git.oblomov.eu Git - linux-2.6/blob - drivers/media/dvb/dvb-core/dmxdev.c

   1 /*
   2  * dmxdev.c - DVB demultiplexer device
   3  *
   4  * Copyright (C) 2000 Ralph Metzler & Marcus Metzler
   5  *                    for convergence integrated media GmbH
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public License
   9  * as published by the Free Software Foundation; either version 2.1
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  *
  21  */
  22
  23 #include <linux/spinlock.h>
  24 #include <linux/slab.h>
  25 #include <linux/vmalloc.h>
  26 #include <linux/module.h>
  27 #include <linux/poll.h>
  28 #include <linux/ioctl.h>
  29 #include <linux/wait.h>
  30 #include <asm/uaccess.h>
  31 #include <asm/system.h>
  32 #include "dmxdev.h"
  33
  34 static int debug;
  35
  36 module_param(debug, int, 0644);
  37 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
  38
  39 #define dprintk if (debug) printk
  40
  41 static int dvb_dmxdev_buffer_write(struct dvb_ringbuffer *buf,
  42                                    const u8 *src, size_t len)
  43 {
  44         ssize_t free;
  45
  46         if (!len)
  47                 return 0;
  48         if (!buf->data)
  49                 return 0;
  50
  51         free = dvb_ringbuffer_free(buf);
  52         if (len > free) {
  53                 dprintk("dmxdev: buffer overflow\n");
  54                 return -EOVERFLOW;
  55         }
  56
  57         return dvb_ringbuffer_write(buf, src, len);
  58 }
  59
  60 static ssize_t dvb_dmxdev_buffer_read(struct dvb_ringbuffer *src,
  61                                       int non_blocking, char __user *buf,
  62                                       size_t count, loff_t *ppos)
  63 {
  64         size_t todo;
  65         ssize_t avail;
  66         ssize_t ret = 0;
  67
  68         if (!src->data)
  69                 return 0;
  70
  71         if (src->error) {
  72                 ret = src->error;
  73                 dvb_ringbuffer_flush(src);
  74                 return ret;
  75         }
  76
  77         for (todo = count; todo > 0; todo -= ret) {
  78                 if (non_blocking && dvb_ringbuffer_empty(src)) {
  79                         ret = -EWOULDBLOCK;
  80                         break;
  81                 }
  82
  83                 ret = wait_event_interruptible(src->queue,
  84                                                !dvb_ringbuffer_empty(src) ||
  85                                                (src->error != 0));
  86                 if (ret < 0)
  87                         break;
  88
  89                 if (src->error) {
  90                         ret = src->error;
  91                         dvb_ringbuffer_flush(src);
  92                         break;
  93                 }
  94
  95                 avail = dvb_ringbuffer_avail(src);
  96                 if (avail > todo)
  97                         avail = todo;
  98
  99                 ret = dvb_ringbuffer_read_user(src, buf, avail);
 100                 if (ret < 0)
 101                         break;
 102
 103                 buf += ret;
 104         }
 105
 106         return (count - todo) ? (count - todo) : ret;
 107 }
 108
 109 static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type)
 110 {
 111         struct list_head *head, *pos;
 112
 113         head = demux->get_frontends(demux);
 114         if (!head)
 115                 return NULL;
 116         list_for_each(pos, head)
 117                 if (DMX_FE_ENTRY(pos)->source == type)
 118                         return DMX_FE_ENTRY(pos);
 119
 120         return NULL;
 121 }
 122
 123 static int dvb_dvr_open(struct inode *inode, struct file *file)
 124 {
 125         struct dvb_device *dvbdev = file->private_data;
 126         struct dmxdev *dmxdev = dvbdev->priv;
 127         struct dmx_frontend *front;
 128
 129         dprintk("function : %s\n", __func__);
 130
 131         if (mutex_lock_interruptible(&dmxdev->mutex))
 132                 return -ERESTARTSYS;
 133
 134         if (dmxdev->exit) {
 135                 mutex_unlock(&dmxdev->mutex);
 136                 return -ENODEV;
 137         }
 138
 139         if ((file->f_flags & O_ACCMODE) == O_RDWR) {
 140                 if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) {
 141                         mutex_unlock(&dmxdev->mutex);
 142                         return -EOPNOTSUPP;
 143                 }
 144         }
 145
 146         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
 147                 void *mem;
 148                 if (!dvbdev->readers) {
 149                         mutex_unlock(&dmxdev->mutex);
 150                         return -EBUSY;
 151                 }
 152                 mem = vmalloc(DVR_BUFFER_SIZE);
 153                 if (!mem) {
 154                         mutex_unlock(&dmxdev->mutex);
 155                         return -ENOMEM;
 156                 }
 157                 dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE);
 158                 dvbdev->readers--;
 159         }
 160
 161         if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
 162                 dmxdev->dvr_orig_fe = dmxdev->demux->frontend;
 163
 164                 if (!dmxdev->demux->write) {
 165                         mutex_unlock(&dmxdev->mutex);
 166                         return -EOPNOTSUPP;
 167                 }
 168
 169                 front = get_fe(dmxdev->demux, DMX_MEMORY_FE);
 170
 171                 if (!front) {
 172                         mutex_unlock(&dmxdev->mutex);
 173                         return -EINVAL;
 174                 }
 175                 dmxdev->demux->disconnect_frontend(dmxdev->demux);
 176                 dmxdev->demux->connect_frontend(dmxdev->demux, front);
 177         }
 178         dvbdev->users++;
 179         mutex_unlock(&dmxdev->mutex);
 180         return 0;
 181 }
 182
 183 static int dvb_dvr_release(struct inode *inode, struct file *file)
 184 {
 185         struct dvb_device *dvbdev = file->private_data;
 186         struct dmxdev *dmxdev = dvbdev->priv;
 187
 188         mutex_lock(&dmxdev->mutex);
 189
 190         if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
 191                 dmxdev->demux->disconnect_frontend(dmxdev->demux);
 192                 dmxdev->demux->connect_frontend(dmxdev->demux,
 193                                                 dmxdev->dvr_orig_fe);
 194         }
 195         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
 196                 dvbdev->readers++;
 197                 if (dmxdev->dvr_buffer.data) {
 198                         void *mem = dmxdev->dvr_buffer.data;
 199                         mb();
 200                         spin_lock_irq(&dmxdev->lock);
 201                         dmxdev->dvr_buffer.data = NULL;
 202                         spin_unlock_irq(&dmxdev->lock);
 203                         vfree(mem);
 204                 }
 205         }
 206         /* TODO */
 207         dvbdev->users--;
 208         if(dvbdev->users==-1 && dmxdev->exit==1) {
 209                 fops_put(file->f_op);
 210                 file->f_op = NULL;
 211                 mutex_unlock(&dmxdev->mutex);
 212                 wake_up(&dvbdev->wait_queue);
 213         } else
 214                 mutex_unlock(&dmxdev->mutex);
 215
 216         return 0;
 217 }
 218
 219 static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
 220                              size_t count, loff_t *ppos)
 221 {
 222         struct dvb_device *dvbdev = file->private_data;
 223         struct dmxdev *dmxdev = dvbdev->priv;
 224         int ret;
 225
 226         if (!dmxdev->demux->write)
 227                 return -EOPNOTSUPP;
 228         if ((file->f_flags & O_ACCMODE) != O_WRONLY)
 229                 return -EINVAL;
 230         if (mutex_lock_interruptible(&dmxdev->mutex))
 231                 return -ERESTARTSYS;
 232
 233         if (dmxdev->exit) {
 234                 mutex_unlock(&dmxdev->mutex);
 235                 return -ENODEV;
 236         }
 237         ret = dmxdev->demux->write(dmxdev->demux, buf, count);
 238         mutex_unlock(&dmxdev->mutex);
 239         return ret;
 240 }
 241
 242 static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
 243                             loff_t *ppos)
 244 {
 245         struct dvb_device *dvbdev = file->private_data;
 246         struct dmxdev *dmxdev = dvbdev->priv;
 247         int ret;
 248
 249         if (dmxdev->exit) {
 250                 mutex_unlock(&dmxdev->mutex);
 251                 return -ENODEV;
 252         }
 253
 254         //mutex_lock(&dmxdev->mutex);
 255         ret = dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
 256                                      file->f_flags & O_NONBLOCK,
 257                                      buf, count, ppos);
 258         //mutex_unlock(&dmxdev->mutex);
 259         return ret;
 260 }
 261
 262 static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev,
 263                                       unsigned long size)
 264 {
 265         struct dvb_ringbuffer *buf = &dmxdev->dvr_buffer;
 266         void *newmem;
 267         void *oldmem;
 268
 269         dprintk("function : %s\n", __func__);
 270
 271         if (buf->size == size)
 272                 return 0;
 273         if (!size)
 274                 return -EINVAL;
 275
 276         newmem = vmalloc(size);
 277         if (!newmem)
 278                 return -ENOMEM;
 279
 280         oldmem = buf->data;
 281
 282         spin_lock_irq(&dmxdev->lock);
 283         buf->data = newmem;
 284         buf->size = size;
 285
 286         /* reset and not flush in case the buffer shrinks */
 287         dvb_ringbuffer_reset(buf);
 288         spin_unlock_irq(&dmxdev->lock);
 289
 290         vfree(oldmem);
 291
 292         return 0;
 293 }
 294
 295 static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
 296                                                *dmxdevfilter, int state)
 297 {
 298         spin_lock_irq(&dmxdevfilter->dev->lock);
 299         dmxdevfilter->state = state;
 300         spin_unlock_irq(&dmxdevfilter->dev->lock);
 301 }
 302
 303 static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
 304                                       unsigned long size)
 305 {
 306         struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
 307         void *newmem;
 308         void *oldmem;
 309
 310         if (buf->size == size)
 311                 return 0;
 312         if (!size)
 313                 return -EINVAL;
 314         if (dmxdevfilter->state >= DMXDEV_STATE_GO)
 315                 return -EBUSY;
 316
 317         newmem = vmalloc(size);
 318         if (!newmem)
 319                 return -ENOMEM;
 320
 321         oldmem = buf->data;
 322
 323         spin_lock_irq(&dmxdevfilter->dev->lock);
 324         buf->data = newmem;
 325         buf->size = size;
 326
 327         /* reset and not flush in case the buffer shrinks */
 328         dvb_ringbuffer_reset(buf);
 329         spin_unlock_irq(&dmxdevfilter->dev->lock);
 330
 331         vfree(oldmem);
 332
 333         return 0;
 334 }
 335
 336 static void dvb_dmxdev_filter_timeout(unsigned long data)
 337 {
 338         struct dmxdev_filter *dmxdevfilter = (struct dmxdev_filter *)data;
 339
 340         dmxdevfilter->buffer.error = -ETIMEDOUT;
 341         spin_lock_irq(&dmxdevfilter->dev->lock);
 342         dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
 343         spin_unlock_irq(&dmxdevfilter->dev->lock);
 344         wake_up(&dmxdevfilter->buffer.queue);
 345 }
 346
 347 static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
 348 {
 349         struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
 350
 351         del_timer(&dmxdevfilter->timer);
 352         if (para->timeout) {
 353                 dmxdevfilter->timer.function = dvb_dmxdev_filter_timeout;
 354                 dmxdevfilter->timer.data = (unsigned long)dmxdevfilter;
 355                 dmxdevfilter->timer.expires =
 356                     jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
 357                 add_timer(&dmxdevfilter->timer);
 358         }
 359 }
 360
 361 static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
 362                                        const u8 *buffer2, size_t buffer2_len,
 363                                        struct dmx_section_filter *filter,
 364                                        enum dmx_success success)
 365 {
 366         struct dmxdev_filter *dmxdevfilter = filter->priv;
 367         unsigned long flags;
 368         int ret;
 369
 370         if (dmxdevfilter->buffer.error) {
 371                 wake_up(&dmxdevfilter->buffer.queue);
 372                 return 0;
 373         }
 374         spin_lock_irqsave(&dmxdevfilter->dev->lock, flags);
 375         if (dmxdevfilter->state != DMXDEV_STATE_GO) {
 376                 spin_unlock_irqrestore(&dmxdevfilter->dev->lock, flags);
 377                 return 0;
 378         }
 379         del_timer(&dmxdevfilter->timer);
 380         dprintk("dmxdev: section callback %02x %02x %02x %02x %02x %02x\n",
 381                 buffer1[0], buffer1[1],
 382                 buffer1[2], buffer1[3], buffer1[4], buffer1[5]);
 383         ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1,
 384                                       buffer1_len);
 385         if (ret == buffer1_len) {
 386                 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2,
 387                                               buffer2_len);
 388         }
 389         if (ret < 0) {
 390                 dvb_ringbuffer_flush(&dmxdevfilter->buffer);
 391                 dmxdevfilter->buffer.error = ret;
 392         }
 393         if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
 394                 dmxdevfilter->state = DMXDEV_STATE_DONE;
 395         spin_unlock_irqrestore(&dmxdevfilter->dev->lock, flags);
 396         wake_up(&dmxdevfilter->buffer.queue);
 397         return 0;
 398 }
 399
 400 static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
 401                                   const u8 *buffer2, size_t buffer2_len,
 402                                   struct dmx_ts_feed *feed,
 403                                   enum dmx_success success)
 404 {
 405         struct dmxdev_filter *dmxdevfilter = feed->priv;
 406         struct dvb_ringbuffer *buffer;
 407         unsigned long flags;
 408         int ret;
 409
 410         spin_lock_irqsave(&dmxdevfilter->dev->lock, flags);
 411         if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
 412                 spin_unlock_irqrestore(&dmxdevfilter->dev->lock, flags);
 413                 return 0;
 414         }
 415
 416         if (dmxdevfilter->params.pes.output == DMX_OUT_TAP
 417             || dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP)
 418                 buffer = &dmxdevfilter->buffer;
 419         else
 420                 buffer = &dmxdevfilter->dev->dvr_buffer;
 421         if (buffer->error) {
 422                 spin_unlock_irqrestore(&dmxdevfilter->dev->lock, flags);
 423                 wake_up(&buffer->queue);
 424                 return 0;
 425         }
 426         ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
 427         if (ret == buffer1_len)
 428                 ret = dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len);
 429         if (ret < 0) {
 430                 dvb_ringbuffer_flush(buffer);
 431                 buffer->error = ret;
 432         }
 433         spin_unlock_irqrestore(&dmxdevfilter->dev->lock, flags);
 434         wake_up(&buffer->queue);
 435         return 0;
 436 }
 437
 438 /* stop feed but only mark the specified filter as stopped (state set) */
 439 static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
 440 {
 441         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 442
 443         switch (dmxdevfilter->type) {
 444         case DMXDEV_TYPE_SEC:
 445                 del_timer(&dmxdevfilter->timer);
 446                 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
 447                 break;
 448         case DMXDEV_TYPE_PES:
 449                 dmxdevfilter->feed.ts->stop_filtering(dmxdevfilter->feed.ts);
 450                 break;
 451         default:
 452                 return -EINVAL;
 453         }
 454         return 0;
 455 }
 456
 457 /* start feed associated with the specified filter */
 458 static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
 459 {
 460         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 461
 462         switch (filter->type) {
 463         case DMXDEV_TYPE_SEC:
 464                 return filter->feed.sec->start_filtering(filter->feed.sec);
 465         case DMXDEV_TYPE_PES:
 466                 return filter->feed.ts->start_filtering(filter->feed.ts);
 467         default:
 468                 return -EINVAL;
 469         }
 470
 471         return 0;
 472 }
 473
 474 /* restart section feed if it has filters left associated with it,
 475    otherwise release the feed */
 476 static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
 477 {
 478         int i;
 479         struct dmxdev *dmxdev = filter->dev;
 480         u16 pid = filter->params.sec.pid;
 481
 482         for (i = 0; i < dmxdev->filternum; i++)
 483                 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 484                     dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 485                     dmxdev->filter[i].params.sec.pid == pid) {
 486                         dvb_dmxdev_feed_start(&dmxdev->filter[i]);
 487                         return 0;
 488                 }
 489
 490         filter->dev->demux->release_section_feed(dmxdev->demux,
 491                                                  filter->feed.sec);
 492
 493         return 0;
 494 }
 495
 496 static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
 497 {
 498         if (dmxdevfilter->state < DMXDEV_STATE_GO)
 499                 return 0;
 500
 501         switch (dmxdevfilter->type) {
 502         case DMXDEV_TYPE_SEC:
 503                 if (!dmxdevfilter->feed.sec)
 504                         break;
 505                 dvb_dmxdev_feed_stop(dmxdevfilter);
 506                 if (dmxdevfilter->filter.sec)
 507                         dmxdevfilter->feed.sec->
 508                             release_filter(dmxdevfilter->feed.sec,
 509                                            dmxdevfilter->filter.sec);
 510                 dvb_dmxdev_feed_restart(dmxdevfilter);
 511                 dmxdevfilter->feed.sec = NULL;
 512                 break;
 513         case DMXDEV_TYPE_PES:
 514                 if (!dmxdevfilter->feed.ts)
 515                         break;
 516                 dvb_dmxdev_feed_stop(dmxdevfilter);
 517                 dmxdevfilter->dev->demux->
 518                     release_ts_feed(dmxdevfilter->dev->demux,
 519                                     dmxdevfilter->feed.ts);
 520                 dmxdevfilter->feed.ts = NULL;
 521                 break;
 522         default:
 523                 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)
 524                         return 0;
 525                 return -EINVAL;
 526         }
 527
 528         dvb_ringbuffer_flush(&dmxdevfilter->buffer);
 529         return 0;
 530 }
 531
 532 static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
 533 {
 534         if (dmxdevfilter->state < DMXDEV_STATE_SET)
 535                 return 0;
 536
 537         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 538         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 539         return 0;
 540 }
 541
 542 static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
 543 {
 544         struct dmxdev *dmxdev = filter->dev;
 545         void *mem;
 546         int ret, i;
 547
 548         if (filter->state < DMXDEV_STATE_SET)
 549                 return -EINVAL;
 550
 551         if (filter->state >= DMXDEV_STATE_GO)
 552                 dvb_dmxdev_filter_stop(filter);
 553
 554         if (!filter->buffer.data) {
 555                 mem = vmalloc(filter->buffer.size);
 556                 if (!mem)
 557                         return -ENOMEM;
 558                 spin_lock_irq(&filter->dev->lock);
 559                 filter->buffer.data = mem;
 560                 spin_unlock_irq(&filter->dev->lock);
 561         }
 562
 563         dvb_ringbuffer_flush(&filter->buffer);
 564
 565         switch (filter->type) {
 566         case DMXDEV_TYPE_SEC:
 567         {
 568                 struct dmx_sct_filter_params *para = &filter->params.sec;
 569                 struct dmx_section_filter **secfilter = &filter->filter.sec;
 570                 struct dmx_section_feed **secfeed = &filter->feed.sec;
 571
 572                 *secfilter = NULL;
 573                 *secfeed = NULL;
 574
 575
 576                 /* find active filter/feed with same PID */
 577                 for (i = 0; i < dmxdev->filternum; i++) {
 578                         if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 579                             dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 580                             dmxdev->filter[i].params.sec.pid == para->pid) {
 581                                 *secfeed = dmxdev->filter[i].feed.sec;
 582                                 break;
 583                         }
 584                 }
 585
 586                 /* if no feed found, try to allocate new one */
 587                 if (!*secfeed) {
 588                         ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,
 589                                                                    secfeed,
 590                                                                    dvb_dmxdev_section_callback);
 591                         if (ret < 0) {
 592                                 printk("DVB (%s): could not alloc feed\n",
 593                                        __func__);
 594                                 return ret;
 595                         }
 596
 597                         ret = (*secfeed)->set(*secfeed, para->pid, 32768,
 598                                               (para->flags & DMX_CHECK_CRC) ? 1 : 0);
 599                         if (ret < 0) {
 600                                 printk("DVB (%s): could not set feed\n",
 601                                        __func__);
 602                                 dvb_dmxdev_feed_restart(filter);
 603                                 return ret;
 604                         }
 605                 } else {
 606                         dvb_dmxdev_feed_stop(filter);
 607                 }
 608
 609                 ret = (*secfeed)->allocate_filter(*secfeed, secfilter);
 610                 if (ret < 0) {
 611                         dvb_dmxdev_feed_restart(filter);
 612                         filter->feed.sec->start_filtering(*secfeed);
 613                         dprintk("could not get filter\n");
 614                         return ret;
 615                 }
 616
 617                 (*secfilter)->priv = filter;
 618
 619                 memcpy(&((*secfilter)->filter_value[3]),
 620                        &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);
 621                 memcpy(&(*secfilter)->filter_mask[3],
 622                        &para->filter.mask[1], DMX_FILTER_SIZE - 1);
 623                 memcpy(&(*secfilter)->filter_mode[3],
 624                        &para->filter.mode[1], DMX_FILTER_SIZE - 1);
 625
 626                 (*secfilter)->filter_value[0] = para->filter.filter[0];
 627                 (*secfilter)->filter_mask[0] = para->filter.mask[0];
 628                 (*secfilter)->filter_mode[0] = para->filter.mode[0];
 629                 (*secfilter)->filter_mask[1] = 0;
 630                 (*secfilter)->filter_mask[2] = 0;
 631
 632                 filter->todo = 0;
 633
 634                 ret = filter->feed.sec->start_filtering(filter->feed.sec);
 635                 if (ret < 0)
 636                         return ret;
 637
 638                 dvb_dmxdev_filter_timer(filter);
 639                 break;
 640         }
 641         case DMXDEV_TYPE_PES:
 642         {
 643                 struct timespec timeout = { 0 };
 644                 struct dmx_pes_filter_params *para = &filter->params.pes;
 645                 dmx_output_t otype;
 646                 int ts_type;
 647                 enum dmx_ts_pes ts_pes;
 648                 struct dmx_ts_feed **tsfeed = &filter->feed.ts;
 649
 650                 filter->feed.ts = NULL;
 651                 otype = para->output;
 652
 653                 ts_pes = (enum dmx_ts_pes)para->pes_type;
 654
 655                 if (ts_pes < DMX_PES_OTHER)
 656                         ts_type = TS_DECODER;
 657                 else
 658                         ts_type = 0;
 659
 660                 if (otype == DMX_OUT_TS_TAP)
 661                         ts_type |= TS_PACKET;
 662                 else if (otype == DMX_OUT_TSDEMUX_TAP)
 663                         ts_type |= TS_PACKET | TS_DEMUX;
 664                 else if (otype == DMX_OUT_TAP)
 665                         ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY;
 666
 667                 ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux,
 668                                                       tsfeed,
 669                                                       dvb_dmxdev_ts_callback);
 670                 if (ret < 0)
 671                         return ret;
 672
 673                 (*tsfeed)->priv = filter;
 674
 675                 ret = (*tsfeed)->set(*tsfeed, para->pid, ts_type, ts_pes,
 676                                      32768, timeout);
 677                 if (ret < 0) {
 678                         dmxdev->demux->release_ts_feed(dmxdev->demux,
 679                                                        *tsfeed);
 680                         return ret;
 681                 }
 682
 683                 ret = filter->feed.ts->start_filtering(filter->feed.ts);
 684                 if (ret < 0) {
 685                         dmxdev->demux->release_ts_feed(dmxdev->demux,
 686                                                        *tsfeed);
 687                         return ret;
 688                 }
 689
 690                 break;
 691         }
 692         default:
 693                 return -EINVAL;
 694         }
 695
 696         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 697         return 0;
 698 }
 699
 700 static int dvb_demux_open(struct inode *inode, struct file *file)
 701 {
 702         struct dvb_device *dvbdev = file->private_data;
 703         struct dmxdev *dmxdev = dvbdev->priv;
 704         int i;
 705         struct dmxdev_filter *dmxdevfilter;
 706
 707         if (!dmxdev->filter)
 708                 return -EINVAL;
 709
 710         if (mutex_lock_interruptible(&dmxdev->mutex))
 711                 return -ERESTARTSYS;
 712
 713         for (i = 0; i < dmxdev->filternum; i++)
 714                 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
 715                         break;
 716
 717         if (i == dmxdev->filternum) {
 718                 mutex_unlock(&dmxdev->mutex);
 719                 return -EMFILE;
 720         }
 721
 722         dmxdevfilter = &dmxdev->filter[i];
 723         mutex_init(&dmxdevfilter->mutex);
 724         file->private_data = dmxdevfilter;
 725
 726         dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);
 727         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 728         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 729         dmxdevfilter->feed.ts = NULL;
 730         init_timer(&dmxdevfilter->timer);
 731
 732         dvbdev->users++;
 733
 734         mutex_unlock(&dmxdev->mutex);
 735         return 0;
 736 }
 737
 738 static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
 739                                   struct dmxdev_filter *dmxdevfilter)
 740 {
 741         mutex_lock(&dmxdev->mutex);
 742         mutex_lock(&dmxdevfilter->mutex);
 743
 744         dvb_dmxdev_filter_stop(dmxdevfilter);
 745         dvb_dmxdev_filter_reset(dmxdevfilter);
 746
 747         if (dmxdevfilter->buffer.data) {
 748                 void *mem = dmxdevfilter->buffer.data;
 749
 750                 spin_lock_irq(&dmxdev->lock);
 751                 dmxdevfilter->buffer.data = NULL;
 752                 spin_unlock_irq(&dmxdev->lock);
 753                 vfree(mem);
 754         }
 755
 756         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
 757         wake_up(&dmxdevfilter->buffer.queue);
 758         mutex_unlock(&dmxdevfilter->mutex);
 759         mutex_unlock(&dmxdev->mutex);
 760         return 0;
 761 }
 762
 763 static inline void invert_mode(dmx_filter_t *filter)
 764 {
 765         int i;
 766
 767         for (i = 0; i < DMX_FILTER_SIZE; i++)
 768                 filter->mode[i] ^= 0xff;
 769 }
 770
 771 static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
 772                                  struct dmxdev_filter *dmxdevfilter,
 773                                  struct dmx_sct_filter_params *params)
 774 {
 775         dprintk("function : %s\n", __func__);
 776
 777         dvb_dmxdev_filter_stop(dmxdevfilter);
 778
 779         dmxdevfilter->type = DMXDEV_TYPE_SEC;
 780         memcpy(&dmxdevfilter->params.sec,
 781                params, sizeof(struct dmx_sct_filter_params));
 782         invert_mode(&dmxdevfilter->params.sec.filter);
 783         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 784
 785         if (params->flags & DMX_IMMEDIATE_START)
 786                 return dvb_dmxdev_filter_start(dmxdevfilter);
 787
 788         return 0;
 789 }
 790
 791 static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
 792                                      struct dmxdev_filter *dmxdevfilter,
 793                                      struct dmx_pes_filter_params *params)
 794 {
 795         dvb_dmxdev_filter_stop(dmxdevfilter);
 796
 797         if (params->pes_type > DMX_PES_OTHER || params->pes_type < 0)
 798                 return -EINVAL;
 799
 800         dmxdevfilter->type = DMXDEV_TYPE_PES;
 801         memcpy(&dmxdevfilter->params, params,
 802                sizeof(struct dmx_pes_filter_params));
 803
 804         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 805
 806         if (params->flags & DMX_IMMEDIATE_START)
 807                 return dvb_dmxdev_filter_start(dmxdevfilter);
 808
 809         return 0;
 810 }
 811
 812 static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
 813                                    struct file *file, char __user *buf,
 814                                    size_t count, loff_t *ppos)
 815 {
 816         int result, hcount;
 817         int done = 0;
 818
 819         if (dfil->todo <= 0) {
 820                 hcount = 3 + dfil->todo;
 821                 if (hcount > count)
 822                         hcount = count;
 823                 result = dvb_dmxdev_buffer_read(&dfil->buffer,
 824                                                 file->f_flags & O_NONBLOCK,
 825                                                 buf, hcount, ppos);
 826                 if (result < 0) {
 827                         dfil->todo = 0;
 828                         return result;
 829                 }
 830                 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
 831                         return -EFAULT;
 832                 buf += result;
 833                 done = result;
 834                 count -= result;
 835                 dfil->todo -= result;
 836                 if (dfil->todo > -3)
 837                         return done;
 838                 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
 839                 if (!count)
 840                         return done;
 841         }
 842         if (count > dfil->todo)
 843                 count = dfil->todo;
 844         result = dvb_dmxdev_buffer_read(&dfil->buffer,
 845                                         file->f_flags & O_NONBLOCK,
 846                                         buf, count, ppos);
 847         if (result < 0)
 848                 return result;
 849         dfil->todo -= result;
 850         return (result + done);
 851 }
 852
 853 static ssize_t
 854 dvb_demux_read(struct file *file, char __user *buf, size_t count,
 855                loff_t *ppos)
 856 {
 857         struct dmxdev_filter *dmxdevfilter = file->private_data;
 858         int ret;
 859
 860         if (mutex_lock_interruptible(&dmxdevfilter->mutex))
 861                 return -ERESTARTSYS;
 862
 863         if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
 864                 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
 865         else
 866                 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
 867                                              file->f_flags & O_NONBLOCK,
 868                                              buf, count, ppos);
 869
 870         mutex_unlock(&dmxdevfilter->mutex);
 871         return ret;
 872 }
 873
 874 static int dvb_demux_do_ioctl(struct inode *inode, struct file *file,
 875                               unsigned int cmd, void *parg)
 876 {
 877         struct dmxdev_filter *dmxdevfilter = file->private_data;
 878         struct dmxdev *dmxdev = dmxdevfilter->dev;
 879         unsigned long arg = (unsigned long)parg;
 880         int ret = 0;
 881
 882         if (mutex_lock_interruptible(&dmxdev->mutex))
 883                 return -ERESTARTSYS;
 884
 885         switch (cmd) {
 886         case DMX_START:
 887                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 888                         mutex_unlock(&dmxdev->mutex);
 889                         return -ERESTARTSYS;
 890                 }
 891                 if (dmxdevfilter->state < DMXDEV_STATE_SET)
 892                         ret = -EINVAL;
 893                 else
 894                         ret = dvb_dmxdev_filter_start(dmxdevfilter);
 895                 mutex_unlock(&dmxdevfilter->mutex);
 896                 break;
 897
 898         case DMX_STOP:
 899                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 900                         mutex_unlock(&dmxdev->mutex);
 901                         return -ERESTARTSYS;
 902                 }
 903                 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
 904                 mutex_unlock(&dmxdevfilter->mutex);
 905                 break;
 906
 907         case DMX_SET_FILTER:
 908                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 909                         mutex_unlock(&dmxdev->mutex);
 910                         return -ERESTARTSYS;
 911                 }
 912                 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
 913                 mutex_unlock(&dmxdevfilter->mutex);
 914                 break;
 915
 916         case DMX_SET_PES_FILTER:
 917                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 918                         mutex_unlock(&dmxdev->mutex);
 919                         return -ERESTARTSYS;
 920                 }
 921                 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
 922                 mutex_unlock(&dmxdevfilter->mutex);
 923                 break;
 924
 925         case DMX_SET_BUFFER_SIZE:
 926                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 927                         mutex_unlock(&dmxdev->mutex);
 928                         return -ERESTARTSYS;
 929                 }
 930                 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
 931                 mutex_unlock(&dmxdevfilter->mutex);
 932                 break;
 933
 934         case DMX_GET_PES_PIDS:
 935                 if (!dmxdev->demux->get_pes_pids) {
 936                         ret = -EINVAL;
 937                         break;
 938                 }
 939                 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
 940                 break;
 941
 942         case DMX_GET_CAPS:
 943                 if (!dmxdev->demux->get_caps) {
 944                         ret = -EINVAL;
 945                         break;
 946                 }
 947                 ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
 948                 break;
 949
 950         case DMX_SET_SOURCE:
 951                 if (!dmxdev->demux->set_source) {
 952                         ret = -EINVAL;
 953                         break;
 954                 }
 955                 ret = dmxdev->demux->set_source(dmxdev->demux, parg);
 956                 break;
 957
 958         case DMX_GET_STC:
 959                 if (!dmxdev->demux->get_stc) {
 960                         ret = -EINVAL;
 961                         break;
 962                 }
 963                 ret = dmxdev->demux->get_stc(dmxdev->demux,
 964                                              ((struct dmx_stc *)parg)->num,
 965                                              &((struct dmx_stc *)parg)->stc,
 966                                              &((struct dmx_stc *)parg)->base);
 967                 break;
 968
 969         default:
 970                 ret = -EINVAL;
 971                 break;
 972         }
 973         mutex_unlock(&dmxdev->mutex);
 974         return ret;
 975 }
 976
 977 static int dvb_demux_ioctl(struct inode *inode, struct file *file,
 978                            unsigned int cmd, unsigned long arg)
 979 {
 980         return dvb_usercopy(inode, file, cmd, arg, dvb_demux_do_ioctl);
 981 }
 982
 983 static unsigned int dvb_demux_poll(struct file *file, poll_table *wait)
 984 {
 985         struct dmxdev_filter *dmxdevfilter = file->private_data;
 986         unsigned int mask = 0;
 987
 988         if (!dmxdevfilter)
 989                 return -EINVAL;
 990
 991         poll_wait(file, &dmxdevfilter->buffer.queue, wait);
 992
 993         if (dmxdevfilter->state != DMXDEV_STATE_GO &&
 994             dmxdevfilter->state != DMXDEV_STATE_DONE &&
 995             dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
 996                 return 0;
 997
 998         if (dmxdevfilter->buffer.error)
 999                 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1000
1001         if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
1002                 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1003
1004         return mask;
1005 }
1006
1007 static int dvb_demux_release(struct inode *inode, struct file *file)
1008 {
1009         struct dmxdev_filter *dmxdevfilter = file->private_data;
1010         struct dmxdev *dmxdev = dmxdevfilter->dev;
1011
1012         int ret;
1013
1014         ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
1015
1016         mutex_lock(&dmxdev->mutex);
1017         dmxdev->dvbdev->users--;
1018         if(dmxdev->dvbdev->users==1 && dmxdev->exit==1) {
1019                 fops_put(file->f_op);
1020                 file->f_op = NULL;
1021                 mutex_unlock(&dmxdev->mutex);
1022                 wake_up(&dmxdev->dvbdev->wait_queue);
1023         } else
1024                 mutex_unlock(&dmxdev->mutex);
1025
1026         return ret;
1027 }
1028
1029 static struct file_operations dvb_demux_fops = {
1030         .owner = THIS_MODULE,
1031         .read = dvb_demux_read,
1032         .ioctl = dvb_demux_ioctl,
1033         .open = dvb_demux_open,
1034         .release = dvb_demux_release,
1035         .poll = dvb_demux_poll,
1036 };
1037
1038 static struct dvb_device dvbdev_demux = {
1039         .priv = NULL,
1040         .users = 1,
1041         .writers = 1,
1042         .fops = &dvb_demux_fops
1043 };
1044
1045 static int dvb_dvr_do_ioctl(struct inode *inode, struct file *file,
1046                             unsigned int cmd, void *parg)
1047 {
1048         struct dvb_device *dvbdev = file->private_data;
1049         struct dmxdev *dmxdev = dvbdev->priv;
1050         unsigned long arg = (unsigned long)parg;
1051         int ret;
1052
1053         if (mutex_lock_interruptible(&dmxdev->mutex))
1054                 return -ERESTARTSYS;
1055
1056         switch (cmd) {
1057         case DMX_SET_BUFFER_SIZE:
1058                 ret = dvb_dvr_set_buffer_size(dmxdev, arg);
1059                 break;
1060
1061         default:
1062                 ret = -EINVAL;
1063                 break;
1064         }
1065         mutex_unlock(&dmxdev->mutex);
1066         return ret;
1067 }
1068
1069 static int dvb_dvr_ioctl(struct inode *inode, struct file *file,
1070                          unsigned int cmd, unsigned long arg)
1071 {
1072         return dvb_usercopy(inode, file, cmd, arg, dvb_dvr_do_ioctl);
1073 }
1074
1075 static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait)
1076 {
1077         struct dvb_device *dvbdev = file->private_data;
1078         struct dmxdev *dmxdev = dvbdev->priv;
1079         unsigned int mask = 0;
1080
1081         dprintk("function : %s\n", __func__);
1082
1083         poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1084
1085         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1086                 if (dmxdev->dvr_buffer.error)
1087                         mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1088
1089                 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
1090                         mask |= (POLLIN | POLLRDNORM | POLLPRI);
1091         } else
1092                 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1093
1094         return mask;
1095 }
1096
1097 static struct file_operations dvb_dvr_fops = {
1098         .owner = THIS_MODULE,
1099         .read = dvb_dvr_read,
1100         .write = dvb_dvr_write,
1101         .ioctl = dvb_dvr_ioctl,
1102         .open = dvb_dvr_open,
1103         .release = dvb_dvr_release,
1104         .poll = dvb_dvr_poll,
1105 };
1106
1107 static struct dvb_device dvbdev_dvr = {
1108         .priv = NULL,
1109         .readers = 1,
1110         .users = 1,
1111         .fops = &dvb_dvr_fops
1112 };
1113
1114 int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1115 {
1116         int i;
1117
1118         if (dmxdev->demux->open(dmxdev->demux) < 0)
1119                 return -EUSERS;
1120
1121         dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
1122         if (!dmxdev->filter)
1123                 return -ENOMEM;
1124
1125         mutex_init(&dmxdev->mutex);
1126         spin_lock_init(&dmxdev->lock);
1127         for (i = 0; i < dmxdev->filternum; i++) {
1128                 dmxdev->filter[i].dev = dmxdev;
1129                 dmxdev->filter[i].buffer.data = NULL;
1130                 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1131                                             DMXDEV_STATE_FREE);
1132         }
1133
1134         dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1135                             DVB_DEVICE_DEMUX);
1136         dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1137                             dmxdev, DVB_DEVICE_DVR);
1138
1139         dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
1140
1141         return 0;
1142 }
1143
1144 EXPORT_SYMBOL(dvb_dmxdev_init);
1145
1146 void dvb_dmxdev_release(struct dmxdev *dmxdev)
1147 {
1148         dmxdev->exit=1;
1149         if (dmxdev->dvbdev->users > 1) {
1150                 wait_event(dmxdev->dvbdev->wait_queue,
1151                                 dmxdev->dvbdev->users==1);
1152         }
1153         if (dmxdev->dvr_dvbdev->users > 1) {
1154                 wait_event(dmxdev->dvr_dvbdev->wait_queue,
1155                                 dmxdev->dvr_dvbdev->users==1);
1156         }
1157
1158         dvb_unregister_device(dmxdev->dvbdev);
1159         dvb_unregister_device(dmxdev->dvr_dvbdev);
1160
1161         vfree(dmxdev->filter);
1162         dmxdev->filter = NULL;
1163         dmxdev->demux->close(dmxdev->demux);
1164 }
1165
1166 EXPORT_SYMBOL(dvb_dmxdev_release);