
 741
 742 /*
 743  *  Note: call with stream lock
 744  */
 745 static int snd_pcm_action_single(struct action_ops *ops,
 746                                  struct snd_pcm_substream *substream,
 747                                  int state)
 748 {
 749         int res;
 750
 751         res = ops->pre_action(substream, state);
 752         if (res < 0)
 753                 return res;
 754         res = ops->do_action(substream, state);
 755         if (res == 0)
 756                 ops->post_action(substream, state);
 757         else if (ops->undo_action)
 758                 ops->undo_action(substream, state);
 759         return res;
 760 }
 761
 762 /*
 763  *  Note: call with stream lock
 764  */
 765 static int snd_pcm_action(struct action_ops *ops,
 766                           struct snd_pcm_substream *substream,
 767                           int state)
 768 {
 769         int res;
 770
 771         if (snd_pcm_stream_linked(substream)) {
 772                 if (!spin_trylock(&substream->group->lock)) {
 773                         spin_unlock(&substream->self_group.lock);
 774                         spin_lock(&substream->group->lock);
 775                         spin_lock(&substream->self_group.lock);
 776                 }
 777                 res = snd_pcm_action_group(ops, substream, state, 1);
 778                 spin_unlock(&substream->group->lock);
 779         } else {
 780                 res = snd_pcm_action_single(ops, substream, state);
 781         }
 782         return res;
 783 }
 784
 785 /*
 786  *  Note: don't use any locks before
 787  */
 788 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 789                                    struct snd_pcm_substream *substream,
 790                                    int state)
 791 {
 792         int res;
 793
 794         read_lock_irq(&snd_pcm_link_rwlock);
 795         if (snd_pcm_stream_linked(substream)) {
 796                 spin_lock(&substream->group->lock);
 797                 spin_lock(&substream->self_group.lock);
 798                 res = snd_pcm_action_group(ops, substream, state, 1);
 799                 spin_unlock(&substream->self_group.lock);
 800                 spin_unlock(&substream->group->lock);
 801         } else {
 802                 spin_lock(&substream->self_group.lock);
 803                 res = snd_pcm_action_single(ops, substream, state);
 804                 spin_unlock(&substream->self_group.lock);
 805         }
 806         read_unlock_irq(&snd_pcm_link_rwlock);
 807         return res;
 808 }
 809
 810 /*
 811  */
 812 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 813                                     struct snd_pcm_substream *substream,
 814                                     int state)
 815 {
 816         int res;
 817
 818         down_read(&snd_pcm_link_rwsem);
 819         if (snd_pcm_stream_linked(substream))
 820                 res = snd_pcm_action_group(ops, substream, state, 0);
 821         else
 822                 res = snd_pcm_action_single(ops, substream, state);
 823         up_read(&snd_pcm_link_rwsem);
 824         return res;
 825 }
 826
 827 /*
 828  * start callbacks
 829  */
 830 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 831 {
 832         struct snd_pcm_runtime *runtime = substream->runtime;
 833         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 834                 return -EBADFD;
 835         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 836             !snd_pcm_playback_data(substream))
 837                 return -EPIPE;
 838         runtime->trigger_master = substream;
 839         return 0;
 840 }
 841
 842 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 843 {
 844         if (substream->runtime->trigger_master != substream)
 845                 return 0;
 846         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
 847 }
 848
 849 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
 850 {
 851         if (substream->runtime->trigger_master == substream)
 852                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 853 }
 854
 855 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
 856 {
 857         struct snd_pcm_runtime *runtime = substream->runtime;
 858         snd_pcm_trigger_tstamp(substream);
 859         runtime->status->state = state;
 860         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 861             runtime->silence_size > 0)
 862                 snd_pcm_playback_silence(substream, ULONG_MAX);
 863         if (runtime->sleep_min)
 864                 snd_pcm_tick_prepare(substream);
 865         if (substream->timer)
 866                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
 867                                  &runtime->trigger_tstamp);
 868 }
 869
 870 static struct action_ops snd_pcm_action_start = {
 871         .pre_action = snd_pcm_pre_start,
 872         .do_action = snd_pcm_do_start,
 873         .undo_action = snd_pcm_undo_start,
 874         .post_action = snd_pcm_post_start
 875 };
 876
 877 /**
 878  * snd_pcm_start
 879  * @substream: the PCM substream instance
 880  *
 881  * Start all linked streams.
 882  */
 883 int snd_pcm_start(struct snd_pcm_substream *substream)
 884 {
 885         return snd_pcm_action(&snd_pcm_action_start, substream,
 886                               SNDRV_PCM_STATE_RUNNING);
 887 }
 888
 889 /*
 890  * stop callbacks
 891  */
 892 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
 893 {
 894         struct snd_pcm_runtime *runtime = substream->runtime;
 895         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 896                 return -EBADFD;
 897         runtime->trigger_master = substream;
 898         return 0;
 899 }
 900
 901 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
 902 {
 903         if (substream->runtime->trigger_master == substream &&
 904             snd_pcm_running(substream))
 905                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 906         return 0; /* unconditonally stop all substreams */
 907 }
 908
 909 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
 910 {
 911         struct snd_pcm_runtime *runtime = substream->runtime;
 912         if (runtime->status->state != state) {
 913                 snd_pcm_trigger_tstamp(substream);
 914                 if (substream->timer)
 915                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
 916                                          &runtime->trigger_tstamp);
 917                 runtime->status->state = state;
 918                 snd_pcm_tick_set(substream, 0);
 919         }
 920         wake_up(&runtime->sleep);
 921 }
 922
 923 static struct action_ops snd_pcm_action_stop = {
 924         .pre_action = snd_pcm_pre_stop,
 925         .do_action = snd_pcm_do_stop,
 926         .post_action = snd_pcm_post_stop
 927 };
 928
 929 /**
 930  * snd_pcm_stop
 931  * @substream: the PCM substream instance
 932  * @state: PCM state after stopping the stream
 933  *
 934  * Try to stop all running streams in the substream group.
 935  * The state of each stream is changed to the given value after that unconditionally.
 936  */
 937 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
 938 {
 939         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
 940 }
 941
 942 EXPORT_SYMBOL(snd_pcm_stop);
 943
 944 /**
 945  * snd_pcm_drain_done
 946  * @substream: the PCM substream
 947  *
 948  * Stop the DMA only when the given stream is playback.
 949  * The state is changed to SETUP.
 950  * Unlike snd_pcm_stop(), this affects only the given stream.
 951  */
 952 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
 953 {
 954         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
 955                                      SNDRV_PCM_STATE_SETUP);
 956 }
 957
 958 /*
 959  * pause callbacks
 960  */
 961 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
 962 {
 963         struct snd_pcm_runtime *runtime = substream->runtime;
 964         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
 965                 return -ENOSYS;
 966         if (push) {
 967                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
 968                         return -EBADFD;
 969         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
 970                 return -EBADFD;
 971         runtime->trigger_master = substream;
 972         return 0;
 973 }
 974
 975 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
 976 {
 977         if (substream->runtime->trigger_master != substream)
 978                 return 0;
 979         return substream->ops->trigger(substream,
 980                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
 981                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
 982 }
 983
 984 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
 985 {
 986         if (substream->runtime->trigger_master == substream)
 987                 substream->ops->trigger(substream,
 988                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
 989                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
 990 }
 991
 992 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
 993 {
 994         struct snd_pcm_runtime *runtime = substream->runtime;
 995         snd_pcm_trigger_tstamp(substream);
 996         if (push) {
 997                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
 998                 if (substream->timer)
 999                         snd_timer_notify(substream->timer,
1000                                          SNDRV_TIMER_EVENT_MPAUSE,
1001                                          &runtime->trigger_tstamp);
1002                 snd_pcm_tick_set(substream, 0);
1003                 wake_up(&runtime->sleep);
1004         } else {
1005                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1006                 if (runtime->sleep_min)
1007                         snd_pcm_tick_prepare(substream);
1008                 if (substream->timer)
1009                         snd_timer_notify(substream->timer,
1010                                          SNDRV_TIMER_EVENT_MCONTINUE,
1011                                          &runtime->trigger_tstamp);
1012         }
1013 }
1014
1015 static struct action_ops snd_pcm_action_pause = {
1016         .pre_action = snd_pcm_pre_pause,
1017         .do_action = snd_pcm_do_pause,
1018         .undo_action = snd_pcm_undo_pause,
1019         .post_action = snd_pcm_post_pause
1020 };
1021
1022 /*
1023  * Push/release the pause for all linked streams.
1024  */
1025 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1026 {
1027         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1028 }
1029
1030 #ifdef CONFIG_PM
1031 /* suspend */
1032
1033 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1034 {
1035         struct snd_pcm_runtime *runtime = substream->runtime;
1036         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1037                 return -EBUSY;
1038         runtime->trigger_master = substream;
1039         return 0;
1040 }
1041
1042 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1043 {
1044         struct snd_pcm_runtime *runtime = substream->runtime;
1045         if (runtime->trigger_master != substream)
1046                 return 0;
1047         if (! snd_pcm_running(substream))
1048                 return 0;
1049         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1050         return 0; /* suspend unconditionally */
1051 }
1052
1053 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1054 {
1055         struct snd_pcm_runtime *runtime = substream->runtime;
1056         snd_pcm_trigger_tstamp(substream);
1057         if (substream->timer)
1058                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1059                                  &runtime->trigger_tstamp);
1060         runtime->status->suspended_state = runtime->status->state;
1061         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1062         snd_pcm_tick_set(substream, 0);
1063         wake_up(&runtime->sleep);
1064 }
1065
1066 static struct action_ops snd_pcm_action_suspend = {
1067         .pre_action = snd_pcm_pre_suspend,
1068         .do_action = snd_pcm_do_suspend,
1069         .post_action = snd_pcm_post_suspend
1070 };
1071
1072 /**
1073  * snd_pcm_suspend
1074  * @substream: the PCM substream
1075  *
1076  * Trigger SUSPEND to all linked streams.
1077  * After this call, all streams are changed to SUSPENDED state.
1078  */
1079 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1080 {
1081         int err;
1082         unsigned long flags;
1083
1084         if (! substream)
1085                 return 0;
1086
1087         snd_pcm_stream_lock_irqsave(substream, flags);
1088         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1089         snd_pcm_stream_unlock_irqrestore(substream, flags);
1090         return err;
1091 }
1092
1093 EXPORT_SYMBOL(snd_pcm_suspend);
1094
1095 /**
1096  * snd_pcm_suspend_all
1097  * @pcm: the PCM instance
1098  *
1099  * Trigger SUSPEND to all substreams in the given pcm.
1100  * After this call, all streams are changed to SUSPENDED state.
1101  */
1102 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1103 {
1104         struct snd_pcm_substream *substream;
1105         int stream, err = 0;
1106
1107         if (! pcm)
1108                 return 0;
1109
1110         for (stream = 0; stream < 2; stream++) {
1111                 for (substream = pcm->streams[stream].substream;
1112                      substream; substream = substream->next) {
1113                         /* FIXME: the open/close code should lock this as well */
1114                         if (substream->runtime == NULL)
1115                                 continue;
1116                         err = snd_pcm_suspend(substream);
1117                         if (err < 0 && err != -EBUSY)
1118                                 return err;
1119                 }
1120         }
1121         return 0;
1122 }
1123
1124 EXPORT_SYMBOL(snd_pcm_suspend_all);
1125
1126 /* resume */
1127
1128 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1129 {
1130         struct snd_pcm_runtime *runtime = substream->runtime;
1131         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1132                 return -ENOSYS;
1133         runtime->trigger_master = substream;
1134         return 0;
1135 }
1136
1137 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1138 {
1139         struct snd_pcm_runtime *runtime = substream->runtime;
1140         if (runtime->trigger_master != substream)
1141                 return 0;
1142         /* DMA not running previously? */
1143         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1144             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1145              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1146                 return 0;
1147         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1148 }
1149
1150 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1151 {
1152         if (substream->runtime->trigger_master == substream &&
1153             snd_pcm_running(substream))
1154                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1155 }
1156
1157 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1158 {
1159         struct snd_pcm_runtime *runtime = substream->runtime;
1160         snd_pcm_trigger_tstamp(substream);
1161         if (substream->timer)
1162                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1163                                  &runtime->trigger_tstamp);
1164         runtime->status->state = runtime->status->suspended_state;
1165         if (runtime->sleep_min)
1166                 snd_pcm_tick_prepare(substream);
1167 }
1168
1169 static struct action_ops snd_pcm_action_resume = {
1170         .pre_action = snd_pcm_pre_resume,
1171         .do_action = snd_pcm_do_resume,
1172         .undo_action = snd_pcm_undo_resume,
1173         .post_action = snd_pcm_post_resume
1174 };
1175
1176 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1177 {
1178         struct snd_card *card = substream->pcm->card;
1179         int res;
1180
1181         snd_power_lock(card);
1182         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1183                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1184         snd_power_unlock(card);
1185         return res;
1186 }
1187
1188 #else
1189
1190 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1191 {
1192         return -ENOSYS;
1193 }
1194
1195 #endif /* CONFIG_PM */
1196
1197 /*
1198  * xrun ioctl
1199  *
1200  * Change the RUNNING stream(s) to XRUN state.
1201  */
1202 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1203 {
1204         struct snd_card *card = substream->pcm->card;
1205         struct snd_pcm_runtime *runtime = substream->runtime;
1206         int result;
1207
1208         snd_power_lock(card);
1209         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1210                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1211                 if (result < 0)
1212                         goto _unlock;
1213         }
1214
1215         snd_pcm_stream_lock_irq(substream);
1216         switch (runtime->status->state) {
1217         case SNDRV_PCM_STATE_XRUN:
1218                 result = 0;     /* already there */
1219                 break;
1220         case SNDRV_PCM_STATE_RUNNING:
1221                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1222                 break;
1223         default:
1224                 result = -EBADFD;
1225         }
1226         snd_pcm_stream_unlock_irq(substream);
1227  _unlock:
1228         snd_power_unlock(card);
1229         return result;
1230 }
1231
1232 /*
1233  * reset ioctl
1234  */
1235 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1236 {
1237         struct snd_pcm_runtime *runtime = substream->runtime;
1238         switch (runtime->status->state) {
1239         case SNDRV_PCM_STATE_RUNNING:
1240         case SNDRV_PCM_STATE_PREPARED:
1241         case SNDRV_PCM_STATE_PAUSED:
1242         case SNDRV_PCM_STATE_SUSPENDED:
1243                 return 0;
1244         default:
1245                 return -EBADFD;
1246         }
1247 }
1248
1249 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1250 {
1251         struct snd_pcm_runtime *runtime = substream->runtime;
1252         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1253         if (err < 0)
1254                 return err;
1255         // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1256         runtime->hw_ptr_base = 0;
1257         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1258                 runtime->status->hw_ptr % runtime->period_size;
1259         runtime->silence_start = runtime->status->hw_ptr;
1260         runtime->silence_filled = 0;
1261         return 0;
1262 }
1263
1264 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1265 {
1266         struct snd_pcm_runtime *runtime = substream->runtime;
1267         runtime->control->appl_ptr = runtime->status->hw_ptr;
1268         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1269             runtime->silence_size > 0)
1270                 snd_pcm_playback_silence(substream, ULONG_MAX);
1271 }
1272
1273 static struct action_ops snd_pcm_action_reset = {
1274         .pre_action = snd_pcm_pre_reset,
1275         .do_action = snd_pcm_do_reset,
1276         .post_action = snd_pcm_post_reset
1277 };
1278
1279 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1280 {
1281         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1282 }
1283
1284 /*
1285  * prepare ioctl
1286  */
1287 /* we use the second argument for updating f_flags */
1288 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1289                                int f_flags)
1290 {
1291         struct snd_pcm_runtime *runtime = substream->runtime;
1292         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1293                 return -EBADFD;
1294         if (snd_pcm_running(substream))
1295                 return -EBUSY;
1296         substream->f_flags = f_flags;
1297         return 0;
1298 }
1299
1300 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1301 {
1302         int err;
1303         err = substream->ops->prepare(substream);
1304         if (err < 0)
1305                 return err;
1306         return snd_pcm_do_reset(substream, 0);
1307 }
1308
1309 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1310 {
1311         struct snd_pcm_runtime *runtime = substream->runtime;
1312         runtime->control->appl_ptr = runtime->status->hw_ptr;
1313         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1314 }
1315
1316 static struct action_ops snd_pcm_action_prepare = {
1317         .pre_action = snd_pcm_pre_prepare,
1318         .do_action = snd_pcm_do_prepare,
1319         .post_action = snd_pcm_post_prepare
1320 };
1321
1322 /**
1323  * snd_pcm_prepare
1324  * @substream: the PCM substream instance
1325  * @file: file to refer f_flags
1326  *
1327  * Prepare the PCM substream to be triggerable.
1328  */
1329 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1330                            struct file *file)
1331 {
1332         int res;
1333         struct snd_card *card = substream->pcm->card;
1334         int f_flags;
1335
1336         if (file)
1337                 f_flags = file->f_flags;
1338         else
1339                 f_flags = substream->f_flags;
1340
1341         snd_power_lock(card);
1342         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1343                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1344                                                substream, f_flags);
1345         snd_power_unlock(card);
1346         return res;
1347 }
1348
1349 /*
1350  * drain ioctl
1351  */
1352
1353 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1354 {
1355         if (substream->f_flags & O_NONBLOCK)
1356                 return -EAGAIN;
1357         substream->runtime->trigger_master = substream;
1358         return 0;
1359 }
1360
1361 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1362 {
1363         struct snd_pcm_runtime *runtime = substream->runtime;
1364         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1365                 switch (runtime->status->state) {
1366                 case SNDRV_PCM_STATE_PREPARED:
1367                         /* start playback stream if possible */
1368                         if (! snd_pcm_playback_empty(substream)) {
1369                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1370                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1371                         }
1372                         break;
1373                 case SNDRV_PCM_STATE_RUNNING:
1374                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1375                         break;
1376                 default:
1377                         break;
1378                 }
1379         } else {
1380                 /* stop running stream */
1381                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1382                         int state = snd_pcm_capture_avail(runtime) > 0 ?
1383                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1384                         snd_pcm_do_stop(substream, state);
1385                         snd_pcm_post_stop(substream, state);
1386                 }
1387         }
1388         return 0;
1389 }
1390
1391 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1392 {
1393 }
1394
1395 static struct action_ops snd_pcm_action_drain_init = {
1396         .pre_action = snd_pcm_pre_drain_init,
1397         .do_action = snd_pcm_do_drain_init,
1398         .post_action = snd_pcm_post_drain_init
1399 };
1400
1401 struct drain_rec {
1402         struct snd_pcm_substream *substream;
1403         wait_queue_t wait;
1404         snd_pcm_uframes_t stop_threshold;
1405 };
1406
1407 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1408
1409 /*
1410  * Drain the stream(s).
1411  * When the substream is linked, sync until the draining of all playback streams
1412  * is finished.
1413  * After this call, all streams are supposed to be either SETUP or DRAINING
1414  * (capture only) state.
1415  */
1416 static int snd_pcm_drain(struct snd_pcm_substream *substream)
1417 {
1418         struct snd_card *card;
1419         struct snd_pcm_runtime *runtime;
1420         struct list_head *pos;
1421         int result = 0;
1422         int i, num_drecs;
1423         struct drain_rec *drec, drec_tmp, *d;
1424
1425         snd_assert(substream != NULL, return -ENXIO);
1426         card = substream->pcm->card;
1427         runtime = substream->runtime;
1428
1429         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1430                 return -EBADFD;
1431
1432         snd_power_lock(card);
1433         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1434                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1435                 if (result < 0) {
1436                         snd_power_unlock(card);
1437                         return result;
1438                 }
1439         }
1440
1441         /* allocate temporary record for drain sync */
1442         down_read(&snd_pcm_link_rwsem);
1443         if (snd_pcm_stream_linked(substream)) {
1444                 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1445                 if (! drec) {
1446                         up_read(&snd_pcm_link_rwsem);
1447                         snd_power_unlock(card);
1448                         return -ENOMEM;
1449                 }
1450         } else
1451                 drec = &drec_tmp;
1452
1453         /* count only playback streams */
1454         num_drecs = 0;
1455         snd_pcm_group_for_each(pos, substream) {
1456                 struct snd_pcm_substream *s = snd_pcm_group_substream_entry(pos);
1457                 runtime = s->runtime;
1458                 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1459                         d = &drec[num_drecs++];
1460                         d->substream = s;
1461                         init_waitqueue_entry(&d->wait, current);
1462                         add_wait_queue(&runtime->sleep, &d->wait);
1463                         /* stop_threshold fixup to avoid endless loop when
1464                          * stop_threshold > buffer_size
1465                          */
1466                         d->stop_threshold = runtime->stop_threshold;
1467                         if (runtime->stop_threshold > runtime->buffer_size)
1468                                 runtime->stop_threshold = runtime->buffer_size;
1469                 }
1470         }
1471         up_read(&snd_pcm_link_rwsem);
1472         if (! num_drecs)
1473                 goto _error;
1474
1475         snd_pcm_stream_lock_irq(substream);
1476         /* resume pause */
1477         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1478                 snd_pcm_pause(substream, 0);
1479
1480         /* pre-start/stop - all running streams are changed to DRAINING state */
1481         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1482         if (result < 0) {
1483                 snd_pcm_stream_unlock_irq(substream);
1484                 goto _error;
1485         }
1486
1487         for (;;) {
1488                 long tout;
1489                 if (signal_pending(current)) {
1490                         result = -ERESTARTSYS;
1491                         break;
1492                 }
1493                 /* all finished? */
1494                 for (i = 0; i < num_drecs; i++) {
1495                         runtime = drec[i].substream->runtime;
1496                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1497                                 break;
1498                 }
1499                 if (i == num_drecs)
1500                         break; /* yes, all drained */
1501
1502                 set_current_state(TASK_INTERRUPTIBLE);
1503                 snd_pcm_stream_unlock_irq(substream);
1504                 snd_power_unlock(card);
1505                 tout = schedule_timeout(10 * HZ);
1506                 snd_power_lock(card);
1507                 snd_pcm_stream_lock_irq(substream);
1508                 if (tout == 0) {
1509                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1510                                 result = -ESTRPIPE;
1511                         else {
1512                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1513                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1514                                 result = -EIO;
1515                         }
1516                         break;
1517                 }
1518         }
1519
1520         snd_pcm_stream_unlock_irq(substream);
1521
1522  _error:
1523         for (i = 0; i < num_drecs; i++) {
1524                 d = &drec[i];
1525                 runtime = d->substream->runtime;
1526                 remove_wait_queue(&runtime->sleep, &d->wait);
1527                 runtime->stop_threshold = d->stop_threshold;
1528         }
1529
1530         if (drec != &drec_tmp)
1531                 kfree(drec);
1532         snd_power_unlock(card);
1533
1534         return result;
1535 }
1536
1537 /*
1538  * drop ioctl
1539  *
1540  * Immediately put all linked substreams into SETUP state.
1541  */
1542 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1543 {
1544         struct snd_pcm_runtime *runtime;
1545         struct snd_card *card;
1546         int result = 0;
1547
1548         snd_assert(substream != NULL, return -ENXIO);
1549         runtime = substream->runtime;
1550         card = substream->pcm->card;
1551
1552         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1553                 return -EBADFD;
1554
1555         snd_power_lock(card);
1556         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1557                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1558                 if (result < 0)
1559                         goto _unlock;
1560         }
1561
1562         snd_pcm_stream_lock_irq(substream);
1563         /* resume pause */
1564         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1565                 snd_pcm_pause(substream, 0);
1566
1567         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1568         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1569         snd_pcm_stream_unlock_irq(substream);
1570  _unlock:
1571         snd_power_unlock(card);
1572         return result;
1573 }
1574
1575
1576 /* WARNING: Don't forget to fput back the file */
1577 static struct file *snd_pcm_file_fd(int fd)
1578 {
1579         struct file *file;
1580         struct inode *inode;
1581         unsigned int minor;
1582
1583         file = fget(fd);
1584         if (!file)
1585                 return NULL;
1586         inode = file->f_dentry->d_inode;
1587         if (!S_ISCHR(inode->i_mode) ||
1588             imajor(inode) != snd_major) {
1589                 fput(file);
1590                 return NULL;
1591         }
1592         minor = iminor(inode);
1593         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1594             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1595                 fput(file);
1596                 return NULL;
1597         }
1598         return file;
1599 }
1600
1601 /*
1602  * PCM link handling
1603  */
1604 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1605 {
1606         int res = 0;
1607         struct file *file;
1608         struct snd_pcm_file *pcm_file;
1609         struct snd_pcm_substream *substream1;
1610
1611         file = snd_pcm_file_fd(fd);
1612         if (!file)
1613                 return -EBADFD;
1614         pcm_file = file->private_data;
1615         substream1 = pcm_file->substream;
1616         down_write(&snd_pcm_link_rwsem);
1617         write_lock_irq(&snd_pcm_link_rwlock);
1618         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1619             substream->runtime->status->state != substream1->runtime->status->state) {
1620                 res = -EBADFD;
1621                 goto _end;
1622         }
1623         if (snd_pcm_stream_linked(substream1)) {
1624                 res = -EALREADY;
1625                 goto _end;
1626         }
1627         if (!snd_pcm_stream_linked(substream)) {
1628                 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1629                 if (substream->group == NULL) {
1630                         res = -ENOMEM;
1631                         goto _end;
1632                 }
1633                 spin_lock_init(&substream->group->lock);
1634                 INIT_LIST_HEAD(&substream->group->substreams);
1635                 list_add_tail(&substream->link_list, &substream->group->substreams);
1636                 substream->group->count = 1;
1637         }
1638         list_add_tail(&substream1->link_list, &substream->group->substreams);
1639         substream->group->count++;
1640         substream1->group = substream->group;
1641  _end:
1642         write_unlock_irq(&snd_pcm_link_rwlock);
1643         up_write(&snd_pcm_link_rwsem);
1644         fput(file);
1645         return res;
1646 }
1647
1648 static void relink_to_local(struct snd_pcm_substream *substream)
1649 {
1650         substream->group = &substream->self_group;
1651         INIT_LIST_HEAD(&substream->self_group.substreams);
1652         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1653 }
1654
1655 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1656 {
1657         struct list_head *pos;
1658         int res = 0;
1659
1660         down_write(&snd_pcm_link_rwsem);
1661         write_lock_irq(&snd_pcm_link_rwlock);
1662         if (!snd_pcm_stream_linked(substream)) {
1663                 res = -EALREADY;
1664                 goto _end;
1665         }
1666         list_del(&substream->link_list);
1667         substream->group->count--;
1668         if (substream->group->count == 1) {     /* detach the last stream, too */
1669                 snd_pcm_group_for_each(pos, substream) {
1670                         relink_to_local(snd_pcm_group_substream_entry(pos));
1671                         break;
1672                 }
1673                 kfree(substream->group);
1674         }
1675         relink_to_local(substream);
1676        _end:
1677         write_unlock_irq(&snd_pcm_link_rwlock);
1678         up_write(&snd_pcm_link_rwsem);
1679         return res;
1680 }
1681
1682 /*
1683  * hw configurator
1684  */
1685 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1686                                struct snd_pcm_hw_rule *rule)
1687 {
1688         struct snd_interval t;
1689         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1690                      hw_param_interval_c(params, rule->deps[1]), &t);
1691         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1692 }
1693
1694 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1695                                struct snd_pcm_hw_rule *rule)
1696 {
1697         struct snd_interval t;
1698         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1699                      hw_param_interval_c(params, rule->deps[1]), &t);
1700         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1701 }
1702
1703 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1704                                    struct snd_pcm_hw_rule *rule)
1705 {
1706         struct snd_interval t;
1707         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1708                          hw_param_interval_c(params, rule->deps[1]),
1709                          (unsigned long) rule->private, &t);
1710         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1711 }
1712
1713 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1714                                    struct snd_pcm_hw_rule *rule)
1715 {
1716         struct snd_interval t;
1717         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1718                          (unsigned long) rule->private,
1719                          hw_param_interval_c(params, rule->deps[1]), &t);
1720         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1721 }
1722
1723 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1724                                   struct snd_pcm_hw_rule *rule)
1725 {
1726         unsigned int k;
1727         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1728         struct snd_mask m;
1729         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1730         snd_mask_any(&m);
1731         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1732                 int bits;
1733                 if (! snd_mask_test(mask, k))
1734                         continue;
1735                 bits = snd_pcm_format_physical_width(k);
1736                 if (bits <= 0)
1737                         continue; /* ignore invalid formats */
1738                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1739                         snd_mask_reset(&m, k);
1740         }
1741         return snd_mask_refine(mask, &m);
1742 }
1743
1744 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1745                                        struct snd_pcm_hw_rule *rule)
1746 {
1747         struct snd_interval t;
1748         unsigned int k;
1749         t.min = UINT_MAX;
1750         t.max = 0;
1751         t.openmin = 0;
1752         t.openmax = 0;
1753         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1754                 int bits;
1755                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1756                         continue;
1757                 bits = snd_pcm_format_physical_width(k);
1758                 if (bits <= 0)
1759                         continue; /* ignore invalid formats */
1760                 if (t.min > (unsigned)bits)
1761                         t.min = bits;
1762                 if (t.max < (unsigned)bits)
1763                         t.max = bits;
1764         }
1765         t.integer = 1;
1766         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1767 }
1768
1769 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1770 #error "Change this table"
1771 #endif
1772
1773 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1774                                  48000, 64000, 88200, 96000, 176400, 192000 };
1775
1776 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1777                                 struct snd_pcm_hw_rule *rule)
1778 {
1779         struct snd_pcm_hardware *hw = rule->private;
1780         return snd_interval_list(hw_param_interval(params, rule->var),
1781                                  ARRAY_SIZE(rates), rates, hw->rates);
1782 }
1783
1784 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1785                                             struct snd_pcm_hw_rule *rule)
1786 {
1787         struct snd_interval t;
1788         struct snd_pcm_substream *substream = rule->private;
1789         t.min = 0;
1790         t.max = substream->buffer_bytes_max;
1791         t.openmin = 0;
1792         t.openmax = 0;
1793         t.integer = 1;
1794         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1795 }
1796
1797 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1798 {
1799         struct snd_pcm_runtime *runtime = substream->runtime;
1800         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1801         int k, err;
1802
1803         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1804                 snd_mask_any(constrs_mask(constrs, k));
1805         }
1806
1807         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1808                 snd_interval_any(constrs_interval(constrs, k));
1809         }
1810
1811         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1812         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1813         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1814         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1815         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1816
1817         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1818                                    snd_pcm_hw_rule_format, NULL,
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_sample_bits, NULL,
1824                                   SNDRV_PCM_HW_PARAM_FORMAT,
1825                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1826         if (err < 0)
1827                 return err;
1828         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1829                                   snd_pcm_hw_rule_div, NULL,
1830                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1831         if (err < 0)
1832                 return err;
1833         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1834                                   snd_pcm_hw_rule_mul, NULL,
1835                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1836         if (err < 0)
1837                 return err;
1838         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1839                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1840                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1841         if (err < 0)
1842                 return err;
1843         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1844                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1845                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1846         if (err < 0)
1847                 return err;
1848         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1849                                   snd_pcm_hw_rule_div, NULL,
1850                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1851         if (err < 0)
1852                 return err;
1853         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1854                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1855                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1856         if (err < 0)
1857                 return err;
1858         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1859                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1860                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1861         if (err < 0)
1862                 return err;
1863         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1864                                   snd_pcm_hw_rule_div, NULL,
1865                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1866         if (err < 0)
1867                 return err;
1868         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1869                                   snd_pcm_hw_rule_div, NULL,
1870                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1871         if (err < 0)
1872                 return err;
1873         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1874                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1875                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1876         if (err < 0)
1877                 return err;
1878         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1879                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1880                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1881         if (err < 0)
1882                 return err;
1883         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1884                                   snd_pcm_hw_rule_mul, NULL,
1885                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1886         if (err < 0)
1887                 return err;
1888         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1889                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1890                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1891         if (err < 0)
1892                 return err;
1893         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1894                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1895                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1896         if (err < 0)
1897                 return err;
1898         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1899                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1900                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1901         if (err < 0)
1902                 return err;
1903         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1904                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1905                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1906         if (err < 0)
1907                 return err;
1908         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1909                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1910                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1911         if (err < 0)
1912                 return err;
1913         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1914                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1915                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1916         if (err < 0)
1917                 return err;
1918         return 0;
1919 }
1920
1921 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1922 {
1923         struct snd_pcm_runtime *runtime = substream->runtime;
1924         struct snd_pcm_hardware *hw = &runtime->hw;
1925         int err;
1926         unsigned int mask = 0;
1927
1928         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1929                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1930         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1931                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1932         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1933                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1934                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1935                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1936                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1937                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1938                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1939         }
1940         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1941         snd_assert(err >= 0, return -EINVAL);
1942
1943         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1944         snd_assert(err >= 0, return -EINVAL);
1945
1946         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1947         snd_assert(err >= 0, return -EINVAL);
1948
1949         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1950                                            hw->channels_min, hw->channels_max);
1951         snd_assert(err >= 0, return -EINVAL);
1952
1953         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1954                                            hw->rate_min, hw->rate_max);
1955         snd_assert(err >= 0, return -EINVAL);
1956
1957         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1958                                            hw->period_bytes_min, hw->period_bytes_max);
1959         snd_assert(err >= 0, return -EINVAL);
1960
1961         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1962                                            hw->periods_min, hw->periods_max);
1963         snd_assert(err >= 0, return -EINVAL);
1964
1965         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1966                                            hw->period_bytes_min, hw->buffer_bytes_max);
1967         snd_assert(err >= 0, return -EINVAL);
1968
1969         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1970                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1971                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1972         if (err < 0)
1973                 return err;
1974
1975         /* FIXME: remove */
1976         if (runtime->dma_bytes) {
1977                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1978                 snd_assert(err >= 0, return -EINVAL);
1979         }
1980
1981         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1982                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1983                                           snd_pcm_hw_rule_rate, hw,
1984                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1985                 if (err < 0)
1986                         return err;
1987         }
1988
1989         /* FIXME: this belong to lowlevel */
1990         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
1991                                      1000000 / HZ, 1000000 / HZ);
1992         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1993
1994         return 0;
1995 }
1996
1997 static void snd_pcm_add_file(struct snd_pcm_str *str,
1998                              struct snd_pcm_file *pcm_file)
1999 {
2000         pcm_file->next = str->files;
2001         str->files = pcm_file;
2002 }
2003
2004 static void snd_pcm_remove_file(struct snd_pcm_str *str,
2005                                 struct snd_pcm_file *pcm_file)
2006 {
2007         struct snd_pcm_file * pcm_file1;
2008         if (str->files == pcm_file) {
2009                 str->files = pcm_file->next;
2010         } else {
2011                 pcm_file1 = str->files;
2012                 while (pcm_file1 && pcm_file1->next != pcm_file)
2013                         pcm_file1 = pcm_file1->next;
2014                 if (pcm_file1 != NULL)
2015                         pcm_file1->next = pcm_file->next;
2016         }
2017 }
2018
2019 static void pcm_release_private(struct snd_pcm_substream *substream)
2020 {
2021         struct snd_pcm_file *pcm_file = substream->file;
2022
2023         snd_pcm_unlink(substream);
2024         snd_pcm_remove_file(substream->pstr, pcm_file);
2025         kfree(pcm_file);
2026 }
2027
2028 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2029 {
2030         substream->ref_count--;
2031         if (substream->ref_count > 0)
2032                 return;
2033
2034         snd_pcm_drop(substream);
2035         if (substream->hw_opened) {
2036                 if (substream->ops->hw_free != NULL)
2037                         substream->ops->hw_free(substream);
2038                 substream->ops->close(substream);
2039                 substream->hw_opened = 0;
2040         }
2041         if (substream->pcm_release) {
2042                 substream->pcm_release(substream);
2043                 substream->pcm_release = NULL;
2044         }
2045         snd_pcm_detach_substream(substream);
2046 }
2047
2048 EXPORT_SYMBOL(snd_pcm_release_substream);
2049
2050 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2051                            struct file *file,
2052                            struct snd_pcm_substream **rsubstream)
2053 {
2054         struct snd_pcm_substream *substream;
2055         int err;
2056
2057         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2058         if (err < 0)
2059                 return err;
2060         if (substream->ref_count > 1) {
2061                 *rsubstream = substream;
2062                 return 0;
2063         }
2064
2065         substream->no_mmap_ctrl = 0;
2066         err = snd_pcm_hw_constraints_init(substream);
2067         if (err < 0) {
2068                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2069                 goto error;
2070         }
2071
2072         if ((err = substream->ops->open(substream)) < 0)
2073                 goto error;
2074
2075         substream->hw_opened = 1;
2076
2077         err = snd_pcm_hw_constraints_complete(substream);
2078         if (err < 0) {
2079                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2080                 goto error;
2081         }
2082
2083         *rsubstream = substream;
2084         return 0;
2085
2086  error:
2087         snd_pcm_release_substream(substream);
2088         return err;
2089 }
2090
2091 EXPORT_SYMBOL(snd_pcm_open_substream);
2092
2093 static int snd_pcm_open_file(struct file *file,
2094                              struct snd_pcm *pcm,
2095                              int stream,
2096                              struct snd_pcm_file **rpcm_file)
2097 {
2098         struct snd_pcm_file *pcm_file;
2099         struct snd_pcm_substream *substream;
2100         struct snd_pcm_str *str;
2101         int err;
2102
2103         snd_assert(rpcm_file != NULL, return -EINVAL);
2104         *rpcm_file = NULL;
2105
2106         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2107         if (err < 0)
2108                 return err;
2109
2110         if (substream->ref_count > 1)
2111                 pcm_file = substream->file;
2112         else {
2113                 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2114                 if (pcm_file == NULL) {
2115                         snd_pcm_release_substream(substream);
2116                         return -ENOMEM;
2117                 }
2118                 str = substream->pstr;
2119                 substream->file = pcm_file;
2120                 substream->pcm_release = pcm_release_private;
2121                 pcm_file->substream = substream;
2122                 snd_pcm_add_file(str, pcm_file);
2123         }
2124         file->private_data = pcm_file;
2125         *rpcm_file = pcm_file;
2126         return 0;
2127 }
2128
2129 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2130 {
2131         struct snd_pcm *pcm;
2132
2133         pcm = snd_lookup_minor_data(iminor(inode),
2134                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2135         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2136 }
2137
2138 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2139 {
2140         struct snd_pcm *pcm;
2141
2142         pcm = snd_lookup_minor_data(iminor(inode),
2143                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2144         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2145 }
2146
2147 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2148 {
2149         int err;
2150         struct snd_pcm_file *pcm_file;
2151         wait_queue_t wait;
2152
2153         if (pcm == NULL) {
2154                 err = -ENODEV;
2155                 goto __error1;
2156         }
2157         err = snd_card_file_add(pcm->card, file);
2158         if (err < 0)
2159                 goto __error1;
2160         if (!try_module_get(pcm->card->module)) {
2161                 err = -EFAULT;
2162                 goto __error2;
2163         }
2164         init_waitqueue_entry(&wait, current);
2165         add_wait_queue(&pcm->open_wait, &wait);
2166         mutex_lock(&pcm->open_mutex);
2167         while (1) {
2168                 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2169                 if (err >= 0)
2170                         break;
2171                 if (err == -EAGAIN) {
2172                         if (file->f_flags & O_NONBLOCK) {
2173                                 err = -EBUSY;
2174                                 break;
2175                         }
2176                 } else
2177                         break;
2178                 set_current_state(TASK_INTERRUPTIBLE);
2179                 mutex_unlock(&pcm->open_mutex);
2180                 schedule();
2181                 mutex_lock(&pcm->open_mutex);
2182                 if (signal_pending(current)) {
2183                         err = -ERESTARTSYS;
2184                         break;
2185                 }
2186         }
2187         remove_wait_queue(&pcm->open_wait, &wait);
2188         mutex_unlock(&pcm->open_mutex);
2189         if (err < 0)
2190                 goto __error;
2191         return err;
2192
2193       __error:
2194         module_put(pcm->card->module);
2195       __error2:
2196         snd_card_file_remove(pcm->card, file);
2197       __error1:
2198         return err;
2199 }
2200
2201 static int snd_pcm_release(struct inode *inode, struct file *file)
2202 {
2203         struct snd_pcm *pcm;
2204         struct snd_pcm_substream *substream;
2205         struct snd_pcm_file *pcm_file;
2206
2207         pcm_file = file->private_data;
2208         substream = pcm_file->substream;
2209         snd_assert(substream != NULL, return -ENXIO);
2210         snd_assert(!atomic_read(&substream->runtime->mmap_count), );
2211         pcm = substream->pcm;
2212         fasync_helper(-1, file, 0, &substream->runtime->fasync);
2213         mutex_lock(&pcm->open_mutex);
2214         snd_pcm_release_substream(substream);
2215         mutex_unlock(&pcm->open_mutex);
2216         wake_up(&pcm->open_wait);
2217         module_put(pcm->card->module);
2218         snd_card_file_remove(pcm->card, file);
2219         return 0;
2220 }
2221
2222 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2223                                                  snd_pcm_uframes_t frames)
2224 {
2225         struct snd_pcm_runtime *runtime = substream->runtime;
2226         snd_pcm_sframes_t appl_ptr;
2227         snd_pcm_sframes_t ret;
2228         snd_pcm_sframes_t hw_avail;
2229
2230         if (frames == 0)
2231                 return 0;
2232
2233         snd_pcm_stream_lock_irq(substream);
2234         switch (runtime->status->state) {
2235         case SNDRV_PCM_STATE_PREPARED:
2236                 break;
2237         case SNDRV_PCM_STATE_DRAINING:
2238         case SNDRV_PCM_STATE_RUNNING:
2239                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2240                         break;
2241                 /* Fall through */
2242         case SNDRV_PCM_STATE_XRUN:
2243                 ret = -EPIPE;
2244                 goto __end;
2245         default:
2246                 ret = -EBADFD;
2247                 goto __end;
2248         }
2249
2250         hw_avail = snd_pcm_playback_hw_avail(runtime);
2251         if (hw_avail <= 0) {
2252                 ret = 0;
2253                 goto __end;
2254         }
2255         if (frames > (snd_pcm_uframes_t)hw_avail)
2256                 frames = hw_avail;
2257         else
2258                 frames -= frames % runtime->xfer_align;
2259         appl_ptr = runtime->control->appl_ptr - frames;
2260         if (appl_ptr < 0)
2261                 appl_ptr += runtime->boundary;
2262         runtime->control->appl_ptr = appl_ptr;
2263         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2264             runtime->sleep_min)
2265                 snd_pcm_tick_prepare(substream);
2266         ret = frames;
2267  __end:
2268         snd_pcm_stream_unlock_irq(substream);
2269         return ret;
2270 }
2271
2272 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2273                                                 snd_pcm_uframes_t frames)
2274 {
2275         struct snd_pcm_runtime *runtime = substream->runtime;
2276         snd_pcm_sframes_t appl_ptr;
2277         snd_pcm_sframes_t ret;
2278         snd_pcm_sframes_t hw_avail;
2279
2280         if (frames == 0)
2281                 return 0;
2282
2283         snd_pcm_stream_lock_irq(substream);
2284         switch (runtime->status->state) {
2285         case SNDRV_PCM_STATE_PREPARED:
2286         case SNDRV_PCM_STATE_DRAINING:
2287                 break;
2288         case SNDRV_PCM_STATE_RUNNING:
2289                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2290                         break;
2291                 /* Fall through */
2292         case SNDRV_PCM_STATE_XRUN:
2293                 ret = -EPIPE;
2294                 goto __end;
2295         default:
2296                 ret = -EBADFD;
2297                 goto __end;
2298         }
2299
2300         hw_avail = snd_pcm_capture_hw_avail(runtime);
2301         if (hw_avail <= 0) {
2302                 ret = 0;
2303                 goto __end;
2304         }
2305         if (frames > (snd_pcm_uframes_t)hw_avail)
2306                 frames = hw_avail;
2307         else
2308                 frames -= frames % runtime->xfer_align;
2309         appl_ptr = runtime->control->appl_ptr - frames;
2310         if (appl_ptr < 0)
2311                 appl_ptr += runtime->boundary;
2312         runtime->control->appl_ptr = appl_ptr;
2313         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2314             runtime->sleep_min)
2315                 snd_pcm_tick_prepare(substream);
2316         ret = frames;
2317  __end:
2318         snd_pcm_stream_unlock_irq(substream);
2319         return ret;
2320 }
2321
2322 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2323                                                   snd_pcm_uframes_t frames)
2324 {
2325         struct snd_pcm_runtime *runtime = substream->runtime;
2326         snd_pcm_sframes_t appl_ptr;
2327         snd_pcm_sframes_t ret;
2328         snd_pcm_sframes_t avail;
2329
2330         if (frames == 0)
2331                 return 0;
2332
2333         snd_pcm_stream_lock_irq(substream);
2334         switch (runtime->status->state) {
2335         case SNDRV_PCM_STATE_PREPARED:
2336         case SNDRV_PCM_STATE_PAUSED:
2337                 break;
2338         case SNDRV_PCM_STATE_DRAINING:
2339         case SNDRV_PCM_STATE_RUNNING:
2340                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2341                         break;
2342                 /* Fall through */
2343         case SNDRV_PCM_STATE_XRUN:
2344                 ret = -EPIPE;
2345                 goto __end;
2346         default:
2347                 ret = -EBADFD;
2348                 goto __end;
2349         }
2350
2351         avail = snd_pcm_playback_avail(runtime);
2352         if (avail <= 0) {
2353                 ret = 0;
2354                 goto __end;
2355         }
2356         if (frames > (snd_pcm_uframes_t)avail)
2357                 frames = avail;
2358         else
2359                 frames -= frames % runtime->xfer_align;
2360         appl_ptr = runtime->control->appl_ptr + frames;
2361         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2362                 appl_ptr -= runtime->boundary;
2363         runtime->control->appl_ptr = appl_ptr;
2364         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2365             runtime->sleep_min)
2366                 snd_pcm_tick_prepare(substream);
2367         ret = frames;
2368  __end:
2369         snd_pcm_stream_unlock_irq(substream);
2370         return ret;
2371 }
2372
2373 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2374                                                  snd_pcm_uframes_t frames)
2375 {
2376         struct snd_pcm_runtime *runtime = substream->runtime;
2377         snd_pcm_sframes_t appl_ptr;
2378         snd_pcm_sframes_t ret;
2379         snd_pcm_sframes_t avail;
2380
2381         if (frames == 0)
2382                 return 0;
2383
2384         snd_pcm_stream_lock_irq(substream);
2385         switch (runtime->status->state) {
2386         case SNDRV_PCM_STATE_PREPARED:
2387         case SNDRV_PCM_STATE_DRAINING:
2388         case SNDRV_PCM_STATE_PAUSED:
2389                 break;
2390         case SNDRV_PCM_STATE_RUNNING:
2391                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2392                         break;
2393                 /* Fall through */
2394         case SNDRV_PCM_STATE_XRUN:
2395                 ret = -EPIPE;
2396                 goto __end;
2397         default:
2398                 ret = -EBADFD;
2399                 goto __end;
2400         }
2401
2402         avail = snd_pcm_capture_avail(runtime);
2403         if (avail <= 0) {
2404                 ret = 0;
2405                 goto __end;
2406         }
2407         if (frames > (snd_pcm_uframes_t)avail)
2408                 frames = avail;
2409         else
2410                 frames -= frames % runtime->xfer_align;
2411         appl_ptr = runtime->control->appl_ptr + frames;
2412         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2413                 appl_ptr -= runtime->boundary;
2414         runtime->control->appl_ptr = appl_ptr;
2415         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2416             runtime->sleep_min)
2417                 snd_pcm_tick_prepare(substream);
2418         ret = frames;
2419  __end:
2420         snd_pcm_stream_unlock_irq(substream);
2421         return ret;
2422 }
2423
2424 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2425 {
2426         struct snd_pcm_runtime *runtime = substream->runtime;
2427         int err;
2428
2429         snd_pcm_stream_lock_irq(substream);
2430         switch (runtime->status->state) {
2431         case SNDRV_PCM_STATE_DRAINING:
2432                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2433                         goto __badfd;
2434         case SNDRV_PCM_STATE_RUNNING:
2435                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2436                         break;
2437                 /* Fall through */
2438         case SNDRV_PCM_STATE_PREPARED:
2439         case SNDRV_PCM_STATE_SUSPENDED:
2440                 err = 0;
2441                 break;
2442         case SNDRV_PCM_STATE_XRUN:
2443                 err = -EPIPE;
2444                 break;
2445         default:
2446               __badfd:
2447                 err = -EBADFD;
2448                 break;
2449         }
2450         snd_pcm_stream_unlock_irq(substream);
2451         return err;
2452 }
2453
2454 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2455                          snd_pcm_sframes_t __user *res)
2456 {
2457         struct snd_pcm_runtime *runtime = substream->runtime;
2458         int err;
2459         snd_pcm_sframes_t n = 0;
2460
2461         snd_pcm_stream_lock_irq(substream);
2462         switch (runtime->status->state) {
2463         case SNDRV_PCM_STATE_DRAINING:
2464                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2465                         goto __badfd;
2466         case SNDRV_PCM_STATE_RUNNING:
2467                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2468                         break;
2469                 /* Fall through */
2470         case SNDRV_PCM_STATE_PREPARED:
2471         case SNDRV_PCM_STATE_SUSPENDED:
2472                 err = 0;
2473                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2474                         n = snd_pcm_playback_hw_avail(runtime);
2475                 else
2476                         n = snd_pcm_capture_avail(runtime);
2477                 break;
2478         case SNDRV_PCM_STATE_XRUN:
2479                 err = -EPIPE;
2480                 break;
2481         default:
2482               __badfd:
2483                 err = -EBADFD;
2484                 break;
2485         }
2486         snd_pcm_stream_unlock_irq(substream);
2487         if (!err)
2488                 if (put_user(n, res))
2489                         err = -EFAULT;
2490         return err;
2491 }
2492
2493 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2494                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2495 {
2496         struct snd_pcm_runtime *runtime = substream->runtime;
2497         struct snd_pcm_sync_ptr sync_ptr;
2498         volatile struct snd_pcm_mmap_status *status;
2499         volatile struct snd_pcm_mmap_control *control;
2500         int err;
2501
2502         memset(&sync_ptr, 0, sizeof(sync_ptr));
2503         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2504                 return -EFAULT;
2505         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2506                 return -EFAULT;
2507         status = runtime->status;
2508         control = runtime->control;
2509         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2510                 err = snd_pcm_hwsync(substream);
2511                 if (err < 0)
2512                         return err;
2513         }
2514         snd_pcm_stream_lock_irq(substream);
2515         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2516                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2517         else
2518                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2519         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2520                 control->avail_min = sync_ptr.c.control.avail_min;
2521         else
2522                 sync_ptr.c.control.avail_min = control->avail_min;
2523         sync_ptr.s.status.state = status->state;
2524         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2525         sync_ptr.s.status.tstamp = status->tstamp;
2526         sync_ptr.s.status.suspended_state = status->suspended_state;
2527         snd_pcm_stream_unlock_irq(substream);
2528         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2529                 return -EFAULT;
2530         return 0;
2531 }
2532
2533 static int snd_pcm_common_ioctl1(struct file *file,
2534                                  struct snd_pcm_substream *substream,
2535                                  unsigned int cmd, void __user *arg)
2536 {
2537         snd_assert(substream != NULL, return -ENXIO);
2538
2539         switch (cmd) {
2540         case SNDRV_PCM_IOCTL_PVERSION:
2541                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2542         case SNDRV_PCM_IOCTL_INFO:
2543                 return snd_pcm_info_user(substream, arg);
2544         case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2545                 return 0;
2546         case SNDRV_PCM_IOCTL_HW_REFINE:
2547                 return snd_pcm_hw_refine_user(substream, arg);
2548         case SNDRV_PCM_IOCTL_HW_PARAMS:
2549                 return snd_pcm_hw_params_user(substream, arg);
2550         case SNDRV_PCM_IOCTL_HW_FREE:
2551                 return snd_pcm_hw_free(substream);
2552         case SNDRV_PCM_IOCTL_SW_PARAMS:
2553                 return snd_pcm_sw_params_user(substream, arg);
2554         case SNDRV_PCM_IOCTL_STATUS:
2555                 return snd_pcm_status_user(substream, arg);
2556         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2557                 return snd_pcm_channel_info_user(substream, arg);
2558         case SNDRV_PCM_IOCTL_PREPARE:
2559                 return snd_pcm_prepare(substream, file);
2560         case SNDRV_PCM_IOCTL_RESET:
2561                 return snd_pcm_reset(substream);
2562         case SNDRV_PCM_IOCTL_START:
2563                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2564         case SNDRV_PCM_IOCTL_LINK:
2565                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2566         case SNDRV_PCM_IOCTL_UNLINK:
2567                 return snd_pcm_unlink(substream);
2568         case SNDRV_PCM_IOCTL_RESUME:
2569                 return snd_pcm_resume(substream);
2570         case SNDRV_PCM_IOCTL_XRUN:
2571                 return snd_pcm_xrun(substream);
2572         case SNDRV_PCM_IOCTL_HWSYNC:
2573                 return snd_pcm_hwsync(substream);
2574         case SNDRV_PCM_IOCTL_DELAY:
2575                 return snd_pcm_delay(substream, arg);
2576         case SNDRV_PCM_IOCTL_SYNC_PTR:
2577                 return snd_pcm_sync_ptr(substream, arg);
2578 #ifdef CONFIG_SND_SUPPORT_OLD_API
2579         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2580                 return snd_pcm_hw_refine_old_user(substream, arg);
2581         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2582                 return snd_pcm_hw_params_old_user(substream, arg);
2583 #endif
2584         case SNDRV_PCM_IOCTL_DRAIN:
2585                 return snd_pcm_drain(substream);
2586         case SNDRV_PCM_IOCTL_DROP:
2587                 return snd_pcm_drop(substream);
2588         case SNDRV_PCM_IOCTL_PAUSE:
2589         {
2590                 int res;
2591                 snd_pcm_stream_lock_irq(substream);
2592                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2593                 snd_pcm_stream_unlock_irq(substream);
2594                 return res;
2595         }
2596         }
2597         snd_printd("unknown ioctl = 0x%x\n", cmd);
2598         return -ENOTTY;
2599 }
2600
2601 static int snd_pcm_playback_ioctl1(struct file *file,
2602                                    struct snd_pcm_substream *substream,
2603                                    unsigned int cmd, void __user *arg)
2604 {
2605         snd_assert(substream != NULL, return -ENXIO);
2606         snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2607         switch (cmd) {
2608         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2609         {
2610                 struct snd_xferi xferi;
2611                 struct snd_xferi __user *_xferi = arg;
2612                 struct snd_pcm_runtime *runtime = substream->runtime;
2613                 snd_pcm_sframes_t result;
2614                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2615                         return -EBADFD;
2616                 if (put_user(0, &_xferi->result))
2617                         return -EFAULT;
2618                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2619                         return -EFAULT;
2620                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2621                 __put_user(result, &_xferi->result);
2622                 return result < 0 ? result : 0;
2623         }
2624         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2625         {
2626                 struct snd_xfern xfern;
2627                 struct snd_xfern __user *_xfern = arg;
2628                 struct snd_pcm_runtime *runtime = substream->runtime;
2629                 void __user **bufs;
2630                 snd_pcm_sframes_t result;
2631                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2632                         return -EBADFD;
2633                 if (runtime->channels > 128)
2634                         return -EINVAL;
2635                 if (put_user(0, &_xfern->result))
2636                         return -EFAULT;
2637                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2638                         return -EFAULT;
2639                 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2640                 if (bufs == NULL)
2641                         return -ENOMEM;
2642                 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2643                         kfree(bufs);
2644                         return -EFAULT;
2645                 }
2646                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2647                 kfree(bufs);
2648                 __put_user(result, &_xfern->result);
2649                 return result < 0 ? result : 0;
2650         }
2651         case SNDRV_PCM_IOCTL_REWIND:
2652         {
2653                 snd_pcm_uframes_t frames;
2654                 snd_pcm_uframes_t __user *_frames = arg;
2655                 snd_pcm_sframes_t result;
2656                 if (get_user(frames, _frames))
2657                         return -EFAULT;
2658                 if (put_user(0, _frames))
2659                         return -EFAULT;
2660                 result = snd_pcm_playback_rewind(substream, frames);
2661                 __put_user(result, _frames);
2662                 return result < 0 ? result : 0;
2663         }
2664         case SNDRV_PCM_IOCTL_FORWARD:
2665         {
2666                 snd_pcm_uframes_t frames;
2667                 snd_pcm_uframes_t __user *_frames = arg;
2668                 snd_pcm_sframes_t result;
2669                 if (get_user(frames, _frames))
2670                         return -EFAULT;
2671                 if (put_user(0, _frames))
2672                         return -EFAULT;
2673                 result = snd_pcm_playback_forward(substream, frames);
2674                 __put_user(result, _frames);
2675                 return result < 0 ? result : 0;
2676         }
2677         }
2678         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2679 }
2680
2681 static int snd_pcm_capture_ioctl1(struct file *file,
2682                                   struct snd_pcm_substream *substream,
2683                                   unsigned int cmd, void __user *arg)
2684 {
2685         snd_assert(substream != NULL, return -ENXIO);
2686         snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2687         switch (cmd) {
2688         case SNDRV_PCM_IOCTL_READI_FRAMES:
2689         {
2690                 struct snd_xferi xferi;
2691                 struct snd_xferi __user *_xferi = arg;
2692                 struct snd_pcm_runtime *runtime = substream->runtime;
2693                 snd_pcm_sframes_t result;
2694                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2695                         return -EBADFD;
2696                 if (put_user(0, &_xferi->result))
2697                         return -EFAULT;
2698                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2699                         return -EFAULT;
2700                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2701                 __put_user(result, &_xferi->result);
2702                 return result < 0 ? result : 0;
2703         }
2704         case SNDRV_PCM_IOCTL_READN_FRAMES:
2705         {
2706                 struct snd_xfern xfern;
2707                 struct snd_xfern __user *_xfern = arg;
2708                 struct snd_pcm_runtime *runtime = substream->runtime;
2709                 void *bufs;
2710                 snd_pcm_sframes_t result;
2711                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2712                         return -EBADFD;
2713                 if (runtime->channels > 128)
2714                         return -EINVAL;
2715                 if (put_user(0, &_xfern->result))
2716                         return -EFAULT;
2717                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2718                         return -EFAULT;
2719                 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2720                 if (bufs == NULL)
2721                         return -ENOMEM;
2722                 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2723                         kfree(bufs);
2724                         return -EFAULT;
2725                 }
2726                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2727                 kfree(bufs);
2728                 __put_user(result, &_xfern->result);
2729                 return result < 0 ? result : 0;
2730         }
2731         case SNDRV_PCM_IOCTL_REWIND:
2732         {
2733                 snd_pcm_uframes_t frames;
2734                 snd_pcm_uframes_t __user *_frames = arg;
2735                 snd_pcm_sframes_t result;
2736                 if (get_user(frames, _frames))
2737                         return -EFAULT;
2738                 if (put_user(0, _frames))
2739                         return -EFAULT;
2740                 result = snd_pcm_capture_rewind(substream, frames);
2741                 __put_user(result, _frames);
2742                 return result < 0 ? result : 0;
2743         }
2744         case SNDRV_PCM_IOCTL_FORWARD:
2745         {
2746                 snd_pcm_uframes_t frames;
2747                 snd_pcm_uframes_t __user *_frames = arg;
2748                 snd_pcm_sframes_t result;
2749                 if (get_user(frames, _frames))
2750                         return -EFAULT;
2751                 if (put_user(0, _frames))
2752                         return -EFAULT;
2753                 result = snd_pcm_capture_forward(substream, frames);
2754                 __put_user(result, _frames);
2755                 return result < 0 ? result : 0;
2756         }
2757         }
2758         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2759 }
2760
2761 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2762                                    unsigned long arg)
2763 {
2764         struct snd_pcm_file *pcm_file;
2765
2766         pcm_file = file->private_data;
2767
2768         if (((cmd >> 8) & 0xff) != 'A')
2769                 return -ENOTTY;
2770
2771         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2772                                        (void __user *)arg);
2773 }
2774
2775 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2776                                   unsigned long arg)
2777 {
2778         struct snd_pcm_file *pcm_file;
2779
2780         pcm_file = file->private_data;
2781
2782         if (((cmd >> 8) & 0xff) != 'A')
2783                 return -ENOTTY;
2784
2785         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2786                                       (void __user *)arg);
2787 }
2788
2789 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2790                          unsigned int cmd, void *arg)
2791 {
2792         mm_segment_t fs;
2793         int result;
2794
2795         fs = snd_enter_user();
2796         switch (substream->stream) {
2797         case SNDRV_PCM_STREAM_PLAYBACK:
2798                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2799                                                  (void __user *)arg);
2800                 break;
2801         case SNDRV_PCM_STREAM_CAPTURE:
2802                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2803                                                 (void __user *)arg);
2804                 break;
2805         default:
2806                 result = -EINVAL;
2807                 break;
2808         }
2809         snd_leave_user(fs);
2810         return result;
2811 }
2812
2813 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2814
2815 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2816                             loff_t * offset)
2817 {
2818         struct snd_pcm_file *pcm_file;
2819         struct snd_pcm_substream *substream;
2820         struct snd_pcm_runtime *runtime;
2821         snd_pcm_sframes_t result;
2822
2823         pcm_file = file->private_data;
2824         substream = pcm_file->substream;
2825         snd_assert(substream != NULL, return -ENXIO);
2826         runtime = substream->runtime;
2827         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2828                 return -EBADFD;
2829         if (!frame_aligned(runtime, count))
2830                 return -EINVAL;
2831         count = bytes_to_frames(runtime, count);
2832         result = snd_pcm_lib_read(substream, buf, count);
2833         if (result > 0)
2834                 result = frames_to_bytes(runtime, result);
2835         return result;
2836 }
2837
2838 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2839                              size_t count, loff_t * offset)
2840 {
2841         struct snd_pcm_file *pcm_file;
2842         struct snd_pcm_substream *substream;
2843         struct snd_pcm_runtime *runtime;
2844         snd_pcm_sframes_t result;
2845
2846         pcm_file = file->private_data;
2847         substream = pcm_file->substream;
2848         snd_assert(substream != NULL, result = -ENXIO; goto end);
2849         runtime = substream->runtime;
2850         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2851                 result = -EBADFD;
2852                 goto end;
2853         }
2854         if (!frame_aligned(runtime, count)) {
2855                 result = -EINVAL;
2856                 goto end;
2857         }
2858         count = bytes_to_frames(runtime, count);
2859         result = snd_pcm_lib_write(substream, buf, count);
2860         if (result > 0)
2861                 result = frames_to_bytes(runtime, result);
2862  end:
2863         return result;
2864 }
2865
2866 static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector,
2867                              unsigned long count, loff_t * offset)
2868
2869 {
2870         struct snd_pcm_file *pcm_file;
2871         struct snd_pcm_substream *substream;
2872         struct snd_pcm_runtime *runtime;
2873         snd_pcm_sframes_t result;
2874         unsigned long i;
2875         void __user **bufs;
2876         snd_pcm_uframes_t frames;
2877
2878         pcm_file = file->private_data;
2879         substream = pcm_file->substream;
2880         snd_assert(substream != NULL, return -ENXIO);
2881         runtime = substream->runtime;
2882         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2883                 return -EBADFD;
2884         if (count > 1024 || count != runtime->channels)
2885                 return -EINVAL;
2886         if (!frame_aligned(runtime, _vector->iov_len))
2887                 return -EINVAL;
2888         frames = bytes_to_samples(runtime, _vector->iov_len);
2889         bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2890         if (bufs == NULL)
2891                 return -ENOMEM;
2892         for (i = 0; i < count; ++i)
2893                 bufs[i] = _vector[i].iov_base;
2894         result = snd_pcm_lib_readv(substream, bufs, frames);
2895         if (result > 0)
2896                 result = frames_to_bytes(runtime, result);
2897         kfree(bufs);
2898         return result;
2899 }
2900
2901 static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector,
2902                               unsigned long count, loff_t * offset)
2903 {
2904         struct snd_pcm_file *pcm_file;
2905         struct snd_pcm_substream *substream;
2906         struct snd_pcm_runtime *runtime;
2907         snd_pcm_sframes_t result;
2908         unsigned long i;
2909         void __user **bufs;
2910         snd_pcm_uframes_t frames;
2911
2912         pcm_file = file->private_data;
2913         substream = pcm_file->substream;
2914         snd_assert(substream != NULL, result = -ENXIO; goto end);
2915         runtime = substream->runtime;
2916         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2917                 result = -EBADFD;
2918                 goto end;
2919         }
2920         if (count > 128 || count != runtime->channels ||
2921             !frame_aligned(runtime, _vector->iov_len)) {
2922                 result = -EINVAL;
2923                 goto end;
2924         }
2925         frames = bytes_to_samples(runtime, _vector->iov_len);
2926         bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2927         if (bufs == NULL)
2928                 return -ENOMEM;
2929         for (i = 0; i < count; ++i)
2930                 bufs[i] = _vector[i].iov_base;
2931         result = snd_pcm_lib_writev(substream, bufs, frames);
2932         if (result > 0)
2933                 result = frames_to_bytes(runtime, result);
2934         kfree(bufs);
2935  end:
2936         return result;
2937 }
2938
2939 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2940 {
2941         struct snd_pcm_file *pcm_file;
2942         struct snd_pcm_substream *substream;
2943         struct snd_pcm_runtime *runtime;
2944         unsigned int mask;
2945         snd_pcm_uframes_t avail;
2946
2947         pcm_file = file->private_data;
2948
2949         substream = pcm_file->substream;
2950         snd_assert(substream != NULL, return -ENXIO);
2951         runtime = substream->runtime;
2952
2953         poll_wait(file, &runtime->sleep, wait);
2954
2955         snd_pcm_stream_lock_irq(substream);
2956         avail = snd_pcm_playback_avail(runtime);
2957         switch (runtime->status->state) {
2958         case SNDRV_PCM_STATE_RUNNING:
2959         case SNDRV_PCM_STATE_PREPARED:
2960         case SNDRV_PCM_STATE_PAUSED:
2961                 if (avail >= runtime->control->avail_min) {
2962                         mask = POLLOUT | POLLWRNORM;
2963                         break;
2964                 }
2965                 /* Fall through */
2966         case SNDRV_PCM_STATE_DRAINING:
2967                 mask = 0;
2968                 break;
2969         default:
2970                 mask = POLLOUT | POLLWRNORM | POLLERR;
2971                 break;
2972         }
2973         snd_pcm_stream_unlock_irq(substream);
2974         return mask;
2975 }
2976
2977 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2978 {
2979         struct snd_pcm_file *pcm_file;
2980         struct snd_pcm_substream *substream;
2981         struct snd_pcm_runtime *runtime;
2982         unsigned int mask;
2983         snd_pcm_uframes_t avail;
2984
2985         pcm_file = file->private_data;
2986
2987         substream = pcm_file->substream;
2988         snd_assert(substream != NULL, return -ENXIO);
2989         runtime = substream->runtime;
2990
2991         poll_wait(file, &runtime->sleep, wait);
2992
2993         snd_pcm_stream_lock_irq(substream);
2994         avail = snd_pcm_capture_avail(runtime);
2995         switch (runtime->status->state) {
2996         case SNDRV_PCM_STATE_RUNNING:
2997         case SNDRV_PCM_STATE_PREPARED:
2998         case SNDRV_PCM_STATE_PAUSED:
2999                 if (avail >= runtime->control->avail_min) {
3000                         mask = POLLIN | POLLRDNORM;
3001                         break;
3002                 }
3003                 mask = 0;
3004                 break;
3005         case SNDRV_PCM_STATE_DRAINING:
3006                 if (avail > 0) {
3007                         mask = POLLIN | POLLRDNORM;
3008                         break;
3009                 }
3010                 /* Fall through */
3011         default:
3012                 mask = POLLIN | POLLRDNORM | POLLERR;
3013                 break;
3014         }
3015         snd_pcm_stream_unlock_irq(substream);
3016         return mask;
3017 }
3018
3019 /*
3020  * mmap support
3021  */
3022
3023 /*
3024  * Only on coherent architectures, we can mmap the status and the control records
3025  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
3026  */
3027 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3028 /*
3029  * mmap status record
3030  */
3031 static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area,
3032                                                 unsigned long address, int *type)
3033 {
3034         struct snd_pcm_substream *substream = area->vm_private_data;
3035         struct snd_pcm_runtime *runtime;
3036         struct page * page;
3037
3038         if (substream == NULL)
3039                 return NOPAGE_OOM;
3040         runtime = substream->runtime;
3041         page = virt_to_page(runtime->status);
3042         get_page(page);
3043         if (type)
3044                 *type = VM_FAULT_MINOR;
3045         return page;
3046 }
3047
3048 static struct vm_operations_struct snd_pcm_vm_ops_status =
3049 {
3050         .nopage =       snd_pcm_mmap_status_nopage,
3051 };
3052
3053 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3054                                struct vm_area_struct *area)
3055 {
3056         struct snd_pcm_runtime *runtime;
3057         long size;
3058         if (!(area->vm_flags & VM_READ))
3059                 return -EINVAL;
3060         runtime = substream->runtime;
3061         snd_assert(runtime != NULL, return -EAGAIN);
3062         size = area->vm_end - area->vm_start;
3063         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3064                 return -EINVAL;
3065         area->vm_ops = &snd_pcm_vm_ops_status;
3066         area->vm_private_data = substream;
3067         area->vm_flags |= VM_RESERVED;
3068         return 0;
3069 }
3070
3071 /*
3072  * mmap control record
3073  */
3074 static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area,
3075                                                  unsigned long address, int *type)
3076 {
3077         struct snd_pcm_substream *substream = area->vm_private_data;
3078         struct snd_pcm_runtime *runtime;
3079         struct page * page;
3080
3081         if (substream == NULL)
3082                 return NOPAGE_OOM;
3083         runtime = substream->runtime;
3084         page = virt_to_page(runtime->control);
3085         get_page(page);
3086         if (type)
3087                 *type = VM_FAULT_MINOR;
3088         return page;
3089 }
3090
3091 static struct vm_operations_struct snd_pcm_vm_ops_control =
3092 {
3093         .nopage =       snd_pcm_mmap_control_nopage,
3094 };
3095
3096 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3097                                 struct vm_area_struct *area)
3098 {
3099         struct snd_pcm_runtime *runtime;
3100         long size;
3101         if (!(area->vm_flags & VM_READ))
3102                 return -EINVAL;
3103         runtime = substream->runtime;
3104         snd_assert(runtime != NULL, return -EAGAIN);
3105         size = area->vm_end - area->vm_start;
3106         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3107                 return -EINVAL;
3108         area->vm_ops = &snd_pcm_vm_ops_control;
3109         area->vm_private_data = substream;
3110         area->vm_flags |= VM_RESERVED;
3111         return 0;
3112 }
3113 #else /* ! coherent mmap */
3114 /*
3115  * don't support mmap for status and control records.
3116  */
3117 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3118                                struct vm_area_struct *area)
3119 {
3120         return -ENXIO;
3121 }
3122 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3123                                 struct vm_area_struct *area)
3124 {
3125         return -ENXIO;
3126 }
3127 #endif /* coherent mmap */
3128
3129 /*
3130  * nopage callback for mmapping a RAM page
3131  */
3132 static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area,
3133                                              unsigned long address, int *type)
3134 {
3135         struct snd_pcm_substream *substream = area->vm_private_data;
3136         struct snd_pcm_runtime *runtime;
3137         unsigned long offset;
3138         struct page * page;
3139         void *vaddr;
3140         size_t dma_bytes;
3141
3142         if (substream == NULL)
3143                 return NOPAGE_OOM;
3144         runtime = substream->runtime;
3145         offset = area->vm_pgoff << PAGE_SHIFT;
3146         offset += address - area->vm_start;
3147         snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
3148         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3149         if (offset > dma_bytes - PAGE_SIZE)
3150                 return NOPAGE_SIGBUS;
3151         if (substream->ops->page) {
3152                 page = substream->ops->page(substream, offset);
3153                 if (! page)
3154                         return NOPAGE_OOM;
3155         } else {
3156                 vaddr = runtime->dma_area + offset;
3157                 page = virt_to_page(vaddr);
3158         }
3159         get_page(page);
3160         if (type)
3161                 *type = VM_FAULT_MINOR;
3162         return page;
3163 }
3164
3165 static struct vm_operations_struct snd_pcm_vm_ops_data =
3166 {
3167         .open =         snd_pcm_mmap_data_open,
3168         .close =        snd_pcm_mmap_data_close,
3169         .nopage =       snd_pcm_mmap_data_nopage,
3170 };
3171
3172 /*
3173  * mmap the DMA buffer on RAM
3174  */
3175 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3176                                 struct vm_area_struct *area)
3177 {
3178         area->vm_ops = &snd_pcm_vm_ops_data;
3179         area->vm_private_data = substream;
3180         area->vm_flags |= VM_RESERVED;
3181         atomic_inc(&substream->runtime->mmap_count);
3182         return 0;
3183 }
3184
3185 /*
3186  * mmap the DMA buffer on I/O memory area
3187  */
3188 #if SNDRV_PCM_INFO_MMAP_IOMEM
3189 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3190 {
3191         .open =         snd_pcm_mmap_data_open,
3192         .close =        snd_pcm_mmap_data_close,
3193 };
3194
3195 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3196                            struct vm_area_struct *area)
3197 {
3198         long size;
3199         unsigned long offset;
3200
3201 #ifdef pgprot_noncached
3202         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3203 #endif
3204         area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3205         area->vm_private_data = substream;
3206         area->vm_flags |= VM_IO;
3207         size = area->vm_end - area->vm_start;
3208         offset = area->vm_pgoff << PAGE_SHIFT;
3209         if (io_remap_pfn_range(area, area->vm_start,
3210                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3211                                 size, area->vm_page_prot))
3212                 return -EAGAIN;
3213         atomic_inc(&substream->runtime->mmap_count);
3214         return 0;
3215 }
3216
3217 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3218 #endif /* SNDRV_PCM_INFO_MMAP */
3219
3220 /*
3221  * mmap DMA buffer
3222  */
3223 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3224                       struct vm_area_struct *area)
3225 {
3226         struct snd_pcm_runtime *runtime;
3227         long size;
3228         unsigned long offset;
3229         size_t dma_bytes;
3230
3231         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3232                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3233                         return -EINVAL;
3234         } else {
3235                 if (!(area->vm_flags & VM_READ))
3236                         return -EINVAL;
3237         }
3238         runtime = substream->runtime;
3239         snd_assert(runtime != NULL, return -EAGAIN);
3240         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3241                 return -EBADFD;
3242         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3243                 return -ENXIO;
3244         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3245             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3246                 return -EINVAL;
3247         size = area->vm_end - area->vm_start;
3248         offset = area->vm_pgoff << PAGE_SHIFT;
3249         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3250         if ((size_t)size > dma_bytes)
3251                 return -EINVAL;
3252         if (offset > dma_bytes - size)
3253                 return -EINVAL;
3254
3255         if (substream->ops->mmap)
3256                 return substream->ops->mmap(substream, area);
3257         else
3258                 return snd_pcm_default_mmap(substream, area);
3259 }
3260
3261 EXPORT_SYMBOL(snd_pcm_mmap_data);
3262
3263 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3264 {
3265         struct snd_pcm_file * pcm_file;
3266         struct snd_pcm_substream *substream;
3267         unsigned long offset;
3268
3269         pcm_file = file->private_data;
3270         substream = pcm_file->substream;
3271         snd_assert(substream != NULL, return -ENXIO);
3272
3273         offset = area->vm_pgoff << PAGE_SHIFT;
3274         switch (offset) {
3275         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3276                 if (substream->no_mmap_ctrl)
3277                         return -ENXIO;
3278                 return snd_pcm_mmap_status(substream, file, area);
3279         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3280                 if (substream->no_mmap_ctrl)
3281                         return -ENXIO;
3282                 return snd_pcm_mmap_control(substream, file, area);
3283         default:
3284                 return snd_pcm_mmap_data(substream, file, area);
3285         }
3286         return 0;
3287 }
3288
3289 static int snd_pcm_fasync(int fd, struct file * file, int on)
3290 {
3291         struct snd_pcm_file * pcm_file;
3292         struct snd_pcm_substream *substream;
3293         struct snd_pcm_runtime *runtime;
3294         int err;
3295
3296         pcm_file = file->private_data;
3297         substream = pcm_file->substream;
3298         snd_assert(substream != NULL, return -ENXIO);
3299         runtime = substream->runtime;
3300
3301         err = fasync_helper(fd, file, on, &runtime->fasync);
3302         if (err < 0)
3303                 return err;
3304         return 0;
3305 }
3306
3307 /*
3308  * ioctl32 compat
3309  */
3310 #ifdef CONFIG_COMPAT
3311 #include "pcm_compat.c"
3312 #else
3313 #define snd_pcm_ioctl_compat    NULL
3314 #endif
3315
3316 /*
3317  *  To be removed helpers to keep binary compatibility
3318  */
3319
3320 #ifdef CONFIG_SND_SUPPORT_OLD_API
3321 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3322 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3323
3324 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3325                                                struct snd_pcm_hw_params_old *oparams)
3326 {
3327         unsigned int i;
3328
3329         memset(params, 0, sizeof(*params));
3330         params->flags = oparams->flags;
3331         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3332                 params->masks[i].bits[0] = oparams->masks[i];
3333         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3334         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3335         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3336         params->info = oparams->info;
3337         params->msbits = oparams->msbits;
3338         params->rate_num = oparams->rate_num;
3339         params->rate_den = oparams->rate_den;
3340         params->fifo_size = oparams->fifo_size;
3341 }
3342
3343 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3344                                              struct snd_pcm_hw_params *params)
3345 {
3346         unsigned int i;
3347
3348         memset(oparams, 0, sizeof(*oparams));
3349         oparams->flags = params->flags;
3350         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3351                 oparams->masks[i] = params->masks[i].bits[0];
3352         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3353         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3354         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3355         oparams->info = params->info;
3356         oparams->msbits = params->msbits;
3357         oparams->rate_num = params->rate_num;
3358         oparams->rate_den = params->rate_den;
3359         oparams->fifo_size = params->fifo_size;
3360 }
3361
3362 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3363                                       struct snd_pcm_hw_params_old __user * _oparams)
3364 {
3365         struct snd_pcm_hw_params *params;
3366         struct snd_pcm_hw_params_old *oparams = NULL;
3367         int err;
3368
3369         params = kmalloc(sizeof(*params), GFP_KERNEL);
3370         if (!params) {
3371                 err = -ENOMEM;
3372                 goto out;
3373         }
3374         oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3375         if (!oparams) {
3376                 err = -ENOMEM;
3377                 goto out;
3378         }
3379
3380         if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3381                 err = -EFAULT;
3382                 goto out;
3383         }
3384         snd_pcm_hw_convert_from_old_params(params, oparams);
3385         err = snd_pcm_hw_refine(substream, params);
3386         snd_pcm_hw_convert_to_old_params(oparams, params);
3387         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3388                 if (!err)
3389                         err = -EFAULT;
3390         }
3391 out:
3392         kfree(params);
3393         kfree(oparams);
3394         return err;
3395 }
3396
3397 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3398                                       struct snd_pcm_hw_params_old __user * _oparams)
3399 {
3400         struct snd_pcm_hw_params *params;
3401         struct snd_pcm_hw_params_old *oparams = NULL;
3402         int err;
3403
3404         params = kmalloc(sizeof(*params), GFP_KERNEL);
3405         if (!params) {
3406                 err = -ENOMEM;
3407                 goto out;
3408         }
3409         oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3410         if (!oparams) {
3411                 err = -ENOMEM;
3412                 goto out;
3413         }
3414         if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3415                 err = -EFAULT;
3416                 goto out;
3417         }
3418         snd_pcm_hw_convert_from_old_params(params, oparams);
3419         err = snd_pcm_hw_params(substream, params);
3420         snd_pcm_hw_convert_to_old_params(oparams, params);
3421         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3422                 if (!err)
3423                         err = -EFAULT;
3424         }
3425 out:
3426         kfree(params);
3427         kfree(oparams);
3428         return err;
3429 }
3430 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3431
3432 /*
3433  *  Register section
3434  */
3435
3436 struct file_operations snd_pcm_f_ops[2] = {
3437         {
3438                 .owner =                THIS_MODULE,
3439                 .write =                snd_pcm_write,
3440                 .writev =               snd_pcm_writev,
3441                 .open =                 snd_pcm_playback_open,
3442                 .release =              snd_pcm_release,
3443                 .poll =                 snd_pcm_playback_poll,
3444                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3445                 .compat_ioctl =         snd_pcm_ioctl_compat,
3446                 .mmap =                 snd_pcm_mmap,
3447                 .fasync =               snd_pcm_fasync,
3448         },
3449         {
3450                 .owner =                THIS_MODULE,
3451                 .read =                 snd_pcm_read,
3452                 .readv =                snd_pcm_readv,
3453                 .open =                 snd_pcm_capture_open,
3454                 .release =              snd_pcm_release,
3455                 .poll =                 snd_pcm_capture_poll,
3456                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3457                 .compat_ioctl =         snd_pcm_ioctl_compat,
3458                 .mmap =                 snd_pcm_mmap,
3459                 .fasync =               snd_pcm_fasync,
3460         }
3461 };