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.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 unusable 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, snd_pcm_state_t 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                 snd_pcm_stream_unlock_irq(substream);
1485                 up_read(&snd_pcm_link_rwsem);
1486                 snd_power_unlock(card);
1487                 if (runtime->no_period_wakeup)
1488                         tout = MAX_SCHEDULE_TIMEOUT;
1489                 else {
1490                         tout = 10;
1491                         if (runtime->rate) {
1492                                 long t = runtime->period_size * 2 / runtime->rate;
1493                                 tout = max(t, tout);
1494                         }
1495                         tout = msecs_to_jiffies(tout * 1000);
1496                 }
1497                 tout = schedule_timeout_interruptible(tout);
1498                 snd_power_lock(card);
1499                 down_read(&snd_pcm_link_rwsem);
1500                 snd_pcm_stream_lock_irq(substream);
1501                 remove_wait_queue(&to_check->sleep, &wait);
1502                 if (tout == 0) {
1503                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1504                                 result = -ESTRPIPE;
1505                         else {
1506                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1507                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1508                                 result = -EIO;
1509                         }
1510                         break;
1511                 }
1512         }
1513
1514  unlock:
1515         snd_pcm_stream_unlock_irq(substream);
1516         up_read(&snd_pcm_link_rwsem);
1517         snd_power_unlock(card);
1518
1519         return result;
1520 }
1521
1522 /*
1523  * drop ioctl
1524  *
1525  * Immediately put all linked substreams into SETUP state.
1526  */
1527 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1528 {
1529         struct snd_pcm_runtime *runtime;
1530         int result = 0;
1531
1532         if (PCM_RUNTIME_CHECK(substream))
1533                 return -ENXIO;
1534         runtime = substream->runtime;
1535
1536         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1537             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1538             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1539                 return -EBADFD;
1540
1541         snd_pcm_stream_lock_irq(substream);
1542         /* resume pause */
1543         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1544                 snd_pcm_pause(substream, 0);
1545
1546         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1547         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1548         snd_pcm_stream_unlock_irq(substream);
1549
1550         return result;
1551 }
1552
1553
1554 /* WARNING: Don't forget to fput back the file */
1555 static struct file *snd_pcm_file_fd(int fd)
1556 {
1557         struct file *file;
1558         struct inode *inode;
1559         unsigned int minor;
1560
1561         file = fget(fd);
1562         if (!file)
1563                 return NULL;
1564         inode = file->f_path.dentry->d_inode;
1565         if (!S_ISCHR(inode->i_mode) ||
1566             imajor(inode) != snd_major) {
1567                 fput(file);
1568                 return NULL;
1569         }
1570         minor = iminor(inode);
1571         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1572             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1573                 fput(file);
1574                 return NULL;
1575         }
1576         return file;
1577 }
1578
1579 /*
1580  * PCM link handling
1581  */
1582 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1583 {
1584         int res = 0;
1585         struct file *file;
1586         struct snd_pcm_file *pcm_file;
1587         struct snd_pcm_substream *substream1;
1588
1589         file = snd_pcm_file_fd(fd);
1590         if (!file)
1591                 return -EBADFD;
1592         pcm_file = file->private_data;
1593         substream1 = pcm_file->substream;
1594         down_write(&snd_pcm_link_rwsem);
1595         write_lock_irq(&snd_pcm_link_rwlock);
1596         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1597             substream->runtime->status->state != substream1->runtime->status->state) {
1598                 res = -EBADFD;
1599                 goto _end;
1600         }
1601         if (snd_pcm_stream_linked(substream1)) {
1602                 res = -EALREADY;
1603                 goto _end;
1604         }
1605         if (!snd_pcm_stream_linked(substream)) {
1606                 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1607                 if (substream->group == NULL) {
1608                         res = -ENOMEM;
1609                         goto _end;
1610                 }
1611                 spin_lock_init(&substream->group->lock);
1612                 INIT_LIST_HEAD(&substream->group->substreams);
1613                 list_add_tail(&substream->link_list, &substream->group->substreams);
1614                 substream->group->count = 1;
1615         }
1616         list_add_tail(&substream1->link_list, &substream->group->substreams);
1617         substream->group->count++;
1618         substream1->group = substream->group;
1619  _end:
1620         write_unlock_irq(&snd_pcm_link_rwlock);
1621         up_write(&snd_pcm_link_rwsem);
1622         fput(file);
1623         return res;
1624 }
1625
1626 static void relink_to_local(struct snd_pcm_substream *substream)
1627 {
1628         substream->group = &substream->self_group;
1629         INIT_LIST_HEAD(&substream->self_group.substreams);
1630         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1631 }
1632
1633 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1634 {
1635         struct snd_pcm_substream *s;
1636         int res = 0;
1637
1638         down_write(&snd_pcm_link_rwsem);
1639         write_lock_irq(&snd_pcm_link_rwlock);
1640         if (!snd_pcm_stream_linked(substream)) {
1641                 res = -EALREADY;
1642                 goto _end;
1643         }
1644         list_del(&substream->link_list);
1645         substream->group->count--;
1646         if (substream->group->count == 1) {     /* detach the last stream, too */
1647                 snd_pcm_group_for_each_entry(s, substream) {
1648                         relink_to_local(s);
1649                         break;
1650                 }
1651                 kfree(substream->group);
1652         }
1653         relink_to_local(substream);
1654        _end:
1655         write_unlock_irq(&snd_pcm_link_rwlock);
1656         up_write(&snd_pcm_link_rwsem);
1657         return res;
1658 }
1659
1660 /*
1661  * hw configurator
1662  */
1663 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1664                                struct snd_pcm_hw_rule *rule)
1665 {
1666         struct snd_interval t;
1667         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1668                      hw_param_interval_c(params, rule->deps[1]), &t);
1669         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1670 }
1671
1672 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1673                                struct snd_pcm_hw_rule *rule)
1674 {
1675         struct snd_interval t;
1676         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1677                      hw_param_interval_c(params, rule->deps[1]), &t);
1678         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1679 }
1680
1681 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1682                                    struct snd_pcm_hw_rule *rule)
1683 {
1684         struct snd_interval t;
1685         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1686                          hw_param_interval_c(params, rule->deps[1]),
1687                          (unsigned long) rule->private, &t);
1688         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1689 }
1690
1691 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1692                                    struct snd_pcm_hw_rule *rule)
1693 {
1694         struct snd_interval t;
1695         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1696                          (unsigned long) rule->private,
1697                          hw_param_interval_c(params, rule->deps[1]), &t);
1698         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1699 }
1700
1701 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1702                                   struct snd_pcm_hw_rule *rule)
1703 {
1704         unsigned int k;
1705         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1706         struct snd_mask m;
1707         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1708         snd_mask_any(&m);
1709         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1710                 int bits;
1711                 if (! snd_mask_test(mask, k))
1712                         continue;
1713                 bits = snd_pcm_format_physical_width(k);
1714                 if (bits <= 0)
1715                         continue; /* ignore invalid formats */
1716                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1717                         snd_mask_reset(&m, k);
1718         }
1719         return snd_mask_refine(mask, &m);
1720 }
1721
1722 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1723                                        struct snd_pcm_hw_rule *rule)
1724 {
1725         struct snd_interval t;
1726         unsigned int k;
1727         t.min = UINT_MAX;
1728         t.max = 0;
1729         t.openmin = 0;
1730         t.openmax = 0;
1731         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1732                 int bits;
1733                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1734                         continue;
1735                 bits = snd_pcm_format_physical_width(k);
1736                 if (bits <= 0)
1737                         continue; /* ignore invalid formats */
1738                 if (t.min > (unsigned)bits)
1739                         t.min = bits;
1740                 if (t.max < (unsigned)bits)
1741                         t.max = bits;
1742         }
1743         t.integer = 1;
1744         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1745 }
1746
1747 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1748 #error "Change this table"
1749 #endif
1750
1751 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1752                                  48000, 64000, 88200, 96000, 176400, 192000 };
1753
1754 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1755         .count = ARRAY_SIZE(rates),
1756         .list = rates,
1757 };
1758
1759 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1760                                 struct snd_pcm_hw_rule *rule)
1761 {
1762         struct snd_pcm_hardware *hw = rule->private;
1763         return snd_interval_list(hw_param_interval(params, rule->var),
1764                                  snd_pcm_known_rates.count,
1765                                  snd_pcm_known_rates.list, hw->rates);
1766 }
1767
1768 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1769                                             struct snd_pcm_hw_rule *rule)
1770 {
1771         struct snd_interval t;
1772         struct snd_pcm_substream *substream = rule->private;
1773         t.min = 0;
1774         t.max = substream->buffer_bytes_max;
1775         t.openmin = 0;
1776         t.openmax = 0;
1777         t.integer = 1;
1778         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1779 }
1780
1781 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1782 {
1783         struct snd_pcm_runtime *runtime = substream->runtime;
1784         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1785         int k, err;
1786
1787         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1788                 snd_mask_any(constrs_mask(constrs, k));
1789         }
1790
1791         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1792                 snd_interval_any(constrs_interval(constrs, k));
1793         }
1794
1795         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1796         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1797         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1798         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1799         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1800
1801         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1802                                    snd_pcm_hw_rule_format, NULL,
1803                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1804         if (err < 0)
1805                 return err;
1806         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1807                                   snd_pcm_hw_rule_sample_bits, NULL,
1808                                   SNDRV_PCM_HW_PARAM_FORMAT,
1809                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1810         if (err < 0)
1811                 return err;
1812         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1813                                   snd_pcm_hw_rule_div, NULL,
1814                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1815         if (err < 0)
1816                 return err;
1817         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1818                                   snd_pcm_hw_rule_mul, NULL,
1819                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1820         if (err < 0)
1821                 return err;
1822         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1823                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1824                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1825         if (err < 0)
1826                 return err;
1827         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1828                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1829                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1830         if (err < 0)
1831                 return err;
1832         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1833                                   snd_pcm_hw_rule_div, NULL,
1834                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1835         if (err < 0)
1836                 return err;
1837         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1838                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1839                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1840         if (err < 0)
1841                 return err;
1842         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1843                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1844                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1845         if (err < 0)
1846                 return err;
1847         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1848                                   snd_pcm_hw_rule_div, NULL,
1849                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1850         if (err < 0)
1851                 return err;
1852         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1853                                   snd_pcm_hw_rule_div, NULL,
1854                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1855         if (err < 0)
1856                 return err;
1857         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1858                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1859                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1860         if (err < 0)
1861                 return err;
1862         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1863                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1864                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1865         if (err < 0)
1866                 return err;
1867         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1868                                   snd_pcm_hw_rule_mul, NULL,
1869                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1870         if (err < 0)
1871                 return err;
1872         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1873                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1874                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1875         if (err < 0)
1876                 return err;
1877         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1878                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1879                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1880         if (err < 0)
1881                 return err;
1882         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1883                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1884                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1885         if (err < 0)
1886                 return err;
1887         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1888                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1889                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1890         if (err < 0)
1891                 return err;
1892         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1893                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1894                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1895         if (err < 0)
1896                 return err;
1897         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1898                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1899                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1900         if (err < 0)
1901                 return err;
1902         return 0;
1903 }
1904
1905 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1906 {
1907         struct snd_pcm_runtime *runtime = substream->runtime;
1908         struct snd_pcm_hardware *hw = &runtime->hw;
1909         int err;
1910         unsigned int mask = 0;
1911
1912         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1913                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1914         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1915                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1916         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1917                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1918                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1919                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1920                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1921                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1922                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1923         }
1924         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1925         if (err < 0)
1926                 return err;
1927
1928         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1929         if (err < 0)
1930                 return err;
1931
1932         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1933         if (err < 0)
1934                 return err;
1935
1936         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1937                                            hw->channels_min, hw->channels_max);
1938         if (err < 0)
1939                 return err;
1940
1941         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1942                                            hw->rate_min, hw->rate_max);
1943         if (err < 0)
1944                 return err;
1945
1946         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1947                                            hw->period_bytes_min, hw->period_bytes_max);
1948         if (err < 0)
1949                 return err;
1950
1951         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1952                                            hw->periods_min, hw->periods_max);
1953         if (err < 0)
1954                 return err;
1955
1956         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1957                                            hw->period_bytes_min, hw->buffer_bytes_max);
1958         if (err < 0)
1959                 return err;
1960
1961         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1962                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1963                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1964         if (err < 0)
1965                 return err;
1966
1967         /* FIXME: remove */
1968         if (runtime->dma_bytes) {
1969                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1970                 if (err < 0)
1971                         return -EINVAL;
1972         }
1973
1974         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1975                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1976                                           snd_pcm_hw_rule_rate, hw,
1977                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1978                 if (err < 0)
1979                         return err;
1980         }
1981
1982         /* FIXME: this belong to lowlevel */
1983         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1984
1985         return 0;
1986 }
1987
1988 static void pcm_release_private(struct snd_pcm_substream *substream)
1989 {
1990         snd_pcm_unlink(substream);
1991 }
1992
1993 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1994 {
1995         substream->ref_count--;
1996         if (substream->ref_count > 0)
1997                 return;
1998
1999         snd_pcm_drop(substream);
2000         if (substream->hw_opened) {
2001                 if (substream->ops->hw_free != NULL)
2002                         substream->ops->hw_free(substream);
2003                 substream->ops->close(substream);
2004                 substream->hw_opened = 0;
2005         }
2006         if (pm_qos_request_active(&substream->latency_pm_qos_req))
2007                 pm_qos_remove_request(&substream->latency_pm_qos_req);
2008         if (substream->pcm_release) {
2009                 substream->pcm_release(substream);
2010                 substream->pcm_release = NULL;
2011         }
2012         snd_pcm_detach_substream(substream);
2013 }
2014
2015 EXPORT_SYMBOL(snd_pcm_release_substream);
2016
2017 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2018                            struct file *file,
2019                            struct snd_pcm_substream **rsubstream)
2020 {
2021         struct snd_pcm_substream *substream;
2022         int err;
2023
2024         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2025         if (err < 0)
2026                 return err;
2027         if (substream->ref_count > 1) {
2028                 *rsubstream = substream;
2029                 return 0;
2030         }
2031
2032         err = snd_pcm_hw_constraints_init(substream);
2033         if (err < 0) {
2034                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2035                 goto error;
2036         }
2037
2038         if ((err = substream->ops->open(substream)) < 0)
2039                 goto error;
2040
2041         substream->hw_opened = 1;
2042
2043         err = snd_pcm_hw_constraints_complete(substream);
2044         if (err < 0) {
2045                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2046                 goto error;
2047         }
2048
2049         *rsubstream = substream;
2050         return 0;
2051
2052  error:
2053         snd_pcm_release_substream(substream);
2054         return err;
2055 }
2056
2057 EXPORT_SYMBOL(snd_pcm_open_substream);
2058
2059 static int snd_pcm_open_file(struct file *file,
2060                              struct snd_pcm *pcm,
2061                              int stream)
2062 {
2063         struct snd_pcm_file *pcm_file;
2064         struct snd_pcm_substream *substream;
2065         int err;
2066
2067         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2068         if (err < 0)
2069                 return err;
2070
2071         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2072         if (pcm_file == NULL) {
2073                 snd_pcm_release_substream(substream);
2074                 return -ENOMEM;
2075         }
2076         pcm_file->substream = substream;
2077         if (substream->ref_count == 1) {
2078                 substream->file = pcm_file;
2079                 substream->pcm_release = pcm_release_private;
2080         }
2081         file->private_data = pcm_file;
2082
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         wait_queue_t wait;
2112
2113         if (pcm == NULL) {
2114                 err = -ENODEV;
2115                 goto __error1;
2116         }
2117         err = snd_card_file_add(pcm->card, file);
2118         if (err < 0)
2119                 goto __error1;
2120         if (!try_module_get(pcm->card->module)) {
2121                 err = -EFAULT;
2122                 goto __error2;
2123         }
2124         init_waitqueue_entry(&wait, current);
2125         add_wait_queue(&pcm->open_wait, &wait);
2126         mutex_lock(&pcm->open_mutex);
2127         while (1) {
2128                 err = snd_pcm_open_file(file, pcm, stream);
2129                 if (err >= 0)
2130                         break;
2131                 if (err == -EAGAIN) {
2132                         if (file->f_flags & O_NONBLOCK) {
2133                                 err = -EBUSY;
2134                                 break;
2135                         }
2136                 } else
2137                         break;
2138                 set_current_state(TASK_INTERRUPTIBLE);
2139                 mutex_unlock(&pcm->open_mutex);
2140                 schedule();
2141                 mutex_lock(&pcm->open_mutex);
2142                 if (signal_pending(current)) {
2143                         err = -ERESTARTSYS;
2144                         break;
2145                 }
2146         }
2147         remove_wait_queue(&pcm->open_wait, &wait);
2148         mutex_unlock(&pcm->open_mutex);
2149         if (err < 0)
2150                 goto __error;
2151         return err;
2152
2153       __error:
2154         module_put(pcm->card->module);
2155       __error2:
2156         snd_card_file_remove(pcm->card, file);
2157       __error1:
2158         return err;
2159 }
2160
2161 static int snd_pcm_release(struct inode *inode, struct file *file)
2162 {
2163         struct snd_pcm *pcm;
2164         struct snd_pcm_substream *substream;
2165         struct snd_pcm_file *pcm_file;
2166
2167         pcm_file = file->private_data;
2168         substream = pcm_file->substream;
2169         if (snd_BUG_ON(!substream))
2170                 return -ENXIO;
2171         pcm = substream->pcm;
2172         mutex_lock(&pcm->open_mutex);
2173         snd_pcm_release_substream(substream);
2174         kfree(pcm_file);
2175         mutex_unlock(&pcm->open_mutex);
2176         wake_up(&pcm->open_wait);
2177         module_put(pcm->card->module);
2178         snd_card_file_remove(pcm->card, file);
2179         return 0;
2180 }
2181
2182 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2183                                                  snd_pcm_uframes_t frames)
2184 {
2185         struct snd_pcm_runtime *runtime = substream->runtime;
2186         snd_pcm_sframes_t appl_ptr;
2187         snd_pcm_sframes_t ret;
2188         snd_pcm_sframes_t hw_avail;
2189
2190         if (frames == 0)
2191                 return 0;
2192
2193         snd_pcm_stream_lock_irq(substream);
2194         switch (runtime->status->state) {
2195         case SNDRV_PCM_STATE_PREPARED:
2196                 break;
2197         case SNDRV_PCM_STATE_DRAINING:
2198         case SNDRV_PCM_STATE_RUNNING:
2199                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2200                         break;
2201                 /* Fall through */
2202         case SNDRV_PCM_STATE_XRUN:
2203                 ret = -EPIPE;
2204                 goto __end;
2205         case SNDRV_PCM_STATE_SUSPENDED:
2206                 ret = -ESTRPIPE;
2207                 goto __end;
2208         default:
2209                 ret = -EBADFD;
2210                 goto __end;
2211         }
2212
2213         hw_avail = snd_pcm_playback_hw_avail(runtime);
2214         if (hw_avail <= 0) {
2215                 ret = 0;
2216                 goto __end;
2217         }
2218         if (frames > (snd_pcm_uframes_t)hw_avail)
2219                 frames = hw_avail;
2220         appl_ptr = runtime->control->appl_ptr - frames;
2221         if (appl_ptr < 0)
2222                 appl_ptr += runtime->boundary;
2223         runtime->control->appl_ptr = appl_ptr;
2224         ret = frames;
2225  __end:
2226         snd_pcm_stream_unlock_irq(substream);
2227         return ret;
2228 }
2229
2230 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2231                                                 snd_pcm_uframes_t frames)
2232 {
2233         struct snd_pcm_runtime *runtime = substream->runtime;
2234         snd_pcm_sframes_t appl_ptr;
2235         snd_pcm_sframes_t ret;
2236         snd_pcm_sframes_t hw_avail;
2237
2238         if (frames == 0)
2239                 return 0;
2240
2241         snd_pcm_stream_lock_irq(substream);
2242         switch (runtime->status->state) {
2243         case SNDRV_PCM_STATE_PREPARED:
2244         case SNDRV_PCM_STATE_DRAINING:
2245                 break;
2246         case SNDRV_PCM_STATE_RUNNING:
2247                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2248                         break;
2249                 /* Fall through */
2250         case SNDRV_PCM_STATE_XRUN:
2251                 ret = -EPIPE;
2252                 goto __end;
2253         case SNDRV_PCM_STATE_SUSPENDED:
2254                 ret = -ESTRPIPE;
2255                 goto __end;
2256         default:
2257                 ret = -EBADFD;
2258                 goto __end;
2259         }
2260
2261         hw_avail = snd_pcm_capture_hw_avail(runtime);
2262         if (hw_avail <= 0) {
2263                 ret = 0;
2264                 goto __end;
2265         }
2266         if (frames > (snd_pcm_uframes_t)hw_avail)
2267                 frames = hw_avail;
2268         appl_ptr = runtime->control->appl_ptr - frames;
2269         if (appl_ptr < 0)
2270                 appl_ptr += runtime->boundary;
2271         runtime->control->appl_ptr = appl_ptr;
2272         ret = frames;
2273  __end:
2274         snd_pcm_stream_unlock_irq(substream);
2275         return ret;
2276 }
2277
2278 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2279                                                   snd_pcm_uframes_t frames)
2280 {
2281         struct snd_pcm_runtime *runtime = substream->runtime;
2282         snd_pcm_sframes_t appl_ptr;
2283         snd_pcm_sframes_t ret;
2284         snd_pcm_sframes_t avail;
2285
2286         if (frames == 0)
2287                 return 0;
2288
2289         snd_pcm_stream_lock_irq(substream);
2290         switch (runtime->status->state) {
2291         case SNDRV_PCM_STATE_PREPARED:
2292         case SNDRV_PCM_STATE_PAUSED:
2293                 break;
2294         case SNDRV_PCM_STATE_DRAINING:
2295         case SNDRV_PCM_STATE_RUNNING:
2296                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2297                         break;
2298                 /* Fall through */
2299         case SNDRV_PCM_STATE_XRUN:
2300                 ret = -EPIPE;
2301                 goto __end;
2302         case SNDRV_PCM_STATE_SUSPENDED:
2303                 ret = -ESTRPIPE;
2304                 goto __end;
2305         default:
2306                 ret = -EBADFD;
2307                 goto __end;
2308         }
2309
2310         avail = snd_pcm_playback_avail(runtime);
2311         if (avail <= 0) {
2312                 ret = 0;
2313                 goto __end;
2314         }
2315         if (frames > (snd_pcm_uframes_t)avail)
2316                 frames = avail;
2317         appl_ptr = runtime->control->appl_ptr + frames;
2318         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2319                 appl_ptr -= runtime->boundary;
2320         runtime->control->appl_ptr = appl_ptr;
2321         ret = frames;
2322  __end:
2323         snd_pcm_stream_unlock_irq(substream);
2324         return ret;
2325 }
2326
2327 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2328                                                  snd_pcm_uframes_t frames)
2329 {
2330         struct snd_pcm_runtime *runtime = substream->runtime;
2331         snd_pcm_sframes_t appl_ptr;
2332         snd_pcm_sframes_t ret;
2333         snd_pcm_sframes_t avail;
2334
2335         if (frames == 0)
2336                 return 0;
2337
2338         snd_pcm_stream_lock_irq(substream);
2339         switch (runtime->status->state) {
2340         case SNDRV_PCM_STATE_PREPARED:
2341         case SNDRV_PCM_STATE_DRAINING:
2342         case SNDRV_PCM_STATE_PAUSED:
2343                 break;
2344         case SNDRV_PCM_STATE_RUNNING:
2345                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2346                         break;
2347                 /* Fall through */
2348         case SNDRV_PCM_STATE_XRUN:
2349                 ret = -EPIPE;
2350                 goto __end;
2351         case SNDRV_PCM_STATE_SUSPENDED:
2352                 ret = -ESTRPIPE;
2353                 goto __end;
2354         default:
2355                 ret = -EBADFD;
2356                 goto __end;
2357         }
2358
2359         avail = snd_pcm_capture_avail(runtime);
2360         if (avail <= 0) {
2361                 ret = 0;
2362                 goto __end;
2363         }
2364         if (frames > (snd_pcm_uframes_t)avail)
2365                 frames = avail;
2366         appl_ptr = runtime->control->appl_ptr + frames;
2367         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2368                 appl_ptr -= runtime->boundary;
2369         runtime->control->appl_ptr = appl_ptr;
2370         ret = frames;
2371  __end:
2372         snd_pcm_stream_unlock_irq(substream);
2373         return ret;
2374 }
2375
2376 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2377 {
2378         struct snd_pcm_runtime *runtime = substream->runtime;
2379         int err;
2380
2381         snd_pcm_stream_lock_irq(substream);
2382         switch (runtime->status->state) {
2383         case SNDRV_PCM_STATE_DRAINING:
2384                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2385                         goto __badfd;
2386         case SNDRV_PCM_STATE_RUNNING:
2387                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2388                         break;
2389                 /* Fall through */
2390         case SNDRV_PCM_STATE_PREPARED:
2391         case SNDRV_PCM_STATE_SUSPENDED:
2392                 err = 0;
2393                 break;
2394         case SNDRV_PCM_STATE_XRUN:
2395                 err = -EPIPE;
2396                 break;
2397         default:
2398               __badfd:
2399                 err = -EBADFD;
2400                 break;
2401         }
2402         snd_pcm_stream_unlock_irq(substream);
2403         return err;
2404 }
2405
2406 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2407                          snd_pcm_sframes_t __user *res)
2408 {
2409         struct snd_pcm_runtime *runtime = substream->runtime;
2410         int err;
2411         snd_pcm_sframes_t n = 0;
2412
2413         snd_pcm_stream_lock_irq(substream);
2414         switch (runtime->status->state) {
2415         case SNDRV_PCM_STATE_DRAINING:
2416                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2417                         goto __badfd;
2418         case SNDRV_PCM_STATE_RUNNING:
2419                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2420                         break;
2421                 /* Fall through */
2422         case SNDRV_PCM_STATE_PREPARED:
2423         case SNDRV_PCM_STATE_SUSPENDED:
2424                 err = 0;
2425                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2426                         n = snd_pcm_playback_hw_avail(runtime);
2427                 else
2428                         n = snd_pcm_capture_avail(runtime);
2429                 n += runtime->delay;
2430                 break;
2431         case SNDRV_PCM_STATE_XRUN:
2432                 err = -EPIPE;
2433                 break;
2434         default:
2435               __badfd:
2436                 err = -EBADFD;
2437                 break;
2438         }
2439         snd_pcm_stream_unlock_irq(substream);
2440         if (!err)
2441                 if (put_user(n, res))
2442                         err = -EFAULT;
2443         return err;
2444 }
2445
2446 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2447                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2448 {
2449         struct snd_pcm_runtime *runtime = substream->runtime;
2450         struct snd_pcm_sync_ptr sync_ptr;
2451         volatile struct snd_pcm_mmap_status *status;
2452         volatile struct snd_pcm_mmap_control *control;
2453         int err;
2454
2455         memset(&sync_ptr, 0, sizeof(sync_ptr));
2456         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2457                 return -EFAULT;
2458         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2459                 return -EFAULT;
2460         status = runtime->status;
2461         control = runtime->control;
2462         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2463                 err = snd_pcm_hwsync(substream);
2464                 if (err < 0)
2465                         return err;
2466         }
2467         snd_pcm_stream_lock_irq(substream);
2468         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2469                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2470         else
2471                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2472         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2473                 control->avail_min = sync_ptr.c.control.avail_min;
2474         else
2475                 sync_ptr.c.control.avail_min = control->avail_min;
2476         sync_ptr.s.status.state = status->state;
2477         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2478         sync_ptr.s.status.tstamp = status->tstamp;
2479         sync_ptr.s.status.suspended_state = status->suspended_state;
2480         snd_pcm_stream_unlock_irq(substream);
2481         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2482                 return -EFAULT;
2483         return 0;
2484 }
2485
2486 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2487 {
2488         struct snd_pcm_runtime *runtime = substream->runtime;
2489         int arg;
2490
2491         if (get_user(arg, _arg))
2492                 return -EFAULT;
2493         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2494                 return -EINVAL;
2495         runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2496         if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2497                 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2498         return 0;
2499 }
2500
2501 static int snd_pcm_common_ioctl1(struct file *file,
2502                                  struct snd_pcm_substream *substream,
2503                                  unsigned int cmd, void __user *arg)
2504 {
2505         switch (cmd) {
2506         case SNDRV_PCM_IOCTL_PVERSION:
2507                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2508         case SNDRV_PCM_IOCTL_INFO:
2509                 return snd_pcm_info_user(substream, arg);
2510         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2511                 return 0;
2512         case SNDRV_PCM_IOCTL_TTSTAMP:
2513                 return snd_pcm_tstamp(substream, arg);
2514         case SNDRV_PCM_IOCTL_HW_REFINE:
2515                 return snd_pcm_hw_refine_user(substream, arg);
2516         case SNDRV_PCM_IOCTL_HW_PARAMS:
2517                 return snd_pcm_hw_params_user(substream, arg);
2518         case SNDRV_PCM_IOCTL_HW_FREE:
2519                 return snd_pcm_hw_free(substream);
2520         case SNDRV_PCM_IOCTL_SW_PARAMS:
2521                 return snd_pcm_sw_params_user(substream, arg);
2522         case SNDRV_PCM_IOCTL_STATUS:
2523                 return snd_pcm_status_user(substream, arg);
2524         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2525                 return snd_pcm_channel_info_user(substream, arg);
2526         case SNDRV_PCM_IOCTL_PREPARE:
2527                 return snd_pcm_prepare(substream, file);
2528         case SNDRV_PCM_IOCTL_RESET:
2529                 return snd_pcm_reset(substream);
2530         case SNDRV_PCM_IOCTL_START:
2531                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2532         case SNDRV_PCM_IOCTL_LINK:
2533                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2534         case SNDRV_PCM_IOCTL_UNLINK:
2535                 return snd_pcm_unlink(substream);
2536         case SNDRV_PCM_IOCTL_RESUME:
2537                 return snd_pcm_resume(substream);
2538         case SNDRV_PCM_IOCTL_XRUN:
2539                 return snd_pcm_xrun(substream);
2540         case SNDRV_PCM_IOCTL_HWSYNC:
2541                 return snd_pcm_hwsync(substream);
2542         case SNDRV_PCM_IOCTL_DELAY:
2543                 return snd_pcm_delay(substream, arg);
2544         case SNDRV_PCM_IOCTL_SYNC_PTR:
2545                 return snd_pcm_sync_ptr(substream, arg);
2546 #ifdef CONFIG_SND_SUPPORT_OLD_API
2547         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2548                 return snd_pcm_hw_refine_old_user(substream, arg);
2549         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2550                 return snd_pcm_hw_params_old_user(substream, arg);
2551 #endif
2552         case SNDRV_PCM_IOCTL_DRAIN:
2553                 return snd_pcm_drain(substream, file);
2554         case SNDRV_PCM_IOCTL_DROP:
2555                 return snd_pcm_drop(substream);
2556         case SNDRV_PCM_IOCTL_PAUSE:
2557         {
2558                 int res;
2559                 snd_pcm_stream_lock_irq(substream);
2560                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2561                 snd_pcm_stream_unlock_irq(substream);
2562                 return res;
2563         }
2564         }
2565         snd_printd("unknown ioctl = 0x%x\n", cmd);
2566         return -ENOTTY;
2567 }
2568
2569 static int snd_pcm_playback_ioctl1(struct file *file,
2570                                    struct snd_pcm_substream *substream,
2571                                    unsigned int cmd, void __user *arg)
2572 {
2573         if (snd_BUG_ON(!substream))
2574                 return -ENXIO;
2575         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2576                 return -EINVAL;
2577         switch (cmd) {
2578         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2579         {
2580                 struct snd_xferi xferi;
2581                 struct snd_xferi __user *_xferi = arg;
2582                 struct snd_pcm_runtime *runtime = substream->runtime;
2583                 snd_pcm_sframes_t result;
2584                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2585                         return -EBADFD;
2586                 if (put_user(0, &_xferi->result))
2587                         return -EFAULT;
2588                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2589                         return -EFAULT;
2590                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2591                 __put_user(result, &_xferi->result);
2592                 return result < 0 ? result : 0;
2593         }
2594         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2595         {
2596                 struct snd_xfern xfern;
2597                 struct snd_xfern __user *_xfern = arg;
2598                 struct snd_pcm_runtime *runtime = substream->runtime;
2599                 void __user **bufs;
2600                 snd_pcm_sframes_t result;
2601                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2602                         return -EBADFD;
2603                 if (runtime->channels > 128)
2604                         return -EINVAL;
2605                 if (put_user(0, &_xfern->result))
2606                         return -EFAULT;
2607                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2608                         return -EFAULT;
2609
2610                 bufs = memdup_user(xfern.bufs,
2611                                    sizeof(void *) * runtime->channels);
2612                 if (IS_ERR(bufs))
2613                         return PTR_ERR(bufs);
2614                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2615                 kfree(bufs);
2616                 __put_user(result, &_xfern->result);
2617                 return result < 0 ? result : 0;
2618         }
2619         case SNDRV_PCM_IOCTL_REWIND:
2620         {
2621                 snd_pcm_uframes_t frames;
2622                 snd_pcm_uframes_t __user *_frames = arg;
2623                 snd_pcm_sframes_t result;
2624                 if (get_user(frames, _frames))
2625                         return -EFAULT;
2626                 if (put_user(0, _frames))
2627                         return -EFAULT;
2628                 result = snd_pcm_playback_rewind(substream, frames);
2629                 __put_user(result, _frames);
2630                 return result < 0 ? result : 0;
2631         }
2632         case SNDRV_PCM_IOCTL_FORWARD:
2633         {
2634                 snd_pcm_uframes_t frames;
2635                 snd_pcm_uframes_t __user *_frames = arg;
2636                 snd_pcm_sframes_t result;
2637                 if (get_user(frames, _frames))
2638                         return -EFAULT;
2639                 if (put_user(0, _frames))
2640                         return -EFAULT;
2641                 result = snd_pcm_playback_forward(substream, frames);
2642                 __put_user(result, _frames);
2643                 return result < 0 ? result : 0;
2644         }
2645         }
2646         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2647 }
2648
2649 static int snd_pcm_capture_ioctl1(struct file *file,
2650                                   struct snd_pcm_substream *substream,
2651                                   unsigned int cmd, void __user *arg)
2652 {
2653         if (snd_BUG_ON(!substream))
2654                 return -ENXIO;
2655         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2656                 return -EINVAL;
2657         switch (cmd) {
2658         case SNDRV_PCM_IOCTL_READI_FRAMES:
2659         {
2660                 struct snd_xferi xferi;
2661                 struct snd_xferi __user *_xferi = arg;
2662                 struct snd_pcm_runtime *runtime = substream->runtime;
2663                 snd_pcm_sframes_t result;
2664                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2665                         return -EBADFD;
2666                 if (put_user(0, &_xferi->result))
2667                         return -EFAULT;
2668                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2669                         return -EFAULT;
2670                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2671                 __put_user(result, &_xferi->result);
2672                 return result < 0 ? result : 0;
2673         }
2674         case SNDRV_PCM_IOCTL_READN_FRAMES:
2675         {
2676                 struct snd_xfern xfern;
2677                 struct snd_xfern __user *_xfern = arg;
2678                 struct snd_pcm_runtime *runtime = substream->runtime;
2679                 void *bufs;
2680                 snd_pcm_sframes_t result;
2681                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2682                         return -EBADFD;
2683                 if (runtime->channels > 128)
2684                         return -EINVAL;
2685                 if (put_user(0, &_xfern->result))
2686                         return -EFAULT;
2687                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2688                         return -EFAULT;
2689
2690                 bufs = memdup_user(xfern.bufs,
2691                                    sizeof(void *) * runtime->channels);
2692                 if (IS_ERR(bufs))
2693                         return PTR_ERR(bufs);
2694                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2695                 kfree(bufs);
2696                 __put_user(result, &_xfern->result);
2697                 return result < 0 ? result : 0;
2698         }
2699         case SNDRV_PCM_IOCTL_REWIND:
2700         {
2701                 snd_pcm_uframes_t frames;
2702                 snd_pcm_uframes_t __user *_frames = arg;
2703                 snd_pcm_sframes_t result;
2704                 if (get_user(frames, _frames))
2705                         return -EFAULT;
2706                 if (put_user(0, _frames))
2707                         return -EFAULT;
2708                 result = snd_pcm_capture_rewind(substream, frames);
2709                 __put_user(result, _frames);
2710                 return result < 0 ? result : 0;
2711         }
2712         case SNDRV_PCM_IOCTL_FORWARD:
2713         {
2714                 snd_pcm_uframes_t frames;
2715                 snd_pcm_uframes_t __user *_frames = arg;
2716                 snd_pcm_sframes_t result;
2717                 if (get_user(frames, _frames))
2718                         return -EFAULT;
2719                 if (put_user(0, _frames))
2720                         return -EFAULT;
2721                 result = snd_pcm_capture_forward(substream, frames);
2722                 __put_user(result, _frames);
2723                 return result < 0 ? result : 0;
2724         }
2725         }
2726         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2727 }
2728
2729 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2730                                    unsigned long arg)
2731 {
2732         struct snd_pcm_file *pcm_file;
2733
2734         pcm_file = file->private_data;
2735
2736         if (((cmd >> 8) & 0xff) != 'A')
2737                 return -ENOTTY;
2738
2739         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2740                                        (void __user *)arg);
2741 }
2742
2743 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2744                                   unsigned long arg)
2745 {
2746         struct snd_pcm_file *pcm_file;
2747
2748         pcm_file = file->private_data;
2749
2750         if (((cmd >> 8) & 0xff) != 'A')
2751                 return -ENOTTY;
2752
2753         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2754                                       (void __user *)arg);
2755 }
2756
2757 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2758                          unsigned int cmd, void *arg)
2759 {
2760         mm_segment_t fs;
2761         int result;
2762
2763         fs = snd_enter_user();
2764         switch (substream->stream) {
2765         case SNDRV_PCM_STREAM_PLAYBACK:
2766                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2767                                                  (void __user *)arg);
2768                 break;
2769         case SNDRV_PCM_STREAM_CAPTURE:
2770                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2771                                                 (void __user *)arg);
2772                 break;
2773         default:
2774                 result = -EINVAL;
2775                 break;
2776         }
2777         snd_leave_user(fs);
2778         return result;
2779 }
2780
2781 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2782
2783 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2784                             loff_t * offset)
2785 {
2786         struct snd_pcm_file *pcm_file;
2787         struct snd_pcm_substream *substream;
2788         struct snd_pcm_runtime *runtime;
2789         snd_pcm_sframes_t result;
2790
2791         pcm_file = file->private_data;
2792         substream = pcm_file->substream;
2793         if (PCM_RUNTIME_CHECK(substream))
2794                 return -ENXIO;
2795         runtime = substream->runtime;
2796         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2797                 return -EBADFD;
2798         if (!frame_aligned(runtime, count))
2799                 return -EINVAL;
2800         count = bytes_to_frames(runtime, count);
2801         result = snd_pcm_lib_read(substream, buf, count);
2802         if (result > 0)
2803                 result = frames_to_bytes(runtime, result);
2804         return result;
2805 }
2806
2807 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2808                              size_t count, loff_t * offset)
2809 {
2810         struct snd_pcm_file *pcm_file;
2811         struct snd_pcm_substream *substream;
2812         struct snd_pcm_runtime *runtime;
2813         snd_pcm_sframes_t result;
2814
2815         pcm_file = file->private_data;
2816         substream = pcm_file->substream;
2817         if (PCM_RUNTIME_CHECK(substream))
2818                 return -ENXIO;
2819         runtime = substream->runtime;
2820         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2821                 return -EBADFD;
2822         if (!frame_aligned(runtime, count))
2823                 return -EINVAL;
2824         count = bytes_to_frames(runtime, count);
2825         result = snd_pcm_lib_write(substream, buf, count);
2826         if (result > 0)
2827                 result = frames_to_bytes(runtime, result);
2828         return result;
2829 }
2830
2831 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2832                              unsigned long nr_segs, loff_t pos)
2833
2834 {
2835         struct snd_pcm_file *pcm_file;
2836         struct snd_pcm_substream *substream;
2837         struct snd_pcm_runtime *runtime;
2838         snd_pcm_sframes_t result;
2839         unsigned long i;
2840         void __user **bufs;
2841         snd_pcm_uframes_t frames;
2842
2843         pcm_file = iocb->ki_filp->private_data;
2844         substream = pcm_file->substream;
2845         if (PCM_RUNTIME_CHECK(substream))
2846                 return -ENXIO;
2847         runtime = substream->runtime;
2848         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2849                 return -EBADFD;
2850         if (nr_segs > 1024 || nr_segs != runtime->channels)
2851                 return -EINVAL;
2852         if (!frame_aligned(runtime, iov->iov_len))
2853                 return -EINVAL;
2854         frames = bytes_to_samples(runtime, iov->iov_len);
2855         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2856         if (bufs == NULL)
2857                 return -ENOMEM;
2858         for (i = 0; i < nr_segs; ++i)
2859                 bufs[i] = iov[i].iov_base;
2860         result = snd_pcm_lib_readv(substream, bufs, frames);
2861         if (result > 0)
2862                 result = frames_to_bytes(runtime, result);
2863         kfree(bufs);
2864         return result;
2865 }
2866
2867 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2868                               unsigned long nr_segs, loff_t pos)
2869 {
2870         struct snd_pcm_file *pcm_file;
2871         struct snd_pcm_substream *substream;
2872         struct snd_pcm_runtime *runtime;
2873         snd_pcm_sframes_t result;
2874         unsigned long i;
2875         void __user **bufs;
2876         snd_pcm_uframes_t frames;
2877
2878         pcm_file = iocb->ki_filp->private_data;
2879         substream = pcm_file->substream;
2880         if (PCM_RUNTIME_CHECK(substream))
2881                 return -ENXIO;
2882         runtime = substream->runtime;
2883         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2884                 return -EBADFD;
2885         if (nr_segs > 128 || nr_segs != runtime->channels ||
2886             !frame_aligned(runtime, iov->iov_len))
2887                 return -EINVAL;
2888         frames = bytes_to_samples(runtime, iov->iov_len);
2889         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2890         if (bufs == NULL)
2891                 return -ENOMEM;
2892         for (i = 0; i < nr_segs; ++i)
2893                 bufs[i] = iov[i].iov_base;
2894         result = snd_pcm_lib_writev(substream, bufs, frames);
2895         if (result > 0)
2896                 result = frames_to_bytes(runtime, result);
2897         kfree(bufs);
2898         return result;
2899 }
2900
2901 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2902 {
2903         struct snd_pcm_file *pcm_file;
2904         struct snd_pcm_substream *substream;
2905         struct snd_pcm_runtime *runtime;
2906         unsigned int mask;
2907         snd_pcm_uframes_t avail;
2908
2909         pcm_file = file->private_data;
2910
2911         substream = pcm_file->substream;
2912         if (PCM_RUNTIME_CHECK(substream))
2913                 return -ENXIO;
2914         runtime = substream->runtime;
2915
2916         poll_wait(file, &runtime->sleep, wait);
2917
2918         snd_pcm_stream_lock_irq(substream);
2919         avail = snd_pcm_playback_avail(runtime);
2920         switch (runtime->status->state) {
2921         case SNDRV_PCM_STATE_RUNNING:
2922         case SNDRV_PCM_STATE_PREPARED:
2923         case SNDRV_PCM_STATE_PAUSED:
2924                 if (avail >= runtime->control->avail_min) {
2925                         mask = POLLOUT | POLLWRNORM;
2926                         break;
2927                 }
2928                 /* Fall through */
2929         case SNDRV_PCM_STATE_DRAINING:
2930                 mask = 0;
2931                 break;
2932         default:
2933                 mask = POLLOUT | POLLWRNORM | POLLERR;
2934                 break;
2935         }
2936         snd_pcm_stream_unlock_irq(substream);
2937         return mask;
2938 }
2939
2940 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2941 {
2942         struct snd_pcm_file *pcm_file;
2943         struct snd_pcm_substream *substream;
2944         struct snd_pcm_runtime *runtime;
2945         unsigned int mask;
2946         snd_pcm_uframes_t avail;
2947
2948         pcm_file = file->private_data;
2949
2950         substream = pcm_file->substream;
2951         if (PCM_RUNTIME_CHECK(substream))
2952                 return -ENXIO;
2953         runtime = substream->runtime;
2954
2955         poll_wait(file, &runtime->sleep, wait);
2956
2957         snd_pcm_stream_lock_irq(substream);
2958         avail = snd_pcm_capture_avail(runtime);
2959         switch (runtime->status->state) {
2960         case SNDRV_PCM_STATE_RUNNING:
2961         case SNDRV_PCM_STATE_PREPARED:
2962         case SNDRV_PCM_STATE_PAUSED:
2963                 if (avail >= runtime->control->avail_min) {
2964                         mask = POLLIN | POLLRDNORM;
2965                         break;
2966                 }
2967                 mask = 0;
2968                 break;
2969         case SNDRV_PCM_STATE_DRAINING:
2970                 if (avail > 0) {
2971                         mask = POLLIN | POLLRDNORM;
2972                         break;
2973                 }
2974                 /* Fall through */
2975         default:
2976                 mask = POLLIN | POLLRDNORM | POLLERR;
2977                 break;
2978         }
2979         snd_pcm_stream_unlock_irq(substream);
2980         return mask;
2981 }
2982
2983 /*
2984  * mmap support
2985  */
2986
2987 /*
2988  * Only on coherent architectures, we can mmap the status and the control records
2989  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
2990  */
2991 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2992 /*
2993  * mmap status record
2994  */
2995 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2996                                                 struct vm_fault *vmf)
2997 {
2998         struct snd_pcm_substream *substream = area->vm_private_data;
2999         struct snd_pcm_runtime *runtime;
3000
3001         if (substream == NULL)
3002                 return VM_FAULT_SIGBUS;
3003         runtime = substream->runtime;
3004         vmf->page = virt_to_page(runtime->status);
3005         get_page(vmf->page);
3006         return 0;
3007 }
3008
3009 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3010 {
3011         .fault =        snd_pcm_mmap_status_fault,
3012 };
3013
3014 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3015                                struct vm_area_struct *area)
3016 {
3017         long size;
3018         if (!(area->vm_flags & VM_READ))
3019                 return -EINVAL;
3020         size = area->vm_end - area->vm_start;
3021         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3022                 return -EINVAL;
3023         area->vm_ops = &snd_pcm_vm_ops_status;
3024         area->vm_private_data = substream;
3025         area->vm_flags |= VM_RESERVED;
3026         return 0;
3027 }
3028
3029 /*
3030  * mmap control record
3031  */
3032 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3033                                                 struct vm_fault *vmf)
3034 {
3035         struct snd_pcm_substream *substream = area->vm_private_data;
3036         struct snd_pcm_runtime *runtime;
3037
3038         if (substream == NULL)
3039                 return VM_FAULT_SIGBUS;
3040         runtime = substream->runtime;
3041         vmf->page = virt_to_page(runtime->control);
3042         get_page(vmf->page);
3043         return 0;
3044 }
3045
3046 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3047 {
3048         .fault =        snd_pcm_mmap_control_fault,
3049 };
3050
3051 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3052                                 struct vm_area_struct *area)
3053 {
3054         long size;
3055         if (!(area->vm_flags & VM_READ))
3056                 return -EINVAL;
3057         size = area->vm_end - area->vm_start;
3058         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3059                 return -EINVAL;
3060         area->vm_ops = &snd_pcm_vm_ops_control;
3061         area->vm_private_data = substream;
3062         area->vm_flags |= VM_RESERVED;
3063         return 0;
3064 }
3065 #else /* ! coherent mmap */
3066 /*
3067  * don't support mmap for status and control records.
3068  */
3069 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3070                                struct vm_area_struct *area)
3071 {
3072         return -ENXIO;
3073 }
3074 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3075                                 struct vm_area_struct *area)
3076 {
3077         return -ENXIO;
3078 }
3079 #endif /* coherent mmap */
3080
3081 static inline struct page *
3082 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3083 {
3084         void *vaddr = substream->runtime->dma_area + ofs;
3085 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3086         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3087                 return virt_to_page(CAC_ADDR(vaddr));
3088 #endif
3089 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3090         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3091                 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3092                 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3093                 /* assume dma_handle set via pfn_to_phys() in
3094                  * mm/dma-noncoherent.c
3095                  */
3096                 return pfn_to_page(addr >> PAGE_SHIFT);
3097         }
3098 #endif
3099         return virt_to_page(vaddr);
3100 }
3101
3102 /*
3103  * fault callback for mmapping a RAM page
3104  */
3105 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3106                                                 struct vm_fault *vmf)
3107 {
3108         struct snd_pcm_substream *substream = area->vm_private_data;
3109         struct snd_pcm_runtime *runtime;
3110         unsigned long offset;
3111         struct page * page;
3112         size_t dma_bytes;
3113
3114         if (substream == NULL)
3115                 return VM_FAULT_SIGBUS;
3116         runtime = substream->runtime;
3117         offset = vmf->pgoff << PAGE_SHIFT;
3118         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3119         if (offset > dma_bytes - PAGE_SIZE)
3120                 return VM_FAULT_SIGBUS;
3121         if (substream->ops->page)
3122                 page = substream->ops->page(substream, offset);
3123         else
3124                 page = snd_pcm_default_page_ops(substream, offset);
3125         if (!page)
3126                 return VM_FAULT_SIGBUS;
3127         get_page(page);
3128         vmf->page = page;
3129         return 0;
3130 }
3131
3132 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3133         .open =         snd_pcm_mmap_data_open,
3134         .close =        snd_pcm_mmap_data_close,
3135 };
3136
3137 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3138         .open =         snd_pcm_mmap_data_open,
3139         .close =        snd_pcm_mmap_data_close,
3140         .fault =        snd_pcm_mmap_data_fault,
3141 };
3142
3143 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3144 /* This should be defined / handled globally! */
3145 #ifdef CONFIG_ARM
3146 #define ARCH_HAS_DMA_MMAP_COHERENT
3147 #endif
3148 #endif
3149
3150 /*
3151  * mmap the DMA buffer on RAM
3152  */
3153 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3154                              struct vm_area_struct *area)
3155 {
3156         area->vm_flags |= VM_RESERVED;
3157 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3158         if (!substream->ops->page &&
3159             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3160                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3161                                          area,
3162                                          substream->runtime->dma_area,
3163                                          substream->runtime->dma_addr,
3164                                          area->vm_end - area->vm_start);
3165 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3166         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3167             !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3168                 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3169 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3170         /* mmap with fault handler */
3171         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3172         return 0;
3173 }
3174 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3175
3176 /*
3177  * mmap the DMA buffer on I/O memory area
3178  */
3179 #if SNDRV_PCM_INFO_MMAP_IOMEM
3180 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3181                            struct vm_area_struct *area)
3182 {
3183         long size;
3184         unsigned long offset;
3185
3186         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3187         area->vm_flags |= VM_IO;
3188         size = area->vm_end - area->vm_start;
3189         offset = area->vm_pgoff << PAGE_SHIFT;
3190         if (io_remap_pfn_range(area, area->vm_start,
3191                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3192                                 size, area->vm_page_prot))
3193                 return -EAGAIN;
3194         return 0;
3195 }
3196
3197 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3198 #endif /* SNDRV_PCM_INFO_MMAP */
3199
3200 /*
3201  * mmap DMA buffer
3202  */
3203 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3204                       struct vm_area_struct *area)
3205 {
3206         struct snd_pcm_runtime *runtime;
3207         long size;
3208         unsigned long offset;
3209         size_t dma_bytes;
3210         int err;
3211
3212         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3213                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3214                         return -EINVAL;
3215         } else {
3216                 if (!(area->vm_flags & VM_READ))
3217                         return -EINVAL;
3218         }
3219         runtime = substream->runtime;
3220         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3221                 return -EBADFD;
3222         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3223                 return -ENXIO;
3224         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3225             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3226                 return -EINVAL;
3227         size = area->vm_end - area->vm_start;
3228         offset = area->vm_pgoff << PAGE_SHIFT;
3229         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3230         if ((size_t)size > dma_bytes)
3231                 return -EINVAL;
3232         if (offset > dma_bytes - size)
3233                 return -EINVAL;
3234
3235         area->vm_ops = &snd_pcm_vm_ops_data;
3236         area->vm_private_data = substream;
3237         if (substream->ops->mmap)
3238                 err = substream->ops->mmap(substream, area);
3239         else
3240                 err = snd_pcm_lib_default_mmap(substream, area);
3241         if (!err)
3242                 atomic_inc(&substream->mmap_count);
3243         return err;
3244 }
3245
3246 EXPORT_SYMBOL(snd_pcm_mmap_data);
3247
3248 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3249 {
3250         struct snd_pcm_file * pcm_file;
3251         struct snd_pcm_substream *substream;
3252         unsigned long offset;
3253
3254         pcm_file = file->private_data;
3255         substream = pcm_file->substream;
3256         if (PCM_RUNTIME_CHECK(substream))
3257                 return -ENXIO;
3258
3259         offset = area->vm_pgoff << PAGE_SHIFT;
3260         switch (offset) {
3261         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3262                 if (pcm_file->no_compat_mmap)
3263                         return -ENXIO;
3264                 return snd_pcm_mmap_status(substream, file, area);
3265         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3266                 if (pcm_file->no_compat_mmap)
3267                         return -ENXIO;
3268                 return snd_pcm_mmap_control(substream, file, area);
3269         default:
3270                 return snd_pcm_mmap_data(substream, file, area);
3271         }
3272         return 0;
3273 }
3274
3275 static int snd_pcm_fasync(int fd, struct file * file, int on)
3276 {
3277         struct snd_pcm_file * pcm_file;
3278         struct snd_pcm_substream *substream;
3279         struct snd_pcm_runtime *runtime;
3280
3281         pcm_file = file->private_data;
3282         substream = pcm_file->substream;
3283         if (PCM_RUNTIME_CHECK(substream))
3284                 return -ENXIO;
3285         runtime = substream->runtime;
3286         return fasync_helper(fd, file, on, &runtime->fasync);
3287 }
3288
3289 /*
3290  * ioctl32 compat
3291  */
3292 #ifdef CONFIG_COMPAT
3293 #include "pcm_compat.c"
3294 #else
3295 #define snd_pcm_ioctl_compat    NULL
3296 #endif
3297
3298 /*
3299  *  To be removed helpers to keep binary compatibility
3300  */
3301
3302 #ifdef CONFIG_SND_SUPPORT_OLD_API
3303 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3304 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3305
3306 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3307                                                struct snd_pcm_hw_params_old *oparams)
3308 {
3309         unsigned int i;
3310
3311         memset(params, 0, sizeof(*params));
3312         params->flags = oparams->flags;
3313         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3314                 params->masks[i].bits[0] = oparams->masks[i];
3315         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3316         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3317         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3318         params->info = oparams->info;
3319         params->msbits = oparams->msbits;
3320         params->rate_num = oparams->rate_num;
3321         params->rate_den = oparams->rate_den;
3322         params->fifo_size = oparams->fifo_size;
3323 }
3324
3325 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3326                                              struct snd_pcm_hw_params *params)
3327 {
3328         unsigned int i;
3329
3330         memset(oparams, 0, sizeof(*oparams));
3331         oparams->flags = params->flags;
3332         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3333                 oparams->masks[i] = params->masks[i].bits[0];
3334         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3335         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3336         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3337         oparams->info = params->info;
3338         oparams->msbits = params->msbits;
3339         oparams->rate_num = params->rate_num;
3340         oparams->rate_den = params->rate_den;
3341         oparams->fifo_size = params->fifo_size;
3342 }
3343
3344 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3345                                       struct snd_pcm_hw_params_old __user * _oparams)
3346 {
3347         struct snd_pcm_hw_params *params;
3348         struct snd_pcm_hw_params_old *oparams = NULL;
3349         int err;
3350
3351         params = kmalloc(sizeof(*params), GFP_KERNEL);
3352         if (!params)
3353                 return -ENOMEM;
3354
3355         oparams = memdup_user(_oparams, sizeof(*oparams));
3356         if (IS_ERR(oparams)) {
3357                 err = PTR_ERR(oparams);
3358                 goto out;
3359         }
3360         snd_pcm_hw_convert_from_old_params(params, oparams);
3361         err = snd_pcm_hw_refine(substream, params);
3362         snd_pcm_hw_convert_to_old_params(oparams, params);
3363         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3364                 if (!err)
3365                         err = -EFAULT;
3366         }
3367
3368         kfree(oparams);
3369 out:
3370         kfree(params);
3371         return err;
3372 }
3373
3374 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3375                                       struct snd_pcm_hw_params_old __user * _oparams)
3376 {
3377         struct snd_pcm_hw_params *params;
3378         struct snd_pcm_hw_params_old *oparams = NULL;
3379         int err;
3380
3381         params = kmalloc(sizeof(*params), GFP_KERNEL);
3382         if (!params)
3383                 return -ENOMEM;
3384
3385         oparams = memdup_user(_oparams, sizeof(*oparams));
3386         if (IS_ERR(oparams)) {
3387                 err = PTR_ERR(oparams);
3388                 goto out;
3389         }
3390         snd_pcm_hw_convert_from_old_params(params, oparams);
3391         err = snd_pcm_hw_params(substream, params);
3392         snd_pcm_hw_convert_to_old_params(oparams, params);
3393         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3394                 if (!err)
3395                         err = -EFAULT;
3396         }
3397
3398         kfree(oparams);
3399 out:
3400         kfree(params);
3401         return err;
3402 }
3403 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3404
3405 #ifndef CONFIG_MMU
3406 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3407                                                unsigned long addr,
3408                                                unsigned long len,
3409                                                unsigned long pgoff,
3410                                                unsigned long flags)
3411 {
3412         struct snd_pcm_file *pcm_file = file->private_data;
3413         struct snd_pcm_substream *substream = pcm_file->substream;
3414         struct snd_pcm_runtime *runtime = substream->runtime;
3415         unsigned long offset = pgoff << PAGE_SHIFT;
3416
3417         switch (offset) {
3418         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3419                 return (unsigned long)runtime->status;
3420         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3421                 return (unsigned long)runtime->control;
3422         default:
3423                 return (unsigned long)runtime->dma_area + offset;
3424         }
3425 }
3426 #else
3427 # define snd_pcm_get_unmapped_area NULL
3428 #endif
3429
3430 /*
3431  *  Register section
3432  */
3433
3434 const struct file_operations snd_pcm_f_ops[2] = {
3435         {
3436                 .owner =                THIS_MODULE,
3437                 .write =                snd_pcm_write,
3438                 .aio_write =            snd_pcm_aio_write,
3439                 .open =                 snd_pcm_playback_open,
3440                 .release =              snd_pcm_release,
3441                 .llseek =               no_llseek,
3442                 .poll =                 snd_pcm_playback_poll,
3443                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3444                 .compat_ioctl =         snd_pcm_ioctl_compat,
3445                 .mmap =                 snd_pcm_mmap,
3446                 .fasync =               snd_pcm_fasync,
3447                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3448         },
3449         {
3450                 .owner =                THIS_MODULE,
3451                 .read =                 snd_pcm_read,
3452                 .aio_read =             snd_pcm_aio_read,
3453                 .open =                 snd_pcm_capture_open,
3454                 .release =              snd_pcm_release,
3455                 .llseek =               no_llseek,
3456                 .poll =                 snd_pcm_capture_poll,
3457                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3458                 .compat_ioctl =         snd_pcm_ioctl_compat,
3459                 .mmap =                 snd_pcm_mmap,
3460                 .fasync =               snd_pcm_fasync,
3461                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3462         }
3463 };