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/moduleparam.h>
  28 #include <linux/poll.h>
  29 #include <linux/ioctl.h>
  30 #include <linux/wait.h>
  31 #include <asm/uaccess.h>
  32 #include <asm/system.h>
  33 #include "dmxdev.h"
  34
  35 static int debug;
  36
  37 module_param(debug, int, 0644);
  38 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
  39
  40 #define dprintk if (debug) printk
  41
  42 static int dvb_dmxdev_buffer_write(struct dvb_ringbuffer *buf,
  43                                    const u8 *src, size_t len)
  44 {
  45         ssize_t free;
  46
  47         if (!len)
  48                 return 0;
  49         if (!buf->data)
  50                 return 0;
  51
  52         free = dvb_ringbuffer_free(buf);
  53         if (len > free) {
  54                 dprintk("dmxdev: buffer overflow\n");
  55                 return -EOVERFLOW;
  56         }
  57
  58         return dvb_ringbuffer_write(buf, src, len);
  59 }
  60
  61 static ssize_t dvb_dmxdev_buffer_read(struct dvb_ringbuffer *src,
  62                                       int non_blocking, char __user *buf,
  63                                       size_t count, loff_t *ppos)
  64 {
  65         size_t todo;
  66         ssize_t avail;
  67         ssize_t ret = 0;
  68
  69         if (!src->data)
  70                 return 0;
  71
  72         if (src->error) {
  73                 ret = src->error;
  74                 dvb_ringbuffer_flush(src);
  75                 return ret;
  76         }
  77
  78         for (todo = count; todo > 0; todo -= ret) {
  79                 if (non_blocking && dvb_ringbuffer_empty(src)) {
  80                         ret = -EWOULDBLOCK;
  81                         break;
  82                 }
  83
  84                 ret = wait_event_interruptible(src->queue,
  85                                                !dvb_ringbuffer_empty(src) ||
  86                                                (src->error != 0));
  87                 if (ret < 0)
  88                         break;
  89
  90                 if (src->error) {
  91                         ret = src->error;
  92                         dvb_ringbuffer_flush(src);
  93                         break;
  94                 }
  95
  96                 avail = dvb_ringbuffer_avail(src);
  97                 if (avail > todo)
  98                         avail = todo;
  99
 100                 ret = dvb_ringbuffer_read(src, buf, avail, 1);
 101                 if (ret < 0)
 102                         break;
 103
 104                 buf += ret;
 105         }
 106
 107         return (count - todo) ? (count - todo) : ret;
 108 }
 109
 110 static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type)
 111 {
 112         struct list_head *head, *pos;
 113
 114         head = demux->get_frontends(demux);
 115         if (!head)
 116                 return NULL;
 117         list_for_each(pos, head)
 118                 if (DMX_FE_ENTRY(pos)->source == type)
 119                         return DMX_FE_ENTRY(pos);
 120
 121         return NULL;
 122 }
 123
 124 static int dvb_dvr_open(struct inode *inode, struct file *file)
 125 {
 126         struct dvb_device *dvbdev = file->private_data;
 127         struct dmxdev *dmxdev = dvbdev->priv;
 128         struct dmx_frontend *front;
 129
 130         dprintk("function : %s\n", __FUNCTION__);
 131
 132         if (mutex_lock_interruptible(&dmxdev->mutex))
 133                 return -ERESTARTSYS;
 134
 135         if (dmxdev->exit) {
 136                 mutex_unlock(&dmxdev->mutex);
 137                 return -ENODEV;
 138         }
 139
 140         if ((file->f_flags & O_ACCMODE) == O_RDWR) {
 141                 if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) {
 142                         mutex_unlock(&dmxdev->mutex);
 143                         return -EOPNOTSUPP;
 144                 }
 145         }
 146
 147         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
 148                 void *mem;
 149                 if (!dvbdev->readers) {
 150                         mutex_unlock(&dmxdev->mutex);
 151                         return -EBUSY;
 152                 }
 153                 mem = vmalloc(DVR_BUFFER_SIZE);
 154                 if (!mem) {
 155                         mutex_unlock(&dmxdev->mutex);
 156                         return -ENOMEM;
 157                 }
 158                 dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE);
 159                 dvbdev->readers--;
 160         }
 161
 162         if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
 163                 dmxdev->dvr_orig_fe = dmxdev->demux->frontend;
 164
 165                 if (!dmxdev->demux->write) {
 166                         mutex_unlock(&dmxdev->mutex);
 167                         return -EOPNOTSUPP;
 168                 }
 169
 170                 front = get_fe(dmxdev->demux, DMX_MEMORY_FE);
 171
 172                 if (!front) {
 173                         mutex_unlock(&dmxdev->mutex);
 174                         return -EINVAL;
 175                 }
 176                 dmxdev->demux->disconnect_frontend(dmxdev->demux);
 177                 dmxdev->demux->connect_frontend(dmxdev->demux, front);
 178         }
 179         dvbdev->users++;
 180         mutex_unlock(&dmxdev->mutex);
 181         return 0;
 182 }
 183
 184 static int dvb_dvr_release(struct inode *inode, struct file *file)
 185 {
 186         struct dvb_device *dvbdev = file->private_data;
 187         struct dmxdev *dmxdev = dvbdev->priv;
 188
 189         mutex_lock(&dmxdev->mutex);
 190
 191         if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
 192                 dmxdev->demux->disconnect_frontend(dmxdev->demux);
 193                 dmxdev->demux->connect_frontend(dmxdev->demux,
 194                                                 dmxdev->dvr_orig_fe);
 195         }
 196         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
 197                 dvbdev->readers++;
 198                 if (dmxdev->dvr_buffer.data) {
 199                         void *mem = dmxdev->dvr_buffer.data;
 200                         mb();
 201                         spin_lock_irq(&dmxdev->lock);
 202                         dmxdev->dvr_buffer.data = NULL;
 203                         spin_unlock_irq(&dmxdev->lock);
 204                         vfree(mem);
 205                 }
 206         }
 207         /* TODO */
 208         dvbdev->users--;
 209         if(dvbdev->users==-1 && dmxdev->exit==1) {
 210                 fops_put(file->f_op);
 211                 file->f_op = NULL;
 212                 mutex_unlock(&dmxdev->mutex);
 213                 wake_up(&dvbdev->wait_queue);
 214         } else
 215                 mutex_unlock(&dmxdev->mutex);
 216
 217         return 0;
 218 }
 219
 220 static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
 221                              size_t count, loff_t *ppos)
 222 {
 223         struct dvb_device *dvbdev = file->private_data;
 224         struct dmxdev *dmxdev = dvbdev->priv;
 225         int ret;
 226
 227         if (!dmxdev->demux->write)
 228                 return -EOPNOTSUPP;
 229         if ((file->f_flags & O_ACCMODE) != O_WRONLY)
 230                 return -EINVAL;
 231         if (mutex_lock_interruptible(&dmxdev->mutex))
 232                 return -ERESTARTSYS;
 233
 234         if (dmxdev->exit) {
 235                 mutex_unlock(&dmxdev->mutex);
 236                 return -ENODEV;
 237         }
 238         ret = dmxdev->demux->write(dmxdev->demux, buf, count);
 239         mutex_unlock(&dmxdev->mutex);
 240         return ret;
 241 }
 242
 243 static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
 244                             loff_t *ppos)
 245 {
 246         struct dvb_device *dvbdev = file->private_data;
 247         struct dmxdev *dmxdev = dvbdev->priv;
 248         int ret;
 249
 250         if (dmxdev->exit) {
 251                 mutex_unlock(&dmxdev->mutex);
 252                 return -ENODEV;
 253         }
 254
 255         //mutex_lock(&dmxdev->mutex);
 256         ret = dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
 257                                      file->f_flags & O_NONBLOCK,
 258                                      buf, count, ppos);
 259         //mutex_unlock(&dmxdev->mutex);
 260         return ret;
 261 }
 262
 263 static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
 264                                                *dmxdevfilter, int state)
 265 {
 266         spin_lock_irq(&dmxdevfilter->dev->lock);
 267         dmxdevfilter->state = state;
 268         spin_unlock_irq(&dmxdevfilter->dev->lock);
 269 }
 270
 271 static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
 272                                       unsigned long size)
 273 {
 274         struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
 275         void *mem;
 276
 277         if (buf->size == size)
 278                 return 0;
 279         if (dmxdevfilter->state >= DMXDEV_STATE_GO)
 280                 return -EBUSY;
 281         spin_lock_irq(&dmxdevfilter->dev->lock);
 282         mem = buf->data;
 283         buf->data = NULL;
 284         buf->size = size;
 285         dvb_ringbuffer_flush(buf);
 286         spin_unlock_irq(&dmxdevfilter->dev->lock);
 287         vfree(mem);
 288
 289         if (buf->size) {
 290                 mem = vmalloc(dmxdevfilter->buffer.size);
 291                 if (!mem)
 292                         return -ENOMEM;
 293                 spin_lock_irq(&dmxdevfilter->dev->lock);
 294                 buf->data = mem;
 295                 spin_unlock_irq(&dmxdevfilter->dev->lock);
 296         }
 297         return 0;
 298 }
 299
 300 static void dvb_dmxdev_filter_timeout(unsigned long data)
 301 {
 302         struct dmxdev_filter *dmxdevfilter = (struct dmxdev_filter *)data;
 303
 304         dmxdevfilter->buffer.error = -ETIMEDOUT;
 305         spin_lock_irq(&dmxdevfilter->dev->lock);
 306         dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
 307         spin_unlock_irq(&dmxdevfilter->dev->lock);
 308         wake_up(&dmxdevfilter->buffer.queue);
 309 }
 310
 311 static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
 312 {
 313         struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
 314
 315         del_timer(&dmxdevfilter->timer);
 316         if (para->timeout) {
 317                 dmxdevfilter->timer.function = dvb_dmxdev_filter_timeout;
 318                 dmxdevfilter->timer.data = (unsigned long)dmxdevfilter;
 319                 dmxdevfilter->timer.expires =
 320                     jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
 321                 add_timer(&dmxdevfilter->timer);
 322         }
 323 }
 324
 325 static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
 326                                        const u8 *buffer2, size_t buffer2_len,
 327                                        struct dmx_section_filter *filter,
 328                                        enum dmx_success success)
 329 {
 330         struct dmxdev_filter *dmxdevfilter = filter->priv;
 331         int ret;
 332
 333         if (dmxdevfilter->buffer.error) {
 334                 wake_up(&dmxdevfilter->buffer.queue);
 335                 return 0;
 336         }
 337         spin_lock(&dmxdevfilter->dev->lock);
 338         if (dmxdevfilter->state != DMXDEV_STATE_GO) {
 339                 spin_unlock(&dmxdevfilter->dev->lock);
 340                 return 0;
 341         }
 342         del_timer(&dmxdevfilter->timer);
 343         dprintk("dmxdev: section callback %02x %02x %02x %02x %02x %02x\n",
 344                 buffer1[0], buffer1[1],
 345                 buffer1[2], buffer1[3], buffer1[4], buffer1[5]);
 346         ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1,
 347                                       buffer1_len);
 348         if (ret == buffer1_len) {
 349                 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2,
 350                                               buffer2_len);
 351         }
 352         if (ret < 0) {
 353                 dvb_ringbuffer_flush(&dmxdevfilter->buffer);
 354                 dmxdevfilter->buffer.error = ret;
 355         }
 356         if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
 357                 dmxdevfilter->state = DMXDEV_STATE_DONE;
 358         spin_unlock(&dmxdevfilter->dev->lock);
 359         wake_up(&dmxdevfilter->buffer.queue);
 360         return 0;
 361 }
 362
 363 static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
 364                                   const u8 *buffer2, size_t buffer2_len,
 365                                   struct dmx_ts_feed *feed,
 366                                   enum dmx_success success)
 367 {
 368         struct dmxdev_filter *dmxdevfilter = feed->priv;
 369         struct dvb_ringbuffer *buffer;
 370         int ret;
 371
 372         spin_lock(&dmxdevfilter->dev->lock);
 373         if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
 374                 spin_unlock(&dmxdevfilter->dev->lock);
 375                 return 0;
 376         }
 377
 378         if (dmxdevfilter->params.pes.output == DMX_OUT_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
 625                 if (otype == DMX_OUT_TAP)
 626                         ts_type |= TS_PAYLOAD_ONLY | TS_PACKET;
 627
 628                 ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux,
 629                                                       tsfeed,
 630                                                       dvb_dmxdev_ts_callback);
 631                 if (ret < 0)
 632                         return ret;
 633
 634                 (*tsfeed)->priv = filter;
 635
 636                 ret = (*tsfeed)->set(*tsfeed, para->pid, ts_type, ts_pes,
 637                                      32768, timeout);
 638                 if (ret < 0) {
 639                         dmxdev->demux->release_ts_feed(dmxdev->demux,
 640                                                        *tsfeed);
 641                         return ret;
 642                 }
 643
 644                 ret = filter->feed.ts->start_filtering(filter->feed.ts);
 645                 if (ret < 0) {
 646                         dmxdev->demux->release_ts_feed(dmxdev->demux,
 647                                                        *tsfeed);
 648                         return ret;
 649                 }
 650
 651                 break;
 652         }
 653         default:
 654                 return -EINVAL;
 655         }
 656
 657         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 658         return 0;
 659 }
 660
 661 static int dvb_demux_open(struct inode *inode, struct file *file)
 662 {
 663         struct dvb_device *dvbdev = file->private_data;
 664         struct dmxdev *dmxdev = dvbdev->priv;
 665         int i;
 666         struct dmxdev_filter *dmxdevfilter;
 667
 668         if (!dmxdev->filter)
 669                 return -EINVAL;
 670
 671         if (mutex_lock_interruptible(&dmxdev->mutex))
 672                 return -ERESTARTSYS;
 673
 674         for (i = 0; i < dmxdev->filternum; i++)
 675                 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
 676                         break;
 677
 678         if (i == dmxdev->filternum) {
 679                 mutex_unlock(&dmxdev->mutex);
 680                 return -EMFILE;
 681         }
 682
 683         dmxdevfilter = &dmxdev->filter[i];
 684         mutex_init(&dmxdevfilter->mutex);
 685         file->private_data = dmxdevfilter;
 686
 687         dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);
 688         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 689         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 690         dmxdevfilter->feed.ts = NULL;
 691         init_timer(&dmxdevfilter->timer);
 692
 693         dvbdev->users++;
 694
 695         mutex_unlock(&dmxdev->mutex);
 696         return 0;
 697 }
 698
 699 static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
 700                                   struct dmxdev_filter *dmxdevfilter)
 701 {
 702         mutex_lock(&dmxdev->mutex);
 703         mutex_lock(&dmxdevfilter->mutex);
 704
 705         dvb_dmxdev_filter_stop(dmxdevfilter);
 706         dvb_dmxdev_filter_reset(dmxdevfilter);
 707
 708         if (dmxdevfilter->buffer.data) {
 709                 void *mem = dmxdevfilter->buffer.data;
 710
 711                 spin_lock_irq(&dmxdev->lock);
 712                 dmxdevfilter->buffer.data = NULL;
 713                 spin_unlock_irq(&dmxdev->lock);
 714                 vfree(mem);
 715         }
 716
 717         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
 718         wake_up(&dmxdevfilter->buffer.queue);
 719         mutex_unlock(&dmxdevfilter->mutex);
 720         mutex_unlock(&dmxdev->mutex);
 721         return 0;
 722 }
 723
 724 static inline void invert_mode(dmx_filter_t *filter)
 725 {
 726         int i;
 727
 728         for (i = 0; i < DMX_FILTER_SIZE; i++)
 729                 filter->mode[i] ^= 0xff;
 730 }
 731
 732 static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
 733                                  struct dmxdev_filter *dmxdevfilter,
 734                                  struct dmx_sct_filter_params *params)
 735 {
 736         dprintk("function : %s\n", __FUNCTION__);
 737
 738         dvb_dmxdev_filter_stop(dmxdevfilter);
 739
 740         dmxdevfilter->type = DMXDEV_TYPE_SEC;
 741         memcpy(&dmxdevfilter->params.sec,
 742                params, sizeof(struct dmx_sct_filter_params));
 743         invert_mode(&dmxdevfilter->params.sec.filter);
 744         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 745
 746         if (params->flags & DMX_IMMEDIATE_START)
 747                 return dvb_dmxdev_filter_start(dmxdevfilter);
 748
 749         return 0;
 750 }
 751
 752 static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
 753                                      struct dmxdev_filter *dmxdevfilter,
 754                                      struct dmx_pes_filter_params *params)
 755 {
 756         dvb_dmxdev_filter_stop(dmxdevfilter);
 757
 758         if (params->pes_type > DMX_PES_OTHER || params->pes_type < 0)
 759                 return -EINVAL;
 760
 761         dmxdevfilter->type = DMXDEV_TYPE_PES;
 762         memcpy(&dmxdevfilter->params, params,
 763                sizeof(struct dmx_pes_filter_params));
 764
 765         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 766
 767         if (params->flags & DMX_IMMEDIATE_START)
 768                 return dvb_dmxdev_filter_start(dmxdevfilter);
 769
 770         return 0;
 771 }
 772
 773 static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
 774                                    struct file *file, char __user *buf,
 775                                    size_t count, loff_t *ppos)
 776 {
 777         int result, hcount;
 778         int done = 0;
 779
 780         if (dfil->todo <= 0) {
 781                 hcount = 3 + dfil->todo;
 782                 if (hcount > count)
 783                         hcount = count;
 784                 result = dvb_dmxdev_buffer_read(&dfil->buffer,
 785                                                 file->f_flags & O_NONBLOCK,
 786                                                 buf, hcount, ppos);
 787                 if (result < 0) {
 788                         dfil->todo = 0;
 789                         return result;
 790                 }
 791                 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
 792                         return -EFAULT;
 793                 buf += result;
 794                 done = result;
 795                 count -= result;
 796                 dfil->todo -= result;
 797                 if (dfil->todo > -3)
 798                         return done;
 799                 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
 800                 if (!count)
 801                         return done;
 802         }
 803         if (count > dfil->todo)
 804                 count = dfil->todo;
 805         result = dvb_dmxdev_buffer_read(&dfil->buffer,
 806                                         file->f_flags & O_NONBLOCK,
 807                                         buf, count, ppos);
 808         if (result < 0)
 809                 return result;
 810         dfil->todo -= result;
 811         return (result + done);
 812 }
 813
 814 static ssize_t
 815 dvb_demux_read(struct file *file, char __user *buf, size_t count,
 816                loff_t *ppos)
 817 {
 818         struct dmxdev_filter *dmxdevfilter = file->private_data;
 819         int ret;
 820
 821         if (mutex_lock_interruptible(&dmxdevfilter->mutex))
 822                 return -ERESTARTSYS;
 823
 824         if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
 825                 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
 826         else
 827                 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
 828                                              file->f_flags & O_NONBLOCK,
 829                                              buf, count, ppos);
 830
 831         mutex_unlock(&dmxdevfilter->mutex);
 832         return ret;
 833 }
 834
 835 static int dvb_demux_do_ioctl(struct inode *inode, struct file *file,
 836                               unsigned int cmd, void *parg)
 837 {
 838         struct dmxdev_filter *dmxdevfilter = file->private_data;
 839         struct dmxdev *dmxdev = dmxdevfilter->dev;
 840         unsigned long arg = (unsigned long)parg;
 841         int ret = 0;
 842
 843         if (mutex_lock_interruptible(&dmxdev->mutex))
 844                 return -ERESTARTSYS;
 845
 846         switch (cmd) {
 847         case DMX_START:
 848                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 849                         mutex_unlock(&dmxdev->mutex);
 850                         return -ERESTARTSYS;
 851                 }
 852                 if (dmxdevfilter->state < DMXDEV_STATE_SET)
 853                         ret = -EINVAL;
 854                 else
 855                         ret = dvb_dmxdev_filter_start(dmxdevfilter);
 856                 mutex_unlock(&dmxdevfilter->mutex);
 857                 break;
 858
 859         case DMX_STOP:
 860                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 861                         mutex_unlock(&dmxdev->mutex);
 862                         return -ERESTARTSYS;
 863                 }
 864                 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
 865                 mutex_unlock(&dmxdevfilter->mutex);
 866                 break;
 867
 868         case DMX_SET_FILTER:
 869                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 870                         mutex_unlock(&dmxdev->mutex);
 871                         return -ERESTARTSYS;
 872                 }
 873                 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
 874                 mutex_unlock(&dmxdevfilter->mutex);
 875                 break;
 876
 877         case DMX_SET_PES_FILTER:
 878                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 879                         mutex_unlock(&dmxdev->mutex);
 880                         return -ERESTARTSYS;
 881                 }
 882                 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
 883                 mutex_unlock(&dmxdevfilter->mutex);
 884                 break;
 885
 886         case DMX_SET_BUFFER_SIZE:
 887                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 888                         mutex_unlock(&dmxdev->mutex);
 889                         return -ERESTARTSYS;
 890                 }
 891                 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
 892                 mutex_unlock(&dmxdevfilter->mutex);
 893                 break;
 894
 895         case DMX_GET_PES_PIDS:
 896                 if (!dmxdev->demux->get_pes_pids) {
 897                         ret = -EINVAL;
 898                         break;
 899                 }
 900                 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
 901                 break;
 902
 903         case DMX_GET_CAPS:
 904                 if (!dmxdev->demux->get_caps) {
 905                         ret = -EINVAL;
 906                         break;
 907                 }
 908                 ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
 909                 break;
 910
 911         case DMX_SET_SOURCE:
 912                 if (!dmxdev->demux->set_source) {
 913                         ret = -EINVAL;
 914                         break;
 915                 }
 916                 ret = dmxdev->demux->set_source(dmxdev->demux, parg);
 917                 break;
 918
 919         case DMX_GET_STC:
 920                 if (!dmxdev->demux->get_stc) {
 921                         ret = -EINVAL;
 922                         break;
 923                 }
 924                 ret = dmxdev->demux->get_stc(dmxdev->demux,
 925                                              ((struct dmx_stc *)parg)->num,
 926                                              &((struct dmx_stc *)parg)->stc,
 927                                              &((struct dmx_stc *)parg)->base);
 928                 break;
 929
 930         default:
 931                 ret = -EINVAL;
 932                 break;
 933         }
 934         mutex_unlock(&dmxdev->mutex);
 935         return ret;
 936 }
 937
 938 static int dvb_demux_ioctl(struct inode *inode, struct file *file,
 939                            unsigned int cmd, unsigned long arg)
 940 {
 941         return dvb_usercopy(inode, file, cmd, arg, dvb_demux_do_ioctl);
 942 }
 943
 944 static unsigned int dvb_demux_poll(struct file *file, poll_table *wait)
 945 {
 946         struct dmxdev_filter *dmxdevfilter = file->private_data;
 947         unsigned int mask = 0;
 948
 949         if (!dmxdevfilter)
 950                 return -EINVAL;
 951
 952         poll_wait(file, &dmxdevfilter->buffer.queue, wait);
 953
 954         if (dmxdevfilter->state != DMXDEV_STATE_GO &&
 955             dmxdevfilter->state != DMXDEV_STATE_DONE &&
 956             dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
 957                 return 0;
 958
 959         if (dmxdevfilter->buffer.error)
 960                 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
 961
 962         if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
 963                 mask |= (POLLIN | POLLRDNORM | POLLPRI);
 964
 965         return mask;
 966 }
 967
 968 static int dvb_demux_release(struct inode *inode, struct file *file)
 969 {
 970         struct dmxdev_filter *dmxdevfilter = file->private_data;
 971         struct dmxdev *dmxdev = dmxdevfilter->dev;
 972
 973         int ret;
 974
 975         ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
 976
 977         mutex_lock(&dmxdev->mutex);
 978         dmxdev->dvbdev->users--;
 979         if(dmxdev->dvbdev->users==1 && dmxdev->exit==1) {
 980                 fops_put(file->f_op);
 981                 file->f_op = NULL;
 982                 mutex_unlock(&dmxdev->mutex);
 983                 wake_up(&dmxdev->dvbdev->wait_queue);
 984         } else
 985                 mutex_unlock(&dmxdev->mutex);
 986
 987         return ret;
 988 }
 989
 990 static struct file_operations dvb_demux_fops = {
 991         .owner = THIS_MODULE,
 992         .read = dvb_demux_read,
 993         .ioctl = dvb_demux_ioctl,
 994         .open = dvb_demux_open,
 995         .release = dvb_demux_release,
 996         .poll = dvb_demux_poll,
 997 };
 998
 999 static struct dvb_device dvbdev_demux = {
1000         .priv = NULL,
1001         .users = 1,
1002         .writers = 1,
1003         .fops = &dvb_demux_fops
1004 };
1005
1006 static int dvb_dvr_do_ioctl(struct inode *inode, struct file *file,
1007                             unsigned int cmd, void *parg)
1008 {
1009         struct dvb_device *dvbdev = file->private_data;
1010         struct dmxdev *dmxdev = dvbdev->priv;
1011         int ret;
1012
1013         if (mutex_lock_interruptible(&dmxdev->mutex))
1014                 return -ERESTARTSYS;
1015
1016         switch (cmd) {
1017         case DMX_SET_BUFFER_SIZE:
1018                 // FIXME: implement
1019                 ret = 0;
1020                 break;
1021
1022         default:
1023                 ret = -EINVAL;
1024                 break;
1025         }
1026         mutex_unlock(&dmxdev->mutex);
1027         return ret;
1028 }
1029
1030 static int dvb_dvr_ioctl(struct inode *inode, struct file *file,
1031                          unsigned int cmd, unsigned long arg)
1032 {
1033         return dvb_usercopy(inode, file, cmd, arg, dvb_dvr_do_ioctl);
1034 }
1035
1036 static unsigned int dvb_dvr_poll(struct file *file, poll_table *wait)
1037 {
1038         struct dvb_device *dvbdev = file->private_data;
1039         struct dmxdev *dmxdev = dvbdev->priv;
1040         unsigned int mask = 0;
1041
1042         dprintk("function : %s\n", __FUNCTION__);
1043
1044         poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1045
1046         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1047                 if (dmxdev->dvr_buffer.error)
1048                         mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1049
1050                 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
1051                         mask |= (POLLIN | POLLRDNORM | POLLPRI);
1052         } else
1053                 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1054
1055         return mask;
1056 }
1057
1058 static struct file_operations dvb_dvr_fops = {
1059         .owner = THIS_MODULE,
1060         .read = dvb_dvr_read,
1061         .write = dvb_dvr_write,
1062         .ioctl = dvb_dvr_ioctl,
1063         .open = dvb_dvr_open,
1064         .release = dvb_dvr_release,
1065         .poll = dvb_dvr_poll,
1066 };
1067
1068 static struct dvb_device dvbdev_dvr = {
1069         .priv = NULL,
1070         .readers = 1,
1071         .users = 1,
1072         .fops = &dvb_dvr_fops
1073 };
1074
1075 int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1076 {
1077         int i;
1078
1079         if (dmxdev->demux->open(dmxdev->demux) < 0)
1080                 return -EUSERS;
1081
1082         dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
1083         if (!dmxdev->filter)
1084                 return -ENOMEM;
1085
1086         mutex_init(&dmxdev->mutex);
1087         spin_lock_init(&dmxdev->lock);
1088         for (i = 0; i < dmxdev->filternum; i++) {
1089                 dmxdev->filter[i].dev = dmxdev;
1090                 dmxdev->filter[i].buffer.data = NULL;
1091                 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1092                                             DMXDEV_STATE_FREE);
1093         }
1094
1095         dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1096                             DVB_DEVICE_DEMUX);
1097         dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1098                             dmxdev, DVB_DEVICE_DVR);
1099
1100         dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
1101
1102         return 0;
1103 }
1104
1105 EXPORT_SYMBOL(dvb_dmxdev_init);
1106
1107 void dvb_dmxdev_release(struct dmxdev *dmxdev)
1108 {
1109         dmxdev->exit=1;
1110         if (dmxdev->dvbdev->users > 1) {
1111                 wait_event(dmxdev->dvbdev->wait_queue,
1112                                 dmxdev->dvbdev->users==1);
1113         }
1114         if (dmxdev->dvr_dvbdev->users > 1) {
1115                 wait_event(dmxdev->dvr_dvbdev->wait_queue,
1116                                 dmxdev->dvr_dvbdev->users==1);
1117         }
1118
1119         dvb_unregister_device(dmxdev->dvbdev);
1120         dvb_unregister_device(dmxdev->dvr_dvbdev);
1121
1122         vfree(dmxdev->filter);
1123         dmxdev->filter = NULL;
1124         dmxdev->demux->close(dmxdev->demux);
1125 }
1126
1127 EXPORT_SYMBOL(dvb_dmxdev_release);