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