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