git.oblomov.eu Git - linux-2.6/blob - sound/core/pcm_native.c

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