SAFE public projects git trees. - safe/jmp/linux-2.6/blob - sound/core/pcm_native.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include <linux/mm.h>
  23 #include <linux/file.h>
  24 #include <linux/slab.h>
  25 #include <linux/smp_lock.h>
  26 #include <linux/time.h>
  27 #include <linux/pm_qos_params.h>
  28 #include <linux/uio.h>
  29 #include <linux/dma-mapping.h>
  30 #include <linux/math64.h>
  31 #include <sound/core.h>
  32 #include <sound/control.h>
  33 #include <sound/info.h>
  34 #include <sound/pcm.h>
  35 #include <sound/pcm_params.h>
  36 #include <sound/timer.h>
  37 #include <sound/minors.h>
  38 #include <asm/io.h>
  39 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
  40 #include <dma-coherence.h>
  41 #endif
  42
  43 /*
  44  *  Compatibility
  45  */
  46
  47 struct snd_pcm_hw_params_old {
  48         unsigned int flags;
  49         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
  50                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
  51         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
  52                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
  53         unsigned int rmask;
  54         unsigned int cmask;
  55         unsigned int info;
  56         unsigned int msbits;
  57         unsigned int rate_num;
  58         unsigned int rate_den;
  59         snd_pcm_uframes_t fifo_size;
  60         unsigned char reserved[64];
  61 };
  62
  63 #ifdef CONFIG_SND_SUPPORT_OLD_API
  64 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
  65 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
  66
  67 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
  68                                       struct snd_pcm_hw_params_old __user * _oparams);
  69 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
  70                                       struct snd_pcm_hw_params_old __user * _oparams);
  71 #endif
  72 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
  73
  74 /*
  75  *
  76  */
  77
  78 DEFINE_RWLOCK(snd_pcm_link_rwlock);
  79 EXPORT_SYMBOL(snd_pcm_link_rwlock);
  80
  81 static DECLARE_RWSEM(snd_pcm_link_rwsem);
  82
  83 static inline mm_segment_t snd_enter_user(void)
  84 {
  85         mm_segment_t fs = get_fs();
  86         set_fs(get_ds());
  87         return fs;
  88 }
  89
  90 static inline void snd_leave_user(mm_segment_t fs)
  91 {
  92         set_fs(fs);
  93 }
  94
  95
  96
  97 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
  98 {
  99         struct snd_pcm_runtime *runtime;
 100         struct snd_pcm *pcm = substream->pcm;
 101         struct snd_pcm_str *pstr = substream->pstr;
 102
 103         memset(info, 0, sizeof(*info));
 104         info->card = pcm->card->number;
 105         info->device = pcm->device;
 106         info->stream = substream->stream;
 107         info->subdevice = substream->number;
 108         strlcpy(info->id, pcm->id, sizeof(info->id));
 109         strlcpy(info->name, pcm->name, sizeof(info->name));
 110         info->dev_class = pcm->dev_class;
 111         info->dev_subclass = pcm->dev_subclass;
 112         info->subdevices_count = pstr->substream_count;
 113         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 114         strlcpy(info->subname, substream->name, sizeof(info->subname));
 115         runtime = substream->runtime;
 116         /* AB: FIXME!!! This is definitely nonsense */
 117         if (runtime) {
 118                 info->sync = runtime->sync;
 119                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
 120         }
 121         return 0;
 122 }
 123
 124 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 125                       struct snd_pcm_info __user * _info)
 126 {
 127         struct snd_pcm_info *info;
 128         int err;
 129
 130         info = kmalloc(sizeof(*info), GFP_KERNEL);
 131         if (! info)
 132                 return -ENOMEM;
 133         err = snd_pcm_info(substream, info);
 134         if (err >= 0) {
 135                 if (copy_to_user(_info, info, sizeof(*info)))
 136                         err = -EFAULT;
 137         }
 138         kfree(info);
 139         return err;
 140 }
 141
 142 #undef RULES_DEBUG
 143
 144 #ifdef RULES_DEBUG
 145 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
 146 char *snd_pcm_hw_param_names[] = {
 147         HW_PARAM(ACCESS),
 148         HW_PARAM(FORMAT),
 149         HW_PARAM(SUBFORMAT),
 150         HW_PARAM(SAMPLE_BITS),
 151         HW_PARAM(FRAME_BITS),
 152         HW_PARAM(CHANNELS),
 153         HW_PARAM(RATE),
 154         HW_PARAM(PERIOD_TIME),
 155         HW_PARAM(PERIOD_SIZE),
 156         HW_PARAM(PERIOD_BYTES),
 157         HW_PARAM(PERIODS),
 158         HW_PARAM(BUFFER_TIME),
 159         HW_PARAM(BUFFER_SIZE),
 160         HW_PARAM(BUFFER_BYTES),
 161         HW_PARAM(TICK_TIME),
 162 };
 163 #endif
 164
 165 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
 166                       struct snd_pcm_hw_params *params)
 167 {
 168         unsigned int k;
 169         struct snd_pcm_hardware *hw;
 170         struct snd_interval *i = NULL;
 171         struct snd_mask *m = NULL;
 172         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
 173         unsigned int rstamps[constrs->rules_num];
 174         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 175         unsigned int stamp = 2;
 176         int changed, again;
 177
 178         params->info = 0;
 179         params->fifo_size = 0;
 180         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
 181                 params->msbits = 0;
 182         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
 183                 params->rate_num = 0;
 184                 params->rate_den = 0;
 185         }
 186
 187         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
 188                 m = hw_param_mask(params, k);
 189                 if (snd_mask_empty(m))
 190                         return -EINVAL;
 191                 if (!(params->rmask & (1 << k)))
 192                         continue;
 193 #ifdef RULES_DEBUG
 194                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 195                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 196 #endif
 197                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
 198 #ifdef RULES_DEBUG
 199                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 200 #endif
 201                 if (changed)
 202                         params->cmask |= 1 << k;
 203                 if (changed < 0)
 204                         return changed;
 205         }
 206
 207         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
 208                 i = hw_param_interval(params, k);
 209                 if (snd_interval_empty(i))
 210                         return -EINVAL;
 211                 if (!(params->rmask & (1 << k)))
 212                         continue;
 213 #ifdef RULES_DEBUG
 214                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 215                 if (i->empty)
 216                         printk("empty");
 217                 else
 218                         printk("%c%u %u%c",
 219                                i->openmin ? '(' : '[', i->min,
 220                                i->max, i->openmax ? ')' : ']');
 221                 printk(" -> ");
 222 #endif
 223                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
 224 #ifdef RULES_DEBUG
 225                 if (i->empty)
 226                         printk("empty\n");
 227                 else
 228                         printk("%c%u %u%c\n",
 229                                i->openmin ? '(' : '[', i->min,
 230                                i->max, i->openmax ? ')' : ']');
 231 #endif
 232                 if (changed)
 233                         params->cmask |= 1 << k;
 234                 if (changed < 0)
 235                         return changed;
 236         }
 237
 238         for (k = 0; k < constrs->rules_num; k++)
 239                 rstamps[k] = 0;
 240         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
 241                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
 242         do {
 243                 again = 0;
 244                 for (k = 0; k < constrs->rules_num; k++) {
 245                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
 246                         unsigned int d;
 247                         int doit = 0;
 248                         if (r->cond && !(r->cond & params->flags))
 249                                 continue;
 250                         for (d = 0; r->deps[d] >= 0; d++) {
 251                                 if (vstamps[r->deps[d]] > rstamps[k]) {
 252                                         doit = 1;
 253                                         break;
 254                                 }
 255                         }
 256                         if (!doit)
 257                                 continue;
 258 #ifdef RULES_DEBUG
 259                         printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
 260                         if (r->var >= 0) {
 261                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
 262                                 if (hw_is_mask(r->var)) {
 263                                         m = hw_param_mask(params, r->var);
 264                                         printk("%x", *m->bits);
 265                                 } else {
 266                                         i = hw_param_interval(params, r->var);
 267                                         if (i->empty)
 268                                                 printk("empty");
 269                                         else
 270                                                 printk("%c%u %u%c",
 271                                                        i->openmin ? '(' : '[', i->min,
 272                                                        i->max, i->openmax ? ')' : ']');
 273                                 }
 274                         }
 275 #endif
 276                         changed = r->func(params, r);
 277 #ifdef RULES_DEBUG
 278                         if (r->var >= 0) {
 279                                 printk(" -> ");
 280                                 if (hw_is_mask(r->var))
 281                                         printk("%x", *m->bits);
 282                                 else {
 283                                         if (i->empty)
 284                                                 printk("empty");
 285                                         else
 286                                                 printk("%c%u %u%c",
 287                                                        i->openmin ? '(' : '[', i->min,
 288                                                        i->max, i->openmax ? ')' : ']');
 289                                 }
 290                         }
 291                         printk("\n");
 292 #endif
 293                         rstamps[k] = stamp;
 294                         if (changed && r->var >= 0) {
 295                                 params->cmask |= (1 << r->var);
 296                                 vstamps[r->var] = stamp;
 297                                 again = 1;
 298                         }
 299                         if (changed < 0)
 300                                 return changed;
 301                         stamp++;
 302                 }
 303         } while (again);
 304         if (!params->msbits) {
 305                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
 306                 if (snd_interval_single(i))
 307                         params->msbits = snd_interval_value(i);
 308         }
 309
 310         if (!params->rate_den) {
 311                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 312                 if (snd_interval_single(i)) {
 313                         params->rate_num = snd_interval_value(i);
 314                         params->rate_den = 1;
 315                 }
 316         }
 317
 318         hw = &substream->runtime->hw;
 319         if (!params->info)
 320                 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
 321         if (!params->fifo_size) {
 322                 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 323                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 324                 if (snd_mask_min(m) == snd_mask_max(m) &&
 325                     snd_interval_min(i) == snd_interval_max(i)) {
 326                         changed = substream->ops->ioctl(substream,
 327                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
 328                         if (changed < 0)
 329                                 return changed;
 330                 }
 331         }
 332         params->rmask = 0;
 333         return 0;
 334 }
 335
 336 EXPORT_SYMBOL(snd_pcm_hw_refine);
 337
 338 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 339                                   struct snd_pcm_hw_params __user * _params)
 340 {
 341         struct snd_pcm_hw_params *params;
 342         int err;
 343
 344         params = memdup_user(_params, sizeof(*params));
 345         if (IS_ERR(params))
 346                 return PTR_ERR(params);
 347
 348         err = snd_pcm_hw_refine(substream, params);
 349         if (copy_to_user(_params, params, sizeof(*params))) {
 350                 if (!err)
 351                         err = -EFAULT;
 352         }
 353
 354         kfree(params);
 355         return err;
 356 }
 357
 358 static int period_to_usecs(struct snd_pcm_runtime *runtime)
 359 {
 360         int usecs;
 361
 362         if (! runtime->rate)
 363                 return -1; /* invalid */
 364
 365         /* take 75% of period time as the deadline */
 366         usecs = (750000 / runtime->rate) * runtime->period_size;
 367         usecs += ((750000 % runtime->rate) * runtime->period_size) /
 368                 runtime->rate;
 369
 370         return usecs;
 371 }
 372
 373 static int calc_boundary(struct snd_pcm_runtime *runtime)
 374 {
 375         u_int64_t boundary;
 376
 377         boundary = (u_int64_t)runtime->buffer_size *
 378                    (u_int64_t)runtime->period_size;
 379 #if BITS_PER_LONG < 64
 380         /* try to find lowest common multiple for buffer and period */
 381         if (boundary > LONG_MAX - runtime->buffer_size) {
 382                 u_int32_t remainder = -1;
 383                 u_int32_t divident = runtime->buffer_size;
 384                 u_int32_t divisor = runtime->period_size;
 385                 while (remainder) {
 386                         remainder = divident % divisor;
 387                         if (remainder) {
 388                                 divident = divisor;
 389                                 divisor = remainder;
 390                         }
 391                 }
 392                 boundary = div_u64(boundary, divisor);
 393                 if (boundary > LONG_MAX - runtime->buffer_size)
 394                         return -ERANGE;
 395         }
 396 #endif
 397         if (boundary == 0)
 398                 return -ERANGE;
 399         runtime->boundary = boundary;
 400         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 401                 runtime->boundary *= 2;
 402         return 0;
 403 }
 404
 405 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 406                              struct snd_pcm_hw_params *params)
 407 {
 408         struct snd_pcm_runtime *runtime;
 409         int err, usecs;
 410         unsigned int bits;
 411         snd_pcm_uframes_t frames;
 412
 413         if (PCM_RUNTIME_CHECK(substream))
 414                 return -ENXIO;
 415         runtime = substream->runtime;
 416         snd_pcm_stream_lock_irq(substream);
 417         switch (runtime->status->state) {
 418         case SNDRV_PCM_STATE_OPEN:
 419         case SNDRV_PCM_STATE_SETUP:
 420         case SNDRV_PCM_STATE_PREPARED:
 421                 break;
 422         default:
 423                 snd_pcm_stream_unlock_irq(substream);
 424                 return -EBADFD;
 425         }
 426         snd_pcm_stream_unlock_irq(substream);
 427 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 428         if (!substream->oss.oss)
 429 #endif
 430                 if (atomic_read(&substream->mmap_count))
 431                         return -EBADFD;
 432
 433         params->rmask = ~0U;
 434         err = snd_pcm_hw_refine(substream, params);
 435         if (err < 0)
 436                 goto _error;
 437
 438         err = snd_pcm_hw_params_choose(substream, params);
 439         if (err < 0)
 440                 goto _error;
 441
 442         if (substream->ops->hw_params != NULL) {
 443                 err = substream->ops->hw_params(substream, params);
 444                 if (err < 0)
 445                         goto _error;
 446         }
 447
 448         runtime->access = params_access(params);
 449         runtime->format = params_format(params);
 450         runtime->subformat = params_subformat(params);
 451         runtime->channels = params_channels(params);
 452         runtime->rate = params_rate(params);
 453         runtime->period_size = params_period_size(params);
 454         runtime->periods = params_periods(params);
 455         runtime->buffer_size = params_buffer_size(params);
 456         runtime->info = params->info;
 457         runtime->rate_num = params->rate_num;
 458         runtime->rate_den = params->rate_den;
 459
 460         bits = snd_pcm_format_physical_width(runtime->format);
 461         runtime->sample_bits = bits;
 462         bits *= runtime->channels;
 463         runtime->frame_bits = bits;
 464         frames = 1;
 465         while (bits % 8 != 0) {
 466                 bits *= 2;
 467                 frames *= 2;
 468         }
 469         runtime->byte_align = bits / 8;
 470         runtime->min_align = frames;
 471
 472         /* Default sw params */
 473         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 474         runtime->period_step = 1;
 475         runtime->control->avail_min = runtime->period_size;
 476         runtime->start_threshold = 1;
 477         runtime->stop_threshold = runtime->buffer_size;
 478         runtime->silence_threshold = 0;
 479         runtime->silence_size = 0;
 480         err = calc_boundary(runtime);
 481         if (err < 0)
 482                 goto _error;
 483
 484         snd_pcm_timer_resolution_change(substream);
 485         runtime->status->state = SNDRV_PCM_STATE_SETUP;
 486
 487         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
 488                                 substream->latency_id);
 489         if ((usecs = period_to_usecs(runtime)) >= 0)
 490                 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
 491                                         substream->latency_id, usecs);
 492         return 0;
 493  _error:
 494         /* hardware might be unuseable from this time,
 495            so we force application to retry to set
 496            the correct hardware parameter settings */
 497         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 498         if (substream->ops->hw_free != NULL)
 499                 substream->ops->hw_free(substream);
 500         return err;
 501 }
 502
 503 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 504                                   struct snd_pcm_hw_params __user * _params)
 505 {
 506         struct snd_pcm_hw_params *params;
 507         int err;
 508
 509         params = memdup_user(_params, sizeof(*params));
 510         if (IS_ERR(params))
 511                 return PTR_ERR(params);
 512
 513         err = snd_pcm_hw_params(substream, params);
 514         if (copy_to_user(_params, params, sizeof(*params))) {
 515                 if (!err)
 516                         err = -EFAULT;
 517         }
 518
 519         kfree(params);
 520         return err;
 521 }
 522
 523 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 524 {
 525         struct snd_pcm_runtime *runtime;
 526         int result = 0;
 527
 528         if (PCM_RUNTIME_CHECK(substream))
 529                 return -ENXIO;
 530         runtime = substream->runtime;
 531         snd_pcm_stream_lock_irq(substream);
 532         switch (runtime->status->state) {
 533         case SNDRV_PCM_STATE_SETUP:
 534         case SNDRV_PCM_STATE_PREPARED:
 535                 break;
 536         default:
 537                 snd_pcm_stream_unlock_irq(substream);
 538                 return -EBADFD;
 539         }
 540         snd_pcm_stream_unlock_irq(substream);
 541         if (atomic_read(&substream->mmap_count))
 542                 return -EBADFD;
 543         if (substream->ops->hw_free)
 544                 result = substream->ops->hw_free(substream);
 545         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 546         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
 547                 substream->latency_id);
 548         return result;
 549 }
 550
 551 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 552                              struct snd_pcm_sw_params *params)
 553 {
 554         struct snd_pcm_runtime *runtime;
 555         int err;
 556
 557         if (PCM_RUNTIME_CHECK(substream))
 558                 return -ENXIO;
 559         runtime = substream->runtime;
 560         snd_pcm_stream_lock_irq(substream);
 561         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 562                 snd_pcm_stream_unlock_irq(substream);
 563                 return -EBADFD;
 564         }
 565         snd_pcm_stream_unlock_irq(substream);
 566
 567         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 568                 return -EINVAL;
 569         if (params->avail_min == 0)
 570                 return -EINVAL;
 571         if (params->silence_size >= runtime->boundary) {
 572                 if (params->silence_threshold != 0)
 573                         return -EINVAL;
 574         } else {
 575                 if (params->silence_size > params->silence_threshold)
 576                         return -EINVAL;
 577                 if (params->silence_threshold > runtime->buffer_size)
 578                         return -EINVAL;
 579         }
 580         err = 0;
 581         snd_pcm_stream_lock_irq(substream);
 582         runtime->tstamp_mode = params->tstamp_mode;
 583         runtime->period_step = params->period_step;
 584         runtime->control->avail_min = params->avail_min;
 585         runtime->start_threshold = params->start_threshold;
 586         runtime->stop_threshold = params->stop_threshold;
 587         runtime->silence_threshold = params->silence_threshold;
 588         runtime->silence_size = params->silence_size;
 589         params->boundary = runtime->boundary;
 590         if (snd_pcm_running(substream)) {
 591                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 592                     runtime->silence_size > 0)
 593                         snd_pcm_playback_silence(substream, ULONG_MAX);
 594                 err = snd_pcm_update_state(substream, runtime);
 595         }
 596         snd_pcm_stream_unlock_irq(substream);
 597         return err;
 598 }
 599
 600 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 601                                   struct snd_pcm_sw_params __user * _params)
 602 {
 603         struct snd_pcm_sw_params params;
 604         int err;
 605         if (copy_from_user(&params, _params, sizeof(params)))
 606                 return -EFAULT;
 607         err = snd_pcm_sw_params(substream, &params);
 608         if (copy_to_user(_params, &params, sizeof(params)))
 609                 return -EFAULT;
 610         return err;
 611 }
 612
 613 int snd_pcm_status(struct snd_pcm_substream *substream,
 614                    struct snd_pcm_status *status)
 615 {
 616         struct snd_pcm_runtime *runtime = substream->runtime;
 617
 618         snd_pcm_stream_lock_irq(substream);
 619         status->state = runtime->status->state;
 620         status->suspended_state = runtime->status->suspended_state;
 621         if (status->state == SNDRV_PCM_STATE_OPEN)
 622                 goto _end;
 623         status->trigger_tstamp = runtime->trigger_tstamp;
 624         if (snd_pcm_running(substream)) {
 625                 snd_pcm_update_hw_ptr(substream);
 626                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
 627                         status->tstamp = runtime->status->tstamp;
 628                         goto _tstamp_end;
 629                 }
 630         }
 631         snd_pcm_gettime(runtime, &status->tstamp);
 632  _tstamp_end:
 633         status->appl_ptr = runtime->control->appl_ptr;
 634         status->hw_ptr = runtime->status->hw_ptr;
 635         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 636                 status->avail = snd_pcm_playback_avail(runtime);
 637                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 638                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 639                         status->delay = runtime->buffer_size - status->avail;
 640                         status->delay += runtime->delay;
 641                 } else
 642                         status->delay = 0;
 643         } else {
 644                 status->avail = snd_pcm_capture_avail(runtime);
 645                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 646                         status->delay = status->avail + runtime->delay;
 647                 else
 648                         status->delay = 0;
 649         }
 650         status->avail_max = runtime->avail_max;
 651         status->overrange = runtime->overrange;
 652         runtime->avail_max = 0;
 653         runtime->overrange = 0;
 654  _end:
 655         snd_pcm_stream_unlock_irq(substream);
 656         return 0;
 657 }
 658
 659 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 660                                struct snd_pcm_status __user * _status)
 661 {
 662         struct snd_pcm_status status;
 663         int res;
 664
 665         memset(&status, 0, sizeof(status));
 666         res = snd_pcm_status(substream, &status);
 667         if (res < 0)
 668                 return res;
 669         if (copy_to_user(_status, &status, sizeof(status)))
 670                 return -EFAULT;
 671         return 0;
 672 }
 673
 674 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 675                                 struct snd_pcm_channel_info * info)
 676 {
 677         struct snd_pcm_runtime *runtime;
 678         unsigned int channel;
 679
 680         channel = info->channel;
 681         runtime = substream->runtime;
 682         snd_pcm_stream_lock_irq(substream);
 683         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 684                 snd_pcm_stream_unlock_irq(substream);
 685                 return -EBADFD;
 686         }
 687         snd_pcm_stream_unlock_irq(substream);
 688         if (channel >= runtime->channels)
 689                 return -EINVAL;
 690         memset(info, 0, sizeof(*info));
 691         info->channel = channel;
 692         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 693 }
 694
 695 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 696                                      struct snd_pcm_channel_info __user * _info)
 697 {
 698         struct snd_pcm_channel_info info;
 699         int res;
 700
 701         if (copy_from_user(&info, _info, sizeof(info)))
 702                 return -EFAULT;
 703         res = snd_pcm_channel_info(substream, &info);
 704         if (res < 0)
 705                 return res;
 706         if (copy_to_user(_info, &info, sizeof(info)))
 707                 return -EFAULT;
 708         return 0;
 709 }
 710
 711 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 712 {
 713         struct snd_pcm_runtime *runtime = substream->runtime;
 714         if (runtime->trigger_master == NULL)
 715                 return;
 716         if (runtime->trigger_master == substream) {
 717                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
 718         } else {
 719                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 720                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 721         }
 722         runtime->trigger_master = NULL;
 723 }
 724
 725 struct action_ops {
 726         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 727         int (*do_action)(struct snd_pcm_substream *substream, int state);
 728         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 729         void (*post_action)(struct snd_pcm_substream *substream, int state);
 730 };
 731
 732 /*
 733  *  this functions is core for handling of linked stream
 734  *  Note: the stream state might be changed also on failure
 735  *  Note2: call with calling stream lock + link lock
 736  */
 737 static int snd_pcm_action_group(struct action_ops *ops,
 738                                 struct snd_pcm_substream *substream,
 739                                 int state, int do_lock)
 740 {
 741         struct snd_pcm_substream *s = NULL;
 742         struct snd_pcm_substream *s1;
 743         int res = 0;
 744
 745         snd_pcm_group_for_each_entry(s, substream) {
 746                 if (do_lock && s != substream)
 747                         spin_lock_nested(&s->self_group.lock,
 748                                          SINGLE_DEPTH_NESTING);
 749                 res = ops->pre_action(s, state);
 750                 if (res < 0)
 751                         goto _unlock;
 752         }
 753         snd_pcm_group_for_each_entry(s, substream) {
 754                 res = ops->do_action(s, state);
 755                 if (res < 0) {
 756                         if (ops->undo_action) {
 757                                 snd_pcm_group_for_each_entry(s1, substream) {
 758                                         if (s1 == s) /* failed stream */
 759                                                 break;
 760                                         ops->undo_action(s1, state);
 761                                 }
 762                         }
 763                         s = NULL; /* unlock all */
 764                         goto _unlock;
 765                 }
 766         }
 767         snd_pcm_group_for_each_entry(s, substream) {
 768                 ops->post_action(s, state);
 769         }
 770  _unlock:
 771         if (do_lock) {
 772                 /* unlock streams */
 773                 snd_pcm_group_for_each_entry(s1, substream) {
 774                         if (s1 != substream)
 775                                 spin_unlock(&s1->self_group.lock);
 776                         if (s1 == s)    /* end */
 777                                 break;
 778                 }
 779         }
 780         return res;
 781 }
 782
 783 /*
 784  *  Note: call with stream lock
 785  */
 786 static int snd_pcm_action_single(struct action_ops *ops,
 787                                  struct snd_pcm_substream *substream,
 788                                  int state)
 789 {
 790         int res;
 791
 792         res = ops->pre_action(substream, state);
 793         if (res < 0)
 794                 return res;
 795         res = ops->do_action(substream, state);
 796         if (res == 0)
 797                 ops->post_action(substream, state);
 798         else if (ops->undo_action)
 799                 ops->undo_action(substream, state);
 800         return res;
 801 }
 802
 803 /*
 804  *  Note: call with stream lock
 805  */
 806 static int snd_pcm_action(struct action_ops *ops,
 807                           struct snd_pcm_substream *substream,
 808                           int state)
 809 {
 810         int res;
 811
 812         if (snd_pcm_stream_linked(substream)) {
 813                 if (!spin_trylock(&substream->group->lock)) {
 814                         spin_unlock(&substream->self_group.lock);
 815                         spin_lock(&substream->group->lock);
 816                         spin_lock(&substream->self_group.lock);
 817                 }
 818                 res = snd_pcm_action_group(ops, substream, state, 1);
 819                 spin_unlock(&substream->group->lock);
 820         } else {
 821                 res = snd_pcm_action_single(ops, substream, state);
 822         }
 823         return res;
 824 }
 825
 826 /*
 827  *  Note: don't use any locks before
 828  */
 829 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 830                                    struct snd_pcm_substream *substream,
 831                                    int state)
 832 {
 833         int res;
 834
 835         read_lock_irq(&snd_pcm_link_rwlock);
 836         if (snd_pcm_stream_linked(substream)) {
 837                 spin_lock(&substream->group->lock);
 838                 spin_lock(&substream->self_group.lock);
 839                 res = snd_pcm_action_group(ops, substream, state, 1);
 840                 spin_unlock(&substream->self_group.lock);
 841                 spin_unlock(&substream->group->lock);
 842         } else {
 843                 spin_lock(&substream->self_group.lock);
 844                 res = snd_pcm_action_single(ops, substream, state);
 845                 spin_unlock(&substream->self_group.lock);
 846         }
 847         read_unlock_irq(&snd_pcm_link_rwlock);
 848         return res;
 849 }
 850
 851 /*
 852  */
 853 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 854                                     struct snd_pcm_substream *substream,
 855                                     int state)
 856 {
 857         int res;
 858
 859         down_read(&snd_pcm_link_rwsem);
 860         if (snd_pcm_stream_linked(substream))
 861                 res = snd_pcm_action_group(ops, substream, state, 0);
 862         else
 863                 res = snd_pcm_action_single(ops, substream, state);
 864         up_read(&snd_pcm_link_rwsem);
 865         return res;
 866 }
 867
 868 /*
 869  * start callbacks
 870  */
 871 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 872 {
 873         struct snd_pcm_runtime *runtime = substream->runtime;
 874         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 875                 return -EBADFD;
 876         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 877             !snd_pcm_playback_data(substream))
 878                 return -EPIPE;
 879         runtime->trigger_master = substream;
 880         return 0;
 881 }
 882
 883 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 884 {
 885         if (substream->runtime->trigger_master != substream)
 886                 return 0;
 887         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
 888 }
 889
 890 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
 891 {
 892         if (substream->runtime->trigger_master == substream)
 893                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 894 }
 895
 896 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
 897 {
 898         struct snd_pcm_runtime *runtime = substream->runtime;
 899         snd_pcm_trigger_tstamp(substream);
 900         runtime->hw_ptr_jiffies = jiffies;
 901         runtime->status->state = state;
 902         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 903             runtime->silence_size > 0)
 904                 snd_pcm_playback_silence(substream, ULONG_MAX);
 905         if (substream->timer)
 906                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
 907                                  &runtime->trigger_tstamp);
 908 }
 909
 910 static struct action_ops snd_pcm_action_start = {
 911         .pre_action = snd_pcm_pre_start,
 912         .do_action = snd_pcm_do_start,
 913         .undo_action = snd_pcm_undo_start,
 914         .post_action = snd_pcm_post_start
 915 };
 916
 917 /**
 918  * snd_pcm_start - start all linked streams
 919  * @substream: the PCM substream instance
 920  */
 921 int snd_pcm_start(struct snd_pcm_substream *substream)
 922 {
 923         return snd_pcm_action(&snd_pcm_action_start, substream,
 924                               SNDRV_PCM_STATE_RUNNING);
 925 }
 926
 927 /*
 928  * stop callbacks
 929  */
 930 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
 931 {
 932         struct snd_pcm_runtime *runtime = substream->runtime;
 933         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 934                 return -EBADFD;
 935         runtime->trigger_master = substream;
 936         return 0;
 937 }
 938
 939 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
 940 {
 941         if (substream->runtime->trigger_master == substream &&
 942             snd_pcm_running(substream))
 943                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 944         return 0; /* unconditonally stop all substreams */
 945 }
 946
 947 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
 948 {
 949         struct snd_pcm_runtime *runtime = substream->runtime;
 950         if (runtime->status->state != state) {
 951                 snd_pcm_trigger_tstamp(substream);
 952                 if (substream->timer)
 953                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
 954                                          &runtime->trigger_tstamp);
 955                 runtime->status->state = state;
 956         }
 957         wake_up(&runtime->sleep);
 958         wake_up(&runtime->tsleep);
 959 }
 960
 961 static struct action_ops snd_pcm_action_stop = {
 962         .pre_action = snd_pcm_pre_stop,
 963         .do_action = snd_pcm_do_stop,
 964         .post_action = snd_pcm_post_stop
 965 };
 966
 967 /**
 968  * snd_pcm_stop - try to stop all running streams in the substream group
 969  * @substream: the PCM substream instance
 970  * @state: PCM state after stopping the stream
 971  *
 972  * The state of each stream is then changed to the given state unconditionally.
 973  */
 974 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
 975 {
 976         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
 977 }
 978
 979 EXPORT_SYMBOL(snd_pcm_stop);
 980
 981 /**
 982  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
 983  * @substream: the PCM substream
 984  *
 985  * After stopping, the state is changed to SETUP.
 986  * Unlike snd_pcm_stop(), this affects only the given stream.
 987  */
 988 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
 989 {
 990         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
 991                                      SNDRV_PCM_STATE_SETUP);
 992 }
 993
 994 /*
 995  * pause callbacks
 996  */
 997 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
 998 {
 999         struct snd_pcm_runtime *runtime = substream->runtime;
1000         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
1001                 return -ENOSYS;
1002         if (push) {
1003                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
1004                         return -EBADFD;
1005         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
1006                 return -EBADFD;
1007         runtime->trigger_master = substream;
1008         return 0;
1009 }
1010
1011 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1012 {
1013         if (substream->runtime->trigger_master != substream)
1014                 return 0;
1015         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1016          * a delta betwen the current jiffies, this gives a large enough
1017          * delta, effectively to skip the check once.
1018          */
1019         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1020         return substream->ops->trigger(substream,
1021                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1022                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1023 }
1024
1025 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1026 {
1027         if (substream->runtime->trigger_master == substream)
1028                 substream->ops->trigger(substream,
1029                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1030                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1031 }
1032
1033 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1034 {
1035         struct snd_pcm_runtime *runtime = substream->runtime;
1036         snd_pcm_trigger_tstamp(substream);
1037         if (push) {
1038                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1039                 if (substream->timer)
1040                         snd_timer_notify(substream->timer,
1041                                          SNDRV_TIMER_EVENT_MPAUSE,
1042                                          &runtime->trigger_tstamp);
1043                 wake_up(&runtime->sleep);
1044                 wake_up(&runtime->tsleep);
1045         } else {
1046                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1047                 if (substream->timer)
1048                         snd_timer_notify(substream->timer,
1049                                          SNDRV_TIMER_EVENT_MCONTINUE,
1050                                          &runtime->trigger_tstamp);
1051         }
1052 }
1053
1054 static struct action_ops snd_pcm_action_pause = {
1055         .pre_action = snd_pcm_pre_pause,
1056         .do_action = snd_pcm_do_pause,
1057         .undo_action = snd_pcm_undo_pause,
1058         .post_action = snd_pcm_post_pause
1059 };
1060
1061 /*
1062  * Push/release the pause for all linked streams.
1063  */
1064 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1065 {
1066         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1067 }
1068
1069 #ifdef CONFIG_PM
1070 /* suspend */
1071
1072 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1073 {
1074         struct snd_pcm_runtime *runtime = substream->runtime;
1075         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1076                 return -EBUSY;
1077         runtime->trigger_master = substream;
1078         return 0;
1079 }
1080
1081 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1082 {
1083         struct snd_pcm_runtime *runtime = substream->runtime;
1084         if (runtime->trigger_master != substream)
1085                 return 0;
1086         if (! snd_pcm_running(substream))
1087                 return 0;
1088         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1089         return 0; /* suspend unconditionally */
1090 }
1091
1092 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1093 {
1094         struct snd_pcm_runtime *runtime = substream->runtime;
1095         snd_pcm_trigger_tstamp(substream);
1096         if (substream->timer)
1097                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1098                                  &runtime->trigger_tstamp);
1099         runtime->status->suspended_state = runtime->status->state;
1100         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1101         wake_up(&runtime->sleep);
1102         wake_up(&runtime->tsleep);
1103 }
1104
1105 static struct action_ops snd_pcm_action_suspend = {
1106         .pre_action = snd_pcm_pre_suspend,
1107         .do_action = snd_pcm_do_suspend,
1108         .post_action = snd_pcm_post_suspend
1109 };
1110
1111 /**
1112  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1113  * @substream: the PCM substream
1114  *
1115  * After this call, all streams are changed to SUSPENDED state.
1116  */
1117 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1118 {
1119         int err;
1120         unsigned long flags;
1121
1122         if (! substream)
1123                 return 0;
1124
1125         snd_pcm_stream_lock_irqsave(substream, flags);
1126         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1127         snd_pcm_stream_unlock_irqrestore(substream, flags);
1128         return err;
1129 }
1130
1131 EXPORT_SYMBOL(snd_pcm_suspend);
1132
1133 /**
1134  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1135  * @pcm: the PCM instance
1136  *
1137  * After this call, all streams are changed to SUSPENDED state.
1138  */
1139 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1140 {
1141         struct snd_pcm_substream *substream;
1142         int stream, err = 0;
1143
1144         if (! pcm)
1145                 return 0;
1146
1147         for (stream = 0; stream < 2; stream++) {
1148                 for (substream = pcm->streams[stream].substream;
1149                      substream; substream = substream->next) {
1150                         /* FIXME: the open/close code should lock this as well */
1151                         if (substream->runtime == NULL)
1152                                 continue;
1153                         err = snd_pcm_suspend(substream);
1154                         if (err < 0 && err != -EBUSY)
1155                                 return err;
1156                 }
1157         }
1158         return 0;
1159 }
1160
1161 EXPORT_SYMBOL(snd_pcm_suspend_all);
1162
1163 /* resume */
1164
1165 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1166 {
1167         struct snd_pcm_runtime *runtime = substream->runtime;
1168         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1169                 return -ENOSYS;
1170         runtime->trigger_master = substream;
1171         return 0;
1172 }
1173
1174 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1175 {
1176         struct snd_pcm_runtime *runtime = substream->runtime;
1177         if (runtime->trigger_master != substream)
1178                 return 0;
1179         /* DMA not running previously? */
1180         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1181             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1182              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1183                 return 0;
1184         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1185 }
1186
1187 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1188 {
1189         if (substream->runtime->trigger_master == substream &&
1190             snd_pcm_running(substream))
1191                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1192 }
1193
1194 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1195 {
1196         struct snd_pcm_runtime *runtime = substream->runtime;
1197         snd_pcm_trigger_tstamp(substream);
1198         if (substream->timer)
1199                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1200                                  &runtime->trigger_tstamp);
1201         runtime->status->state = runtime->status->suspended_state;
1202 }
1203
1204 static struct action_ops snd_pcm_action_resume = {
1205         .pre_action = snd_pcm_pre_resume,
1206         .do_action = snd_pcm_do_resume,
1207         .undo_action = snd_pcm_undo_resume,
1208         .post_action = snd_pcm_post_resume
1209 };
1210
1211 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1212 {
1213         struct snd_card *card = substream->pcm->card;
1214         int res;
1215
1216         snd_power_lock(card);
1217         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1218                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1219         snd_power_unlock(card);
1220         return res;
1221 }
1222
1223 #else
1224
1225 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1226 {
1227         return -ENOSYS;
1228 }
1229
1230 #endif /* CONFIG_PM */
1231
1232 /*
1233  * xrun ioctl
1234  *
1235  * Change the RUNNING stream(s) to XRUN state.
1236  */
1237 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1238 {
1239         struct snd_card *card = substream->pcm->card;
1240         struct snd_pcm_runtime *runtime = substream->runtime;
1241         int result;
1242
1243         snd_power_lock(card);
1244         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1245                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1246                 if (result < 0)
1247                         goto _unlock;
1248         }
1249
1250         snd_pcm_stream_lock_irq(substream);
1251         switch (runtime->status->state) {
1252         case SNDRV_PCM_STATE_XRUN:
1253                 result = 0;     /* already there */
1254                 break;
1255         case SNDRV_PCM_STATE_RUNNING:
1256                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1257                 break;
1258         default:
1259                 result = -EBADFD;
1260         }
1261         snd_pcm_stream_unlock_irq(substream);
1262  _unlock:
1263         snd_power_unlock(card);
1264         return result;
1265 }
1266
1267 /*
1268  * reset ioctl
1269  */
1270 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1271 {
1272         struct snd_pcm_runtime *runtime = substream->runtime;
1273         switch (runtime->status->state) {
1274         case SNDRV_PCM_STATE_RUNNING:
1275         case SNDRV_PCM_STATE_PREPARED:
1276         case SNDRV_PCM_STATE_PAUSED:
1277         case SNDRV_PCM_STATE_SUSPENDED:
1278                 return 0;
1279         default:
1280                 return -EBADFD;
1281         }
1282 }
1283
1284 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1285 {
1286         struct snd_pcm_runtime *runtime = substream->runtime;
1287         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1288         if (err < 0)
1289                 return err;
1290         runtime->hw_ptr_base = 0;
1291         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1292                 runtime->status->hw_ptr % runtime->period_size;
1293         runtime->silence_start = runtime->status->hw_ptr;
1294         runtime->silence_filled = 0;
1295         return 0;
1296 }
1297
1298 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1299 {
1300         struct snd_pcm_runtime *runtime = substream->runtime;
1301         runtime->control->appl_ptr = runtime->status->hw_ptr;
1302         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1303             runtime->silence_size > 0)
1304                 snd_pcm_playback_silence(substream, ULONG_MAX);
1305 }
1306
1307 static struct action_ops snd_pcm_action_reset = {
1308         .pre_action = snd_pcm_pre_reset,
1309         .do_action = snd_pcm_do_reset,
1310         .post_action = snd_pcm_post_reset
1311 };
1312
1313 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1314 {
1315         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1316 }
1317
1318 /*
1319  * prepare ioctl
1320  */
1321 /* we use the second argument for updating f_flags */
1322 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1323                                int f_flags)
1324 {
1325         struct snd_pcm_runtime *runtime = substream->runtime;
1326         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1327             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1328                 return -EBADFD;
1329         if (snd_pcm_running(substream))
1330                 return -EBUSY;
1331         substream->f_flags = f_flags;
1332         return 0;
1333 }
1334
1335 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1336 {
1337         int err;
1338         err = substream->ops->prepare(substream);
1339         if (err < 0)
1340                 return err;
1341         return snd_pcm_do_reset(substream, 0);
1342 }
1343
1344 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1345 {
1346         struct snd_pcm_runtime *runtime = substream->runtime;
1347         runtime->control->appl_ptr = runtime->status->hw_ptr;
1348         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1349 }
1350
1351 static struct action_ops snd_pcm_action_prepare = {
1352         .pre_action = snd_pcm_pre_prepare,
1353         .do_action = snd_pcm_do_prepare,
1354         .post_action = snd_pcm_post_prepare
1355 };
1356
1357 /**
1358  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1359  * @substream: the PCM substream instance
1360  * @file: file to refer f_flags
1361  */
1362 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1363                            struct file *file)
1364 {
1365         int res;
1366         struct snd_card *card = substream->pcm->card;
1367         int f_flags;
1368
1369         if (file)
1370                 f_flags = file->f_flags;
1371         else
1372                 f_flags = substream->f_flags;
1373
1374         snd_power_lock(card);
1375         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1376                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1377                                                substream, f_flags);
1378         snd_power_unlock(card);
1379         return res;
1380 }
1381
1382 /*
1383  * drain ioctl
1384  */
1385
1386 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1387 {
1388         substream->runtime->trigger_master = substream;
1389         return 0;
1390 }
1391
1392 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1393 {
1394         struct snd_pcm_runtime *runtime = substream->runtime;
1395         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1396                 switch (runtime->status->state) {
1397                 case SNDRV_PCM_STATE_PREPARED:
1398                         /* start playback stream if possible */
1399                         if (! snd_pcm_playback_empty(substream)) {
1400                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1401                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1402                         }
1403                         break;
1404                 case SNDRV_PCM_STATE_RUNNING:
1405                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1406                         break;
1407                 default:
1408                         break;
1409                 }
1410         } else {
1411                 /* stop running stream */
1412                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1413                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1414                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1415                         snd_pcm_do_stop(substream, new_state);
1416                         snd_pcm_post_stop(substream, new_state);
1417                 }
1418         }
1419         return 0;
1420 }
1421
1422 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1423 {
1424 }
1425
1426 static struct action_ops snd_pcm_action_drain_init = {
1427         .pre_action = snd_pcm_pre_drain_init,
1428         .do_action = snd_pcm_do_drain_init,
1429         .post_action = snd_pcm_post_drain_init
1430 };
1431
1432 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1433
1434 /*
1435  * Drain the stream(s).
1436  * When the substream is linked, sync until the draining of all playback streams
1437  * is finished.
1438  * After this call, all streams are supposed to be either SETUP or DRAINING
1439  * (capture only) state.
1440  */
1441 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1442                          struct file *file)
1443 {
1444         struct snd_card *card;
1445         struct snd_pcm_runtime *runtime;
1446         struct snd_pcm_substream *s;
1447         wait_queue_t wait;
1448         int result = 0;
1449         int nonblock = 0;
1450
1451         card = substream->pcm->card;
1452         runtime = substream->runtime;
1453
1454         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1455                 return -EBADFD;
1456
1457         snd_power_lock(card);
1458         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1459                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1460                 if (result < 0) {
1461                         snd_power_unlock(card);
1462                         return result;
1463                 }
1464         }
1465
1466         if (file) {
1467                 if (file->f_flags & O_NONBLOCK)
1468                         nonblock = 1;
1469         } else if (substream->f_flags & O_NONBLOCK)
1470                 nonblock = 1;
1471
1472         down_read(&snd_pcm_link_rwsem);
1473         snd_pcm_stream_lock_irq(substream);
1474         /* resume pause */
1475         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1476                 snd_pcm_pause(substream, 0);
1477
1478         /* pre-start/stop - all running streams are changed to DRAINING state */
1479         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1480         if (result < 0)
1481                 goto unlock;
1482         /* in non-blocking, we don't wait in ioctl but let caller poll */
1483         if (nonblock) {
1484                 result = -EAGAIN;
1485                 goto unlock;
1486         }
1487
1488         for (;;) {
1489                 long tout;
1490                 struct snd_pcm_runtime *to_check;
1491                 if (signal_pending(current)) {
1492                         result = -ERESTARTSYS;
1493                         break;
1494                 }
1495                 /* find a substream to drain */
1496                 to_check = NULL;
1497                 snd_pcm_group_for_each_entry(s, substream) {
1498                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1499                                 continue;
1500                         runtime = s->runtime;
1501                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1502                                 to_check = runtime;
1503                                 break;
1504                         }
1505                 }
1506                 if (!to_check)
1507                         break; /* all drained */
1508                 init_waitqueue_entry(&wait, current);
1509                 add_wait_queue(&to_check->sleep, &wait);
1510                 set_current_state(TASK_INTERRUPTIBLE);
1511                 snd_pcm_stream_unlock_irq(substream);
1512                 up_read(&snd_pcm_link_rwsem);
1513                 snd_power_unlock(card);
1514                 tout = schedule_timeout(10 * HZ);
1515                 snd_power_lock(card);
1516                 down_read(&snd_pcm_link_rwsem);
1517                 snd_pcm_stream_lock_irq(substream);
1518                 remove_wait_queue(&to_check->sleep, &wait);
1519                 if (tout == 0) {
1520                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1521                                 result = -ESTRPIPE;
1522                         else {
1523                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1524                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1525                                 result = -EIO;
1526                         }
1527                         break;
1528                 }
1529         }
1530
1531  unlock:
1532         snd_pcm_stream_unlock_irq(substream);
1533         up_read(&snd_pcm_link_rwsem);
1534         snd_power_unlock(card);
1535
1536         return result;
1537 }
1538
1539 /*
1540  * drop ioctl
1541  *
1542  * Immediately put all linked substreams into SETUP state.
1543  */
1544 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1545 {
1546         struct snd_pcm_runtime *runtime;
1547         struct snd_card *card;
1548         int result = 0;
1549
1550         if (PCM_RUNTIME_CHECK(substream))
1551                 return -ENXIO;
1552         runtime = substream->runtime;
1553         card = substream->pcm->card;
1554
1555         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1556             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1557             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1558                 return -EBADFD;
1559
1560         snd_pcm_stream_lock_irq(substream);
1561         /* resume pause */
1562         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1563                 snd_pcm_pause(substream, 0);
1564
1565         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1566         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1567         snd_pcm_stream_unlock_irq(substream);
1568
1569         return result;
1570 }
1571
1572
1573 /* WARNING: Don't forget to fput back the file */
1574 static struct file *snd_pcm_file_fd(int fd)
1575 {
1576         struct file *file;
1577         struct inode *inode;
1578         unsigned int minor;
1579
1580         file = fget(fd);
1581         if (!file)
1582                 return NULL;
1583         inode = file->f_path.dentry->d_inode;
1584         if (!S_ISCHR(inode->i_mode) ||
1585             imajor(inode) != snd_major) {
1586                 fput(file);
1587                 return NULL;
1588         }
1589         minor = iminor(inode);
1590         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1591             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1592                 fput(file);
1593                 return NULL;
1594         }
1595         return file;
1596 }
1597
1598 /*
1599  * PCM link handling
1600  */
1601 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1602 {
1603         int res = 0;
1604         struct file *file;
1605         struct snd_pcm_file *pcm_file;
1606         struct snd_pcm_substream *substream1;
1607
1608         file = snd_pcm_file_fd(fd);
1609         if (!file)
1610                 return -EBADFD;
1611         pcm_file = file->private_data;
1612         substream1 = pcm_file->substream;
1613         down_write(&snd_pcm_link_rwsem);
1614         write_lock_irq(&snd_pcm_link_rwlock);
1615         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1616             substream->runtime->status->state != substream1->runtime->status->state) {
1617                 res = -EBADFD;
1618                 goto _end;
1619         }
1620         if (snd_pcm_stream_linked(substream1)) {
1621                 res = -EALREADY;
1622                 goto _end;
1623         }
1624         if (!snd_pcm_stream_linked(substream)) {
1625                 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1626                 if (substream->group == NULL) {
1627                         res = -ENOMEM;
1628                         goto _end;
1629                 }
1630                 spin_lock_init(&substream->group->lock);
1631                 INIT_LIST_HEAD(&substream->group->substreams);
1632                 list_add_tail(&substream->link_list, &substream->group->substreams);
1633                 substream->group->count = 1;
1634         }
1635         list_add_tail(&substream1->link_list, &substream->group->substreams);
1636         substream->group->count++;
1637         substream1->group = substream->group;
1638  _end:
1639         write_unlock_irq(&snd_pcm_link_rwlock);
1640         up_write(&snd_pcm_link_rwsem);
1641         fput(file);
1642         return res;
1643 }
1644
1645 static void relink_to_local(struct snd_pcm_substream *substream)
1646 {
1647         substream->group = &substream->self_group;
1648         INIT_LIST_HEAD(&substream->self_group.substreams);
1649         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1650 }
1651
1652 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1653 {
1654         struct snd_pcm_substream *s;
1655         int res = 0;
1656
1657         down_write(&snd_pcm_link_rwsem);
1658         write_lock_irq(&snd_pcm_link_rwlock);
1659         if (!snd_pcm_stream_linked(substream)) {
1660                 res = -EALREADY;
1661                 goto _end;
1662         }
1663         list_del(&substream->link_list);
1664         substream->group->count--;
1665         if (substream->group->count == 1) {     /* detach the last stream, too */
1666                 snd_pcm_group_for_each_entry(s, substream) {
1667                         relink_to_local(s);
1668                         break;
1669                 }
1670                 kfree(substream->group);
1671         }
1672         relink_to_local(substream);
1673        _end:
1674         write_unlock_irq(&snd_pcm_link_rwlock);
1675         up_write(&snd_pcm_link_rwsem);
1676         return res;
1677 }
1678
1679 /*
1680  * hw configurator
1681  */
1682 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1683                                struct snd_pcm_hw_rule *rule)
1684 {
1685         struct snd_interval t;
1686         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1687                      hw_param_interval_c(params, rule->deps[1]), &t);
1688         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1689 }
1690
1691 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1692                                struct snd_pcm_hw_rule *rule)
1693 {
1694         struct snd_interval t;
1695         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1696                      hw_param_interval_c(params, rule->deps[1]), &t);
1697         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1698 }
1699
1700 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1701                                    struct snd_pcm_hw_rule *rule)
1702 {
1703         struct snd_interval t;
1704         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1705                          hw_param_interval_c(params, rule->deps[1]),
1706                          (unsigned long) rule->private, &t);
1707         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1708 }
1709
1710 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1711                                    struct snd_pcm_hw_rule *rule)
1712 {
1713         struct snd_interval t;
1714         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1715                          (unsigned long) rule->private,
1716                          hw_param_interval_c(params, rule->deps[1]), &t);
1717         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1718 }
1719
1720 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1721                                   struct snd_pcm_hw_rule *rule)
1722 {
1723         unsigned int k;
1724         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1725         struct snd_mask m;
1726         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1727         snd_mask_any(&m);
1728         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1729                 int bits;
1730                 if (! snd_mask_test(mask, k))
1731                         continue;
1732                 bits = snd_pcm_format_physical_width(k);
1733                 if (bits <= 0)
1734                         continue; /* ignore invalid formats */
1735                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1736                         snd_mask_reset(&m, k);
1737         }
1738         return snd_mask_refine(mask, &m);
1739 }
1740
1741 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1742                                        struct snd_pcm_hw_rule *rule)
1743 {
1744         struct snd_interval t;
1745         unsigned int k;
1746         t.min = UINT_MAX;
1747         t.max = 0;
1748         t.openmin = 0;
1749         t.openmax = 0;
1750         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1751                 int bits;
1752                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1753                         continue;
1754                 bits = snd_pcm_format_physical_width(k);
1755                 if (bits <= 0)
1756                         continue; /* ignore invalid formats */
1757                 if (t.min > (unsigned)bits)
1758                         t.min = bits;
1759                 if (t.max < (unsigned)bits)
1760                         t.max = bits;
1761         }
1762         t.integer = 1;
1763         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1764 }
1765
1766 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1767 #error "Change this table"
1768 #endif
1769
1770 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1771                                  48000, 64000, 88200, 96000, 176400, 192000 };
1772
1773 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1774         .count = ARRAY_SIZE(rates),
1775         .list = rates,
1776 };
1777
1778 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1779                                 struct snd_pcm_hw_rule *rule)
1780 {
1781         struct snd_pcm_hardware *hw = rule->private;
1782         return snd_interval_list(hw_param_interval(params, rule->var),
1783                                  snd_pcm_known_rates.count,
1784                                  snd_pcm_known_rates.list, hw->rates);
1785 }
1786
1787 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1788                                             struct snd_pcm_hw_rule *rule)
1789 {
1790         struct snd_interval t;
1791         struct snd_pcm_substream *substream = rule->private;
1792         t.min = 0;
1793         t.max = substream->buffer_bytes_max;
1794         t.openmin = 0;
1795         t.openmax = 0;
1796         t.integer = 1;
1797         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1798 }
1799
1800 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1801 {
1802         struct snd_pcm_runtime *runtime = substream->runtime;
1803         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1804         int k, err;
1805
1806         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1807                 snd_mask_any(constrs_mask(constrs, k));
1808         }
1809
1810         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1811                 snd_interval_any(constrs_interval(constrs, k));
1812         }
1813
1814         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1815         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1816         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1817         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1818         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1819
1820         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1821                                    snd_pcm_hw_rule_format, NULL,
1822                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1823         if (err < 0)
1824                 return err;
1825         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1826                                   snd_pcm_hw_rule_sample_bits, NULL,
1827                                   SNDRV_PCM_HW_PARAM_FORMAT,
1828                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1829         if (err < 0)
1830                 return err;
1831         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1832                                   snd_pcm_hw_rule_div, NULL,
1833                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1834         if (err < 0)
1835                 return err;
1836         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1837                                   snd_pcm_hw_rule_mul, NULL,
1838                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1839         if (err < 0)
1840                 return err;
1841         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1842                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1843                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1844         if (err < 0)
1845                 return err;
1846         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1847                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1848                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1849         if (err < 0)
1850                 return err;
1851         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1852                                   snd_pcm_hw_rule_div, NULL,
1853                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1854         if (err < 0)
1855                 return err;
1856         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1857                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1858                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1859         if (err < 0)
1860                 return err;
1861         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1862                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1863                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1864         if (err < 0)
1865                 return err;
1866         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1867                                   snd_pcm_hw_rule_div, NULL,
1868                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1869         if (err < 0)
1870                 return err;
1871         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1872                                   snd_pcm_hw_rule_div, NULL,
1873                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1874         if (err < 0)
1875                 return err;
1876         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1877                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1878                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1879         if (err < 0)
1880                 return err;
1881         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1882                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1883                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1884         if (err < 0)
1885                 return err;
1886         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1887                                   snd_pcm_hw_rule_mul, NULL,
1888                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1889         if (err < 0)
1890                 return err;
1891         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1892                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1893                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1894         if (err < 0)
1895                 return err;
1896         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1897                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1898                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1899         if (err < 0)
1900                 return err;
1901         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1902                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1903                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1904         if (err < 0)
1905                 return err;
1906         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1907                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1908                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1909         if (err < 0)
1910                 return err;
1911         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1912                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1913                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1914         if (err < 0)
1915                 return err;
1916         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1917                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1918                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1919         if (err < 0)
1920                 return err;
1921         return 0;
1922 }
1923
1924 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1925 {
1926         struct snd_pcm_runtime *runtime = substream->runtime;
1927         struct snd_pcm_hardware *hw = &runtime->hw;
1928         int err;
1929         unsigned int mask = 0;
1930
1931         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1932                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1933         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1934                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1935         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1936                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1937                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1938                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1939                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1940                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1941                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1942         }
1943         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1944         if (err < 0)
1945                 return err;
1946
1947         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1948         if (err < 0)
1949                 return err;
1950
1951         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1952         if (err < 0)
1953                 return err;
1954
1955         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1956                                            hw->channels_min, hw->channels_max);
1957         if (err < 0)
1958                 return err;
1959
1960         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1961                                            hw->rate_min, hw->rate_max);
1962         if (err < 0)
1963                 return err;
1964
1965         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1966                                            hw->period_bytes_min, hw->period_bytes_max);
1967         if (err < 0)
1968                 return err;
1969
1970         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1971                                            hw->periods_min, hw->periods_max);
1972         if (err < 0)
1973                 return err;
1974
1975         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1976                                            hw->period_bytes_min, hw->buffer_bytes_max);
1977         if (err < 0)
1978                 return err;
1979
1980         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1981                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1982                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1983         if (err < 0)
1984                 return err;
1985
1986         /* FIXME: remove */
1987         if (runtime->dma_bytes) {
1988                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1989                 if (err < 0)
1990                         return -EINVAL;
1991         }
1992
1993         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1994                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1995                                           snd_pcm_hw_rule_rate, hw,
1996                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1997                 if (err < 0)
1998                         return err;
1999         }
2000
2001         /* FIXME: this belong to lowlevel */
2002         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2003
2004         return 0;
2005 }
2006
2007 static void pcm_release_private(struct snd_pcm_substream *substream)
2008 {
2009         snd_pcm_unlink(substream);
2010 }
2011
2012 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2013 {
2014         substream->ref_count--;
2015         if (substream->ref_count > 0)
2016                 return;
2017
2018         snd_pcm_drop(substream);
2019         if (substream->hw_opened) {
2020                 if (substream->ops->hw_free != NULL)
2021                         substream->ops->hw_free(substream);
2022                 substream->ops->close(substream);
2023                 substream->hw_opened = 0;
2024         }
2025         if (substream->pcm_release) {
2026                 substream->pcm_release(substream);
2027                 substream->pcm_release = NULL;
2028         }
2029         snd_pcm_detach_substream(substream);
2030 }
2031
2032 EXPORT_SYMBOL(snd_pcm_release_substream);
2033
2034 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2035                            struct file *file,
2036                            struct snd_pcm_substream **rsubstream)
2037 {
2038         struct snd_pcm_substream *substream;
2039         int err;
2040
2041         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2042         if (err < 0)
2043                 return err;
2044         if (substream->ref_count > 1) {
2045                 *rsubstream = substream;
2046                 return 0;
2047         }
2048
2049         err = snd_pcm_hw_constraints_init(substream);
2050         if (err < 0) {
2051                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2052                 goto error;
2053         }
2054
2055         if ((err = substream->ops->open(substream)) < 0)
2056                 goto error;
2057
2058         substream->hw_opened = 1;
2059
2060         err = snd_pcm_hw_constraints_complete(substream);
2061         if (err < 0) {
2062                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2063                 goto error;
2064         }
2065
2066         *rsubstream = substream;
2067         return 0;
2068
2069  error:
2070         snd_pcm_release_substream(substream);
2071         return err;
2072 }
2073
2074 EXPORT_SYMBOL(snd_pcm_open_substream);
2075
2076 static int snd_pcm_open_file(struct file *file,
2077                              struct snd_pcm *pcm,
2078                              int stream,
2079                              struct snd_pcm_file **rpcm_file)
2080 {
2081         struct snd_pcm_file *pcm_file;
2082         struct snd_pcm_substream *substream;
2083         struct snd_pcm_str *str;
2084         int err;
2085
2086         if (rpcm_file)
2087                 *rpcm_file = NULL;
2088
2089         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2090         if (err < 0)
2091                 return err;
2092
2093         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2094         if (pcm_file == NULL) {
2095                 snd_pcm_release_substream(substream);
2096                 return -ENOMEM;
2097         }
2098         pcm_file->substream = substream;
2099         if (substream->ref_count == 1) {
2100                 str = substream->pstr;
2101                 substream->file = pcm_file;
2102                 substream->pcm_release = pcm_release_private;
2103         }
2104         file->private_data = pcm_file;
2105         if (rpcm_file)
2106                 *rpcm_file = pcm_file;
2107         return 0;
2108 }
2109
2110 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2111 {
2112         struct snd_pcm *pcm;
2113         int err = nonseekable_open(inode, file);
2114         if (err < 0)
2115                 return err;
2116         pcm = snd_lookup_minor_data(iminor(inode),
2117                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2118         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2119 }
2120
2121 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2122 {
2123         struct snd_pcm *pcm;
2124         int err = nonseekable_open(inode, file);
2125         if (err < 0)
2126                 return err;
2127         pcm = snd_lookup_minor_data(iminor(inode),
2128                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2129         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2130 }
2131
2132 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2133 {
2134         int err;
2135         struct snd_pcm_file *pcm_file;
2136         wait_queue_t wait;
2137
2138         if (pcm == NULL) {
2139                 err = -ENODEV;
2140                 goto __error1;
2141         }
2142         err = snd_card_file_add(pcm->card, file);
2143         if (err < 0)
2144                 goto __error1;
2145         if (!try_module_get(pcm->card->module)) {
2146                 err = -EFAULT;
2147                 goto __error2;
2148         }
2149         init_waitqueue_entry(&wait, current);
2150         add_wait_queue(&pcm->open_wait, &wait);
2151         mutex_lock(&pcm->open_mutex);
2152         while (1) {
2153                 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2154                 if (err >= 0)
2155                         break;
2156                 if (err == -EAGAIN) {
2157                         if (file->f_flags & O_NONBLOCK) {
2158                                 err = -EBUSY;
2159                                 break;
2160                         }
2161                 } else
2162                         break;
2163                 set_current_state(TASK_INTERRUPTIBLE);
2164                 mutex_unlock(&pcm->open_mutex);
2165                 schedule();
2166                 mutex_lock(&pcm->open_mutex);
2167                 if (signal_pending(current)) {
2168                         err = -ERESTARTSYS;
2169                         break;
2170                 }
2171         }
2172         remove_wait_queue(&pcm->open_wait, &wait);
2173         mutex_unlock(&pcm->open_mutex);
2174         if (err < 0)
2175                 goto __error;
2176         return err;
2177
2178       __error:
2179         module_put(pcm->card->module);
2180       __error2:
2181         snd_card_file_remove(pcm->card, file);
2182       __error1:
2183         return err;
2184 }
2185
2186 static int snd_pcm_release(struct inode *inode, struct file *file)
2187 {
2188         struct snd_pcm *pcm;
2189         struct snd_pcm_substream *substream;
2190         struct snd_pcm_file *pcm_file;
2191
2192         pcm_file = file->private_data;
2193         substream = pcm_file->substream;
2194         if (snd_BUG_ON(!substream))
2195                 return -ENXIO;
2196         pcm = substream->pcm;
2197         mutex_lock(&pcm->open_mutex);
2198         snd_pcm_release_substream(substream);
2199         kfree(pcm_file);
2200         mutex_unlock(&pcm->open_mutex);
2201         wake_up(&pcm->open_wait);
2202         module_put(pcm->card->module);
2203         snd_card_file_remove(pcm->card, file);
2204         return 0;
2205 }
2206
2207 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2208                                                  snd_pcm_uframes_t frames)
2209 {
2210         struct snd_pcm_runtime *runtime = substream->runtime;
2211         snd_pcm_sframes_t appl_ptr;
2212         snd_pcm_sframes_t ret;
2213         snd_pcm_sframes_t hw_avail;
2214
2215         if (frames == 0)
2216                 return 0;
2217
2218         snd_pcm_stream_lock_irq(substream);
2219         switch (runtime->status->state) {
2220         case SNDRV_PCM_STATE_PREPARED:
2221                 break;
2222         case SNDRV_PCM_STATE_DRAINING:
2223         case SNDRV_PCM_STATE_RUNNING:
2224                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2225                         break;
2226                 /* Fall through */
2227         case SNDRV_PCM_STATE_XRUN:
2228                 ret = -EPIPE;
2229                 goto __end;
2230         case SNDRV_PCM_STATE_SUSPENDED:
2231                 ret = -ESTRPIPE;
2232                 goto __end;
2233         default:
2234                 ret = -EBADFD;
2235                 goto __end;
2236         }
2237
2238         hw_avail = snd_pcm_playback_hw_avail(runtime);
2239         if (hw_avail <= 0) {
2240                 ret = 0;
2241                 goto __end;
2242         }
2243         if (frames > (snd_pcm_uframes_t)hw_avail)
2244                 frames = hw_avail;
2245         appl_ptr = runtime->control->appl_ptr - frames;
2246         if (appl_ptr < 0)
2247                 appl_ptr += runtime->boundary;
2248         runtime->control->appl_ptr = appl_ptr;
2249         ret = frames;
2250  __end:
2251         snd_pcm_stream_unlock_irq(substream);
2252         return ret;
2253 }
2254
2255 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2256                                                 snd_pcm_uframes_t frames)
2257 {
2258         struct snd_pcm_runtime *runtime = substream->runtime;
2259         snd_pcm_sframes_t appl_ptr;
2260         snd_pcm_sframes_t ret;
2261         snd_pcm_sframes_t hw_avail;
2262
2263         if (frames == 0)
2264                 return 0;
2265
2266         snd_pcm_stream_lock_irq(substream);
2267         switch (runtime->status->state) {
2268         case SNDRV_PCM_STATE_PREPARED:
2269         case SNDRV_PCM_STATE_DRAINING:
2270                 break;
2271         case SNDRV_PCM_STATE_RUNNING:
2272                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2273                         break;
2274                 /* Fall through */
2275         case SNDRV_PCM_STATE_XRUN:
2276                 ret = -EPIPE;
2277                 goto __end;
2278         case SNDRV_PCM_STATE_SUSPENDED:
2279                 ret = -ESTRPIPE;
2280                 goto __end;
2281         default:
2282                 ret = -EBADFD;
2283                 goto __end;
2284         }
2285
2286         hw_avail = snd_pcm_capture_hw_avail(runtime);
2287         if (hw_avail <= 0) {
2288                 ret = 0;
2289                 goto __end;
2290         }
2291         if (frames > (snd_pcm_uframes_t)hw_avail)
2292                 frames = hw_avail;
2293         appl_ptr = runtime->control->appl_ptr - frames;
2294         if (appl_ptr < 0)
2295                 appl_ptr += runtime->boundary;
2296         runtime->control->appl_ptr = appl_ptr;
2297         ret = frames;
2298  __end:
2299         snd_pcm_stream_unlock_irq(substream);
2300         return ret;
2301 }
2302
2303 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2304                                                   snd_pcm_uframes_t frames)
2305 {
2306         struct snd_pcm_runtime *runtime = substream->runtime;
2307         snd_pcm_sframes_t appl_ptr;
2308         snd_pcm_sframes_t ret;
2309         snd_pcm_sframes_t avail;
2310
2311         if (frames == 0)
2312                 return 0;
2313
2314         snd_pcm_stream_lock_irq(substream);
2315         switch (runtime->status->state) {
2316         case SNDRV_PCM_STATE_PREPARED:
2317         case SNDRV_PCM_STATE_PAUSED:
2318                 break;
2319         case SNDRV_PCM_STATE_DRAINING:
2320         case SNDRV_PCM_STATE_RUNNING:
2321                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2322                         break;
2323                 /* Fall through */
2324         case SNDRV_PCM_STATE_XRUN:
2325                 ret = -EPIPE;
2326                 goto __end;
2327         case SNDRV_PCM_STATE_SUSPENDED:
2328                 ret = -ESTRPIPE;
2329                 goto __end;
2330         default:
2331                 ret = -EBADFD;
2332                 goto __end;
2333         }
2334
2335         avail = snd_pcm_playback_avail(runtime);
2336         if (avail <= 0) {
2337                 ret = 0;
2338                 goto __end;
2339         }
2340         if (frames > (snd_pcm_uframes_t)avail)
2341                 frames = avail;
2342         appl_ptr = runtime->control->appl_ptr + frames;
2343         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2344                 appl_ptr -= runtime->boundary;
2345         runtime->control->appl_ptr = appl_ptr;
2346         ret = frames;
2347  __end:
2348         snd_pcm_stream_unlock_irq(substream);
2349         return ret;
2350 }
2351
2352 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2353                                                  snd_pcm_uframes_t frames)
2354 {
2355         struct snd_pcm_runtime *runtime = substream->runtime;
2356         snd_pcm_sframes_t appl_ptr;
2357         snd_pcm_sframes_t ret;
2358         snd_pcm_sframes_t avail;
2359
2360         if (frames == 0)
2361                 return 0;
2362
2363         snd_pcm_stream_lock_irq(substream);
2364         switch (runtime->status->state) {
2365         case SNDRV_PCM_STATE_PREPARED:
2366         case SNDRV_PCM_STATE_DRAINING:
2367         case SNDRV_PCM_STATE_PAUSED:
2368                 break;
2369         case SNDRV_PCM_STATE_RUNNING:
2370                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2371                         break;
2372                 /* Fall through */
2373         case SNDRV_PCM_STATE_XRUN:
2374                 ret = -EPIPE;
2375                 goto __end;
2376         case SNDRV_PCM_STATE_SUSPENDED:
2377                 ret = -ESTRPIPE;
2378                 goto __end;
2379         default:
2380                 ret = -EBADFD;
2381                 goto __end;
2382         }
2383
2384         avail = snd_pcm_capture_avail(runtime);
2385         if (avail <= 0) {
2386                 ret = 0;
2387                 goto __end;
2388         }
2389         if (frames > (snd_pcm_uframes_t)avail)
2390                 frames = avail;
2391         appl_ptr = runtime->control->appl_ptr + frames;
2392         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2393                 appl_ptr -= runtime->boundary;
2394         runtime->control->appl_ptr = appl_ptr;
2395         ret = frames;
2396  __end:
2397         snd_pcm_stream_unlock_irq(substream);
2398         return ret;
2399 }
2400
2401 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2402 {
2403         struct snd_pcm_runtime *runtime = substream->runtime;
2404         int err;
2405
2406         snd_pcm_stream_lock_irq(substream);
2407         switch (runtime->status->state) {
2408         case SNDRV_PCM_STATE_DRAINING:
2409                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2410                         goto __badfd;
2411         case SNDRV_PCM_STATE_RUNNING:
2412                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2413                         break;
2414                 /* Fall through */
2415         case SNDRV_PCM_STATE_PREPARED:
2416         case SNDRV_PCM_STATE_SUSPENDED:
2417                 err = 0;
2418                 break;
2419         case SNDRV_PCM_STATE_XRUN:
2420                 err = -EPIPE;
2421                 break;
2422         default:
2423               __badfd:
2424                 err = -EBADFD;
2425                 break;
2426         }
2427         snd_pcm_stream_unlock_irq(substream);
2428         return err;
2429 }
2430
2431 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2432                          snd_pcm_sframes_t __user *res)
2433 {
2434         struct snd_pcm_runtime *runtime = substream->runtime;
2435         int err;
2436         snd_pcm_sframes_t n = 0;
2437
2438         snd_pcm_stream_lock_irq(substream);
2439         switch (runtime->status->state) {
2440         case SNDRV_PCM_STATE_DRAINING:
2441                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2442                         goto __badfd;
2443         case SNDRV_PCM_STATE_RUNNING:
2444                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2445                         break;
2446                 /* Fall through */
2447         case SNDRV_PCM_STATE_PREPARED:
2448         case SNDRV_PCM_STATE_SUSPENDED:
2449                 err = 0;
2450                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2451                         n = snd_pcm_playback_hw_avail(runtime);
2452                 else
2453                         n = snd_pcm_capture_avail(runtime);
2454                 n += runtime->delay;
2455                 break;
2456         case SNDRV_PCM_STATE_XRUN:
2457                 err = -EPIPE;
2458                 break;
2459         default:
2460               __badfd:
2461                 err = -EBADFD;
2462                 break;
2463         }
2464         snd_pcm_stream_unlock_irq(substream);
2465         if (!err)
2466                 if (put_user(n, res))
2467                         err = -EFAULT;
2468         return err;
2469 }
2470
2471 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2472                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2473 {
2474         struct snd_pcm_runtime *runtime = substream->runtime;
2475         struct snd_pcm_sync_ptr sync_ptr;
2476         volatile struct snd_pcm_mmap_status *status;
2477         volatile struct snd_pcm_mmap_control *control;
2478         int err;
2479
2480         memset(&sync_ptr, 0, sizeof(sync_ptr));
2481         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2482                 return -EFAULT;
2483         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2484                 return -EFAULT;
2485         status = runtime->status;
2486         control = runtime->control;
2487         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2488                 err = snd_pcm_hwsync(substream);
2489                 if (err < 0)
2490                         return err;
2491         }
2492         snd_pcm_stream_lock_irq(substream);
2493         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2494                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2495         else
2496                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2497         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2498                 control->avail_min = sync_ptr.c.control.avail_min;
2499         else
2500                 sync_ptr.c.control.avail_min = control->avail_min;
2501         sync_ptr.s.status.state = status->state;
2502         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2503         sync_ptr.s.status.tstamp = status->tstamp;
2504         sync_ptr.s.status.suspended_state = status->suspended_state;
2505         snd_pcm_stream_unlock_irq(substream);
2506         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2507                 return -EFAULT;
2508         return 0;
2509 }
2510
2511 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2512 {
2513         struct snd_pcm_runtime *runtime = substream->runtime;
2514         int arg;
2515
2516         if (get_user(arg, _arg))
2517                 return -EFAULT;
2518         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2519                 return -EINVAL;
2520         runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2521         if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2522                 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2523         return 0;
2524 }
2525
2526 static int snd_pcm_common_ioctl1(struct file *file,
2527                                  struct snd_pcm_substream *substream,
2528                                  unsigned int cmd, void __user *arg)
2529 {
2530         switch (cmd) {
2531         case SNDRV_PCM_IOCTL_PVERSION:
2532                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2533         case SNDRV_PCM_IOCTL_INFO:
2534                 return snd_pcm_info_user(substream, arg);
2535         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2536                 return 0;
2537         case SNDRV_PCM_IOCTL_TTSTAMP:
2538                 return snd_pcm_tstamp(substream, arg);
2539         case SNDRV_PCM_IOCTL_HW_REFINE:
2540                 return snd_pcm_hw_refine_user(substream, arg);
2541         case SNDRV_PCM_IOCTL_HW_PARAMS:
2542                 return snd_pcm_hw_params_user(substream, arg);
2543         case SNDRV_PCM_IOCTL_HW_FREE:
2544                 return snd_pcm_hw_free(substream);
2545         case SNDRV_PCM_IOCTL_SW_PARAMS:
2546                 return snd_pcm_sw_params_user(substream, arg);
2547         case SNDRV_PCM_IOCTL_STATUS:
2548                 return snd_pcm_status_user(substream, arg);
2549         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2550                 return snd_pcm_channel_info_user(substream, arg);
2551         case SNDRV_PCM_IOCTL_PREPARE:
2552                 return snd_pcm_prepare(substream, file);
2553         case SNDRV_PCM_IOCTL_RESET:
2554                 return snd_pcm_reset(substream);
2555         case SNDRV_PCM_IOCTL_START:
2556                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2557         case SNDRV_PCM_IOCTL_LINK:
2558                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2559         case SNDRV_PCM_IOCTL_UNLINK:
2560                 return snd_pcm_unlink(substream);
2561         case SNDRV_PCM_IOCTL_RESUME:
2562                 return snd_pcm_resume(substream);
2563         case SNDRV_PCM_IOCTL_XRUN:
2564                 return snd_pcm_xrun(substream);
2565         case SNDRV_PCM_IOCTL_HWSYNC:
2566                 return snd_pcm_hwsync(substream);
2567         case SNDRV_PCM_IOCTL_DELAY:
2568                 return snd_pcm_delay(substream, arg);
2569         case SNDRV_PCM_IOCTL_SYNC_PTR:
2570                 return snd_pcm_sync_ptr(substream, arg);
2571 #ifdef CONFIG_SND_SUPPORT_OLD_API
2572         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2573                 return snd_pcm_hw_refine_old_user(substream, arg);
2574         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2575                 return snd_pcm_hw_params_old_user(substream, arg);
2576 #endif
2577         case SNDRV_PCM_IOCTL_DRAIN:
2578                 return snd_pcm_drain(substream, file);
2579         case SNDRV_PCM_IOCTL_DROP:
2580                 return snd_pcm_drop(substream);
2581         case SNDRV_PCM_IOCTL_PAUSE:
2582         {
2583                 int res;
2584                 snd_pcm_stream_lock_irq(substream);
2585                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2586                 snd_pcm_stream_unlock_irq(substream);
2587                 return res;
2588         }
2589         }
2590         snd_printd("unknown ioctl = 0x%x\n", cmd);
2591         return -ENOTTY;
2592 }
2593
2594 static int snd_pcm_playback_ioctl1(struct file *file,
2595                                    struct snd_pcm_substream *substream,
2596                                    unsigned int cmd, void __user *arg)
2597 {
2598         if (snd_BUG_ON(!substream))
2599                 return -ENXIO;
2600         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2601                 return -EINVAL;
2602         switch (cmd) {
2603         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2604         {
2605                 struct snd_xferi xferi;
2606                 struct snd_xferi __user *_xferi = arg;
2607                 struct snd_pcm_runtime *runtime = substream->runtime;
2608                 snd_pcm_sframes_t result;
2609                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2610                         return -EBADFD;
2611                 if (put_user(0, &_xferi->result))
2612                         return -EFAULT;
2613                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2614                         return -EFAULT;
2615                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2616                 __put_user(result, &_xferi->result);
2617                 return result < 0 ? result : 0;
2618         }
2619         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2620         {
2621                 struct snd_xfern xfern;
2622                 struct snd_xfern __user *_xfern = arg;
2623                 struct snd_pcm_runtime *runtime = substream->runtime;
2624                 void __user **bufs;
2625                 snd_pcm_sframes_t result;
2626                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2627                         return -EBADFD;
2628                 if (runtime->channels > 128)
2629                         return -EINVAL;
2630                 if (put_user(0, &_xfern->result))
2631                         return -EFAULT;
2632                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2633                         return -EFAULT;
2634
2635                 bufs = memdup_user(xfern.bufs,
2636                                    sizeof(void *) * runtime->channels);
2637                 if (IS_ERR(bufs))
2638                         return PTR_ERR(bufs);
2639                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2640                 kfree(bufs);
2641                 __put_user(result, &_xfern->result);
2642                 return result < 0 ? result : 0;
2643         }
2644         case SNDRV_PCM_IOCTL_REWIND:
2645         {
2646                 snd_pcm_uframes_t frames;
2647                 snd_pcm_uframes_t __user *_frames = arg;
2648                 snd_pcm_sframes_t result;
2649                 if (get_user(frames, _frames))
2650                         return -EFAULT;
2651                 if (put_user(0, _frames))
2652                         return -EFAULT;
2653                 result = snd_pcm_playback_rewind(substream, frames);
2654                 __put_user(result, _frames);
2655                 return result < 0 ? result : 0;
2656         }
2657         case SNDRV_PCM_IOCTL_FORWARD:
2658         {
2659                 snd_pcm_uframes_t frames;
2660                 snd_pcm_uframes_t __user *_frames = arg;
2661                 snd_pcm_sframes_t result;
2662                 if (get_user(frames, _frames))
2663                         return -EFAULT;
2664                 if (put_user(0, _frames))
2665                         return -EFAULT;
2666                 result = snd_pcm_playback_forward(substream, frames);
2667                 __put_user(result, _frames);
2668                 return result < 0 ? result : 0;
2669         }
2670         }
2671         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2672 }
2673
2674 static int snd_pcm_capture_ioctl1(struct file *file,
2675                                   struct snd_pcm_substream *substream,
2676                                   unsigned int cmd, void __user *arg)
2677 {
2678         if (snd_BUG_ON(!substream))
2679                 return -ENXIO;
2680         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2681                 return -EINVAL;
2682         switch (cmd) {
2683         case SNDRV_PCM_IOCTL_READI_FRAMES:
2684         {
2685                 struct snd_xferi xferi;
2686                 struct snd_xferi __user *_xferi = arg;
2687                 struct snd_pcm_runtime *runtime = substream->runtime;
2688                 snd_pcm_sframes_t result;
2689                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2690                         return -EBADFD;
2691                 if (put_user(0, &_xferi->result))
2692                         return -EFAULT;
2693                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2694                         return -EFAULT;
2695                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2696                 __put_user(result, &_xferi->result);
2697                 return result < 0 ? result : 0;
2698         }
2699         case SNDRV_PCM_IOCTL_READN_FRAMES:
2700         {
2701                 struct snd_xfern xfern;
2702                 struct snd_xfern __user *_xfern = arg;
2703                 struct snd_pcm_runtime *runtime = substream->runtime;
2704                 void *bufs;
2705                 snd_pcm_sframes_t result;
2706                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2707                         return -EBADFD;
2708                 if (runtime->channels > 128)
2709                         return -EINVAL;
2710                 if (put_user(0, &_xfern->result))
2711                         return -EFAULT;
2712                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2713                         return -EFAULT;
2714
2715                 bufs = memdup_user(xfern.bufs,
2716                                    sizeof(void *) * runtime->channels);
2717                 if (IS_ERR(bufs))
2718                         return PTR_ERR(bufs);
2719                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2720                 kfree(bufs);
2721                 __put_user(result, &_xfern->result);
2722                 return result < 0 ? result : 0;
2723         }
2724         case SNDRV_PCM_IOCTL_REWIND:
2725         {
2726                 snd_pcm_uframes_t frames;
2727                 snd_pcm_uframes_t __user *_frames = arg;
2728                 snd_pcm_sframes_t result;
2729                 if (get_user(frames, _frames))
2730                         return -EFAULT;
2731                 if (put_user(0, _frames))
2732                         return -EFAULT;
2733                 result = snd_pcm_capture_rewind(substream, frames);
2734                 __put_user(result, _frames);
2735                 return result < 0 ? result : 0;
2736         }
2737         case SNDRV_PCM_IOCTL_FORWARD:
2738         {
2739                 snd_pcm_uframes_t frames;
2740                 snd_pcm_uframes_t __user *_frames = arg;
2741                 snd_pcm_sframes_t result;
2742                 if (get_user(frames, _frames))
2743                         return -EFAULT;
2744                 if (put_user(0, _frames))
2745                         return -EFAULT;
2746                 result = snd_pcm_capture_forward(substream, frames);
2747                 __put_user(result, _frames);
2748                 return result < 0 ? result : 0;
2749         }
2750         }
2751         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2752 }
2753
2754 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2755                                    unsigned long arg)
2756 {
2757         struct snd_pcm_file *pcm_file;
2758
2759         pcm_file = file->private_data;
2760
2761         if (((cmd >> 8) & 0xff) != 'A')
2762                 return -ENOTTY;
2763
2764         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2765                                        (void __user *)arg);
2766 }
2767
2768 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2769                                   unsigned long arg)
2770 {
2771         struct snd_pcm_file *pcm_file;
2772
2773         pcm_file = file->private_data;
2774
2775         if (((cmd >> 8) & 0xff) != 'A')
2776                 return -ENOTTY;
2777
2778         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2779                                       (void __user *)arg);
2780 }
2781
2782 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2783                          unsigned int cmd, void *arg)
2784 {
2785         mm_segment_t fs;
2786         int result;
2787
2788         fs = snd_enter_user();
2789         switch (substream->stream) {
2790         case SNDRV_PCM_STREAM_PLAYBACK:
2791                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2792                                                  (void __user *)arg);
2793                 break;
2794         case SNDRV_PCM_STREAM_CAPTURE:
2795                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2796                                                 (void __user *)arg);
2797                 break;
2798         default:
2799                 result = -EINVAL;
2800                 break;
2801         }
2802         snd_leave_user(fs);
2803         return result;
2804 }
2805
2806 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2807
2808 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2809                             loff_t * offset)
2810 {
2811         struct snd_pcm_file *pcm_file;
2812         struct snd_pcm_substream *substream;
2813         struct snd_pcm_runtime *runtime;
2814         snd_pcm_sframes_t result;
2815
2816         pcm_file = file->private_data;
2817         substream = pcm_file->substream;
2818         if (PCM_RUNTIME_CHECK(substream))
2819                 return -ENXIO;
2820         runtime = substream->runtime;
2821         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2822                 return -EBADFD;
2823         if (!frame_aligned(runtime, count))
2824                 return -EINVAL;
2825         count = bytes_to_frames(runtime, count);
2826         result = snd_pcm_lib_read(substream, buf, count);
2827         if (result > 0)
2828                 result = frames_to_bytes(runtime, result);
2829         return result;
2830 }
2831
2832 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2833                              size_t count, loff_t * offset)
2834 {
2835         struct snd_pcm_file *pcm_file;
2836         struct snd_pcm_substream *substream;
2837         struct snd_pcm_runtime *runtime;
2838         snd_pcm_sframes_t result;
2839
2840         pcm_file = file->private_data;
2841         substream = pcm_file->substream;
2842         if (PCM_RUNTIME_CHECK(substream))
2843                 return -ENXIO;
2844         runtime = substream->runtime;
2845         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2846                 return -EBADFD;
2847         if (!frame_aligned(runtime, count))
2848                 return -EINVAL;
2849         count = bytes_to_frames(runtime, count);
2850         result = snd_pcm_lib_write(substream, buf, count);
2851         if (result > 0)
2852                 result = frames_to_bytes(runtime, result);
2853         return result;
2854 }
2855
2856 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2857                              unsigned long nr_segs, loff_t pos)
2858
2859 {
2860         struct snd_pcm_file *pcm_file;
2861         struct snd_pcm_substream *substream;
2862         struct snd_pcm_runtime *runtime;
2863         snd_pcm_sframes_t result;
2864         unsigned long i;
2865         void __user **bufs;
2866         snd_pcm_uframes_t frames;
2867
2868         pcm_file = iocb->ki_filp->private_data;
2869         substream = pcm_file->substream;
2870         if (PCM_RUNTIME_CHECK(substream))
2871                 return -ENXIO;
2872         runtime = substream->runtime;
2873         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2874                 return -EBADFD;
2875         if (nr_segs > 1024 || nr_segs != runtime->channels)
2876                 return -EINVAL;
2877         if (!frame_aligned(runtime, iov->iov_len))
2878                 return -EINVAL;
2879         frames = bytes_to_samples(runtime, iov->iov_len);
2880         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2881         if (bufs == NULL)
2882                 return -ENOMEM;
2883         for (i = 0; i < nr_segs; ++i)
2884                 bufs[i] = iov[i].iov_base;
2885         result = snd_pcm_lib_readv(substream, bufs, frames);
2886         if (result > 0)
2887                 result = frames_to_bytes(runtime, result);
2888         kfree(bufs);
2889         return result;
2890 }
2891
2892 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2893                               unsigned long nr_segs, loff_t pos)
2894 {
2895         struct snd_pcm_file *pcm_file;
2896         struct snd_pcm_substream *substream;
2897         struct snd_pcm_runtime *runtime;
2898         snd_pcm_sframes_t result;
2899         unsigned long i;
2900         void __user **bufs;
2901         snd_pcm_uframes_t frames;
2902
2903         pcm_file = iocb->ki_filp->private_data;
2904         substream = pcm_file->substream;
2905         if (PCM_RUNTIME_CHECK(substream))
2906                 return -ENXIO;
2907         runtime = substream->runtime;
2908         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2909                 return -EBADFD;
2910         if (nr_segs > 128 || nr_segs != runtime->channels ||
2911             !frame_aligned(runtime, iov->iov_len))
2912                 return -EINVAL;
2913         frames = bytes_to_samples(runtime, iov->iov_len);
2914         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2915         if (bufs == NULL)
2916                 return -ENOMEM;
2917         for (i = 0; i < nr_segs; ++i)
2918                 bufs[i] = iov[i].iov_base;
2919         result = snd_pcm_lib_writev(substream, bufs, frames);
2920         if (result > 0)
2921                 result = frames_to_bytes(runtime, result);
2922         kfree(bufs);
2923         return result;
2924 }
2925
2926 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2927 {
2928         struct snd_pcm_file *pcm_file;
2929         struct snd_pcm_substream *substream;
2930         struct snd_pcm_runtime *runtime;
2931         unsigned int mask;
2932         snd_pcm_uframes_t avail;
2933
2934         pcm_file = file->private_data;
2935
2936         substream = pcm_file->substream;
2937         if (PCM_RUNTIME_CHECK(substream))
2938                 return -ENXIO;
2939         runtime = substream->runtime;
2940
2941         poll_wait(file, &runtime->sleep, wait);
2942
2943         snd_pcm_stream_lock_irq(substream);
2944         avail = snd_pcm_playback_avail(runtime);
2945         switch (runtime->status->state) {
2946         case SNDRV_PCM_STATE_RUNNING:
2947         case SNDRV_PCM_STATE_PREPARED:
2948         case SNDRV_PCM_STATE_PAUSED:
2949                 if (avail >= runtime->control->avail_min) {
2950                         mask = POLLOUT | POLLWRNORM;
2951                         break;
2952                 }
2953                 /* Fall through */
2954         case SNDRV_PCM_STATE_DRAINING:
2955                 mask = 0;
2956                 break;
2957         default:
2958                 mask = POLLOUT | POLLWRNORM | POLLERR;
2959                 break;
2960         }
2961         snd_pcm_stream_unlock_irq(substream);
2962         return mask;
2963 }
2964
2965 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2966 {
2967         struct snd_pcm_file *pcm_file;
2968         struct snd_pcm_substream *substream;
2969         struct snd_pcm_runtime *runtime;
2970         unsigned int mask;
2971         snd_pcm_uframes_t avail;
2972
2973         pcm_file = file->private_data;
2974
2975         substream = pcm_file->substream;
2976         if (PCM_RUNTIME_CHECK(substream))
2977                 return -ENXIO;
2978         runtime = substream->runtime;
2979
2980         poll_wait(file, &runtime->sleep, wait);
2981
2982         snd_pcm_stream_lock_irq(substream);
2983         avail = snd_pcm_capture_avail(runtime);
2984         switch (runtime->status->state) {
2985         case SNDRV_PCM_STATE_RUNNING:
2986         case SNDRV_PCM_STATE_PREPARED:
2987         case SNDRV_PCM_STATE_PAUSED:
2988                 if (avail >= runtime->control->avail_min) {
2989                         mask = POLLIN | POLLRDNORM;
2990                         break;
2991                 }
2992                 mask = 0;
2993                 break;
2994         case SNDRV_PCM_STATE_DRAINING:
2995                 if (avail > 0) {
2996                         mask = POLLIN | POLLRDNORM;
2997                         break;
2998                 }
2999                 /* Fall through */
3000         default:
3001                 mask = POLLIN | POLLRDNORM | POLLERR;
3002                 break;
3003         }
3004         snd_pcm_stream_unlock_irq(substream);
3005         return mask;
3006 }
3007
3008 /*
3009  * mmap support
3010  */
3011
3012 /*
3013  * Only on coherent architectures, we can mmap the status and the control records
3014  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
3015  */
3016 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3017 /*
3018  * mmap status record
3019  */
3020 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3021                                                 struct vm_fault *vmf)
3022 {
3023         struct snd_pcm_substream *substream = area->vm_private_data;
3024         struct snd_pcm_runtime *runtime;
3025
3026         if (substream == NULL)
3027                 return VM_FAULT_SIGBUS;
3028         runtime = substream->runtime;
3029         vmf->page = virt_to_page(runtime->status);
3030         get_page(vmf->page);
3031         return 0;
3032 }
3033
3034 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3035 {
3036         .fault =        snd_pcm_mmap_status_fault,
3037 };
3038
3039 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3040                                struct vm_area_struct *area)
3041 {
3042         struct snd_pcm_runtime *runtime;
3043         long size;
3044         if (!(area->vm_flags & VM_READ))
3045                 return -EINVAL;
3046         runtime = substream->runtime;
3047         size = area->vm_end - area->vm_start;
3048         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3049                 return -EINVAL;
3050         area->vm_ops = &snd_pcm_vm_ops_status;
3051         area->vm_private_data = substream;
3052         area->vm_flags |= VM_RESERVED;
3053         return 0;
3054 }
3055
3056 /*
3057  * mmap control record
3058  */
3059 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3060                                                 struct vm_fault *vmf)
3061 {
3062         struct snd_pcm_substream *substream = area->vm_private_data;
3063         struct snd_pcm_runtime *runtime;
3064
3065         if (substream == NULL)
3066                 return VM_FAULT_SIGBUS;
3067         runtime = substream->runtime;
3068         vmf->page = virt_to_page(runtime->control);
3069         get_page(vmf->page);
3070         return 0;
3071 }
3072
3073 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3074 {
3075         .fault =        snd_pcm_mmap_control_fault,
3076 };
3077
3078 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3079                                 struct vm_area_struct *area)
3080 {
3081         struct snd_pcm_runtime *runtime;
3082         long size;
3083         if (!(area->vm_flags & VM_READ))
3084                 return -EINVAL;
3085         runtime = substream->runtime;
3086         size = area->vm_end - area->vm_start;
3087         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3088                 return -EINVAL;
3089         area->vm_ops = &snd_pcm_vm_ops_control;
3090         area->vm_private_data = substream;
3091         area->vm_flags |= VM_RESERVED;
3092         return 0;
3093 }
3094 #else /* ! coherent mmap */
3095 /*
3096  * don't support mmap for status and control records.
3097  */
3098 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3099                                struct vm_area_struct *area)
3100 {
3101         return -ENXIO;
3102 }
3103 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3104                                 struct vm_area_struct *area)
3105 {
3106         return -ENXIO;
3107 }
3108 #endif /* coherent mmap */
3109
3110 static inline struct page *
3111 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3112 {
3113         void *vaddr = substream->runtime->dma_area + ofs;
3114 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3115         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3116                 return virt_to_page(CAC_ADDR(vaddr));
3117 #endif
3118 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3119         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3120                 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3121                 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3122                 /* assume dma_handle set via pfn_to_phys() in
3123                  * mm/dma-noncoherent.c
3124                  */
3125                 return pfn_to_page(addr >> PAGE_SHIFT);
3126         }
3127 #endif
3128         return virt_to_page(vaddr);
3129 }
3130
3131 /*
3132  * fault callback for mmapping a RAM page
3133  */
3134 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3135                                                 struct vm_fault *vmf)
3136 {
3137         struct snd_pcm_substream *substream = area->vm_private_data;
3138         struct snd_pcm_runtime *runtime;
3139         unsigned long offset;
3140         struct page * page;
3141         size_t dma_bytes;
3142
3143         if (substream == NULL)
3144                 return VM_FAULT_SIGBUS;
3145         runtime = substream->runtime;
3146         offset = vmf->pgoff << PAGE_SHIFT;
3147         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3148         if (offset > dma_bytes - PAGE_SIZE)
3149                 return VM_FAULT_SIGBUS;
3150         if (substream->ops->page)
3151                 page = substream->ops->page(substream, offset);
3152         else
3153                 page = snd_pcm_default_page_ops(substream, offset);
3154         if (!page)
3155                 return VM_FAULT_SIGBUS;
3156         get_page(page);
3157         vmf->page = page;
3158         return 0;
3159 }
3160
3161 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3162         .open =         snd_pcm_mmap_data_open,
3163         .close =        snd_pcm_mmap_data_close,
3164 };
3165
3166 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3167         .open =         snd_pcm_mmap_data_open,
3168         .close =        snd_pcm_mmap_data_close,
3169         .fault =        snd_pcm_mmap_data_fault,
3170 };
3171
3172 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3173 /* This should be defined / handled globally! */
3174 #ifdef CONFIG_ARM
3175 #define ARCH_HAS_DMA_MMAP_COHERENT
3176 #endif
3177 #endif
3178
3179 /*
3180  * mmap the DMA buffer on RAM
3181  */
3182 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3183                                 struct vm_area_struct *area)
3184 {
3185         area->vm_flags |= VM_RESERVED;
3186 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3187         if (!substream->ops->page &&
3188             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3189                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3190                                          area,
3191                                          substream->runtime->dma_area,
3192                                          substream->runtime->dma_addr,
3193                                          area->vm_end - area->vm_start);
3194 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3195         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3196             !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3197                 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3198 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3199         /* mmap with fault handler */
3200         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3201         return 0;
3202 }
3203
3204 /*
3205  * mmap the DMA buffer on I/O memory area
3206  */
3207 #if SNDRV_PCM_INFO_MMAP_IOMEM
3208 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3209                            struct vm_area_struct *area)
3210 {
3211         long size;
3212         unsigned long offset;
3213
3214         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3215         area->vm_flags |= VM_IO;
3216         size = area->vm_end - area->vm_start;
3217         offset = area->vm_pgoff << PAGE_SHIFT;
3218         if (io_remap_pfn_range(area, area->vm_start,
3219                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3220                                 size, area->vm_page_prot))
3221                 return -EAGAIN;
3222         return 0;
3223 }
3224
3225 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3226 #endif /* SNDRV_PCM_INFO_MMAP */
3227
3228 /* mmap callback with pgprot_noncached */
3229 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream,
3230                                struct vm_area_struct *area)
3231 {
3232         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3233         return snd_pcm_default_mmap(substream, area);
3234 }
3235 EXPORT_SYMBOL(snd_pcm_lib_mmap_noncached);
3236
3237 /*
3238  * mmap DMA buffer
3239  */
3240 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3241                       struct vm_area_struct *area)
3242 {
3243         struct snd_pcm_runtime *runtime;
3244         long size;
3245         unsigned long offset;
3246         size_t dma_bytes;
3247         int err;
3248
3249         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3250                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3251                         return -EINVAL;
3252         } else {
3253                 if (!(area->vm_flags & VM_READ))
3254                         return -EINVAL;
3255         }
3256         runtime = substream->runtime;
3257         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3258                 return -EBADFD;
3259         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3260                 return -ENXIO;
3261         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3262             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3263                 return -EINVAL;
3264         size = area->vm_end - area->vm_start;
3265         offset = area->vm_pgoff << PAGE_SHIFT;
3266         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3267         if ((size_t)size > dma_bytes)
3268                 return -EINVAL;
3269         if (offset > dma_bytes - size)
3270                 return -EINVAL;
3271
3272         area->vm_ops = &snd_pcm_vm_ops_data;
3273         area->vm_private_data = substream;
3274         if (substream->ops->mmap)
3275                 err = substream->ops->mmap(substream, area);
3276         else
3277                 err = snd_pcm_default_mmap(substream, area);
3278         if (!err)
3279                 atomic_inc(&substream->mmap_count);
3280         return err;
3281 }
3282
3283 EXPORT_SYMBOL(snd_pcm_mmap_data);
3284
3285 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3286 {
3287         struct snd_pcm_file * pcm_file;
3288         struct snd_pcm_substream *substream;
3289         unsigned long offset;
3290
3291         pcm_file = file->private_data;
3292         substream = pcm_file->substream;
3293         if (PCM_RUNTIME_CHECK(substream))
3294                 return -ENXIO;
3295
3296         offset = area->vm_pgoff << PAGE_SHIFT;
3297         switch (offset) {
3298         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3299                 if (pcm_file->no_compat_mmap)
3300                         return -ENXIO;
3301                 return snd_pcm_mmap_status(substream, file, area);
3302         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3303                 if (pcm_file->no_compat_mmap)
3304                         return -ENXIO;
3305                 return snd_pcm_mmap_control(substream, file, area);
3306         default:
3307                 return snd_pcm_mmap_data(substream, file, area);
3308         }
3309         return 0;
3310 }
3311
3312 static int snd_pcm_fasync(int fd, struct file * file, int on)
3313 {
3314         struct snd_pcm_file * pcm_file;
3315         struct snd_pcm_substream *substream;
3316         struct snd_pcm_runtime *runtime;
3317
3318         pcm_file = file->private_data;
3319         substream = pcm_file->substream;
3320         if (PCM_RUNTIME_CHECK(substream))
3321                 return -ENXIO;
3322         runtime = substream->runtime;
3323         return fasync_helper(fd, file, on, &runtime->fasync);
3324 }
3325
3326 /*
3327  * ioctl32 compat
3328  */
3329 #ifdef CONFIG_COMPAT
3330 #include "pcm_compat.c"
3331 #else
3332 #define snd_pcm_ioctl_compat    NULL
3333 #endif
3334
3335 /*
3336  *  To be removed helpers to keep binary compatibility
3337  */
3338
3339 #ifdef CONFIG_SND_SUPPORT_OLD_API
3340 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3341 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3342
3343 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3344                                                struct snd_pcm_hw_params_old *oparams)
3345 {
3346         unsigned int i;
3347
3348         memset(params, 0, sizeof(*params));
3349         params->flags = oparams->flags;
3350         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3351                 params->masks[i].bits[0] = oparams->masks[i];
3352         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3353         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3354         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3355         params->info = oparams->info;
3356         params->msbits = oparams->msbits;
3357         params->rate_num = oparams->rate_num;
3358         params->rate_den = oparams->rate_den;
3359         params->fifo_size = oparams->fifo_size;
3360 }
3361
3362 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3363                                              struct snd_pcm_hw_params *params)
3364 {
3365         unsigned int i;
3366
3367         memset(oparams, 0, sizeof(*oparams));
3368         oparams->flags = params->flags;
3369         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3370                 oparams->masks[i] = params->masks[i].bits[0];
3371         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3372         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3373         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3374         oparams->info = params->info;
3375         oparams->msbits = params->msbits;
3376         oparams->rate_num = params->rate_num;
3377         oparams->rate_den = params->rate_den;
3378         oparams->fifo_size = params->fifo_size;
3379 }
3380
3381 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3382                                       struct snd_pcm_hw_params_old __user * _oparams)
3383 {
3384         struct snd_pcm_hw_params *params;
3385         struct snd_pcm_hw_params_old *oparams = NULL;
3386         int err;
3387
3388         params = kmalloc(sizeof(*params), GFP_KERNEL);
3389         if (!params)
3390                 return -ENOMEM;
3391
3392         oparams = memdup_user(_oparams, sizeof(*oparams));
3393         if (IS_ERR(oparams)) {
3394                 err = PTR_ERR(oparams);
3395                 goto out;
3396         }
3397         snd_pcm_hw_convert_from_old_params(params, oparams);
3398         err = snd_pcm_hw_refine(substream, params);
3399         snd_pcm_hw_convert_to_old_params(oparams, params);
3400         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3401                 if (!err)
3402                         err = -EFAULT;
3403         }
3404
3405         kfree(oparams);
3406 out:
3407         kfree(params);
3408         return err;
3409 }
3410
3411 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3412                                       struct snd_pcm_hw_params_old __user * _oparams)
3413 {
3414         struct snd_pcm_hw_params *params;
3415         struct snd_pcm_hw_params_old *oparams = NULL;
3416         int err;
3417
3418         params = kmalloc(sizeof(*params), GFP_KERNEL);
3419         if (!params)
3420                 return -ENOMEM;
3421
3422         oparams = memdup_user(_oparams, sizeof(*oparams));
3423         if (IS_ERR(oparams)) {
3424                 err = PTR_ERR(oparams);
3425                 goto out;
3426         }
3427         snd_pcm_hw_convert_from_old_params(params, oparams);
3428         err = snd_pcm_hw_params(substream, params);
3429         snd_pcm_hw_convert_to_old_params(oparams, params);
3430         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3431                 if (!err)
3432                         err = -EFAULT;
3433         }
3434
3435         kfree(oparams);
3436 out:
3437         kfree(params);
3438         return err;
3439 }
3440 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3441
3442 #ifndef CONFIG_MMU
3443 unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
3444                                       unsigned long len, unsigned long pgoff,
3445                                       unsigned long flags)
3446 {
3447         return 0;
3448 }
3449 #else
3450 # define dummy_get_unmapped_area NULL
3451 #endif
3452
3453 /*
3454  *  Register section
3455  */
3456
3457 const struct file_operations snd_pcm_f_ops[2] = {
3458         {
3459                 .owner =                THIS_MODULE,
3460                 .write =                snd_pcm_write,
3461                 .aio_write =            snd_pcm_aio_write,
3462                 .open =                 snd_pcm_playback_open,
3463                 .release =              snd_pcm_release,
3464                 .llseek =               no_llseek,
3465                 .poll =                 snd_pcm_playback_poll,
3466                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3467                 .compat_ioctl =         snd_pcm_ioctl_compat,
3468                 .mmap =                 snd_pcm_mmap,
3469                 .fasync =               snd_pcm_fasync,
3470                 .get_unmapped_area =    dummy_get_unmapped_area,
3471         },
3472         {
3473                 .owner =                THIS_MODULE,
3474                 .read =                 snd_pcm_read,
3475                 .aio_read =             snd_pcm_aio_read,
3476                 .open =                 snd_pcm_capture_open,
3477                 .release =              snd_pcm_release,
3478                 .llseek =               no_llseek,
3479                 .poll =                 snd_pcm_capture_poll,
3480                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3481                 .compat_ioctl =         snd_pcm_ioctl_compat,
3482                 .mmap =                 snd_pcm_mmap,
3483                 .fasync =               snd_pcm_fasync,
3484                 .get_unmapped_area =    dummy_get_unmapped_area,
3485         }
3486 };