sound/core/pcm_native.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include <linux/mm.h>
  23 #include <linux/module.h>
  24 #include <linux/file.h>
  25 #include <linux/slab.h>
  26 #include <linux/time.h>
  27 #include <linux/pm_qos.h>
  28 #include <linux/uio.h>
  29 #include <linux/dma-mapping.h>
  30 #include <sound/core.h>
  31 #include <sound/control.h>
  32 #include <sound/info.h>
  33 #include <sound/pcm.h>
  34 #include <sound/pcm_params.h>
  35 #include <sound/timer.h>
  36 #include <sound/minors.h>
  37 #include <asm/io.h>
  38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
  39 #include <dma-coherence.h>
  40 #endif
  41
  42 /*
  43  *  Compatibility
  44  */
  45
  46 struct snd_pcm_hw_params_old {
  47         unsigned int flags;
  48         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
  49                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
  50         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
  51                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
  52         unsigned int rmask;
  53         unsigned int cmask;
  54         unsigned int info;
  55         unsigned int msbits;
  56         unsigned int rate_num;
  57         unsigned int rate_den;
  58         snd_pcm_uframes_t fifo_size;
  59         unsigned char reserved[64];
  60 };
  61
  62 #ifdef CONFIG_SND_SUPPORT_OLD_API
  63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
  64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
  65
  66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
  67                                       struct snd_pcm_hw_params_old __user * _oparams);
  68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
  69                                       struct snd_pcm_hw_params_old __user * _oparams);
  70 #endif
  71 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
  72
  73 /*
  74  *
  75  */
  76
  77 DEFINE_RWLOCK(snd_pcm_link_rwlock);
  78 EXPORT_SYMBOL(snd_pcm_link_rwlock);
  79
  80 static DECLARE_RWSEM(snd_pcm_link_rwsem);
  81
  82 static inline mm_segment_t snd_enter_user(void)
  83 {
  84         mm_segment_t fs = get_fs();
  85         set_fs(get_ds());
  86         return fs;
  87 }
  88
  89 static inline void snd_leave_user(mm_segment_t fs)
  90 {
  91         set_fs(fs);
  92 }
  93
  94
  95
  96 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
  97 {
  98         struct snd_pcm_runtime *runtime;
  99         struct snd_pcm *pcm = substream->pcm;
 100         struct snd_pcm_str *pstr = substream->pstr;
 101
 102         memset(info, 0, sizeof(*info));
 103         info->card = pcm->card->number;
 104         info->device = pcm->device;
 105         info->stream = substream->stream;
 106         info->subdevice = substream->number;
 107         strlcpy(info->id, pcm->id, sizeof(info->id));
 108         strlcpy(info->name, pcm->name, sizeof(info->name));
 109         info->dev_class = pcm->dev_class;
 110         info->dev_subclass = pcm->dev_subclass;
 111         info->subdevices_count = pstr->substream_count;
 112         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 113         strlcpy(info->subname, substream->name, sizeof(info->subname));
 114         runtime = substream->runtime;
 115         /* AB: FIXME!!! This is definitely nonsense */
 116         if (runtime) {
 117                 info->sync = runtime->sync;
 118                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
 119         }
 120         return 0;
 121 }
 122
 123 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 124                       struct snd_pcm_info __user * _info)
 125 {
 126         struct snd_pcm_info *info;
 127         int err;
 128
 129         info = kmalloc(sizeof(*info), GFP_KERNEL);
 130         if (! info)
 131                 return -ENOMEM;
 132         err = snd_pcm_info(substream, info);
 133         if (err >= 0) {
 134                 if (copy_to_user(_info, info, sizeof(*info)))
 135                         err = -EFAULT;
 136         }
 137         kfree(info);
 138         return err;
 139 }
 140
 141 #undef RULES_DEBUG
 142
 143 #ifdef RULES_DEBUG
 144 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
 145 static const char * const snd_pcm_hw_param_names[] = {
 146         HW_PARAM(ACCESS),
 147         HW_PARAM(FORMAT),
 148         HW_PARAM(SUBFORMAT),
 149         HW_PARAM(SAMPLE_BITS),
 150         HW_PARAM(FRAME_BITS),
 151         HW_PARAM(CHANNELS),
 152         HW_PARAM(RATE),
 153         HW_PARAM(PERIOD_TIME),
 154         HW_PARAM(PERIOD_SIZE),
 155         HW_PARAM(PERIOD_BYTES),
 156         HW_PARAM(PERIODS),
 157         HW_PARAM(BUFFER_TIME),
 158         HW_PARAM(BUFFER_SIZE),
 159         HW_PARAM(BUFFER_BYTES),
 160         HW_PARAM(TICK_TIME),
 161 };
 162 #endif
 163
 164 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
 165                       struct snd_pcm_hw_params *params)
 166 {
 167         unsigned int k;
 168         struct snd_pcm_hardware *hw;
 169         struct snd_interval *i = NULL;
 170         struct snd_mask *m = NULL;
 171         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
 172         unsigned int rstamps[constrs->rules_num];
 173         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 174         unsigned int stamp = 2;
 175         int changed, again;
 176
 177         params->info = 0;
 178         params->fifo_size = 0;
 179         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
 180                 params->msbits = 0;
 181         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
 182                 params->rate_num = 0;
 183                 params->rate_den = 0;
 184         }
 185
 186         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
 187                 m = hw_param_mask(params, k);
 188                 if (snd_mask_empty(m))
 189                         return -EINVAL;
 190                 if (!(params->rmask & (1 << k)))
 191                         continue;
 192 #ifdef RULES_DEBUG
 193                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 194                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 195 #endif
 196                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
 197 #ifdef RULES_DEBUG
 198                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 199 #endif
 200                 if (changed)
 201                         params->cmask |= 1 << k;
 202                 if (changed < 0)
 203                         return changed;
 204         }
 205
 206         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
 207                 i = hw_param_interval(params, k);
 208                 if (snd_interval_empty(i))
 209                         return -EINVAL;
 210                 if (!(params->rmask & (1 << k)))
 211                         continue;
 212 #ifdef RULES_DEBUG
 213                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 214                 if (i->empty)
 215                         printk("empty");
 216                 else
 217                         printk("%c%u %u%c",
 218                                i->openmin ? '(' : '[', i->min,
 219                                i->max, i->openmax ? ')' : ']');
 220                 printk(" -> ");
 221 #endif
 222                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
 223 #ifdef RULES_DEBUG
 224                 if (i->empty)
 225                         printk("empty\n");
 226                 else
 227                         printk("%c%u %u%c\n",
 228                                i->openmin ? '(' : '[', i->min,
 229                                i->max, i->openmax ? ')' : ']');
 230 #endif
 231                 if (changed)
 232                         params->cmask |= 1 << k;
 233                 if (changed < 0)
 234                         return changed;
 235         }
 236
 237         for (k = 0; k < constrs->rules_num; k++)
 238                 rstamps[k] = 0;
 239         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
 240                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
 241         do {
 242                 again = 0;
 243                 for (k = 0; k < constrs->rules_num; k++) {
 244                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
 245                         unsigned int d;
 246                         int doit = 0;
 247                         if (r->cond && !(r->cond & params->flags))
 248                                 continue;
 249                         for (d = 0; r->deps[d] >= 0; d++) {
 250                                 if (vstamps[r->deps[d]] > rstamps[k]) {
 251                                         doit = 1;
 252                                         break;
 253                                 }
 254                         }
 255                         if (!doit)
 256                                 continue;
 257 #ifdef RULES_DEBUG
 258                         printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
 259                         if (r->var >= 0) {
 260                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
 261                                 if (hw_is_mask(r->var)) {
 262                                         m = hw_param_mask(params, r->var);
 263                                         printk("%x", *m->bits);
 264                                 } else {
 265                                         i = hw_param_interval(params, r->var);
 266                                         if (i->empty)
 267                                                 printk("empty");
 268                                         else
 269                                                 printk("%c%u %u%c",
 270                                                        i->openmin ? '(' : '[', i->min,
 271                                                        i->max, i->openmax ? ')' : ']');
 272                                 }
 273                         }
 274 #endif
 275                         changed = r->func(params, r);
 276 #ifdef RULES_DEBUG
 277                         if (r->var >= 0) {
 278                                 printk(" -> ");
 279                                 if (hw_is_mask(r->var))
 280                                         printk("%x", *m->bits);
 281                                 else {
 282                                         if (i->empty)
 283                                                 printk("empty");
 284                                         else
 285                                                 printk("%c%u %u%c",
 286                                                        i->openmin ? '(' : '[', i->min,
 287                                                        i->max, i->openmax ? ')' : ']');
 288                                 }
 289                         }
 290                         printk("\n");
 291 #endif
 292                         rstamps[k] = stamp;
 293                         if (changed && r->var >= 0) {
 294                                 params->cmask |= (1 << r->var);
 295                                 vstamps[r->var] = stamp;
 296                                 again = 1;
 297                         }
 298                         if (changed < 0)
 299                                 return changed;
 300                         stamp++;
 301                 }
 302         } while (again);
 303         if (!params->msbits) {
 304                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
 305                 if (snd_interval_single(i))
 306                         params->msbits = snd_interval_value(i);
 307         }
 308
 309         if (!params->rate_den) {
 310                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 311                 if (snd_interval_single(i)) {
 312                         params->rate_num = snd_interval_value(i);
 313                         params->rate_den = 1;
 314                 }
 315         }
 316
 317         hw = &substream->runtime->hw;
 318         if (!params->info)
 319                 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
 320         if (!params->fifo_size) {
 321                 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 322                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 323                 if (snd_mask_min(m) == snd_mask_max(m) &&
 324                     snd_interval_min(i) == snd_interval_max(i)) {
 325                         changed = substream->ops->ioctl(substream,
 326                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
 327                         if (changed < 0)
 328                                 return changed;
 329                 }
 330         }
 331         params->rmask = 0;
 332         return 0;
 333 }
 334
 335 EXPORT_SYMBOL(snd_pcm_hw_refine);
 336
 337 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 338                                   struct snd_pcm_hw_params __user * _params)
 339 {
 340         struct snd_pcm_hw_params *params;
 341         int err;
 342
 343         params = memdup_user(_params, sizeof(*params));
 344         if (IS_ERR(params))
 345                 return PTR_ERR(params);
 346
 347         err = snd_pcm_hw_refine(substream, params);
 348         if (copy_to_user(_params, params, sizeof(*params))) {
 349                 if (!err)
 350                         err = -EFAULT;
 351         }
 352
 353         kfree(params);
 354         return err;
 355 }
 356
 357 static int period_to_usecs(struct snd_pcm_runtime *runtime)
 358 {
 359         int usecs;
 360
 361         if (! runtime->rate)
 362                 return -1; /* invalid */
 363
 364         /* take 75% of period time as the deadline */
 365         usecs = (750000 / runtime->rate) * runtime->period_size;
 366         usecs += ((750000 % runtime->rate) * runtime->period_size) /
 367                 runtime->rate;
 368
 369         return usecs;
 370 }
 371
 372 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 373                              struct snd_pcm_hw_params *params)
 374 {
 375         struct snd_pcm_runtime *runtime;
 376         int err, usecs;
 377         unsigned int bits;
 378         snd_pcm_uframes_t frames;
 379
 380         if (PCM_RUNTIME_CHECK(substream))
 381                 return -ENXIO;
 382         runtime = substream->runtime;
 383         snd_pcm_stream_lock_irq(substream);
 384         switch (runtime->status->state) {
 385         case SNDRV_PCM_STATE_OPEN:
 386         case SNDRV_PCM_STATE_SETUP:
 387         case SNDRV_PCM_STATE_PREPARED:
 388                 break;
 389         default:
 390                 snd_pcm_stream_unlock_irq(substream);
 391                 return -EBADFD;
 392         }
 393         snd_pcm_stream_unlock_irq(substream);
 394 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 395         if (!substream->oss.oss)
 396 #endif
 397                 if (atomic_read(&substream->mmap_count))
 398                         return -EBADFD;
 399
 400         params->rmask = ~0U;
 401         err = snd_pcm_hw_refine(substream, params);
 402         if (err < 0)
 403                 goto _error;
 404
 405         err = snd_pcm_hw_params_choose(substream, params);
 406         if (err < 0)
 407                 goto _error;
 408
 409         if (substream->ops->hw_params != NULL) {
 410                 err = substream->ops->hw_params(substream, params);
 411                 if (err < 0)
 412                         goto _error;
 413         }
 414
 415         runtime->access = params_access(params);
 416         runtime->format = params_format(params);
 417         runtime->subformat = params_subformat(params);
 418         runtime->channels = params_channels(params);
 419         runtime->rate = params_rate(params);
 420         runtime->period_size = params_period_size(params);
 421         runtime->periods = params_periods(params);
 422         runtime->buffer_size = params_buffer_size(params);
 423         runtime->info = params->info;
 424         runtime->rate_num = params->rate_num;
 425         runtime->rate_den = params->rate_den;
 426         runtime->no_period_wakeup =
 427                         (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
 428                         (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
 429
 430         bits = snd_pcm_format_physical_width(runtime->format);
 431         runtime->sample_bits = bits;
 432         bits *= runtime->channels;
 433         runtime->frame_bits = bits;
 434         frames = 1;
 435         while (bits % 8 != 0) {
 436                 bits *= 2;
 437                 frames *= 2;
 438         }
 439         runtime->byte_align = bits / 8;
 440         runtime->min_align = frames;
 441
 442         /* Default sw params */
 443         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 444         runtime->period_step = 1;
 445         runtime->control->avail_min = runtime->period_size;
 446         runtime->start_threshold = 1;
 447         runtime->stop_threshold = runtime->buffer_size;
 448         runtime->silence_threshold = 0;
 449         runtime->silence_size = 0;
 450         runtime->boundary = runtime->buffer_size;
 451         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 452                 runtime->boundary *= 2;
 453
 454         snd_pcm_timer_resolution_change(substream);
 455         runtime->status->state = SNDRV_PCM_STATE_SETUP;
 456
 457         if (pm_qos_request_active(&substream->latency_pm_qos_req))
 458                 pm_qos_remove_request(&substream->latency_pm_qos_req);
 459         if ((usecs = period_to_usecs(runtime)) >= 0)
 460                 pm_qos_add_request(&substream->latency_pm_qos_req,
 461                                    PM_QOS_CPU_DMA_LATENCY, usecs);
 462         return 0;
 463  _error:
 464         /* hardware might be unusable from this time,
 465            so we force application to retry to set
 466            the correct hardware parameter settings */
 467         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 468         if (substream->ops->hw_free != NULL)
 469                 substream->ops->hw_free(substream);
 470         return err;
 471 }
 472
 473 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 474                                   struct snd_pcm_hw_params __user * _params)
 475 {
 476         struct snd_pcm_hw_params *params;
 477         int err;
 478
 479         params = memdup_user(_params, sizeof(*params));
 480         if (IS_ERR(params))
 481                 return PTR_ERR(params);
 482
 483         err = snd_pcm_hw_params(substream, params);
 484         if (copy_to_user(_params, params, sizeof(*params))) {
 485                 if (!err)
 486                         err = -EFAULT;
 487         }
 488
 489         kfree(params);
 490         return err;
 491 }
 492
 493 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 494 {
 495         struct snd_pcm_runtime *runtime;
 496         int result = 0;
 497
 498         if (PCM_RUNTIME_CHECK(substream))
 499                 return -ENXIO;
 500         runtime = substream->runtime;
 501         snd_pcm_stream_lock_irq(substream);
 502         switch (runtime->status->state) {
 503         case SNDRV_PCM_STATE_SETUP:
 504         case SNDRV_PCM_STATE_PREPARED:
 505                 break;
 506         default:
 507                 snd_pcm_stream_unlock_irq(substream);
 508                 return -EBADFD;
 509         }
 510         snd_pcm_stream_unlock_irq(substream);
 511         if (atomic_read(&substream->mmap_count))
 512                 return -EBADFD;
 513         if (substream->ops->hw_free)
 514                 result = substream->ops->hw_free(substream);
 515         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 516         pm_qos_remove_request(&substream->latency_pm_qos_req);
 517         return result;
 518 }
 519
 520 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 521                              struct snd_pcm_sw_params *params)
 522 {
 523         struct snd_pcm_runtime *runtime;
 524         int err;
 525
 526         if (PCM_RUNTIME_CHECK(substream))
 527                 return -ENXIO;
 528         runtime = substream->runtime;
 529         snd_pcm_stream_lock_irq(substream);
 530         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 531                 snd_pcm_stream_unlock_irq(substream);
 532                 return -EBADFD;
 533         }
 534         snd_pcm_stream_unlock_irq(substream);
 535
 536         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 537                 return -EINVAL;
 538         if (params->avail_min == 0)
 539                 return -EINVAL;
 540         if (params->silence_size >= runtime->boundary) {
 541                 if (params->silence_threshold != 0)
 542                         return -EINVAL;
 543         } else {
 544                 if (params->silence_size > params->silence_threshold)
 545                         return -EINVAL;
 546                 if (params->silence_threshold > runtime->buffer_size)
 547                         return -EINVAL;
 548         }
 549         err = 0;
 550         snd_pcm_stream_lock_irq(substream);
 551         runtime->tstamp_mode = params->tstamp_mode;
 552         runtime->period_step = params->period_step;
 553         runtime->control->avail_min = params->avail_min;
 554         runtime->start_threshold = params->start_threshold;
 555         runtime->stop_threshold = params->stop_threshold;
 556         runtime->silence_threshold = params->silence_threshold;
 557         runtime->silence_size = params->silence_size;
 558         params->boundary = runtime->boundary;
 559         if (snd_pcm_running(substream)) {
 560                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 561                     runtime->silence_size > 0)
 562                         snd_pcm_playback_silence(substream, ULONG_MAX);
 563                 err = snd_pcm_update_state(substream, runtime);
 564         }
 565         snd_pcm_stream_unlock_irq(substream);
 566         return err;
 567 }
 568
 569 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 570                                   struct snd_pcm_sw_params __user * _params)
 571 {
 572         struct snd_pcm_sw_params params;
 573         int err;
 574         if (copy_from_user(&params, _params, sizeof(params)))
 575                 return -EFAULT;
 576         err = snd_pcm_sw_params(substream, &params);
 577         if (copy_to_user(_params, &params, sizeof(params)))
 578                 return -EFAULT;
 579         return err;
 580 }
 581
 582 int snd_pcm_status(struct snd_pcm_substream *substream,
 583                    struct snd_pcm_status *status)
 584 {
 585         struct snd_pcm_runtime *runtime = substream->runtime;
 586
 587         snd_pcm_stream_lock_irq(substream);
 588         status->state = runtime->status->state;
 589         status->suspended_state = runtime->status->suspended_state;
 590         if (status->state == SNDRV_PCM_STATE_OPEN)
 591                 goto _end;
 592         status->trigger_tstamp = runtime->trigger_tstamp;
 593         if (snd_pcm_running(substream)) {
 594                 snd_pcm_update_hw_ptr(substream);
 595                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
 596                         status->tstamp = runtime->status->tstamp;
 597                         goto _tstamp_end;
 598                 }
 599         }
 600         snd_pcm_gettime(runtime, &status->tstamp);
 601  _tstamp_end:
 602         status->appl_ptr = runtime->control->appl_ptr;
 603         status->hw_ptr = runtime->status->hw_ptr;
 604         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 605                 status->avail = snd_pcm_playback_avail(runtime);
 606                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 607                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 608                         status->delay = runtime->buffer_size - status->avail;
 609                         status->delay += runtime->delay;
 610                 } else
 611                         status->delay = 0;
 612         } else {
 613                 status->avail = snd_pcm_capture_avail(runtime);
 614                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 615                         status->delay = status->avail + runtime->delay;
 616                 else
 617                         status->delay = 0;
 618         }
 619         status->avail_max = runtime->avail_max;
 620         status->overrange = runtime->overrange;
 621         runtime->avail_max = 0;
 622         runtime->overrange = 0;
 623  _end:
 624         snd_pcm_stream_unlock_irq(substream);
 625         return 0;
 626 }
 627
 628 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 629                                struct snd_pcm_status __user * _status)
 630 {
 631         struct snd_pcm_status status;
 632         int res;
 633
 634         memset(&status, 0, sizeof(status));
 635         res = snd_pcm_status(substream, &status);
 636         if (res < 0)
 637                 return res;
 638         if (copy_to_user(_status, &status, sizeof(status)))
 639                 return -EFAULT;
 640         return 0;
 641 }
 642
 643 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 644                                 struct snd_pcm_channel_info * info)
 645 {
 646         struct snd_pcm_runtime *runtime;
 647         unsigned int channel;
 648
 649         channel = info->channel;
 650         runtime = substream->runtime;
 651         snd_pcm_stream_lock_irq(substream);
 652         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 653                 snd_pcm_stream_unlock_irq(substream);
 654                 return -EBADFD;
 655         }
 656         snd_pcm_stream_unlock_irq(substream);
 657         if (channel >= runtime->channels)
 658                 return -EINVAL;
 659         memset(info, 0, sizeof(*info));
 660         info->channel = channel;
 661         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 662 }
 663
 664 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 665                                      struct snd_pcm_channel_info __user * _info)
 666 {
 667         struct snd_pcm_channel_info info;
 668         int res;
 669
 670         if (copy_from_user(&info, _info, sizeof(info)))
 671                 return -EFAULT;
 672         res = snd_pcm_channel_info(substream, &info);
 673         if (res < 0)
 674                 return res;
 675         if (copy_to_user(_info, &info, sizeof(info)))
 676                 return -EFAULT;
 677         return 0;
 678 }
 679
 680 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 681 {
 682         struct snd_pcm_runtime *runtime = substream->runtime;
 683         if (runtime->trigger_master == NULL)
 684                 return;
 685         if (runtime->trigger_master == substream) {
 686                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
 687         } else {
 688                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 689                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 690         }
 691         runtime->trigger_master = NULL;
 692 }
 693
 694 struct action_ops {
 695         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 696         int (*do_action)(struct snd_pcm_substream *substream, int state);
 697         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 698         void (*post_action)(struct snd_pcm_substream *substream, int state);
 699 };
 700
 701 /*
 702  *  this functions is core for handling of linked stream
 703  *  Note: the stream state might be changed also on failure
 704  *  Note2: call with calling stream lock + link lock
 705  */
 706 static int snd_pcm_action_group(struct action_ops *ops,
 707                                 struct snd_pcm_substream *substream,
 708                                 int state, int do_lock)
 709 {
 710         struct snd_pcm_substream *s = NULL;
 711         struct snd_pcm_substream *s1;
 712         int res = 0;
 713
 714         snd_pcm_group_for_each_entry(s, substream) {
 715                 if (do_lock && s != substream)
 716                         spin_lock_nested(&s->self_group.lock,
 717                                          SINGLE_DEPTH_NESTING);
 718                 res = ops->pre_action(s, state);
 719                 if (res < 0)
 720                         goto _unlock;
 721         }
 722         snd_pcm_group_for_each_entry(s, substream) {
 723                 res = ops->do_action(s, state);
 724                 if (res < 0) {
 725                         if (ops->undo_action) {
 726                                 snd_pcm_group_for_each_entry(s1, substream) {
 727                                         if (s1 == s) /* failed stream */
 728                                                 break;
 729                                         ops->undo_action(s1, state);
 730                                 }
 731                         }
 732                         s = NULL; /* unlock all */
 733                         goto _unlock;
 734                 }
 735         }
 736         snd_pcm_group_for_each_entry(s, substream) {
 737                 ops->post_action(s, state);
 738         }
 739  _unlock:
 740         if (do_lock) {
 741                 /* unlock streams */
 742                 snd_pcm_group_for_each_entry(s1, substream) {
 743                         if (s1 != substream)
 744                                 spin_unlock(&s1->self_group.lock);
 745                         if (s1 == s)    /* end */
 746                                 break;
 747                 }
 748         }
 749         return res;
 750 }
 751
 752 /*
 753  *  Note: call with stream lock
 754  */
 755 static int snd_pcm_action_single(struct action_ops *ops,
 756                                  struct snd_pcm_substream *substream,
 757                                  int state)
 758 {
 759         int res;
 760
 761         res = ops->pre_action(substream, state);
 762         if (res < 0)
 763                 return res;
 764         res = ops->do_action(substream, state);
 765         if (res == 0)
 766                 ops->post_action(substream, state);
 767         else if (ops->undo_action)
 768                 ops->undo_action(substream, state);
 769         return res;
 770 }
 771
 772 /*
 773  *  Note: call with stream lock
 774  */
 775 static int snd_pcm_action(struct action_ops *ops,
 776                           struct snd_pcm_substream *substream,
 777                           int state)
 778 {
 779         int res;
 780
 781         if (snd_pcm_stream_linked(substream)) {
 782                 if (!spin_trylock(&substream->group->lock)) {
 783                         spin_unlock(&substream->self_group.lock);
 784                         spin_lock(&substream->group->lock);
 785                         spin_lock(&substream->self_group.lock);
 786                 }
 787                 res = snd_pcm_action_group(ops, substream, state, 1);
 788                 spin_unlock(&substream->group->lock);
 789         } else {
 790                 res = snd_pcm_action_single(ops, substream, state);
 791         }
 792         return res;
 793 }
 794
 795 /*
 796  *  Note: don't use any locks before
 797  */
 798 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 799                                    struct snd_pcm_substream *substream,
 800                                    int state)
 801 {
 802         int res;
 803
 804         read_lock_irq(&snd_pcm_link_rwlock);
 805         if (snd_pcm_stream_linked(substream)) {
 806                 spin_lock(&substream->group->lock);
 807                 spin_lock(&substream->self_group.lock);
 808                 res = snd_pcm_action_group(ops, substream, state, 1);
 809                 spin_unlock(&substream->self_group.lock);
 810                 spin_unlock(&substream->group->lock);
 811         } else {
 812                 spin_lock(&substream->self_group.lock);
 813                 res = snd_pcm_action_single(ops, substream, state);
 814                 spin_unlock(&substream->self_group.lock);
 815         }
 816         read_unlock_irq(&snd_pcm_link_rwlock);
 817         return res;
 818 }
 819
 820 /*
 821  */
 822 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 823                                     struct snd_pcm_substream *substream,
 824                                     int state)
 825 {
 826         int res;
 827
 828         down_read(&snd_pcm_link_rwsem);
 829         if (snd_pcm_stream_linked(substream))
 830                 res = snd_pcm_action_group(ops, substream, state, 0);
 831         else
 832                 res = snd_pcm_action_single(ops, substream, state);
 833         up_read(&snd_pcm_link_rwsem);
 834         return res;
 835 }
 836
 837 /*
 838  * start callbacks
 839  */
 840 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 841 {
 842         struct snd_pcm_runtime *runtime = substream->runtime;
 843         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 844                 return -EBADFD;
 845         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 846             !snd_pcm_playback_data(substream))
 847                 return -EPIPE;
 848         runtime->trigger_master = substream;
 849         return 0;
 850 }
 851
 852 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 853 {
 854         if (substream->runtime->trigger_master != substream)
 855                 return 0;
 856         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
 857 }
 858
 859 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
 860 {
 861         if (substream->runtime->trigger_master == substream)
 862                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 863 }
 864
 865 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
 866 {
 867         struct snd_pcm_runtime *runtime = substream->runtime;
 868         snd_pcm_trigger_tstamp(substream);
 869         runtime->hw_ptr_jiffies = jiffies;
 870         runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
 871                                                             runtime->rate;
 872         runtime->status->state = state;
 873         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 874             runtime->silence_size > 0)
 875                 snd_pcm_playback_silence(substream, ULONG_MAX);
 876         if (substream->timer)
 877                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
 878                                  &runtime->trigger_tstamp);
 879 }
 880
 881 static struct action_ops snd_pcm_action_start = {
 882         .pre_action = snd_pcm_pre_start,
 883         .do_action = snd_pcm_do_start,
 884         .undo_action = snd_pcm_undo_start,
 885         .post_action = snd_pcm_post_start
 886 };
 887
 888 /**
 889  * snd_pcm_start - start all linked streams
 890  * @substream: the PCM substream instance
 891  */
 892 int snd_pcm_start(struct snd_pcm_substream *substream)
 893 {
 894         return snd_pcm_action(&snd_pcm_action_start, substream,
 895                               SNDRV_PCM_STATE_RUNNING);
 896 }
 897
 898 /*
 899  * stop callbacks
 900  */
 901 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
 902 {
 903         struct snd_pcm_runtime *runtime = substream->runtime;
 904         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 905                 return -EBADFD;
 906         runtime->trigger_master = substream;
 907         return 0;
 908 }
 909
 910 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
 911 {
 912         if (substream->runtime->trigger_master == substream &&
 913             snd_pcm_running(substream))
 914                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 915         return 0; /* unconditonally stop all substreams */
 916 }
 917
 918 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
 919 {
 920         struct snd_pcm_runtime *runtime = substream->runtime;
 921         if (runtime->status->state != state) {
 922                 snd_pcm_trigger_tstamp(substream);
 923                 if (substream->timer)
 924                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
 925                                          &runtime->trigger_tstamp);
 926                 runtime->status->state = state;
 927         }
 928         wake_up(&runtime->sleep);
 929         wake_up(&runtime->tsleep);
 930 }
 931
 932 static struct action_ops snd_pcm_action_stop = {
 933         .pre_action = snd_pcm_pre_stop,
 934         .do_action = snd_pcm_do_stop,
 935         .post_action = snd_pcm_post_stop
 936 };
 937
 938 /**
 939  * snd_pcm_stop - try to stop all running streams in the substream group
 940  * @substream: the PCM substream instance
 941  * @state: PCM state after stopping the stream
 942  *
 943  * The state of each stream is then changed to the given state unconditionally.
 944  */
 945 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
 946 {
 947         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
 948 }
 949
 950 EXPORT_SYMBOL(snd_pcm_stop);
 951
 952 /**
 953  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
 954  * @substream: the PCM substream
 955  *
 956  * After stopping, the state is changed to SETUP.
 957  * Unlike snd_pcm_stop(), this affects only the given stream.
 958  */
 959 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
 960 {
 961         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
 962                                      SNDRV_PCM_STATE_SETUP);
 963 }
 964
 965 /*
 966  * pause callbacks
 967  */
 968 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
 969 {
 970         struct snd_pcm_runtime *runtime = substream->runtime;
 971         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
 972                 return -ENOSYS;
 973         if (push) {
 974                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
 975                         return -EBADFD;
 976         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
 977                 return -EBADFD;
 978         runtime->trigger_master = substream;
 979         return 0;
 980 }
 981
 982 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
 983 {
 984         if (substream->runtime->trigger_master != substream)
 985                 return 0;
 986         /* some drivers might use hw_ptr to recover from the pause -
 987            update the hw_ptr now */
 988         if (push)
 989                 snd_pcm_update_hw_ptr(substream);
 990         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
 991          * a delta between the current jiffies, this gives a large enough
 992          * delta, effectively to skip the check once.
 993          */
 994         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
 995         return substream->ops->trigger(substream,
 996                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
 997                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
 998 }
 999
1000 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1001 {
1002         if (substream->runtime->trigger_master == substream)
1003                 substream->ops->trigger(substream,
1004                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1005                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1006 }
1007
1008 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1009 {
1010         struct snd_pcm_runtime *runtime = substream->runtime;
1011         snd_pcm_trigger_tstamp(substream);
1012         if (push) {
1013                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1014                 if (substream->timer)
1015                         snd_timer_notify(substream->timer,
1016                                          SNDRV_TIMER_EVENT_MPAUSE,
1017                                          &runtime->trigger_tstamp);
1018                 wake_up(&runtime->sleep);
1019                 wake_up(&runtime->tsleep);
1020         } else {
1021                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1022                 if (substream->timer)
1023                         snd_timer_notify(substream->timer,
1024                                          SNDRV_TIMER_EVENT_MCONTINUE,
1025                                          &runtime->trigger_tstamp);
1026         }
1027 }
1028
1029 static struct action_ops snd_pcm_action_pause = {
1030         .pre_action = snd_pcm_pre_pause,
1031         .do_action = snd_pcm_do_pause,
1032         .undo_action = snd_pcm_undo_pause,
1033         .post_action = snd_pcm_post_pause
1034 };
1035
1036 /*
1037  * Push/release the pause for all linked streams.
1038  */
1039 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1040 {
1041         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1042 }
1043
1044 #ifdef CONFIG_PM
1045 /* suspend */
1046
1047 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1048 {
1049         struct snd_pcm_runtime *runtime = substream->runtime;
1050         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1051                 return -EBUSY;
1052         runtime->trigger_master = substream;
1053         return 0;
1054 }
1055
1056 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1057 {
1058         struct snd_pcm_runtime *runtime = substream->runtime;
1059         if (runtime->trigger_master != substream)
1060                 return 0;
1061         if (! snd_pcm_running(substream))
1062                 return 0;
1063         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1064         return 0; /* suspend unconditionally */
1065 }
1066
1067 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1068 {
1069         struct snd_pcm_runtime *runtime = substream->runtime;
1070         snd_pcm_trigger_tstamp(substream);
1071         if (substream->timer)
1072                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1073                                  &runtime->trigger_tstamp);
1074         runtime->status->suspended_state = runtime->status->state;
1075         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1076         wake_up(&runtime->sleep);
1077         wake_up(&runtime->tsleep);
1078 }
1079
1080 static struct action_ops snd_pcm_action_suspend = {
1081         .pre_action = snd_pcm_pre_suspend,
1082         .do_action = snd_pcm_do_suspend,
1083         .post_action = snd_pcm_post_suspend
1084 };
1085
1086 /**
1087  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1088  * @substream: the PCM substream
1089  *
1090  * After this call, all streams are changed to SUSPENDED state.
1091  */
1092 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1093 {
1094         int err;
1095         unsigned long flags;
1096
1097         if (! substream)
1098                 return 0;
1099
1100         snd_pcm_stream_lock_irqsave(substream, flags);
1101         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1102         snd_pcm_stream_unlock_irqrestore(substream, flags);
1103         return err;
1104 }
1105
1106 EXPORT_SYMBOL(snd_pcm_suspend);
1107
1108 /**
1109  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1110  * @pcm: the PCM instance
1111  *
1112  * After this call, all streams are changed to SUSPENDED state.
1113  */
1114 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1115 {
1116         struct snd_pcm_substream *substream;
1117         int stream, err = 0;
1118
1119         if (! pcm)
1120                 return 0;
1121
1122         for (stream = 0; stream < 2; stream++) {
1123                 for (substream = pcm->streams[stream].substream;
1124                      substream; substream = substream->next) {
1125                         /* FIXME: the open/close code should lock this as well */
1126                         if (substream->runtime == NULL)
1127                                 continue;
1128                         err = snd_pcm_suspend(substream);
1129                         if (err < 0 && err != -EBUSY)
1130                                 return err;
1131                 }
1132         }
1133         return 0;
1134 }
1135
1136 EXPORT_SYMBOL(snd_pcm_suspend_all);
1137
1138 /* resume */
1139
1140 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1141 {
1142         struct snd_pcm_runtime *runtime = substream->runtime;
1143         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1144                 return -ENOSYS;
1145         runtime->trigger_master = substream;
1146         return 0;
1147 }
1148
1149 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1150 {
1151         struct snd_pcm_runtime *runtime = substream->runtime;
1152         if (runtime->trigger_master != substream)
1153                 return 0;
1154         /* DMA not running previously? */
1155         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1156             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1157              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1158                 return 0;
1159         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1160 }
1161
1162 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1163 {
1164         if (substream->runtime->trigger_master == substream &&
1165             snd_pcm_running(substream))
1166                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1167 }
1168
1169 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1170 {
1171         struct snd_pcm_runtime *runtime = substream->runtime;
1172         snd_pcm_trigger_tstamp(substream);
1173         if (substream->timer)
1174                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1175                                  &runtime->trigger_tstamp);
1176         runtime->status->state = runtime->status->suspended_state;
1177 }
1178
1179 static struct action_ops snd_pcm_action_resume = {
1180         .pre_action = snd_pcm_pre_resume,
1181         .do_action = snd_pcm_do_resume,
1182         .undo_action = snd_pcm_undo_resume,
1183         .post_action = snd_pcm_post_resume
1184 };
1185
1186 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1187 {
1188         struct snd_card *card = substream->pcm->card;
1189         int res;
1190
1191         snd_power_lock(card);
1192         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1193                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1194         snd_power_unlock(card);
1195         return res;
1196 }
1197
1198 #else
1199
1200 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1201 {
1202         return -ENOSYS;
1203 }
1204
1205 #endif /* CONFIG_PM */
1206
1207 /*
1208  * xrun ioctl
1209  *
1210  * Change the RUNNING stream(s) to XRUN state.
1211  */
1212 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1213 {
1214         struct snd_card *card = substream->pcm->card;
1215         struct snd_pcm_runtime *runtime = substream->runtime;
1216         int result;
1217
1218         snd_power_lock(card);
1219         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1220                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1221                 if (result < 0)
1222                         goto _unlock;
1223         }
1224
1225         snd_pcm_stream_lock_irq(substream);
1226         switch (runtime->status->state) {
1227         case SNDRV_PCM_STATE_XRUN:
1228                 result = 0;     /* already there */
1229                 break;
1230         case SNDRV_PCM_STATE_RUNNING:
1231                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1232                 break;
1233         default:
1234                 result = -EBADFD;
1235         }
1236         snd_pcm_stream_unlock_irq(substream);
1237  _unlock:
1238         snd_power_unlock(card);
1239         return result;
1240 }
1241
1242 /*
1243  * reset ioctl
1244  */
1245 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1246 {
1247         struct snd_pcm_runtime *runtime = substream->runtime;
1248         switch (runtime->status->state) {
1249         case SNDRV_PCM_STATE_RUNNING:
1250         case SNDRV_PCM_STATE_PREPARED:
1251         case SNDRV_PCM_STATE_PAUSED:
1252         case SNDRV_PCM_STATE_SUSPENDED:
1253                 return 0;
1254         default:
1255                 return -EBADFD;
1256         }
1257 }
1258
1259 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1260 {
1261         struct snd_pcm_runtime *runtime = substream->runtime;
1262         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1263         if (err < 0)
1264                 return err;
1265         runtime->hw_ptr_base = 0;
1266         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1267                 runtime->status->hw_ptr % runtime->period_size;
1268         runtime->silence_start = runtime->status->hw_ptr;
1269         runtime->silence_filled = 0;
1270         return 0;
1271 }
1272
1273 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1274 {
1275         struct snd_pcm_runtime *runtime = substream->runtime;
1276         runtime->control->appl_ptr = runtime->status->hw_ptr;
1277         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1278             runtime->silence_size > 0)
1279                 snd_pcm_playback_silence(substream, ULONG_MAX);
1280 }
1281
1282 static struct action_ops snd_pcm_action_reset = {
1283         .pre_action = snd_pcm_pre_reset,
1284         .do_action = snd_pcm_do_reset,
1285         .post_action = snd_pcm_post_reset
1286 };
1287
1288 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1289 {
1290         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1291 }
1292
1293 /*
1294  * prepare ioctl
1295  */
1296 /* we use the second argument for updating f_flags */
1297 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1298                                int f_flags)
1299 {
1300         struct snd_pcm_runtime *runtime = substream->runtime;
1301         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1302             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1303                 return -EBADFD;
1304         if (snd_pcm_running(substream))
1305                 return -EBUSY;
1306         substream->f_flags = f_flags;
1307         return 0;
1308 }
1309
1310 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1311 {
1312         int err;
1313         err = substream->ops->prepare(substream);
1314         if (err < 0)
1315                 return err;
1316         return snd_pcm_do_reset(substream, 0);
1317 }
1318
1319 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1320 {
1321         struct snd_pcm_runtime *runtime = substream->runtime;
1322         runtime->control->appl_ptr = runtime->status->hw_ptr;
1323         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1324 }
1325
1326 static struct action_ops snd_pcm_action_prepare = {
1327         .pre_action = snd_pcm_pre_prepare,
1328         .do_action = snd_pcm_do_prepare,
1329         .post_action = snd_pcm_post_prepare
1330 };
1331
1332 /**
1333  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1334  * @substream: the PCM substream instance
1335  * @file: file to refer f_flags
1336  */
1337 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1338                            struct file *file)
1339 {
1340         int res;
1341         struct snd_card *card = substream->pcm->card;
1342         int f_flags;
1343
1344         if (file)
1345                 f_flags = file->f_flags;
1346         else
1347                 f_flags = substream->f_flags;
1348
1349         snd_power_lock(card);
1350         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1351                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1352                                                substream, f_flags);
1353         snd_power_unlock(card);
1354         return res;
1355 }
1356
1357 /*
1358  * drain ioctl
1359  */
1360
1361 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1362 {
1363         substream->runtime->trigger_master = substream;
1364         return 0;
1365 }
1366
1367 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1368 {
1369         struct snd_pcm_runtime *runtime = substream->runtime;
1370         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1371                 switch (runtime->status->state) {
1372                 case SNDRV_PCM_STATE_PREPARED:
1373                         /* start playback stream if possible */
1374                         if (! snd_pcm_playback_empty(substream)) {
1375                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1376                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1377                         }
1378                         break;
1379                 case SNDRV_PCM_STATE_RUNNING:
1380                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1381                         break;
1382                 default:
1383                         break;
1384                 }
1385         } else {
1386                 /* stop running stream */
1387                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1388                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1389                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1390                         snd_pcm_do_stop(substream, new_state);
1391                         snd_pcm_post_stop(substream, new_state);
1392                 }
1393         }
1394         return 0;
1395 }
1396
1397 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1398 {
1399 }
1400
1401 static struct action_ops snd_pcm_action_drain_init = {
1402         .pre_action = snd_pcm_pre_drain_init,
1403         .do_action = snd_pcm_do_drain_init,
1404         .post_action = snd_pcm_post_drain_init
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                          struct file *file)
1418 {
1419         struct snd_card *card;
1420         struct snd_pcm_runtime *runtime;
1421         struct snd_pcm_substream *s;
1422         wait_queue_t wait;
1423         int result = 0;
1424         int nonblock = 0;
1425
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         if (file) {
1442                 if (file->f_flags & O_NONBLOCK)
1443                         nonblock = 1;
1444         } else if (substream->f_flags & O_NONBLOCK)
1445                 nonblock = 1;
1446
1447         down_read(&snd_pcm_link_rwsem);
1448         snd_pcm_stream_lock_irq(substream);
1449         /* resume pause */
1450         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1451                 snd_pcm_pause(substream, 0);
1452
1453         /* pre-start/stop - all running streams are changed to DRAINING state */
1454         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1455         if (result < 0)
1456                 goto unlock;
1457         /* in non-blocking, we don't wait in ioctl but let caller poll */
1458         if (nonblock) {
1459                 result = -EAGAIN;
1460                 goto unlock;
1461         }
1462
1463         for (;;) {
1464                 long tout;
1465                 struct snd_pcm_runtime *to_check;
1466                 if (signal_pending(current)) {
1467                         result = -ERESTARTSYS;
1468                         break;
1469                 }
1470                 /* find a substream to drain */
1471                 to_check = NULL;
1472                 snd_pcm_group_for_each_entry(s, substream) {
1473                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1474                                 continue;
1475                         runtime = s->runtime;
1476                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1477                                 to_check = runtime;
1478                                 break;
1479                         }
1480                 }
1481                 if (!to_check)
1482                         break; /* all drained */
1483                 init_waitqueue_entry(&wait, current);
1484                 add_wait_queue(&to_check->sleep, &wait);
1485                 snd_pcm_stream_unlock_irq(substream);
1486                 up_read(&snd_pcm_link_rwsem);
1487                 snd_power_unlock(card);
1488                 if (runtime->no_period_wakeup)
1489                         tout = MAX_SCHEDULE_TIMEOUT;
1490                 else {
1491                         tout = 10;
1492                         if (runtime->rate) {
1493                                 long t = runtime->period_size * 2 / runtime->rate;
1494                                 tout = max(t, tout);
1495                         }
1496                         tout = msecs_to_jiffies(tout * 1000);
1497                 }
1498                 tout = schedule_timeout_interruptible(tout);
1499                 snd_power_lock(card);
1500                 down_read(&snd_pcm_link_rwsem);
1501                 snd_pcm_stream_lock_irq(substream);
1502                 remove_wait_queue(&to_check->sleep, &wait);
1503                 if (tout == 0) {
1504                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1505                                 result = -ESTRPIPE;
1506                         else {
1507                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1508                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1509                                 result = -EIO;
1510                         }
1511                         break;
1512                 }
1513         }
1514
1515  unlock:
1516         snd_pcm_stream_unlock_irq(substream);
1517         up_read(&snd_pcm_link_rwsem);
1518         snd_power_unlock(card);
1519
1520         return result;
1521 }
1522
1523 /*
1524  * drop ioctl
1525  *
1526  * Immediately put all linked substreams into SETUP state.
1527  */
1528 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1529 {
1530         struct snd_pcm_runtime *runtime;
1531         int result = 0;
1532
1533         if (PCM_RUNTIME_CHECK(substream))
1534                 return -ENXIO;
1535         runtime = substream->runtime;
1536
1537         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1538             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1539             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1540                 return -EBADFD;
1541
1542         snd_pcm_stream_lock_irq(substream);
1543         /* resume pause */
1544         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1545                 snd_pcm_pause(substream, 0);
1546
1547         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1548         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1549         snd_pcm_stream_unlock_irq(substream);
1550
1551         return result;
1552 }
1553
1554
1555 /* WARNING: Don't forget to fput back the file */
1556 static struct file *snd_pcm_file_fd(int fd)
1557 {
1558         struct file *file;
1559         struct inode *inode;
1560         unsigned int minor;
1561
1562         file = fget(fd);
1563         if (!file)
1564                 return NULL;
1565         inode = file->f_path.dentry->d_inode;
1566         if (!S_ISCHR(inode->i_mode) ||
1567             imajor(inode) != snd_major) {
1568                 fput(file);
1569                 return NULL;
1570         }
1571         minor = iminor(inode);
1572         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1573             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1574                 fput(file);
1575                 return NULL;
1576         }
1577         return file;
1578 }
1579
1580 /*
1581  * PCM link handling
1582  */
1583 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1584 {
1585         int res = 0;
1586         struct file *file;
1587         struct snd_pcm_file *pcm_file;
1588         struct snd_pcm_substream *substream1;
1589         struct snd_pcm_group *group;
1590
1591         file = snd_pcm_file_fd(fd);
1592         if (!file)
1593                 return -EBADFD;
1594         pcm_file = file->private_data;
1595         substream1 = pcm_file->substream;
1596         group = kmalloc(sizeof(*group), GFP_KERNEL);
1597         if (!group) {
1598                 res = -ENOMEM;
1599                 goto _nolock;
1600         }
1601         down_write(&snd_pcm_link_rwsem);
1602         write_lock_irq(&snd_pcm_link_rwlock);
1603         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1604             substream->runtime->status->state != substream1->runtime->status->state) {
1605                 res = -EBADFD;
1606                 goto _end;
1607         }
1608         if (snd_pcm_stream_linked(substream1)) {
1609                 res = -EALREADY;
1610                 goto _end;
1611         }
1612         if (!snd_pcm_stream_linked(substream)) {
1613                 substream->group = group;
1614                 spin_lock_init(&substream->group->lock);
1615                 INIT_LIST_HEAD(&substream->group->substreams);
1616                 list_add_tail(&substream->link_list, &substream->group->substreams);
1617                 substream->group->count = 1;
1618         }
1619         list_add_tail(&substream1->link_list, &substream->group->substreams);
1620         substream->group->count++;
1621         substream1->group = substream->group;
1622  _end:
1623         write_unlock_irq(&snd_pcm_link_rwlock);
1624         up_write(&snd_pcm_link_rwsem);
1625  _nolock:
1626         fput(file);
1627         if (res < 0)
1628                 kfree(group);
1629         return res;
1630 }
1631
1632 static void relink_to_local(struct snd_pcm_substream *substream)
1633 {
1634         substream->group = &substream->self_group;
1635         INIT_LIST_HEAD(&substream->self_group.substreams);
1636         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1637 }
1638
1639 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1640 {
1641         struct snd_pcm_substream *s;
1642         int res = 0;
1643
1644         down_write(&snd_pcm_link_rwsem);
1645         write_lock_irq(&snd_pcm_link_rwlock);
1646         if (!snd_pcm_stream_linked(substream)) {
1647                 res = -EALREADY;
1648                 goto _end;
1649         }
1650         list_del(&substream->link_list);
1651         substream->group->count--;
1652         if (substream->group->count == 1) {     /* detach the last stream, too */
1653                 snd_pcm_group_for_each_entry(s, substream) {
1654                         relink_to_local(s);
1655                         break;
1656                 }
1657                 kfree(substream->group);
1658         }
1659         relink_to_local(substream);
1660        _end:
1661         write_unlock_irq(&snd_pcm_link_rwlock);
1662         up_write(&snd_pcm_link_rwsem);
1663         return res;
1664 }
1665
1666 /*
1667  * hw configurator
1668  */
1669 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1670                                struct snd_pcm_hw_rule *rule)
1671 {
1672         struct snd_interval t;
1673         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1674                      hw_param_interval_c(params, rule->deps[1]), &t);
1675         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1676 }
1677
1678 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1679                                struct snd_pcm_hw_rule *rule)
1680 {
1681         struct snd_interval t;
1682         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1683                      hw_param_interval_c(params, rule->deps[1]), &t);
1684         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1685 }
1686
1687 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1688                                    struct snd_pcm_hw_rule *rule)
1689 {
1690         struct snd_interval t;
1691         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1692                          hw_param_interval_c(params, rule->deps[1]),
1693                          (unsigned long) rule->private, &t);
1694         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1695 }
1696
1697 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1698                                    struct snd_pcm_hw_rule *rule)
1699 {
1700         struct snd_interval t;
1701         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1702                          (unsigned long) rule->private,
1703                          hw_param_interval_c(params, rule->deps[1]), &t);
1704         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1705 }
1706
1707 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1708                                   struct snd_pcm_hw_rule *rule)
1709 {
1710         unsigned int k;
1711         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1712         struct snd_mask m;
1713         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1714         snd_mask_any(&m);
1715         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1716                 int bits;
1717                 if (! snd_mask_test(mask, k))
1718                         continue;
1719                 bits = snd_pcm_format_physical_width(k);
1720                 if (bits <= 0)
1721                         continue; /* ignore invalid formats */
1722                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1723                         snd_mask_reset(&m, k);
1724         }
1725         return snd_mask_refine(mask, &m);
1726 }
1727
1728 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1729                                        struct snd_pcm_hw_rule *rule)
1730 {
1731         struct snd_interval t;
1732         unsigned int k;
1733         t.min = UINT_MAX;
1734         t.max = 0;
1735         t.openmin = 0;
1736         t.openmax = 0;
1737         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1738                 int bits;
1739                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1740                         continue;
1741                 bits = snd_pcm_format_physical_width(k);
1742                 if (bits <= 0)
1743                         continue; /* ignore invalid formats */
1744                 if (t.min > (unsigned)bits)
1745                         t.min = bits;
1746                 if (t.max < (unsigned)bits)
1747                         t.max = bits;
1748         }
1749         t.integer = 1;
1750         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1751 }
1752
1753 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1754 #error "Change this table"
1755 #endif
1756
1757 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1758                                  48000, 64000, 88200, 96000, 176400, 192000 };
1759
1760 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1761         .count = ARRAY_SIZE(rates),
1762         .list = rates,
1763 };
1764
1765 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1766                                 struct snd_pcm_hw_rule *rule)
1767 {
1768         struct snd_pcm_hardware *hw = rule->private;
1769         return snd_interval_list(hw_param_interval(params, rule->var),
1770                                  snd_pcm_known_rates.count,
1771                                  snd_pcm_known_rates.list, hw->rates);
1772 }
1773
1774 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1775                                             struct snd_pcm_hw_rule *rule)
1776 {
1777         struct snd_interval t;
1778         struct snd_pcm_substream *substream = rule->private;
1779         t.min = 0;
1780         t.max = substream->buffer_bytes_max;
1781         t.openmin = 0;
1782         t.openmax = 0;
1783         t.integer = 1;
1784         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1785 }
1786
1787 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1788 {
1789         struct snd_pcm_runtime *runtime = substream->runtime;
1790         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1791         int k, err;
1792
1793         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1794                 snd_mask_any(constrs_mask(constrs, k));
1795         }
1796
1797         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1798                 snd_interval_any(constrs_interval(constrs, k));
1799         }
1800
1801         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1802         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1803         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1804         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1805         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1806
1807         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1808                                    snd_pcm_hw_rule_format, NULL,
1809                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1810         if (err < 0)
1811                 return err;
1812         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1813                                   snd_pcm_hw_rule_sample_bits, NULL,
1814                                   SNDRV_PCM_HW_PARAM_FORMAT,
1815                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1816         if (err < 0)
1817                 return err;
1818         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1819                                   snd_pcm_hw_rule_div, NULL,
1820                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1821         if (err < 0)
1822                 return err;
1823         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1824                                   snd_pcm_hw_rule_mul, NULL,
1825                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1826         if (err < 0)
1827                 return err;
1828         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1829                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1830                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1831         if (err < 0)
1832                 return err;
1833         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1834                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1835                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1836         if (err < 0)
1837                 return err;
1838         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1839                                   snd_pcm_hw_rule_div, NULL,
1840                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1841         if (err < 0)
1842                 return err;
1843         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1844                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1845                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1846         if (err < 0)
1847                 return err;
1848         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1849                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1850                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1851         if (err < 0)
1852                 return err;
1853         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1854                                   snd_pcm_hw_rule_div, NULL,
1855                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1856         if (err < 0)
1857                 return err;
1858         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1859                                   snd_pcm_hw_rule_div, NULL,
1860                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1861         if (err < 0)
1862                 return err;
1863         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1864                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1865                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1866         if (err < 0)
1867                 return err;
1868         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1869                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1870                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1871         if (err < 0)
1872                 return err;
1873         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1874                                   snd_pcm_hw_rule_mul, NULL,
1875                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1876         if (err < 0)
1877                 return err;
1878         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1879                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1880                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1881         if (err < 0)
1882                 return err;
1883         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1884                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1885                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1886         if (err < 0)
1887                 return err;
1888         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1889                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1890                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1891         if (err < 0)
1892                 return err;
1893         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1894                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1895                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1896         if (err < 0)
1897                 return err;
1898         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1899                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1900                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1901         if (err < 0)
1902                 return err;
1903         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1904                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1905                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1906         if (err < 0)
1907                 return err;
1908         return 0;
1909 }
1910
1911 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1912 {
1913         struct snd_pcm_runtime *runtime = substream->runtime;
1914         struct snd_pcm_hardware *hw = &runtime->hw;
1915         int err;
1916         unsigned int mask = 0;
1917
1918         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1919                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1920         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1921                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1922         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1923                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1924                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1925                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1926                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1927                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1928                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1929         }
1930         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1931         if (err < 0)
1932                 return err;
1933
1934         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1935         if (err < 0)
1936                 return err;
1937
1938         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1939         if (err < 0)
1940                 return err;
1941
1942         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1943                                            hw->channels_min, hw->channels_max);
1944         if (err < 0)
1945                 return err;
1946
1947         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1948                                            hw->rate_min, hw->rate_max);
1949         if (err < 0)
1950                 return err;
1951
1952         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1953                                            hw->period_bytes_min, hw->period_bytes_max);
1954         if (err < 0)
1955                 return err;
1956
1957         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1958                                            hw->periods_min, hw->periods_max);
1959         if (err < 0)
1960                 return err;
1961
1962         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1963                                            hw->period_bytes_min, hw->buffer_bytes_max);
1964         if (err < 0)
1965                 return err;
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                 if (err < 0)
1977                         return -EINVAL;
1978         }
1979
1980         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1981                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1982                                           snd_pcm_hw_rule_rate, hw,
1983                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1984                 if (err < 0)
1985                         return err;
1986         }
1987
1988         /* FIXME: this belong to lowlevel */
1989         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1990
1991         return 0;
1992 }
1993
1994 static void pcm_release_private(struct snd_pcm_substream *substream)
1995 {
1996         snd_pcm_unlink(substream);
1997 }
1998
1999 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2000 {
2001         substream->ref_count--;
2002         if (substream->ref_count > 0)
2003                 return;
2004
2005         snd_pcm_drop(substream);
2006         if (substream->hw_opened) {
2007                 if (substream->ops->hw_free != NULL)
2008                         substream->ops->hw_free(substream);
2009                 substream->ops->close(substream);
2010                 substream->hw_opened = 0;
2011         }
2012         if (pm_qos_request_active(&substream->latency_pm_qos_req))
2013                 pm_qos_remove_request(&substream->latency_pm_qos_req);
2014         if (substream->pcm_release) {
2015                 substream->pcm_release(substream);
2016                 substream->pcm_release = NULL;
2017         }
2018         snd_pcm_detach_substream(substream);
2019 }
2020
2021 EXPORT_SYMBOL(snd_pcm_release_substream);
2022
2023 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2024                            struct file *file,
2025                            struct snd_pcm_substream **rsubstream)
2026 {
2027         struct snd_pcm_substream *substream;
2028         int err;
2029
2030         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2031         if (err < 0)
2032                 return err;
2033         if (substream->ref_count > 1) {
2034                 *rsubstream = substream;
2035                 return 0;
2036         }
2037
2038         err = snd_pcm_hw_constraints_init(substream);
2039         if (err < 0) {
2040                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2041                 goto error;
2042         }
2043
2044         if ((err = substream->ops->open(substream)) < 0)
2045                 goto error;
2046
2047         substream->hw_opened = 1;
2048
2049         err = snd_pcm_hw_constraints_complete(substream);
2050         if (err < 0) {
2051                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2052                 goto error;
2053         }
2054
2055         *rsubstream = substream;
2056         return 0;
2057
2058  error:
2059         snd_pcm_release_substream(substream);
2060         return err;
2061 }
2062
2063 EXPORT_SYMBOL(snd_pcm_open_substream);
2064
2065 static int snd_pcm_open_file(struct file *file,
2066                              struct snd_pcm *pcm,
2067                              int stream)
2068 {
2069         struct snd_pcm_file *pcm_file;
2070         struct snd_pcm_substream *substream;
2071         int err;
2072
2073         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2074         if (err < 0)
2075                 return err;
2076
2077         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2078         if (pcm_file == NULL) {
2079                 snd_pcm_release_substream(substream);
2080                 return -ENOMEM;
2081         }
2082         pcm_file->substream = substream;
2083         if (substream->ref_count == 1) {
2084                 substream->file = pcm_file;
2085                 substream->pcm_release = pcm_release_private;
2086         }
2087         file->private_data = pcm_file;
2088
2089         return 0;
2090 }
2091
2092 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2093 {
2094         struct snd_pcm *pcm;
2095         int err = nonseekable_open(inode, file);
2096         if (err < 0)
2097                 return err;
2098         pcm = snd_lookup_minor_data(iminor(inode),
2099                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2100         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2101 }
2102
2103 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2104 {
2105         struct snd_pcm *pcm;
2106         int err = nonseekable_open(inode, file);
2107         if (err < 0)
2108                 return err;
2109         pcm = snd_lookup_minor_data(iminor(inode),
2110                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2111         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2112 }
2113
2114 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2115 {
2116         int err;
2117         wait_queue_t wait;
2118
2119         if (pcm == NULL) {
2120                 err = -ENODEV;
2121                 goto __error1;
2122         }
2123         err = snd_card_file_add(pcm->card, file);
2124         if (err < 0)
2125                 goto __error1;
2126         if (!try_module_get(pcm->card->module)) {
2127                 err = -EFAULT;
2128                 goto __error2;
2129         }
2130         init_waitqueue_entry(&wait, current);
2131         add_wait_queue(&pcm->open_wait, &wait);
2132         mutex_lock(&pcm->open_mutex);
2133         while (1) {
2134                 err = snd_pcm_open_file(file, pcm, stream);
2135                 if (err >= 0)
2136                         break;
2137                 if (err == -EAGAIN) {
2138                         if (file->f_flags & O_NONBLOCK) {
2139                                 err = -EBUSY;
2140                                 break;
2141                         }
2142                 } else
2143                         break;
2144                 set_current_state(TASK_INTERRUPTIBLE);
2145                 mutex_unlock(&pcm->open_mutex);
2146                 schedule();
2147                 mutex_lock(&pcm->open_mutex);
2148                 if (signal_pending(current)) {
2149                         err = -ERESTARTSYS;
2150                         break;
2151                 }
2152         }
2153         remove_wait_queue(&pcm->open_wait, &wait);
2154         mutex_unlock(&pcm->open_mutex);
2155         if (err < 0)
2156                 goto __error;
2157         return err;
2158
2159       __error:
2160         module_put(pcm->card->module);
2161       __error2:
2162         snd_card_file_remove(pcm->card, file);
2163       __error1:
2164         return err;
2165 }
2166
2167 static int snd_pcm_release(struct inode *inode, struct file *file)
2168 {
2169         struct snd_pcm *pcm;
2170         struct snd_pcm_substream *substream;
2171         struct snd_pcm_file *pcm_file;
2172
2173         pcm_file = file->private_data;
2174         substream = pcm_file->substream;
2175         if (snd_BUG_ON(!substream))
2176                 return -ENXIO;
2177         pcm = substream->pcm;
2178         mutex_lock(&pcm->open_mutex);
2179         snd_pcm_release_substream(substream);
2180         kfree(pcm_file);
2181         mutex_unlock(&pcm->open_mutex);
2182         wake_up(&pcm->open_wait);
2183         module_put(pcm->card->module);
2184         snd_card_file_remove(pcm->card, file);
2185         return 0;
2186 }
2187
2188 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2189                                                  snd_pcm_uframes_t frames)
2190 {
2191         struct snd_pcm_runtime *runtime = substream->runtime;
2192         snd_pcm_sframes_t appl_ptr;
2193         snd_pcm_sframes_t ret;
2194         snd_pcm_sframes_t hw_avail;
2195
2196         if (frames == 0)
2197                 return 0;
2198
2199         snd_pcm_stream_lock_irq(substream);
2200         switch (runtime->status->state) {
2201         case SNDRV_PCM_STATE_PREPARED:
2202                 break;
2203         case SNDRV_PCM_STATE_DRAINING:
2204         case SNDRV_PCM_STATE_RUNNING:
2205                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2206                         break;
2207                 /* Fall through */
2208         case SNDRV_PCM_STATE_XRUN:
2209                 ret = -EPIPE;
2210                 goto __end;
2211         case SNDRV_PCM_STATE_SUSPENDED:
2212                 ret = -ESTRPIPE;
2213                 goto __end;
2214         default:
2215                 ret = -EBADFD;
2216                 goto __end;
2217         }
2218
2219         hw_avail = snd_pcm_playback_hw_avail(runtime);
2220         if (hw_avail <= 0) {
2221                 ret = 0;
2222                 goto __end;
2223         }
2224         if (frames > (snd_pcm_uframes_t)hw_avail)
2225                 frames = hw_avail;
2226         appl_ptr = runtime->control->appl_ptr - frames;
2227         if (appl_ptr < 0)
2228                 appl_ptr += runtime->boundary;
2229         runtime->control->appl_ptr = appl_ptr;
2230         ret = frames;
2231  __end:
2232         snd_pcm_stream_unlock_irq(substream);
2233         return ret;
2234 }
2235
2236 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2237                                                 snd_pcm_uframes_t frames)
2238 {
2239         struct snd_pcm_runtime *runtime = substream->runtime;
2240         snd_pcm_sframes_t appl_ptr;
2241         snd_pcm_sframes_t ret;
2242         snd_pcm_sframes_t hw_avail;
2243
2244         if (frames == 0)
2245                 return 0;
2246
2247         snd_pcm_stream_lock_irq(substream);
2248         switch (runtime->status->state) {
2249         case SNDRV_PCM_STATE_PREPARED:
2250         case SNDRV_PCM_STATE_DRAINING:
2251                 break;
2252         case SNDRV_PCM_STATE_RUNNING:
2253                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2254                         break;
2255                 /* Fall through */
2256         case SNDRV_PCM_STATE_XRUN:
2257                 ret = -EPIPE;
2258                 goto __end;
2259         case SNDRV_PCM_STATE_SUSPENDED:
2260                 ret = -ESTRPIPE;
2261                 goto __end;
2262         default:
2263                 ret = -EBADFD;
2264                 goto __end;
2265         }
2266
2267         hw_avail = snd_pcm_capture_hw_avail(runtime);
2268         if (hw_avail <= 0) {
2269                 ret = 0;
2270                 goto __end;
2271         }
2272         if (frames > (snd_pcm_uframes_t)hw_avail)
2273                 frames = hw_avail;
2274         appl_ptr = runtime->control->appl_ptr - frames;
2275         if (appl_ptr < 0)
2276                 appl_ptr += runtime->boundary;
2277         runtime->control->appl_ptr = appl_ptr;
2278         ret = frames;
2279  __end:
2280         snd_pcm_stream_unlock_irq(substream);
2281         return ret;
2282 }
2283
2284 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2285                                                   snd_pcm_uframes_t frames)
2286 {
2287         struct snd_pcm_runtime *runtime = substream->runtime;
2288         snd_pcm_sframes_t appl_ptr;
2289         snd_pcm_sframes_t ret;
2290         snd_pcm_sframes_t avail;
2291
2292         if (frames == 0)
2293                 return 0;
2294
2295         snd_pcm_stream_lock_irq(substream);
2296         switch (runtime->status->state) {
2297         case SNDRV_PCM_STATE_PREPARED:
2298         case SNDRV_PCM_STATE_PAUSED:
2299                 break;
2300         case SNDRV_PCM_STATE_DRAINING:
2301         case SNDRV_PCM_STATE_RUNNING:
2302                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2303                         break;
2304                 /* Fall through */
2305         case SNDRV_PCM_STATE_XRUN:
2306                 ret = -EPIPE;
2307                 goto __end;
2308         case SNDRV_PCM_STATE_SUSPENDED:
2309                 ret = -ESTRPIPE;
2310                 goto __end;
2311         default:
2312                 ret = -EBADFD;
2313                 goto __end;
2314         }
2315
2316         avail = snd_pcm_playback_avail(runtime);
2317         if (avail <= 0) {
2318                 ret = 0;
2319                 goto __end;
2320         }
2321         if (frames > (snd_pcm_uframes_t)avail)
2322                 frames = avail;
2323         appl_ptr = runtime->control->appl_ptr + frames;
2324         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2325                 appl_ptr -= runtime->boundary;
2326         runtime->control->appl_ptr = appl_ptr;
2327         ret = frames;
2328  __end:
2329         snd_pcm_stream_unlock_irq(substream);
2330         return ret;
2331 }
2332
2333 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2334                                                  snd_pcm_uframes_t frames)
2335 {
2336         struct snd_pcm_runtime *runtime = substream->runtime;
2337         snd_pcm_sframes_t appl_ptr;
2338         snd_pcm_sframes_t ret;
2339         snd_pcm_sframes_t avail;
2340
2341         if (frames == 0)
2342                 return 0;
2343
2344         snd_pcm_stream_lock_irq(substream);
2345         switch (runtime->status->state) {
2346         case SNDRV_PCM_STATE_PREPARED:
2347         case SNDRV_PCM_STATE_DRAINING:
2348         case SNDRV_PCM_STATE_PAUSED:
2349                 break;
2350         case SNDRV_PCM_STATE_RUNNING:
2351                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2352                         break;
2353                 /* Fall through */
2354         case SNDRV_PCM_STATE_XRUN:
2355                 ret = -EPIPE;
2356                 goto __end;
2357         case SNDRV_PCM_STATE_SUSPENDED:
2358                 ret = -ESTRPIPE;
2359                 goto __end;
2360         default:
2361                 ret = -EBADFD;
2362                 goto __end;
2363         }
2364
2365         avail = snd_pcm_capture_avail(runtime);
2366         if (avail <= 0) {
2367                 ret = 0;
2368                 goto __end;
2369         }
2370         if (frames > (snd_pcm_uframes_t)avail)
2371                 frames = avail;
2372         appl_ptr = runtime->control->appl_ptr + frames;
2373         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2374                 appl_ptr -= runtime->boundary;
2375         runtime->control->appl_ptr = appl_ptr;
2376         ret = frames;
2377  __end:
2378         snd_pcm_stream_unlock_irq(substream);
2379         return ret;
2380 }
2381
2382 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2383 {
2384         struct snd_pcm_runtime *runtime = substream->runtime;
2385         int err;
2386
2387         snd_pcm_stream_lock_irq(substream);
2388         switch (runtime->status->state) {
2389         case SNDRV_PCM_STATE_DRAINING:
2390                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2391                         goto __badfd;
2392         case SNDRV_PCM_STATE_RUNNING:
2393                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2394                         break;
2395                 /* Fall through */
2396         case SNDRV_PCM_STATE_PREPARED:
2397         case SNDRV_PCM_STATE_SUSPENDED:
2398                 err = 0;
2399                 break;
2400         case SNDRV_PCM_STATE_XRUN:
2401                 err = -EPIPE;
2402                 break;
2403         default:
2404               __badfd:
2405                 err = -EBADFD;
2406                 break;
2407         }
2408         snd_pcm_stream_unlock_irq(substream);
2409         return err;
2410 }
2411
2412 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2413                          snd_pcm_sframes_t __user *res)
2414 {
2415         struct snd_pcm_runtime *runtime = substream->runtime;
2416         int err;
2417         snd_pcm_sframes_t n = 0;
2418
2419         snd_pcm_stream_lock_irq(substream);
2420         switch (runtime->status->state) {
2421         case SNDRV_PCM_STATE_DRAINING:
2422                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2423                         goto __badfd;
2424         case SNDRV_PCM_STATE_RUNNING:
2425                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2426                         break;
2427                 /* Fall through */
2428         case SNDRV_PCM_STATE_PREPARED:
2429         case SNDRV_PCM_STATE_SUSPENDED:
2430                 err = 0;
2431                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2432                         n = snd_pcm_playback_hw_avail(runtime);
2433                 else
2434                         n = snd_pcm_capture_avail(runtime);
2435                 n += runtime->delay;
2436                 break;
2437         case SNDRV_PCM_STATE_XRUN:
2438                 err = -EPIPE;
2439                 break;
2440         default:
2441               __badfd:
2442                 err = -EBADFD;
2443                 break;
2444         }
2445         snd_pcm_stream_unlock_irq(substream);
2446         if (!err)
2447                 if (put_user(n, res))
2448                         err = -EFAULT;
2449         return err;
2450 }
2451
2452 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2453                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2454 {
2455         struct snd_pcm_runtime *runtime = substream->runtime;
2456         struct snd_pcm_sync_ptr sync_ptr;
2457         volatile struct snd_pcm_mmap_status *status;
2458         volatile struct snd_pcm_mmap_control *control;
2459         int err;
2460
2461         memset(&sync_ptr, 0, sizeof(sync_ptr));
2462         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2463                 return -EFAULT;
2464         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2465                 return -EFAULT;
2466         status = runtime->status;
2467         control = runtime->control;
2468         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2469                 err = snd_pcm_hwsync(substream);
2470                 if (err < 0)
2471                         return err;
2472         }
2473         snd_pcm_stream_lock_irq(substream);
2474         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2475                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2476         else
2477                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2478         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2479                 control->avail_min = sync_ptr.c.control.avail_min;
2480         else
2481                 sync_ptr.c.control.avail_min = control->avail_min;
2482         sync_ptr.s.status.state = status->state;
2483         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2484         sync_ptr.s.status.tstamp = status->tstamp;
2485         sync_ptr.s.status.suspended_state = status->suspended_state;
2486         snd_pcm_stream_unlock_irq(substream);
2487         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2488                 return -EFAULT;
2489         return 0;
2490 }
2491
2492 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2493 {
2494         struct snd_pcm_runtime *runtime = substream->runtime;
2495         int arg;
2496
2497         if (get_user(arg, _arg))
2498                 return -EFAULT;
2499         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2500                 return -EINVAL;
2501         runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2502         if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2503                 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2504         return 0;
2505 }
2506
2507 static int snd_pcm_common_ioctl1(struct file *file,
2508                                  struct snd_pcm_substream *substream,
2509                                  unsigned int cmd, void __user *arg)
2510 {
2511         switch (cmd) {
2512         case SNDRV_PCM_IOCTL_PVERSION:
2513                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2514         case SNDRV_PCM_IOCTL_INFO:
2515                 return snd_pcm_info_user(substream, arg);
2516         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2517                 return 0;
2518         case SNDRV_PCM_IOCTL_TTSTAMP:
2519                 return snd_pcm_tstamp(substream, arg);
2520         case SNDRV_PCM_IOCTL_HW_REFINE:
2521                 return snd_pcm_hw_refine_user(substream, arg);
2522         case SNDRV_PCM_IOCTL_HW_PARAMS:
2523                 return snd_pcm_hw_params_user(substream, arg);
2524         case SNDRV_PCM_IOCTL_HW_FREE:
2525                 return snd_pcm_hw_free(substream);
2526         case SNDRV_PCM_IOCTL_SW_PARAMS:
2527                 return snd_pcm_sw_params_user(substream, arg);
2528         case SNDRV_PCM_IOCTL_STATUS:
2529                 return snd_pcm_status_user(substream, arg);
2530         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2531                 return snd_pcm_channel_info_user(substream, arg);
2532         case SNDRV_PCM_IOCTL_PREPARE:
2533                 return snd_pcm_prepare(substream, file);
2534         case SNDRV_PCM_IOCTL_RESET:
2535                 return snd_pcm_reset(substream);
2536         case SNDRV_PCM_IOCTL_START:
2537                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2538         case SNDRV_PCM_IOCTL_LINK:
2539                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2540         case SNDRV_PCM_IOCTL_UNLINK:
2541                 return snd_pcm_unlink(substream);
2542         case SNDRV_PCM_IOCTL_RESUME:
2543                 return snd_pcm_resume(substream);
2544         case SNDRV_PCM_IOCTL_XRUN:
2545                 return snd_pcm_xrun(substream);
2546         case SNDRV_PCM_IOCTL_HWSYNC:
2547                 return snd_pcm_hwsync(substream);
2548         case SNDRV_PCM_IOCTL_DELAY:
2549                 return snd_pcm_delay(substream, arg);
2550         case SNDRV_PCM_IOCTL_SYNC_PTR:
2551                 return snd_pcm_sync_ptr(substream, arg);
2552 #ifdef CONFIG_SND_SUPPORT_OLD_API
2553         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2554                 return snd_pcm_hw_refine_old_user(substream, arg);
2555         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2556                 return snd_pcm_hw_params_old_user(substream, arg);
2557 #endif
2558         case SNDRV_PCM_IOCTL_DRAIN:
2559                 return snd_pcm_drain(substream, file);
2560         case SNDRV_PCM_IOCTL_DROP:
2561                 return snd_pcm_drop(substream);
2562         case SNDRV_PCM_IOCTL_PAUSE:
2563         {
2564                 int res;
2565                 snd_pcm_stream_lock_irq(substream);
2566                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2567                 snd_pcm_stream_unlock_irq(substream);
2568                 return res;
2569         }
2570         }
2571         snd_printd("unknown ioctl = 0x%x\n", cmd);
2572         return -ENOTTY;
2573 }
2574
2575 static int snd_pcm_playback_ioctl1(struct file *file,
2576                                    struct snd_pcm_substream *substream,
2577                                    unsigned int cmd, void __user *arg)
2578 {
2579         if (snd_BUG_ON(!substream))
2580                 return -ENXIO;
2581         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2582                 return -EINVAL;
2583         switch (cmd) {
2584         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2585         {
2586                 struct snd_xferi xferi;
2587                 struct snd_xferi __user *_xferi = arg;
2588                 struct snd_pcm_runtime *runtime = substream->runtime;
2589                 snd_pcm_sframes_t result;
2590                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2591                         return -EBADFD;
2592                 if (put_user(0, &_xferi->result))
2593                         return -EFAULT;
2594                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2595                         return -EFAULT;
2596                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2597                 __put_user(result, &_xferi->result);
2598                 return result < 0 ? result : 0;
2599         }
2600         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2601         {
2602                 struct snd_xfern xfern;
2603                 struct snd_xfern __user *_xfern = arg;
2604                 struct snd_pcm_runtime *runtime = substream->runtime;
2605                 void __user **bufs;
2606                 snd_pcm_sframes_t result;
2607                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2608                         return -EBADFD;
2609                 if (runtime->channels > 128)
2610                         return -EINVAL;
2611                 if (put_user(0, &_xfern->result))
2612                         return -EFAULT;
2613                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2614                         return -EFAULT;
2615
2616                 bufs = memdup_user(xfern.bufs,
2617                                    sizeof(void *) * runtime->channels);
2618                 if (IS_ERR(bufs))
2619                         return PTR_ERR(bufs);
2620                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2621                 kfree(bufs);
2622                 __put_user(result, &_xfern->result);
2623                 return result < 0 ? result : 0;
2624         }
2625         case SNDRV_PCM_IOCTL_REWIND:
2626         {
2627                 snd_pcm_uframes_t frames;
2628                 snd_pcm_uframes_t __user *_frames = arg;
2629                 snd_pcm_sframes_t result;
2630                 if (get_user(frames, _frames))
2631                         return -EFAULT;
2632                 if (put_user(0, _frames))
2633                         return -EFAULT;
2634                 result = snd_pcm_playback_rewind(substream, frames);
2635                 __put_user(result, _frames);
2636                 return result < 0 ? result : 0;
2637         }
2638         case SNDRV_PCM_IOCTL_FORWARD:
2639         {
2640                 snd_pcm_uframes_t frames;
2641                 snd_pcm_uframes_t __user *_frames = arg;
2642                 snd_pcm_sframes_t result;
2643                 if (get_user(frames, _frames))
2644                         return -EFAULT;
2645                 if (put_user(0, _frames))
2646                         return -EFAULT;
2647                 result = snd_pcm_playback_forward(substream, frames);
2648                 __put_user(result, _frames);
2649                 return result < 0 ? result : 0;
2650         }
2651         }
2652         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2653 }
2654
2655 static int snd_pcm_capture_ioctl1(struct file *file,
2656                                   struct snd_pcm_substream *substream,
2657                                   unsigned int cmd, void __user *arg)
2658 {
2659         if (snd_BUG_ON(!substream))
2660                 return -ENXIO;
2661         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2662                 return -EINVAL;
2663         switch (cmd) {
2664         case SNDRV_PCM_IOCTL_READI_FRAMES:
2665         {
2666                 struct snd_xferi xferi;
2667                 struct snd_xferi __user *_xferi = arg;
2668                 struct snd_pcm_runtime *runtime = substream->runtime;
2669                 snd_pcm_sframes_t result;
2670                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2671                         return -EBADFD;
2672                 if (put_user(0, &_xferi->result))
2673                         return -EFAULT;
2674                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2675                         return -EFAULT;
2676                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2677                 __put_user(result, &_xferi->result);
2678                 return result < 0 ? result : 0;
2679         }
2680         case SNDRV_PCM_IOCTL_READN_FRAMES:
2681         {
2682                 struct snd_xfern xfern;
2683                 struct snd_xfern __user *_xfern = arg;
2684                 struct snd_pcm_runtime *runtime = substream->runtime;
2685                 void *bufs;
2686                 snd_pcm_sframes_t result;
2687                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2688                         return -EBADFD;
2689                 if (runtime->channels > 128)
2690                         return -EINVAL;
2691                 if (put_user(0, &_xfern->result))
2692                         return -EFAULT;
2693                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2694                         return -EFAULT;
2695
2696                 bufs = memdup_user(xfern.bufs,
2697                                    sizeof(void *) * runtime->channels);
2698                 if (IS_ERR(bufs))
2699                         return PTR_ERR(bufs);
2700                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2701                 kfree(bufs);
2702                 __put_user(result, &_xfern->result);
2703                 return result < 0 ? result : 0;
2704         }
2705         case SNDRV_PCM_IOCTL_REWIND:
2706         {
2707                 snd_pcm_uframes_t frames;
2708                 snd_pcm_uframes_t __user *_frames = arg;
2709                 snd_pcm_sframes_t result;
2710                 if (get_user(frames, _frames))
2711                         return -EFAULT;
2712                 if (put_user(0, _frames))
2713                         return -EFAULT;
2714                 result = snd_pcm_capture_rewind(substream, frames);
2715                 __put_user(result, _frames);
2716                 return result < 0 ? result : 0;
2717         }
2718         case SNDRV_PCM_IOCTL_FORWARD:
2719         {
2720                 snd_pcm_uframes_t frames;
2721                 snd_pcm_uframes_t __user *_frames = arg;
2722                 snd_pcm_sframes_t result;
2723                 if (get_user(frames, _frames))
2724                         return -EFAULT;
2725                 if (put_user(0, _frames))
2726                         return -EFAULT;
2727                 result = snd_pcm_capture_forward(substream, frames);
2728                 __put_user(result, _frames);
2729                 return result < 0 ? result : 0;
2730         }
2731         }
2732         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2733 }
2734
2735 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2736                                    unsigned long arg)
2737 {
2738         struct snd_pcm_file *pcm_file;
2739
2740         pcm_file = file->private_data;
2741
2742         if (((cmd >> 8) & 0xff) != 'A')
2743                 return -ENOTTY;
2744
2745         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2746                                        (void __user *)arg);
2747 }
2748
2749 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2750                                   unsigned long arg)
2751 {
2752         struct snd_pcm_file *pcm_file;
2753
2754         pcm_file = file->private_data;
2755
2756         if (((cmd >> 8) & 0xff) != 'A')
2757                 return -ENOTTY;
2758
2759         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2760                                       (void __user *)arg);
2761 }
2762
2763 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2764                          unsigned int cmd, void *arg)
2765 {
2766         mm_segment_t fs;
2767         int result;
2768
2769         fs = snd_enter_user();
2770         switch (substream->stream) {
2771         case SNDRV_PCM_STREAM_PLAYBACK:
2772                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2773                                                  (void __user *)arg);
2774                 break;
2775         case SNDRV_PCM_STREAM_CAPTURE:
2776                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2777                                                 (void __user *)arg);
2778                 break;
2779         default:
2780                 result = -EINVAL;
2781                 break;
2782         }
2783         snd_leave_user(fs);
2784         return result;
2785 }
2786
2787 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2788
2789 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2790                             loff_t * offset)
2791 {
2792         struct snd_pcm_file *pcm_file;
2793         struct snd_pcm_substream *substream;
2794         struct snd_pcm_runtime *runtime;
2795         snd_pcm_sframes_t result;
2796
2797         pcm_file = file->private_data;
2798         substream = pcm_file->substream;
2799         if (PCM_RUNTIME_CHECK(substream))
2800                 return -ENXIO;
2801         runtime = substream->runtime;
2802         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2803                 return -EBADFD;
2804         if (!frame_aligned(runtime, count))
2805                 return -EINVAL;
2806         count = bytes_to_frames(runtime, count);
2807         result = snd_pcm_lib_read(substream, buf, count);
2808         if (result > 0)
2809                 result = frames_to_bytes(runtime, result);
2810         return result;
2811 }
2812
2813 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2814                              size_t count, loff_t * offset)
2815 {
2816         struct snd_pcm_file *pcm_file;
2817         struct snd_pcm_substream *substream;
2818         struct snd_pcm_runtime *runtime;
2819         snd_pcm_sframes_t result;
2820
2821         pcm_file = file->private_data;
2822         substream = pcm_file->substream;
2823         if (PCM_RUNTIME_CHECK(substream))
2824                 return -ENXIO;
2825         runtime = substream->runtime;
2826         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2827                 return -EBADFD;
2828         if (!frame_aligned(runtime, count))
2829                 return -EINVAL;
2830         count = bytes_to_frames(runtime, count);
2831         result = snd_pcm_lib_write(substream, buf, count);
2832         if (result > 0)
2833                 result = frames_to_bytes(runtime, result);
2834         return result;
2835 }
2836
2837 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2838                              unsigned long nr_segs, loff_t pos)
2839
2840 {
2841         struct snd_pcm_file *pcm_file;
2842         struct snd_pcm_substream *substream;
2843         struct snd_pcm_runtime *runtime;
2844         snd_pcm_sframes_t result;
2845         unsigned long i;
2846         void __user **bufs;
2847         snd_pcm_uframes_t frames;
2848
2849         pcm_file = iocb->ki_filp->private_data;
2850         substream = pcm_file->substream;
2851         if (PCM_RUNTIME_CHECK(substream))
2852                 return -ENXIO;
2853         runtime = substream->runtime;
2854         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2855                 return -EBADFD;
2856         if (nr_segs > 1024 || nr_segs != runtime->channels)
2857                 return -EINVAL;
2858         if (!frame_aligned(runtime, iov->iov_len))
2859                 return -EINVAL;
2860         frames = bytes_to_samples(runtime, iov->iov_len);
2861         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2862         if (bufs == NULL)
2863                 return -ENOMEM;
2864         for (i = 0; i < nr_segs; ++i)
2865                 bufs[i] = iov[i].iov_base;
2866         result = snd_pcm_lib_readv(substream, bufs, frames);
2867         if (result > 0)
2868                 result = frames_to_bytes(runtime, result);
2869         kfree(bufs);
2870         return result;
2871 }
2872
2873 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2874                               unsigned long nr_segs, loff_t pos)
2875 {
2876         struct snd_pcm_file *pcm_file;
2877         struct snd_pcm_substream *substream;
2878         struct snd_pcm_runtime *runtime;
2879         snd_pcm_sframes_t result;
2880         unsigned long i;
2881         void __user **bufs;
2882         snd_pcm_uframes_t frames;
2883
2884         pcm_file = iocb->ki_filp->private_data;
2885         substream = pcm_file->substream;
2886         if (PCM_RUNTIME_CHECK(substream))
2887                 return -ENXIO;
2888         runtime = substream->runtime;
2889         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2890                 return -EBADFD;
2891         if (nr_segs > 128 || nr_segs != runtime->channels ||
2892             !frame_aligned(runtime, iov->iov_len))
2893                 return -EINVAL;
2894         frames = bytes_to_samples(runtime, iov->iov_len);
2895         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2896         if (bufs == NULL)
2897                 return -ENOMEM;
2898         for (i = 0; i < nr_segs; ++i)
2899                 bufs[i] = iov[i].iov_base;
2900         result = snd_pcm_lib_writev(substream, bufs, frames);
2901         if (result > 0)
2902                 result = frames_to_bytes(runtime, result);
2903         kfree(bufs);
2904         return result;
2905 }
2906
2907 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2908 {
2909         struct snd_pcm_file *pcm_file;
2910         struct snd_pcm_substream *substream;
2911         struct snd_pcm_runtime *runtime;
2912         unsigned int mask;
2913         snd_pcm_uframes_t avail;
2914
2915         pcm_file = file->private_data;
2916
2917         substream = pcm_file->substream;
2918         if (PCM_RUNTIME_CHECK(substream))
2919                 return -ENXIO;
2920         runtime = substream->runtime;
2921
2922         poll_wait(file, &runtime->sleep, wait);
2923
2924         snd_pcm_stream_lock_irq(substream);
2925         avail = snd_pcm_playback_avail(runtime);
2926         switch (runtime->status->state) {
2927         case SNDRV_PCM_STATE_RUNNING:
2928         case SNDRV_PCM_STATE_PREPARED:
2929         case SNDRV_PCM_STATE_PAUSED:
2930                 if (avail >= runtime->control->avail_min) {
2931                         mask = POLLOUT | POLLWRNORM;
2932                         break;
2933                 }
2934                 /* Fall through */
2935         case SNDRV_PCM_STATE_DRAINING:
2936                 mask = 0;
2937                 break;
2938         default:
2939                 mask = POLLOUT | POLLWRNORM | POLLERR;
2940                 break;
2941         }
2942         snd_pcm_stream_unlock_irq(substream);
2943         return mask;
2944 }
2945
2946 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2947 {
2948         struct snd_pcm_file *pcm_file;
2949         struct snd_pcm_substream *substream;
2950         struct snd_pcm_runtime *runtime;
2951         unsigned int mask;
2952         snd_pcm_uframes_t avail;
2953
2954         pcm_file = file->private_data;
2955
2956         substream = pcm_file->substream;
2957         if (PCM_RUNTIME_CHECK(substream))
2958                 return -ENXIO;
2959         runtime = substream->runtime;
2960
2961         poll_wait(file, &runtime->sleep, wait);
2962
2963         snd_pcm_stream_lock_irq(substream);
2964         avail = snd_pcm_capture_avail(runtime);
2965         switch (runtime->status->state) {
2966         case SNDRV_PCM_STATE_RUNNING:
2967         case SNDRV_PCM_STATE_PREPARED:
2968         case SNDRV_PCM_STATE_PAUSED:
2969                 if (avail >= runtime->control->avail_min) {
2970                         mask = POLLIN | POLLRDNORM;
2971                         break;
2972                 }
2973                 mask = 0;
2974                 break;
2975         case SNDRV_PCM_STATE_DRAINING:
2976                 if (avail > 0) {
2977                         mask = POLLIN | POLLRDNORM;
2978                         break;
2979                 }
2980                 /* Fall through */
2981         default:
2982                 mask = POLLIN | POLLRDNORM | POLLERR;
2983                 break;
2984         }
2985         snd_pcm_stream_unlock_irq(substream);
2986         return mask;
2987 }
2988
2989 /*
2990  * mmap support
2991  */
2992
2993 /*
2994  * Only on coherent architectures, we can mmap the status and the control records
2995  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
2996  */
2997 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2998 /*
2999  * mmap status record
3000  */
3001 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3002                                                 struct vm_fault *vmf)
3003 {
3004         struct snd_pcm_substream *substream = area->vm_private_data;
3005         struct snd_pcm_runtime *runtime;
3006
3007         if (substream == NULL)
3008                 return VM_FAULT_SIGBUS;
3009         runtime = substream->runtime;
3010         vmf->page = virt_to_page(runtime->status);
3011         get_page(vmf->page);
3012         return 0;
3013 }
3014
3015 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3016 {
3017         .fault =        snd_pcm_mmap_status_fault,
3018 };
3019
3020 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3021                                struct vm_area_struct *area)
3022 {
3023         long size;
3024         if (!(area->vm_flags & VM_READ))
3025                 return -EINVAL;
3026         size = area->vm_end - area->vm_start;
3027         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3028                 return -EINVAL;
3029         area->vm_ops = &snd_pcm_vm_ops_status;
3030         area->vm_private_data = substream;
3031         area->vm_flags |= VM_RESERVED;
3032         return 0;
3033 }
3034
3035 /*
3036  * mmap control record
3037  */
3038 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3039                                                 struct vm_fault *vmf)
3040 {
3041         struct snd_pcm_substream *substream = area->vm_private_data;
3042         struct snd_pcm_runtime *runtime;
3043
3044         if (substream == NULL)
3045                 return VM_FAULT_SIGBUS;
3046         runtime = substream->runtime;
3047         vmf->page = virt_to_page(runtime->control);
3048         get_page(vmf->page);
3049         return 0;
3050 }
3051
3052 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3053 {
3054         .fault =        snd_pcm_mmap_control_fault,
3055 };
3056
3057 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3058                                 struct vm_area_struct *area)
3059 {
3060         long size;
3061         if (!(area->vm_flags & VM_READ))
3062                 return -EINVAL;
3063         size = area->vm_end - area->vm_start;
3064         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3065                 return -EINVAL;
3066         area->vm_ops = &snd_pcm_vm_ops_control;
3067         area->vm_private_data = substream;
3068         area->vm_flags |= VM_RESERVED;
3069         return 0;
3070 }
3071 #else /* ! coherent mmap */
3072 /*
3073  * don't support mmap for status and control records.
3074  */
3075 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3076                                struct vm_area_struct *area)
3077 {
3078         return -ENXIO;
3079 }
3080 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3081                                 struct vm_area_struct *area)
3082 {
3083         return -ENXIO;
3084 }
3085 #endif /* coherent mmap */
3086
3087 static inline struct page *
3088 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3089 {
3090         void *vaddr = substream->runtime->dma_area + ofs;
3091 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3092         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3093                 return virt_to_page(CAC_ADDR(vaddr));
3094 #endif
3095 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3096         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3097                 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3098                 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3099                 /* assume dma_handle set via pfn_to_phys() in
3100                  * mm/dma-noncoherent.c
3101                  */
3102                 return pfn_to_page(addr >> PAGE_SHIFT);
3103         }
3104 #endif
3105         return virt_to_page(vaddr);
3106 }
3107
3108 /*
3109  * fault callback for mmapping a RAM page
3110  */
3111 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3112                                                 struct vm_fault *vmf)
3113 {
3114         struct snd_pcm_substream *substream = area->vm_private_data;
3115         struct snd_pcm_runtime *runtime;
3116         unsigned long offset;
3117         struct page * page;
3118         size_t dma_bytes;
3119
3120         if (substream == NULL)
3121                 return VM_FAULT_SIGBUS;
3122         runtime = substream->runtime;
3123         offset = vmf->pgoff << PAGE_SHIFT;
3124         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3125         if (offset > dma_bytes - PAGE_SIZE)
3126                 return VM_FAULT_SIGBUS;
3127         if (substream->ops->page)
3128                 page = substream->ops->page(substream, offset);
3129         else
3130                 page = snd_pcm_default_page_ops(substream, offset);
3131         if (!page)
3132                 return VM_FAULT_SIGBUS;
3133         get_page(page);
3134         vmf->page = page;
3135         return 0;
3136 }
3137
3138 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3139         .open =         snd_pcm_mmap_data_open,
3140         .close =        snd_pcm_mmap_data_close,
3141 };
3142
3143 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3144         .open =         snd_pcm_mmap_data_open,
3145         .close =        snd_pcm_mmap_data_close,
3146         .fault =        snd_pcm_mmap_data_fault,
3147 };
3148
3149 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3150 /* This should be defined / handled globally! */
3151 #ifdef CONFIG_ARM
3152 #define ARCH_HAS_DMA_MMAP_COHERENT
3153 #endif
3154 #endif
3155
3156 /*
3157  * mmap the DMA buffer on RAM
3158  */
3159 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3160                              struct vm_area_struct *area)
3161 {
3162         area->vm_flags |= VM_RESERVED;
3163 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3164         if (!substream->ops->page &&
3165             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3166                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3167                                          area,
3168                                          substream->runtime->dma_area,
3169                                          substream->runtime->dma_addr,
3170                                          area->vm_end - area->vm_start);
3171 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3172         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3173             !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3174                 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3175 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3176         /* mmap with fault handler */
3177         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3178         return 0;
3179 }
3180 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3181
3182 /*
3183  * mmap the DMA buffer on I/O memory area
3184  */
3185 #if SNDRV_PCM_INFO_MMAP_IOMEM
3186 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3187                            struct vm_area_struct *area)
3188 {
3189         long size;
3190         unsigned long offset;
3191
3192         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3193         area->vm_flags |= VM_IO;
3194         size = area->vm_end - area->vm_start;
3195         offset = area->vm_pgoff << PAGE_SHIFT;
3196         if (io_remap_pfn_range(area, area->vm_start,
3197                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3198                                 size, area->vm_page_prot))
3199                 return -EAGAIN;
3200         return 0;
3201 }
3202
3203 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3204 #endif /* SNDRV_PCM_INFO_MMAP */
3205
3206 /*
3207  * mmap DMA buffer
3208  */
3209 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3210                       struct vm_area_struct *area)
3211 {
3212         struct snd_pcm_runtime *runtime;
3213         long size;
3214         unsigned long offset;
3215         size_t dma_bytes;
3216         int err;
3217
3218         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3219                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3220                         return -EINVAL;
3221         } else {
3222                 if (!(area->vm_flags & VM_READ))
3223                         return -EINVAL;
3224         }
3225         runtime = substream->runtime;
3226         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3227                 return -EBADFD;
3228         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3229                 return -ENXIO;
3230         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3231             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3232                 return -EINVAL;
3233         size = area->vm_end - area->vm_start;
3234         offset = area->vm_pgoff << PAGE_SHIFT;
3235         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3236         if ((size_t)size > dma_bytes)
3237                 return -EINVAL;
3238         if (offset > dma_bytes - size)
3239                 return -EINVAL;
3240
3241         area->vm_ops = &snd_pcm_vm_ops_data;
3242         area->vm_private_data = substream;
3243         if (substream->ops->mmap)
3244                 err = substream->ops->mmap(substream, area);
3245         else
3246                 err = snd_pcm_lib_default_mmap(substream, area);
3247         if (!err)
3248                 atomic_inc(&substream->mmap_count);
3249         return err;
3250 }
3251
3252 EXPORT_SYMBOL(snd_pcm_mmap_data);
3253
3254 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3255 {
3256         struct snd_pcm_file * pcm_file;
3257         struct snd_pcm_substream *substream;
3258         unsigned long offset;
3259
3260         pcm_file = file->private_data;
3261         substream = pcm_file->substream;
3262         if (PCM_RUNTIME_CHECK(substream))
3263                 return -ENXIO;
3264
3265         offset = area->vm_pgoff << PAGE_SHIFT;
3266         switch (offset) {
3267         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3268                 if (pcm_file->no_compat_mmap)
3269                         return -ENXIO;
3270                 return snd_pcm_mmap_status(substream, file, area);
3271         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3272                 if (pcm_file->no_compat_mmap)
3273                         return -ENXIO;
3274                 return snd_pcm_mmap_control(substream, file, area);
3275         default:
3276                 return snd_pcm_mmap_data(substream, file, area);
3277         }
3278         return 0;
3279 }
3280
3281 static int snd_pcm_fasync(int fd, struct file * file, int on)
3282 {
3283         struct snd_pcm_file * pcm_file;
3284         struct snd_pcm_substream *substream;
3285         struct snd_pcm_runtime *runtime;
3286
3287         pcm_file = file->private_data;
3288         substream = pcm_file->substream;
3289         if (PCM_RUNTIME_CHECK(substream))
3290                 return -ENXIO;
3291         runtime = substream->runtime;
3292         return fasync_helper(fd, file, on, &runtime->fasync);
3293 }
3294
3295 /*
3296  * ioctl32 compat
3297  */
3298 #ifdef CONFIG_COMPAT
3299 #include "pcm_compat.c"
3300 #else
3301 #define snd_pcm_ioctl_compat    NULL
3302 #endif
3303
3304 /*
3305  *  To be removed helpers to keep binary compatibility
3306  */
3307
3308 #ifdef CONFIG_SND_SUPPORT_OLD_API
3309 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3310 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3311
3312 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3313                                                struct snd_pcm_hw_params_old *oparams)
3314 {
3315         unsigned int i;
3316
3317         memset(params, 0, sizeof(*params));
3318         params->flags = oparams->flags;
3319         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3320                 params->masks[i].bits[0] = oparams->masks[i];
3321         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3322         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3323         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3324         params->info = oparams->info;
3325         params->msbits = oparams->msbits;
3326         params->rate_num = oparams->rate_num;
3327         params->rate_den = oparams->rate_den;
3328         params->fifo_size = oparams->fifo_size;
3329 }
3330
3331 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3332                                              struct snd_pcm_hw_params *params)
3333 {
3334         unsigned int i;
3335
3336         memset(oparams, 0, sizeof(*oparams));
3337         oparams->flags = params->flags;
3338         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3339                 oparams->masks[i] = params->masks[i].bits[0];
3340         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3341         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3342         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3343         oparams->info = params->info;
3344         oparams->msbits = params->msbits;
3345         oparams->rate_num = params->rate_num;
3346         oparams->rate_den = params->rate_den;
3347         oparams->fifo_size = params->fifo_size;
3348 }
3349
3350 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3351                                       struct snd_pcm_hw_params_old __user * _oparams)
3352 {
3353         struct snd_pcm_hw_params *params;
3354         struct snd_pcm_hw_params_old *oparams = NULL;
3355         int err;
3356
3357         params = kmalloc(sizeof(*params), GFP_KERNEL);
3358         if (!params)
3359                 return -ENOMEM;
3360
3361         oparams = memdup_user(_oparams, sizeof(*oparams));
3362         if (IS_ERR(oparams)) {
3363                 err = PTR_ERR(oparams);
3364                 goto out;
3365         }
3366         snd_pcm_hw_convert_from_old_params(params, oparams);
3367         err = snd_pcm_hw_refine(substream, params);
3368         snd_pcm_hw_convert_to_old_params(oparams, params);
3369         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3370                 if (!err)
3371                         err = -EFAULT;
3372         }
3373
3374         kfree(oparams);
3375 out:
3376         kfree(params);
3377         return err;
3378 }
3379
3380 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3381                                       struct snd_pcm_hw_params_old __user * _oparams)
3382 {
3383         struct snd_pcm_hw_params *params;
3384         struct snd_pcm_hw_params_old *oparams = NULL;
3385         int err;
3386
3387         params = kmalloc(sizeof(*params), GFP_KERNEL);
3388         if (!params)
3389                 return -ENOMEM;
3390
3391         oparams = memdup_user(_oparams, sizeof(*oparams));
3392         if (IS_ERR(oparams)) {
3393                 err = PTR_ERR(oparams);
3394                 goto out;
3395         }
3396         snd_pcm_hw_convert_from_old_params(params, oparams);
3397         err = snd_pcm_hw_params(substream, params);
3398         snd_pcm_hw_convert_to_old_params(oparams, params);
3399         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3400                 if (!err)
3401                         err = -EFAULT;
3402         }
3403
3404         kfree(oparams);
3405 out:
3406         kfree(params);
3407         return err;
3408 }
3409 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3410
3411 #ifndef CONFIG_MMU
3412 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3413                                                unsigned long addr,
3414                                                unsigned long len,
3415                                                unsigned long pgoff,
3416                                                unsigned long flags)
3417 {
3418         struct snd_pcm_file *pcm_file = file->private_data;
3419         struct snd_pcm_substream *substream = pcm_file->substream;
3420         struct snd_pcm_runtime *runtime = substream->runtime;
3421         unsigned long offset = pgoff << PAGE_SHIFT;
3422
3423         switch (offset) {
3424         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3425                 return (unsigned long)runtime->status;
3426         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3427                 return (unsigned long)runtime->control;
3428         default:
3429                 return (unsigned long)runtime->dma_area + offset;
3430         }
3431 }
3432 #else
3433 # define snd_pcm_get_unmapped_area NULL
3434 #endif
3435
3436 /*
3437  *  Register section
3438  */
3439
3440 const struct file_operations snd_pcm_f_ops[2] = {
3441         {
3442                 .owner =                THIS_MODULE,
3443                 .write =                snd_pcm_write,
3444                 .aio_write =            snd_pcm_aio_write,
3445                 .open =                 snd_pcm_playback_open,
3446                 .release =              snd_pcm_release,
3447                 .llseek =               no_llseek,
3448                 .poll =                 snd_pcm_playback_poll,
3449                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3450                 .compat_ioctl =         snd_pcm_ioctl_compat,
3451                 .mmap =                 snd_pcm_mmap,
3452                 .fasync =               snd_pcm_fasync,
3453                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3454         },
3455         {
3456                 .owner =                THIS_MODULE,
3457                 .read =                 snd_pcm_read,
3458                 .aio_read =             snd_pcm_aio_read,
3459                 .open =                 snd_pcm_capture_open,
3460                 .release =              snd_pcm_release,
3461                 .llseek =               no_llseek,
3462                 .poll =                 snd_pcm_capture_poll,
3463                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3464                 .compat_ioctl =         snd_pcm_ioctl_compat,
3465                 .mmap =                 snd_pcm_mmap,
3466                 .fasync =               snd_pcm_fasync,
3467                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3468         }
3469 };