sound/core/pcm_native.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include <linux/mm.h>
  23 #include <linux/module.h>
  24 #include <linux/file.h>
  25 #include <linux/slab.h>
  26 #include <linux/time.h>
  27 #include <linux/pm_qos.h>
  28 #include <linux/uio.h>
  29 #include <linux/dma-mapping.h>
  30 #include <sound/core.h>
  31 #include <sound/control.h>
  32 #include <sound/info.h>
  33 #include <sound/pcm.h>
  34 #include <sound/pcm_params.h>
  35 #include <sound/timer.h>
  36 #include <sound/minors.h>
  37 #include <asm/io.h>
  38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
  39 #include <dma-coherence.h>
  40 #endif
  41
  42 /*
  43  *  Compatibility
  44  */
  45
  46 struct snd_pcm_hw_params_old {
  47         unsigned int flags;
  48         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
  49                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
  50         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
  51                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
  52         unsigned int rmask;
  53         unsigned int cmask;
  54         unsigned int info;
  55         unsigned int msbits;
  56         unsigned int rate_num;
  57         unsigned int rate_den;
  58         snd_pcm_uframes_t fifo_size;
  59         unsigned char reserved[64];
  60 };
  61
  62 #ifdef CONFIG_SND_SUPPORT_OLD_API
  63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
  64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
  65
  66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
  67                                       struct snd_pcm_hw_params_old __user * _oparams);
  68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
  69                                       struct snd_pcm_hw_params_old __user * _oparams);
  70 #endif
  71 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
  72
  73 /*
  74  *
  75  */
  76
  77 DEFINE_RWLOCK(snd_pcm_link_rwlock);
  78 EXPORT_SYMBOL(snd_pcm_link_rwlock);
  79
  80 static DECLARE_RWSEM(snd_pcm_link_rwsem);
  81
  82 static inline mm_segment_t snd_enter_user(void)
  83 {
  84         mm_segment_t fs = get_fs();
  85         set_fs(get_ds());
  86         return fs;
  87 }
  88
  89 static inline void snd_leave_user(mm_segment_t fs)
  90 {
  91         set_fs(fs);
  92 }
  93
  94
  95
  96 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
  97 {
  98         struct snd_pcm_runtime *runtime;
  99         struct snd_pcm *pcm = substream->pcm;
 100         struct snd_pcm_str *pstr = substream->pstr;
 101
 102         memset(info, 0, sizeof(*info));
 103         info->card = pcm->card->number;
 104         info->device = pcm->device;
 105         info->stream = substream->stream;
 106         info->subdevice = substream->number;
 107         strlcpy(info->id, pcm->id, sizeof(info->id));
 108         strlcpy(info->name, pcm->name, sizeof(info->name));
 109         info->dev_class = pcm->dev_class;
 110         info->dev_subclass = pcm->dev_subclass;
 111         info->subdevices_count = pstr->substream_count;
 112         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 113         strlcpy(info->subname, substream->name, sizeof(info->subname));
 114         runtime = substream->runtime;
 115         /* AB: FIXME!!! This is definitely nonsense */
 116         if (runtime) {
 117                 info->sync = runtime->sync;
 118                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
 119         }
 120         return 0;
 121 }
 122
 123 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 124                       struct snd_pcm_info __user * _info)
 125 {
 126         struct snd_pcm_info *info;
 127         int err;
 128
 129         info = kmalloc(sizeof(*info), GFP_KERNEL);
 130         if (! info)
 131                 return -ENOMEM;
 132         err = snd_pcm_info(substream, info);
 133         if (err >= 0) {
 134                 if (copy_to_user(_info, info, sizeof(*info)))
 135                         err = -EFAULT;
 136         }
 137         kfree(info);
 138         return err;
 139 }
 140
 141 #undef RULES_DEBUG
 142
 143 #ifdef RULES_DEBUG
 144 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
 145 static const char * const snd_pcm_hw_param_names[] = {
 146         HW_PARAM(ACCESS),
 147         HW_PARAM(FORMAT),
 148         HW_PARAM(SUBFORMAT),
 149         HW_PARAM(SAMPLE_BITS),
 150         HW_PARAM(FRAME_BITS),
 151         HW_PARAM(CHANNELS),
 152         HW_PARAM(RATE),
 153         HW_PARAM(PERIOD_TIME),
 154         HW_PARAM(PERIOD_SIZE),
 155         HW_PARAM(PERIOD_BYTES),
 156         HW_PARAM(PERIODS),
 157         HW_PARAM(BUFFER_TIME),
 158         HW_PARAM(BUFFER_SIZE),
 159         HW_PARAM(BUFFER_BYTES),
 160         HW_PARAM(TICK_TIME),
 161 };
 162 #endif
 163
 164 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
 165                       struct snd_pcm_hw_params *params)
 166 {
 167         unsigned int k;
 168         struct snd_pcm_hardware *hw;
 169         struct snd_interval *i = NULL;
 170         struct snd_mask *m = NULL;
 171         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
 172         unsigned int rstamps[constrs->rules_num];
 173         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 174         unsigned int stamp = 2;
 175         int changed, again;
 176
 177         params->info = 0;
 178         params->fifo_size = 0;
 179         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
 180                 params->msbits = 0;
 181         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
 182                 params->rate_num = 0;
 183                 params->rate_den = 0;
 184         }
 185
 186         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
 187                 m = hw_param_mask(params, k);
 188                 if (snd_mask_empty(m))
 189                         return -EINVAL;
 190                 if (!(params->rmask & (1 << k)))
 191                         continue;
 192 #ifdef RULES_DEBUG
 193                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 194                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 195 #endif
 196                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
 197 #ifdef RULES_DEBUG
 198                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 199 #endif
 200                 if (changed)
 201                         params->cmask |= 1 << k;
 202                 if (changed < 0)
 203                         return changed;
 204         }
 205
 206         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
 207                 i = hw_param_interval(params, k);
 208                 if (snd_interval_empty(i))
 209                         return -EINVAL;
 210                 if (!(params->rmask & (1 << k)))
 211                         continue;
 212 #ifdef RULES_DEBUG
 213                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 214                 if (i->empty)
 215                         printk("empty");
 216                 else
 217                         printk("%c%u %u%c",
 218                                i->openmin ? '(' : '[', i->min,
 219                                i->max, i->openmax ? ')' : ']');
 220                 printk(" -> ");
 221 #endif
 222                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
 223 #ifdef RULES_DEBUG
 224                 if (i->empty)
 225                         printk("empty\n");
 226                 else
 227                         printk("%c%u %u%c\n",
 228                                i->openmin ? '(' : '[', i->min,
 229                                i->max, i->openmax ? ')' : ']');
 230 #endif
 231                 if (changed)
 232                         params->cmask |= 1 << k;
 233                 if (changed < 0)
 234                         return changed;
 235         }
 236
 237         for (k = 0; k < constrs->rules_num; k++)
 238                 rstamps[k] = 0;
 239         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
 240                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
 241         do {
 242                 again = 0;
 243                 for (k = 0; k < constrs->rules_num; k++) {
 244                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
 245                         unsigned int d;
 246                         int doit = 0;
 247                         if (r->cond && !(r->cond & params->flags))
 248                                 continue;
 249                         for (d = 0; r->deps[d] >= 0; d++) {
 250                                 if (vstamps[r->deps[d]] > rstamps[k]) {
 251                                         doit = 1;
 252                                         break;
 253                                 }
 254                         }
 255                         if (!doit)
 256                                 continue;
 257 #ifdef RULES_DEBUG
 258                         printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
 259                         if (r->var >= 0) {
 260                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
 261                                 if (hw_is_mask(r->var)) {
 262                                         m = hw_param_mask(params, r->var);
 263                                         printk("%x", *m->bits);
 264                                 } else {
 265                                         i = hw_param_interval(params, r->var);
 266                                         if (i->empty)
 267                                                 printk("empty");
 268                                         else
 269                                                 printk("%c%u %u%c",
 270                                                        i->openmin ? '(' : '[', i->min,
 271                                                        i->max, i->openmax ? ')' : ']');
 272                                 }
 273                         }
 274 #endif
 275                         changed = r->func(params, r);
 276 #ifdef RULES_DEBUG
 277                         if (r->var >= 0) {
 278                                 printk(" -> ");
 279                                 if (hw_is_mask(r->var))
 280                                         printk("%x", *m->bits);
 281                                 else {
 282                                         if (i->empty)
 283                                                 printk("empty");
 284                                         else
 285                                                 printk("%c%u %u%c",
 286                                                        i->openmin ? '(' : '[', i->min,
 287                                                        i->max, i->openmax ? ')' : ']');
 288                                 }
 289                         }
 290                         printk("\n");
 291 #endif
 292                         rstamps[k] = stamp;
 293                         if (changed && r->var >= 0) {
 294                                 params->cmask |= (1 << r->var);
 295                                 vstamps[r->var] = stamp;
 296                                 again = 1;
 297                         }
 298                         if (changed < 0)
 299                                 return changed;
 300                         stamp++;
 301                 }
 302         } while (again);
 303         if (!params->msbits) {
 304                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
 305                 if (snd_interval_single(i))
 306                         params->msbits = snd_interval_value(i);
 307         }
 308
 309         if (!params->rate_den) {
 310                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 311                 if (snd_interval_single(i)) {
 312                         params->rate_num = snd_interval_value(i);
 313                         params->rate_den = 1;
 314                 }
 315         }
 316
 317         hw = &substream->runtime->hw;
 318         if (!params->info)
 319                 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
 320         if (!params->fifo_size) {
 321                 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 322                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 323                 if (snd_mask_min(m) == snd_mask_max(m) &&
 324                     snd_interval_min(i) == snd_interval_max(i)) {
 325                         changed = substream->ops->ioctl(substream,
 326                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
 327                         if (changed < 0)
 328                                 return changed;
 329                 }
 330         }
 331         params->rmask = 0;
 332         return 0;
 333 }
 334
 335 EXPORT_SYMBOL(snd_pcm_hw_refine);
 336
 337 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 338                                   struct snd_pcm_hw_params __user * _params)
 339 {
 340         struct snd_pcm_hw_params *params;
 341         int err;
 342
 343         params = memdup_user(_params, sizeof(*params));
 344         if (IS_ERR(params))
 345                 return PTR_ERR(params);
 346
 347         err = snd_pcm_hw_refine(substream, params);
 348         if (copy_to_user(_params, params, sizeof(*params))) {
 349                 if (!err)
 350                         err = -EFAULT;
 351         }
 352
 353         kfree(params);
 354         return err;
 355 }
 356
 357 static int period_to_usecs(struct snd_pcm_runtime *runtime)
 358 {
 359         int usecs;
 360
 361         if (! runtime->rate)
 362                 return -1; /* invalid */
 363
 364         /* take 75% of period time as the deadline */
 365         usecs = (750000 / runtime->rate) * runtime->period_size;
 366         usecs += ((750000 % runtime->rate) * runtime->period_size) /
 367                 runtime->rate;
 368
 369         return usecs;
 370 }
 371
 372 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
 373 {
 374         snd_pcm_stream_lock_irq(substream);
 375         if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
 376                 substream->runtime->status->state = state;
 377         snd_pcm_stream_unlock_irq(substream);
 378 }
 379
 380 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 381                              struct snd_pcm_hw_params *params)
 382 {
 383         struct snd_pcm_runtime *runtime;
 384         int err, usecs;
 385         unsigned int bits;
 386         snd_pcm_uframes_t frames;
 387
 388         if (PCM_RUNTIME_CHECK(substream))
 389                 return -ENXIO;
 390         runtime = substream->runtime;
 391         snd_pcm_stream_lock_irq(substream);
 392         switch (runtime->status->state) {
 393         case SNDRV_PCM_STATE_OPEN:
 394         case SNDRV_PCM_STATE_SETUP:
 395         case SNDRV_PCM_STATE_PREPARED:
 396                 break;
 397         default:
 398                 snd_pcm_stream_unlock_irq(substream);
 399                 return -EBADFD;
 400         }
 401         snd_pcm_stream_unlock_irq(substream);
 402 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 403         if (!substream->oss.oss)
 404 #endif
 405                 if (atomic_read(&substream->mmap_count))
 406                         return -EBADFD;
 407
 408         params->rmask = ~0U;
 409         err = snd_pcm_hw_refine(substream, params);
 410         if (err < 0)
 411                 goto _error;
 412
 413         err = snd_pcm_hw_params_choose(substream, params);
 414         if (err < 0)
 415                 goto _error;
 416
 417         if (substream->ops->hw_params != NULL) {
 418                 err = substream->ops->hw_params(substream, params);
 419                 if (err < 0)
 420                         goto _error;
 421         }
 422
 423         runtime->access = params_access(params);
 424         runtime->format = params_format(params);
 425         runtime->subformat = params_subformat(params);
 426         runtime->channels = params_channels(params);
 427         runtime->rate = params_rate(params);
 428         runtime->period_size = params_period_size(params);
 429         runtime->periods = params_periods(params);
 430         runtime->buffer_size = params_buffer_size(params);
 431         runtime->info = params->info;
 432         runtime->rate_num = params->rate_num;
 433         runtime->rate_den = params->rate_den;
 434         runtime->no_period_wakeup =
 435                         (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
 436                         (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
 437
 438         bits = snd_pcm_format_physical_width(runtime->format);
 439         runtime->sample_bits = bits;
 440         bits *= runtime->channels;
 441         runtime->frame_bits = bits;
 442         frames = 1;
 443         while (bits % 8 != 0) {
 444                 bits *= 2;
 445                 frames *= 2;
 446         }
 447         runtime->byte_align = bits / 8;
 448         runtime->min_align = frames;
 449
 450         /* Default sw params */
 451         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 452         runtime->period_step = 1;
 453         runtime->control->avail_min = runtime->period_size;
 454         runtime->start_threshold = 1;
 455         runtime->stop_threshold = runtime->buffer_size;
 456         runtime->silence_threshold = 0;
 457         runtime->silence_size = 0;
 458         runtime->boundary = runtime->buffer_size;
 459         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 460                 runtime->boundary *= 2;
 461
 462         snd_pcm_timer_resolution_change(substream);
 463         snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
 464
 465         if (pm_qos_request_active(&substream->latency_pm_qos_req))
 466                 pm_qos_remove_request(&substream->latency_pm_qos_req);
 467         if ((usecs = period_to_usecs(runtime)) >= 0)
 468                 pm_qos_add_request(&substream->latency_pm_qos_req,
 469                                    PM_QOS_CPU_DMA_LATENCY, usecs);
 470         return 0;
 471  _error:
 472         /* hardware might be unusable from this time,
 473            so we force application to retry to set
 474            the correct hardware parameter settings */
 475         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
 476         if (substream->ops->hw_free != NULL)
 477                 substream->ops->hw_free(substream);
 478         return err;
 479 }
 480
 481 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 482                                   struct snd_pcm_hw_params __user * _params)
 483 {
 484         struct snd_pcm_hw_params *params;
 485         int err;
 486
 487         params = memdup_user(_params, sizeof(*params));
 488         if (IS_ERR(params))
 489                 return PTR_ERR(params);
 490
 491         err = snd_pcm_hw_params(substream, params);
 492         if (copy_to_user(_params, params, sizeof(*params))) {
 493                 if (!err)
 494                         err = -EFAULT;
 495         }
 496
 497         kfree(params);
 498         return err;
 499 }
 500
 501 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 502 {
 503         struct snd_pcm_runtime *runtime;
 504         int result = 0;
 505
 506         if (PCM_RUNTIME_CHECK(substream))
 507                 return -ENXIO;
 508         runtime = substream->runtime;
 509         snd_pcm_stream_lock_irq(substream);
 510         switch (runtime->status->state) {
 511         case SNDRV_PCM_STATE_SETUP:
 512         case SNDRV_PCM_STATE_PREPARED:
 513                 break;
 514         default:
 515                 snd_pcm_stream_unlock_irq(substream);
 516                 return -EBADFD;
 517         }
 518         snd_pcm_stream_unlock_irq(substream);
 519         if (atomic_read(&substream->mmap_count))
 520                 return -EBADFD;
 521         if (substream->ops->hw_free)
 522                 result = substream->ops->hw_free(substream);
 523         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
 524         pm_qos_remove_request(&substream->latency_pm_qos_req);
 525         return result;
 526 }
 527
 528 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 529                              struct snd_pcm_sw_params *params)
 530 {
 531         struct snd_pcm_runtime *runtime;
 532         int err;
 533
 534         if (PCM_RUNTIME_CHECK(substream))
 535                 return -ENXIO;
 536         runtime = substream->runtime;
 537         snd_pcm_stream_lock_irq(substream);
 538         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 539                 snd_pcm_stream_unlock_irq(substream);
 540                 return -EBADFD;
 541         }
 542         snd_pcm_stream_unlock_irq(substream);
 543
 544         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 545                 return -EINVAL;
 546         if (params->avail_min == 0)
 547                 return -EINVAL;
 548         if (params->silence_size >= runtime->boundary) {
 549                 if (params->silence_threshold != 0)
 550                         return -EINVAL;
 551         } else {
 552                 if (params->silence_size > params->silence_threshold)
 553                         return -EINVAL;
 554                 if (params->silence_threshold > runtime->buffer_size)
 555                         return -EINVAL;
 556         }
 557         err = 0;
 558         snd_pcm_stream_lock_irq(substream);
 559         runtime->tstamp_mode = params->tstamp_mode;
 560         runtime->period_step = params->period_step;
 561         runtime->control->avail_min = params->avail_min;
 562         runtime->start_threshold = params->start_threshold;
 563         runtime->stop_threshold = params->stop_threshold;
 564         runtime->silence_threshold = params->silence_threshold;
 565         runtime->silence_size = params->silence_size;
 566         params->boundary = runtime->boundary;
 567         if (snd_pcm_running(substream)) {
 568                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 569                     runtime->silence_size > 0)
 570                         snd_pcm_playback_silence(substream, ULONG_MAX);
 571                 err = snd_pcm_update_state(substream, runtime);
 572         }
 573         snd_pcm_stream_unlock_irq(substream);
 574         return err;
 575 }
 576
 577 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 578                                   struct snd_pcm_sw_params __user * _params)
 579 {
 580         struct snd_pcm_sw_params params;
 581         int err;
 582         if (copy_from_user(&params, _params, sizeof(params)))
 583                 return -EFAULT;
 584         err = snd_pcm_sw_params(substream, &params);
 585         if (copy_to_user(_params, &params, sizeof(params)))
 586                 return -EFAULT;
 587         return err;
 588 }
 589
 590 int snd_pcm_status(struct snd_pcm_substream *substream,
 591                    struct snd_pcm_status *status)
 592 {
 593         struct snd_pcm_runtime *runtime = substream->runtime;
 594
 595         snd_pcm_stream_lock_irq(substream);
 596         status->state = runtime->status->state;
 597         status->suspended_state = runtime->status->suspended_state;
 598         if (status->state == SNDRV_PCM_STATE_OPEN)
 599                 goto _end;
 600         status->trigger_tstamp = runtime->trigger_tstamp;
 601         if (snd_pcm_running(substream)) {
 602                 snd_pcm_update_hw_ptr(substream);
 603                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
 604                         status->tstamp = runtime->status->tstamp;
 605                         goto _tstamp_end;
 606                 }
 607         }
 608         snd_pcm_gettime(runtime, &status->tstamp);
 609  _tstamp_end:
 610         status->appl_ptr = runtime->control->appl_ptr;
 611         status->hw_ptr = runtime->status->hw_ptr;
 612         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 613                 status->avail = snd_pcm_playback_avail(runtime);
 614                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 615                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 616                         status->delay = runtime->buffer_size - status->avail;
 617                         status->delay += runtime->delay;
 618                 } else
 619                         status->delay = 0;
 620         } else {
 621                 status->avail = snd_pcm_capture_avail(runtime);
 622                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 623                         status->delay = status->avail + runtime->delay;
 624                 else
 625                         status->delay = 0;
 626         }
 627         status->avail_max = runtime->avail_max;
 628         status->overrange = runtime->overrange;
 629         runtime->avail_max = 0;
 630         runtime->overrange = 0;
 631  _end:
 632         snd_pcm_stream_unlock_irq(substream);
 633         return 0;
 634 }
 635
 636 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 637                                struct snd_pcm_status __user * _status)
 638 {
 639         struct snd_pcm_status status;
 640         int res;
 641
 642         memset(&status, 0, sizeof(status));
 643         res = snd_pcm_status(substream, &status);
 644         if (res < 0)
 645                 return res;
 646         if (copy_to_user(_status, &status, sizeof(status)))
 647                 return -EFAULT;
 648         return 0;
 649 }
 650
 651 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 652                                 struct snd_pcm_channel_info * info)
 653 {
 654         struct snd_pcm_runtime *runtime;
 655         unsigned int channel;
 656
 657         channel = info->channel;
 658         runtime = substream->runtime;
 659         snd_pcm_stream_lock_irq(substream);
 660         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 661                 snd_pcm_stream_unlock_irq(substream);
 662                 return -EBADFD;
 663         }
 664         snd_pcm_stream_unlock_irq(substream);
 665         if (channel >= runtime->channels)
 666                 return -EINVAL;
 667         memset(info, 0, sizeof(*info));
 668         info->channel = channel;
 669         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 670 }
 671
 672 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 673                                      struct snd_pcm_channel_info __user * _info)
 674 {
 675         struct snd_pcm_channel_info info;
 676         int res;
 677
 678         if (copy_from_user(&info, _info, sizeof(info)))
 679                 return -EFAULT;
 680         res = snd_pcm_channel_info(substream, &info);
 681         if (res < 0)
 682                 return res;
 683         if (copy_to_user(_info, &info, sizeof(info)))
 684                 return -EFAULT;
 685         return 0;
 686 }
 687
 688 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 689 {
 690         struct snd_pcm_runtime *runtime = substream->runtime;
 691         if (runtime->trigger_master == NULL)
 692                 return;
 693         if (runtime->trigger_master == substream) {
 694                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
 695         } else {
 696                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 697                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 698         }
 699         runtime->trigger_master = NULL;
 700 }
 701
 702 struct action_ops {
 703         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 704         int (*do_action)(struct snd_pcm_substream *substream, int state);
 705         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 706         void (*post_action)(struct snd_pcm_substream *substream, int state);
 707 };
 708
 709 /*
 710  *  this functions is core for handling of linked stream
 711  *  Note: the stream state might be changed also on failure
 712  *  Note2: call with calling stream lock + link lock
 713  */
 714 static int snd_pcm_action_group(struct action_ops *ops,
 715                                 struct snd_pcm_substream *substream,
 716                                 int state, int do_lock)
 717 {
 718         struct snd_pcm_substream *s = NULL;
 719         struct snd_pcm_substream *s1;
 720         int res = 0;
 721
 722         snd_pcm_group_for_each_entry(s, substream) {
 723                 if (do_lock && s != substream)
 724                         spin_lock_nested(&s->self_group.lock,
 725                                          SINGLE_DEPTH_NESTING);
 726                 res = ops->pre_action(s, state);
 727                 if (res < 0)
 728                         goto _unlock;
 729         }
 730         snd_pcm_group_for_each_entry(s, substream) {
 731                 res = ops->do_action(s, state);
 732                 if (res < 0) {
 733                         if (ops->undo_action) {
 734                                 snd_pcm_group_for_each_entry(s1, substream) {
 735                                         if (s1 == s) /* failed stream */
 736                                                 break;
 737                                         ops->undo_action(s1, state);
 738                                 }
 739                         }
 740                         s = NULL; /* unlock all */
 741                         goto _unlock;
 742                 }
 743         }
 744         snd_pcm_group_for_each_entry(s, substream) {
 745                 ops->post_action(s, state);
 746         }
 747  _unlock:
 748         if (do_lock) {
 749                 /* unlock streams */
 750                 snd_pcm_group_for_each_entry(s1, substream) {
 751                         if (s1 != substream)
 752                                 spin_unlock(&s1->self_group.lock);
 753                         if (s1 == s)    /* end */
 754                                 break;
 755                 }
 756         }
 757         return res;
 758 }
 759
 760 /*
 761  *  Note: call with stream lock
 762  */
 763 static int snd_pcm_action_single(struct action_ops *ops,
 764                                  struct snd_pcm_substream *substream,
 765                                  int state)
 766 {
 767         int res;
 768
 769         res = ops->pre_action(substream, state);
 770         if (res < 0)
 771                 return res;
 772         res = ops->do_action(substream, state);
 773         if (res == 0)
 774                 ops->post_action(substream, state);
 775         else if (ops->undo_action)
 776                 ops->undo_action(substream, state);
 777         return res;
 778 }
 779
 780 /*
 781  *  Note: call with stream lock
 782  */
 783 static int snd_pcm_action(struct action_ops *ops,
 784                           struct snd_pcm_substream *substream,
 785                           int state)
 786 {
 787         int res;
 788
 789         if (snd_pcm_stream_linked(substream)) {
 790                 if (!spin_trylock(&substream->group->lock)) {
 791                         spin_unlock(&substream->self_group.lock);
 792                         spin_lock(&substream->group->lock);
 793                         spin_lock(&substream->self_group.lock);
 794                 }
 795                 res = snd_pcm_action_group(ops, substream, state, 1);
 796                 spin_unlock(&substream->group->lock);
 797         } else {
 798                 res = snd_pcm_action_single(ops, substream, state);
 799         }
 800         return res;
 801 }
 802
 803 /*
 804  *  Note: don't use any locks before
 805  */
 806 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 807                                    struct snd_pcm_substream *substream,
 808                                    int state)
 809 {
 810         int res;
 811
 812         read_lock_irq(&snd_pcm_link_rwlock);
 813         if (snd_pcm_stream_linked(substream)) {
 814                 spin_lock(&substream->group->lock);
 815                 spin_lock(&substream->self_group.lock);
 816                 res = snd_pcm_action_group(ops, substream, state, 1);
 817                 spin_unlock(&substream->self_group.lock);
 818                 spin_unlock(&substream->group->lock);
 819         } else {
 820                 spin_lock(&substream->self_group.lock);
 821                 res = snd_pcm_action_single(ops, substream, state);
 822                 spin_unlock(&substream->self_group.lock);
 823         }
 824         read_unlock_irq(&snd_pcm_link_rwlock);
 825         return res;
 826 }
 827
 828 /*
 829  */
 830 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 831                                     struct snd_pcm_substream *substream,
 832                                     int state)
 833 {
 834         int res;
 835
 836         down_read(&snd_pcm_link_rwsem);
 837         if (snd_pcm_stream_linked(substream))
 838                 res = snd_pcm_action_group(ops, substream, state, 0);
 839         else
 840                 res = snd_pcm_action_single(ops, substream, state);
 841         up_read(&snd_pcm_link_rwsem);
 842         return res;
 843 }
 844
 845 /*
 846  * start callbacks
 847  */
 848 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 849 {
 850         struct snd_pcm_runtime *runtime = substream->runtime;
 851         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 852                 return -EBADFD;
 853         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 854             !snd_pcm_playback_data(substream))
 855                 return -EPIPE;
 856         runtime->trigger_master = substream;
 857         return 0;
 858 }
 859
 860 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 861 {
 862         if (substream->runtime->trigger_master != substream)
 863                 return 0;
 864         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
 865 }
 866
 867 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
 868 {
 869         if (substream->runtime->trigger_master == substream)
 870                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 871 }
 872
 873 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
 874 {
 875         struct snd_pcm_runtime *runtime = substream->runtime;
 876         snd_pcm_trigger_tstamp(substream);
 877         runtime->hw_ptr_jiffies = jiffies;
 878         runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
 879                                                             runtime->rate;
 880         runtime->status->state = state;
 881         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 882             runtime->silence_size > 0)
 883                 snd_pcm_playback_silence(substream, ULONG_MAX);
 884         if (substream->timer)
 885                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
 886                                  &runtime->trigger_tstamp);
 887 }
 888
 889 static struct action_ops snd_pcm_action_start = {
 890         .pre_action = snd_pcm_pre_start,
 891         .do_action = snd_pcm_do_start,
 892         .undo_action = snd_pcm_undo_start,
 893         .post_action = snd_pcm_post_start
 894 };
 895
 896 /**
 897  * snd_pcm_start - start all linked streams
 898  * @substream: the PCM substream instance
 899  */
 900 int snd_pcm_start(struct snd_pcm_substream *substream)
 901 {
 902         return snd_pcm_action(&snd_pcm_action_start, substream,
 903                               SNDRV_PCM_STATE_RUNNING);
 904 }
 905
 906 /*
 907  * stop callbacks
 908  */
 909 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
 910 {
 911         struct snd_pcm_runtime *runtime = substream->runtime;
 912         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 913                 return -EBADFD;
 914         runtime->trigger_master = substream;
 915         return 0;
 916 }
 917
 918 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
 919 {
 920         if (substream->runtime->trigger_master == substream &&
 921             snd_pcm_running(substream))
 922                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 923         return 0; /* unconditonally stop all substreams */
 924 }
 925
 926 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
 927 {
 928         struct snd_pcm_runtime *runtime = substream->runtime;
 929         if (runtime->status->state != state) {
 930                 snd_pcm_trigger_tstamp(substream);
 931                 if (substream->timer)
 932                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
 933                                          &runtime->trigger_tstamp);
 934                 runtime->status->state = state;
 935         }
 936         wake_up(&runtime->sleep);
 937         wake_up(&runtime->tsleep);
 938 }
 939
 940 static struct action_ops snd_pcm_action_stop = {
 941         .pre_action = snd_pcm_pre_stop,
 942         .do_action = snd_pcm_do_stop,
 943         .post_action = snd_pcm_post_stop
 944 };
 945
 946 /**
 947  * snd_pcm_stop - try to stop all running streams in the substream group
 948  * @substream: the PCM substream instance
 949  * @state: PCM state after stopping the stream
 950  *
 951  * The state of each stream is then changed to the given state unconditionally.
 952  */
 953 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
 954 {
 955         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
 956 }
 957
 958 EXPORT_SYMBOL(snd_pcm_stop);
 959
 960 /**
 961  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
 962  * @substream: the PCM substream
 963  *
 964  * After stopping, the state is changed to SETUP.
 965  * Unlike snd_pcm_stop(), this affects only the given stream.
 966  */
 967 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
 968 {
 969         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
 970                                      SNDRV_PCM_STATE_SETUP);
 971 }
 972
 973 /*
 974  * pause callbacks
 975  */
 976 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
 977 {
 978         struct snd_pcm_runtime *runtime = substream->runtime;
 979         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
 980                 return -ENOSYS;
 981         if (push) {
 982                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
 983                         return -EBADFD;
 984         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
 985                 return -EBADFD;
 986         runtime->trigger_master = substream;
 987         return 0;
 988 }
 989
 990 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
 991 {
 992         if (substream->runtime->trigger_master != substream)
 993                 return 0;
 994         /* some drivers might use hw_ptr to recover from the pause -
 995            update the hw_ptr now */
 996         if (push)
 997                 snd_pcm_update_hw_ptr(substream);
 998         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
 999          * a delta between the current jiffies, this gives a large enough
1000          * delta, effectively to skip the check once.
1001          */
1002         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1003         return substream->ops->trigger(substream,
1004                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1005                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1006 }
1007
1008 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1009 {
1010         if (substream->runtime->trigger_master == substream)
1011                 substream->ops->trigger(substream,
1012                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1013                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1014 }
1015
1016 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1017 {
1018         struct snd_pcm_runtime *runtime = substream->runtime;
1019         snd_pcm_trigger_tstamp(substream);
1020         if (push) {
1021                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1022                 if (substream->timer)
1023                         snd_timer_notify(substream->timer,
1024                                          SNDRV_TIMER_EVENT_MPAUSE,
1025                                          &runtime->trigger_tstamp);
1026                 wake_up(&runtime->sleep);
1027                 wake_up(&runtime->tsleep);
1028         } else {
1029                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1030                 if (substream->timer)
1031                         snd_timer_notify(substream->timer,
1032                                          SNDRV_TIMER_EVENT_MCONTINUE,
1033                                          &runtime->trigger_tstamp);
1034         }
1035 }
1036
1037 static struct action_ops snd_pcm_action_pause = {
1038         .pre_action = snd_pcm_pre_pause,
1039         .do_action = snd_pcm_do_pause,
1040         .undo_action = snd_pcm_undo_pause,
1041         .post_action = snd_pcm_post_pause
1042 };
1043
1044 /*
1045  * Push/release the pause for all linked streams.
1046  */
1047 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1048 {
1049         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1050 }
1051
1052 #ifdef CONFIG_PM
1053 /* suspend */
1054
1055 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1056 {
1057         struct snd_pcm_runtime *runtime = substream->runtime;
1058         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1059                 return -EBUSY;
1060         runtime->trigger_master = substream;
1061         return 0;
1062 }
1063
1064 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1065 {
1066         struct snd_pcm_runtime *runtime = substream->runtime;
1067         if (runtime->trigger_master != substream)
1068                 return 0;
1069         if (! snd_pcm_running(substream))
1070                 return 0;
1071         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1072         return 0; /* suspend unconditionally */
1073 }
1074
1075 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1076 {
1077         struct snd_pcm_runtime *runtime = substream->runtime;
1078         snd_pcm_trigger_tstamp(substream);
1079         if (substream->timer)
1080                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1081                                  &runtime->trigger_tstamp);
1082         runtime->status->suspended_state = runtime->status->state;
1083         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1084         wake_up(&runtime->sleep);
1085         wake_up(&runtime->tsleep);
1086 }
1087
1088 static struct action_ops snd_pcm_action_suspend = {
1089         .pre_action = snd_pcm_pre_suspend,
1090         .do_action = snd_pcm_do_suspend,
1091         .post_action = snd_pcm_post_suspend
1092 };
1093
1094 /**
1095  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1096  * @substream: the PCM substream
1097  *
1098  * After this call, all streams are changed to SUSPENDED state.
1099  */
1100 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1101 {
1102         int err;
1103         unsigned long flags;
1104
1105         if (! substream)
1106                 return 0;
1107
1108         snd_pcm_stream_lock_irqsave(substream, flags);
1109         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1110         snd_pcm_stream_unlock_irqrestore(substream, flags);
1111         return err;
1112 }
1113
1114 EXPORT_SYMBOL(snd_pcm_suspend);
1115
1116 /**
1117  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1118  * @pcm: the PCM instance
1119  *
1120  * After this call, all streams are changed to SUSPENDED state.
1121  */
1122 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1123 {
1124         struct snd_pcm_substream *substream;
1125         int stream, err = 0;
1126
1127         if (! pcm)
1128                 return 0;
1129
1130         for (stream = 0; stream < 2; stream++) {
1131                 for (substream = pcm->streams[stream].substream;
1132                      substream; substream = substream->next) {
1133                         /* FIXME: the open/close code should lock this as well */
1134                         if (substream->runtime == NULL)
1135                                 continue;
1136                         err = snd_pcm_suspend(substream);
1137                         if (err < 0 && err != -EBUSY)
1138                                 return err;
1139                 }
1140         }
1141         return 0;
1142 }
1143
1144 EXPORT_SYMBOL(snd_pcm_suspend_all);
1145
1146 /* resume */
1147
1148 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1149 {
1150         struct snd_pcm_runtime *runtime = substream->runtime;
1151         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1152                 return -ENOSYS;
1153         runtime->trigger_master = substream;
1154         return 0;
1155 }
1156
1157 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1158 {
1159         struct snd_pcm_runtime *runtime = substream->runtime;
1160         if (runtime->trigger_master != substream)
1161                 return 0;
1162         /* DMA not running previously? */
1163         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1164             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1165              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1166                 return 0;
1167         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1168 }
1169
1170 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1171 {
1172         if (substream->runtime->trigger_master == substream &&
1173             snd_pcm_running(substream))
1174                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1175 }
1176
1177 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1178 {
1179         struct snd_pcm_runtime *runtime = substream->runtime;
1180         snd_pcm_trigger_tstamp(substream);
1181         if (substream->timer)
1182                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1183                                  &runtime->trigger_tstamp);
1184         runtime->status->state = runtime->status->suspended_state;
1185 }
1186
1187 static struct action_ops snd_pcm_action_resume = {
1188         .pre_action = snd_pcm_pre_resume,
1189         .do_action = snd_pcm_do_resume,
1190         .undo_action = snd_pcm_undo_resume,
1191         .post_action = snd_pcm_post_resume
1192 };
1193
1194 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1195 {
1196         struct snd_card *card = substream->pcm->card;
1197         int res;
1198
1199         snd_power_lock(card);
1200         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1201                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1202         snd_power_unlock(card);
1203         return res;
1204 }
1205
1206 #else
1207
1208 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1209 {
1210         return -ENOSYS;
1211 }
1212
1213 #endif /* CONFIG_PM */
1214
1215 /*
1216  * xrun ioctl
1217  *
1218  * Change the RUNNING stream(s) to XRUN state.
1219  */
1220 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1221 {
1222         struct snd_card *card = substream->pcm->card;
1223         struct snd_pcm_runtime *runtime = substream->runtime;
1224         int result;
1225
1226         snd_power_lock(card);
1227         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1228                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1229                 if (result < 0)
1230                         goto _unlock;
1231         }
1232
1233         snd_pcm_stream_lock_irq(substream);
1234         switch (runtime->status->state) {
1235         case SNDRV_PCM_STATE_XRUN:
1236                 result = 0;     /* already there */
1237                 break;
1238         case SNDRV_PCM_STATE_RUNNING:
1239                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1240                 break;
1241         default:
1242                 result = -EBADFD;
1243         }
1244         snd_pcm_stream_unlock_irq(substream);
1245  _unlock:
1246         snd_power_unlock(card);
1247         return result;
1248 }
1249
1250 /*
1251  * reset ioctl
1252  */
1253 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1254 {
1255         struct snd_pcm_runtime *runtime = substream->runtime;
1256         switch (runtime->status->state) {
1257         case SNDRV_PCM_STATE_RUNNING:
1258         case SNDRV_PCM_STATE_PREPARED:
1259         case SNDRV_PCM_STATE_PAUSED:
1260         case SNDRV_PCM_STATE_SUSPENDED:
1261                 return 0;
1262         default:
1263                 return -EBADFD;
1264         }
1265 }
1266
1267 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1268 {
1269         struct snd_pcm_runtime *runtime = substream->runtime;
1270         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1271         if (err < 0)
1272                 return err;
1273         runtime->hw_ptr_base = 0;
1274         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1275                 runtime->status->hw_ptr % runtime->period_size;
1276         runtime->silence_start = runtime->status->hw_ptr;
1277         runtime->silence_filled = 0;
1278         return 0;
1279 }
1280
1281 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1282 {
1283         struct snd_pcm_runtime *runtime = substream->runtime;
1284         runtime->control->appl_ptr = runtime->status->hw_ptr;
1285         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1286             runtime->silence_size > 0)
1287                 snd_pcm_playback_silence(substream, ULONG_MAX);
1288 }
1289
1290 static struct action_ops snd_pcm_action_reset = {
1291         .pre_action = snd_pcm_pre_reset,
1292         .do_action = snd_pcm_do_reset,
1293         .post_action = snd_pcm_post_reset
1294 };
1295
1296 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1297 {
1298         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1299 }
1300
1301 /*
1302  * prepare ioctl
1303  */
1304 /* we use the second argument for updating f_flags */
1305 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1306                                int f_flags)
1307 {
1308         struct snd_pcm_runtime *runtime = substream->runtime;
1309         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1310             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1311                 return -EBADFD;
1312         if (snd_pcm_running(substream))
1313                 return -EBUSY;
1314         substream->f_flags = f_flags;
1315         return 0;
1316 }
1317
1318 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1319 {
1320         int err;
1321         err = substream->ops->prepare(substream);
1322         if (err < 0)
1323                 return err;
1324         return snd_pcm_do_reset(substream, 0);
1325 }
1326
1327 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1328 {
1329         struct snd_pcm_runtime *runtime = substream->runtime;
1330         runtime->control->appl_ptr = runtime->status->hw_ptr;
1331         snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1332 }
1333
1334 static struct action_ops snd_pcm_action_prepare = {
1335         .pre_action = snd_pcm_pre_prepare,
1336         .do_action = snd_pcm_do_prepare,
1337         .post_action = snd_pcm_post_prepare
1338 };
1339
1340 /**
1341  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1342  * @substream: the PCM substream instance
1343  * @file: file to refer f_flags
1344  */
1345 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1346                            struct file *file)
1347 {
1348         int res;
1349         struct snd_card *card = substream->pcm->card;
1350         int f_flags;
1351
1352         if (file)
1353                 f_flags = file->f_flags;
1354         else
1355                 f_flags = substream->f_flags;
1356
1357         snd_power_lock(card);
1358         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1359                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1360                                                substream, f_flags);
1361         snd_power_unlock(card);
1362         return res;
1363 }
1364
1365 /*
1366  * drain ioctl
1367  */
1368
1369 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1370 {
1371         struct snd_pcm_runtime *runtime = substream->runtime;
1372         switch (runtime->status->state) {
1373         case SNDRV_PCM_STATE_OPEN:
1374         case SNDRV_PCM_STATE_DISCONNECTED:
1375         case SNDRV_PCM_STATE_SUSPENDED:
1376                 return -EBADFD;
1377         }
1378         runtime->trigger_master = substream;
1379         return 0;
1380 }
1381
1382 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1383 {
1384         struct snd_pcm_runtime *runtime = substream->runtime;
1385         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1386                 switch (runtime->status->state) {
1387                 case SNDRV_PCM_STATE_PREPARED:
1388                         /* start playback stream if possible */
1389                         if (! snd_pcm_playback_empty(substream)) {
1390                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1391                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1392                         }
1393                         break;
1394                 case SNDRV_PCM_STATE_RUNNING:
1395                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1396                         break;
1397                 case SNDRV_PCM_STATE_XRUN:
1398                         runtime->status->state = SNDRV_PCM_STATE_SETUP;
1399                         break;
1400                 default:
1401                         break;
1402                 }
1403         } else {
1404                 /* stop running stream */
1405                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1406                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1407                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1408                         snd_pcm_do_stop(substream, new_state);
1409                         snd_pcm_post_stop(substream, new_state);
1410                 }
1411         }
1412         return 0;
1413 }
1414
1415 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1416 {
1417 }
1418
1419 static struct action_ops snd_pcm_action_drain_init = {
1420         .pre_action = snd_pcm_pre_drain_init,
1421         .do_action = snd_pcm_do_drain_init,
1422         .post_action = snd_pcm_post_drain_init
1423 };
1424
1425 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1426
1427 /*
1428  * Drain the stream(s).
1429  * When the substream is linked, sync until the draining of all playback streams
1430  * is finished.
1431  * After this call, all streams are supposed to be either SETUP or DRAINING
1432  * (capture only) state.
1433  */
1434 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1435                          struct file *file)
1436 {
1437         struct snd_card *card;
1438         struct snd_pcm_runtime *runtime;
1439         struct snd_pcm_substream *s;
1440         wait_queue_t wait;
1441         int result = 0;
1442         int nonblock = 0;
1443
1444         card = substream->pcm->card;
1445         runtime = substream->runtime;
1446
1447         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1448                 return -EBADFD;
1449
1450         snd_power_lock(card);
1451         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1452                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1453                 if (result < 0) {
1454                         snd_power_unlock(card);
1455                         return result;
1456                 }
1457         }
1458
1459         if (file) {
1460                 if (file->f_flags & O_NONBLOCK)
1461                         nonblock = 1;
1462         } else if (substream->f_flags & O_NONBLOCK)
1463                 nonblock = 1;
1464
1465         down_read(&snd_pcm_link_rwsem);
1466         snd_pcm_stream_lock_irq(substream);
1467         /* resume pause */
1468         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1469                 snd_pcm_pause(substream, 0);
1470
1471         /* pre-start/stop - all running streams are changed to DRAINING state */
1472         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1473         if (result < 0)
1474                 goto unlock;
1475         /* in non-blocking, we don't wait in ioctl but let caller poll */
1476         if (nonblock) {
1477                 result = -EAGAIN;
1478                 goto unlock;
1479         }
1480
1481         for (;;) {
1482                 long tout;
1483                 struct snd_pcm_runtime *to_check;
1484                 if (signal_pending(current)) {
1485                         result = -ERESTARTSYS;
1486                         break;
1487                 }
1488                 /* find a substream to drain */
1489                 to_check = NULL;
1490                 snd_pcm_group_for_each_entry(s, substream) {
1491                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1492                                 continue;
1493                         runtime = s->runtime;
1494                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1495                                 to_check = runtime;
1496                                 break;
1497                         }
1498                 }
1499                 if (!to_check)
1500                         break; /* all drained */
1501                 init_waitqueue_entry(&wait, current);
1502                 add_wait_queue(&to_check->sleep, &wait);
1503                 snd_pcm_stream_unlock_irq(substream);
1504                 up_read(&snd_pcm_link_rwsem);
1505                 snd_power_unlock(card);
1506                 if (runtime->no_period_wakeup)
1507                         tout = MAX_SCHEDULE_TIMEOUT;
1508                 else {
1509                         tout = 10;
1510                         if (runtime->rate) {
1511                                 long t = runtime->period_size * 2 / runtime->rate;
1512                                 tout = max(t, tout);
1513                         }
1514                         tout = msecs_to_jiffies(tout * 1000);
1515                 }
1516                 tout = schedule_timeout_interruptible(tout);
1517                 snd_power_lock(card);
1518                 down_read(&snd_pcm_link_rwsem);
1519                 snd_pcm_stream_lock_irq(substream);
1520                 remove_wait_queue(&to_check->sleep, &wait);
1521                 if (card->shutdown) {
1522                         result = -ENODEV;
1523                         break;
1524                 }
1525                 if (tout == 0) {
1526                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1527                                 result = -ESTRPIPE;
1528                         else {
1529                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1530                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1531                                 result = -EIO;
1532                         }
1533                         break;
1534                 }
1535         }
1536
1537  unlock:
1538         snd_pcm_stream_unlock_irq(substream);
1539         up_read(&snd_pcm_link_rwsem);
1540         snd_power_unlock(card);
1541
1542         return result;
1543 }
1544
1545 /*
1546  * drop ioctl
1547  *
1548  * Immediately put all linked substreams into SETUP state.
1549  */
1550 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1551 {
1552         struct snd_pcm_runtime *runtime;
1553         int result = 0;
1554
1555         if (PCM_RUNTIME_CHECK(substream))
1556                 return -ENXIO;
1557         runtime = substream->runtime;
1558
1559         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1560             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1561             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1562                 return -EBADFD;
1563
1564         snd_pcm_stream_lock_irq(substream);
1565         /* resume pause */
1566         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1567                 snd_pcm_pause(substream, 0);
1568
1569         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1570         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1571         snd_pcm_stream_unlock_irq(substream);
1572
1573         return result;
1574 }
1575
1576
1577 /* WARNING: Don't forget to fput back the file */
1578 static struct file *snd_pcm_file_fd(int fd, int *fput_needed)
1579 {
1580         struct file *file;
1581         struct inode *inode;
1582         unsigned int minor;
1583
1584         file = fget_light(fd, fput_needed);
1585         if (!file)
1586                 return NULL;
1587         inode = file->f_path.dentry->d_inode;
1588         if (!S_ISCHR(inode->i_mode) ||
1589             imajor(inode) != snd_major) {
1590                 fput_light(file, *fput_needed);
1591                 return NULL;
1592         }
1593         minor = iminor(inode);
1594         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1595             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1596                 fput_light(file, *fput_needed);
1597                 return NULL;
1598         }
1599         return file;
1600 }
1601
1602 /*
1603  * PCM link handling
1604  */
1605 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1606 {
1607         int res = 0;
1608         struct file *file;
1609         struct snd_pcm_file *pcm_file;
1610         struct snd_pcm_substream *substream1;
1611         struct snd_pcm_group *group;
1612         int fput_needed;
1613
1614         file = snd_pcm_file_fd(fd, &fput_needed);
1615         if (!file)
1616                 return -EBADFD;
1617         pcm_file = file->private_data;
1618         substream1 = pcm_file->substream;
1619         group = kmalloc(sizeof(*group), GFP_KERNEL);
1620         if (!group) {
1621                 res = -ENOMEM;
1622                 goto _nolock;
1623         }
1624         down_write(&snd_pcm_link_rwsem);
1625         write_lock_irq(&snd_pcm_link_rwlock);
1626         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1627             substream->runtime->status->state != substream1->runtime->status->state) {
1628                 res = -EBADFD;
1629                 goto _end;
1630         }
1631         if (snd_pcm_stream_linked(substream1)) {
1632                 res = -EALREADY;
1633                 goto _end;
1634         }
1635         if (!snd_pcm_stream_linked(substream)) {
1636                 substream->group = group;
1637                 spin_lock_init(&substream->group->lock);
1638                 INIT_LIST_HEAD(&substream->group->substreams);
1639                 list_add_tail(&substream->link_list, &substream->group->substreams);
1640                 substream->group->count = 1;
1641         }
1642         list_add_tail(&substream1->link_list, &substream->group->substreams);
1643         substream->group->count++;
1644         substream1->group = substream->group;
1645  _end:
1646         write_unlock_irq(&snd_pcm_link_rwlock);
1647         up_write(&snd_pcm_link_rwsem);
1648  _nolock:
1649         snd_card_unref(substream1->pcm->card);
1650         fput_light(file, fput_needed);
1651         if (res < 0)
1652                 kfree(group);
1653         return res;
1654 }
1655
1656 static void relink_to_local(struct snd_pcm_substream *substream)
1657 {
1658         substream->group = &substream->self_group;
1659         INIT_LIST_HEAD(&substream->self_group.substreams);
1660         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1661 }
1662
1663 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1664 {
1665         struct snd_pcm_substream *s;
1666         int res = 0;
1667
1668         down_write(&snd_pcm_link_rwsem);
1669         write_lock_irq(&snd_pcm_link_rwlock);
1670         if (!snd_pcm_stream_linked(substream)) {
1671                 res = -EALREADY;
1672                 goto _end;
1673         }
1674         list_del(&substream->link_list);
1675         substream->group->count--;
1676         if (substream->group->count == 1) {     /* detach the last stream, too */
1677                 snd_pcm_group_for_each_entry(s, substream) {
1678                         relink_to_local(s);
1679                         break;
1680                 }
1681                 kfree(substream->group);
1682         }
1683         relink_to_local(substream);
1684        _end:
1685         write_unlock_irq(&snd_pcm_link_rwlock);
1686         up_write(&snd_pcm_link_rwsem);
1687         return res;
1688 }
1689
1690 /*
1691  * hw configurator
1692  */
1693 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1694                                struct snd_pcm_hw_rule *rule)
1695 {
1696         struct snd_interval t;
1697         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1698                      hw_param_interval_c(params, rule->deps[1]), &t);
1699         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1700 }
1701
1702 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1703                                struct snd_pcm_hw_rule *rule)
1704 {
1705         struct snd_interval t;
1706         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1707                      hw_param_interval_c(params, rule->deps[1]), &t);
1708         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1709 }
1710
1711 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1712                                    struct snd_pcm_hw_rule *rule)
1713 {
1714         struct snd_interval t;
1715         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1716                          hw_param_interval_c(params, rule->deps[1]),
1717                          (unsigned long) rule->private, &t);
1718         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1719 }
1720
1721 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1722                                    struct snd_pcm_hw_rule *rule)
1723 {
1724         struct snd_interval t;
1725         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1726                          (unsigned long) rule->private,
1727                          hw_param_interval_c(params, rule->deps[1]), &t);
1728         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1729 }
1730
1731 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1732                                   struct snd_pcm_hw_rule *rule)
1733 {
1734         unsigned int k;
1735         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1736         struct snd_mask m;
1737         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1738         snd_mask_any(&m);
1739         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1740                 int bits;
1741                 if (! snd_mask_test(mask, k))
1742                         continue;
1743                 bits = snd_pcm_format_physical_width(k);
1744                 if (bits <= 0)
1745                         continue; /* ignore invalid formats */
1746                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1747                         snd_mask_reset(&m, k);
1748         }
1749         return snd_mask_refine(mask, &m);
1750 }
1751
1752 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1753                                        struct snd_pcm_hw_rule *rule)
1754 {
1755         struct snd_interval t;
1756         unsigned int k;
1757         t.min = UINT_MAX;
1758         t.max = 0;
1759         t.openmin = 0;
1760         t.openmax = 0;
1761         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1762                 int bits;
1763                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1764                         continue;
1765                 bits = snd_pcm_format_physical_width(k);
1766                 if (bits <= 0)
1767                         continue; /* ignore invalid formats */
1768                 if (t.min > (unsigned)bits)
1769                         t.min = bits;
1770                 if (t.max < (unsigned)bits)
1771                         t.max = bits;
1772         }
1773         t.integer = 1;
1774         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1775 }
1776
1777 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1778 #error "Change this table"
1779 #endif
1780
1781 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1782                                  48000, 64000, 88200, 96000, 176400, 192000 };
1783
1784 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1785         .count = ARRAY_SIZE(rates),
1786         .list = rates,
1787 };
1788
1789 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1790                                 struct snd_pcm_hw_rule *rule)
1791 {
1792         struct snd_pcm_hardware *hw = rule->private;
1793         return snd_interval_list(hw_param_interval(params, rule->var),
1794                                  snd_pcm_known_rates.count,
1795                                  snd_pcm_known_rates.list, hw->rates);
1796 }
1797
1798 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1799                                             struct snd_pcm_hw_rule *rule)
1800 {
1801         struct snd_interval t;
1802         struct snd_pcm_substream *substream = rule->private;
1803         t.min = 0;
1804         t.max = substream->buffer_bytes_max;
1805         t.openmin = 0;
1806         t.openmax = 0;
1807         t.integer = 1;
1808         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1809 }
1810
1811 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1812 {
1813         struct snd_pcm_runtime *runtime = substream->runtime;
1814         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1815         int k, err;
1816
1817         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1818                 snd_mask_any(constrs_mask(constrs, k));
1819         }
1820
1821         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1822                 snd_interval_any(constrs_interval(constrs, k));
1823         }
1824
1825         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1826         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1827         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1828         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1829         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1830
1831         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1832                                    snd_pcm_hw_rule_format, NULL,
1833                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1834         if (err < 0)
1835                 return err;
1836         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1837                                   snd_pcm_hw_rule_sample_bits, NULL,
1838                                   SNDRV_PCM_HW_PARAM_FORMAT,
1839                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1840         if (err < 0)
1841                 return err;
1842         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1843                                   snd_pcm_hw_rule_div, NULL,
1844                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1845         if (err < 0)
1846                 return err;
1847         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1848                                   snd_pcm_hw_rule_mul, NULL,
1849                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1850         if (err < 0)
1851                 return err;
1852         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1853                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1854                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1855         if (err < 0)
1856                 return err;
1857         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1858                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1859                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1860         if (err < 0)
1861                 return err;
1862         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1863                                   snd_pcm_hw_rule_div, NULL,
1864                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1865         if (err < 0)
1866                 return err;
1867         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1868                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1869                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1870         if (err < 0)
1871                 return err;
1872         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1873                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1874                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1875         if (err < 0)
1876                 return err;
1877         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1878                                   snd_pcm_hw_rule_div, NULL,
1879                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1880         if (err < 0)
1881                 return err;
1882         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1883                                   snd_pcm_hw_rule_div, NULL,
1884                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1885         if (err < 0)
1886                 return err;
1887         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1888                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1889                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1890         if (err < 0)
1891                 return err;
1892         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1893                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1894                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1895         if (err < 0)
1896                 return err;
1897         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1898                                   snd_pcm_hw_rule_mul, NULL,
1899                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1900         if (err < 0)
1901                 return err;
1902         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1903                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1904                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1905         if (err < 0)
1906                 return err;
1907         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1908                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1909                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1910         if (err < 0)
1911                 return err;
1912         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1913                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1914                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1915         if (err < 0)
1916                 return err;
1917         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1918                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1919                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1920         if (err < 0)
1921                 return err;
1922         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1923                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1924                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1925         if (err < 0)
1926                 return err;
1927         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1928                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1929                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1930         if (err < 0)
1931                 return err;
1932         return 0;
1933 }
1934
1935 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1936 {
1937         struct snd_pcm_runtime *runtime = substream->runtime;
1938         struct snd_pcm_hardware *hw = &runtime->hw;
1939         int err;
1940         unsigned int mask = 0;
1941
1942         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1943                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1944         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1945                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1946         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1947                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1948                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1949                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1950                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1951                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1952                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1953         }
1954         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1955         if (err < 0)
1956                 return err;
1957
1958         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1959         if (err < 0)
1960                 return err;
1961
1962         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1963         if (err < 0)
1964                 return err;
1965
1966         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1967                                            hw->channels_min, hw->channels_max);
1968         if (err < 0)
1969                 return err;
1970
1971         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1972                                            hw->rate_min, hw->rate_max);
1973         if (err < 0)
1974                 return err;
1975
1976         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1977                                            hw->period_bytes_min, hw->period_bytes_max);
1978         if (err < 0)
1979                 return err;
1980
1981         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1982                                            hw->periods_min, hw->periods_max);
1983         if (err < 0)
1984                 return err;
1985
1986         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1987                                            hw->period_bytes_min, hw->buffer_bytes_max);
1988         if (err < 0)
1989                 return err;
1990
1991         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1992                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1993                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1994         if (err < 0)
1995                 return err;
1996
1997         /* FIXME: remove */
1998         if (runtime->dma_bytes) {
1999                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2000                 if (err < 0)
2001                         return -EINVAL;
2002         }
2003
2004         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2005                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2006                                           snd_pcm_hw_rule_rate, hw,
2007                                           SNDRV_PCM_HW_PARAM_RATE, -1);
2008                 if (err < 0)
2009                         return err;
2010         }
2011
2012         /* FIXME: this belong to lowlevel */
2013         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2014
2015         return 0;
2016 }
2017
2018 static void pcm_release_private(struct snd_pcm_substream *substream)
2019 {
2020         snd_pcm_unlink(substream);
2021 }
2022
2023 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2024 {
2025         substream->ref_count--;
2026         if (substream->ref_count > 0)
2027                 return;
2028
2029         snd_pcm_drop(substream);
2030         if (substream->hw_opened) {
2031                 if (substream->ops->hw_free != NULL)
2032                         substream->ops->hw_free(substream);
2033                 substream->ops->close(substream);
2034                 substream->hw_opened = 0;
2035         }
2036         if (pm_qos_request_active(&substream->latency_pm_qos_req))
2037                 pm_qos_remove_request(&substream->latency_pm_qos_req);
2038         if (substream->pcm_release) {
2039                 substream->pcm_release(substream);
2040                 substream->pcm_release = NULL;
2041         }
2042         snd_pcm_detach_substream(substream);
2043 }
2044
2045 EXPORT_SYMBOL(snd_pcm_release_substream);
2046
2047 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2048                            struct file *file,
2049                            struct snd_pcm_substream **rsubstream)
2050 {
2051         struct snd_pcm_substream *substream;
2052         int err;
2053
2054         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2055         if (err < 0)
2056                 return err;
2057         if (substream->ref_count > 1) {
2058                 *rsubstream = substream;
2059                 return 0;
2060         }
2061
2062         err = snd_pcm_hw_constraints_init(substream);
2063         if (err < 0) {
2064                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2065                 goto error;
2066         }
2067
2068         if ((err = substream->ops->open(substream)) < 0)
2069                 goto error;
2070
2071         substream->hw_opened = 1;
2072
2073         err = snd_pcm_hw_constraints_complete(substream);
2074         if (err < 0) {
2075                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2076                 goto error;
2077         }
2078
2079         *rsubstream = substream;
2080         return 0;
2081
2082  error:
2083         snd_pcm_release_substream(substream);
2084         return err;
2085 }
2086
2087 EXPORT_SYMBOL(snd_pcm_open_substream);
2088
2089 static int snd_pcm_open_file(struct file *file,
2090                              struct snd_pcm *pcm,
2091                              int stream)
2092 {
2093         struct snd_pcm_file *pcm_file;
2094         struct snd_pcm_substream *substream;
2095         int err;
2096
2097         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2098         if (err < 0)
2099                 return err;
2100
2101         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2102         if (pcm_file == NULL) {
2103                 snd_pcm_release_substream(substream);
2104                 return -ENOMEM;
2105         }
2106         pcm_file->substream = substream;
2107         if (substream->ref_count == 1) {
2108                 substream->file = pcm_file;
2109                 substream->pcm_release = pcm_release_private;
2110         }
2111         file->private_data = pcm_file;
2112
2113         return 0;
2114 }
2115
2116 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2117 {
2118         struct snd_pcm *pcm;
2119         int err = nonseekable_open(inode, file);
2120         if (err < 0)
2121                 return err;
2122         pcm = snd_lookup_minor_data(iminor(inode),
2123                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2124         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2125         if (pcm)
2126                 snd_card_unref(pcm->card);
2127         return err;
2128 }
2129
2130 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2131 {
2132         struct snd_pcm *pcm;
2133         int err = nonseekable_open(inode, file);
2134         if (err < 0)
2135                 return err;
2136         pcm = snd_lookup_minor_data(iminor(inode),
2137                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2138         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2139         if (pcm)
2140                 snd_card_unref(pcm->card);
2141         return err;
2142 }
2143
2144 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2145 {
2146         int err;
2147         wait_queue_t wait;
2148
2149         if (pcm == NULL) {
2150                 err = -ENODEV;
2151                 goto __error1;
2152         }
2153         err = snd_card_file_add(pcm->card, file);
2154         if (err < 0)
2155                 goto __error1;
2156         if (!try_module_get(pcm->card->module)) {
2157                 err = -EFAULT;
2158                 goto __error2;
2159         }
2160         init_waitqueue_entry(&wait, current);
2161         add_wait_queue(&pcm->open_wait, &wait);
2162         mutex_lock(&pcm->open_mutex);
2163         while (1) {
2164                 err = snd_pcm_open_file(file, pcm, stream);
2165                 if (err >= 0)
2166                         break;
2167                 if (err == -EAGAIN) {
2168                         if (file->f_flags & O_NONBLOCK) {
2169                                 err = -EBUSY;
2170                                 break;
2171                         }
2172                 } else
2173                         break;
2174                 set_current_state(TASK_INTERRUPTIBLE);
2175                 mutex_unlock(&pcm->open_mutex);
2176                 schedule();
2177                 mutex_lock(&pcm->open_mutex);
2178                 if (pcm->card->shutdown) {
2179                         err = -ENODEV;
2180                         break;
2181                 }
2182                 if (signal_pending(current)) {
2183                         err = -ERESTARTSYS;
2184                         break;
2185                 }
2186         }
2187         remove_wait_queue(&pcm->open_wait, &wait);
2188         mutex_unlock(&pcm->open_mutex);
2189         if (err < 0)
2190                 goto __error;
2191         return err;
2192
2193       __error:
2194         module_put(pcm->card->module);
2195       __error2:
2196         snd_card_file_remove(pcm->card, file);
2197       __error1:
2198         return err;
2199 }
2200
2201 static int snd_pcm_release(struct inode *inode, struct file *file)
2202 {
2203         struct snd_pcm *pcm;
2204         struct snd_pcm_substream *substream;
2205         struct snd_pcm_file *pcm_file;
2206
2207         pcm_file = file->private_data;
2208         substream = pcm_file->substream;
2209         if (snd_BUG_ON(!substream))
2210                 return -ENXIO;
2211         pcm = substream->pcm;
2212         mutex_lock(&pcm->open_mutex);
2213         snd_pcm_release_substream(substream);
2214         kfree(pcm_file);
2215         mutex_unlock(&pcm->open_mutex);
2216         wake_up(&pcm->open_wait);
2217         module_put(pcm->card->module);
2218         snd_card_file_remove(pcm->card, file);
2219         return 0;
2220 }
2221
2222 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2223                                                  snd_pcm_uframes_t frames)
2224 {
2225         struct snd_pcm_runtime *runtime = substream->runtime;
2226         snd_pcm_sframes_t appl_ptr;
2227         snd_pcm_sframes_t ret;
2228         snd_pcm_sframes_t hw_avail;
2229
2230         if (frames == 0)
2231                 return 0;
2232
2233         snd_pcm_stream_lock_irq(substream);
2234         switch (runtime->status->state) {
2235         case SNDRV_PCM_STATE_PREPARED:
2236                 break;
2237         case SNDRV_PCM_STATE_DRAINING:
2238         case SNDRV_PCM_STATE_RUNNING:
2239                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2240                         break;
2241                 /* Fall through */
2242         case SNDRV_PCM_STATE_XRUN:
2243                 ret = -EPIPE;
2244                 goto __end;
2245         case SNDRV_PCM_STATE_SUSPENDED:
2246                 ret = -ESTRPIPE;
2247                 goto __end;
2248         default:
2249                 ret = -EBADFD;
2250                 goto __end;
2251         }
2252
2253         hw_avail = snd_pcm_playback_hw_avail(runtime);
2254         if (hw_avail <= 0) {
2255                 ret = 0;
2256                 goto __end;
2257         }
2258         if (frames > (snd_pcm_uframes_t)hw_avail)
2259                 frames = hw_avail;
2260         appl_ptr = runtime->control->appl_ptr - frames;
2261         if (appl_ptr < 0)
2262                 appl_ptr += runtime->boundary;
2263         runtime->control->appl_ptr = appl_ptr;
2264         ret = frames;
2265  __end:
2266         snd_pcm_stream_unlock_irq(substream);
2267         return ret;
2268 }
2269
2270 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2271                                                 snd_pcm_uframes_t frames)
2272 {
2273         struct snd_pcm_runtime *runtime = substream->runtime;
2274         snd_pcm_sframes_t appl_ptr;
2275         snd_pcm_sframes_t ret;
2276         snd_pcm_sframes_t hw_avail;
2277
2278         if (frames == 0)
2279                 return 0;
2280
2281         snd_pcm_stream_lock_irq(substream);
2282         switch (runtime->status->state) {
2283         case SNDRV_PCM_STATE_PREPARED:
2284         case SNDRV_PCM_STATE_DRAINING:
2285                 break;
2286         case SNDRV_PCM_STATE_RUNNING:
2287                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2288                         break;
2289                 /* Fall through */
2290         case SNDRV_PCM_STATE_XRUN:
2291                 ret = -EPIPE;
2292                 goto __end;
2293         case SNDRV_PCM_STATE_SUSPENDED:
2294                 ret = -ESTRPIPE;
2295                 goto __end;
2296         default:
2297                 ret = -EBADFD;
2298                 goto __end;
2299         }
2300
2301         hw_avail = snd_pcm_capture_hw_avail(runtime);
2302         if (hw_avail <= 0) {
2303                 ret = 0;
2304                 goto __end;
2305         }
2306         if (frames > (snd_pcm_uframes_t)hw_avail)
2307                 frames = hw_avail;
2308         appl_ptr = runtime->control->appl_ptr - frames;
2309         if (appl_ptr < 0)
2310                 appl_ptr += runtime->boundary;
2311         runtime->control->appl_ptr = appl_ptr;
2312         ret = frames;
2313  __end:
2314         snd_pcm_stream_unlock_irq(substream);
2315         return ret;
2316 }
2317
2318 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2319                                                   snd_pcm_uframes_t frames)
2320 {
2321         struct snd_pcm_runtime *runtime = substream->runtime;
2322         snd_pcm_sframes_t appl_ptr;
2323         snd_pcm_sframes_t ret;
2324         snd_pcm_sframes_t avail;
2325
2326         if (frames == 0)
2327                 return 0;
2328
2329         snd_pcm_stream_lock_irq(substream);
2330         switch (runtime->status->state) {
2331         case SNDRV_PCM_STATE_PREPARED:
2332         case SNDRV_PCM_STATE_PAUSED:
2333                 break;
2334         case SNDRV_PCM_STATE_DRAINING:
2335         case SNDRV_PCM_STATE_RUNNING:
2336                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2337                         break;
2338                 /* Fall through */
2339         case SNDRV_PCM_STATE_XRUN:
2340                 ret = -EPIPE;
2341                 goto __end;
2342         case SNDRV_PCM_STATE_SUSPENDED:
2343                 ret = -ESTRPIPE;
2344                 goto __end;
2345         default:
2346                 ret = -EBADFD;
2347                 goto __end;
2348         }
2349
2350         avail = snd_pcm_playback_avail(runtime);
2351         if (avail <= 0) {
2352                 ret = 0;
2353                 goto __end;
2354         }
2355         if (frames > (snd_pcm_uframes_t)avail)
2356                 frames = avail;
2357         appl_ptr = runtime->control->appl_ptr + frames;
2358         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2359                 appl_ptr -= runtime->boundary;
2360         runtime->control->appl_ptr = appl_ptr;
2361         ret = frames;
2362  __end:
2363         snd_pcm_stream_unlock_irq(substream);
2364         return ret;
2365 }
2366
2367 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2368                                                  snd_pcm_uframes_t frames)
2369 {
2370         struct snd_pcm_runtime *runtime = substream->runtime;
2371         snd_pcm_sframes_t appl_ptr;
2372         snd_pcm_sframes_t ret;
2373         snd_pcm_sframes_t avail;
2374
2375         if (frames == 0)
2376                 return 0;
2377
2378         snd_pcm_stream_lock_irq(substream);
2379         switch (runtime->status->state) {
2380         case SNDRV_PCM_STATE_PREPARED:
2381         case SNDRV_PCM_STATE_DRAINING:
2382         case SNDRV_PCM_STATE_PAUSED:
2383                 break;
2384         case SNDRV_PCM_STATE_RUNNING:
2385                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2386                         break;
2387                 /* Fall through */
2388         case SNDRV_PCM_STATE_XRUN:
2389                 ret = -EPIPE;
2390                 goto __end;
2391         case SNDRV_PCM_STATE_SUSPENDED:
2392                 ret = -ESTRPIPE;
2393                 goto __end;
2394         default:
2395                 ret = -EBADFD;
2396                 goto __end;
2397         }
2398
2399         avail = snd_pcm_capture_avail(runtime);
2400         if (avail <= 0) {
2401                 ret = 0;
2402                 goto __end;
2403         }
2404         if (frames > (snd_pcm_uframes_t)avail)
2405                 frames = avail;
2406         appl_ptr = runtime->control->appl_ptr + frames;
2407         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2408                 appl_ptr -= runtime->boundary;
2409         runtime->control->appl_ptr = appl_ptr;
2410         ret = frames;
2411  __end:
2412         snd_pcm_stream_unlock_irq(substream);
2413         return ret;
2414 }
2415
2416 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2417 {
2418         struct snd_pcm_runtime *runtime = substream->runtime;
2419         int err;
2420
2421         snd_pcm_stream_lock_irq(substream);
2422         switch (runtime->status->state) {
2423         case SNDRV_PCM_STATE_DRAINING:
2424                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2425                         goto __badfd;
2426         case SNDRV_PCM_STATE_RUNNING:
2427                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2428                         break;
2429                 /* Fall through */
2430         case SNDRV_PCM_STATE_PREPARED:
2431         case SNDRV_PCM_STATE_SUSPENDED:
2432                 err = 0;
2433                 break;
2434         case SNDRV_PCM_STATE_XRUN:
2435                 err = -EPIPE;
2436                 break;
2437         default:
2438               __badfd:
2439                 err = -EBADFD;
2440                 break;
2441         }
2442         snd_pcm_stream_unlock_irq(substream);
2443         return err;
2444 }
2445
2446 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2447                          snd_pcm_sframes_t __user *res)
2448 {
2449         struct snd_pcm_runtime *runtime = substream->runtime;
2450         int err;
2451         snd_pcm_sframes_t n = 0;
2452
2453         snd_pcm_stream_lock_irq(substream);
2454         switch (runtime->status->state) {
2455         case SNDRV_PCM_STATE_DRAINING:
2456                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2457                         goto __badfd;
2458         case SNDRV_PCM_STATE_RUNNING:
2459                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2460                         break;
2461                 /* Fall through */
2462         case SNDRV_PCM_STATE_PREPARED:
2463         case SNDRV_PCM_STATE_SUSPENDED:
2464                 err = 0;
2465                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2466                         n = snd_pcm_playback_hw_avail(runtime);
2467                 else
2468                         n = snd_pcm_capture_avail(runtime);
2469                 n += runtime->delay;
2470                 break;
2471         case SNDRV_PCM_STATE_XRUN:
2472                 err = -EPIPE;
2473                 break;
2474         default:
2475               __badfd:
2476                 err = -EBADFD;
2477                 break;
2478         }
2479         snd_pcm_stream_unlock_irq(substream);
2480         if (!err)
2481                 if (put_user(n, res))
2482                         err = -EFAULT;
2483         return err;
2484 }
2485
2486 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2487                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2488 {
2489         struct snd_pcm_runtime *runtime = substream->runtime;
2490         struct snd_pcm_sync_ptr sync_ptr;
2491         volatile struct snd_pcm_mmap_status *status;
2492         volatile struct snd_pcm_mmap_control *control;
2493         int err;
2494
2495         memset(&sync_ptr, 0, sizeof(sync_ptr));
2496         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2497                 return -EFAULT;
2498         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2499                 return -EFAULT;
2500         status = runtime->status;
2501         control = runtime->control;
2502         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2503                 err = snd_pcm_hwsync(substream);
2504                 if (err < 0)
2505                         return err;
2506         }
2507         snd_pcm_stream_lock_irq(substream);
2508         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2509                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2510         else
2511                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2512         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2513                 control->avail_min = sync_ptr.c.control.avail_min;
2514         else
2515                 sync_ptr.c.control.avail_min = control->avail_min;
2516         sync_ptr.s.status.state = status->state;
2517         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2518         sync_ptr.s.status.tstamp = status->tstamp;
2519         sync_ptr.s.status.suspended_state = status->suspended_state;
2520         snd_pcm_stream_unlock_irq(substream);
2521         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2522                 return -EFAULT;
2523         return 0;
2524 }
2525
2526 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2527 {
2528         struct snd_pcm_runtime *runtime = substream->runtime;
2529         int arg;
2530
2531         if (get_user(arg, _arg))
2532                 return -EFAULT;
2533         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2534                 return -EINVAL;
2535         runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2536         if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2537                 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2538         return 0;
2539 }
2540
2541 static int snd_pcm_common_ioctl1(struct file *file,
2542                                  struct snd_pcm_substream *substream,
2543                                  unsigned int cmd, void __user *arg)
2544 {
2545         switch (cmd) {
2546         case SNDRV_PCM_IOCTL_PVERSION:
2547                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2548         case SNDRV_PCM_IOCTL_INFO:
2549                 return snd_pcm_info_user(substream, arg);
2550         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2551                 return 0;
2552         case SNDRV_PCM_IOCTL_TTSTAMP:
2553                 return snd_pcm_tstamp(substream, arg);
2554         case SNDRV_PCM_IOCTL_HW_REFINE:
2555                 return snd_pcm_hw_refine_user(substream, arg);
2556         case SNDRV_PCM_IOCTL_HW_PARAMS:
2557                 return snd_pcm_hw_params_user(substream, arg);
2558         case SNDRV_PCM_IOCTL_HW_FREE:
2559                 return snd_pcm_hw_free(substream);
2560         case SNDRV_PCM_IOCTL_SW_PARAMS:
2561                 return snd_pcm_sw_params_user(substream, arg);
2562         case SNDRV_PCM_IOCTL_STATUS:
2563                 return snd_pcm_status_user(substream, arg);
2564         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2565                 return snd_pcm_channel_info_user(substream, arg);
2566         case SNDRV_PCM_IOCTL_PREPARE:
2567                 return snd_pcm_prepare(substream, file);
2568         case SNDRV_PCM_IOCTL_RESET:
2569                 return snd_pcm_reset(substream);
2570         case SNDRV_PCM_IOCTL_START:
2571                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2572         case SNDRV_PCM_IOCTL_LINK:
2573                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2574         case SNDRV_PCM_IOCTL_UNLINK:
2575                 return snd_pcm_unlink(substream);
2576         case SNDRV_PCM_IOCTL_RESUME:
2577                 return snd_pcm_resume(substream);
2578         case SNDRV_PCM_IOCTL_XRUN:
2579                 return snd_pcm_xrun(substream);
2580         case SNDRV_PCM_IOCTL_HWSYNC:
2581                 return snd_pcm_hwsync(substream);
2582         case SNDRV_PCM_IOCTL_DELAY:
2583                 return snd_pcm_delay(substream, arg);
2584         case SNDRV_PCM_IOCTL_SYNC_PTR:
2585                 return snd_pcm_sync_ptr(substream, arg);
2586 #ifdef CONFIG_SND_SUPPORT_OLD_API
2587         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2588                 return snd_pcm_hw_refine_old_user(substream, arg);
2589         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2590                 return snd_pcm_hw_params_old_user(substream, arg);
2591 #endif
2592         case SNDRV_PCM_IOCTL_DRAIN:
2593                 return snd_pcm_drain(substream, file);
2594         case SNDRV_PCM_IOCTL_DROP:
2595                 return snd_pcm_drop(substream);
2596         case SNDRV_PCM_IOCTL_PAUSE:
2597         {
2598                 int res;
2599                 snd_pcm_stream_lock_irq(substream);
2600                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2601                 snd_pcm_stream_unlock_irq(substream);
2602                 return res;
2603         }
2604         }
2605         snd_printd("unknown ioctl = 0x%x\n", cmd);
2606         return -ENOTTY;
2607 }
2608
2609 static int snd_pcm_playback_ioctl1(struct file *file,
2610                                    struct snd_pcm_substream *substream,
2611                                    unsigned int cmd, void __user *arg)
2612 {
2613         if (snd_BUG_ON(!substream))
2614                 return -ENXIO;
2615         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2616                 return -EINVAL;
2617         switch (cmd) {
2618         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2619         {
2620                 struct snd_xferi xferi;
2621                 struct snd_xferi __user *_xferi = arg;
2622                 struct snd_pcm_runtime *runtime = substream->runtime;
2623                 snd_pcm_sframes_t result;
2624                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2625                         return -EBADFD;
2626                 if (put_user(0, &_xferi->result))
2627                         return -EFAULT;
2628                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2629                         return -EFAULT;
2630                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2631                 __put_user(result, &_xferi->result);
2632                 return result < 0 ? result : 0;
2633         }
2634         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2635         {
2636                 struct snd_xfern xfern;
2637                 struct snd_xfern __user *_xfern = arg;
2638                 struct snd_pcm_runtime *runtime = substream->runtime;
2639                 void __user **bufs;
2640                 snd_pcm_sframes_t result;
2641                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2642                         return -EBADFD;
2643                 if (runtime->channels > 128)
2644                         return -EINVAL;
2645                 if (put_user(0, &_xfern->result))
2646                         return -EFAULT;
2647                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2648                         return -EFAULT;
2649
2650                 bufs = memdup_user(xfern.bufs,
2651                                    sizeof(void *) * runtime->channels);
2652                 if (IS_ERR(bufs))
2653                         return PTR_ERR(bufs);
2654                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2655                 kfree(bufs);
2656                 __put_user(result, &_xfern->result);
2657                 return result < 0 ? result : 0;
2658         }
2659         case SNDRV_PCM_IOCTL_REWIND:
2660         {
2661                 snd_pcm_uframes_t frames;
2662                 snd_pcm_uframes_t __user *_frames = arg;
2663                 snd_pcm_sframes_t result;
2664                 if (get_user(frames, _frames))
2665                         return -EFAULT;
2666                 if (put_user(0, _frames))
2667                         return -EFAULT;
2668                 result = snd_pcm_playback_rewind(substream, frames);
2669                 __put_user(result, _frames);
2670                 return result < 0 ? result : 0;
2671         }
2672         case SNDRV_PCM_IOCTL_FORWARD:
2673         {
2674                 snd_pcm_uframes_t frames;
2675                 snd_pcm_uframes_t __user *_frames = arg;
2676                 snd_pcm_sframes_t result;
2677                 if (get_user(frames, _frames))
2678                         return -EFAULT;
2679                 if (put_user(0, _frames))
2680                         return -EFAULT;
2681                 result = snd_pcm_playback_forward(substream, frames);
2682                 __put_user(result, _frames);
2683                 return result < 0 ? result : 0;
2684         }
2685         }
2686         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2687 }
2688
2689 static int snd_pcm_capture_ioctl1(struct file *file,
2690                                   struct snd_pcm_substream *substream,
2691                                   unsigned int cmd, void __user *arg)
2692 {
2693         if (snd_BUG_ON(!substream))
2694                 return -ENXIO;
2695         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2696                 return -EINVAL;
2697         switch (cmd) {
2698         case SNDRV_PCM_IOCTL_READI_FRAMES:
2699         {
2700                 struct snd_xferi xferi;
2701                 struct snd_xferi __user *_xferi = arg;
2702                 struct snd_pcm_runtime *runtime = substream->runtime;
2703                 snd_pcm_sframes_t result;
2704                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2705                         return -EBADFD;
2706                 if (put_user(0, &_xferi->result))
2707                         return -EFAULT;
2708                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2709                         return -EFAULT;
2710                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2711                 __put_user(result, &_xferi->result);
2712                 return result < 0 ? result : 0;
2713         }
2714         case SNDRV_PCM_IOCTL_READN_FRAMES:
2715         {
2716                 struct snd_xfern xfern;
2717                 struct snd_xfern __user *_xfern = arg;
2718                 struct snd_pcm_runtime *runtime = substream->runtime;
2719                 void *bufs;
2720                 snd_pcm_sframes_t result;
2721                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2722                         return -EBADFD;
2723                 if (runtime->channels > 128)
2724                         return -EINVAL;
2725                 if (put_user(0, &_xfern->result))
2726                         return -EFAULT;
2727                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2728                         return -EFAULT;
2729
2730                 bufs = memdup_user(xfern.bufs,
2731                                    sizeof(void *) * runtime->channels);
2732                 if (IS_ERR(bufs))
2733                         return PTR_ERR(bufs);
2734                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2735                 kfree(bufs);
2736                 __put_user(result, &_xfern->result);
2737                 return result < 0 ? result : 0;
2738         }
2739         case SNDRV_PCM_IOCTL_REWIND:
2740         {
2741                 snd_pcm_uframes_t frames;
2742                 snd_pcm_uframes_t __user *_frames = arg;
2743                 snd_pcm_sframes_t result;
2744                 if (get_user(frames, _frames))
2745                         return -EFAULT;
2746                 if (put_user(0, _frames))
2747                         return -EFAULT;
2748                 result = snd_pcm_capture_rewind(substream, frames);
2749                 __put_user(result, _frames);
2750                 return result < 0 ? result : 0;
2751         }
2752         case SNDRV_PCM_IOCTL_FORWARD:
2753         {
2754                 snd_pcm_uframes_t frames;
2755                 snd_pcm_uframes_t __user *_frames = arg;
2756                 snd_pcm_sframes_t result;
2757                 if (get_user(frames, _frames))
2758                         return -EFAULT;
2759                 if (put_user(0, _frames))
2760                         return -EFAULT;
2761                 result = snd_pcm_capture_forward(substream, frames);
2762                 __put_user(result, _frames);
2763                 return result < 0 ? result : 0;
2764         }
2765         }
2766         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2767 }
2768
2769 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2770                                    unsigned long arg)
2771 {
2772         struct snd_pcm_file *pcm_file;
2773
2774         pcm_file = file->private_data;
2775
2776         if (((cmd >> 8) & 0xff) != 'A')
2777                 return -ENOTTY;
2778
2779         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2780                                        (void __user *)arg);
2781 }
2782
2783 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2784                                   unsigned long arg)
2785 {
2786         struct snd_pcm_file *pcm_file;
2787
2788         pcm_file = file->private_data;
2789
2790         if (((cmd >> 8) & 0xff) != 'A')
2791                 return -ENOTTY;
2792
2793         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2794                                       (void __user *)arg);
2795 }
2796
2797 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2798                          unsigned int cmd, void *arg)
2799 {
2800         mm_segment_t fs;
2801         int result;
2802
2803         fs = snd_enter_user();
2804         switch (substream->stream) {
2805         case SNDRV_PCM_STREAM_PLAYBACK:
2806                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2807                                                  (void __user *)arg);
2808                 break;
2809         case SNDRV_PCM_STREAM_CAPTURE:
2810                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2811                                                 (void __user *)arg);
2812                 break;
2813         default:
2814                 result = -EINVAL;
2815                 break;
2816         }
2817         snd_leave_user(fs);
2818         return result;
2819 }
2820
2821 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2822
2823 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2824                             loff_t * offset)
2825 {
2826         struct snd_pcm_file *pcm_file;
2827         struct snd_pcm_substream *substream;
2828         struct snd_pcm_runtime *runtime;
2829         snd_pcm_sframes_t result;
2830
2831         pcm_file = file->private_data;
2832         substream = pcm_file->substream;
2833         if (PCM_RUNTIME_CHECK(substream))
2834                 return -ENXIO;
2835         runtime = substream->runtime;
2836         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2837                 return -EBADFD;
2838         if (!frame_aligned(runtime, count))
2839                 return -EINVAL;
2840         count = bytes_to_frames(runtime, count);
2841         result = snd_pcm_lib_read(substream, buf, count);
2842         if (result > 0)
2843                 result = frames_to_bytes(runtime, result);
2844         return result;
2845 }
2846
2847 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2848                              size_t count, loff_t * offset)
2849 {
2850         struct snd_pcm_file *pcm_file;
2851         struct snd_pcm_substream *substream;
2852         struct snd_pcm_runtime *runtime;
2853         snd_pcm_sframes_t result;
2854
2855         pcm_file = file->private_data;
2856         substream = pcm_file->substream;
2857         if (PCM_RUNTIME_CHECK(substream))
2858                 return -ENXIO;
2859         runtime = substream->runtime;
2860         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2861                 return -EBADFD;
2862         if (!frame_aligned(runtime, count))
2863                 return -EINVAL;
2864         count = bytes_to_frames(runtime, count);
2865         result = snd_pcm_lib_write(substream, buf, count);
2866         if (result > 0)
2867                 result = frames_to_bytes(runtime, result);
2868         return result;
2869 }
2870
2871 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2872                              unsigned long nr_segs, loff_t pos)
2873
2874 {
2875         struct snd_pcm_file *pcm_file;
2876         struct snd_pcm_substream *substream;
2877         struct snd_pcm_runtime *runtime;
2878         snd_pcm_sframes_t result;
2879         unsigned long i;
2880         void __user **bufs;
2881         snd_pcm_uframes_t frames;
2882
2883         pcm_file = iocb->ki_filp->private_data;
2884         substream = pcm_file->substream;
2885         if (PCM_RUNTIME_CHECK(substream))
2886                 return -ENXIO;
2887         runtime = substream->runtime;
2888         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2889                 return -EBADFD;
2890         if (nr_segs > 1024 || nr_segs != runtime->channels)
2891                 return -EINVAL;
2892         if (!frame_aligned(runtime, iov->iov_len))
2893                 return -EINVAL;
2894         frames = bytes_to_samples(runtime, iov->iov_len);
2895         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2896         if (bufs == NULL)
2897                 return -ENOMEM;
2898         for (i = 0; i < nr_segs; ++i)
2899                 bufs[i] = iov[i].iov_base;
2900         result = snd_pcm_lib_readv(substream, bufs, frames);
2901         if (result > 0)
2902                 result = frames_to_bytes(runtime, result);
2903         kfree(bufs);
2904         return result;
2905 }
2906
2907 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2908                               unsigned long nr_segs, loff_t pos)
2909 {
2910         struct snd_pcm_file *pcm_file;
2911         struct snd_pcm_substream *substream;
2912         struct snd_pcm_runtime *runtime;
2913         snd_pcm_sframes_t result;
2914         unsigned long i;
2915         void __user **bufs;
2916         snd_pcm_uframes_t frames;
2917
2918         pcm_file = iocb->ki_filp->private_data;
2919         substream = pcm_file->substream;
2920         if (PCM_RUNTIME_CHECK(substream))
2921                 return -ENXIO;
2922         runtime = substream->runtime;
2923         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2924                 return -EBADFD;
2925         if (nr_segs > 128 || nr_segs != runtime->channels ||
2926             !frame_aligned(runtime, iov->iov_len))
2927                 return -EINVAL;
2928         frames = bytes_to_samples(runtime, iov->iov_len);
2929         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2930         if (bufs == NULL)
2931                 return -ENOMEM;
2932         for (i = 0; i < nr_segs; ++i)
2933                 bufs[i] = iov[i].iov_base;
2934         result = snd_pcm_lib_writev(substream, bufs, frames);
2935         if (result > 0)
2936                 result = frames_to_bytes(runtime, result);
2937         kfree(bufs);
2938         return result;
2939 }
2940
2941 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2942 {
2943         struct snd_pcm_file *pcm_file;
2944         struct snd_pcm_substream *substream;
2945         struct snd_pcm_runtime *runtime;
2946         unsigned int mask;
2947         snd_pcm_uframes_t avail;
2948
2949         pcm_file = file->private_data;
2950
2951         substream = pcm_file->substream;
2952         if (PCM_RUNTIME_CHECK(substream))
2953                 return -ENXIO;
2954         runtime = substream->runtime;
2955
2956         poll_wait(file, &runtime->sleep, wait);
2957
2958         snd_pcm_stream_lock_irq(substream);
2959         avail = snd_pcm_playback_avail(runtime);
2960         switch (runtime->status->state) {
2961         case SNDRV_PCM_STATE_RUNNING:
2962         case SNDRV_PCM_STATE_PREPARED:
2963         case SNDRV_PCM_STATE_PAUSED:
2964                 if (avail >= runtime->control->avail_min) {
2965                         mask = POLLOUT | POLLWRNORM;
2966                         break;
2967                 }
2968                 /* Fall through */
2969         case SNDRV_PCM_STATE_DRAINING:
2970                 mask = 0;
2971                 break;
2972         default:
2973                 mask = POLLOUT | POLLWRNORM | POLLERR;
2974                 break;
2975         }
2976         snd_pcm_stream_unlock_irq(substream);
2977         return mask;
2978 }
2979
2980 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2981 {
2982         struct snd_pcm_file *pcm_file;
2983         struct snd_pcm_substream *substream;
2984         struct snd_pcm_runtime *runtime;
2985         unsigned int mask;
2986         snd_pcm_uframes_t avail;
2987
2988         pcm_file = file->private_data;
2989
2990         substream = pcm_file->substream;
2991         if (PCM_RUNTIME_CHECK(substream))
2992                 return -ENXIO;
2993         runtime = substream->runtime;
2994
2995         poll_wait(file, &runtime->sleep, wait);
2996
2997         snd_pcm_stream_lock_irq(substream);
2998         avail = snd_pcm_capture_avail(runtime);
2999         switch (runtime->status->state) {
3000         case SNDRV_PCM_STATE_RUNNING:
3001         case SNDRV_PCM_STATE_PREPARED:
3002         case SNDRV_PCM_STATE_PAUSED:
3003                 if (avail >= runtime->control->avail_min) {
3004                         mask = POLLIN | POLLRDNORM;
3005                         break;
3006                 }
3007                 mask = 0;
3008                 break;
3009         case SNDRV_PCM_STATE_DRAINING:
3010                 if (avail > 0) {
3011                         mask = POLLIN | POLLRDNORM;
3012                         break;
3013                 }
3014                 /* Fall through */
3015         default:
3016                 mask = POLLIN | POLLRDNORM | POLLERR;
3017                 break;
3018         }
3019         snd_pcm_stream_unlock_irq(substream);
3020         return mask;
3021 }
3022
3023 /*
3024  * mmap support
3025  */
3026
3027 /*
3028  * Only on coherent architectures, we can mmap the status and the control records
3029  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
3030  */
3031 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3032 /*
3033  * mmap status record
3034  */
3035 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3036                                                 struct vm_fault *vmf)
3037 {
3038         struct snd_pcm_substream *substream = area->vm_private_data;
3039         struct snd_pcm_runtime *runtime;
3040
3041         if (substream == NULL)
3042                 return VM_FAULT_SIGBUS;
3043         runtime = substream->runtime;
3044         vmf->page = virt_to_page(runtime->status);
3045         get_page(vmf->page);
3046         return 0;
3047 }
3048
3049 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3050 {
3051         .fault =        snd_pcm_mmap_status_fault,
3052 };
3053
3054 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3055                                struct vm_area_struct *area)
3056 {
3057         long size;
3058         if (!(area->vm_flags & VM_READ))
3059                 return -EINVAL;
3060         size = area->vm_end - area->vm_start;
3061         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3062                 return -EINVAL;
3063         area->vm_ops = &snd_pcm_vm_ops_status;
3064         area->vm_private_data = substream;
3065         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3066         return 0;
3067 }
3068
3069 /*
3070  * mmap control record
3071  */
3072 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3073                                                 struct vm_fault *vmf)
3074 {
3075         struct snd_pcm_substream *substream = area->vm_private_data;
3076         struct snd_pcm_runtime *runtime;
3077
3078         if (substream == NULL)
3079                 return VM_FAULT_SIGBUS;
3080         runtime = substream->runtime;
3081         vmf->page = virt_to_page(runtime->control);
3082         get_page(vmf->page);
3083         return 0;
3084 }
3085
3086 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3087 {
3088         .fault =        snd_pcm_mmap_control_fault,
3089 };
3090
3091 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3092                                 struct vm_area_struct *area)
3093 {
3094         long size;
3095         if (!(area->vm_flags & VM_READ))
3096                 return -EINVAL;
3097         size = area->vm_end - area->vm_start;
3098         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3099                 return -EINVAL;
3100         area->vm_ops = &snd_pcm_vm_ops_control;
3101         area->vm_private_data = substream;
3102         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3103         return 0;
3104 }
3105 #else /* ! coherent mmap */
3106 /*
3107  * don't support mmap for status and control records.
3108  */
3109 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3110                                struct vm_area_struct *area)
3111 {
3112         return -ENXIO;
3113 }
3114 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3115                                 struct vm_area_struct *area)
3116 {
3117         return -ENXIO;
3118 }
3119 #endif /* coherent mmap */
3120
3121 static inline struct page *
3122 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3123 {
3124         void *vaddr = substream->runtime->dma_area + ofs;
3125 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3126         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3127                 return virt_to_page(CAC_ADDR(vaddr));
3128 #endif
3129 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3130         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3131                 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3132                 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3133                 /* assume dma_handle set via pfn_to_phys() in
3134                  * mm/dma-noncoherent.c
3135                  */
3136                 return pfn_to_page(addr >> PAGE_SHIFT);
3137         }
3138 #endif
3139         return virt_to_page(vaddr);
3140 }
3141
3142 /*
3143  * fault callback for mmapping a RAM page
3144  */
3145 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3146                                                 struct vm_fault *vmf)
3147 {
3148         struct snd_pcm_substream *substream = area->vm_private_data;
3149         struct snd_pcm_runtime *runtime;
3150         unsigned long offset;
3151         struct page * page;
3152         size_t dma_bytes;
3153
3154         if (substream == NULL)
3155                 return VM_FAULT_SIGBUS;
3156         runtime = substream->runtime;
3157         offset = vmf->pgoff << PAGE_SHIFT;
3158         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3159         if (offset > dma_bytes - PAGE_SIZE)
3160                 return VM_FAULT_SIGBUS;
3161         if (substream->ops->page)
3162                 page = substream->ops->page(substream, offset);
3163         else
3164                 page = snd_pcm_default_page_ops(substream, offset);
3165         if (!page)
3166                 return VM_FAULT_SIGBUS;
3167         get_page(page);
3168         vmf->page = page;
3169         return 0;
3170 }
3171
3172 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3173         .open =         snd_pcm_mmap_data_open,
3174         .close =        snd_pcm_mmap_data_close,
3175 };
3176
3177 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3178         .open =         snd_pcm_mmap_data_open,
3179         .close =        snd_pcm_mmap_data_close,
3180         .fault =        snd_pcm_mmap_data_fault,
3181 };
3182
3183 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3184 /* This should be defined / handled globally! */
3185 #ifdef CONFIG_ARM
3186 #define ARCH_HAS_DMA_MMAP_COHERENT
3187 #endif
3188 #endif
3189
3190 /*
3191  * mmap the DMA buffer on RAM
3192  */
3193 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3194                              struct vm_area_struct *area)
3195 {
3196         area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3197 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3198         if (!substream->ops->page &&
3199             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3200                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3201                                          area,
3202                                          substream->runtime->dma_area,
3203                                          substream->runtime->dma_addr,
3204                                          area->vm_end - area->vm_start);
3205 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3206         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3207             !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3208                 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3209 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3210         /* mmap with fault handler */
3211         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3212         return 0;
3213 }
3214 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3215
3216 /*
3217  * mmap the DMA buffer on I/O memory area
3218  */
3219 #if SNDRV_PCM_INFO_MMAP_IOMEM
3220 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3221                            struct vm_area_struct *area)
3222 {
3223         long size;
3224         unsigned long offset;
3225
3226         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3227         area->vm_flags |= VM_IO;
3228         size = area->vm_end - area->vm_start;
3229         offset = area->vm_pgoff << PAGE_SHIFT;
3230         if (io_remap_pfn_range(area, area->vm_start,
3231                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3232                                 size, area->vm_page_prot))
3233                 return -EAGAIN;
3234         return 0;
3235 }
3236
3237 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3238 #endif /* SNDRV_PCM_INFO_MMAP */
3239
3240 /*
3241  * mmap DMA buffer
3242  */
3243 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3244                       struct vm_area_struct *area)
3245 {
3246         struct snd_pcm_runtime *runtime;
3247         long size;
3248         unsigned long offset;
3249         size_t dma_bytes;
3250         int err;
3251
3252         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3253                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3254                         return -EINVAL;
3255         } else {
3256                 if (!(area->vm_flags & VM_READ))
3257                         return -EINVAL;
3258         }
3259         runtime = substream->runtime;
3260         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3261                 return -EBADFD;
3262         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3263                 return -ENXIO;
3264         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3265             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3266                 return -EINVAL;
3267         size = area->vm_end - area->vm_start;
3268         offset = area->vm_pgoff << PAGE_SHIFT;
3269         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3270         if ((size_t)size > dma_bytes)
3271                 return -EINVAL;
3272         if (offset > dma_bytes - size)
3273                 return -EINVAL;
3274
3275         area->vm_ops = &snd_pcm_vm_ops_data;
3276         area->vm_private_data = substream;
3277         if (substream->ops->mmap)
3278                 err = substream->ops->mmap(substream, area);
3279         else
3280                 err = snd_pcm_lib_default_mmap(substream, area);
3281         if (!err)
3282                 atomic_inc(&substream->mmap_count);
3283         return err;
3284 }
3285
3286 EXPORT_SYMBOL(snd_pcm_mmap_data);
3287
3288 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3289 {
3290         struct snd_pcm_file * pcm_file;
3291         struct snd_pcm_substream *substream;
3292         unsigned long offset;
3293
3294         pcm_file = file->private_data;
3295         substream = pcm_file->substream;
3296         if (PCM_RUNTIME_CHECK(substream))
3297                 return -ENXIO;
3298
3299         offset = area->vm_pgoff << PAGE_SHIFT;
3300         switch (offset) {
3301         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3302                 if (pcm_file->no_compat_mmap)
3303                         return -ENXIO;
3304                 return snd_pcm_mmap_status(substream, file, area);
3305         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3306                 if (pcm_file->no_compat_mmap)
3307                         return -ENXIO;
3308                 return snd_pcm_mmap_control(substream, file, area);
3309         default:
3310                 return snd_pcm_mmap_data(substream, file, area);
3311         }
3312         return 0;
3313 }
3314
3315 static int snd_pcm_fasync(int fd, struct file * file, int on)
3316 {
3317         struct snd_pcm_file * pcm_file;
3318         struct snd_pcm_substream *substream;
3319         struct snd_pcm_runtime *runtime;
3320
3321         pcm_file = file->private_data;
3322         substream = pcm_file->substream;
3323         if (PCM_RUNTIME_CHECK(substream))
3324                 return -ENXIO;
3325         runtime = substream->runtime;
3326         return fasync_helper(fd, file, on, &runtime->fasync);
3327 }
3328
3329 /*
3330  * ioctl32 compat
3331  */
3332 #ifdef CONFIG_COMPAT
3333 #include "pcm_compat.c"
3334 #else
3335 #define snd_pcm_ioctl_compat    NULL
3336 #endif
3337
3338 /*
3339  *  To be removed helpers to keep binary compatibility
3340  */
3341
3342 #ifdef CONFIG_SND_SUPPORT_OLD_API
3343 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3344 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3345
3346 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3347                                                struct snd_pcm_hw_params_old *oparams)
3348 {
3349         unsigned int i;
3350
3351         memset(params, 0, sizeof(*params));
3352         params->flags = oparams->flags;
3353         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3354                 params->masks[i].bits[0] = oparams->masks[i];
3355         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3356         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3357         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3358         params->info = oparams->info;
3359         params->msbits = oparams->msbits;
3360         params->rate_num = oparams->rate_num;
3361         params->rate_den = oparams->rate_den;
3362         params->fifo_size = oparams->fifo_size;
3363 }
3364
3365 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3366                                              struct snd_pcm_hw_params *params)
3367 {
3368         unsigned int i;
3369
3370         memset(oparams, 0, sizeof(*oparams));
3371         oparams->flags = params->flags;
3372         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3373                 oparams->masks[i] = params->masks[i].bits[0];
3374         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3375         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3376         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3377         oparams->info = params->info;
3378         oparams->msbits = params->msbits;
3379         oparams->rate_num = params->rate_num;
3380         oparams->rate_den = params->rate_den;
3381         oparams->fifo_size = params->fifo_size;
3382 }
3383
3384 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3385                                       struct snd_pcm_hw_params_old __user * _oparams)
3386 {
3387         struct snd_pcm_hw_params *params;
3388         struct snd_pcm_hw_params_old *oparams = NULL;
3389         int err;
3390
3391         params = kmalloc(sizeof(*params), GFP_KERNEL);
3392         if (!params)
3393                 return -ENOMEM;
3394
3395         oparams = memdup_user(_oparams, sizeof(*oparams));
3396         if (IS_ERR(oparams)) {
3397                 err = PTR_ERR(oparams);
3398                 goto out;
3399         }
3400         snd_pcm_hw_convert_from_old_params(params, oparams);
3401         err = snd_pcm_hw_refine(substream, params);
3402         snd_pcm_hw_convert_to_old_params(oparams, params);
3403         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3404                 if (!err)
3405                         err = -EFAULT;
3406         }
3407
3408         kfree(oparams);
3409 out:
3410         kfree(params);
3411         return err;
3412 }
3413
3414 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3415                                       struct snd_pcm_hw_params_old __user * _oparams)
3416 {
3417         struct snd_pcm_hw_params *params;
3418         struct snd_pcm_hw_params_old *oparams = NULL;
3419         int err;
3420
3421         params = kmalloc(sizeof(*params), GFP_KERNEL);
3422         if (!params)
3423                 return -ENOMEM;
3424
3425         oparams = memdup_user(_oparams, sizeof(*oparams));
3426         if (IS_ERR(oparams)) {
3427                 err = PTR_ERR(oparams);
3428                 goto out;
3429         }
3430         snd_pcm_hw_convert_from_old_params(params, oparams);
3431         err = snd_pcm_hw_params(substream, params);
3432         snd_pcm_hw_convert_to_old_params(oparams, params);
3433         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3434                 if (!err)
3435                         err = -EFAULT;
3436         }
3437
3438         kfree(oparams);
3439 out:
3440         kfree(params);
3441         return err;
3442 }
3443 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3444
3445 #ifndef CONFIG_MMU
3446 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3447                                                unsigned long addr,
3448                                                unsigned long len,
3449                                                unsigned long pgoff,
3450                                                unsigned long flags)
3451 {
3452         struct snd_pcm_file *pcm_file = file->private_data;
3453         struct snd_pcm_substream *substream = pcm_file->substream;
3454         struct snd_pcm_runtime *runtime = substream->runtime;
3455         unsigned long offset = pgoff << PAGE_SHIFT;
3456
3457         switch (offset) {
3458         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3459                 return (unsigned long)runtime->status;
3460         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3461                 return (unsigned long)runtime->control;
3462         default:
3463                 return (unsigned long)runtime->dma_area + offset;
3464         }
3465 }
3466 #else
3467 # define snd_pcm_get_unmapped_area NULL
3468 #endif
3469
3470 /*
3471  *  Register section
3472  */
3473
3474 const struct file_operations snd_pcm_f_ops[2] = {
3475         {
3476                 .owner =                THIS_MODULE,
3477                 .write =                snd_pcm_write,
3478                 .aio_write =            snd_pcm_aio_write,
3479                 .open =                 snd_pcm_playback_open,
3480                 .release =              snd_pcm_release,
3481                 .llseek =               no_llseek,
3482                 .poll =                 snd_pcm_playback_poll,
3483                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3484                 .compat_ioctl =         snd_pcm_ioctl_compat,
3485                 .mmap =                 snd_pcm_mmap,
3486                 .fasync =               snd_pcm_fasync,
3487                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3488         },
3489         {
3490                 .owner =                THIS_MODULE,
3491                 .read =                 snd_pcm_read,
3492                 .aio_read =             snd_pcm_aio_read,
3493                 .open =                 snd_pcm_capture_open,
3494                 .release =              snd_pcm_release,
3495                 .llseek =               no_llseek,
3496                 .poll =                 snd_pcm_capture_poll,
3497                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3498                 .compat_ioctl =         snd_pcm_ioctl_compat,
3499                 .mmap =                 snd_pcm_mmap,
3500                 .fasync =               snd_pcm_fasync,
3501                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3502         }
3503 };