sound/core/pcm_native.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include <linux/mm.h>
  23 #include <linux/file.h>
  24 #include <linux/slab.h>
  25 #include <linux/time.h>
  26 #include <linux/pm_qos_params.h>
  27 #include <linux/uio.h>
  28 #include <linux/dma-mapping.h>
  29 #include <sound/core.h>
  30 #include <sound/control.h>
  31 #include <sound/info.h>
  32 #include <sound/pcm.h>
  33 #include <sound/pcm_params.h>
  34 #include <sound/timer.h>
  35 #include <sound/minors.h>
  36 #include <asm/io.h>
  37 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
  38 #include <dma-coherence.h>
  39 #endif
  40
  41 /*
  42  *  Compatibility
  43  */
  44
  45 struct snd_pcm_hw_params_old {
  46         unsigned int flags;
  47         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
  48                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
  49         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
  50                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
  51         unsigned int rmask;
  52         unsigned int cmask;
  53         unsigned int info;
  54         unsigned int msbits;
  55         unsigned int rate_num;
  56         unsigned int rate_den;
  57         snd_pcm_uframes_t fifo_size;
  58         unsigned char reserved[64];
  59 };
  60
  61 #ifdef CONFIG_SND_SUPPORT_OLD_API
  62 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
  63 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
  64
  65 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
  66                                       struct snd_pcm_hw_params_old __user * _oparams);
  67 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
  68                                       struct snd_pcm_hw_params_old __user * _oparams);
  69 #endif
  70 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
  71
  72 /*
  73  *
  74  */
  75
  76 DEFINE_RWLOCK(snd_pcm_link_rwlock);
  77 EXPORT_SYMBOL(snd_pcm_link_rwlock);
  78
  79 static DECLARE_RWSEM(snd_pcm_link_rwsem);
  80
  81 static inline mm_segment_t snd_enter_user(void)
  82 {
  83         mm_segment_t fs = get_fs();
  84         set_fs(get_ds());
  85         return fs;
  86 }
  87
  88 static inline void snd_leave_user(mm_segment_t fs)
  89 {
  90         set_fs(fs);
  91 }
  92
  93
  94
  95 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
  96 {
  97         struct snd_pcm_runtime *runtime;
  98         struct snd_pcm *pcm = substream->pcm;
  99         struct snd_pcm_str *pstr = substream->pstr;
 100
 101         memset(info, 0, sizeof(*info));
 102         info->card = pcm->card->number;
 103         info->device = pcm->device;
 104         info->stream = substream->stream;
 105         info->subdevice = substream->number;
 106         strlcpy(info->id, pcm->id, sizeof(info->id));
 107         strlcpy(info->name, pcm->name, sizeof(info->name));
 108         info->dev_class = pcm->dev_class;
 109         info->dev_subclass = pcm->dev_subclass;
 110         info->subdevices_count = pstr->substream_count;
 111         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 112         strlcpy(info->subname, substream->name, sizeof(info->subname));
 113         runtime = substream->runtime;
 114         /* AB: FIXME!!! This is definitely nonsense */
 115         if (runtime) {
 116                 info->sync = runtime->sync;
 117                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
 118         }
 119         return 0;
 120 }
 121
 122 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 123                       struct snd_pcm_info __user * _info)
 124 {
 125         struct snd_pcm_info *info;
 126         int err;
 127
 128         info = kmalloc(sizeof(*info), GFP_KERNEL);
 129         if (! info)
 130                 return -ENOMEM;
 131         err = snd_pcm_info(substream, info);
 132         if (err >= 0) {
 133                 if (copy_to_user(_info, info, sizeof(*info)))
 134                         err = -EFAULT;
 135         }
 136         kfree(info);
 137         return err;
 138 }
 139
 140 #undef RULES_DEBUG
 141
 142 #ifdef RULES_DEBUG
 143 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
 144 static const char * const snd_pcm_hw_param_names[] = {
 145         HW_PARAM(ACCESS),
 146         HW_PARAM(FORMAT),
 147         HW_PARAM(SUBFORMAT),
 148         HW_PARAM(SAMPLE_BITS),
 149         HW_PARAM(FRAME_BITS),
 150         HW_PARAM(CHANNELS),
 151         HW_PARAM(RATE),
 152         HW_PARAM(PERIOD_TIME),
 153         HW_PARAM(PERIOD_SIZE),
 154         HW_PARAM(PERIOD_BYTES),
 155         HW_PARAM(PERIODS),
 156         HW_PARAM(BUFFER_TIME),
 157         HW_PARAM(BUFFER_SIZE),
 158         HW_PARAM(BUFFER_BYTES),
 159         HW_PARAM(TICK_TIME),
 160 };
 161 #endif
 162
 163 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
 164                       struct snd_pcm_hw_params *params)
 165 {
 166         unsigned int k;
 167         struct snd_pcm_hardware *hw;
 168         struct snd_interval *i = NULL;
 169         struct snd_mask *m = NULL;
 170         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
 171         unsigned int rstamps[constrs->rules_num];
 172         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 173         unsigned int stamp = 2;
 174         int changed, again;
 175
 176         params->info = 0;
 177         params->fifo_size = 0;
 178         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
 179                 params->msbits = 0;
 180         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
 181                 params->rate_num = 0;
 182                 params->rate_den = 0;
 183         }
 184
 185         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
 186                 m = hw_param_mask(params, k);
 187                 if (snd_mask_empty(m))
 188                         return -EINVAL;
 189                 if (!(params->rmask & (1 << k)))
 190                         continue;
 191 #ifdef RULES_DEBUG
 192                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 193                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 194 #endif
 195                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
 196 #ifdef RULES_DEBUG
 197                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 198 #endif
 199                 if (changed)
 200                         params->cmask |= 1 << k;
 201                 if (changed < 0)
 202                         return changed;
 203         }
 204
 205         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
 206                 i = hw_param_interval(params, k);
 207                 if (snd_interval_empty(i))
 208                         return -EINVAL;
 209                 if (!(params->rmask & (1 << k)))
 210                         continue;
 211 #ifdef RULES_DEBUG
 212                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 213                 if (i->empty)
 214                         printk("empty");
 215                 else
 216                         printk("%c%u %u%c",
 217                                i->openmin ? '(' : '[', i->min,
 218                                i->max, i->openmax ? ')' : ']');
 219                 printk(" -> ");
 220 #endif
 221                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
 222 #ifdef RULES_DEBUG
 223                 if (i->empty)
 224                         printk("empty\n");
 225                 else
 226                         printk("%c%u %u%c\n",
 227                                i->openmin ? '(' : '[', i->min,
 228                                i->max, i->openmax ? ')' : ']');
 229 #endif
 230                 if (changed)
 231                         params->cmask |= 1 << k;
 232                 if (changed < 0)
 233                         return changed;
 234         }
 235
 236         for (k = 0; k < constrs->rules_num; k++)
 237                 rstamps[k] = 0;
 238         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
 239                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
 240         do {
 241                 again = 0;
 242                 for (k = 0; k < constrs->rules_num; k++) {
 243                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
 244                         unsigned int d;
 245                         int doit = 0;
 246                         if (r->cond && !(r->cond & params->flags))
 247                                 continue;
 248                         for (d = 0; r->deps[d] >= 0; d++) {
 249                                 if (vstamps[r->deps[d]] > rstamps[k]) {
 250                                         doit = 1;
 251                                         break;
 252                                 }
 253                         }
 254                         if (!doit)
 255                                 continue;
 256 #ifdef RULES_DEBUG
 257                         printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
 258                         if (r->var >= 0) {
 259                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
 260                                 if (hw_is_mask(r->var)) {
 261                                         m = hw_param_mask(params, r->var);
 262                                         printk("%x", *m->bits);
 263                                 } else {
 264                                         i = hw_param_interval(params, r->var);
 265                                         if (i->empty)
 266                                                 printk("empty");
 267                                         else
 268                                                 printk("%c%u %u%c",
 269                                                        i->openmin ? '(' : '[', i->min,
 270                                                        i->max, i->openmax ? ')' : ']');
 271                                 }
 272                         }
 273 #endif
 274                         changed = r->func(params, r);
 275 #ifdef RULES_DEBUG
 276                         if (r->var >= 0) {
 277                                 printk(" -> ");
 278                                 if (hw_is_mask(r->var))
 279                                         printk("%x", *m->bits);
 280                                 else {
 281                                         if (i->empty)
 282                                                 printk("empty");
 283                                         else
 284                                                 printk("%c%u %u%c",
 285                                                        i->openmin ? '(' : '[', i->min,
 286                                                        i->max, i->openmax ? ')' : ']');
 287                                 }
 288                         }
 289                         printk("\n");
 290 #endif
 291                         rstamps[k] = stamp;
 292                         if (changed && r->var >= 0) {
 293                                 params->cmask |= (1 << r->var);
 294                                 vstamps[r->var] = stamp;
 295                                 again = 1;
 296                         }
 297                         if (changed < 0)
 298                                 return changed;
 299                         stamp++;
 300                 }
 301         } while (again);
 302         if (!params->msbits) {
 303                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
 304                 if (snd_interval_single(i))
 305                         params->msbits = snd_interval_value(i);
 306         }
 307
 308         if (!params->rate_den) {
 309                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 310                 if (snd_interval_single(i)) {
 311                         params->rate_num = snd_interval_value(i);
 312                         params->rate_den = 1;
 313                 }
 314         }
 315
 316         hw = &substream->runtime->hw;
 317         if (!params->info)
 318                 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
 319         if (!params->fifo_size) {
 320                 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 321                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 322                 if (snd_mask_min(m) == snd_mask_max(m) &&
 323                     snd_interval_min(i) == snd_interval_max(i)) {
 324                         changed = substream->ops->ioctl(substream,
 325                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
 326                         if (changed < 0)
 327                                 return changed;
 328                 }
 329         }
 330         params->rmask = 0;
 331         return 0;
 332 }
 333
 334 EXPORT_SYMBOL(snd_pcm_hw_refine);
 335
 336 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 337                                   struct snd_pcm_hw_params __user * _params)
 338 {
 339         struct snd_pcm_hw_params *params;
 340         int err;
 341
 342         params = memdup_user(_params, sizeof(*params));
 343         if (IS_ERR(params))
 344                 return PTR_ERR(params);
 345
 346         err = snd_pcm_hw_refine(substream, params);
 347         if (copy_to_user(_params, params, sizeof(*params))) {
 348                 if (!err)
 349                         err = -EFAULT;
 350         }
 351
 352         kfree(params);
 353         return err;
 354 }
 355
 356 static int period_to_usecs(struct snd_pcm_runtime *runtime)
 357 {
 358         int usecs;
 359
 360         if (! runtime->rate)
 361                 return -1; /* invalid */
 362
 363         /* take 75% of period time as the deadline */
 364         usecs = (750000 / runtime->rate) * runtime->period_size;
 365         usecs += ((750000 % runtime->rate) * runtime->period_size) /
 366                 runtime->rate;
 367
 368         return usecs;
 369 }
 370
 371 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 372                              struct snd_pcm_hw_params *params)
 373 {
 374         struct snd_pcm_runtime *runtime;
 375         int err, usecs;
 376         unsigned int bits;
 377         snd_pcm_uframes_t frames;
 378
 379         if (PCM_RUNTIME_CHECK(substream))
 380                 return -ENXIO;
 381         runtime = substream->runtime;
 382         snd_pcm_stream_lock_irq(substream);
 383         switch (runtime->status->state) {
 384         case SNDRV_PCM_STATE_OPEN:
 385         case SNDRV_PCM_STATE_SETUP:
 386         case SNDRV_PCM_STATE_PREPARED:
 387                 break;
 388         default:
 389                 snd_pcm_stream_unlock_irq(substream);
 390                 return -EBADFD;
 391         }
 392         snd_pcm_stream_unlock_irq(substream);
 393 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 394         if (!substream->oss.oss)
 395 #endif
 396                 if (atomic_read(&substream->mmap_count))
 397                         return -EBADFD;
 398
 399         params->rmask = ~0U;
 400         err = snd_pcm_hw_refine(substream, params);
 401         if (err < 0)
 402                 goto _error;
 403
 404         err = snd_pcm_hw_params_choose(substream, params);
 405         if (err < 0)
 406                 goto _error;
 407
 408         if (substream->ops->hw_params != NULL) {
 409                 err = substream->ops->hw_params(substream, params);
 410                 if (err < 0)
 411                         goto _error;
 412         }
 413
 414         runtime->access = params_access(params);
 415         runtime->format = params_format(params);
 416         runtime->subformat = params_subformat(params);
 417         runtime->channels = params_channels(params);
 418         runtime->rate = params_rate(params);
 419         runtime->period_size = params_period_size(params);
 420         runtime->periods = params_periods(params);
 421         runtime->buffer_size = params_buffer_size(params);
 422         runtime->info = params->info;
 423         runtime->rate_num = params->rate_num;
 424         runtime->rate_den = params->rate_den;
 425         runtime->no_period_wakeup =
 426                         (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
 427                         (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
 428
 429         bits = snd_pcm_format_physical_width(runtime->format);
 430         runtime->sample_bits = bits;
 431         bits *= runtime->channels;
 432         runtime->frame_bits = bits;
 433         frames = 1;
 434         while (bits % 8 != 0) {
 435                 bits *= 2;
 436                 frames *= 2;
 437         }
 438         runtime->byte_align = bits / 8;
 439         runtime->min_align = frames;
 440
 441         /* Default sw params */
 442         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 443         runtime->period_step = 1;
 444         runtime->control->avail_min = runtime->period_size;
 445         runtime->start_threshold = 1;
 446         runtime->stop_threshold = runtime->buffer_size;
 447         runtime->silence_threshold = 0;
 448         runtime->silence_size = 0;
 449         runtime->boundary = runtime->buffer_size;
 450         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 451                 runtime->boundary *= 2;
 452
 453         snd_pcm_timer_resolution_change(substream);
 454         runtime->status->state = SNDRV_PCM_STATE_SETUP;
 455
 456         if (pm_qos_request_active(&substream->latency_pm_qos_req))
 457                 pm_qos_remove_request(&substream->latency_pm_qos_req);
 458         if ((usecs = period_to_usecs(runtime)) >= 0)
 459                 pm_qos_add_request(&substream->latency_pm_qos_req,
 460                                    PM_QOS_CPU_DMA_LATENCY, usecs);
 461         return 0;
 462  _error:
 463         /* hardware might be unuseable from this time,
 464            so we force application to retry to set
 465            the correct hardware parameter settings */
 466         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 467         if (substream->ops->hw_free != NULL)
 468                 substream->ops->hw_free(substream);
 469         return err;
 470 }
 471
 472 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 473                                   struct snd_pcm_hw_params __user * _params)
 474 {
 475         struct snd_pcm_hw_params *params;
 476         int err;
 477
 478         params = memdup_user(_params, sizeof(*params));
 479         if (IS_ERR(params))
 480                 return PTR_ERR(params);
 481
 482         err = snd_pcm_hw_params(substream, params);
 483         if (copy_to_user(_params, params, sizeof(*params))) {
 484                 if (!err)
 485                         err = -EFAULT;
 486         }
 487
 488         kfree(params);
 489         return err;
 490 }
 491
 492 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 493 {
 494         struct snd_pcm_runtime *runtime;
 495         int result = 0;
 496
 497         if (PCM_RUNTIME_CHECK(substream))
 498                 return -ENXIO;
 499         runtime = substream->runtime;
 500         snd_pcm_stream_lock_irq(substream);
 501         switch (runtime->status->state) {
 502         case SNDRV_PCM_STATE_SETUP:
 503         case SNDRV_PCM_STATE_PREPARED:
 504                 break;
 505         default:
 506                 snd_pcm_stream_unlock_irq(substream);
 507                 return -EBADFD;
 508         }
 509         snd_pcm_stream_unlock_irq(substream);
 510         if (atomic_read(&substream->mmap_count))
 511                 return -EBADFD;
 512         if (substream->ops->hw_free)
 513                 result = substream->ops->hw_free(substream);
 514         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 515         pm_qos_remove_request(&substream->latency_pm_qos_req);
 516         return result;
 517 }
 518
 519 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 520                              struct snd_pcm_sw_params *params)
 521 {
 522         struct snd_pcm_runtime *runtime;
 523         int err;
 524
 525         if (PCM_RUNTIME_CHECK(substream))
 526                 return -ENXIO;
 527         runtime = substream->runtime;
 528         snd_pcm_stream_lock_irq(substream);
 529         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 530                 snd_pcm_stream_unlock_irq(substream);
 531                 return -EBADFD;
 532         }
 533         snd_pcm_stream_unlock_irq(substream);
 534
 535         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 536                 return -EINVAL;
 537         if (params->avail_min == 0)
 538                 return -EINVAL;
 539         if (params->silence_size >= runtime->boundary) {
 540                 if (params->silence_threshold != 0)
 541                         return -EINVAL;
 542         } else {
 543                 if (params->silence_size > params->silence_threshold)
 544                         return -EINVAL;
 545                 if (params->silence_threshold > runtime->buffer_size)
 546                         return -EINVAL;
 547         }
 548         err = 0;
 549         snd_pcm_stream_lock_irq(substream);
 550         runtime->tstamp_mode = params->tstamp_mode;
 551         runtime->period_step = params->period_step;
 552         runtime->control->avail_min = params->avail_min;
 553         runtime->start_threshold = params->start_threshold;
 554         runtime->stop_threshold = params->stop_threshold;
 555         runtime->silence_threshold = params->silence_threshold;
 556         runtime->silence_size = params->silence_size;
 557         params->boundary = runtime->boundary;
 558         if (snd_pcm_running(substream)) {
 559                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 560                     runtime->silence_size > 0)
 561                         snd_pcm_playback_silence(substream, ULONG_MAX);
 562                 err = snd_pcm_update_state(substream, runtime);
 563         }
 564         snd_pcm_stream_unlock_irq(substream);
 565         return err;
 566 }
 567
 568 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 569                                   struct snd_pcm_sw_params __user * _params)
 570 {
 571         struct snd_pcm_sw_params params;
 572         int err;
 573         if (copy_from_user(&params, _params, sizeof(params)))
 574                 return -EFAULT;
 575         err = snd_pcm_sw_params(substream, &params);
 576         if (copy_to_user(_params, &params, sizeof(params)))
 577                 return -EFAULT;
 578         return err;
 579 }
 580
 581 int snd_pcm_status(struct snd_pcm_substream *substream,
 582                    struct snd_pcm_status *status)
 583 {
 584         struct snd_pcm_runtime *runtime = substream->runtime;
 585
 586         snd_pcm_stream_lock_irq(substream);
 587         status->state = runtime->status->state;
 588         status->suspended_state = runtime->status->suspended_state;
 589         if (status->state == SNDRV_PCM_STATE_OPEN)
 590                 goto _end;
 591         status->trigger_tstamp = runtime->trigger_tstamp;
 592         if (snd_pcm_running(substream)) {
 593                 snd_pcm_update_hw_ptr(substream);
 594                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
 595                         status->tstamp = runtime->status->tstamp;
 596                         goto _tstamp_end;
 597                 }
 598         }
 599         snd_pcm_gettime(runtime, &status->tstamp);
 600  _tstamp_end:
 601         status->appl_ptr = runtime->control->appl_ptr;
 602         status->hw_ptr = runtime->status->hw_ptr;
 603         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 604                 status->avail = snd_pcm_playback_avail(runtime);
 605                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 606                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 607                         status->delay = runtime->buffer_size - status->avail;
 608                         status->delay += runtime->delay;
 609                 } else
 610                         status->delay = 0;
 611         } else {
 612                 status->avail = snd_pcm_capture_avail(runtime);
 613                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 614                         status->delay = status->avail + runtime->delay;
 615                 else
 616                         status->delay = 0;
 617         }
 618         status->avail_max = runtime->avail_max;
 619         status->overrange = runtime->overrange;
 620         runtime->avail_max = 0;
 621         runtime->overrange = 0;
 622  _end:
 623         snd_pcm_stream_unlock_irq(substream);
 624         return 0;
 625 }
 626
 627 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 628                                struct snd_pcm_status __user * _status)
 629 {
 630         struct snd_pcm_status status;
 631         int res;
 632
 633         memset(&status, 0, sizeof(status));
 634         res = snd_pcm_status(substream, &status);
 635         if (res < 0)
 636                 return res;
 637         if (copy_to_user(_status, &status, sizeof(status)))
 638                 return -EFAULT;
 639         return 0;
 640 }
 641
 642 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 643                                 struct snd_pcm_channel_info * info)
 644 {
 645         struct snd_pcm_runtime *runtime;
 646         unsigned int channel;
 647
 648         channel = info->channel;
 649         runtime = substream->runtime;
 650         snd_pcm_stream_lock_irq(substream);
 651         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 652                 snd_pcm_stream_unlock_irq(substream);
 653                 return -EBADFD;
 654         }
 655         snd_pcm_stream_unlock_irq(substream);
 656         if (channel >= runtime->channels)
 657                 return -EINVAL;
 658         memset(info, 0, sizeof(*info));
 659         info->channel = channel;
 660         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 661 }
 662
 663 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 664                                      struct snd_pcm_channel_info __user * _info)
 665 {
 666         struct snd_pcm_channel_info info;
 667         int res;
 668
 669         if (copy_from_user(&info, _info, sizeof(info)))
 670                 return -EFAULT;
 671         res = snd_pcm_channel_info(substream, &info);
 672         if (res < 0)
 673                 return res;
 674         if (copy_to_user(_info, &info, sizeof(info)))
 675                 return -EFAULT;
 676         return 0;
 677 }
 678
 679 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 680 {
 681         struct snd_pcm_runtime *runtime = substream->runtime;
 682         if (runtime->trigger_master == NULL)
 683                 return;
 684         if (runtime->trigger_master == substream) {
 685                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
 686         } else {
 687                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 688                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 689         }
 690         runtime->trigger_master = NULL;
 691 }
 692
 693 struct action_ops {
 694         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 695         int (*do_action)(struct snd_pcm_substream *substream, int state);
 696         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 697         void (*post_action)(struct snd_pcm_substream *substream, int state);
 698 };
 699
 700 /*
 701  *  this functions is core for handling of linked stream
 702  *  Note: the stream state might be changed also on failure
 703  *  Note2: call with calling stream lock + link lock
 704  */
 705 static int snd_pcm_action_group(struct action_ops *ops,
 706                                 struct snd_pcm_substream *substream,
 707                                 int state, int do_lock)
 708 {
 709         struct snd_pcm_substream *s = NULL;
 710         struct snd_pcm_substream *s1;
 711         int res = 0;
 712
 713         snd_pcm_group_for_each_entry(s, substream) {
 714                 if (do_lock && s != substream)
 715                         spin_lock_nested(&s->self_group.lock,
 716                                          SINGLE_DEPTH_NESTING);
 717                 res = ops->pre_action(s, state);
 718                 if (res < 0)
 719                         goto _unlock;
 720         }
 721         snd_pcm_group_for_each_entry(s, substream) {
 722                 res = ops->do_action(s, state);
 723                 if (res < 0) {
 724                         if (ops->undo_action) {
 725                                 snd_pcm_group_for_each_entry(s1, substream) {
 726                                         if (s1 == s) /* failed stream */
 727                                                 break;
 728                                         ops->undo_action(s1, state);
 729                                 }
 730                         }
 731                         s = NULL; /* unlock all */
 732                         goto _unlock;
 733                 }
 734         }
 735         snd_pcm_group_for_each_entry(s, substream) {
 736                 ops->post_action(s, state);
 737         }
 738  _unlock:
 739         if (do_lock) {
 740                 /* unlock streams */
 741                 snd_pcm_group_for_each_entry(s1, substream) {
 742                         if (s1 != substream)
 743                                 spin_unlock(&s1->self_group.lock);
 744                         if (s1 == s)    /* end */
 745                                 break;
 746                 }
 747         }
 748         return res;
 749 }
 750
 751 /*
 752  *  Note: call with stream lock
 753  */
 754 static int snd_pcm_action_single(struct action_ops *ops,
 755                                  struct snd_pcm_substream *substream,
 756                                  int state)
 757 {
 758         int res;
 759
 760         res = ops->pre_action(substream, state);
 761         if (res < 0)
 762                 return res;
 763         res = ops->do_action(substream, state);
 764         if (res == 0)
 765                 ops->post_action(substream, state);
 766         else if (ops->undo_action)
 767                 ops->undo_action(substream, state);
 768         return res;
 769 }
 770
 771 /*
 772  *  Note: call with stream lock
 773  */
 774 static int snd_pcm_action(struct action_ops *ops,
 775                           struct snd_pcm_substream *substream,
 776                           int state)
 777 {
 778         int res;
 779
 780         if (snd_pcm_stream_linked(substream)) {
 781                 if (!spin_trylock(&substream->group->lock)) {
 782                         spin_unlock(&substream->self_group.lock);
 783                         spin_lock(&substream->group->lock);
 784                         spin_lock(&substream->self_group.lock);
 785                 }
 786                 res = snd_pcm_action_group(ops, substream, state, 1);
 787                 spin_unlock(&substream->group->lock);
 788         } else {
 789                 res = snd_pcm_action_single(ops, substream, state);
 790         }
 791         return res;
 792 }
 793
 794 /*
 795  *  Note: don't use any locks before
 796  */
 797 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 798                                    struct snd_pcm_substream *substream,
 799                                    int state)
 800 {
 801         int res;
 802
 803         read_lock_irq(&snd_pcm_link_rwlock);
 804         if (snd_pcm_stream_linked(substream)) {
 805                 spin_lock(&substream->group->lock);
 806                 spin_lock(&substream->self_group.lock);
 807                 res = snd_pcm_action_group(ops, substream, state, 1);
 808                 spin_unlock(&substream->self_group.lock);
 809                 spin_unlock(&substream->group->lock);
 810         } else {
 811                 spin_lock(&substream->self_group.lock);
 812                 res = snd_pcm_action_single(ops, substream, state);
 813                 spin_unlock(&substream->self_group.lock);
 814         }
 815         read_unlock_irq(&snd_pcm_link_rwlock);
 816         return res;
 817 }
 818
 819 /*
 820  */
 821 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 822                                     struct snd_pcm_substream *substream,
 823                                     int state)
 824 {
 825         int res;
 826
 827         down_read(&snd_pcm_link_rwsem);
 828         if (snd_pcm_stream_linked(substream))
 829                 res = snd_pcm_action_group(ops, substream, state, 0);
 830         else
 831                 res = snd_pcm_action_single(ops, substream, state);
 832         up_read(&snd_pcm_link_rwsem);
 833         return res;
 834 }
 835
 836 /*
 837  * start callbacks
 838  */
 839 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 840 {
 841         struct snd_pcm_runtime *runtime = substream->runtime;
 842         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 843                 return -EBADFD;
 844         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 845             !snd_pcm_playback_data(substream))
 846                 return -EPIPE;
 847         runtime->trigger_master = substream;
 848         return 0;
 849 }
 850
 851 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 852 {
 853         if (substream->runtime->trigger_master != substream)
 854                 return 0;
 855         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
 856 }
 857
 858 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
 859 {
 860         if (substream->runtime->trigger_master == substream)
 861                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 862 }
 863
 864 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
 865 {
 866         struct snd_pcm_runtime *runtime = substream->runtime;
 867         snd_pcm_trigger_tstamp(substream);
 868         runtime->hw_ptr_jiffies = jiffies;
 869         runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
 870                                                             runtime->rate;
 871         runtime->status->state = state;
 872         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 873             runtime->silence_size > 0)
 874                 snd_pcm_playback_silence(substream, ULONG_MAX);
 875         if (substream->timer)
 876                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
 877                                  &runtime->trigger_tstamp);
 878 }
 879
 880 static struct action_ops snd_pcm_action_start = {
 881         .pre_action = snd_pcm_pre_start,
 882         .do_action = snd_pcm_do_start,
 883         .undo_action = snd_pcm_undo_start,
 884         .post_action = snd_pcm_post_start
 885 };
 886
 887 /**
 888  * snd_pcm_start - start all linked streams
 889  * @substream: the PCM substream instance
 890  */
 891 int snd_pcm_start(struct snd_pcm_substream *substream)
 892 {
 893         return snd_pcm_action(&snd_pcm_action_start, substream,
 894                               SNDRV_PCM_STATE_RUNNING);
 895 }
 896
 897 /*
 898  * stop callbacks
 899  */
 900 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
 901 {
 902         struct snd_pcm_runtime *runtime = substream->runtime;
 903         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 904                 return -EBADFD;
 905         runtime->trigger_master = substream;
 906         return 0;
 907 }
 908
 909 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
 910 {
 911         if (substream->runtime->trigger_master == substream &&
 912             snd_pcm_running(substream))
 913                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 914         return 0; /* unconditonally stop all substreams */
 915 }
 916
 917 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
 918 {
 919         struct snd_pcm_runtime *runtime = substream->runtime;
 920         if (runtime->status->state != state) {
 921                 snd_pcm_trigger_tstamp(substream);
 922                 if (substream->timer)
 923                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
 924                                          &runtime->trigger_tstamp);
 925                 runtime->status->state = state;
 926         }
 927         wake_up(&runtime->sleep);
 928         wake_up(&runtime->tsleep);
 929 }
 930
 931 static struct action_ops snd_pcm_action_stop = {
 932         .pre_action = snd_pcm_pre_stop,
 933         .do_action = snd_pcm_do_stop,
 934         .post_action = snd_pcm_post_stop
 935 };
 936
 937 /**
 938  * snd_pcm_stop - try to stop all running streams in the substream group
 939  * @substream: the PCM substream instance
 940  * @state: PCM state after stopping the stream
 941  *
 942  * The state of each stream is then changed to the given state unconditionally.
 943  */
 944 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
 945 {
 946         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
 947 }
 948
 949 EXPORT_SYMBOL(snd_pcm_stop);
 950
 951 /**
 952  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
 953  * @substream: the PCM substream
 954  *
 955  * After stopping, the state is changed to SETUP.
 956  * Unlike snd_pcm_stop(), this affects only the given stream.
 957  */
 958 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
 959 {
 960         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
 961                                      SNDRV_PCM_STATE_SETUP);
 962 }
 963
 964 /*
 965  * pause callbacks
 966  */
 967 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
 968 {
 969         struct snd_pcm_runtime *runtime = substream->runtime;
 970         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
 971                 return -ENOSYS;
 972         if (push) {
 973                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
 974                         return -EBADFD;
 975         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
 976                 return -EBADFD;
 977         runtime->trigger_master = substream;
 978         return 0;
 979 }
 980
 981 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
 982 {
 983         if (substream->runtime->trigger_master != substream)
 984                 return 0;
 985         /* some drivers might use hw_ptr to recover from the pause -
 986            update the hw_ptr now */
 987         if (push)
 988                 snd_pcm_update_hw_ptr(substream);
 989         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
 990          * a delta between the current jiffies, this gives a large enough
 991          * delta, effectively to skip the check once.
 992          */
 993         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
 994         return substream->ops->trigger(substream,
 995                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
 996                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
 997 }
 998
 999 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1000 {
1001         if (substream->runtime->trigger_master == substream)
1002                 substream->ops->trigger(substream,
1003                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1004                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1005 }
1006
1007 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1008 {
1009         struct snd_pcm_runtime *runtime = substream->runtime;
1010         snd_pcm_trigger_tstamp(substream);
1011         if (push) {
1012                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1013                 if (substream->timer)
1014                         snd_timer_notify(substream->timer,
1015                                          SNDRV_TIMER_EVENT_MPAUSE,
1016                                          &runtime->trigger_tstamp);
1017                 wake_up(&runtime->sleep);
1018                 wake_up(&runtime->tsleep);
1019         } else {
1020                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1021                 if (substream->timer)
1022                         snd_timer_notify(substream->timer,
1023                                          SNDRV_TIMER_EVENT_MCONTINUE,
1024                                          &runtime->trigger_tstamp);
1025         }
1026 }
1027
1028 static struct action_ops snd_pcm_action_pause = {
1029         .pre_action = snd_pcm_pre_pause,
1030         .do_action = snd_pcm_do_pause,
1031         .undo_action = snd_pcm_undo_pause,
1032         .post_action = snd_pcm_post_pause
1033 };
1034
1035 /*
1036  * Push/release the pause for all linked streams.
1037  */
1038 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1039 {
1040         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1041 }
1042
1043 #ifdef CONFIG_PM
1044 /* suspend */
1045
1046 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1047 {
1048         struct snd_pcm_runtime *runtime = substream->runtime;
1049         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1050                 return -EBUSY;
1051         runtime->trigger_master = substream;
1052         return 0;
1053 }
1054
1055 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1056 {
1057         struct snd_pcm_runtime *runtime = substream->runtime;
1058         if (runtime->trigger_master != substream)
1059                 return 0;
1060         if (! snd_pcm_running(substream))
1061                 return 0;
1062         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1063         return 0; /* suspend unconditionally */
1064 }
1065
1066 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1067 {
1068         struct snd_pcm_runtime *runtime = substream->runtime;
1069         snd_pcm_trigger_tstamp(substream);
1070         if (substream->timer)
1071                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1072                                  &runtime->trigger_tstamp);
1073         runtime->status->suspended_state = runtime->status->state;
1074         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1075         wake_up(&runtime->sleep);
1076         wake_up(&runtime->tsleep);
1077 }
1078
1079 static struct action_ops snd_pcm_action_suspend = {
1080         .pre_action = snd_pcm_pre_suspend,
1081         .do_action = snd_pcm_do_suspend,
1082         .post_action = snd_pcm_post_suspend
1083 };
1084
1085 /**
1086  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1087  * @substream: the PCM substream
1088  *
1089  * After this call, all streams are changed to SUSPENDED state.
1090  */
1091 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1092 {
1093         int err;
1094         unsigned long flags;
1095
1096         if (! substream)
1097                 return 0;
1098
1099         snd_pcm_stream_lock_irqsave(substream, flags);
1100         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1101         snd_pcm_stream_unlock_irqrestore(substream, flags);
1102         return err;
1103 }
1104
1105 EXPORT_SYMBOL(snd_pcm_suspend);
1106
1107 /**
1108  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1109  * @pcm: the PCM instance
1110  *
1111  * After this call, all streams are changed to SUSPENDED state.
1112  */
1113 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1114 {
1115         struct snd_pcm_substream *substream;
1116         int stream, err = 0;
1117
1118         if (! pcm)
1119                 return 0;
1120
1121         for (stream = 0; stream < 2; stream++) {
1122                 for (substream = pcm->streams[stream].substream;
1123                      substream; substream = substream->next) {
1124                         /* FIXME: the open/close code should lock this as well */
1125                         if (substream->runtime == NULL)
1126                                 continue;
1127                         err = snd_pcm_suspend(substream);
1128                         if (err < 0 && err != -EBUSY)
1129                                 return err;
1130                 }
1131         }
1132         return 0;
1133 }
1134
1135 EXPORT_SYMBOL(snd_pcm_suspend_all);
1136
1137 /* resume */
1138
1139 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1140 {
1141         struct snd_pcm_runtime *runtime = substream->runtime;
1142         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1143                 return -ENOSYS;
1144         runtime->trigger_master = substream;
1145         return 0;
1146 }
1147
1148 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1149 {
1150         struct snd_pcm_runtime *runtime = substream->runtime;
1151         if (runtime->trigger_master != substream)
1152                 return 0;
1153         /* DMA not running previously? */
1154         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1155             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1156              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1157                 return 0;
1158         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1159 }
1160
1161 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1162 {
1163         if (substream->runtime->trigger_master == substream &&
1164             snd_pcm_running(substream))
1165                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1166 }
1167
1168 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1169 {
1170         struct snd_pcm_runtime *runtime = substream->runtime;
1171         snd_pcm_trigger_tstamp(substream);
1172         if (substream->timer)
1173                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1174                                  &runtime->trigger_tstamp);
1175         runtime->status->state = runtime->status->suspended_state;
1176 }
1177
1178 static struct action_ops snd_pcm_action_resume = {
1179         .pre_action = snd_pcm_pre_resume,
1180         .do_action = snd_pcm_do_resume,
1181         .undo_action = snd_pcm_undo_resume,
1182         .post_action = snd_pcm_post_resume
1183 };
1184
1185 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1186 {
1187         struct snd_card *card = substream->pcm->card;
1188         int res;
1189
1190         snd_power_lock(card);
1191         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1192                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1193         snd_power_unlock(card);
1194         return res;
1195 }
1196
1197 #else
1198
1199 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1200 {
1201         return -ENOSYS;
1202 }
1203
1204 #endif /* CONFIG_PM */
1205
1206 /*
1207  * xrun ioctl
1208  *
1209  * Change the RUNNING stream(s) to XRUN state.
1210  */
1211 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1212 {
1213         struct snd_card *card = substream->pcm->card;
1214         struct snd_pcm_runtime *runtime = substream->runtime;
1215         int result;
1216
1217         snd_power_lock(card);
1218         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1219                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1220                 if (result < 0)
1221                         goto _unlock;
1222         }
1223
1224         snd_pcm_stream_lock_irq(substream);
1225         switch (runtime->status->state) {
1226         case SNDRV_PCM_STATE_XRUN:
1227                 result = 0;     /* already there */
1228                 break;
1229         case SNDRV_PCM_STATE_RUNNING:
1230                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1231                 break;
1232         default:
1233                 result = -EBADFD;
1234         }
1235         snd_pcm_stream_unlock_irq(substream);
1236  _unlock:
1237         snd_power_unlock(card);
1238         return result;
1239 }
1240
1241 /*
1242  * reset ioctl
1243  */
1244 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1245 {
1246         struct snd_pcm_runtime *runtime = substream->runtime;
1247         switch (runtime->status->state) {
1248         case SNDRV_PCM_STATE_RUNNING:
1249         case SNDRV_PCM_STATE_PREPARED:
1250         case SNDRV_PCM_STATE_PAUSED:
1251         case SNDRV_PCM_STATE_SUSPENDED:
1252                 return 0;
1253         default:
1254                 return -EBADFD;
1255         }
1256 }
1257
1258 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1259 {
1260         struct snd_pcm_runtime *runtime = substream->runtime;
1261         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1262         if (err < 0)
1263                 return err;
1264         runtime->hw_ptr_base = 0;
1265         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1266                 runtime->status->hw_ptr % runtime->period_size;
1267         runtime->silence_start = runtime->status->hw_ptr;
1268         runtime->silence_filled = 0;
1269         return 0;
1270 }
1271
1272 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1273 {
1274         struct snd_pcm_runtime *runtime = substream->runtime;
1275         runtime->control->appl_ptr = runtime->status->hw_ptr;
1276         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1277             runtime->silence_size > 0)
1278                 snd_pcm_playback_silence(substream, ULONG_MAX);
1279 }
1280
1281 static struct action_ops snd_pcm_action_reset = {
1282         .pre_action = snd_pcm_pre_reset,
1283         .do_action = snd_pcm_do_reset,
1284         .post_action = snd_pcm_post_reset
1285 };
1286
1287 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1288 {
1289         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1290 }
1291
1292 /*
1293  * prepare ioctl
1294  */
1295 /* we use the second argument for updating f_flags */
1296 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1297                                int f_flags)
1298 {
1299         struct snd_pcm_runtime *runtime = substream->runtime;
1300         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1301             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1302                 return -EBADFD;
1303         if (snd_pcm_running(substream))
1304                 return -EBUSY;
1305         substream->f_flags = f_flags;
1306         return 0;
1307 }
1308
1309 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1310 {
1311         int err;
1312         err = substream->ops->prepare(substream);
1313         if (err < 0)
1314                 return err;
1315         return snd_pcm_do_reset(substream, 0);
1316 }
1317
1318 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1319 {
1320         struct snd_pcm_runtime *runtime = substream->runtime;
1321         runtime->control->appl_ptr = runtime->status->hw_ptr;
1322         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1323 }
1324
1325 static struct action_ops snd_pcm_action_prepare = {
1326         .pre_action = snd_pcm_pre_prepare,
1327         .do_action = snd_pcm_do_prepare,
1328         .post_action = snd_pcm_post_prepare
1329 };
1330
1331 /**
1332  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1333  * @substream: the PCM substream instance
1334  * @file: file to refer f_flags
1335  */
1336 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1337                            struct file *file)
1338 {
1339         int res;
1340         struct snd_card *card = substream->pcm->card;
1341         int f_flags;
1342
1343         if (file)
1344                 f_flags = file->f_flags;
1345         else
1346                 f_flags = substream->f_flags;
1347
1348         snd_power_lock(card);
1349         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1350                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1351                                                substream, f_flags);
1352         snd_power_unlock(card);
1353         return res;
1354 }
1355
1356 /*
1357  * drain ioctl
1358  */
1359
1360 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1361 {
1362         substream->runtime->trigger_master = substream;
1363         return 0;
1364 }
1365
1366 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1367 {
1368         struct snd_pcm_runtime *runtime = substream->runtime;
1369         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1370                 switch (runtime->status->state) {
1371                 case SNDRV_PCM_STATE_PREPARED:
1372                         /* start playback stream if possible */
1373                         if (! snd_pcm_playback_empty(substream)) {
1374                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1375                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1376                         }
1377                         break;
1378                 case SNDRV_PCM_STATE_RUNNING:
1379                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1380                         break;
1381                 default:
1382                         break;
1383                 }
1384         } else {
1385                 /* stop running stream */
1386                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1387                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1388                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1389                         snd_pcm_do_stop(substream, new_state);
1390                         snd_pcm_post_stop(substream, new_state);
1391                 }
1392         }
1393         return 0;
1394 }
1395
1396 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1397 {
1398 }
1399
1400 static struct action_ops snd_pcm_action_drain_init = {
1401         .pre_action = snd_pcm_pre_drain_init,
1402         .do_action = snd_pcm_do_drain_init,
1403         .post_action = snd_pcm_post_drain_init
1404 };
1405
1406 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1407
1408 /*
1409  * Drain the stream(s).
1410  * When the substream is linked, sync until the draining of all playback streams
1411  * is finished.
1412  * After this call, all streams are supposed to be either SETUP or DRAINING
1413  * (capture only) state.
1414  */
1415 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1416                          struct file *file)
1417 {
1418         struct snd_card *card;
1419         struct snd_pcm_runtime *runtime;
1420         struct snd_pcm_substream *s;
1421         wait_queue_t wait;
1422         int result = 0;
1423         int nonblock = 0;
1424
1425         card = substream->pcm->card;
1426         runtime = substream->runtime;
1427
1428         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1429                 return -EBADFD;
1430
1431         snd_power_lock(card);
1432         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1433                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1434                 if (result < 0) {
1435                         snd_power_unlock(card);
1436                         return result;
1437                 }
1438         }
1439
1440         if (file) {
1441                 if (file->f_flags & O_NONBLOCK)
1442                         nonblock = 1;
1443         } else if (substream->f_flags & O_NONBLOCK)
1444                 nonblock = 1;
1445
1446         down_read(&snd_pcm_link_rwsem);
1447         snd_pcm_stream_lock_irq(substream);
1448         /* resume pause */
1449         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1450                 snd_pcm_pause(substream, 0);
1451
1452         /* pre-start/stop - all running streams are changed to DRAINING state */
1453         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1454         if (result < 0)
1455                 goto unlock;
1456         /* in non-blocking, we don't wait in ioctl but let caller poll */
1457         if (nonblock) {
1458                 result = -EAGAIN;
1459                 goto unlock;
1460         }
1461
1462         for (;;) {
1463                 long tout;
1464                 struct snd_pcm_runtime *to_check;
1465                 if (signal_pending(current)) {
1466                         result = -ERESTARTSYS;
1467                         break;
1468                 }
1469                 /* find a substream to drain */
1470                 to_check = NULL;
1471                 snd_pcm_group_for_each_entry(s, substream) {
1472                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1473                                 continue;
1474                         runtime = s->runtime;
1475                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1476                                 to_check = runtime;
1477                                 break;
1478                         }
1479                 }
1480                 if (!to_check)
1481                         break; /* all drained */
1482                 init_waitqueue_entry(&wait, current);
1483                 add_wait_queue(&to_check->sleep, &wait);
1484                 set_current_state(TASK_INTERRUPTIBLE);
1485                 snd_pcm_stream_unlock_irq(substream);
1486                 up_read(&snd_pcm_link_rwsem);
1487                 snd_power_unlock(card);
1488                 tout = schedule_timeout(10 * HZ);
1489                 snd_power_lock(card);
1490                 down_read(&snd_pcm_link_rwsem);
1491                 snd_pcm_stream_lock_irq(substream);
1492                 remove_wait_queue(&to_check->sleep, &wait);
1493                 if (tout == 0) {
1494                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1495                                 result = -ESTRPIPE;
1496                         else {
1497                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1498                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1499                                 result = -EIO;
1500                         }
1501                         break;
1502                 }
1503         }
1504
1505  unlock:
1506         snd_pcm_stream_unlock_irq(substream);
1507         up_read(&snd_pcm_link_rwsem);
1508         snd_power_unlock(card);
1509
1510         return result;
1511 }
1512
1513 /*
1514  * drop ioctl
1515  *
1516  * Immediately put all linked substreams into SETUP state.
1517  */
1518 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1519 {
1520         struct snd_pcm_runtime *runtime;
1521         struct snd_card *card;
1522         int result = 0;
1523
1524         if (PCM_RUNTIME_CHECK(substream))
1525                 return -ENXIO;
1526         runtime = substream->runtime;
1527         card = substream->pcm->card;
1528
1529         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1530             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1531             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1532                 return -EBADFD;
1533
1534         snd_pcm_stream_lock_irq(substream);
1535         /* resume pause */
1536         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1537                 snd_pcm_pause(substream, 0);
1538
1539         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1540         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1541         snd_pcm_stream_unlock_irq(substream);
1542
1543         return result;
1544 }
1545
1546
1547 /* WARNING: Don't forget to fput back the file */
1548 static struct file *snd_pcm_file_fd(int fd)
1549 {
1550         struct file *file;
1551         struct inode *inode;
1552         unsigned int minor;
1553
1554         file = fget(fd);
1555         if (!file)
1556                 return NULL;
1557         inode = file->f_path.dentry->d_inode;
1558         if (!S_ISCHR(inode->i_mode) ||
1559             imajor(inode) != snd_major) {
1560                 fput(file);
1561                 return NULL;
1562         }
1563         minor = iminor(inode);
1564         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1565             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1566                 fput(file);
1567                 return NULL;
1568         }
1569         return file;
1570 }
1571
1572 /*
1573  * PCM link handling
1574  */
1575 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1576 {
1577         int res = 0;
1578         struct file *file;
1579         struct snd_pcm_file *pcm_file;
1580         struct snd_pcm_substream *substream1;
1581
1582         file = snd_pcm_file_fd(fd);
1583         if (!file)
1584                 return -EBADFD;
1585         pcm_file = file->private_data;
1586         substream1 = pcm_file->substream;
1587         down_write(&snd_pcm_link_rwsem);
1588         write_lock_irq(&snd_pcm_link_rwlock);
1589         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1590             substream->runtime->status->state != substream1->runtime->status->state) {
1591                 res = -EBADFD;
1592                 goto _end;
1593         }
1594         if (snd_pcm_stream_linked(substream1)) {
1595                 res = -EALREADY;
1596                 goto _end;
1597         }
1598         if (!snd_pcm_stream_linked(substream)) {
1599                 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1600                 if (substream->group == NULL) {
1601                         res = -ENOMEM;
1602                         goto _end;
1603                 }
1604                 spin_lock_init(&substream->group->lock);
1605                 INIT_LIST_HEAD(&substream->group->substreams);
1606                 list_add_tail(&substream->link_list, &substream->group->substreams);
1607                 substream->group->count = 1;
1608         }
1609         list_add_tail(&substream1->link_list, &substream->group->substreams);
1610         substream->group->count++;
1611         substream1->group = substream->group;
1612  _end:
1613         write_unlock_irq(&snd_pcm_link_rwlock);
1614         up_write(&snd_pcm_link_rwsem);
1615         fput(file);
1616         return res;
1617 }
1618
1619 static void relink_to_local(struct snd_pcm_substream *substream)
1620 {
1621         substream->group = &substream->self_group;
1622         INIT_LIST_HEAD(&substream->self_group.substreams);
1623         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1624 }
1625
1626 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1627 {
1628         struct snd_pcm_substream *s;
1629         int res = 0;
1630
1631         down_write(&snd_pcm_link_rwsem);
1632         write_lock_irq(&snd_pcm_link_rwlock);
1633         if (!snd_pcm_stream_linked(substream)) {
1634                 res = -EALREADY;
1635                 goto _end;
1636         }
1637         list_del(&substream->link_list);
1638         substream->group->count--;
1639         if (substream->group->count == 1) {     /* detach the last stream, too */
1640                 snd_pcm_group_for_each_entry(s, substream) {
1641                         relink_to_local(s);
1642                         break;
1643                 }
1644                 kfree(substream->group);
1645         }
1646         relink_to_local(substream);
1647        _end:
1648         write_unlock_irq(&snd_pcm_link_rwlock);
1649         up_write(&snd_pcm_link_rwsem);
1650         return res;
1651 }
1652
1653 /*
1654  * hw configurator
1655  */
1656 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1657                                struct snd_pcm_hw_rule *rule)
1658 {
1659         struct snd_interval t;
1660         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1661                      hw_param_interval_c(params, rule->deps[1]), &t);
1662         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1663 }
1664
1665 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1666                                struct snd_pcm_hw_rule *rule)
1667 {
1668         struct snd_interval t;
1669         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1670                      hw_param_interval_c(params, rule->deps[1]), &t);
1671         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1672 }
1673
1674 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1675                                    struct snd_pcm_hw_rule *rule)
1676 {
1677         struct snd_interval t;
1678         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1679                          hw_param_interval_c(params, rule->deps[1]),
1680                          (unsigned long) rule->private, &t);
1681         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1682 }
1683
1684 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1685                                    struct snd_pcm_hw_rule *rule)
1686 {
1687         struct snd_interval t;
1688         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1689                          (unsigned long) rule->private,
1690                          hw_param_interval_c(params, rule->deps[1]), &t);
1691         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1692 }
1693
1694 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1695                                   struct snd_pcm_hw_rule *rule)
1696 {
1697         unsigned int k;
1698         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1699         struct snd_mask m;
1700         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1701         snd_mask_any(&m);
1702         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1703                 int bits;
1704                 if (! snd_mask_test(mask, k))
1705                         continue;
1706                 bits = snd_pcm_format_physical_width(k);
1707                 if (bits <= 0)
1708                         continue; /* ignore invalid formats */
1709                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1710                         snd_mask_reset(&m, k);
1711         }
1712         return snd_mask_refine(mask, &m);
1713 }
1714
1715 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1716                                        struct snd_pcm_hw_rule *rule)
1717 {
1718         struct snd_interval t;
1719         unsigned int k;
1720         t.min = UINT_MAX;
1721         t.max = 0;
1722         t.openmin = 0;
1723         t.openmax = 0;
1724         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1725                 int bits;
1726                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1727                         continue;
1728                 bits = snd_pcm_format_physical_width(k);
1729                 if (bits <= 0)
1730                         continue; /* ignore invalid formats */
1731                 if (t.min > (unsigned)bits)
1732                         t.min = bits;
1733                 if (t.max < (unsigned)bits)
1734                         t.max = bits;
1735         }
1736         t.integer = 1;
1737         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1738 }
1739
1740 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1741 #error "Change this table"
1742 #endif
1743
1744 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1745                                  48000, 64000, 88200, 96000, 176400, 192000 };
1746
1747 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1748         .count = ARRAY_SIZE(rates),
1749         .list = rates,
1750 };
1751
1752 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1753                                 struct snd_pcm_hw_rule *rule)
1754 {
1755         struct snd_pcm_hardware *hw = rule->private;
1756         return snd_interval_list(hw_param_interval(params, rule->var),
1757                                  snd_pcm_known_rates.count,
1758                                  snd_pcm_known_rates.list, hw->rates);
1759 }
1760
1761 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1762                                             struct snd_pcm_hw_rule *rule)
1763 {
1764         struct snd_interval t;
1765         struct snd_pcm_substream *substream = rule->private;
1766         t.min = 0;
1767         t.max = substream->buffer_bytes_max;
1768         t.openmin = 0;
1769         t.openmax = 0;
1770         t.integer = 1;
1771         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1772 }
1773
1774 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1775 {
1776         struct snd_pcm_runtime *runtime = substream->runtime;
1777         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1778         int k, err;
1779
1780         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1781                 snd_mask_any(constrs_mask(constrs, k));
1782         }
1783
1784         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1785                 snd_interval_any(constrs_interval(constrs, k));
1786         }
1787
1788         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1789         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1790         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1791         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1792         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1793
1794         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1795                                    snd_pcm_hw_rule_format, NULL,
1796                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1797         if (err < 0)
1798                 return err;
1799         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1800                                   snd_pcm_hw_rule_sample_bits, NULL,
1801                                   SNDRV_PCM_HW_PARAM_FORMAT,
1802                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1803         if (err < 0)
1804                 return err;
1805         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1806                                   snd_pcm_hw_rule_div, NULL,
1807                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1808         if (err < 0)
1809                 return err;
1810         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1811                                   snd_pcm_hw_rule_mul, NULL,
1812                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1813         if (err < 0)
1814                 return err;
1815         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1816                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1817                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1818         if (err < 0)
1819                 return err;
1820         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1821                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1822                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1823         if (err < 0)
1824                 return err;
1825         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1826                                   snd_pcm_hw_rule_div, NULL,
1827                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1828         if (err < 0)
1829                 return err;
1830         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1831                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1832                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1833         if (err < 0)
1834                 return err;
1835         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1836                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1837                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1838         if (err < 0)
1839                 return err;
1840         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1841                                   snd_pcm_hw_rule_div, NULL,
1842                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1843         if (err < 0)
1844                 return err;
1845         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1846                                   snd_pcm_hw_rule_div, NULL,
1847                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1848         if (err < 0)
1849                 return err;
1850         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1851                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1852                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1853         if (err < 0)
1854                 return err;
1855         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1856                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1857                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1858         if (err < 0)
1859                 return err;
1860         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1861                                   snd_pcm_hw_rule_mul, NULL,
1862                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1863         if (err < 0)
1864                 return err;
1865         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1866                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1867                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1868         if (err < 0)
1869                 return err;
1870         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1871                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1872                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1873         if (err < 0)
1874                 return err;
1875         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1876                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1877                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1878         if (err < 0)
1879                 return err;
1880         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1881                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1882                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1883         if (err < 0)
1884                 return err;
1885         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1886                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1887                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1888         if (err < 0)
1889                 return err;
1890         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1891                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1892                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1893         if (err < 0)
1894                 return err;
1895         return 0;
1896 }
1897
1898 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1899 {
1900         struct snd_pcm_runtime *runtime = substream->runtime;
1901         struct snd_pcm_hardware *hw = &runtime->hw;
1902         int err;
1903         unsigned int mask = 0;
1904
1905         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1906                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1907         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1908                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1909         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1910                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1911                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1912                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1913                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1914                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1915                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1916         }
1917         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1918         if (err < 0)
1919                 return err;
1920
1921         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1922         if (err < 0)
1923                 return err;
1924
1925         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1926         if (err < 0)
1927                 return err;
1928
1929         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1930                                            hw->channels_min, hw->channels_max);
1931         if (err < 0)
1932                 return err;
1933
1934         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1935                                            hw->rate_min, hw->rate_max);
1936         if (err < 0)
1937                 return err;
1938
1939         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1940                                            hw->period_bytes_min, hw->period_bytes_max);
1941         if (err < 0)
1942                 return err;
1943
1944         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1945                                            hw->periods_min, hw->periods_max);
1946         if (err < 0)
1947                 return err;
1948
1949         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1950                                            hw->period_bytes_min, hw->buffer_bytes_max);
1951         if (err < 0)
1952                 return err;
1953
1954         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1955                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1956                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1957         if (err < 0)
1958                 return err;
1959
1960         /* FIXME: remove */
1961         if (runtime->dma_bytes) {
1962                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1963                 if (err < 0)
1964                         return -EINVAL;
1965         }
1966
1967         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1968                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1969                                           snd_pcm_hw_rule_rate, hw,
1970                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1971                 if (err < 0)
1972                         return err;
1973         }
1974
1975         /* FIXME: this belong to lowlevel */
1976         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1977
1978         return 0;
1979 }
1980
1981 static void pcm_release_private(struct snd_pcm_substream *substream)
1982 {
1983         snd_pcm_unlink(substream);
1984 }
1985
1986 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1987 {
1988         substream->ref_count--;
1989         if (substream->ref_count > 0)
1990                 return;
1991
1992         snd_pcm_drop(substream);
1993         if (substream->hw_opened) {
1994                 if (substream->ops->hw_free != NULL)
1995                         substream->ops->hw_free(substream);
1996                 substream->ops->close(substream);
1997                 substream->hw_opened = 0;
1998         }
1999         if (pm_qos_request_active(&substream->latency_pm_qos_req))
2000                 pm_qos_remove_request(&substream->latency_pm_qos_req);
2001         if (substream->pcm_release) {
2002                 substream->pcm_release(substream);
2003                 substream->pcm_release = NULL;
2004         }
2005         snd_pcm_detach_substream(substream);
2006 }
2007
2008 EXPORT_SYMBOL(snd_pcm_release_substream);
2009
2010 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2011                            struct file *file,
2012                            struct snd_pcm_substream **rsubstream)
2013 {
2014         struct snd_pcm_substream *substream;
2015         int err;
2016
2017         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2018         if (err < 0)
2019                 return err;
2020         if (substream->ref_count > 1) {
2021                 *rsubstream = substream;
2022                 return 0;
2023         }
2024
2025         err = snd_pcm_hw_constraints_init(substream);
2026         if (err < 0) {
2027                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2028                 goto error;
2029         }
2030
2031         if ((err = substream->ops->open(substream)) < 0)
2032                 goto error;
2033
2034         substream->hw_opened = 1;
2035
2036         err = snd_pcm_hw_constraints_complete(substream);
2037         if (err < 0) {
2038                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2039                 goto error;
2040         }
2041
2042         *rsubstream = substream;
2043         return 0;
2044
2045  error:
2046         snd_pcm_release_substream(substream);
2047         return err;
2048 }
2049
2050 EXPORT_SYMBOL(snd_pcm_open_substream);
2051
2052 static int snd_pcm_open_file(struct file *file,
2053                              struct snd_pcm *pcm,
2054                              int stream,
2055                              struct snd_pcm_file **rpcm_file)
2056 {
2057         struct snd_pcm_file *pcm_file;
2058         struct snd_pcm_substream *substream;
2059         struct snd_pcm_str *str;
2060         int err;
2061
2062         if (rpcm_file)
2063                 *rpcm_file = NULL;
2064
2065         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2066         if (err < 0)
2067                 return err;
2068
2069         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2070         if (pcm_file == NULL) {
2071                 snd_pcm_release_substream(substream);
2072                 return -ENOMEM;
2073         }
2074         pcm_file->substream = substream;
2075         if (substream->ref_count == 1) {
2076                 str = substream->pstr;
2077                 substream->file = pcm_file;
2078                 substream->pcm_release = pcm_release_private;
2079         }
2080         file->private_data = pcm_file;
2081         if (rpcm_file)
2082                 *rpcm_file = pcm_file;
2083         return 0;
2084 }
2085
2086 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2087 {
2088         struct snd_pcm *pcm;
2089         int err = nonseekable_open(inode, file);
2090         if (err < 0)
2091                 return err;
2092         pcm = snd_lookup_minor_data(iminor(inode),
2093                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2094         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2095 }
2096
2097 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2098 {
2099         struct snd_pcm *pcm;
2100         int err = nonseekable_open(inode, file);
2101         if (err < 0)
2102                 return err;
2103         pcm = snd_lookup_minor_data(iminor(inode),
2104                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2105         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2106 }
2107
2108 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2109 {
2110         int err;
2111         struct snd_pcm_file *pcm_file;
2112         wait_queue_t wait;
2113
2114         if (pcm == NULL) {
2115                 err = -ENODEV;
2116                 goto __error1;
2117         }
2118         err = snd_card_file_add(pcm->card, file);
2119         if (err < 0)
2120                 goto __error1;
2121         if (!try_module_get(pcm->card->module)) {
2122                 err = -EFAULT;
2123                 goto __error2;
2124         }
2125         init_waitqueue_entry(&wait, current);
2126         add_wait_queue(&pcm->open_wait, &wait);
2127         mutex_lock(&pcm->open_mutex);
2128         while (1) {
2129                 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2130                 if (err >= 0)
2131                         break;
2132                 if (err == -EAGAIN) {
2133                         if (file->f_flags & O_NONBLOCK) {
2134                                 err = -EBUSY;
2135                                 break;
2136                         }
2137                 } else
2138                         break;
2139                 set_current_state(TASK_INTERRUPTIBLE);
2140                 mutex_unlock(&pcm->open_mutex);
2141                 schedule();
2142                 mutex_lock(&pcm->open_mutex);
2143                 if (signal_pending(current)) {
2144                         err = -ERESTARTSYS;
2145                         break;
2146                 }
2147         }
2148         remove_wait_queue(&pcm->open_wait, &wait);
2149         mutex_unlock(&pcm->open_mutex);
2150         if (err < 0)
2151                 goto __error;
2152         return err;
2153
2154       __error:
2155         module_put(pcm->card->module);
2156       __error2:
2157         snd_card_file_remove(pcm->card, file);
2158       __error1:
2159         return err;
2160 }
2161
2162 static int snd_pcm_release(struct inode *inode, struct file *file)
2163 {
2164         struct snd_pcm *pcm;
2165         struct snd_pcm_substream *substream;
2166         struct snd_pcm_file *pcm_file;
2167
2168         pcm_file = file->private_data;
2169         substream = pcm_file->substream;
2170         if (snd_BUG_ON(!substream))
2171                 return -ENXIO;
2172         pcm = substream->pcm;
2173         mutex_lock(&pcm->open_mutex);
2174         snd_pcm_release_substream(substream);
2175         kfree(pcm_file);
2176         mutex_unlock(&pcm->open_mutex);
2177         wake_up(&pcm->open_wait);
2178         module_put(pcm->card->module);
2179         snd_card_file_remove(pcm->card, file);
2180         return 0;
2181 }
2182
2183 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2184                                                  snd_pcm_uframes_t frames)
2185 {
2186         struct snd_pcm_runtime *runtime = substream->runtime;
2187         snd_pcm_sframes_t appl_ptr;
2188         snd_pcm_sframes_t ret;
2189         snd_pcm_sframes_t hw_avail;
2190
2191         if (frames == 0)
2192                 return 0;
2193
2194         snd_pcm_stream_lock_irq(substream);
2195         switch (runtime->status->state) {
2196         case SNDRV_PCM_STATE_PREPARED:
2197                 break;
2198         case SNDRV_PCM_STATE_DRAINING:
2199         case SNDRV_PCM_STATE_RUNNING:
2200                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2201                         break;
2202                 /* Fall through */
2203         case SNDRV_PCM_STATE_XRUN:
2204                 ret = -EPIPE;
2205                 goto __end;
2206         case SNDRV_PCM_STATE_SUSPENDED:
2207                 ret = -ESTRPIPE;
2208                 goto __end;
2209         default:
2210                 ret = -EBADFD;
2211                 goto __end;
2212         }
2213
2214         hw_avail = snd_pcm_playback_hw_avail(runtime);
2215         if (hw_avail <= 0) {
2216                 ret = 0;
2217                 goto __end;
2218         }
2219         if (frames > (snd_pcm_uframes_t)hw_avail)
2220                 frames = hw_avail;
2221         appl_ptr = runtime->control->appl_ptr - frames;
2222         if (appl_ptr < 0)
2223                 appl_ptr += runtime->boundary;
2224         runtime->control->appl_ptr = appl_ptr;
2225         ret = frames;
2226  __end:
2227         snd_pcm_stream_unlock_irq(substream);
2228         return ret;
2229 }
2230
2231 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2232                                                 snd_pcm_uframes_t frames)
2233 {
2234         struct snd_pcm_runtime *runtime = substream->runtime;
2235         snd_pcm_sframes_t appl_ptr;
2236         snd_pcm_sframes_t ret;
2237         snd_pcm_sframes_t hw_avail;
2238
2239         if (frames == 0)
2240                 return 0;
2241
2242         snd_pcm_stream_lock_irq(substream);
2243         switch (runtime->status->state) {
2244         case SNDRV_PCM_STATE_PREPARED:
2245         case SNDRV_PCM_STATE_DRAINING:
2246                 break;
2247         case SNDRV_PCM_STATE_RUNNING:
2248                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2249                         break;
2250                 /* Fall through */
2251         case SNDRV_PCM_STATE_XRUN:
2252                 ret = -EPIPE;
2253                 goto __end;
2254         case SNDRV_PCM_STATE_SUSPENDED:
2255                 ret = -ESTRPIPE;
2256                 goto __end;
2257         default:
2258                 ret = -EBADFD;
2259                 goto __end;
2260         }
2261
2262         hw_avail = snd_pcm_capture_hw_avail(runtime);
2263         if (hw_avail <= 0) {
2264                 ret = 0;
2265                 goto __end;
2266         }
2267         if (frames > (snd_pcm_uframes_t)hw_avail)
2268                 frames = hw_avail;
2269         appl_ptr = runtime->control->appl_ptr - frames;
2270         if (appl_ptr < 0)
2271                 appl_ptr += runtime->boundary;
2272         runtime->control->appl_ptr = appl_ptr;
2273         ret = frames;
2274  __end:
2275         snd_pcm_stream_unlock_irq(substream);
2276         return ret;
2277 }
2278
2279 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2280                                                   snd_pcm_uframes_t frames)
2281 {
2282         struct snd_pcm_runtime *runtime = substream->runtime;
2283         snd_pcm_sframes_t appl_ptr;
2284         snd_pcm_sframes_t ret;
2285         snd_pcm_sframes_t avail;
2286
2287         if (frames == 0)
2288                 return 0;
2289
2290         snd_pcm_stream_lock_irq(substream);
2291         switch (runtime->status->state) {
2292         case SNDRV_PCM_STATE_PREPARED:
2293         case SNDRV_PCM_STATE_PAUSED:
2294                 break;
2295         case SNDRV_PCM_STATE_DRAINING:
2296         case SNDRV_PCM_STATE_RUNNING:
2297                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2298                         break;
2299                 /* Fall through */
2300         case SNDRV_PCM_STATE_XRUN:
2301                 ret = -EPIPE;
2302                 goto __end;
2303         case SNDRV_PCM_STATE_SUSPENDED:
2304                 ret = -ESTRPIPE;
2305                 goto __end;
2306         default:
2307                 ret = -EBADFD;
2308                 goto __end;
2309         }
2310
2311         avail = snd_pcm_playback_avail(runtime);
2312         if (avail <= 0) {
2313                 ret = 0;
2314                 goto __end;
2315         }
2316         if (frames > (snd_pcm_uframes_t)avail)
2317                 frames = avail;
2318         appl_ptr = runtime->control->appl_ptr + frames;
2319         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2320                 appl_ptr -= runtime->boundary;
2321         runtime->control->appl_ptr = appl_ptr;
2322         ret = frames;
2323  __end:
2324         snd_pcm_stream_unlock_irq(substream);
2325         return ret;
2326 }
2327
2328 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2329                                                  snd_pcm_uframes_t frames)
2330 {
2331         struct snd_pcm_runtime *runtime = substream->runtime;
2332         snd_pcm_sframes_t appl_ptr;
2333         snd_pcm_sframes_t ret;
2334         snd_pcm_sframes_t avail;
2335
2336         if (frames == 0)
2337                 return 0;
2338
2339         snd_pcm_stream_lock_irq(substream);
2340         switch (runtime->status->state) {
2341         case SNDRV_PCM_STATE_PREPARED:
2342         case SNDRV_PCM_STATE_DRAINING:
2343         case SNDRV_PCM_STATE_PAUSED:
2344                 break;
2345         case SNDRV_PCM_STATE_RUNNING:
2346                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2347                         break;
2348                 /* Fall through */
2349         case SNDRV_PCM_STATE_XRUN:
2350                 ret = -EPIPE;
2351                 goto __end;
2352         case SNDRV_PCM_STATE_SUSPENDED:
2353                 ret = -ESTRPIPE;
2354                 goto __end;
2355         default:
2356                 ret = -EBADFD;
2357                 goto __end;
2358         }
2359
2360         avail = snd_pcm_capture_avail(runtime);
2361         if (avail <= 0) {
2362                 ret = 0;
2363                 goto __end;
2364         }
2365         if (frames > (snd_pcm_uframes_t)avail)
2366                 frames = avail;
2367         appl_ptr = runtime->control->appl_ptr + frames;
2368         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2369                 appl_ptr -= runtime->boundary;
2370         runtime->control->appl_ptr = appl_ptr;
2371         ret = frames;
2372  __end:
2373         snd_pcm_stream_unlock_irq(substream);
2374         return ret;
2375 }
2376
2377 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2378 {
2379         struct snd_pcm_runtime *runtime = substream->runtime;
2380         int err;
2381
2382         snd_pcm_stream_lock_irq(substream);
2383         switch (runtime->status->state) {
2384         case SNDRV_PCM_STATE_DRAINING:
2385                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2386                         goto __badfd;
2387         case SNDRV_PCM_STATE_RUNNING:
2388                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2389                         break;
2390                 /* Fall through */
2391         case SNDRV_PCM_STATE_PREPARED:
2392         case SNDRV_PCM_STATE_SUSPENDED:
2393                 err = 0;
2394                 break;
2395         case SNDRV_PCM_STATE_XRUN:
2396                 err = -EPIPE;
2397                 break;
2398         default:
2399               __badfd:
2400                 err = -EBADFD;
2401                 break;
2402         }
2403         snd_pcm_stream_unlock_irq(substream);
2404         return err;
2405 }
2406
2407 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2408                          snd_pcm_sframes_t __user *res)
2409 {
2410         struct snd_pcm_runtime *runtime = substream->runtime;
2411         int err;
2412         snd_pcm_sframes_t n = 0;
2413
2414         snd_pcm_stream_lock_irq(substream);
2415         switch (runtime->status->state) {
2416         case SNDRV_PCM_STATE_DRAINING:
2417                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2418                         goto __badfd;
2419         case SNDRV_PCM_STATE_RUNNING:
2420                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2421                         break;
2422                 /* Fall through */
2423         case SNDRV_PCM_STATE_PREPARED:
2424         case SNDRV_PCM_STATE_SUSPENDED:
2425                 err = 0;
2426                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2427                         n = snd_pcm_playback_hw_avail(runtime);
2428                 else
2429                         n = snd_pcm_capture_avail(runtime);
2430                 n += runtime->delay;
2431                 break;
2432         case SNDRV_PCM_STATE_XRUN:
2433                 err = -EPIPE;
2434                 break;
2435         default:
2436               __badfd:
2437                 err = -EBADFD;
2438                 break;
2439         }
2440         snd_pcm_stream_unlock_irq(substream);
2441         if (!err)
2442                 if (put_user(n, res))
2443                         err = -EFAULT;
2444         return err;
2445 }
2446
2447 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2448                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2449 {
2450         struct snd_pcm_runtime *runtime = substream->runtime;
2451         struct snd_pcm_sync_ptr sync_ptr;
2452         volatile struct snd_pcm_mmap_status *status;
2453         volatile struct snd_pcm_mmap_control *control;
2454         int err;
2455
2456         memset(&sync_ptr, 0, sizeof(sync_ptr));
2457         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2458                 return -EFAULT;
2459         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2460                 return -EFAULT;
2461         status = runtime->status;
2462         control = runtime->control;
2463         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2464                 err = snd_pcm_hwsync(substream);
2465                 if (err < 0)
2466                         return err;
2467         }
2468         snd_pcm_stream_lock_irq(substream);
2469         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2470                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2471         else
2472                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2473         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2474                 control->avail_min = sync_ptr.c.control.avail_min;
2475         else
2476                 sync_ptr.c.control.avail_min = control->avail_min;
2477         sync_ptr.s.status.state = status->state;
2478         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2479         sync_ptr.s.status.tstamp = status->tstamp;
2480         sync_ptr.s.status.suspended_state = status->suspended_state;
2481         snd_pcm_stream_unlock_irq(substream);
2482         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2483                 return -EFAULT;
2484         return 0;
2485 }
2486
2487 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2488 {
2489         struct snd_pcm_runtime *runtime = substream->runtime;
2490         int arg;
2491
2492         if (get_user(arg, _arg))
2493                 return -EFAULT;
2494         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2495                 return -EINVAL;
2496         runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2497         if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2498                 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2499         return 0;
2500 }
2501
2502 static int snd_pcm_common_ioctl1(struct file *file,
2503                                  struct snd_pcm_substream *substream,
2504                                  unsigned int cmd, void __user *arg)
2505 {
2506         switch (cmd) {
2507         case SNDRV_PCM_IOCTL_PVERSION:
2508                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2509         case SNDRV_PCM_IOCTL_INFO:
2510                 return snd_pcm_info_user(substream, arg);
2511         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2512                 return 0;
2513         case SNDRV_PCM_IOCTL_TTSTAMP:
2514                 return snd_pcm_tstamp(substream, arg);
2515         case SNDRV_PCM_IOCTL_HW_REFINE:
2516                 return snd_pcm_hw_refine_user(substream, arg);
2517         case SNDRV_PCM_IOCTL_HW_PARAMS:
2518                 return snd_pcm_hw_params_user(substream, arg);
2519         case SNDRV_PCM_IOCTL_HW_FREE:
2520                 return snd_pcm_hw_free(substream);
2521         case SNDRV_PCM_IOCTL_SW_PARAMS:
2522                 return snd_pcm_sw_params_user(substream, arg);
2523         case SNDRV_PCM_IOCTL_STATUS:
2524                 return snd_pcm_status_user(substream, arg);
2525         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2526                 return snd_pcm_channel_info_user(substream, arg);
2527         case SNDRV_PCM_IOCTL_PREPARE:
2528                 return snd_pcm_prepare(substream, file);
2529         case SNDRV_PCM_IOCTL_RESET:
2530                 return snd_pcm_reset(substream);
2531         case SNDRV_PCM_IOCTL_START:
2532                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2533         case SNDRV_PCM_IOCTL_LINK:
2534                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2535         case SNDRV_PCM_IOCTL_UNLINK:
2536                 return snd_pcm_unlink(substream);
2537         case SNDRV_PCM_IOCTL_RESUME:
2538                 return snd_pcm_resume(substream);
2539         case SNDRV_PCM_IOCTL_XRUN:
2540                 return snd_pcm_xrun(substream);
2541         case SNDRV_PCM_IOCTL_HWSYNC:
2542                 return snd_pcm_hwsync(substream);
2543         case SNDRV_PCM_IOCTL_DELAY:
2544                 return snd_pcm_delay(substream, arg);
2545         case SNDRV_PCM_IOCTL_SYNC_PTR:
2546                 return snd_pcm_sync_ptr(substream, arg);
2547 #ifdef CONFIG_SND_SUPPORT_OLD_API
2548         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2549                 return snd_pcm_hw_refine_old_user(substream, arg);
2550         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2551                 return snd_pcm_hw_params_old_user(substream, arg);
2552 #endif
2553         case SNDRV_PCM_IOCTL_DRAIN:
2554                 return snd_pcm_drain(substream, file);
2555         case SNDRV_PCM_IOCTL_DROP:
2556                 return snd_pcm_drop(substream);
2557         case SNDRV_PCM_IOCTL_PAUSE:
2558         {
2559                 int res;
2560                 snd_pcm_stream_lock_irq(substream);
2561                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2562                 snd_pcm_stream_unlock_irq(substream);
2563                 return res;
2564         }
2565         }
2566         snd_printd("unknown ioctl = 0x%x\n", cmd);
2567         return -ENOTTY;
2568 }
2569
2570 static int snd_pcm_playback_ioctl1(struct file *file,
2571                                    struct snd_pcm_substream *substream,
2572                                    unsigned int cmd, void __user *arg)
2573 {
2574         if (snd_BUG_ON(!substream))
2575                 return -ENXIO;
2576         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2577                 return -EINVAL;
2578         switch (cmd) {
2579         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2580         {
2581                 struct snd_xferi xferi;
2582                 struct snd_xferi __user *_xferi = arg;
2583                 struct snd_pcm_runtime *runtime = substream->runtime;
2584                 snd_pcm_sframes_t result;
2585                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2586                         return -EBADFD;
2587                 if (put_user(0, &_xferi->result))
2588                         return -EFAULT;
2589                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2590                         return -EFAULT;
2591                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2592                 __put_user(result, &_xferi->result);
2593                 return result < 0 ? result : 0;
2594         }
2595         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2596         {
2597                 struct snd_xfern xfern;
2598                 struct snd_xfern __user *_xfern = arg;
2599                 struct snd_pcm_runtime *runtime = substream->runtime;
2600                 void __user **bufs;
2601                 snd_pcm_sframes_t result;
2602                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2603                         return -EBADFD;
2604                 if (runtime->channels > 128)
2605                         return -EINVAL;
2606                 if (put_user(0, &_xfern->result))
2607                         return -EFAULT;
2608                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2609                         return -EFAULT;
2610
2611                 bufs = memdup_user(xfern.bufs,
2612                                    sizeof(void *) * runtime->channels);
2613                 if (IS_ERR(bufs))
2614                         return PTR_ERR(bufs);
2615                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2616                 kfree(bufs);
2617                 __put_user(result, &_xfern->result);
2618                 return result < 0 ? result : 0;
2619         }
2620         case SNDRV_PCM_IOCTL_REWIND:
2621         {
2622                 snd_pcm_uframes_t frames;
2623                 snd_pcm_uframes_t __user *_frames = arg;
2624                 snd_pcm_sframes_t result;
2625                 if (get_user(frames, _frames))
2626                         return -EFAULT;
2627                 if (put_user(0, _frames))
2628                         return -EFAULT;
2629                 result = snd_pcm_playback_rewind(substream, frames);
2630                 __put_user(result, _frames);
2631                 return result < 0 ? result : 0;
2632         }
2633         case SNDRV_PCM_IOCTL_FORWARD:
2634         {
2635                 snd_pcm_uframes_t frames;
2636                 snd_pcm_uframes_t __user *_frames = arg;
2637                 snd_pcm_sframes_t result;
2638                 if (get_user(frames, _frames))
2639                         return -EFAULT;
2640                 if (put_user(0, _frames))
2641                         return -EFAULT;
2642                 result = snd_pcm_playback_forward(substream, frames);
2643                 __put_user(result, _frames);
2644                 return result < 0 ? result : 0;
2645         }
2646         }
2647         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2648 }
2649
2650 static int snd_pcm_capture_ioctl1(struct file *file,
2651                                   struct snd_pcm_substream *substream,
2652                                   unsigned int cmd, void __user *arg)
2653 {
2654         if (snd_BUG_ON(!substream))
2655                 return -ENXIO;
2656         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2657                 return -EINVAL;
2658         switch (cmd) {
2659         case SNDRV_PCM_IOCTL_READI_FRAMES:
2660         {
2661                 struct snd_xferi xferi;
2662                 struct snd_xferi __user *_xferi = arg;
2663                 struct snd_pcm_runtime *runtime = substream->runtime;
2664                 snd_pcm_sframes_t result;
2665                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2666                         return -EBADFD;
2667                 if (put_user(0, &_xferi->result))
2668                         return -EFAULT;
2669                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2670                         return -EFAULT;
2671                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2672                 __put_user(result, &_xferi->result);
2673                 return result < 0 ? result : 0;
2674         }
2675         case SNDRV_PCM_IOCTL_READN_FRAMES:
2676         {
2677                 struct snd_xfern xfern;
2678                 struct snd_xfern __user *_xfern = arg;
2679                 struct snd_pcm_runtime *runtime = substream->runtime;
2680                 void *bufs;
2681                 snd_pcm_sframes_t result;
2682                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2683                         return -EBADFD;
2684                 if (runtime->channels > 128)
2685                         return -EINVAL;
2686                 if (put_user(0, &_xfern->result))
2687                         return -EFAULT;
2688                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2689                         return -EFAULT;
2690
2691                 bufs = memdup_user(xfern.bufs,
2692                                    sizeof(void *) * runtime->channels);
2693                 if (IS_ERR(bufs))
2694                         return PTR_ERR(bufs);
2695                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2696                 kfree(bufs);
2697                 __put_user(result, &_xfern->result);
2698                 return result < 0 ? result : 0;
2699         }
2700         case SNDRV_PCM_IOCTL_REWIND:
2701         {
2702                 snd_pcm_uframes_t frames;
2703                 snd_pcm_uframes_t __user *_frames = arg;
2704                 snd_pcm_sframes_t result;
2705                 if (get_user(frames, _frames))
2706                         return -EFAULT;
2707                 if (put_user(0, _frames))
2708                         return -EFAULT;
2709                 result = snd_pcm_capture_rewind(substream, frames);
2710                 __put_user(result, _frames);
2711                 return result < 0 ? result : 0;
2712         }
2713         case SNDRV_PCM_IOCTL_FORWARD:
2714         {
2715                 snd_pcm_uframes_t frames;
2716                 snd_pcm_uframes_t __user *_frames = arg;
2717                 snd_pcm_sframes_t result;
2718                 if (get_user(frames, _frames))
2719                         return -EFAULT;
2720                 if (put_user(0, _frames))
2721                         return -EFAULT;
2722                 result = snd_pcm_capture_forward(substream, frames);
2723                 __put_user(result, _frames);
2724                 return result < 0 ? result : 0;
2725         }
2726         }
2727         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2728 }
2729
2730 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2731                                    unsigned long arg)
2732 {
2733         struct snd_pcm_file *pcm_file;
2734
2735         pcm_file = file->private_data;
2736
2737         if (((cmd >> 8) & 0xff) != 'A')
2738                 return -ENOTTY;
2739
2740         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2741                                        (void __user *)arg);
2742 }
2743
2744 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2745                                   unsigned long arg)
2746 {
2747         struct snd_pcm_file *pcm_file;
2748
2749         pcm_file = file->private_data;
2750
2751         if (((cmd >> 8) & 0xff) != 'A')
2752                 return -ENOTTY;
2753
2754         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2755                                       (void __user *)arg);
2756 }
2757
2758 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2759                          unsigned int cmd, void *arg)
2760 {
2761         mm_segment_t fs;
2762         int result;
2763
2764         fs = snd_enter_user();
2765         switch (substream->stream) {
2766         case SNDRV_PCM_STREAM_PLAYBACK:
2767                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2768                                                  (void __user *)arg);
2769                 break;
2770         case SNDRV_PCM_STREAM_CAPTURE:
2771                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2772                                                 (void __user *)arg);
2773                 break;
2774         default:
2775                 result = -EINVAL;
2776                 break;
2777         }
2778         snd_leave_user(fs);
2779         return result;
2780 }
2781
2782 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2783
2784 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2785                             loff_t * offset)
2786 {
2787         struct snd_pcm_file *pcm_file;
2788         struct snd_pcm_substream *substream;
2789         struct snd_pcm_runtime *runtime;
2790         snd_pcm_sframes_t result;
2791
2792         pcm_file = file->private_data;
2793         substream = pcm_file->substream;
2794         if (PCM_RUNTIME_CHECK(substream))
2795                 return -ENXIO;
2796         runtime = substream->runtime;
2797         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2798                 return -EBADFD;
2799         if (!frame_aligned(runtime, count))
2800                 return -EINVAL;
2801         count = bytes_to_frames(runtime, count);
2802         result = snd_pcm_lib_read(substream, buf, count);
2803         if (result > 0)
2804                 result = frames_to_bytes(runtime, result);
2805         return result;
2806 }
2807
2808 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2809                              size_t count, loff_t * offset)
2810 {
2811         struct snd_pcm_file *pcm_file;
2812         struct snd_pcm_substream *substream;
2813         struct snd_pcm_runtime *runtime;
2814         snd_pcm_sframes_t result;
2815
2816         pcm_file = file->private_data;
2817         substream = pcm_file->substream;
2818         if (PCM_RUNTIME_CHECK(substream))
2819                 return -ENXIO;
2820         runtime = substream->runtime;
2821         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2822                 return -EBADFD;
2823         if (!frame_aligned(runtime, count))
2824                 return -EINVAL;
2825         count = bytes_to_frames(runtime, count);
2826         result = snd_pcm_lib_write(substream, buf, count);
2827         if (result > 0)
2828                 result = frames_to_bytes(runtime, result);
2829         return result;
2830 }
2831
2832 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2833                              unsigned long nr_segs, loff_t pos)
2834
2835 {
2836         struct snd_pcm_file *pcm_file;
2837         struct snd_pcm_substream *substream;
2838         struct snd_pcm_runtime *runtime;
2839         snd_pcm_sframes_t result;
2840         unsigned long i;
2841         void __user **bufs;
2842         snd_pcm_uframes_t frames;
2843
2844         pcm_file = iocb->ki_filp->private_data;
2845         substream = pcm_file->substream;
2846         if (PCM_RUNTIME_CHECK(substream))
2847                 return -ENXIO;
2848         runtime = substream->runtime;
2849         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2850                 return -EBADFD;
2851         if (nr_segs > 1024 || nr_segs != runtime->channels)
2852                 return -EINVAL;
2853         if (!frame_aligned(runtime, iov->iov_len))
2854                 return -EINVAL;
2855         frames = bytes_to_samples(runtime, iov->iov_len);
2856         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2857         if (bufs == NULL)
2858                 return -ENOMEM;
2859         for (i = 0; i < nr_segs; ++i)
2860                 bufs[i] = iov[i].iov_base;
2861         result = snd_pcm_lib_readv(substream, bufs, frames);
2862         if (result > 0)
2863                 result = frames_to_bytes(runtime, result);
2864         kfree(bufs);
2865         return result;
2866 }
2867
2868 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2869                               unsigned long nr_segs, loff_t pos)
2870 {
2871         struct snd_pcm_file *pcm_file;
2872         struct snd_pcm_substream *substream;
2873         struct snd_pcm_runtime *runtime;
2874         snd_pcm_sframes_t result;
2875         unsigned long i;
2876         void __user **bufs;
2877         snd_pcm_uframes_t frames;
2878
2879         pcm_file = iocb->ki_filp->private_data;
2880         substream = pcm_file->substream;
2881         if (PCM_RUNTIME_CHECK(substream))
2882                 return -ENXIO;
2883         runtime = substream->runtime;
2884         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2885                 return -EBADFD;
2886         if (nr_segs > 128 || nr_segs != runtime->channels ||
2887             !frame_aligned(runtime, iov->iov_len))
2888                 return -EINVAL;
2889         frames = bytes_to_samples(runtime, iov->iov_len);
2890         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2891         if (bufs == NULL)
2892                 return -ENOMEM;
2893         for (i = 0; i < nr_segs; ++i)
2894                 bufs[i] = iov[i].iov_base;
2895         result = snd_pcm_lib_writev(substream, bufs, frames);
2896         if (result > 0)
2897                 result = frames_to_bytes(runtime, result);
2898         kfree(bufs);
2899         return result;
2900 }
2901
2902 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2903 {
2904         struct snd_pcm_file *pcm_file;
2905         struct snd_pcm_substream *substream;
2906         struct snd_pcm_runtime *runtime;
2907         unsigned int mask;
2908         snd_pcm_uframes_t avail;
2909
2910         pcm_file = file->private_data;
2911
2912         substream = pcm_file->substream;
2913         if (PCM_RUNTIME_CHECK(substream))
2914                 return -ENXIO;
2915         runtime = substream->runtime;
2916
2917         poll_wait(file, &runtime->sleep, wait);
2918
2919         snd_pcm_stream_lock_irq(substream);
2920         avail = snd_pcm_playback_avail(runtime);
2921         switch (runtime->status->state) {
2922         case SNDRV_PCM_STATE_RUNNING:
2923         case SNDRV_PCM_STATE_PREPARED:
2924         case SNDRV_PCM_STATE_PAUSED:
2925                 if (avail >= runtime->control->avail_min) {
2926                         mask = POLLOUT | POLLWRNORM;
2927                         break;
2928                 }
2929                 /* Fall through */
2930         case SNDRV_PCM_STATE_DRAINING:
2931                 mask = 0;
2932                 break;
2933         default:
2934                 mask = POLLOUT | POLLWRNORM | POLLERR;
2935                 break;
2936         }
2937         snd_pcm_stream_unlock_irq(substream);
2938         return mask;
2939 }
2940
2941 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2942 {
2943         struct snd_pcm_file *pcm_file;
2944         struct snd_pcm_substream *substream;
2945         struct snd_pcm_runtime *runtime;
2946         unsigned int mask;
2947         snd_pcm_uframes_t avail;
2948
2949         pcm_file = file->private_data;
2950
2951         substream = pcm_file->substream;
2952         if (PCM_RUNTIME_CHECK(substream))
2953                 return -ENXIO;
2954         runtime = substream->runtime;
2955
2956         poll_wait(file, &runtime->sleep, wait);
2957
2958         snd_pcm_stream_lock_irq(substream);
2959         avail = snd_pcm_capture_avail(runtime);
2960         switch (runtime->status->state) {
2961         case SNDRV_PCM_STATE_RUNNING:
2962         case SNDRV_PCM_STATE_PREPARED:
2963         case SNDRV_PCM_STATE_PAUSED:
2964                 if (avail >= runtime->control->avail_min) {
2965                         mask = POLLIN | POLLRDNORM;
2966                         break;
2967                 }
2968                 mask = 0;
2969                 break;
2970         case SNDRV_PCM_STATE_DRAINING:
2971                 if (avail > 0) {
2972                         mask = POLLIN | POLLRDNORM;
2973                         break;
2974                 }
2975                 /* Fall through */
2976         default:
2977                 mask = POLLIN | POLLRDNORM | POLLERR;
2978                 break;
2979         }
2980         snd_pcm_stream_unlock_irq(substream);
2981         return mask;
2982 }
2983
2984 /*
2985  * mmap support
2986  */
2987
2988 /*
2989  * Only on coherent architectures, we can mmap the status and the control records
2990  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
2991  */
2992 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2993 /*
2994  * mmap status record
2995  */
2996 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2997                                                 struct vm_fault *vmf)
2998 {
2999         struct snd_pcm_substream *substream = area->vm_private_data;
3000         struct snd_pcm_runtime *runtime;
3001
3002         if (substream == NULL)
3003                 return VM_FAULT_SIGBUS;
3004         runtime = substream->runtime;
3005         vmf->page = virt_to_page(runtime->status);
3006         get_page(vmf->page);
3007         return 0;
3008 }
3009
3010 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3011 {
3012         .fault =        snd_pcm_mmap_status_fault,
3013 };
3014
3015 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3016                                struct vm_area_struct *area)
3017 {
3018         struct snd_pcm_runtime *runtime;
3019         long size;
3020         if (!(area->vm_flags & VM_READ))
3021                 return -EINVAL;
3022         runtime = substream->runtime;
3023         size = area->vm_end - area->vm_start;
3024         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3025                 return -EINVAL;
3026         area->vm_ops = &snd_pcm_vm_ops_status;
3027         area->vm_private_data = substream;
3028         area->vm_flags |= VM_RESERVED;
3029         return 0;
3030 }
3031
3032 /*
3033  * mmap control record
3034  */
3035 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3036                                                 struct vm_fault *vmf)
3037 {
3038         struct snd_pcm_substream *substream = area->vm_private_data;
3039         struct snd_pcm_runtime *runtime;
3040
3041         if (substream == NULL)
3042                 return VM_FAULT_SIGBUS;
3043         runtime = substream->runtime;
3044         vmf->page = virt_to_page(runtime->control);
3045         get_page(vmf->page);
3046         return 0;
3047 }
3048
3049 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3050 {
3051         .fault =        snd_pcm_mmap_control_fault,
3052 };
3053
3054 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3055                                 struct vm_area_struct *area)
3056 {
3057         struct snd_pcm_runtime *runtime;
3058         long size;
3059         if (!(area->vm_flags & VM_READ))
3060                 return -EINVAL;
3061         runtime = substream->runtime;
3062         size = area->vm_end - area->vm_start;
3063         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3064                 return -EINVAL;
3065         area->vm_ops = &snd_pcm_vm_ops_control;
3066         area->vm_private_data = substream;
3067         area->vm_flags |= VM_RESERVED;
3068         return 0;
3069 }
3070 #else /* ! coherent mmap */
3071 /*
3072  * don't support mmap for status and control records.
3073  */
3074 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3075                                struct vm_area_struct *area)
3076 {
3077         return -ENXIO;
3078 }
3079 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3080                                 struct vm_area_struct *area)
3081 {
3082         return -ENXIO;
3083 }
3084 #endif /* coherent mmap */
3085
3086 static inline struct page *
3087 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3088 {
3089         void *vaddr = substream->runtime->dma_area + ofs;
3090 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3091         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3092                 return virt_to_page(CAC_ADDR(vaddr));
3093 #endif
3094 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3095         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3096                 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3097                 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3098                 /* assume dma_handle set via pfn_to_phys() in
3099                  * mm/dma-noncoherent.c
3100                  */
3101                 return pfn_to_page(addr >> PAGE_SHIFT);
3102         }
3103 #endif
3104         return virt_to_page(vaddr);
3105 }
3106
3107 /*
3108  * fault callback for mmapping a RAM page
3109  */
3110 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3111                                                 struct vm_fault *vmf)
3112 {
3113         struct snd_pcm_substream *substream = area->vm_private_data;
3114         struct snd_pcm_runtime *runtime;
3115         unsigned long offset;
3116         struct page * page;
3117         size_t dma_bytes;
3118
3119         if (substream == NULL)
3120                 return VM_FAULT_SIGBUS;
3121         runtime = substream->runtime;
3122         offset = vmf->pgoff << PAGE_SHIFT;
3123         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3124         if (offset > dma_bytes - PAGE_SIZE)
3125                 return VM_FAULT_SIGBUS;
3126         if (substream->ops->page)
3127                 page = substream->ops->page(substream, offset);
3128         else
3129                 page = snd_pcm_default_page_ops(substream, offset);
3130         if (!page)
3131                 return VM_FAULT_SIGBUS;
3132         get_page(page);
3133         vmf->page = page;
3134         return 0;
3135 }
3136
3137 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3138         .open =         snd_pcm_mmap_data_open,
3139         .close =        snd_pcm_mmap_data_close,
3140 };
3141
3142 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3143         .open =         snd_pcm_mmap_data_open,
3144         .close =        snd_pcm_mmap_data_close,
3145         .fault =        snd_pcm_mmap_data_fault,
3146 };
3147
3148 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3149 /* This should be defined / handled globally! */
3150 #ifdef CONFIG_ARM
3151 #define ARCH_HAS_DMA_MMAP_COHERENT
3152 #endif
3153 #endif
3154
3155 /*
3156  * mmap the DMA buffer on RAM
3157  */
3158 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3159                                 struct vm_area_struct *area)
3160 {
3161         area->vm_flags |= VM_RESERVED;
3162 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3163         if (!substream->ops->page &&
3164             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3165                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3166                                          area,
3167                                          substream->runtime->dma_area,
3168                                          substream->runtime->dma_addr,
3169                                          area->vm_end - area->vm_start);
3170 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3171         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3172             !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3173                 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3174 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3175         /* mmap with fault handler */
3176         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3177         return 0;
3178 }
3179
3180 /*
3181  * mmap the DMA buffer on I/O memory area
3182  */
3183 #if SNDRV_PCM_INFO_MMAP_IOMEM
3184 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3185                            struct vm_area_struct *area)
3186 {
3187         long size;
3188         unsigned long offset;
3189
3190         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3191         area->vm_flags |= VM_IO;
3192         size = area->vm_end - area->vm_start;
3193         offset = area->vm_pgoff << PAGE_SHIFT;
3194         if (io_remap_pfn_range(area, area->vm_start,
3195                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3196                                 size, area->vm_page_prot))
3197                 return -EAGAIN;
3198         return 0;
3199 }
3200
3201 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3202 #endif /* SNDRV_PCM_INFO_MMAP */
3203
3204 /* mmap callback with pgprot_noncached */
3205 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream,
3206                                struct vm_area_struct *area)
3207 {
3208         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3209         return snd_pcm_default_mmap(substream, area);
3210 }
3211 EXPORT_SYMBOL(snd_pcm_lib_mmap_noncached);
3212
3213 /*
3214  * mmap DMA buffer
3215  */
3216 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3217                       struct vm_area_struct *area)
3218 {
3219         struct snd_pcm_runtime *runtime;
3220         long size;
3221         unsigned long offset;
3222         size_t dma_bytes;
3223         int err;
3224
3225         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3226                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3227                         return -EINVAL;
3228         } else {
3229                 if (!(area->vm_flags & VM_READ))
3230                         return -EINVAL;
3231         }
3232         runtime = substream->runtime;
3233         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3234                 return -EBADFD;
3235         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3236                 return -ENXIO;
3237         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3238             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3239                 return -EINVAL;
3240         size = area->vm_end - area->vm_start;
3241         offset = area->vm_pgoff << PAGE_SHIFT;
3242         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3243         if ((size_t)size > dma_bytes)
3244                 return -EINVAL;
3245         if (offset > dma_bytes - size)
3246                 return -EINVAL;
3247
3248         area->vm_ops = &snd_pcm_vm_ops_data;
3249         area->vm_private_data = substream;
3250         if (substream->ops->mmap)
3251                 err = substream->ops->mmap(substream, area);
3252         else
3253                 err = snd_pcm_default_mmap(substream, area);
3254         if (!err)
3255                 atomic_inc(&substream->mmap_count);
3256         return err;
3257 }
3258
3259 EXPORT_SYMBOL(snd_pcm_mmap_data);
3260
3261 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3262 {
3263         struct snd_pcm_file * pcm_file;
3264         struct snd_pcm_substream *substream;
3265         unsigned long offset;
3266
3267         pcm_file = file->private_data;
3268         substream = pcm_file->substream;
3269         if (PCM_RUNTIME_CHECK(substream))
3270                 return -ENXIO;
3271
3272         offset = area->vm_pgoff << PAGE_SHIFT;
3273         switch (offset) {
3274         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3275                 if (pcm_file->no_compat_mmap)
3276                         return -ENXIO;
3277                 return snd_pcm_mmap_status(substream, file, area);
3278         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3279                 if (pcm_file->no_compat_mmap)
3280                         return -ENXIO;
3281                 return snd_pcm_mmap_control(substream, file, area);
3282         default:
3283                 return snd_pcm_mmap_data(substream, file, area);
3284         }
3285         return 0;
3286 }
3287
3288 static int snd_pcm_fasync(int fd, struct file * file, int on)
3289 {
3290         struct snd_pcm_file * pcm_file;
3291         struct snd_pcm_substream *substream;
3292         struct snd_pcm_runtime *runtime;
3293
3294         pcm_file = file->private_data;
3295         substream = pcm_file->substream;
3296         if (PCM_RUNTIME_CHECK(substream))
3297                 return -ENXIO;
3298         runtime = substream->runtime;
3299         return fasync_helper(fd, file, on, &runtime->fasync);
3300 }
3301
3302 /*
3303  * ioctl32 compat
3304  */
3305 #ifdef CONFIG_COMPAT
3306 #include "pcm_compat.c"
3307 #else
3308 #define snd_pcm_ioctl_compat    NULL
3309 #endif
3310
3311 /*
3312  *  To be removed helpers to keep binary compatibility
3313  */
3314
3315 #ifdef CONFIG_SND_SUPPORT_OLD_API
3316 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3317 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3318
3319 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3320                                                struct snd_pcm_hw_params_old *oparams)
3321 {
3322         unsigned int i;
3323
3324         memset(params, 0, sizeof(*params));
3325         params->flags = oparams->flags;
3326         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3327                 params->masks[i].bits[0] = oparams->masks[i];
3328         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3329         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3330         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3331         params->info = oparams->info;
3332         params->msbits = oparams->msbits;
3333         params->rate_num = oparams->rate_num;
3334         params->rate_den = oparams->rate_den;
3335         params->fifo_size = oparams->fifo_size;
3336 }
3337
3338 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3339                                              struct snd_pcm_hw_params *params)
3340 {
3341         unsigned int i;
3342
3343         memset(oparams, 0, sizeof(*oparams));
3344         oparams->flags = params->flags;
3345         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3346                 oparams->masks[i] = params->masks[i].bits[0];
3347         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3348         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3349         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3350         oparams->info = params->info;
3351         oparams->msbits = params->msbits;
3352         oparams->rate_num = params->rate_num;
3353         oparams->rate_den = params->rate_den;
3354         oparams->fifo_size = params->fifo_size;
3355 }
3356
3357 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3358                                       struct snd_pcm_hw_params_old __user * _oparams)
3359 {
3360         struct snd_pcm_hw_params *params;
3361         struct snd_pcm_hw_params_old *oparams = NULL;
3362         int err;
3363
3364         params = kmalloc(sizeof(*params), GFP_KERNEL);
3365         if (!params)
3366                 return -ENOMEM;
3367
3368         oparams = memdup_user(_oparams, sizeof(*oparams));
3369         if (IS_ERR(oparams)) {
3370                 err = PTR_ERR(oparams);
3371                 goto out;
3372         }
3373         snd_pcm_hw_convert_from_old_params(params, oparams);
3374         err = snd_pcm_hw_refine(substream, params);
3375         snd_pcm_hw_convert_to_old_params(oparams, params);
3376         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3377                 if (!err)
3378                         err = -EFAULT;
3379         }
3380
3381         kfree(oparams);
3382 out:
3383         kfree(params);
3384         return err;
3385 }
3386
3387 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3388                                       struct snd_pcm_hw_params_old __user * _oparams)
3389 {
3390         struct snd_pcm_hw_params *params;
3391         struct snd_pcm_hw_params_old *oparams = NULL;
3392         int err;
3393
3394         params = kmalloc(sizeof(*params), GFP_KERNEL);
3395         if (!params)
3396                 return -ENOMEM;
3397
3398         oparams = memdup_user(_oparams, sizeof(*oparams));
3399         if (IS_ERR(oparams)) {
3400                 err = PTR_ERR(oparams);
3401                 goto out;
3402         }
3403         snd_pcm_hw_convert_from_old_params(params, oparams);
3404         err = snd_pcm_hw_params(substream, params);
3405         snd_pcm_hw_convert_to_old_params(oparams, params);
3406         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3407                 if (!err)
3408                         err = -EFAULT;
3409         }
3410
3411         kfree(oparams);
3412 out:
3413         kfree(params);
3414         return err;
3415 }
3416 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3417
3418 #ifndef CONFIG_MMU
3419 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3420                                                unsigned long addr,
3421                                                unsigned long len,
3422                                                unsigned long pgoff,
3423                                                unsigned long flags)
3424 {
3425         struct snd_pcm_file *pcm_file = file->private_data;
3426         struct snd_pcm_substream *substream = pcm_file->substream;
3427         struct snd_pcm_runtime *runtime = substream->runtime;
3428         unsigned long offset = pgoff << PAGE_SHIFT;
3429
3430         switch (offset) {
3431         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3432                 return (unsigned long)runtime->status;
3433         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3434                 return (unsigned long)runtime->control;
3435         default:
3436                 return (unsigned long)runtime->dma_area + offset;
3437         }
3438 }
3439 #else
3440 # define snd_pcm_get_unmapped_area NULL
3441 #endif
3442
3443 /*
3444  *  Register section
3445  */
3446
3447 const struct file_operations snd_pcm_f_ops[2] = {
3448         {
3449                 .owner =                THIS_MODULE,
3450                 .write =                snd_pcm_write,
3451                 .aio_write =            snd_pcm_aio_write,
3452                 .open =                 snd_pcm_playback_open,
3453                 .release =              snd_pcm_release,
3454                 .llseek =               no_llseek,
3455                 .poll =                 snd_pcm_playback_poll,
3456                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3457                 .compat_ioctl =         snd_pcm_ioctl_compat,
3458                 .mmap =                 snd_pcm_mmap,
3459                 .fasync =               snd_pcm_fasync,
3460                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3461         },
3462         {
3463                 .owner =                THIS_MODULE,
3464                 .read =                 snd_pcm_read,
3465                 .aio_read =             snd_pcm_aio_read,
3466                 .open =                 snd_pcm_capture_open,
3467                 .release =              snd_pcm_release,
3468                 .llseek =               no_llseek,
3469                 .poll =                 snd_pcm_capture_poll,
3470                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3471                 .compat_ioctl =         snd_pcm_ioctl_compat,
3472                 .mmap =                 snd_pcm_mmap,
3473                 .fasync =               snd_pcm_fasync,
3474                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3475         }
3476 };