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