SAFE public projects git trees. - safe/jmp/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(src, (u8 *)buf, avail, 1);
 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", __FUNCTION__);
 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 inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
 263                                                *dmxdevfilter, int state)
 264 {
 265         spin_lock_irq(&dmxdevfilter->dev->lock);
 266         dmxdevfilter->state = state;
 267         spin_unlock_irq(&dmxdevfilter->dev->lock);
 268 }
 269
 270 static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
 271                                       unsigned long size)
 272 {
 273         struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
 274         void *mem;
 275
 276         if (buf->size == size)
 277                 return 0;
 278         if (dmxdevfilter->state >= DMXDEV_STATE_GO)
 279                 return -EBUSY;
 280         spin_lock_irq(&dmxdevfilter->dev->lock);
 281         mem = buf->data;
 282         buf->data = NULL;
 283         buf->size = size;
 284         dvb_ringbuffer_flush(buf);
 285         spin_unlock_irq(&dmxdevfilter->dev->lock);
 286         vfree(mem);
 287
 288         if (buf->size) {
 289                 mem = vmalloc(dmxdevfilter->buffer.size);
 290                 if (!mem)
 291                         return -ENOMEM;
 292                 spin_lock_irq(&dmxdevfilter->dev->lock);
 293                 buf->data = mem;
 294                 spin_unlock_irq(&dmxdevfilter->dev->lock);
 295         }
 296         return 0;
 297 }
 298
 299 static void dvb_dmxdev_filter_timeout(unsigned long data)
 300 {
 301         struct dmxdev_filter *dmxdevfilter = (struct dmxdev_filter *)data;
 302
 303         dmxdevfilter->buffer.error = -ETIMEDOUT;
 304         spin_lock_irq(&dmxdevfilter->dev->lock);
 305         dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
 306         spin_unlock_irq(&dmxdevfilter->dev->lock);
 307         wake_up(&dmxdevfilter->buffer.queue);
 308 }
 309
 310 static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
 311 {
 312         struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
 313
 314         del_timer(&dmxdevfilter->timer);
 315         if (para->timeout) {
 316                 dmxdevfilter->timer.function = dvb_dmxdev_filter_timeout;
 317                 dmxdevfilter->timer.data = (unsigned long)dmxdevfilter;
 318                 dmxdevfilter->timer.expires =
 319                     jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
 320                 add_timer(&dmxdevfilter->timer);
 321         }
 322 }
 323
 324 static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
 325                                        const u8 *buffer2, size_t buffer2_len,
 326                                        struct dmx_section_filter *filter,
 327                                        enum dmx_success success)
 328 {
 329         struct dmxdev_filter *dmxdevfilter = filter->priv;
 330         int ret;
 331
 332         if (dmxdevfilter->buffer.error) {
 333                 wake_up(&dmxdevfilter->buffer.queue);
 334                 return 0;
 335         }
 336         spin_lock(&dmxdevfilter->dev->lock);
 337         if (dmxdevfilter->state != DMXDEV_STATE_GO) {
 338                 spin_unlock(&dmxdevfilter->dev->lock);
 339                 return 0;
 340         }
 341         del_timer(&dmxdevfilter->timer);
 342         dprintk("dmxdev: section callback %02x %02x %02x %02x %02x %02x\n",
 343                 buffer1[0], buffer1[1],
 344                 buffer1[2], buffer1[3], buffer1[4], buffer1[5]);
 345         ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1,
 346                                       buffer1_len);
 347         if (ret == buffer1_len) {
 348                 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2,
 349                                               buffer2_len);
 350         }
 351         if (ret < 0) {
 352                 dvb_ringbuffer_flush(&dmxdevfilter->buffer);
 353                 dmxdevfilter->buffer.error = ret;
 354         }
 355         if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
 356                 dmxdevfilter->state = DMXDEV_STATE_DONE;
 357         spin_unlock(&dmxdevfilter->dev->lock);
 358         wake_up(&dmxdevfilter->buffer.queue);
 359         return 0;
 360 }
 361
 362 static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
 363                                   const u8 *buffer2, size_t buffer2_len,
 364                                   struct dmx_ts_feed *feed,
 365                                   enum dmx_success success)
 366 {
 367         struct dmxdev_filter *dmxdevfilter = feed->priv;
 368         struct dvb_ringbuffer *buffer;
 369         int ret;
 370
 371         spin_lock(&dmxdevfilter->dev->lock);
 372         if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
 373                 spin_unlock(&dmxdevfilter->dev->lock);
 374                 return 0;
 375         }
 376
 377         if (dmxdevfilter->params.pes.output == DMX_OUT_TAP
 378             || dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP)
 379                 buffer = &dmxdevfilter->buffer;
 380         else
 381                 buffer = &dmxdevfilter->dev->dvr_buffer;
 382         if (buffer->error) {
 383                 spin_unlock(&dmxdevfilter->dev->lock);
 384                 wake_up(&buffer->queue);
 385                 return 0;
 386         }
 387         ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
 388         if (ret == buffer1_len)
 389                 ret = dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len);
 390         if (ret < 0) {
 391                 dvb_ringbuffer_flush(buffer);
 392                 buffer->error = ret;
 393         }
 394         spin_unlock(&dmxdevfilter->dev->lock);
 395         wake_up(&buffer->queue);
 396         return 0;
 397 }
 398
 399 /* stop feed but only mark the specified filter as stopped (state set) */
 400 static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
 401 {
 402         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 403
 404         switch (dmxdevfilter->type) {
 405         case DMXDEV_TYPE_SEC:
 406                 del_timer(&dmxdevfilter->timer);
 407                 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
 408                 break;
 409         case DMXDEV_TYPE_PES:
 410                 dmxdevfilter->feed.ts->stop_filtering(dmxdevfilter->feed.ts);
 411                 break;
 412         default:
 413                 return -EINVAL;
 414         }
 415         return 0;
 416 }
 417
 418 /* start feed associated with the specified filter */
 419 static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
 420 {
 421         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 422
 423         switch (filter->type) {
 424         case DMXDEV_TYPE_SEC:
 425                 return filter->feed.sec->start_filtering(filter->feed.sec);
 426         case DMXDEV_TYPE_PES:
 427                 return filter->feed.ts->start_filtering(filter->feed.ts);
 428         default:
 429                 return -EINVAL;
 430         }
 431
 432         return 0;
 433 }
 434
 435 /* restart section feed if it has filters left associated with it,
 436    otherwise release the feed */
 437 static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
 438 {
 439         int i;
 440         struct dmxdev *dmxdev = filter->dev;
 441         u16 pid = filter->params.sec.pid;
 442
 443         for (i = 0; i < dmxdev->filternum; i++)
 444                 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 445                     dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 446                     dmxdev->filter[i].params.sec.pid == pid) {
 447                         dvb_dmxdev_feed_start(&dmxdev->filter[i]);
 448                         return 0;
 449                 }
 450
 451         filter->dev->demux->release_section_feed(dmxdev->demux,
 452                                                  filter->feed.sec);
 453
 454         return 0;
 455 }
 456
 457 static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
 458 {
 459         if (dmxdevfilter->state < DMXDEV_STATE_GO)
 460                 return 0;
 461
 462         switch (dmxdevfilter->type) {
 463         case DMXDEV_TYPE_SEC:
 464                 if (!dmxdevfilter->feed.sec)
 465                         break;
 466                 dvb_dmxdev_feed_stop(dmxdevfilter);
 467                 if (dmxdevfilter->filter.sec)
 468                         dmxdevfilter->feed.sec->
 469                             release_filter(dmxdevfilter->feed.sec,
 470                                            dmxdevfilter->filter.sec);
 471                 dvb_dmxdev_feed_restart(dmxdevfilter);
 472                 dmxdevfilter->feed.sec = NULL;
 473                 break;
 474         case DMXDEV_TYPE_PES:
 475                 if (!dmxdevfilter->feed.ts)
 476                         break;
 477                 dvb_dmxdev_feed_stop(dmxdevfilter);
 478                 dmxdevfilter->dev->demux->
 479                     release_ts_feed(dmxdevfilter->dev->demux,
 480                                     dmxdevfilter->feed.ts);
 481                 dmxdevfilter->feed.ts = NULL;
 482                 break;
 483         default:
 484                 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)
 485                         return 0;
 486                 return -EINVAL;
 487         }
 488
 489         dvb_ringbuffer_flush(&dmxdevfilter->buffer);
 490         return 0;
 491 }
 492
 493 static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
 494 {
 495         if (dmxdevfilter->state < DMXDEV_STATE_SET)
 496                 return 0;
 497
 498         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 499         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 500         return 0;
 501 }
 502
 503 static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
 504 {
 505         struct dmxdev *dmxdev = filter->dev;
 506         void *mem;
 507         int ret, i;
 508
 509         if (filter->state < DMXDEV_STATE_SET)
 510                 return -EINVAL;
 511
 512         if (filter->state >= DMXDEV_STATE_GO)
 513                 dvb_dmxdev_filter_stop(filter);
 514
 515         if (!filter->buffer.data) {
 516                 mem = vmalloc(filter->buffer.size);
 517                 if (!mem)
 518                         return -ENOMEM;
 519                 spin_lock_irq(&filter->dev->lock);
 520                 filter->buffer.data = mem;
 521                 spin_unlock_irq(&filter->dev->lock);
 522         }
 523
 524         dvb_ringbuffer_flush(&filter->buffer);
 525
 526         switch (filter->type) {
 527         case DMXDEV_TYPE_SEC:
 528         {
 529                 struct dmx_sct_filter_params *para = &filter->params.sec;
 530                 struct dmx_section_filter **secfilter = &filter->filter.sec;
 531                 struct dmx_section_feed **secfeed = &filter->feed.sec;
 532
 533                 *secfilter = NULL;
 534                 *secfeed = NULL;
 535
 536
 537                 /* find active filter/feed with same PID */
 538                 for (i = 0; i < dmxdev->filternum; i++) {
 539                         if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 540                             dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 541                             dmxdev->filter[i].params.sec.pid == para->pid) {
 542                                 *secfeed = dmxdev->filter[i].feed.sec;
 543                                 break;
 544                         }
 545                 }
 546
 547                 /* if no feed found, try to allocate new one */
 548                 if (!*secfeed) {
 549                         ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,
 550                                                                    secfeed,
 551                                                                    dvb_dmxdev_section_callback);
 552                         if (ret < 0) {
 553                                 printk("DVB (%s): could not alloc feed\n",
 554                                        __FUNCTION__);
 555                                 return ret;
 556                         }
 557
 558                         ret = (*secfeed)->set(*secfeed, para->pid, 32768,
 559                                               (para->flags & DMX_CHECK_CRC) ? 1 : 0);
 560                         if (ret < 0) {
 561                                 printk("DVB (%s): could not set feed\n",
 562                                        __FUNCTION__);
 563                                 dvb_dmxdev_feed_restart(filter);
 564                                 return ret;
 565                         }
 566                 } else {
 567                         dvb_dmxdev_feed_stop(filter);
 568                 }
 569
 570                 ret = (*secfeed)->allocate_filter(*secfeed, secfilter);
 571                 if (ret < 0) {
 572                         dvb_dmxdev_feed_restart(filter);
 573                         filter->feed.sec->start_filtering(*secfeed);
 574                         dprintk("could not get filter\n");
 575                         return ret;
 576                 }
 577
 578                 (*secfilter)->priv = filter;
 579
 580                 memcpy(&((*secfilter)->filter_value[3]),
 581                        &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);
 582                 memcpy(&(*secfilter)->filter_mask[3],
 583                        &para->filter.mask[1], DMX_FILTER_SIZE - 1);
 584                 memcpy(&(*secfilter)->filter_mode[3],
 585                        &para->filter.mode[1], DMX_FILTER_SIZE - 1);
 586
 587                 (*secfilter)->filter_value[0] = para->filter.filter[0];
 588                 (*secfilter)->filter_mask[0] = para->filter.mask[0];
 589                 (*secfilter)->filter_mode[0] = para->filter.mode[0];
 590                 (*secfilter)->filter_mask[1] = 0;
 591                 (*secfilter)->filter_mask[2] = 0;
 592
 593                 filter->todo = 0;
 594
 595                 ret = filter->feed.sec->start_filtering(filter->feed.sec);
 596                 if (ret < 0)
 597                         return ret;
 598
 599                 dvb_dmxdev_filter_timer(filter);
 600                 break;
 601         }
 602         case DMXDEV_TYPE_PES:
 603         {
 604                 struct timespec timeout = { 0 };
 605                 struct dmx_pes_filter_params *para = &filter->params.pes;
 606                 dmx_output_t otype;
 607                 int ret;
 608                 int ts_type;
 609                 enum dmx_ts_pes ts_pes;
 610                 struct dmx_ts_feed **tsfeed = &filter->feed.ts;
 611
 612                 filter->feed.ts = NULL;
 613                 otype = para->output;
 614
 615                 ts_pes = (enum dmx_ts_pes)para->pes_type;
 616
 617                 if (ts_pes < DMX_PES_OTHER)
 618                         ts_type = TS_DECODER;
 619                 else
 620                         ts_type = 0;
 621
 622                 if (otype == DMX_OUT_TS_TAP)
 623                         ts_type |= TS_PACKET;
 624                 else if (otype == DMX_OUT_TSDEMUX_TAP)
 625                         ts_type |= TS_PACKET | TS_DEMUX;
 626                 else if (otype == DMX_OUT_TAP)
 627                         ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY;
 628
 629                 ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux,
 630                                                       tsfeed,
 631                                                       dvb_dmxdev_ts_callback);
 632                 if (ret < 0)
 633                         return ret;
 634
 635                 (*tsfeed)->priv = filter;
 636
 637                 ret = (*tsfeed)->set(*tsfeed, para->pid, ts_type, ts_pes,
 638                                      32768, timeout);
 639                 if (ret < 0) {
 640                         dmxdev->demux->release_ts_feed(dmxdev->demux,
 641                                                        *tsfeed);
 642                         return ret;
 643                 }
 644
 645                 ret = filter->feed.ts->start_filtering(filter->feed.ts);
 646                 if (ret < 0) {
 647                         dmxdev->demux->release_ts_feed(dmxdev->demux,
 648                                                        *tsfeed);
 649                         return ret;
 650                 }
 651
 652                 break;
 653         }
 654         default:
 655                 return -EINVAL;
 656         }
 657
 658         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 659         return 0;
 660 }
 661
 662 static int dvb_demux_open(struct inode *inode, struct file *file)
 663 {
 664         struct dvb_device *dvbdev = file->private_data;
 665         struct dmxdev *dmxdev = dvbdev->priv;
 666         int i;
 667         struct dmxdev_filter *dmxdevfilter;
 668
 669         if (!dmxdev->filter)
 670                 return -EINVAL;
 671
 672         if (mutex_lock_interruptible(&dmxdev->mutex))
 673                 return -ERESTARTSYS;
 674
 675         for (i = 0; i < dmxdev->filternum; i++)
 676                 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
 677                         break;
 678
 679         if (i == dmxdev->filternum) {
 680                 mutex_unlock(&dmxdev->mutex);
 681                 return -EMFILE;
 682         }
 683
 684         dmxdevfilter = &dmxdev->filter[i];
 685         mutex_init(&dmxdevfilter->mutex);
 686         file->private_data = dmxdevfilter;
 687
 688         dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);
 689         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 690         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 691         dmxdevfilter->feed.ts = NULL;
 692         init_timer(&dmxdevfilter->timer);
 693
 694         dvbdev->users++;
 695
 696         mutex_unlock(&dmxdev->mutex);
 697         return 0;
 698 }
 699
 700 static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
 701                                   struct dmxdev_filter *dmxdevfilter)
 702 {
 703         mutex_lock(&dmxdev->mutex);
 704         mutex_lock(&dmxdevfilter->mutex);
 705
 706         dvb_dmxdev_filter_stop(dmxdevfilter);
 707         dvb_dmxdev_filter_reset(dmxdevfilter);
 708
 709         if (dmxdevfilter->buffer.data) {
 710                 void *mem = dmxdevfilter->buffer.data;
 711
 712                 spin_lock_irq(&dmxdev->lock);
 713                 dmxdevfilter->buffer.data = NULL;
 714                 spin_unlock_irq(&dmxdev->lock);
 715                 vfree(mem);
 716         }
 717
 718         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
 719         wake_up(&dmxdevfilter->buffer.queue);
 720         mutex_unlock(&dmxdevfilter->mutex);
 721         mutex_unlock(&dmxdev->mutex);
 722         return 0;
 723 }
 724
 725 static inline void invert_mode(dmx_filter_t *filter)
 726 {
 727         int i;
 728
 729         for (i = 0; i < DMX_FILTER_SIZE; i++)
 730                 filter->mode[i] ^= 0xff;
 731 }
 732
 733 static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
 734                                  struct dmxdev_filter *dmxdevfilter,
 735                                  struct dmx_sct_filter_params *params)
 736 {
 737         dprintk("function : %s\n", __FUNCTION__);
 738
 739         dvb_dmxdev_filter_stop(dmxdevfilter);
 740
 741         dmxdevfilter->type = DMXDEV_TYPE_SEC;
 742         memcpy(&dmxdevfilter->params.sec,
 743                params, sizeof(struct dmx_sct_filter_params));
 744         invert_mode(&dmxdevfilter->params.sec.filter);
 745         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 746
 747         if (params->flags & DMX_IMMEDIATE_START)
 748                 return dvb_dmxdev_filter_start(dmxdevfilter);
 749
 750         return 0;
 751 }
 752
 753 static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
 754                                      struct dmxdev_filter *dmxdevfilter,
 755                                      struct dmx_pes_filter_params *params)
 756 {
 757         dvb_dmxdev_filter_stop(dmxdevfilter);
 758
 759         if (params->pes_type > DMX_PES_OTHER || params->pes_type < 0)
 760                 return -EINVAL;
 761
 762         dmxdevfilter->type = DMXDEV_TYPE_PES;
 763         memcpy(&dmxdevfilter->params, params,
 764                sizeof(struct dmx_pes_filter_params));
 765
 766         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 767
 768         if (params->flags & DMX_IMMEDIATE_START)
 769                 return dvb_dmxdev_filter_start(dmxdevfilter);
 770
 771         return 0;
 772 }
 773
 774 static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
 775                                    struct file *file, char __user *buf,
 776                                    size_t count, loff_t *ppos)
 777 {
 778         int result, hcount;
 779         int done = 0;
 780
 781         if (dfil->todo <= 0) {
 782                 hcount = 3 + dfil->todo;
 783                 if (hcount > count)
 784                         hcount = count;
 785                 result = dvb_dmxdev_buffer_read(&dfil->buffer,
 786                                                 file->f_flags & O_NONBLOCK,
 787                                                 buf, hcount, ppos);
 788                 if (result < 0) {
 789                         dfil->todo = 0;
 790                         return result;
 791                 }
 792                 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
 793                         return -EFAULT;
 794                 buf += result;
 795                 done = result;
 796                 count -= result;
 797                 dfil->todo -= result;
 798                 if (dfil->todo > -3)
 799                         return done;
 800                 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
 801                 if (!count)
 802                         return done;
 803         }
 804         if (count > dfil->todo)
 805                 count = dfil->todo;
 806         result = dvb_dmxdev_buffer_read(&dfil->buffer,
 807                                         file->f_flags & O_NONBLOCK,
 808                                         buf, count, ppos);
 809         if (result < 0)
 810                 return result;
 811         dfil->todo -= result;
 812         return (result + done);
 813 }
 814
 815 static ssize_t
 816 dvb_demux_read(struct file *file, char __user *buf, size_t count,
 817                loff_t *ppos)
 818 {
 819         struct dmxdev_filter *dmxdevfilter = file->private_data;
 820         int ret;
 821
 822         if (mutex_lock_interruptible(&dmxdevfilter->mutex))
 823                 return -ERESTARTSYS;
 824
 825         if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
 826                 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
 827         else
 828                 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
 829                                              file->f_flags & O_NONBLOCK,
 830                                              buf, count, ppos);
 831
 832         mutex_unlock(&dmxdevfilter->mutex);
 833         return ret;
 834 }
 835
 836 static int dvb_demux_do_ioctl(struct inode *inode, struct file *file,
 837                               unsigned int cmd, void *parg)
 838 {
 839         struct dmxdev_filter *dmxdevfilter = file->private_data;
 840         struct dmxdev *dmxdev = dmxdevfilter->dev;
 841         unsigned long arg = (unsigned long)parg;
 842         int ret = 0;
 843
 844         if (mutex_lock_interruptible(&dmxdev->mutex))
 845                 return -ERESTARTSYS;
 846
 847         switch (cmd) {
 848         case DMX_START:
 849                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 850                         mutex_unlock(&dmxdev->mutex);
 851                         return -ERESTARTSYS;
 852                 }
 853                 if (dmxdevfilter->state < DMXDEV_STATE_SET)
 854                         ret = -EINVAL;
 855                 else
 856                         ret = dvb_dmxdev_filter_start(dmxdevfilter);
 857                 mutex_unlock(&dmxdevfilter->mutex);
 858                 break;
 859
 860         case DMX_STOP:
 861                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 862                         mutex_unlock(&dmxdev->mutex);
 863                         return -ERESTARTSYS;
 864                 }
 865                 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
 866                 mutex_unlock(&dmxdevfilter->mutex);
 867                 break;
 868
 869         case DMX_SET_FILTER:
 870                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 871                         mutex_unlock(&dmxdev->mutex);
 872                         return -ERESTARTSYS;
 873                 }
 874                 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
 875                 mutex_unlock(&dmxdevfilter->mutex);
 876                 break;
 877
 878         case DMX_SET_PES_FILTER:
 879                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 880                         mutex_unlock(&dmxdev->mutex);
 881                         return -ERESTARTSYS;
 882                 }
 883                 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
 884                 mutex_unlock(&dmxdevfilter->mutex);
 885                 break;
 886
 887         case DMX_SET_BUFFER_SIZE:
 888                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 889                         mutex_unlock(&dmxdev->mutex);
 890                         return -ERESTARTSYS;
 891                 }
 892                 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
 893                 mutex_unlock(&dmxdevfilter->mutex);
 894                 break;
 895
 896         case DMX_GET_PES_PIDS:
 897                 if (!dmxdev->demux->get_pes_pids) {
 898                         ret = -EINVAL;
 899                         break;
 900                 }
 901                 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
 902                 break;
 903
 904         case DMX_GET_CAPS:
 905                 if (!dmxdev->demux->get_caps) {
 906                         ret = -EINVAL;
 907                         break;
 908                 }
 909                 ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
 910                 break;
 911
 912         case DMX_SET_SOURCE:
 913                 if (!dmxdev->demux->set_source) {
 914                         ret = -EINVAL;
 915                         break;
 916                 }
 917                 ret = dmxdev->demux->set_source(dmxdev->demux, parg);
 918                 break;
 919
 920         case DMX_GET_STC:
 921                 if (!dmxdev->demux->get_stc) {
 922                         ret = -EINVAL;
 923                         break;
 924                 }
 925                 ret = dmxdev->demux->get_stc(dmxdev->demux,
 926                                              ((struct dmx_stc *)parg)->num,
 927                                              &((struct dmx_stc *)parg)->stc,
 928                                              &((struct dmx_stc *)parg)->base);
 929                 break;
 930
 931         default:
 932                 ret = -EINVAL;
 933                 break;
 934         }
 935         mutex_unlock(&dmxdev->mutex);
 936         return ret;
 937 }
 938
 939 static int dvb_demux_ioctl(struct inode *inode, struct file *file,
 940                            unsigned int cmd, unsigned long arg)
 941 {
 942         return dvb_usercopy(inode, file, cmd, arg, dvb_demux_do_ioctl);
 943 }
 944
 945 static unsigned int dvb_demux_poll(struct file *file, poll_table *wait)
 946 {
 947         struct dmxdev_filter *dmxdevfilter = file->private_data;
 948         unsigned int mask = 0;
 949
 950         if (!dmxdevfilter)
 951                 return -EINVAL;
 952
 953         poll_wait(file, &dmxdevfilter->buffer.queue, wait);
 954
 955         if (dmxdevfilter->state != DMXDEV_STATE_GO &&
 956             dmxdevfilter->state != DMXDEV_STATE_DONE &&
 957             dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
 958                 return 0;
 959
 960         if (dmxdevfilter->buffer.error)
 961                 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
 962
 963         if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
 964                 mask |= (POLLIN | POLLRDNORM | POLLPRI);
 965
 966         return mask;
 967 }
 968
 969 static int dvb_demux_release(struct inode *inode, struct file *file)
 970 {
 971         struct dmxdev_filter *dmxdevfilter = file->private_data;
 972         struct dmxdev *dmxdev = dmxdevfilter->dev;
 973
 974         int ret;
 975
 976         ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
 977
 978         mutex_lock(&dmxdev->mutex);
 979         dmxdev->dvbdev->users--;
 980         if(dmxdev->dvbdev->users==1 && dmxdev->exit==1) {
 981                 fops_put(file->f_op);
 982                 file->f_op = NULL;
 983                 mutex_unlock(&dmxdev->mutex);
 984                 wake_up(&dmxdev->dvbdev->wait_queue);
 985         } else
 986                 mutex_unlock(&dmxdev->mutex);
 987
 988         return ret;
 989 }
 990
 991 static struct file_operations dvb_demux_fops = {
 992         .owner = THIS_MODULE,
 993         .read = dvb_demux_read,
 994         .ioctl = dvb_demux_ioctl,
 995         .open = dvb_demux_open,
 996         .release = dvb_demux_release,
 997         .poll = dvb_demux_poll,
 998 };
 999
1000 static struct dvb_device dvbdev_demux = {
1001         .priv = NULL,
1002         .users = 1,
1003         .writers = 1,
1004         .fops = &dvb_demux_fops
1005 };
1006
1007 static int dvb_dvr_do_ioctl(struct inode *inode, struct file *file,
1008                             unsigned int cmd, void *parg)
1009 {
1010         struct dvb_device *dvbdev = file->private_data;
1011         struct dmxdev *dmxdev = dvbdev->priv;
1012         int ret;
1013
1014         if (mutex_lock_interruptible(&dmxdev->mutex))
1015                 return -ERESTARTSYS;
1016
1017         switch (cmd) {
1018         case DMX_SET_BUFFER_SIZE:
1019                 // FIXME: implement
1020                 ret = 0;
1021                 break;
1022
1023         default:
1024                 ret = -EINVAL;
1025                 break;
1026         }
1027         mutex_unlock(&dmxdev->mutex);
1028         return ret;
1029 }
1030
1031 static int dvb_dvr_ioctl(struct inode *inode, struct file *file,
1032                          unsigned int cmd, unsigned long arg)
1033 {
1034         return dvb_usercopy(inode, file, cmd, arg, dvb_dvr_do_ioctl);
1035 }
1036
1037 static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait)
1038 {
1039         struct dvb_device *dvbdev = file->private_data;
1040         struct dmxdev *dmxdev = dvbdev->priv;
1041         unsigned int mask = 0;
1042
1043         dprintk("function : %s\n", __FUNCTION__);
1044
1045         poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1046
1047         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1048                 if (dmxdev->dvr_buffer.error)
1049                         mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1050
1051                 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
1052                         mask |= (POLLIN | POLLRDNORM | POLLPRI);
1053         } else
1054                 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1055
1056         return mask;
1057 }
1058
1059 static struct file_operations dvb_dvr_fops = {
1060         .owner = THIS_MODULE,
1061         .read = dvb_dvr_read,
1062         .write = dvb_dvr_write,
1063         .ioctl = dvb_dvr_ioctl,
1064         .open = dvb_dvr_open,
1065         .release = dvb_dvr_release,
1066         .poll = dvb_dvr_poll,
1067 };
1068
1069 static struct dvb_device dvbdev_dvr = {
1070         .priv = NULL,
1071         .readers = 1,
1072         .users = 1,
1073         .fops = &dvb_dvr_fops
1074 };
1075
1076 int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1077 {
1078         int i;
1079
1080         if (dmxdev->demux->open(dmxdev->demux) < 0)
1081                 return -EUSERS;
1082
1083         dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
1084         if (!dmxdev->filter)
1085                 return -ENOMEM;
1086
1087         mutex_init(&dmxdev->mutex);
1088         spin_lock_init(&dmxdev->lock);
1089         for (i = 0; i < dmxdev->filternum; i++) {
1090                 dmxdev->filter[i].dev = dmxdev;
1091                 dmxdev->filter[i].buffer.data = NULL;
1092                 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1093                                             DMXDEV_STATE_FREE);
1094         }
1095
1096         dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1097                             DVB_DEVICE_DEMUX);
1098         dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1099                             dmxdev, DVB_DEVICE_DVR);
1100
1101         dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
1102
1103         return 0;
1104 }
1105
1106 EXPORT_SYMBOL(dvb_dmxdev_init);
1107
1108 void dvb_dmxdev_release(struct dmxdev *dmxdev)
1109 {
1110         dmxdev->exit=1;
1111         if (dmxdev->dvbdev->users > 1) {
1112                 wait_event(dmxdev->dvbdev->wait_queue,
1113                                 dmxdev->dvbdev->users==1);
1114         }
1115         if (dmxdev->dvr_dvbdev->users > 1) {
1116                 wait_event(dmxdev->dvr_dvbdev->wait_queue,
1117                                 dmxdev->dvr_dvbdev->users==1);
1118         }
1119
1120         dvb_unregister_device(dmxdev->dvbdev);
1121         dvb_unregister_device(dmxdev->dvr_dvbdev);
1122
1123         vfree(dmxdev->filter);
1124         dmxdev->filter = NULL;
1125         dmxdev->demux->close(dmxdev->demux);
1126 }
1127
1128 EXPORT_SYMBOL(dvb_dmxdev_release);