sound/core/pcm_native.c

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