V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files
[linux-2.6.git] / 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);