sound/core/pcm_native.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer
   3  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include <sound/driver.h>
  23 #include <linux/mm.h>
  24 #include <linux/smp_lock.h>
  25 #include <linux/file.h>
  26 #include <linux/slab.h>
  27 #include <linux/time.h>
  28 #include <linux/uio.h>
  29 #include <sound/core.h>
  30 #include <sound/control.h>
  31 #include <sound/info.h>
  32 #include <sound/pcm.h>
  33 #include <sound/pcm_params.h>
  34 #include <sound/timer.h>
  35 #include <sound/minors.h>
  36 #include <asm/io.h>
  37
  38 /*
  39  *  Compatibility
  40  */
  41
  42 struct snd_pcm_hw_params_old {
  43         unsigned int flags;
  44         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
  45                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
  46         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
  47                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
  48         unsigned int rmask;
  49         unsigned int cmask;
  50         unsigned int info;
  51         unsigned int msbits;
  52         unsigned int rate_num;
  53         unsigned int rate_den;
  54         snd_pcm_uframes_t fifo_size;
  55         unsigned char reserved[64];
  56 };
  57
  58 #ifdef CONFIG_SND_SUPPORT_OLD_API
  59 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
  60 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
  61
  62 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
  63                                       struct snd_pcm_hw_params_old __user * _oparams);
  64 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
  65                                       struct snd_pcm_hw_params_old __user * _oparams);
  66 #endif
  67 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
  68
  69 /*
  70  *
  71  */
  72
  73 DEFINE_RWLOCK(snd_pcm_link_rwlock);
  74 EXPORT_SYMBOL(snd_pcm_link_rwlock);
  75
  76 static DECLARE_RWSEM(snd_pcm_link_rwsem);
  77
  78 static inline mm_segment_t snd_enter_user(void)
  79 {
  80         mm_segment_t fs = get_fs();
  81         set_fs(get_ds());
  82         return fs;
  83 }
  84
  85 static inline void snd_leave_user(mm_segment_t fs)
  86 {
  87         set_fs(fs);
  88 }
  89
  90
  91
  92 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
  93 {
  94         struct snd_pcm_runtime *runtime;
  95         struct snd_pcm *pcm = substream->pcm;
  96         struct snd_pcm_str *pstr = substream->pstr;
  97
  98         snd_assert(substream != NULL, return -ENXIO);
  99         memset(info, 0, sizeof(*info));
 100         info->card = pcm->card->number;
 101         info->device = pcm->device;
 102         info->stream = substream->stream;
 103         info->subdevice = substream->number;
 104         strlcpy(info->id, pcm->id, sizeof(info->id));
 105         strlcpy(info->name, pcm->name, sizeof(info->name));
 106         info->dev_class = pcm->dev_class;
 107         info->dev_subclass = pcm->dev_subclass;
 108         info->subdevices_count = pstr->substream_count;
 109         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 110         strlcpy(info->subname, substream->name, sizeof(info->subname));
 111         runtime = substream->runtime;
 112         /* AB: FIXME!!! This is definitely nonsense */
 113         if (runtime) {
 114                 info->sync = runtime->sync;
 115                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
 116         }
 117         return 0;
 118 }
 119
 120 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 121                       struct snd_pcm_info __user * _info)
 122 {
 123         struct snd_pcm_info *info;
 124         int err;
 125
 126         info = kmalloc(sizeof(*info), GFP_KERNEL);
 127         if (! info)
 128                 return -ENOMEM;
 129         err = snd_pcm_info(substream, info);
 130         if (err >= 0) {
 131                 if (copy_to_user(_info, info, sizeof(*info)))
 132                         err = -EFAULT;
 133         }
 134         kfree(info);
 135         return err;
 136 }
 137
 138 #undef RULES_DEBUG
 139
 140 #ifdef RULES_DEBUG
 141 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
 142 char *snd_pcm_hw_param_names[] = {
 143         HW_PARAM(ACCESS),
 144         HW_PARAM(FORMAT),
 145         HW_PARAM(SUBFORMAT),
 146         HW_PARAM(SAMPLE_BITS),
 147         HW_PARAM(FRAME_BITS),
 148         HW_PARAM(CHANNELS),
 149         HW_PARAM(RATE),
 150         HW_PARAM(PERIOD_TIME),
 151         HW_PARAM(PERIOD_SIZE),
 152         HW_PARAM(PERIOD_BYTES),
 153         HW_PARAM(PERIODS),
 154         HW_PARAM(BUFFER_TIME),
 155         HW_PARAM(BUFFER_SIZE),
 156         HW_PARAM(BUFFER_BYTES),
 157         HW_PARAM(TICK_TIME),
 158 };
 159 #endif
 160
 161 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
 162                       struct snd_pcm_hw_params *params)
 163 {
 164         unsigned int k;
 165         struct snd_pcm_hardware *hw;
 166         struct snd_interval *i = NULL;
 167         struct snd_mask *m = NULL;
 168         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
 169         unsigned int rstamps[constrs->rules_num];
 170         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 171         unsigned int stamp = 2;
 172         int changed, again;
 173
 174         params->info = 0;
 175         params->fifo_size = 0;
 176         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
 177                 params->msbits = 0;
 178         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
 179                 params->rate_num = 0;
 180                 params->rate_den = 0;
 181         }
 182
 183         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
 184                 m = hw_param_mask(params, k);
 185                 if (snd_mask_empty(m))
 186                         return -EINVAL;
 187                 if (!(params->rmask & (1 << k)))
 188                         continue;
 189 #ifdef RULES_DEBUG
 190                 printk("%s = ", snd_pcm_hw_param_names[k]);
 191                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 192 #endif
 193                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
 194 #ifdef RULES_DEBUG
 195                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 196 #endif
 197                 if (changed)
 198                         params->cmask |= 1 << k;
 199                 if (changed < 0)
 200                         return changed;
 201         }
 202
 203         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
 204                 i = hw_param_interval(params, k);
 205                 if (snd_interval_empty(i))
 206                         return -EINVAL;
 207                 if (!(params->rmask & (1 << k)))
 208                         continue;
 209 #ifdef RULES_DEBUG
 210                 printk("%s = ", snd_pcm_hw_param_names[k]);
 211                 if (i->empty)
 212                         printk("empty");
 213                 else
 214                         printk("%c%u %u%c",
 215                                i->openmin ? '(' : '[', i->min,
 216                                i->max, i->openmax ? ')' : ']');
 217                 printk(" -> ");
 218 #endif
 219                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
 220 #ifdef RULES_DEBUG
 221                 if (i->empty)
 222                         printk("empty\n");
 223                 else
 224                         printk("%c%u %u%c\n",
 225                                i->openmin ? '(' : '[', i->min,
 226                                i->max, i->openmax ? ')' : ']');
 227 #endif
 228                 if (changed)
 229                         params->cmask |= 1 << k;
 230                 if (changed < 0)
 231                         return changed;
 232         }
 233
 234         for (k = 0; k < constrs->rules_num; k++)
 235                 rstamps[k] = 0;
 236         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
 237                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
 238         do {
 239                 again = 0;
 240                 for (k = 0; k < constrs->rules_num; k++) {
 241                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
 242                         unsigned int d;
 243                         int doit = 0;
 244                         if (r->cond && !(r->cond & params->flags))
 245                                 continue;
 246                         for (d = 0; r->deps[d] >= 0; d++) {
 247                                 if (vstamps[r->deps[d]] > rstamps[k]) {
 248                                         doit = 1;
 249                                         break;
 250                                 }
 251                         }
 252                         if (!doit)
 253                                 continue;
 254 #ifdef RULES_DEBUG
 255                         printk("Rule %d [%p]: ", k, r->func);
 256                         if (r->var >= 0) {
 257                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
 258                                 if (hw_is_mask(r->var)) {
 259                                         m = hw_param_mask(params, r->var);
 260                                         printk("%x", *m->bits);
 261                                 } else {
 262                                         i = hw_param_interval(params, r->var);
 263                                         if (i->empty)
 264                                                 printk("empty");
 265                                         else
 266                                                 printk("%c%u %u%c",
 267                                                        i->openmin ? '(' : '[', i->min,
 268                                                        i->max, i->openmax ? ')' : ']');
 269                                 }
 270                         }
 271 #endif
 272                         changed = r->func(params, r);
 273 #ifdef RULES_DEBUG
 274                         if (r->var >= 0) {
 275                                 printk(" -> ");
 276                                 if (hw_is_mask(r->var))
 277                                         printk("%x", *m->bits);
 278                                 else {
 279                                         if (i->empty)
 280                                                 printk("empty");
 281                                         else
 282                                                 printk("%c%u %u%c",
 283                                                        i->openmin ? '(' : '[', i->min,
 284                                                        i->max, i->openmax ? ')' : ']');
 285                                 }
 286                         }
 287                         printk("\n");
 288 #endif
 289                         rstamps[k] = stamp;
 290                         if (changed && r->var >= 0) {
 291                                 params->cmask |= (1 << r->var);
 292                                 vstamps[r->var] = stamp;
 293                                 again = 1;
 294                         }
 295                         if (changed < 0)
 296                                 return changed;
 297                         stamp++;
 298                 }
 299         } while (again);
 300         if (!params->msbits) {
 301                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
 302                 if (snd_interval_single(i))
 303                         params->msbits = snd_interval_value(i);
 304         }
 305
 306         if (!params->rate_den) {
 307                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 308                 if (snd_interval_single(i)) {
 309                         params->rate_num = snd_interval_value(i);
 310                         params->rate_den = 1;
 311                 }
 312         }
 313
 314         hw = &substream->runtime->hw;
 315         if (!params->info)
 316                 params->info = hw->info;
 317         if (!params->fifo_size)
 318                 params->fifo_size = hw->fifo_size;
 319         params->rmask = 0;
 320         return 0;
 321 }
 322
 323 EXPORT_SYMBOL(snd_pcm_hw_refine);
 324
 325 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 326                                   struct snd_pcm_hw_params __user * _params)
 327 {
 328         struct snd_pcm_hw_params *params;
 329         int err;
 330
 331         params = kmalloc(sizeof(*params), GFP_KERNEL);
 332         if (!params) {
 333                 err = -ENOMEM;
 334                 goto out;
 335         }
 336         if (copy_from_user(params, _params, sizeof(*params))) {
 337                 err = -EFAULT;
 338                 goto out;
 339         }
 340         err = snd_pcm_hw_refine(substream, params);
 341         if (copy_to_user(_params, params, sizeof(*params))) {
 342                 if (!err)
 343                         err = -EFAULT;
 344         }
 345 out:
 346         kfree(params);
 347         return err;
 348 }
 349
 350 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 351                              struct snd_pcm_hw_params *params)
 352 {
 353         struct snd_pcm_runtime *runtime;
 354         int err;
 355         unsigned int bits;
 356         snd_pcm_uframes_t frames;
 357
 358         snd_assert(substream != NULL, return -ENXIO);
 359         runtime = substream->runtime;
 360         snd_assert(runtime != NULL, return -ENXIO);
 361         snd_pcm_stream_lock_irq(substream);
 362         switch (runtime->status->state) {
 363         case SNDRV_PCM_STATE_OPEN:
 364         case SNDRV_PCM_STATE_SETUP:
 365         case SNDRV_PCM_STATE_PREPARED:
 366                 break;
 367         default:
 368                 snd_pcm_stream_unlock_irq(substream);
 369                 return -EBADFD;
 370         }
 371         snd_pcm_stream_unlock_irq(substream);
 372 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 373         if (!substream->oss.oss)
 374 #endif
 375                 if (atomic_read(&substream->mmap_count))
 376                         return -EBADFD;
 377
 378         params->rmask = ~0U;
 379         err = snd_pcm_hw_refine(substream, params);
 380         if (err < 0)
 381                 goto _error;
 382
 383         err = snd_pcm_hw_params_choose(substream, params);
 384         if (err < 0)
 385                 goto _error;
 386
 387         if (substream->ops->hw_params != NULL) {
 388                 err = substream->ops->hw_params(substream, params);
 389                 if (err < 0)
 390                         goto _error;
 391         }
 392
 393         runtime->access = params_access(params);
 394         runtime->format = params_format(params);
 395         runtime->subformat = params_subformat(params);
 396         runtime->channels = params_channels(params);
 397         runtime->rate = params_rate(params);
 398         runtime->period_size = params_period_size(params);
 399         runtime->periods = params_periods(params);
 400         runtime->buffer_size = params_buffer_size(params);
 401         runtime->tick_time = params_tick_time(params);
 402         runtime->info = params->info;
 403         runtime->rate_num = params->rate_num;
 404         runtime->rate_den = params->rate_den;
 405
 406         bits = snd_pcm_format_physical_width(runtime->format);
 407         runtime->sample_bits = bits;
 408         bits *= runtime->channels;
 409         runtime->frame_bits = bits;
 410         frames = 1;
 411         while (bits % 8 != 0) {
 412                 bits *= 2;
 413                 frames *= 2;
 414         }
 415         runtime->byte_align = bits / 8;
 416         runtime->min_align = frames;
 417
 418         /* Default sw params */
 419         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 420         runtime->period_step = 1;
 421         runtime->sleep_min = 0;
 422         runtime->control->avail_min = runtime->period_size;
 423         runtime->xfer_align = runtime->period_size;
 424         runtime->start_threshold = 1;
 425         runtime->stop_threshold = runtime->buffer_size;
 426         runtime->silence_threshold = 0;
 427         runtime->silence_size = 0;
 428         runtime->boundary = runtime->buffer_size;
 429         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 430                 runtime->boundary *= 2;
 431
 432         snd_pcm_timer_resolution_change(substream);
 433         runtime->status->state = SNDRV_PCM_STATE_SETUP;
 434         return 0;
 435  _error:
 436         /* hardware might be unuseable from this time,
 437            so we force application to retry to set
 438            the correct hardware parameter settings */
 439         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 440         if (substream->ops->hw_free != NULL)
 441                 substream->ops->hw_free(substream);
 442         return err;
 443 }
 444
 445 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 446                                   struct snd_pcm_hw_params __user * _params)
 447 {
 448         struct snd_pcm_hw_params *params;
 449         int err;
 450
 451         params = kmalloc(sizeof(*params), GFP_KERNEL);
 452         if (!params) {
 453                 err = -ENOMEM;
 454                 goto out;
 455         }
 456         if (copy_from_user(params, _params, sizeof(*params))) {
 457                 err = -EFAULT;
 458                 goto out;
 459         }
 460         err = snd_pcm_hw_params(substream, params);
 461         if (copy_to_user(_params, params, sizeof(*params))) {
 462                 if (!err)
 463                         err = -EFAULT;
 464         }
 465 out:
 466         kfree(params);
 467         return err;
 468 }
 469
 470 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 471 {
 472         struct snd_pcm_runtime *runtime;
 473         int result = 0;
 474
 475         snd_assert(substream != NULL, return -ENXIO);
 476         runtime = substream->runtime;
 477         snd_assert(runtime != NULL, return -ENXIO);
 478         snd_pcm_stream_lock_irq(substream);
 479         switch (runtime->status->state) {
 480         case SNDRV_PCM_STATE_SETUP:
 481         case SNDRV_PCM_STATE_PREPARED:
 482                 break;
 483         default:
 484                 snd_pcm_stream_unlock_irq(substream);
 485                 return -EBADFD;
 486         }
 487         snd_pcm_stream_unlock_irq(substream);
 488         if (atomic_read(&substream->mmap_count))
 489                 return -EBADFD;
 490         if (substream->ops->hw_free)
 491                 result = substream->ops->hw_free(substream);
 492         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 493         return result;
 494 }
 495
 496 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 497                              struct snd_pcm_sw_params *params)
 498 {
 499         struct snd_pcm_runtime *runtime;
 500
 501         snd_assert(substream != NULL, return -ENXIO);
 502         runtime = substream->runtime;
 503         snd_assert(runtime != NULL, return -ENXIO);
 504         snd_pcm_stream_lock_irq(substream);
 505         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 506                 snd_pcm_stream_unlock_irq(substream);
 507                 return -EBADFD;
 508         }
 509         snd_pcm_stream_unlock_irq(substream);
 510
 511         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 512                 return -EINVAL;
 513         if (params->avail_min == 0)
 514                 return -EINVAL;
 515         if (params->xfer_align == 0 ||
 516             params->xfer_align % runtime->min_align != 0)
 517                 return -EINVAL;
 518         if (params->silence_size >= runtime->boundary) {
 519                 if (params->silence_threshold != 0)
 520                         return -EINVAL;
 521         } else {
 522                 if (params->silence_size > params->silence_threshold)
 523                         return -EINVAL;
 524                 if (params->silence_threshold > runtime->buffer_size)
 525                         return -EINVAL;
 526         }
 527         snd_pcm_stream_lock_irq(substream);
 528         runtime->tstamp_mode = params->tstamp_mode;
 529         runtime->sleep_min = params->sleep_min;
 530         runtime->period_step = params->period_step;
 531         runtime->control->avail_min = params->avail_min;
 532         runtime->start_threshold = params->start_threshold;
 533         runtime->stop_threshold = params->stop_threshold;
 534         runtime->silence_threshold = params->silence_threshold;
 535         runtime->silence_size = params->silence_size;
 536         runtime->xfer_align = params->xfer_align;
 537         params->boundary = runtime->boundary;
 538         if (snd_pcm_running(substream)) {
 539                 if (runtime->sleep_min)
 540                         snd_pcm_tick_prepare(substream);
 541                 else
 542                         snd_pcm_tick_set(substream, 0);
 543                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 544                     runtime->silence_size > 0)
 545                         snd_pcm_playback_silence(substream, ULONG_MAX);
 546                 wake_up(&runtime->sleep);
 547         }
 548         snd_pcm_stream_unlock_irq(substream);
 549         return 0;
 550 }
 551
 552 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 553                                   struct snd_pcm_sw_params __user * _params)
 554 {
 555         struct snd_pcm_sw_params params;
 556         int err;
 557         if (copy_from_user(&params, _params, sizeof(params)))
 558                 return -EFAULT;
 559         err = snd_pcm_sw_params(substream, &params);
 560         if (copy_to_user(_params, &params, sizeof(params)))
 561                 return -EFAULT;
 562         return err;
 563 }
 564
 565 int snd_pcm_status(struct snd_pcm_substream *substream,
 566                    struct snd_pcm_status *status)
 567 {
 568         struct snd_pcm_runtime *runtime = substream->runtime;
 569
 570         snd_pcm_stream_lock_irq(substream);
 571         status->state = runtime->status->state;
 572         status->suspended_state = runtime->status->suspended_state;
 573         if (status->state == SNDRV_PCM_STATE_OPEN)
 574                 goto _end;
 575         status->trigger_tstamp = runtime->trigger_tstamp;
 576         if (snd_pcm_running(substream)) {
 577                 snd_pcm_update_hw_ptr(substream);
 578                 if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
 579                         status->tstamp = runtime->status->tstamp;
 580                 else
 581                         getnstimeofday(&status->tstamp);
 582         } else
 583                 getnstimeofday(&status->tstamp);
 584         status->appl_ptr = runtime->control->appl_ptr;
 585         status->hw_ptr = runtime->status->hw_ptr;
 586         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 587                 status->avail = snd_pcm_playback_avail(runtime);
 588                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 589                     runtime->status->state == SNDRV_PCM_STATE_DRAINING)
 590                         status->delay = runtime->buffer_size - status->avail;
 591                 else
 592                         status->delay = 0;
 593         } else {
 594                 status->avail = snd_pcm_capture_avail(runtime);
 595                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 596                         status->delay = status->avail;
 597                 else
 598                         status->delay = 0;
 599         }
 600         status->avail_max = runtime->avail_max;
 601         status->overrange = runtime->overrange;
 602         runtime->avail_max = 0;
 603         runtime->overrange = 0;
 604  _end:
 605         snd_pcm_stream_unlock_irq(substream);
 606         return 0;
 607 }
 608
 609 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 610                                struct snd_pcm_status __user * _status)
 611 {
 612         struct snd_pcm_status status;
 613         struct snd_pcm_runtime *runtime;
 614         int res;
 615
 616         snd_assert(substream != NULL, return -ENXIO);
 617         runtime = substream->runtime;
 618         memset(&status, 0, sizeof(status));
 619         res = snd_pcm_status(substream, &status);
 620         if (res < 0)
 621                 return res;
 622         if (copy_to_user(_status, &status, sizeof(status)))
 623                 return -EFAULT;
 624         return 0;
 625 }
 626
 627 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 628                                 struct snd_pcm_channel_info * info)
 629 {
 630         struct snd_pcm_runtime *runtime;
 631         unsigned int channel;
 632
 633         snd_assert(substream != NULL, return -ENXIO);
 634         channel = info->channel;
 635         runtime = substream->runtime;
 636         snd_pcm_stream_lock_irq(substream);
 637         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 638                 snd_pcm_stream_unlock_irq(substream);
 639                 return -EBADFD;
 640         }
 641         snd_pcm_stream_unlock_irq(substream);
 642         if (channel >= runtime->channels)
 643                 return -EINVAL;
 644         memset(info, 0, sizeof(*info));
 645         info->channel = channel;
 646         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 647 }
 648
 649 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 650                                      struct snd_pcm_channel_info __user * _info)
 651 {
 652         struct snd_pcm_channel_info info;
 653         int res;
 654
 655         if (copy_from_user(&info, _info, sizeof(info)))
 656                 return -EFAULT;
 657         res = snd_pcm_channel_info(substream, &info);
 658         if (res < 0)
 659                 return res;
 660         if (copy_to_user(_info, &info, sizeof(info)))
 661                 return -EFAULT;
 662         return 0;
 663 }
 664
 665 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 666 {
 667         struct snd_pcm_runtime *runtime = substream->runtime;
 668         if (runtime->trigger_master == NULL)
 669                 return;
 670         if (runtime->trigger_master == substream) {
 671                 getnstimeofday(&runtime->trigger_tstamp);
 672         } else {
 673                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 674                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 675         }
 676         runtime->trigger_master = NULL;
 677 }
 678
 679 struct action_ops {
 680         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 681         int (*do_action)(struct snd_pcm_substream *substream, int state);
 682         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 683         void (*post_action)(struct snd_pcm_substream *substream, int state);
 684 };
 685
 686 /*
 687  *  this functions is core for handling of linked stream
 688  *  Note: the stream state might be changed also on failure
 689  *  Note2: call with calling stream lock + link lock
 690  */
 691 static int snd_pcm_action_group(struct action_ops *ops,
 692                                 struct snd_pcm_substream *substream,
 693                                 int state, int do_lock)
 694 {
 695         struct list_head *pos;
 696         struct snd_pcm_substream *s = NULL;
 697         struct snd_pcm_substream *s1;
 698         int res = 0;
 699
 700         snd_pcm_group_for_each(pos, substream) {
 701                 s = snd_pcm_group_substream_entry(pos);
 702                 if (do_lock && s != substream)
 703                         spin_lock(&s->self_group.lock);
 704                 res = ops->pre_action(s, state);
 705                 if (res < 0)
 706                         goto _unlock;
 707         }
 708         snd_pcm_group_for_each(pos, substream) {
 709                 s = snd_pcm_group_substream_entry(pos);
 710                 res = ops->do_action(s, state);
 711                 if (res < 0) {
 712                         if (ops->undo_action) {
 713                                 snd_pcm_group_for_each(pos, substream) {
 714                                         s1 = snd_pcm_group_substream_entry(pos);
 715                                         if (s1 == s) /* failed stream */
 716                                                 break;
 717                                         ops->undo_action(s1, state);
 718                                 }
 719                         }
 720                         s = NULL; /* unlock all */
 721                         goto _unlock;
 722                 }
 723         }
 724         snd_pcm_group_for_each(pos, substream) {
 725                 s = snd_pcm_group_substream_entry(pos);
 726                 ops->post_action(s, state);
 727         }
 728  _unlock:
 729         if (do_lock) {
 730                 /* unlock streams */
 731                 snd_pcm_group_for_each(pos, substream) {
 732                         s1 = snd_pcm_group_substream_entry(pos);
 733                         if (s1 != substream)
 734                                 spin_unlock(&s1->self_group.lock);
 735                         if (s1 == s)    /* end */
 736                                 break;
 737                 }
 738         }
 739         return res;
 740 }
 741
 742 /*
 743  *  Note: call with stream lock
 744  */
 745 static int snd_pcm_action_single(struct action_ops *ops,
 746                                  struct snd_pcm_substream *substream,
 747                                  int state)
 748 {
 749         int res;
 750
 751         res = ops->pre_action(substream, state);
 752         if (res < 0)
 753                 return res;
 754         res = ops->do_action(substream, state);
 755         if (res == 0)
 756                 ops->post_action(substream, state);
 757         else if (ops->undo_action)
 758                 ops->undo_action(substream, state);
 759         return res;
 760 }
 761
 762 /*
 763  *  Note: call with stream lock
 764  */
 765 static int snd_pcm_action(struct action_ops *ops,
 766                           struct snd_pcm_substream *substream,
 767                           int state)
 768 {
 769         int res;
 770
 771         if (snd_pcm_stream_linked(substream)) {
 772                 if (!spin_trylock(&substream->group->lock)) {
 773                         spin_unlock(&substream->self_group.lock);
 774                         spin_lock(&substream->group->lock);
 775                         spin_lock(&substream->self_group.lock);
 776                 }
 777                 res = snd_pcm_action_group(ops, substream, state, 1);
 778                 spin_unlock(&substream->group->lock);
 779         } else {
 780                 res = snd_pcm_action_single(ops, substream, state);
 781         }
 782         return res;
 783 }
 784
 785 /*
 786  *  Note: don't use any locks before
 787  */
 788 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 789                                    struct snd_pcm_substream *substream,
 790                                    int state)
 791 {
 792         int res;
 793
 794         read_lock_irq(&snd_pcm_link_rwlock);
 795         if (snd_pcm_stream_linked(substream)) {
 796                 spin_lock(&substream->group->lock);
 797                 spin_lock(&substream->self_group.lock);
 798                 res = snd_pcm_action_group(ops, substream, state, 1);
 799                 spin_unlock(&substream->self_group.lock);
 800                 spin_unlock(&substream->group->lock);
 801         } else {
 802                 spin_lock(&substream->self_group.lock);
 803                 res = snd_pcm_action_single(ops, substream, state);
 804                 spin_unlock(&substream->self_group.lock);
 805         }
 806         read_unlock_irq(&snd_pcm_link_rwlock);
 807         return res;
 808 }
 809
 810 /*
 811  */
 812 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 813                                     struct snd_pcm_substream *substream,
 814                                     int state)
 815 {
 816         int res;
 817
 818         down_read(&snd_pcm_link_rwsem);
 819         if (snd_pcm_stream_linked(substream))
 820                 res = snd_pcm_action_group(ops, substream, state, 0);
 821         else
 822                 res = snd_pcm_action_single(ops, substream, state);
 823         up_read(&snd_pcm_link_rwsem);
 824         return res;
 825 }
 826
 827 /*
 828  * start callbacks
 829  */
 830 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 831 {
 832         struct snd_pcm_runtime *runtime = substream->runtime;
 833         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 834                 return -EBADFD;
 835         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 836             !snd_pcm_playback_data(substream))
 837                 return -EPIPE;
 838         runtime->trigger_master = substream;
 839         return 0;
 840 }
 841
 842 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 843 {
 844         if (substream->runtime->trigger_master != substream)
 845                 return 0;
 846         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
 847 }
 848
 849 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
 850 {
 851         if (substream->runtime->trigger_master == substream)
 852                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 853 }
 854
 855 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
 856 {
 857         struct snd_pcm_runtime *runtime = substream->runtime;
 858         snd_pcm_trigger_tstamp(substream);
 859         runtime->status->state = state;
 860         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 861             runtime->silence_size > 0)
 862                 snd_pcm_playback_silence(substream, ULONG_MAX);
 863         if (runtime->sleep_min)
 864                 snd_pcm_tick_prepare(substream);
 865         if (substream->timer)
 866                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
 867                                  &runtime->trigger_tstamp);
 868 }
 869
 870 static struct action_ops snd_pcm_action_start = {
 871         .pre_action = snd_pcm_pre_start,
 872         .do_action = snd_pcm_do_start,
 873         .undo_action = snd_pcm_undo_start,
 874         .post_action = snd_pcm_post_start
 875 };
 876
 877 /**
 878  * snd_pcm_start
 879  * @substream: the PCM substream instance
 880  *
 881  * Start all linked streams.
 882  */
 883 int snd_pcm_start(struct snd_pcm_substream *substream)
 884 {
 885         return snd_pcm_action(&snd_pcm_action_start, substream,
 886                               SNDRV_PCM_STATE_RUNNING);
 887 }
 888
 889 /*
 890  * stop callbacks
 891  */
 892 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
 893 {
 894         struct snd_pcm_runtime *runtime = substream->runtime;
 895         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 896                 return -EBADFD;
 897         runtime->trigger_master = substream;
 898         return 0;
 899 }
 900
 901 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
 902 {
 903         if (substream->runtime->trigger_master == substream &&
 904             snd_pcm_running(substream))
 905                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 906         return 0; /* unconditonally stop all substreams */
 907 }
 908
 909 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
 910 {
 911         struct snd_pcm_runtime *runtime = substream->runtime;
 912         if (runtime->status->state != state) {
 913                 snd_pcm_trigger_tstamp(substream);
 914                 if (substream->timer)
 915                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
 916                                          &runtime->trigger_tstamp);
 917                 runtime->status->state = state;
 918                 snd_pcm_tick_set(substream, 0);
 919         }
 920         wake_up(&runtime->sleep);
 921 }
 922
 923 static struct action_ops snd_pcm_action_stop = {
 924         .pre_action = snd_pcm_pre_stop,
 925         .do_action = snd_pcm_do_stop,
 926         .post_action = snd_pcm_post_stop
 927 };
 928
 929 /**
 930  * snd_pcm_stop
 931  * @substream: the PCM substream instance
 932  * @state: PCM state after stopping the stream
 933  *
 934  * Try to stop all running streams in the substream group.
 935  * The state of each stream is changed to the given value after that unconditionally.
 936  */
 937 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
 938 {
 939         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
 940 }
 941
 942 EXPORT_SYMBOL(snd_pcm_stop);
 943
 944 /**
 945  * snd_pcm_drain_done
 946  * @substream: the PCM substream
 947  *
 948  * Stop the DMA only when the given stream is playback.
 949  * The state is changed to SETUP.
 950  * Unlike snd_pcm_stop(), this affects only the given stream.
 951  */
 952 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
 953 {
 954         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
 955                                      SNDRV_PCM_STATE_SETUP);
 956 }
 957
 958 /*
 959  * pause callbacks
 960  */
 961 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
 962 {
 963         struct snd_pcm_runtime *runtime = substream->runtime;
 964         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
 965                 return -ENOSYS;
 966         if (push) {
 967                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
 968                         return -EBADFD;
 969         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
 970                 return -EBADFD;
 971         runtime->trigger_master = substream;
 972         return 0;
 973 }
 974
 975 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
 976 {
 977         if (substream->runtime->trigger_master != substream)
 978                 return 0;
 979         return substream->ops->trigger(substream,
 980                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
 981                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
 982 }
 983
 984 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
 985 {
 986         if (substream->runtime->trigger_master == substream)
 987                 substream->ops->trigger(substream,
 988                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
 989                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
 990 }
 991
 992 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
 993 {
 994         struct snd_pcm_runtime *runtime = substream->runtime;
 995         snd_pcm_trigger_tstamp(substream);
 996         if (push) {
 997                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
 998                 if (substream->timer)
 999                         snd_timer_notify(substream->timer,
1000                                          SNDRV_TIMER_EVENT_MPAUSE,
1001                                          &runtime->trigger_tstamp);
1002                 snd_pcm_tick_set(substream, 0);
1003                 wake_up(&runtime->sleep);
1004         } else {
1005                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1006                 if (runtime->sleep_min)
1007                         snd_pcm_tick_prepare(substream);
1008                 if (substream->timer)
1009                         snd_timer_notify(substream->timer,
1010                                          SNDRV_TIMER_EVENT_MCONTINUE,
1011                                          &runtime->trigger_tstamp);
1012         }
1013 }
1014
1015 static struct action_ops snd_pcm_action_pause = {
1016         .pre_action = snd_pcm_pre_pause,
1017         .do_action = snd_pcm_do_pause,
1018         .undo_action = snd_pcm_undo_pause,
1019         .post_action = snd_pcm_post_pause
1020 };
1021
1022 /*
1023  * Push/release the pause for all linked streams.
1024  */
1025 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1026 {
1027         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1028 }
1029
1030 #ifdef CONFIG_PM
1031 /* suspend */
1032
1033 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1034 {
1035         struct snd_pcm_runtime *runtime = substream->runtime;
1036         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1037                 return -EBUSY;
1038         runtime->trigger_master = substream;
1039         return 0;
1040 }
1041
1042 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1043 {
1044         struct snd_pcm_runtime *runtime = substream->runtime;
1045         if (runtime->trigger_master != substream)
1046                 return 0;
1047         if (! snd_pcm_running(substream))
1048                 return 0;
1049         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1050         return 0; /* suspend unconditionally */
1051 }
1052
1053 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1054 {
1055         struct snd_pcm_runtime *runtime = substream->runtime;
1056         snd_pcm_trigger_tstamp(substream);
1057         if (substream->timer)
1058                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1059                                  &runtime->trigger_tstamp);
1060         runtime->status->suspended_state = runtime->status->state;
1061         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1062         snd_pcm_tick_set(substream, 0);
1063         wake_up(&runtime->sleep);
1064 }
1065
1066 static struct action_ops snd_pcm_action_suspend = {
1067         .pre_action = snd_pcm_pre_suspend,
1068         .do_action = snd_pcm_do_suspend,
1069         .post_action = snd_pcm_post_suspend
1070 };
1071
1072 /**
1073  * snd_pcm_suspend
1074  * @substream: the PCM substream
1075  *
1076  * Trigger SUSPEND to all linked streams.
1077  * After this call, all streams are changed to SUSPENDED state.
1078  */
1079 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1080 {
1081         int err;
1082         unsigned long flags;
1083
1084         if (! substream)
1085                 return 0;
1086
1087         snd_pcm_stream_lock_irqsave(substream, flags);
1088         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1089         snd_pcm_stream_unlock_irqrestore(substream, flags);
1090         return err;
1091 }
1092
1093 EXPORT_SYMBOL(snd_pcm_suspend);
1094
1095 /**
1096  * snd_pcm_suspend_all
1097  * @pcm: the PCM instance
1098  *
1099  * Trigger SUSPEND to all substreams in the given pcm.
1100  * After this call, all streams are changed to SUSPENDED state.
1101  */
1102 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1103 {
1104         struct snd_pcm_substream *substream;
1105         int stream, err = 0;
1106
1107         if (! pcm)
1108                 return 0;
1109
1110         for (stream = 0; stream < 2; stream++) {
1111                 for (substream = pcm->streams[stream].substream;
1112                      substream; substream = substream->next) {
1113                         /* FIXME: the open/close code should lock this as well */
1114                         if (substream->runtime == NULL)
1115                                 continue;
1116                         err = snd_pcm_suspend(substream);
1117                         if (err < 0 && err != -EBUSY)
1118                                 return err;
1119                 }
1120         }
1121         return 0;
1122 }
1123
1124 EXPORT_SYMBOL(snd_pcm_suspend_all);
1125
1126 /* resume */
1127
1128 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1129 {
1130         struct snd_pcm_runtime *runtime = substream->runtime;
1131         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1132                 return -ENOSYS;
1133         runtime->trigger_master = substream;
1134         return 0;
1135 }
1136
1137 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1138 {
1139         struct snd_pcm_runtime *runtime = substream->runtime;
1140         if (runtime->trigger_master != substream)
1141                 return 0;
1142         /* DMA not running previously? */
1143         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1144             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1145              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1146                 return 0;
1147         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1148 }
1149
1150 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1151 {
1152         if (substream->runtime->trigger_master == substream &&
1153             snd_pcm_running(substream))
1154                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1155 }
1156
1157 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1158 {
1159         struct snd_pcm_runtime *runtime = substream->runtime;
1160         snd_pcm_trigger_tstamp(substream);
1161         if (substream->timer)
1162                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1163                                  &runtime->trigger_tstamp);
1164         runtime->status->state = runtime->status->suspended_state;
1165         if (runtime->sleep_min)
1166                 snd_pcm_tick_prepare(substream);
1167 }
1168
1169 static struct action_ops snd_pcm_action_resume = {
1170         .pre_action = snd_pcm_pre_resume,
1171         .do_action = snd_pcm_do_resume,
1172         .undo_action = snd_pcm_undo_resume,
1173         .post_action = snd_pcm_post_resume
1174 };
1175
1176 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1177 {
1178         struct snd_card *card = substream->pcm->card;
1179         int res;
1180
1181         snd_power_lock(card);
1182         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1183                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1184         snd_power_unlock(card);
1185         return res;
1186 }
1187
1188 #else
1189
1190 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1191 {
1192         return -ENOSYS;
1193 }
1194
1195 #endif /* CONFIG_PM */
1196
1197 /*
1198  * xrun ioctl
1199  *
1200  * Change the RUNNING stream(s) to XRUN state.
1201  */
1202 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1203 {
1204         struct snd_card *card = substream->pcm->card;
1205         struct snd_pcm_runtime *runtime = substream->runtime;
1206         int result;
1207
1208         snd_power_lock(card);
1209         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1210                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1211                 if (result < 0)
1212                         goto _unlock;
1213         }
1214
1215         snd_pcm_stream_lock_irq(substream);
1216         switch (runtime->status->state) {
1217         case SNDRV_PCM_STATE_XRUN:
1218                 result = 0;     /* already there */
1219                 break;
1220         case SNDRV_PCM_STATE_RUNNING:
1221                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1222                 break;
1223         default:
1224                 result = -EBADFD;
1225         }
1226         snd_pcm_stream_unlock_irq(substream);
1227  _unlock:
1228         snd_power_unlock(card);
1229         return result;
1230 }
1231
1232 /*
1233  * reset ioctl
1234  */
1235 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1236 {
1237         struct snd_pcm_runtime *runtime = substream->runtime;
1238         switch (runtime->status->state) {
1239         case SNDRV_PCM_STATE_RUNNING:
1240         case SNDRV_PCM_STATE_PREPARED:
1241         case SNDRV_PCM_STATE_PAUSED:
1242         case SNDRV_PCM_STATE_SUSPENDED:
1243                 return 0;
1244         default:
1245                 return -EBADFD;
1246         }
1247 }
1248
1249 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1250 {
1251         struct snd_pcm_runtime *runtime = substream->runtime;
1252         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1253         if (err < 0)
1254                 return err;
1255         // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1256         runtime->hw_ptr_base = 0;
1257         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1258                 runtime->status->hw_ptr % runtime->period_size;
1259         runtime->silence_start = runtime->status->hw_ptr;
1260         runtime->silence_filled = 0;
1261         return 0;
1262 }
1263
1264 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1265 {
1266         struct snd_pcm_runtime *runtime = substream->runtime;
1267         runtime->control->appl_ptr = runtime->status->hw_ptr;
1268         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1269             runtime->silence_size > 0)
1270                 snd_pcm_playback_silence(substream, ULONG_MAX);
1271 }
1272
1273 static struct action_ops snd_pcm_action_reset = {
1274         .pre_action = snd_pcm_pre_reset,
1275         .do_action = snd_pcm_do_reset,
1276         .post_action = snd_pcm_post_reset
1277 };
1278
1279 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1280 {
1281         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1282 }
1283
1284 /*
1285  * prepare ioctl
1286  */
1287 /* we use the second argument for updating f_flags */
1288 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1289                                int f_flags)
1290 {
1291         struct snd_pcm_runtime *runtime = substream->runtime;
1292         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1293                 return -EBADFD;
1294         if (snd_pcm_running(substream))
1295                 return -EBUSY;
1296         substream->f_flags = f_flags;
1297         return 0;
1298 }
1299
1300 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1301 {
1302         int err;
1303         err = substream->ops->prepare(substream);
1304         if (err < 0)
1305                 return err;
1306         return snd_pcm_do_reset(substream, 0);
1307 }
1308
1309 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1310 {
1311         struct snd_pcm_runtime *runtime = substream->runtime;
1312         runtime->control->appl_ptr = runtime->status->hw_ptr;
1313         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1314 }
1315
1316 static struct action_ops snd_pcm_action_prepare = {
1317         .pre_action = snd_pcm_pre_prepare,
1318         .do_action = snd_pcm_do_prepare,
1319         .post_action = snd_pcm_post_prepare
1320 };
1321
1322 /**
1323  * snd_pcm_prepare
1324  * @substream: the PCM substream instance
1325  * @file: file to refer f_flags
1326  *
1327  * Prepare the PCM substream to be triggerable.
1328  */
1329 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1330                            struct file *file)
1331 {
1332         int res;
1333         struct snd_card *card = substream->pcm->card;
1334         int f_flags;
1335
1336         if (file)
1337                 f_flags = file->f_flags;
1338         else
1339                 f_flags = substream->f_flags;
1340
1341         snd_power_lock(card);
1342         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1343                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1344                                                substream, f_flags);
1345         snd_power_unlock(card);
1346         return res;
1347 }
1348
1349 /*
1350  * drain ioctl
1351  */
1352
1353 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1354 {
1355         if (substream->f_flags & O_NONBLOCK)
1356                 return -EAGAIN;
1357         substream->runtime->trigger_master = substream;
1358         return 0;
1359 }
1360
1361 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1362 {
1363         struct snd_pcm_runtime *runtime = substream->runtime;
1364         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1365                 switch (runtime->status->state) {
1366                 case SNDRV_PCM_STATE_PREPARED:
1367                         /* start playback stream if possible */
1368                         if (! snd_pcm_playback_empty(substream)) {
1369                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1370                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1371                         }
1372                         break;
1373                 case SNDRV_PCM_STATE_RUNNING:
1374                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1375                         break;
1376                 default:
1377                         break;
1378                 }
1379         } else {
1380                 /* stop running stream */
1381                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1382                         int state = snd_pcm_capture_avail(runtime) > 0 ?
1383                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1384                         snd_pcm_do_stop(substream, state);
1385                         snd_pcm_post_stop(substream, state);
1386                 }
1387         }
1388         return 0;
1389 }
1390
1391 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1392 {
1393 }
1394
1395 static struct action_ops snd_pcm_action_drain_init = {
1396         .pre_action = snd_pcm_pre_drain_init,
1397         .do_action = snd_pcm_do_drain_init,
1398         .post_action = snd_pcm_post_drain_init
1399 };
1400
1401 struct drain_rec {
1402         struct snd_pcm_substream *substream;
1403         wait_queue_t wait;
1404         snd_pcm_uframes_t stop_threshold;
1405 };
1406
1407 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1408
1409 /*
1410  * Drain the stream(s).
1411  * When the substream is linked, sync until the draining of all playback streams
1412  * is finished.
1413  * After this call, all streams are supposed to be either SETUP or DRAINING
1414  * (capture only) state.
1415  */
1416 static int snd_pcm_drain(struct snd_pcm_substream *substream)
1417 {
1418         struct snd_card *card;
1419         struct snd_pcm_runtime *runtime;
1420         struct list_head *pos;
1421         int result = 0;
1422         int i, num_drecs;
1423         struct drain_rec *drec, drec_tmp, *d;
1424
1425         snd_assert(substream != NULL, return -ENXIO);
1426         card = substream->pcm->card;
1427         runtime = substream->runtime;
1428
1429         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1430                 return -EBADFD;
1431
1432         snd_power_lock(card);
1433         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1434                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1435                 if (result < 0) {
1436                         snd_power_unlock(card);
1437                         return result;
1438                 }
1439         }
1440
1441         /* allocate temporary record for drain sync */
1442         down_read(&snd_pcm_link_rwsem);
1443         if (snd_pcm_stream_linked(substream)) {
1444                 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1445                 if (! drec) {
1446                         up_read(&snd_pcm_link_rwsem);
1447                         snd_power_unlock(card);
1448                         return -ENOMEM;
1449                 }
1450         } else
1451                 drec = &drec_tmp;
1452
1453         /* count only playback streams */
1454         num_drecs = 0;
1455         snd_pcm_group_for_each(pos, substream) {
1456                 struct snd_pcm_substream *s = snd_pcm_group_substream_entry(pos);
1457                 runtime = s->runtime;
1458                 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1459                         d = &drec[num_drecs++];
1460                         d->substream = s;
1461                         init_waitqueue_entry(&d->wait, current);
1462                         add_wait_queue(&runtime->sleep, &d->wait);
1463                         /* stop_threshold fixup to avoid endless loop when
1464                          * stop_threshold > buffer_size
1465                          */
1466                         d->stop_threshold = runtime->stop_threshold;
1467                         if (runtime->stop_threshold > runtime->buffer_size)
1468                                 runtime->stop_threshold = runtime->buffer_size;
1469                 }
1470         }
1471         up_read(&snd_pcm_link_rwsem);
1472
1473         snd_pcm_stream_lock_irq(substream);
1474         /* resume pause */
1475         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1476                 snd_pcm_pause(substream, 0);
1477
1478         /* pre-start/stop - all running streams are changed to DRAINING state */
1479         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1480         if (result < 0) {
1481                 snd_pcm_stream_unlock_irq(substream);
1482                 goto _error;
1483         }
1484
1485         for (;;) {
1486                 long tout;
1487                 if (signal_pending(current)) {
1488                         result = -ERESTARTSYS;
1489                         break;
1490                 }
1491                 /* all finished? */
1492                 for (i = 0; i < num_drecs; i++) {
1493                         runtime = drec[i].substream->runtime;
1494                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1495                                 break;
1496                 }
1497                 if (i == num_drecs)
1498                         break; /* yes, all drained */
1499
1500                 set_current_state(TASK_INTERRUPTIBLE);
1501                 snd_pcm_stream_unlock_irq(substream);
1502                 snd_power_unlock(card);
1503                 tout = schedule_timeout(10 * HZ);
1504                 snd_power_lock(card);
1505                 snd_pcm_stream_lock_irq(substream);
1506                 if (tout == 0) {
1507                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1508                                 result = -ESTRPIPE;
1509                         else {
1510                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1511                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1512                                 result = -EIO;
1513                         }
1514                         break;
1515                 }
1516         }
1517
1518         snd_pcm_stream_unlock_irq(substream);
1519
1520  _error:
1521         for (i = 0; i < num_drecs; i++) {
1522                 d = &drec[i];
1523                 runtime = d->substream->runtime;
1524                 remove_wait_queue(&runtime->sleep, &d->wait);
1525                 runtime->stop_threshold = d->stop_threshold;
1526         }
1527
1528         if (drec != &drec_tmp)
1529                 kfree(drec);
1530         snd_power_unlock(card);
1531
1532         return result;
1533 }
1534
1535 /*
1536  * drop ioctl
1537  *
1538  * Immediately put all linked substreams into SETUP state.
1539  */
1540 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1541 {
1542         struct snd_pcm_runtime *runtime;
1543         struct snd_card *card;
1544         int result = 0;
1545
1546         snd_assert(substream != NULL, return -ENXIO);
1547         runtime = substream->runtime;
1548         card = substream->pcm->card;
1549
1550         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1551                 return -EBADFD;
1552
1553         snd_power_lock(card);
1554         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1555                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1556                 if (result < 0)
1557                         goto _unlock;
1558         }
1559
1560         snd_pcm_stream_lock_irq(substream);
1561         /* resume pause */
1562         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1563                 snd_pcm_pause(substream, 0);
1564
1565         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1566         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1567         snd_pcm_stream_unlock_irq(substream);
1568  _unlock:
1569         snd_power_unlock(card);
1570         return result;
1571 }
1572
1573
1574 /* WARNING: Don't forget to fput back the file */
1575 static struct file *snd_pcm_file_fd(int fd)
1576 {
1577         struct file *file;
1578         struct inode *inode;
1579         unsigned int minor;
1580
1581         file = fget(fd);
1582         if (!file)
1583                 return NULL;
1584         inode = file->f_dentry->d_inode;
1585         if (!S_ISCHR(inode->i_mode) ||
1586             imajor(inode) != snd_major) {
1587                 fput(file);
1588                 return NULL;
1589         }
1590         minor = iminor(inode);
1591         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1592             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1593                 fput(file);
1594                 return NULL;
1595         }
1596         return file;
1597 }
1598
1599 /*
1600  * PCM link handling
1601  */
1602 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1603 {
1604         int res = 0;
1605         struct file *file;
1606         struct snd_pcm_file *pcm_file;
1607         struct snd_pcm_substream *substream1;
1608
1609         file = snd_pcm_file_fd(fd);
1610         if (!file)
1611                 return -EBADFD;
1612         pcm_file = file->private_data;
1613         substream1 = pcm_file->substream;
1614         down_write(&snd_pcm_link_rwsem);
1615         write_lock_irq(&snd_pcm_link_rwlock);
1616         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1617             substream->runtime->status->state != substream1->runtime->status->state) {
1618                 res = -EBADFD;
1619                 goto _end;
1620         }
1621         if (snd_pcm_stream_linked(substream1)) {
1622                 res = -EALREADY;
1623                 goto _end;
1624         }
1625         if (!snd_pcm_stream_linked(substream)) {
1626                 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1627                 if (substream->group == NULL) {
1628                         res = -ENOMEM;
1629                         goto _end;
1630                 }
1631                 spin_lock_init(&substream->group->lock);
1632                 INIT_LIST_HEAD(&substream->group->substreams);
1633                 list_add_tail(&substream->link_list, &substream->group->substreams);
1634                 substream->group->count = 1;
1635         }
1636         list_add_tail(&substream1->link_list, &substream->group->substreams);
1637         substream->group->count++;
1638         substream1->group = substream->group;
1639  _end:
1640         write_unlock_irq(&snd_pcm_link_rwlock);
1641         up_write(&snd_pcm_link_rwsem);
1642         fput(file);
1643         return res;
1644 }
1645
1646 static void relink_to_local(struct snd_pcm_substream *substream)
1647 {
1648         substream->group = &substream->self_group;
1649         INIT_LIST_HEAD(&substream->self_group.substreams);
1650         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1651 }
1652
1653 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1654 {
1655         struct list_head *pos;
1656         int res = 0;
1657
1658         down_write(&snd_pcm_link_rwsem);
1659         write_lock_irq(&snd_pcm_link_rwlock);
1660         if (!snd_pcm_stream_linked(substream)) {
1661                 res = -EALREADY;
1662                 goto _end;
1663         }
1664         list_del(&substream->link_list);
1665         substream->group->count--;
1666         if (substream->group->count == 1) {     /* detach the last stream, too */
1667                 snd_pcm_group_for_each(pos, substream) {
1668                         relink_to_local(snd_pcm_group_substream_entry(pos));
1669                         break;
1670                 }
1671                 kfree(substream->group);
1672         }
1673         relink_to_local(substream);
1674        _end:
1675         write_unlock_irq(&snd_pcm_link_rwlock);
1676         up_write(&snd_pcm_link_rwsem);
1677         return res;
1678 }
1679
1680 /*
1681  * hw configurator
1682  */
1683 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1684                                struct snd_pcm_hw_rule *rule)
1685 {
1686         struct snd_interval t;
1687         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1688                      hw_param_interval_c(params, rule->deps[1]), &t);
1689         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1690 }
1691
1692 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1693                                struct snd_pcm_hw_rule *rule)
1694 {
1695         struct snd_interval t;
1696         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1697                      hw_param_interval_c(params, rule->deps[1]), &t);
1698         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1699 }
1700
1701 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1702                                    struct snd_pcm_hw_rule *rule)
1703 {
1704         struct snd_interval t;
1705         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1706                          hw_param_interval_c(params, rule->deps[1]),
1707                          (unsigned long) rule->private, &t);
1708         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1709 }
1710
1711 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1712                                    struct snd_pcm_hw_rule *rule)
1713 {
1714         struct snd_interval t;
1715         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1716                          (unsigned long) rule->private,
1717                          hw_param_interval_c(params, rule->deps[1]), &t);
1718         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1719 }
1720
1721 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1722                                   struct snd_pcm_hw_rule *rule)
1723 {
1724         unsigned int k;
1725         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1726         struct snd_mask m;
1727         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1728         snd_mask_any(&m);
1729         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1730                 int bits;
1731                 if (! snd_mask_test(mask, k))
1732                         continue;
1733                 bits = snd_pcm_format_physical_width(k);
1734                 if (bits <= 0)
1735                         continue; /* ignore invalid formats */
1736                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1737                         snd_mask_reset(&m, k);
1738         }
1739         return snd_mask_refine(mask, &m);
1740 }
1741
1742 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1743                                        struct snd_pcm_hw_rule *rule)
1744 {
1745         struct snd_interval t;
1746         unsigned int k;
1747         t.min = UINT_MAX;
1748         t.max = 0;
1749         t.openmin = 0;
1750         t.openmax = 0;
1751         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1752                 int bits;
1753                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1754                         continue;
1755                 bits = snd_pcm_format_physical_width(k);
1756                 if (bits <= 0)
1757                         continue; /* ignore invalid formats */
1758                 if (t.min > (unsigned)bits)
1759                         t.min = bits;
1760                 if (t.max < (unsigned)bits)
1761                         t.max = bits;
1762         }
1763         t.integer = 1;
1764         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1765 }
1766
1767 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1768 #error "Change this table"
1769 #endif
1770
1771 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1772                                  48000, 64000, 88200, 96000, 176400, 192000 };
1773
1774 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1775                                 struct snd_pcm_hw_rule *rule)
1776 {
1777         struct snd_pcm_hardware *hw = rule->private;
1778         return snd_interval_list(hw_param_interval(params, rule->var),
1779                                  ARRAY_SIZE(rates), rates, hw->rates);
1780 }
1781
1782 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1783                                             struct snd_pcm_hw_rule *rule)
1784 {
1785         struct snd_interval t;
1786         struct snd_pcm_substream *substream = rule->private;
1787         t.min = 0;
1788         t.max = substream->buffer_bytes_max;
1789         t.openmin = 0;
1790         t.openmax = 0;
1791         t.integer = 1;
1792         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1793 }
1794
1795 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1796 {
1797         struct snd_pcm_runtime *runtime = substream->runtime;
1798         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1799         int k, err;
1800
1801         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1802                 snd_mask_any(constrs_mask(constrs, k));
1803         }
1804
1805         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1806                 snd_interval_any(constrs_interval(constrs, k));
1807         }
1808
1809         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1810         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1811         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1812         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1813         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1814
1815         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1816                                    snd_pcm_hw_rule_format, NULL,
1817                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1818         if (err < 0)
1819                 return err;
1820         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1821                                   snd_pcm_hw_rule_sample_bits, NULL,
1822                                   SNDRV_PCM_HW_PARAM_FORMAT,
1823                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1824         if (err < 0)
1825                 return err;
1826         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1827                                   snd_pcm_hw_rule_div, NULL,
1828                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1829         if (err < 0)
1830                 return err;
1831         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1832                                   snd_pcm_hw_rule_mul, NULL,
1833                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1834         if (err < 0)
1835                 return err;
1836         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1837                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1838                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1839         if (err < 0)
1840                 return err;
1841         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1842                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1843                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1844         if (err < 0)
1845                 return err;
1846         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1847                                   snd_pcm_hw_rule_div, NULL,
1848                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1849         if (err < 0)
1850                 return err;
1851         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1852                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1853                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1854         if (err < 0)
1855                 return err;
1856         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1857                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1858                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1859         if (err < 0)
1860                 return err;
1861         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1862                                   snd_pcm_hw_rule_div, NULL,
1863                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1864         if (err < 0)
1865                 return err;
1866         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1867                                   snd_pcm_hw_rule_div, NULL,
1868                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1869         if (err < 0)
1870                 return err;
1871         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1872                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1873                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1874         if (err < 0)
1875                 return err;
1876         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1877                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1878                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1879         if (err < 0)
1880                 return err;
1881         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1882                                   snd_pcm_hw_rule_mul, NULL,
1883                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1884         if (err < 0)
1885                 return err;
1886         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1887                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1888                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1889         if (err < 0)
1890                 return err;
1891         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1892                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1893                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1894         if (err < 0)
1895                 return err;
1896         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1897                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1898                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1899         if (err < 0)
1900                 return err;
1901         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1902                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1903                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1904         if (err < 0)
1905                 return err;
1906         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1907                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1908                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1909         if (err < 0)
1910                 return err;
1911         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1912                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1913                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1914         if (err < 0)
1915                 return err;
1916         return 0;
1917 }
1918
1919 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1920 {
1921         struct snd_pcm_runtime *runtime = substream->runtime;
1922         struct snd_pcm_hardware *hw = &runtime->hw;
1923         int err;
1924         unsigned int mask = 0;
1925
1926         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1927                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1928         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1929                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1930         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1931                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1932                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1933                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1934                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1935                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1936                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1937         }
1938         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1939         snd_assert(err >= 0, return -EINVAL);
1940
1941         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1942         snd_assert(err >= 0, return -EINVAL);
1943
1944         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1945         snd_assert(err >= 0, return -EINVAL);
1946
1947         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1948                                            hw->channels_min, hw->channels_max);
1949         snd_assert(err >= 0, return -EINVAL);
1950
1951         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1952                                            hw->rate_min, hw->rate_max);
1953         snd_assert(err >= 0, return -EINVAL);
1954
1955         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1956                                            hw->period_bytes_min, hw->period_bytes_max);
1957         snd_assert(err >= 0, return -EINVAL);
1958
1959         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1960                                            hw->periods_min, hw->periods_max);
1961         snd_assert(err >= 0, return -EINVAL);
1962
1963         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1964                                            hw->period_bytes_min, hw->buffer_bytes_max);
1965         snd_assert(err >= 0, return -EINVAL);
1966
1967         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1968                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1969                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1970         if (err < 0)
1971                 return err;
1972
1973         /* FIXME: remove */
1974         if (runtime->dma_bytes) {
1975                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1976                 snd_assert(err >= 0, return -EINVAL);
1977         }
1978
1979         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1980                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1981                                           snd_pcm_hw_rule_rate, hw,
1982                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1983                 if (err < 0)
1984                         return err;
1985         }
1986
1987         /* FIXME: this belong to lowlevel */
1988         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
1989                                      1000000 / HZ, 1000000 / HZ);
1990         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1991
1992         return 0;
1993 }
1994
1995 static void snd_pcm_add_file(struct snd_pcm_str *str,
1996                              struct snd_pcm_file *pcm_file)
1997 {
1998         pcm_file->next = str->files;
1999         str->files = pcm_file;
2000 }
2001
2002 static void snd_pcm_remove_file(struct snd_pcm_str *str,
2003                                 struct snd_pcm_file *pcm_file)
2004 {
2005         struct snd_pcm_file * pcm_file1;
2006         if (str->files == pcm_file) {
2007                 str->files = pcm_file->next;
2008         } else {
2009                 pcm_file1 = str->files;
2010                 while (pcm_file1 && pcm_file1->next != pcm_file)
2011                         pcm_file1 = pcm_file1->next;
2012                 if (pcm_file1 != NULL)
2013                         pcm_file1->next = pcm_file->next;
2014         }
2015 }
2016
2017 static void pcm_release_private(struct snd_pcm_substream *substream)
2018 {
2019         struct snd_pcm_file *pcm_file = substream->file;
2020
2021         snd_pcm_unlink(substream);
2022         snd_pcm_remove_file(substream->pstr, pcm_file);
2023         kfree(pcm_file);
2024 }
2025
2026 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2027 {
2028         substream->ref_count--;
2029         if (substream->ref_count > 0)
2030                 return;
2031
2032         snd_pcm_drop(substream);
2033         if (substream->hw_opened) {
2034                 if (substream->ops->hw_free != NULL)
2035                         substream->ops->hw_free(substream);
2036                 substream->ops->close(substream);
2037                 substream->hw_opened = 0;
2038         }
2039         if (substream->pcm_release) {
2040                 substream->pcm_release(substream);
2041                 substream->pcm_release = NULL;
2042         }
2043         snd_pcm_detach_substream(substream);
2044 }
2045
2046 EXPORT_SYMBOL(snd_pcm_release_substream);
2047
2048 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2049                            struct file *file,
2050                            struct snd_pcm_substream **rsubstream)
2051 {
2052         struct snd_pcm_substream *substream;
2053         int err;
2054
2055         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2056         if (err < 0)
2057                 return err;
2058         if (substream->ref_count > 1) {
2059                 *rsubstream = substream;
2060                 return 0;
2061         }
2062
2063         substream->no_mmap_ctrl = 0;
2064         err = snd_pcm_hw_constraints_init(substream);
2065         if (err < 0) {
2066                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2067                 goto error;
2068         }
2069
2070         if ((err = substream->ops->open(substream)) < 0)
2071                 goto error;
2072
2073         substream->hw_opened = 1;
2074
2075         err = snd_pcm_hw_constraints_complete(substream);
2076         if (err < 0) {
2077                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2078                 goto error;
2079         }
2080
2081         *rsubstream = substream;
2082         return 0;
2083
2084  error:
2085         snd_pcm_release_substream(substream);
2086         return err;
2087 }
2088
2089 EXPORT_SYMBOL(snd_pcm_open_substream);
2090
2091 static int snd_pcm_open_file(struct file *file,
2092                              struct snd_pcm *pcm,
2093                              int stream,
2094                              struct snd_pcm_file **rpcm_file)
2095 {
2096         struct snd_pcm_file *pcm_file;
2097         struct snd_pcm_substream *substream;
2098         struct snd_pcm_str *str;
2099         int err;
2100
2101         snd_assert(rpcm_file != NULL, return -EINVAL);
2102         *rpcm_file = NULL;
2103
2104         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2105         if (err < 0)
2106                 return err;
2107
2108         if (substream->ref_count > 1)
2109                 pcm_file = substream->file;
2110         else {
2111                 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2112                 if (pcm_file == NULL) {
2113                         snd_pcm_release_substream(substream);
2114                         return -ENOMEM;
2115                 }
2116                 str = substream->pstr;
2117                 substream->file = pcm_file;
2118                 substream->pcm_release = pcm_release_private;
2119                 pcm_file->substream = substream;
2120                 snd_pcm_add_file(str, pcm_file);
2121         }
2122         file->private_data = pcm_file;
2123         *rpcm_file = pcm_file;
2124         return 0;
2125 }
2126
2127 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2128 {
2129         struct snd_pcm *pcm;
2130
2131         pcm = snd_lookup_minor_data(iminor(inode),
2132                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2133         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2134 }
2135
2136 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2137 {
2138         struct snd_pcm *pcm;
2139
2140         pcm = snd_lookup_minor_data(iminor(inode),
2141                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2142         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2143 }
2144
2145 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2146 {
2147         int err;
2148         struct snd_pcm_file *pcm_file;
2149         wait_queue_t wait;
2150
2151         if (pcm == NULL) {
2152                 err = -ENODEV;
2153                 goto __error1;
2154         }
2155         err = snd_card_file_add(pcm->card, file);
2156         if (err < 0)
2157                 goto __error1;
2158         if (!try_module_get(pcm->card->module)) {
2159                 err = -EFAULT;
2160                 goto __error2;
2161         }
2162         init_waitqueue_entry(&wait, current);
2163         add_wait_queue(&pcm->open_wait, &wait);
2164         mutex_lock(&pcm->open_mutex);
2165         while (1) {
2166                 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2167                 if (err >= 0)
2168                         break;
2169                 if (err == -EAGAIN) {
2170                         if (file->f_flags & O_NONBLOCK) {
2171                                 err = -EBUSY;
2172                                 break;
2173                         }
2174                 } else
2175                         break;
2176                 set_current_state(TASK_INTERRUPTIBLE);
2177                 mutex_unlock(&pcm->open_mutex);
2178                 schedule();
2179                 mutex_lock(&pcm->open_mutex);
2180                 if (signal_pending(current)) {
2181                         err = -ERESTARTSYS;
2182                         break;
2183                 }
2184         }
2185         remove_wait_queue(&pcm->open_wait, &wait);
2186         mutex_unlock(&pcm->open_mutex);
2187         if (err < 0)
2188                 goto __error;
2189         return err;
2190
2191       __error:
2192         module_put(pcm->card->module);
2193       __error2:
2194         snd_card_file_remove(pcm->card, file);
2195       __error1:
2196         return err;
2197 }
2198
2199 static int snd_pcm_release(struct inode *inode, struct file *file)
2200 {
2201         struct snd_pcm *pcm;
2202         struct snd_pcm_substream *substream;
2203         struct snd_pcm_file *pcm_file;
2204
2205         pcm_file = file->private_data;
2206         substream = pcm_file->substream;
2207         snd_assert(substream != NULL, return -ENXIO);
2208         pcm = substream->pcm;
2209         fasync_helper(-1, file, 0, &substream->runtime->fasync);
2210         mutex_lock(&pcm->open_mutex);
2211         snd_pcm_release_substream(substream);
2212         mutex_unlock(&pcm->open_mutex);
2213         wake_up(&pcm->open_wait);
2214         module_put(pcm->card->module);
2215         snd_card_file_remove(pcm->card, file);
2216         return 0;
2217 }
2218
2219 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2220                                                  snd_pcm_uframes_t frames)
2221 {
2222         struct snd_pcm_runtime *runtime = substream->runtime;
2223         snd_pcm_sframes_t appl_ptr;
2224         snd_pcm_sframes_t ret;
2225         snd_pcm_sframes_t hw_avail;
2226
2227         if (frames == 0)
2228                 return 0;
2229
2230         snd_pcm_stream_lock_irq(substream);
2231         switch (runtime->status->state) {
2232         case SNDRV_PCM_STATE_PREPARED:
2233                 break;
2234         case SNDRV_PCM_STATE_DRAINING:
2235         case SNDRV_PCM_STATE_RUNNING:
2236                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2237                         break;
2238                 /* Fall through */
2239         case SNDRV_PCM_STATE_XRUN:
2240                 ret = -EPIPE;
2241                 goto __end;
2242         default:
2243                 ret = -EBADFD;
2244                 goto __end;
2245         }
2246
2247         hw_avail = snd_pcm_playback_hw_avail(runtime);
2248         if (hw_avail <= 0) {
2249                 ret = 0;
2250                 goto __end;
2251         }
2252         if (frames > (snd_pcm_uframes_t)hw_avail)
2253                 frames = hw_avail;
2254         else
2255                 frames -= frames % runtime->xfer_align;
2256         appl_ptr = runtime->control->appl_ptr - frames;
2257         if (appl_ptr < 0)
2258                 appl_ptr += runtime->boundary;
2259         runtime->control->appl_ptr = appl_ptr;
2260         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2261             runtime->sleep_min)
2262                 snd_pcm_tick_prepare(substream);
2263         ret = frames;
2264  __end:
2265         snd_pcm_stream_unlock_irq(substream);
2266         return ret;
2267 }
2268
2269 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2270                                                 snd_pcm_uframes_t frames)
2271 {
2272         struct snd_pcm_runtime *runtime = substream->runtime;
2273         snd_pcm_sframes_t appl_ptr;
2274         snd_pcm_sframes_t ret;
2275         snd_pcm_sframes_t hw_avail;
2276
2277         if (frames == 0)
2278                 return 0;
2279
2280         snd_pcm_stream_lock_irq(substream);
2281         switch (runtime->status->state) {
2282         case SNDRV_PCM_STATE_PREPARED:
2283         case SNDRV_PCM_STATE_DRAINING:
2284                 break;
2285         case SNDRV_PCM_STATE_RUNNING:
2286                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2287                         break;
2288                 /* Fall through */
2289         case SNDRV_PCM_STATE_XRUN:
2290                 ret = -EPIPE;
2291                 goto __end;
2292         default:
2293                 ret = -EBADFD;
2294                 goto __end;
2295         }
2296
2297         hw_avail = snd_pcm_capture_hw_avail(runtime);
2298         if (hw_avail <= 0) {
2299                 ret = 0;
2300                 goto __end;
2301         }
2302         if (frames > (snd_pcm_uframes_t)hw_avail)
2303                 frames = hw_avail;
2304         else
2305                 frames -= frames % runtime->xfer_align;
2306         appl_ptr = runtime->control->appl_ptr - frames;
2307         if (appl_ptr < 0)
2308                 appl_ptr += runtime->boundary;
2309         runtime->control->appl_ptr = appl_ptr;
2310         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2311             runtime->sleep_min)
2312                 snd_pcm_tick_prepare(substream);
2313         ret = frames;
2314  __end:
2315         snd_pcm_stream_unlock_irq(substream);
2316         return ret;
2317 }
2318
2319 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2320                                                   snd_pcm_uframes_t frames)
2321 {
2322         struct snd_pcm_runtime *runtime = substream->runtime;
2323         snd_pcm_sframes_t appl_ptr;
2324         snd_pcm_sframes_t ret;
2325         snd_pcm_sframes_t avail;
2326
2327         if (frames == 0)
2328                 return 0;
2329
2330         snd_pcm_stream_lock_irq(substream);
2331         switch (runtime->status->state) {
2332         case SNDRV_PCM_STATE_PREPARED:
2333         case SNDRV_PCM_STATE_PAUSED:
2334                 break;
2335         case SNDRV_PCM_STATE_DRAINING:
2336         case SNDRV_PCM_STATE_RUNNING:
2337                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2338                         break;
2339                 /* Fall through */
2340         case SNDRV_PCM_STATE_XRUN:
2341                 ret = -EPIPE;
2342                 goto __end;
2343         default:
2344                 ret = -EBADFD;
2345                 goto __end;
2346         }
2347
2348         avail = snd_pcm_playback_avail(runtime);
2349         if (avail <= 0) {
2350                 ret = 0;
2351                 goto __end;
2352         }
2353         if (frames > (snd_pcm_uframes_t)avail)
2354                 frames = avail;
2355         else
2356                 frames -= frames % runtime->xfer_align;
2357         appl_ptr = runtime->control->appl_ptr + frames;
2358         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2359                 appl_ptr -= runtime->boundary;
2360         runtime->control->appl_ptr = appl_ptr;
2361         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2362             runtime->sleep_min)
2363                 snd_pcm_tick_prepare(substream);
2364         ret = frames;
2365  __end:
2366         snd_pcm_stream_unlock_irq(substream);
2367         return ret;
2368 }
2369
2370 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2371                                                  snd_pcm_uframes_t frames)
2372 {
2373         struct snd_pcm_runtime *runtime = substream->runtime;
2374         snd_pcm_sframes_t appl_ptr;
2375         snd_pcm_sframes_t ret;
2376         snd_pcm_sframes_t avail;
2377
2378         if (frames == 0)
2379                 return 0;
2380
2381         snd_pcm_stream_lock_irq(substream);
2382         switch (runtime->status->state) {
2383         case SNDRV_PCM_STATE_PREPARED:
2384         case SNDRV_PCM_STATE_DRAINING:
2385         case SNDRV_PCM_STATE_PAUSED:
2386                 break;
2387         case SNDRV_PCM_STATE_RUNNING:
2388                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2389                         break;
2390                 /* Fall through */
2391         case SNDRV_PCM_STATE_XRUN:
2392                 ret = -EPIPE;
2393                 goto __end;
2394         default:
2395                 ret = -EBADFD;
2396                 goto __end;
2397         }
2398
2399         avail = snd_pcm_capture_avail(runtime);
2400         if (avail <= 0) {
2401                 ret = 0;
2402                 goto __end;
2403         }
2404         if (frames > (snd_pcm_uframes_t)avail)
2405                 frames = avail;
2406         else
2407                 frames -= frames % runtime->xfer_align;
2408         appl_ptr = runtime->control->appl_ptr + frames;
2409         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2410                 appl_ptr -= runtime->boundary;
2411         runtime->control->appl_ptr = appl_ptr;
2412         if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2413             runtime->sleep_min)
2414                 snd_pcm_tick_prepare(substream);
2415         ret = frames;
2416  __end:
2417         snd_pcm_stream_unlock_irq(substream);
2418         return ret;
2419 }
2420
2421 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2422 {
2423         struct snd_pcm_runtime *runtime = substream->runtime;
2424         int err;
2425
2426         snd_pcm_stream_lock_irq(substream);
2427         switch (runtime->status->state) {
2428         case SNDRV_PCM_STATE_DRAINING:
2429                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2430                         goto __badfd;
2431         case SNDRV_PCM_STATE_RUNNING:
2432                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2433                         break;
2434                 /* Fall through */
2435         case SNDRV_PCM_STATE_PREPARED:
2436         case SNDRV_PCM_STATE_SUSPENDED:
2437                 err = 0;
2438                 break;
2439         case SNDRV_PCM_STATE_XRUN:
2440                 err = -EPIPE;
2441                 break;
2442         default:
2443               __badfd:
2444                 err = -EBADFD;
2445                 break;
2446         }
2447         snd_pcm_stream_unlock_irq(substream);
2448         return err;
2449 }
2450
2451 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2452                          snd_pcm_sframes_t __user *res)
2453 {
2454         struct snd_pcm_runtime *runtime = substream->runtime;
2455         int err;
2456         snd_pcm_sframes_t n = 0;
2457
2458         snd_pcm_stream_lock_irq(substream);
2459         switch (runtime->status->state) {
2460         case SNDRV_PCM_STATE_DRAINING:
2461                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2462                         goto __badfd;
2463         case SNDRV_PCM_STATE_RUNNING:
2464                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2465                         break;
2466                 /* Fall through */
2467         case SNDRV_PCM_STATE_PREPARED:
2468         case SNDRV_PCM_STATE_SUSPENDED:
2469                 err = 0;
2470                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2471                         n = snd_pcm_playback_hw_avail(runtime);
2472                 else
2473                         n = snd_pcm_capture_avail(runtime);
2474                 break;
2475         case SNDRV_PCM_STATE_XRUN:
2476                 err = -EPIPE;
2477                 break;
2478         default:
2479               __badfd:
2480                 err = -EBADFD;
2481                 break;
2482         }
2483         snd_pcm_stream_unlock_irq(substream);
2484         if (!err)
2485                 if (put_user(n, res))
2486                         err = -EFAULT;
2487         return err;
2488 }
2489
2490 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2491                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2492 {
2493         struct snd_pcm_runtime *runtime = substream->runtime;
2494         struct snd_pcm_sync_ptr sync_ptr;
2495         volatile struct snd_pcm_mmap_status *status;
2496         volatile struct snd_pcm_mmap_control *control;
2497         int err;
2498
2499         memset(&sync_ptr, 0, sizeof(sync_ptr));
2500         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2501                 return -EFAULT;
2502         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2503                 return -EFAULT;
2504         status = runtime->status;
2505         control = runtime->control;
2506         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2507                 err = snd_pcm_hwsync(substream);
2508                 if (err < 0)
2509                         return err;
2510         }
2511         snd_pcm_stream_lock_irq(substream);
2512         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2513                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2514         else
2515                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2516         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2517                 control->avail_min = sync_ptr.c.control.avail_min;
2518         else
2519                 sync_ptr.c.control.avail_min = control->avail_min;
2520         sync_ptr.s.status.state = status->state;
2521         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2522         sync_ptr.s.status.tstamp = status->tstamp;
2523         sync_ptr.s.status.suspended_state = status->suspended_state;
2524         snd_pcm_stream_unlock_irq(substream);
2525         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2526                 return -EFAULT;
2527         return 0;
2528 }
2529
2530 static int snd_pcm_common_ioctl1(struct file *file,
2531                                  struct snd_pcm_substream *substream,
2532                                  unsigned int cmd, void __user *arg)
2533 {
2534         snd_assert(substream != NULL, return -ENXIO);
2535
2536         switch (cmd) {
2537         case SNDRV_PCM_IOCTL_PVERSION:
2538                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2539         case SNDRV_PCM_IOCTL_INFO:
2540                 return snd_pcm_info_user(substream, arg);
2541         case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2542                 return 0;
2543         case SNDRV_PCM_IOCTL_HW_REFINE:
2544                 return snd_pcm_hw_refine_user(substream, arg);
2545         case SNDRV_PCM_IOCTL_HW_PARAMS:
2546                 return snd_pcm_hw_params_user(substream, arg);
2547         case SNDRV_PCM_IOCTL_HW_FREE:
2548                 return snd_pcm_hw_free(substream);
2549         case SNDRV_PCM_IOCTL_SW_PARAMS:
2550                 return snd_pcm_sw_params_user(substream, arg);
2551         case SNDRV_PCM_IOCTL_STATUS:
2552                 return snd_pcm_status_user(substream, arg);
2553         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2554                 return snd_pcm_channel_info_user(substream, arg);
2555         case SNDRV_PCM_IOCTL_PREPARE:
2556                 return snd_pcm_prepare(substream, file);
2557         case SNDRV_PCM_IOCTL_RESET:
2558                 return snd_pcm_reset(substream);
2559         case SNDRV_PCM_IOCTL_START:
2560                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2561         case SNDRV_PCM_IOCTL_LINK:
2562                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2563         case SNDRV_PCM_IOCTL_UNLINK:
2564                 return snd_pcm_unlink(substream);
2565         case SNDRV_PCM_IOCTL_RESUME:
2566                 return snd_pcm_resume(substream);
2567         case SNDRV_PCM_IOCTL_XRUN:
2568                 return snd_pcm_xrun(substream);
2569         case SNDRV_PCM_IOCTL_HWSYNC:
2570                 return snd_pcm_hwsync(substream);
2571         case SNDRV_PCM_IOCTL_DELAY:
2572                 return snd_pcm_delay(substream, arg);
2573         case SNDRV_PCM_IOCTL_SYNC_PTR:
2574                 return snd_pcm_sync_ptr(substream, arg);
2575 #ifdef CONFIG_SND_SUPPORT_OLD_API
2576         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2577                 return snd_pcm_hw_refine_old_user(substream, arg);
2578         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2579                 return snd_pcm_hw_params_old_user(substream, arg);
2580 #endif
2581         case SNDRV_PCM_IOCTL_DRAIN:
2582                 return snd_pcm_drain(substream);
2583         case SNDRV_PCM_IOCTL_DROP:
2584                 return snd_pcm_drop(substream);
2585         case SNDRV_PCM_IOCTL_PAUSE:
2586         {
2587                 int res;
2588                 snd_pcm_stream_lock_irq(substream);
2589                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2590                 snd_pcm_stream_unlock_irq(substream);
2591                 return res;
2592         }
2593         }
2594         snd_printd("unknown ioctl = 0x%x\n", cmd);
2595         return -ENOTTY;
2596 }
2597
2598 static int snd_pcm_playback_ioctl1(struct file *file,
2599                                    struct snd_pcm_substream *substream,
2600                                    unsigned int cmd, void __user *arg)
2601 {
2602         snd_assert(substream != NULL, return -ENXIO);
2603         snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2604         switch (cmd) {
2605         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2606         {
2607                 struct snd_xferi xferi;
2608                 struct snd_xferi __user *_xferi = arg;
2609                 struct snd_pcm_runtime *runtime = substream->runtime;
2610                 snd_pcm_sframes_t result;
2611                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2612                         return -EBADFD;
2613                 if (put_user(0, &_xferi->result))
2614                         return -EFAULT;
2615                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2616                         return -EFAULT;
2617                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2618                 __put_user(result, &_xferi->result);
2619                 return result < 0 ? result : 0;
2620         }
2621         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2622         {
2623                 struct snd_xfern xfern;
2624                 struct snd_xfern __user *_xfern = arg;
2625                 struct snd_pcm_runtime *runtime = substream->runtime;
2626                 void __user **bufs;
2627                 snd_pcm_sframes_t result;
2628                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2629                         return -EBADFD;
2630                 if (runtime->channels > 128)
2631                         return -EINVAL;
2632                 if (put_user(0, &_xfern->result))
2633                         return -EFAULT;
2634                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2635                         return -EFAULT;
2636                 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2637                 if (bufs == NULL)
2638                         return -ENOMEM;
2639                 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2640                         kfree(bufs);
2641                         return -EFAULT;
2642                 }
2643                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2644                 kfree(bufs);
2645                 __put_user(result, &_xfern->result);
2646                 return result < 0 ? result : 0;
2647         }
2648         case SNDRV_PCM_IOCTL_REWIND:
2649         {
2650                 snd_pcm_uframes_t frames;
2651                 snd_pcm_uframes_t __user *_frames = arg;
2652                 snd_pcm_sframes_t result;
2653                 if (get_user(frames, _frames))
2654                         return -EFAULT;
2655                 if (put_user(0, _frames))
2656                         return -EFAULT;
2657                 result = snd_pcm_playback_rewind(substream, frames);
2658                 __put_user(result, _frames);
2659                 return result < 0 ? result : 0;
2660         }
2661         case SNDRV_PCM_IOCTL_FORWARD:
2662         {
2663                 snd_pcm_uframes_t frames;
2664                 snd_pcm_uframes_t __user *_frames = arg;
2665                 snd_pcm_sframes_t result;
2666                 if (get_user(frames, _frames))
2667                         return -EFAULT;
2668                 if (put_user(0, _frames))
2669                         return -EFAULT;
2670                 result = snd_pcm_playback_forward(substream, frames);
2671                 __put_user(result, _frames);
2672                 return result < 0 ? result : 0;
2673         }
2674         }
2675         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2676 }
2677
2678 static int snd_pcm_capture_ioctl1(struct file *file,
2679                                   struct snd_pcm_substream *substream,
2680                                   unsigned int cmd, void __user *arg)
2681 {
2682         snd_assert(substream != NULL, return -ENXIO);
2683         snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2684         switch (cmd) {
2685         case SNDRV_PCM_IOCTL_READI_FRAMES:
2686         {
2687                 struct snd_xferi xferi;
2688                 struct snd_xferi __user *_xferi = arg;
2689                 struct snd_pcm_runtime *runtime = substream->runtime;
2690                 snd_pcm_sframes_t result;
2691                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2692                         return -EBADFD;
2693                 if (put_user(0, &_xferi->result))
2694                         return -EFAULT;
2695                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2696                         return -EFAULT;
2697                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2698                 __put_user(result, &_xferi->result);
2699                 return result < 0 ? result : 0;
2700         }
2701         case SNDRV_PCM_IOCTL_READN_FRAMES:
2702         {
2703                 struct snd_xfern xfern;
2704                 struct snd_xfern __user *_xfern = arg;
2705                 struct snd_pcm_runtime *runtime = substream->runtime;
2706                 void *bufs;
2707                 snd_pcm_sframes_t result;
2708                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2709                         return -EBADFD;
2710                 if (runtime->channels > 128)
2711                         return -EINVAL;
2712                 if (put_user(0, &_xfern->result))
2713                         return -EFAULT;
2714                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2715                         return -EFAULT;
2716                 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2717                 if (bufs == NULL)
2718                         return -ENOMEM;
2719                 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2720                         kfree(bufs);
2721                         return -EFAULT;
2722                 }
2723                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2724                 kfree(bufs);
2725                 __put_user(result, &_xfern->result);
2726                 return result < 0 ? result : 0;
2727         }
2728         case SNDRV_PCM_IOCTL_REWIND:
2729         {
2730                 snd_pcm_uframes_t frames;
2731                 snd_pcm_uframes_t __user *_frames = arg;
2732                 snd_pcm_sframes_t result;
2733                 if (get_user(frames, _frames))
2734                         return -EFAULT;
2735                 if (put_user(0, _frames))
2736                         return -EFAULT;
2737                 result = snd_pcm_capture_rewind(substream, frames);
2738                 __put_user(result, _frames);
2739                 return result < 0 ? result : 0;
2740         }
2741         case SNDRV_PCM_IOCTL_FORWARD:
2742         {
2743                 snd_pcm_uframes_t frames;
2744                 snd_pcm_uframes_t __user *_frames = arg;
2745                 snd_pcm_sframes_t result;
2746                 if (get_user(frames, _frames))
2747                         return -EFAULT;
2748                 if (put_user(0, _frames))
2749                         return -EFAULT;
2750                 result = snd_pcm_capture_forward(substream, frames);
2751                 __put_user(result, _frames);
2752                 return result < 0 ? result : 0;
2753         }
2754         }
2755         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2756 }
2757
2758 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2759                                    unsigned long arg)
2760 {
2761         struct snd_pcm_file *pcm_file;
2762
2763         pcm_file = file->private_data;
2764
2765         if (((cmd >> 8) & 0xff) != 'A')
2766                 return -ENOTTY;
2767
2768         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2769                                        (void __user *)arg);
2770 }
2771
2772 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2773                                   unsigned long arg)
2774 {
2775         struct snd_pcm_file *pcm_file;
2776
2777         pcm_file = file->private_data;
2778
2779         if (((cmd >> 8) & 0xff) != 'A')
2780                 return -ENOTTY;
2781
2782         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2783                                       (void __user *)arg);
2784 }
2785
2786 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2787                          unsigned int cmd, void *arg)
2788 {
2789         mm_segment_t fs;
2790         int result;
2791
2792         fs = snd_enter_user();
2793         switch (substream->stream) {
2794         case SNDRV_PCM_STREAM_PLAYBACK:
2795                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2796                                                  (void __user *)arg);
2797                 break;
2798         case SNDRV_PCM_STREAM_CAPTURE:
2799                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2800                                                 (void __user *)arg);
2801                 break;
2802         default:
2803                 result = -EINVAL;
2804                 break;
2805         }
2806         snd_leave_user(fs);
2807         return result;
2808 }
2809
2810 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2811
2812 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2813                             loff_t * offset)
2814 {
2815         struct snd_pcm_file *pcm_file;
2816         struct snd_pcm_substream *substream;
2817         struct snd_pcm_runtime *runtime;
2818         snd_pcm_sframes_t result;
2819
2820         pcm_file = file->private_data;
2821         substream = pcm_file->substream;
2822         snd_assert(substream != NULL, return -ENXIO);
2823         runtime = substream->runtime;
2824         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2825                 return -EBADFD;
2826         if (!frame_aligned(runtime, count))
2827                 return -EINVAL;
2828         count = bytes_to_frames(runtime, count);
2829         result = snd_pcm_lib_read(substream, buf, count);
2830         if (result > 0)
2831                 result = frames_to_bytes(runtime, result);
2832         return result;
2833 }
2834
2835 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2836                              size_t count, loff_t * offset)
2837 {
2838         struct snd_pcm_file *pcm_file;
2839         struct snd_pcm_substream *substream;
2840         struct snd_pcm_runtime *runtime;
2841         snd_pcm_sframes_t result;
2842
2843         pcm_file = file->private_data;
2844         substream = pcm_file->substream;
2845         snd_assert(substream != NULL, result = -ENXIO; goto end);
2846         runtime = substream->runtime;
2847         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2848                 result = -EBADFD;
2849                 goto end;
2850         }
2851         if (!frame_aligned(runtime, count)) {
2852                 result = -EINVAL;
2853                 goto end;
2854         }
2855         count = bytes_to_frames(runtime, count);
2856         result = snd_pcm_lib_write(substream, buf, count);
2857         if (result > 0)
2858                 result = frames_to_bytes(runtime, result);
2859  end:
2860         return result;
2861 }
2862
2863 static ssize_t snd_pcm_readv(struct file *file, const struct iovec *_vector,
2864                              unsigned long count, loff_t * offset)
2865
2866 {
2867         struct snd_pcm_file *pcm_file;
2868         struct snd_pcm_substream *substream;
2869         struct snd_pcm_runtime *runtime;
2870         snd_pcm_sframes_t result;
2871         unsigned long i;
2872         void __user **bufs;
2873         snd_pcm_uframes_t frames;
2874
2875         pcm_file = file->private_data;
2876         substream = pcm_file->substream;
2877         snd_assert(substream != NULL, return -ENXIO);
2878         runtime = substream->runtime;
2879         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2880                 return -EBADFD;
2881         if (count > 1024 || count != runtime->channels)
2882                 return -EINVAL;
2883         if (!frame_aligned(runtime, _vector->iov_len))
2884                 return -EINVAL;
2885         frames = bytes_to_samples(runtime, _vector->iov_len);
2886         bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2887         if (bufs == NULL)
2888                 return -ENOMEM;
2889         for (i = 0; i < count; ++i)
2890                 bufs[i] = _vector[i].iov_base;
2891         result = snd_pcm_lib_readv(substream, bufs, frames);
2892         if (result > 0)
2893                 result = frames_to_bytes(runtime, result);
2894         kfree(bufs);
2895         return result;
2896 }
2897
2898 static ssize_t snd_pcm_writev(struct file *file, const struct iovec *_vector,
2899                               unsigned long count, loff_t * offset)
2900 {
2901         struct snd_pcm_file *pcm_file;
2902         struct snd_pcm_substream *substream;
2903         struct snd_pcm_runtime *runtime;
2904         snd_pcm_sframes_t result;
2905         unsigned long i;
2906         void __user **bufs;
2907         snd_pcm_uframes_t frames;
2908
2909         pcm_file = file->private_data;
2910         substream = pcm_file->substream;
2911         snd_assert(substream != NULL, result = -ENXIO; goto end);
2912         runtime = substream->runtime;
2913         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2914                 result = -EBADFD;
2915                 goto end;
2916         }
2917         if (count > 128 || count != runtime->channels ||
2918             !frame_aligned(runtime, _vector->iov_len)) {
2919                 result = -EINVAL;
2920                 goto end;
2921         }
2922         frames = bytes_to_samples(runtime, _vector->iov_len);
2923         bufs = kmalloc(sizeof(void *) * count, GFP_KERNEL);
2924         if (bufs == NULL)
2925                 return -ENOMEM;
2926         for (i = 0; i < count; ++i)
2927                 bufs[i] = _vector[i].iov_base;
2928         result = snd_pcm_lib_writev(substream, bufs, frames);
2929         if (result > 0)
2930                 result = frames_to_bytes(runtime, result);
2931         kfree(bufs);
2932  end:
2933         return result;
2934 }
2935
2936 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2937 {
2938         struct snd_pcm_file *pcm_file;
2939         struct snd_pcm_substream *substream;
2940         struct snd_pcm_runtime *runtime;
2941         unsigned int mask;
2942         snd_pcm_uframes_t avail;
2943
2944         pcm_file = file->private_data;
2945
2946         substream = pcm_file->substream;
2947         snd_assert(substream != NULL, return -ENXIO);
2948         runtime = substream->runtime;
2949
2950         poll_wait(file, &runtime->sleep, wait);
2951
2952         snd_pcm_stream_lock_irq(substream);
2953         avail = snd_pcm_playback_avail(runtime);
2954         switch (runtime->status->state) {
2955         case SNDRV_PCM_STATE_RUNNING:
2956         case SNDRV_PCM_STATE_PREPARED:
2957         case SNDRV_PCM_STATE_PAUSED:
2958                 if (avail >= runtime->control->avail_min) {
2959                         mask = POLLOUT | POLLWRNORM;
2960                         break;
2961                 }
2962                 /* Fall through */
2963         case SNDRV_PCM_STATE_DRAINING:
2964                 mask = 0;
2965                 break;
2966         default:
2967                 mask = POLLOUT | POLLWRNORM | POLLERR;
2968                 break;
2969         }
2970         snd_pcm_stream_unlock_irq(substream);
2971         return mask;
2972 }
2973
2974 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2975 {
2976         struct snd_pcm_file *pcm_file;
2977         struct snd_pcm_substream *substream;
2978         struct snd_pcm_runtime *runtime;
2979         unsigned int mask;
2980         snd_pcm_uframes_t avail;
2981
2982         pcm_file = file->private_data;
2983
2984         substream = pcm_file->substream;
2985         snd_assert(substream != NULL, return -ENXIO);
2986         runtime = substream->runtime;
2987
2988         poll_wait(file, &runtime->sleep, wait);
2989
2990         snd_pcm_stream_lock_irq(substream);
2991         avail = snd_pcm_capture_avail(runtime);
2992         switch (runtime->status->state) {
2993         case SNDRV_PCM_STATE_RUNNING:
2994         case SNDRV_PCM_STATE_PREPARED:
2995         case SNDRV_PCM_STATE_PAUSED:
2996                 if (avail >= runtime->control->avail_min) {
2997                         mask = POLLIN | POLLRDNORM;
2998                         break;
2999                 }
3000                 mask = 0;
3001                 break;
3002         case SNDRV_PCM_STATE_DRAINING:
3003                 if (avail > 0) {
3004                         mask = POLLIN | POLLRDNORM;
3005                         break;
3006                 }
3007                 /* Fall through */
3008         default:
3009                 mask = POLLIN | POLLRDNORM | POLLERR;
3010                 break;
3011         }
3012         snd_pcm_stream_unlock_irq(substream);
3013         return mask;
3014 }
3015
3016 /*
3017  * mmap support
3018  */
3019
3020 /*
3021  * Only on coherent architectures, we can mmap the status and the control records
3022  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
3023  */
3024 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3025 /*
3026  * mmap status record
3027  */
3028 static struct page * snd_pcm_mmap_status_nopage(struct vm_area_struct *area,
3029                                                 unsigned long address, int *type)
3030 {
3031         struct snd_pcm_substream *substream = area->vm_private_data;
3032         struct snd_pcm_runtime *runtime;
3033         struct page * page;
3034
3035         if (substream == NULL)
3036                 return NOPAGE_OOM;
3037         runtime = substream->runtime;
3038         page = virt_to_page(runtime->status);
3039         get_page(page);
3040         if (type)
3041                 *type = VM_FAULT_MINOR;
3042         return page;
3043 }
3044
3045 static struct vm_operations_struct snd_pcm_vm_ops_status =
3046 {
3047         .nopage =       snd_pcm_mmap_status_nopage,
3048 };
3049
3050 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3051                                struct vm_area_struct *area)
3052 {
3053         struct snd_pcm_runtime *runtime;
3054         long size;
3055         if (!(area->vm_flags & VM_READ))
3056                 return -EINVAL;
3057         runtime = substream->runtime;
3058         snd_assert(runtime != NULL, return -EAGAIN);
3059         size = area->vm_end - area->vm_start;
3060         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3061                 return -EINVAL;
3062         area->vm_ops = &snd_pcm_vm_ops_status;
3063         area->vm_private_data = substream;
3064         area->vm_flags |= VM_RESERVED;
3065         return 0;
3066 }
3067
3068 /*
3069  * mmap control record
3070  */
3071 static struct page * snd_pcm_mmap_control_nopage(struct vm_area_struct *area,
3072                                                  unsigned long address, int *type)
3073 {
3074         struct snd_pcm_substream *substream = area->vm_private_data;
3075         struct snd_pcm_runtime *runtime;
3076         struct page * page;
3077
3078         if (substream == NULL)
3079                 return NOPAGE_OOM;
3080         runtime = substream->runtime;
3081         page = virt_to_page(runtime->control);
3082         get_page(page);
3083         if (type)
3084                 *type = VM_FAULT_MINOR;
3085         return page;
3086 }
3087
3088 static struct vm_operations_struct snd_pcm_vm_ops_control =
3089 {
3090         .nopage =       snd_pcm_mmap_control_nopage,
3091 };
3092
3093 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3094                                 struct vm_area_struct *area)
3095 {
3096         struct snd_pcm_runtime *runtime;
3097         long size;
3098         if (!(area->vm_flags & VM_READ))
3099                 return -EINVAL;
3100         runtime = substream->runtime;
3101         snd_assert(runtime != NULL, return -EAGAIN);
3102         size = area->vm_end - area->vm_start;
3103         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3104                 return -EINVAL;
3105         area->vm_ops = &snd_pcm_vm_ops_control;
3106         area->vm_private_data = substream;
3107         area->vm_flags |= VM_RESERVED;
3108         return 0;
3109 }
3110 #else /* ! coherent mmap */
3111 /*
3112  * don't support mmap for status and control records.
3113  */
3114 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3115                                struct vm_area_struct *area)
3116 {
3117         return -ENXIO;
3118 }
3119 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3120                                 struct vm_area_struct *area)
3121 {
3122         return -ENXIO;
3123 }
3124 #endif /* coherent mmap */
3125
3126 /*
3127  * nopage callback for mmapping a RAM page
3128  */
3129 static struct page *snd_pcm_mmap_data_nopage(struct vm_area_struct *area,
3130                                              unsigned long address, int *type)
3131 {
3132         struct snd_pcm_substream *substream = area->vm_private_data;
3133         struct snd_pcm_runtime *runtime;
3134         unsigned long offset;
3135         struct page * page;
3136         void *vaddr;
3137         size_t dma_bytes;
3138
3139         if (substream == NULL)
3140                 return NOPAGE_OOM;
3141         runtime = substream->runtime;
3142         offset = area->vm_pgoff << PAGE_SHIFT;
3143         offset += address - area->vm_start;
3144         snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
3145         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3146         if (offset > dma_bytes - PAGE_SIZE)
3147                 return NOPAGE_SIGBUS;
3148         if (substream->ops->page) {
3149                 page = substream->ops->page(substream, offset);
3150                 if (! page)
3151                         return NOPAGE_OOM;
3152         } else {
3153                 vaddr = runtime->dma_area + offset;
3154                 page = virt_to_page(vaddr);
3155         }
3156         get_page(page);
3157         if (type)
3158                 *type = VM_FAULT_MINOR;
3159         return page;
3160 }
3161
3162 static struct vm_operations_struct snd_pcm_vm_ops_data =
3163 {
3164         .open =         snd_pcm_mmap_data_open,
3165         .close =        snd_pcm_mmap_data_close,
3166         .nopage =       snd_pcm_mmap_data_nopage,
3167 };
3168
3169 /*
3170  * mmap the DMA buffer on RAM
3171  */
3172 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3173                                 struct vm_area_struct *area)
3174 {
3175         area->vm_ops = &snd_pcm_vm_ops_data;
3176         area->vm_private_data = substream;
3177         area->vm_flags |= VM_RESERVED;
3178         atomic_inc(&substream->mmap_count);
3179         return 0;
3180 }
3181
3182 /*
3183  * mmap the DMA buffer on I/O memory area
3184  */
3185 #if SNDRV_PCM_INFO_MMAP_IOMEM
3186 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3187 {
3188         .open =         snd_pcm_mmap_data_open,
3189         .close =        snd_pcm_mmap_data_close,
3190 };
3191
3192 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3193                            struct vm_area_struct *area)
3194 {
3195         long size;
3196         unsigned long offset;
3197
3198 #ifdef pgprot_noncached
3199         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3200 #endif
3201         area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3202         area->vm_private_data = substream;
3203         area->vm_flags |= VM_IO;
3204         size = area->vm_end - area->vm_start;
3205         offset = area->vm_pgoff << PAGE_SHIFT;
3206         if (io_remap_pfn_range(area, area->vm_start,
3207                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3208                                 size, area->vm_page_prot))
3209                 return -EAGAIN;
3210         atomic_inc(&substream->mmap_count);
3211         return 0;
3212 }
3213
3214 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3215 #endif /* SNDRV_PCM_INFO_MMAP */
3216
3217 /*
3218  * mmap DMA buffer
3219  */
3220 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3221                       struct vm_area_struct *area)
3222 {
3223         struct snd_pcm_runtime *runtime;
3224         long size;
3225         unsigned long offset;
3226         size_t dma_bytes;
3227
3228         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3229                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3230                         return -EINVAL;
3231         } else {
3232                 if (!(area->vm_flags & VM_READ))
3233                         return -EINVAL;
3234         }
3235         runtime = substream->runtime;
3236         snd_assert(runtime != NULL, return -EAGAIN);
3237         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3238                 return -EBADFD;
3239         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3240                 return -ENXIO;
3241         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3242             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3243                 return -EINVAL;
3244         size = area->vm_end - area->vm_start;
3245         offset = area->vm_pgoff << PAGE_SHIFT;
3246         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3247         if ((size_t)size > dma_bytes)
3248                 return -EINVAL;
3249         if (offset > dma_bytes - size)
3250                 return -EINVAL;
3251
3252         if (substream->ops->mmap)
3253                 return substream->ops->mmap(substream, area);
3254         else
3255                 return snd_pcm_default_mmap(substream, area);
3256 }
3257
3258 EXPORT_SYMBOL(snd_pcm_mmap_data);
3259
3260 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3261 {
3262         struct snd_pcm_file * pcm_file;
3263         struct snd_pcm_substream *substream;
3264         unsigned long offset;
3265
3266         pcm_file = file->private_data;
3267         substream = pcm_file->substream;
3268         snd_assert(substream != NULL, return -ENXIO);
3269
3270         offset = area->vm_pgoff << PAGE_SHIFT;
3271         switch (offset) {
3272         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3273                 if (substream->no_mmap_ctrl)
3274                         return -ENXIO;
3275                 return snd_pcm_mmap_status(substream, file, area);
3276         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3277                 if (substream->no_mmap_ctrl)
3278                         return -ENXIO;
3279                 return snd_pcm_mmap_control(substream, file, area);
3280         default:
3281                 return snd_pcm_mmap_data(substream, file, area);
3282         }
3283         return 0;
3284 }
3285
3286 static int snd_pcm_fasync(int fd, struct file * file, int on)
3287 {
3288         struct snd_pcm_file * pcm_file;
3289         struct snd_pcm_substream *substream;
3290         struct snd_pcm_runtime *runtime;
3291         int err;
3292
3293         pcm_file = file->private_data;
3294         substream = pcm_file->substream;
3295         snd_assert(substream != NULL, return -ENXIO);
3296         runtime = substream->runtime;
3297
3298         err = fasync_helper(fd, file, on, &runtime->fasync);
3299         if (err < 0)
3300                 return err;
3301         return 0;
3302 }
3303
3304 /*
3305  * ioctl32 compat
3306  */
3307 #ifdef CONFIG_COMPAT
3308 #include "pcm_compat.c"
3309 #else
3310 #define snd_pcm_ioctl_compat    NULL
3311 #endif
3312
3313 /*
3314  *  To be removed helpers to keep binary compatibility
3315  */
3316
3317 #ifdef CONFIG_SND_SUPPORT_OLD_API
3318 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3319 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3320
3321 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3322                                                struct snd_pcm_hw_params_old *oparams)
3323 {
3324         unsigned int i;
3325
3326         memset(params, 0, sizeof(*params));
3327         params->flags = oparams->flags;
3328         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3329                 params->masks[i].bits[0] = oparams->masks[i];
3330         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3331         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3332         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3333         params->info = oparams->info;
3334         params->msbits = oparams->msbits;
3335         params->rate_num = oparams->rate_num;
3336         params->rate_den = oparams->rate_den;
3337         params->fifo_size = oparams->fifo_size;
3338 }
3339
3340 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3341                                              struct snd_pcm_hw_params *params)
3342 {
3343         unsigned int i;
3344
3345         memset(oparams, 0, sizeof(*oparams));
3346         oparams->flags = params->flags;
3347         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3348                 oparams->masks[i] = params->masks[i].bits[0];
3349         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3350         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3351         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3352         oparams->info = params->info;
3353         oparams->msbits = params->msbits;
3354         oparams->rate_num = params->rate_num;
3355         oparams->rate_den = params->rate_den;
3356         oparams->fifo_size = params->fifo_size;
3357 }
3358
3359 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3360                                       struct snd_pcm_hw_params_old __user * _oparams)
3361 {
3362         struct snd_pcm_hw_params *params;
3363         struct snd_pcm_hw_params_old *oparams = NULL;
3364         int err;
3365
3366         params = kmalloc(sizeof(*params), GFP_KERNEL);
3367         if (!params) {
3368                 err = -ENOMEM;
3369                 goto out;
3370         }
3371         oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3372         if (!oparams) {
3373                 err = -ENOMEM;
3374                 goto out;
3375         }
3376
3377         if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3378                 err = -EFAULT;
3379                 goto out;
3380         }
3381         snd_pcm_hw_convert_from_old_params(params, oparams);
3382         err = snd_pcm_hw_refine(substream, params);
3383         snd_pcm_hw_convert_to_old_params(oparams, params);
3384         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3385                 if (!err)
3386                         err = -EFAULT;
3387         }
3388 out:
3389         kfree(params);
3390         kfree(oparams);
3391         return err;
3392 }
3393
3394 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3395                                       struct snd_pcm_hw_params_old __user * _oparams)
3396 {
3397         struct snd_pcm_hw_params *params;
3398         struct snd_pcm_hw_params_old *oparams = NULL;
3399         int err;
3400
3401         params = kmalloc(sizeof(*params), GFP_KERNEL);
3402         if (!params) {
3403                 err = -ENOMEM;
3404                 goto out;
3405         }
3406         oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3407         if (!oparams) {
3408                 err = -ENOMEM;
3409                 goto out;
3410         }
3411         if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3412                 err = -EFAULT;
3413                 goto out;
3414         }
3415         snd_pcm_hw_convert_from_old_params(params, oparams);
3416         err = snd_pcm_hw_params(substream, params);
3417         snd_pcm_hw_convert_to_old_params(oparams, params);
3418         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3419                 if (!err)
3420                         err = -EFAULT;
3421         }
3422 out:
3423         kfree(params);
3424         kfree(oparams);
3425         return err;
3426 }
3427 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3428
3429 /*
3430  *  Register section
3431  */
3432
3433 struct file_operations snd_pcm_f_ops[2] = {
3434         {
3435                 .owner =                THIS_MODULE,
3436                 .write =                snd_pcm_write,
3437                 .writev =               snd_pcm_writev,
3438                 .open =                 snd_pcm_playback_open,
3439                 .release =              snd_pcm_release,
3440                 .poll =                 snd_pcm_playback_poll,
3441                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3442                 .compat_ioctl =         snd_pcm_ioctl_compat,
3443                 .mmap =                 snd_pcm_mmap,
3444                 .fasync =               snd_pcm_fasync,
3445         },
3446         {
3447                 .owner =                THIS_MODULE,
3448                 .read =                 snd_pcm_read,
3449                 .readv =                snd_pcm_readv,
3450                 .open =                 snd_pcm_capture_open,
3451                 .release =              snd_pcm_release,
3452                 .poll =                 snd_pcm_capture_poll,
3453                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3454                 .compat_ioctl =         snd_pcm_ioctl_compat,
3455                 .mmap =                 snd_pcm_mmap,
3456                 .fasync =               snd_pcm_fasync,
3457         }
3458 };