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V4L/DVB (3386): Dvb-core: remove dead code
[deliverable/linux.git] / drivers / media / dvb / dvb-core / dmxdev.c
1 /*
2 * dmxdev.c - DVB demultiplexer device
3 *
4 * Copyright (C) 2000 Ralph Metzler <ralph@convergence.de>
5 * & Marcus Metzler <marcus@convergence.de>
6 for convergence integrated media GmbH
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public License
10 * as published by the Free Software Foundation; either version 2.1
11 * of the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 *
22 */
23
24 #include <linux/spinlock.h>
25 #include <linux/slab.h>
26 #include <linux/vmalloc.h>
27 #include <linux/module.h>
28 #include <linux/moduleparam.h>
29 #include <linux/sched.h>
30 #include <linux/poll.h>
31 #include <linux/ioctl.h>
32 #include <linux/wait.h>
33 #include <asm/uaccess.h>
34 #include <asm/system.h>
35
36 #include "dmxdev.h"
37
38 static int debug;
39
40 module_param(debug, int, 0644);
41 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
42
43 #define dprintk if (debug) printk
44
45 static inline void dvb_dmxdev_buffer_init(struct dmxdev_buffer *buffer)
46 {
47 buffer->data=NULL;
48 buffer->size=8192;
49 buffer->pread=0;
50 buffer->pwrite=0;
51 buffer->error=0;
52 init_waitqueue_head(&buffer->queue);
53 }
54
55 static inline int dvb_dmxdev_buffer_write(struct dmxdev_buffer *buf, const u8 *src, int len)
56 {
57 int split;
58 int free;
59 int todo;
60
61 if (!len)
62 return 0;
63 if (!buf->data)
64 return 0;
65
66 free=buf->pread-buf->pwrite;
67 split=0;
68 if (free<=0) {
69 free+=buf->size;
70 split=buf->size-buf->pwrite;
71 }
72 if (len>=free) {
73 dprintk("dmxdev: buffer overflow\n");
74 return -1;
75 }
76 if (split>=len)
77 split=0;
78 todo=len;
79 if (split) {
80 memcpy(buf->data + buf->pwrite, src, split);
81 todo-=split;
82 buf->pwrite=0;
83 }
84 memcpy(buf->data + buf->pwrite, src+split, todo);
85 buf->pwrite=(buf->pwrite+todo)%buf->size;
86 return len;
87 }
88
89 static ssize_t dvb_dmxdev_buffer_read(struct dmxdev_buffer *src,
90 int non_blocking, char __user *buf, size_t count, loff_t *ppos)
91 {
92 unsigned long todo=count;
93 int split, avail, error;
94
95 if (!src->data)
96 return 0;
97
98 if ((error=src->error)) {
99 src->pwrite=src->pread;
100 src->error=0;
101 return error;
102 }
103
104 if (non_blocking && (src->pwrite==src->pread))
105 return -EWOULDBLOCK;
106
107 while (todo>0) {
108 if (non_blocking && (src->pwrite==src->pread))
109 return (count-todo) ? (count-todo) : -EWOULDBLOCK;
110
111 if (wait_event_interruptible(src->queue,
112 (src->pread!=src->pwrite) ||
113 (src->error))<0)
114 return count-todo;
115
116 if ((error=src->error)) {
117 src->pwrite=src->pread;
118 src->error=0;
119 return error;
120 }
121
122 split=src->size;
123 avail=src->pwrite - src->pread;
124 if (avail<0) {
125 avail+=src->size;
126 split=src->size - src->pread;
127 }
128 if (avail>todo)
129 avail=todo;
130 if (split<avail) {
131 if (copy_to_user(buf, src->data+src->pread, split))
132 return -EFAULT;
133 buf+=split;
134 src->pread=0;
135 todo-=split;
136 avail-=split;
137 }
138 if (avail) {
139 if (copy_to_user(buf, src->data+src->pread, avail))
140 return -EFAULT;
141 src->pread = (src->pread + avail) % src->size;
142 todo-=avail;
143 buf+=avail;
144 }
145 }
146 return count;
147 }
148
149 static struct dmx_frontend * get_fe(struct dmx_demux *demux, int type)
150 {
151 struct list_head *head, *pos;
152
153 head=demux->get_frontends(demux);
154 if (!head)
155 return NULL;
156 list_for_each(pos, head)
157 if (DMX_FE_ENTRY(pos)->source==type)
158 return DMX_FE_ENTRY(pos);
159
160 return NULL;
161 }
162
163 static int dvb_dvr_open(struct inode *inode, struct file *file)
164 {
165 struct dvb_device *dvbdev = file->private_data;
166 struct dmxdev *dmxdev = dvbdev->priv;
167 struct dmx_frontend *front;
168
169 dprintk ("function : %s\n", __FUNCTION__);
170
171 if (mutex_lock_interruptible(&dmxdev->mutex))
172 return -ERESTARTSYS;
173
174 if ((file->f_flags&O_ACCMODE)==O_RDWR) {
175 if (!(dmxdev->capabilities&DMXDEV_CAP_DUPLEX)) {
176 mutex_unlock(&dmxdev->mutex);
177 return -EOPNOTSUPP;
178 }
179 }
180
181 if ((file->f_flags&O_ACCMODE)==O_RDONLY) {
182 dvb_dmxdev_buffer_init(&dmxdev->dvr_buffer);
183 dmxdev->dvr_buffer.size=DVR_BUFFER_SIZE;
184 dmxdev->dvr_buffer.data=vmalloc(DVR_BUFFER_SIZE);
185 if (!dmxdev->dvr_buffer.data) {
186 mutex_unlock(&dmxdev->mutex);
187 return -ENOMEM;
188 }
189 }
190
191 if ((file->f_flags&O_ACCMODE)==O_WRONLY) {
192 dmxdev->dvr_orig_fe=dmxdev->demux->frontend;
193
194 if (!dmxdev->demux->write) {
195 mutex_unlock(&dmxdev->mutex);
196 return -EOPNOTSUPP;
197 }
198
199 front=get_fe(dmxdev->demux, DMX_MEMORY_FE);
200
201 if (!front) {
202 mutex_unlock(&dmxdev->mutex);
203 return -EINVAL;
204 }
205 dmxdev->demux->disconnect_frontend(dmxdev->demux);
206 dmxdev->demux->connect_frontend(dmxdev->demux, front);
207 }
208 mutex_unlock(&dmxdev->mutex);
209 return 0;
210 }
211
212 static int dvb_dvr_release(struct inode *inode, struct file *file)
213 {
214 struct dvb_device *dvbdev = file->private_data;
215 struct dmxdev *dmxdev = dvbdev->priv;
216
217 if (mutex_lock_interruptible(&dmxdev->mutex))
218 return -ERESTARTSYS;
219
220 if ((file->f_flags&O_ACCMODE)==O_WRONLY) {
221 dmxdev->demux->disconnect_frontend(dmxdev->demux);
222 dmxdev->demux->connect_frontend(dmxdev->demux,
223 dmxdev->dvr_orig_fe);
224 }
225 if ((file->f_flags&O_ACCMODE)==O_RDONLY) {
226 if (dmxdev->dvr_buffer.data) {
227 void *mem=dmxdev->dvr_buffer.data;
228 mb();
229 spin_lock_irq(&dmxdev->lock);
230 dmxdev->dvr_buffer.data=NULL;
231 spin_unlock_irq(&dmxdev->lock);
232 vfree(mem);
233 }
234 }
235 mutex_unlock(&dmxdev->mutex);
236 return 0;
237 }
238
239 static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
240 size_t count, loff_t *ppos)
241 {
242 struct dvb_device *dvbdev = file->private_data;
243 struct dmxdev *dmxdev = dvbdev->priv;
244 int ret;
245
246 if (!dmxdev->demux->write)
247 return -EOPNOTSUPP;
248 if ((file->f_flags&O_ACCMODE)!=O_WRONLY)
249 return -EINVAL;
250 if (mutex_lock_interruptible(&dmxdev->mutex))
251 return -ERESTARTSYS;
252 ret=dmxdev->demux->write(dmxdev->demux, buf, count);
253 mutex_unlock(&dmxdev->mutex);
254 return ret;
255 }
256
257 static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
258 loff_t *ppos)
259 {
260 struct dvb_device *dvbdev = file->private_data;
261 struct dmxdev *dmxdev = dvbdev->priv;
262 int ret;
263
264 //mutex_lock(&dmxdev->mutex);
265 ret= dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
266 file->f_flags&O_NONBLOCK,
267 buf, count, ppos);
268 //mutex_unlock(&dmxdev->mutex);
269 return ret;
270 }
271
272 static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter *dmxdevfilter, int state)
273 {
274 spin_lock_irq(&dmxdevfilter->dev->lock);
275 dmxdevfilter->state=state;
276 spin_unlock_irq(&dmxdevfilter->dev->lock);
277 }
278
279 static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter, unsigned long size)
280 {
281 struct dmxdev_buffer *buf=&dmxdevfilter->buffer;
282 void *mem;
283
284 if (buf->size==size)
285 return 0;
286 if (dmxdevfilter->state>=DMXDEV_STATE_GO)
287 return -EBUSY;
288 spin_lock_irq(&dmxdevfilter->dev->lock);
289 mem=buf->data;
290 buf->data=NULL;
291 buf->size=size;
292 buf->pwrite=buf->pread=0;
293 spin_unlock_irq(&dmxdevfilter->dev->lock);
294 vfree(mem);
295
296 if (buf->size) {
297 mem=vmalloc(dmxdevfilter->buffer.size);
298 if (!mem)
299 return -ENOMEM;
300 spin_lock_irq(&dmxdevfilter->dev->lock);
301 buf->data=mem;
302 spin_unlock_irq(&dmxdevfilter->dev->lock);
303 }
304 return 0;
305 }
306
307 static void dvb_dmxdev_filter_timeout(unsigned long data)
308 {
309 struct dmxdev_filter *dmxdevfilter=(struct dmxdev_filter *)data;
310
311 dmxdevfilter->buffer.error=-ETIMEDOUT;
312 spin_lock_irq(&dmxdevfilter->dev->lock);
313 dmxdevfilter->state=DMXDEV_STATE_TIMEDOUT;
314 spin_unlock_irq(&dmxdevfilter->dev->lock);
315 wake_up(&dmxdevfilter->buffer.queue);
316 }
317
318 static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
319 {
320 struct dmx_sct_filter_params *para=&dmxdevfilter->params.sec;
321
322 del_timer(&dmxdevfilter->timer);
323 if (para->timeout) {
324 dmxdevfilter->timer.function=dvb_dmxdev_filter_timeout;
325 dmxdevfilter->timer.data=(unsigned long) dmxdevfilter;
326 dmxdevfilter->timer.expires=jiffies+1+(HZ/2+HZ*para->timeout)/1000;
327 add_timer(&dmxdevfilter->timer);
328 }
329 }
330
331 static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
332 const u8 *buffer2, size_t buffer2_len,
333 struct dmx_section_filter *filter, enum dmx_success success)
334 {
335 struct dmxdev_filter *dmxdevfilter = filter->priv;
336 int ret;
337
338 if (dmxdevfilter->buffer.error) {
339 wake_up(&dmxdevfilter->buffer.queue);
340 return 0;
341 }
342 spin_lock(&dmxdevfilter->dev->lock);
343 if (dmxdevfilter->state!=DMXDEV_STATE_GO) {
344 spin_unlock(&dmxdevfilter->dev->lock);
345 return 0;
346 }
347 del_timer(&dmxdevfilter->timer);
348 dprintk("dmxdev: section callback %02x %02x %02x %02x %02x %02x\n",
349 buffer1[0], buffer1[1],
350 buffer1[2], buffer1[3],
351 buffer1[4], buffer1[5]);
352 ret=dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1, buffer1_len);
353 if (ret==buffer1_len) {
354 ret=dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2, buffer2_len);
355 }
356 if (ret<0) {
357 dmxdevfilter->buffer.pwrite=dmxdevfilter->buffer.pread;
358 dmxdevfilter->buffer.error=-EOVERFLOW;
359 }
360 if (dmxdevfilter->params.sec.flags&DMX_ONESHOT)
361 dmxdevfilter->state=DMXDEV_STATE_DONE;
362 spin_unlock(&dmxdevfilter->dev->lock);
363 wake_up(&dmxdevfilter->buffer.queue);
364 return 0;
365 }
366
367 static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
368 const u8 *buffer2, size_t buffer2_len,
369 struct dmx_ts_feed *feed, enum dmx_success success)
370 {
371 struct dmxdev_filter *dmxdevfilter = feed->priv;
372 struct dmxdev_buffer *buffer;
373 int ret;
374
375 spin_lock(&dmxdevfilter->dev->lock);
376 if (dmxdevfilter->params.pes.output==DMX_OUT_DECODER) {
377 spin_unlock(&dmxdevfilter->dev->lock);
378 return 0;
379 }
380
381 if (dmxdevfilter->params.pes.output==DMX_OUT_TAP)
382 buffer=&dmxdevfilter->buffer;
383 else
384 buffer=&dmxdevfilter->dev->dvr_buffer;
385 if (buffer->error) {
386 spin_unlock(&dmxdevfilter->dev->lock);
387 wake_up(&buffer->queue);
388 return 0;
389 }
390 ret=dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
391 if (ret==buffer1_len)
392 ret=dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len);
393 if (ret<0) {
394 buffer->pwrite=buffer->pread;
395 buffer->error=-EOVERFLOW;
396 }
397 spin_unlock(&dmxdevfilter->dev->lock);
398 wake_up(&buffer->queue);
399 return 0;
400 }
401
402
403 /* stop feed but only mark the specified filter as stopped (state set) */
404
405 static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
406 {
407 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
408
409 switch (dmxdevfilter->type) {
410 case DMXDEV_TYPE_SEC:
411 del_timer(&dmxdevfilter->timer);
412 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
413 break;
414 case DMXDEV_TYPE_PES:
415 dmxdevfilter->feed.ts->stop_filtering(dmxdevfilter->feed.ts);
416 break;
417 default:
418 return -EINVAL;
419 }
420 return 0;
421 }
422
423
424 /* start feed associated with the specified filter */
425
426 static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
427 {
428 dvb_dmxdev_filter_state_set (filter, DMXDEV_STATE_GO);
429
430 switch (filter->type) {
431 case DMXDEV_TYPE_SEC:
432 return filter->feed.sec->start_filtering(filter->feed.sec);
433 break;
434 case DMXDEV_TYPE_PES:
435 return filter->feed.ts->start_filtering(filter->feed.ts);
436 break;
437 default:
438 return -EINVAL;
439 }
440
441 return 0;
442 }
443
444
445 /* restart section feed if it has filters left associated with it,
446 otherwise release the feed */
447
448 static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
449 {
450 int i;
451 struct dmxdev *dmxdev = filter->dev;
452 u16 pid = filter->params.sec.pid;
453
454 for (i=0; i<dmxdev->filternum; i++)
455 if (dmxdev->filter[i].state>=DMXDEV_STATE_GO &&
456 dmxdev->filter[i].type==DMXDEV_TYPE_SEC &&
457 dmxdev->filter[i].pid==pid) {
458 dvb_dmxdev_feed_start(&dmxdev->filter[i]);
459 return 0;
460 }
461
462 filter->dev->demux->release_section_feed(dmxdev->demux, filter->feed.sec);
463
464 return 0;
465 }
466
467 static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
468 {
469 if (dmxdevfilter->state<DMXDEV_STATE_GO)
470 return 0;
471
472 switch (dmxdevfilter->type) {
473 case DMXDEV_TYPE_SEC:
474 if (!dmxdevfilter->feed.sec)
475 break;
476 dvb_dmxdev_feed_stop(dmxdevfilter);
477 if (dmxdevfilter->filter.sec)
478 dmxdevfilter->feed.sec->
479 release_filter(dmxdevfilter->feed.sec,
480 dmxdevfilter->filter.sec);
481 dvb_dmxdev_feed_restart(dmxdevfilter);
482 dmxdevfilter->feed.sec=NULL;
483 break;
484 case DMXDEV_TYPE_PES:
485 if (!dmxdevfilter->feed.ts)
486 break;
487 dvb_dmxdev_feed_stop(dmxdevfilter);
488 dmxdevfilter->dev->demux->
489 release_ts_feed(dmxdevfilter->dev->demux,
490 dmxdevfilter->feed.ts);
491 dmxdevfilter->feed.ts=NULL;
492 break;
493 default:
494 if (dmxdevfilter->state==DMXDEV_STATE_ALLOCATED)
495 return 0;
496 return -EINVAL;
497 }
498 dmxdevfilter->buffer.pwrite=dmxdevfilter->buffer.pread=0;
499 return 0;
500 }
501
502 static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
503 {
504 if (dmxdevfilter->state<DMXDEV_STATE_SET)
505 return 0;
506
507 dmxdevfilter->type=DMXDEV_TYPE_NONE;
508 dmxdevfilter->pid=0xffff;
509 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
510 return 0;
511 }
512
513 static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
514 {
515 struct dmxdev *dmxdev = filter->dev;
516 void *mem;
517 int ret, i;
518
519 if (filter->state < DMXDEV_STATE_SET)
520 return -EINVAL;
521
522 if (filter->state >= DMXDEV_STATE_GO)
523 dvb_dmxdev_filter_stop(filter);
524
525 if (!(mem = filter->buffer.data)) {
526 mem = vmalloc(filter->buffer.size);
527 spin_lock_irq(&filter->dev->lock);
528 filter->buffer.data=mem;
529 spin_unlock_irq(&filter->dev->lock);
530 if (!filter->buffer.data)
531 return -ENOMEM;
532 }
533
534 filter->buffer.pwrite = filter->buffer.pread = 0;
535
536 switch (filter->type) {
537 case DMXDEV_TYPE_SEC:
538 {
539 struct dmx_sct_filter_params *para=&filter->params.sec;
540 struct dmx_section_filter **secfilter=&filter->filter.sec;
541 struct dmx_section_feed **secfeed=&filter->feed.sec;
542
543 *secfilter=NULL;
544 *secfeed=NULL;
545
546 /* find active filter/feed with same PID */
547 for (i=0; i<dmxdev->filternum; i++) {
548 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
549 dmxdev->filter[i].pid == para->pid &&
550 dmxdev->filter[i].type == DMXDEV_TYPE_SEC) {
551 *secfeed = dmxdev->filter[i].feed.sec;
552 break;
553 }
554 }
555
556 /* if no feed found, try to allocate new one */
557 if (!*secfeed) {
558 ret=dmxdev->demux->allocate_section_feed(dmxdev->demux,
559 secfeed,
560 dvb_dmxdev_section_callback);
561 if (ret<0) {
562 printk ("DVB (%s): could not alloc feed\n",
563 __FUNCTION__);
564 return ret;
565 }
566
567 ret=(*secfeed)->set(*secfeed, para->pid, 32768,
568 (para->flags & DMX_CHECK_CRC) ? 1 : 0);
569
570 if (ret<0) {
571 printk ("DVB (%s): could not set feed\n",
572 __FUNCTION__);
573 dvb_dmxdev_feed_restart(filter);
574 return ret;
575 }
576 } else {
577 dvb_dmxdev_feed_stop(filter);
578 }
579
580 ret=(*secfeed)->allocate_filter(*secfeed, secfilter);
581
582 if (ret < 0) {
583 dvb_dmxdev_feed_restart(filter);
584 filter->feed.sec->start_filtering(*secfeed);
585 dprintk ("could not get filter\n");
586 return ret;
587 }
588
589 (*secfilter)->priv = filter;
590
591 memcpy(&((*secfilter)->filter_value[3]),
592 &(para->filter.filter[1]), DMX_FILTER_SIZE-1);
593 memcpy(&(*secfilter)->filter_mask[3],
594 &para->filter.mask[1], DMX_FILTER_SIZE-1);
595 memcpy(&(*secfilter)->filter_mode[3],
596 &para->filter.mode[1], DMX_FILTER_SIZE-1);
597
598 (*secfilter)->filter_value[0]=para->filter.filter[0];
599 (*secfilter)->filter_mask[0]=para->filter.mask[0];
600 (*secfilter)->filter_mode[0]=para->filter.mode[0];
601 (*secfilter)->filter_mask[1]=0;
602 (*secfilter)->filter_mask[2]=0;
603
604 filter->todo = 0;
605
606 ret = filter->feed.sec->start_filtering (filter->feed.sec);
607
608 if (ret < 0)
609 return ret;
610
611 dvb_dmxdev_filter_timer(filter);
612 break;
613 }
614
615 case DMXDEV_TYPE_PES:
616 {
617 struct timespec timeout = { 0 };
618 struct dmx_pes_filter_params *para = &filter->params.pes;
619 dmx_output_t otype;
620 int ret;
621 int ts_type;
622 enum dmx_ts_pes ts_pes;
623 struct dmx_ts_feed **tsfeed = &filter->feed.ts;
624
625 filter->feed.ts = NULL;
626 otype=para->output;
627
628 ts_pes=(enum dmx_ts_pes) para->pes_type;
629
630 if (ts_pes<DMX_PES_OTHER)
631 ts_type=TS_DECODER;
632 else
633 ts_type=0;
634
635 if (otype == DMX_OUT_TS_TAP)
636 ts_type |= TS_PACKET;
637
638 if (otype == DMX_OUT_TAP)
639 ts_type |= TS_PAYLOAD_ONLY|TS_PACKET;
640
641 ret=dmxdev->demux->allocate_ts_feed(dmxdev->demux,
642 tsfeed,
643 dvb_dmxdev_ts_callback);
644 if (ret<0)
645 return ret;
646
647 (*tsfeed)->priv = (void *) filter;
648
649 ret = (*tsfeed)->set(*tsfeed, para->pid, ts_type, ts_pes,
650 32768, timeout);
651
652 if (ret < 0) {
653 dmxdev->demux->release_ts_feed(dmxdev->demux, *tsfeed);
654 return ret;
655 }
656
657 ret = filter->feed.ts->start_filtering(filter->feed.ts);
658
659 if (ret < 0) {
660 dmxdev->demux->release_ts_feed(dmxdev->demux, *tsfeed);
661 return ret;
662 }
663
664 break;
665 }
666 default:
667 return -EINVAL;
668 }
669
670 dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
671 return 0;
672 }
673
674 static int dvb_demux_open(struct inode *inode, struct file *file)
675 {
676 struct dvb_device *dvbdev = file->private_data;
677 struct dmxdev *dmxdev = dvbdev->priv;
678 int i;
679 struct dmxdev_filter *dmxdevfilter;
680
681 if (!dmxdev->filter)
682 return -EINVAL;
683
684 if (mutex_lock_interruptible(&dmxdev->mutex))
685 return -ERESTARTSYS;
686
687 for (i=0; i<dmxdev->filternum; i++)
688 if (dmxdev->filter[i].state==DMXDEV_STATE_FREE)
689 break;
690
691 if (i==dmxdev->filternum) {
692 mutex_unlock(&dmxdev->mutex);
693 return -EMFILE;
694 }
695
696 dmxdevfilter=&dmxdev->filter[i];
697 mutex_init(&dmxdevfilter->mutex);
698 dmxdevfilter->dvbdev=dmxdev->dvbdev;
699 file->private_data=dmxdevfilter;
700
701 dvb_dmxdev_buffer_init(&dmxdevfilter->buffer);
702 dmxdevfilter->type=DMXDEV_TYPE_NONE;
703 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
704 dmxdevfilter->feed.ts=NULL;
705 init_timer(&dmxdevfilter->timer);
706
707 mutex_unlock(&dmxdev->mutex);
708 return 0;
709 }
710
711
712 static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev, struct dmxdev_filter *dmxdevfilter)
713 {
714 if (mutex_lock_interruptible(&dmxdev->mutex))
715 return -ERESTARTSYS;
716
717 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
718 mutex_unlock(&dmxdev->mutex);
719 return -ERESTARTSYS;
720 }
721
722 dvb_dmxdev_filter_stop(dmxdevfilter);
723 dvb_dmxdev_filter_reset(dmxdevfilter);
724
725 if (dmxdevfilter->buffer.data) {
726 void *mem=dmxdevfilter->buffer.data;
727
728 spin_lock_irq(&dmxdev->lock);
729 dmxdevfilter->buffer.data=NULL;
730 spin_unlock_irq(&dmxdev->lock);
731 vfree(mem);
732 }
733
734 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
735 wake_up(&dmxdevfilter->buffer.queue);
736 mutex_unlock(&dmxdevfilter->mutex);
737 mutex_unlock(&dmxdev->mutex);
738 return 0;
739 }
740
741 static inline void invert_mode(dmx_filter_t *filter)
742 {
743 int i;
744
745 for (i=0; i<DMX_FILTER_SIZE; i++)
746 filter->mode[i]^=0xff;
747 }
748
749
750 static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
751 struct dmxdev_filter *dmxdevfilter,
752 struct dmx_sct_filter_params *params)
753 {
754 dprintk ("function : %s\n", __FUNCTION__);
755
756 dvb_dmxdev_filter_stop(dmxdevfilter);
757
758 dmxdevfilter->type=DMXDEV_TYPE_SEC;
759 dmxdevfilter->pid=params->pid;
760 memcpy(&dmxdevfilter->params.sec,
761 params, sizeof(struct dmx_sct_filter_params));
762 invert_mode(&dmxdevfilter->params.sec.filter);
763 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
764
765 if (params->flags&DMX_IMMEDIATE_START)
766 return dvb_dmxdev_filter_start(dmxdevfilter);
767
768 return 0;
769 }
770
771 static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
772 struct dmxdev_filter *dmxdevfilter,
773 struct dmx_pes_filter_params *params)
774 {
775 dvb_dmxdev_filter_stop(dmxdevfilter);
776
777 if (params->pes_type>DMX_PES_OTHER || params->pes_type<0)
778 return -EINVAL;
779
780 dmxdevfilter->type=DMXDEV_TYPE_PES;
781 dmxdevfilter->pid=params->pid;
782 memcpy(&dmxdevfilter->params, params, sizeof(struct dmx_pes_filter_params));
783
784 dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
785
786 if (params->flags&DMX_IMMEDIATE_START)
787 return dvb_dmxdev_filter_start(dmxdevfilter);
788
789 return 0;
790 }
791
792 static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
793 struct file *file, char __user *buf, size_t count, loff_t *ppos)
794 {
795 int result, hcount;
796 int done=0;
797
798 if (dfil->todo<=0) {
799 hcount=3+dfil->todo;
800 if (hcount>count)
801 hcount=count;
802 result=dvb_dmxdev_buffer_read(&dfil->buffer, file->f_flags&O_NONBLOCK,
803 buf, hcount, ppos);
804 if (result<0) {
805 dfil->todo=0;
806 return result;
807 }
808 if (copy_from_user(dfil->secheader-dfil->todo, buf, result))
809 return -EFAULT;
810 buf+=result;
811 done=result;
812 count-=result;
813 dfil->todo-=result;
814 if (dfil->todo>-3)
815 return done;
816 dfil->todo=((dfil->secheader[1]<<8)|dfil->secheader[2])&0xfff;
817 if (!count)
818 return done;
819 }
820 if (count>dfil->todo)
821 count=dfil->todo;
822 result=dvb_dmxdev_buffer_read(&dfil->buffer, file->f_flags&O_NONBLOCK,
823 buf, count, ppos);
824 if (result<0)
825 return result;
826 dfil->todo-=result;
827 return (result+done);
828 }
829
830
831 static ssize_t
832 dvb_demux_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
833 {
834 struct dmxdev_filter *dmxdevfilter= file->private_data;
835 int ret=0;
836
837 if (mutex_lock_interruptible(&dmxdevfilter->mutex))
838 return -ERESTARTSYS;
839
840 if (dmxdevfilter->type==DMXDEV_TYPE_SEC)
841 ret=dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
842 else
843 ret=dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
844 file->f_flags&O_NONBLOCK,
845 buf, count, ppos);
846
847 mutex_unlock(&dmxdevfilter->mutex);
848 return ret;
849 }
850
851
852 static int dvb_demux_do_ioctl(struct inode *inode, struct file *file,
853 unsigned int cmd, void *parg)
854 {
855 struct dmxdev_filter *dmxdevfilter = file->private_data;
856 struct dmxdev *dmxdev=dmxdevfilter->dev;
857 unsigned long arg=(unsigned long) parg;
858 int ret=0;
859
860 if (mutex_lock_interruptible(&dmxdev->mutex))
861 return -ERESTARTSYS;
862
863 switch (cmd) {
864 case DMX_START:
865 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
866 mutex_unlock(&dmxdev->mutex);
867 return -ERESTARTSYS;
868 }
869 if (dmxdevfilter->state<DMXDEV_STATE_SET)
870 ret = -EINVAL;
871 else
872 ret = dvb_dmxdev_filter_start(dmxdevfilter);
873 mutex_unlock(&dmxdevfilter->mutex);
874 break;
875
876 case DMX_STOP:
877 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
878 mutex_unlock(&dmxdev->mutex);
879 return -ERESTARTSYS;
880 }
881 ret=dvb_dmxdev_filter_stop(dmxdevfilter);
882 mutex_unlock(&dmxdevfilter->mutex);
883 break;
884
885 case DMX_SET_FILTER:
886 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
887 mutex_unlock(&dmxdev->mutex);
888 return -ERESTARTSYS;
889 }
890 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter,
891 (struct dmx_sct_filter_params *)parg);
892 mutex_unlock(&dmxdevfilter->mutex);
893 break;
894
895 case DMX_SET_PES_FILTER:
896 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
897 mutex_unlock(&dmxdev->mutex);
898 return -ERESTARTSYS;
899 }
900 ret=dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter,
901 (struct dmx_pes_filter_params *)parg);
902 mutex_unlock(&dmxdevfilter->mutex);
903 break;
904
905 case DMX_SET_BUFFER_SIZE:
906 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
907 mutex_unlock(&dmxdev->mutex);
908 return -ERESTARTSYS;
909 }
910 ret=dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
911 mutex_unlock(&dmxdevfilter->mutex);
912 break;
913
914 case DMX_GET_EVENT:
915 break;
916
917 case DMX_GET_PES_PIDS:
918 if (!dmxdev->demux->get_pes_pids) {
919 ret=-EINVAL;
920 break;
921 }
922 dmxdev->demux->get_pes_pids(dmxdev->demux, (u16 *)parg);
923 break;
924
925 case DMX_GET_CAPS:
926 if (!dmxdev->demux->get_caps) {
927 ret = -EINVAL;
928 break;
929 }
930 ret = dmxdev->demux->get_caps(dmxdev->demux, parg);
931 break;
932
933 case DMX_SET_SOURCE:
934 if (!dmxdev->demux->set_source) {
935 ret = -EINVAL;
936 break;
937 }
938 ret = dmxdev->demux->set_source(dmxdev->demux, parg);
939 break;
940
941 case DMX_GET_STC:
942 if (!dmxdev->demux->get_stc) {
943 ret=-EINVAL;
944 break;
945 }
946 ret = dmxdev->demux->get_stc(dmxdev->demux,
947 ((struct dmx_stc *)parg)->num,
948 &((struct dmx_stc *)parg)->stc,
949 &((struct dmx_stc *)parg)->base);
950 break;
951
952 default:
953 ret=-EINVAL;
954 }
955 mutex_unlock(&dmxdev->mutex);
956 return ret;
957 }
958
959 static int dvb_demux_ioctl(struct inode *inode, struct file *file,
960 unsigned int cmd, unsigned long arg)
961 {
962 return dvb_usercopy(inode, file, cmd, arg, dvb_demux_do_ioctl);
963 }
964
965
966 static unsigned int dvb_demux_poll (struct file *file, poll_table *wait)
967 {
968 struct dmxdev_filter *dmxdevfilter = file->private_data;
969 unsigned int mask = 0;
970
971 if (!dmxdevfilter)
972 return -EINVAL;
973
974 poll_wait(file, &dmxdevfilter->buffer.queue, wait);
975
976 if (dmxdevfilter->state != DMXDEV_STATE_GO &&
977 dmxdevfilter->state != DMXDEV_STATE_DONE &&
978 dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
979 return 0;
980
981 if (dmxdevfilter->buffer.error)
982 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
983
984 if (dmxdevfilter->buffer.pread != dmxdevfilter->buffer.pwrite)
985 mask |= (POLLIN | POLLRDNORM | POLLPRI);
986
987 return mask;
988 }
989
990
991 static int dvb_demux_release(struct inode *inode, struct file *file)
992 {
993 struct dmxdev_filter *dmxdevfilter = file->private_data;
994 struct dmxdev *dmxdev = dmxdevfilter->dev;
995
996 return dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
997 }
998
999
1000 static struct file_operations dvb_demux_fops = {
1001 .owner = THIS_MODULE,
1002 .read = dvb_demux_read,
1003 .ioctl = dvb_demux_ioctl,
1004 .open = dvb_demux_open,
1005 .release = dvb_demux_release,
1006 .poll = dvb_demux_poll,
1007 };
1008
1009
1010 static struct dvb_device dvbdev_demux = {
1011 .priv = NULL,
1012 .users = 1,
1013 .writers = 1,
1014 .fops = &dvb_demux_fops
1015 };
1016
1017
1018 static int dvb_dvr_do_ioctl(struct inode *inode, struct file *file,
1019 unsigned int cmd, void *parg)
1020 {
1021 struct dvb_device *dvbdev = file->private_data;
1022 struct dmxdev *dmxdev = dvbdev->priv;
1023
1024 int ret=0;
1025
1026 if (mutex_lock_interruptible(&dmxdev->mutex))
1027 return -ERESTARTSYS;
1028
1029 switch (cmd) {
1030 case DMX_SET_BUFFER_SIZE:
1031 // FIXME: implement
1032 ret=0;
1033 break;
1034
1035 default:
1036 ret=-EINVAL;
1037 }
1038 mutex_unlock(&dmxdev->mutex);
1039 return ret;
1040 }
1041
1042
1043 static int dvb_dvr_ioctl(struct inode *inode, struct file *file,
1044 unsigned int cmd, unsigned long arg)
1045 {
1046 return dvb_usercopy(inode, file, cmd, arg, dvb_dvr_do_ioctl);
1047 }
1048
1049
1050 static unsigned int dvb_dvr_poll (struct file *file, poll_table *wait)
1051 {
1052 struct dvb_device *dvbdev = file->private_data;
1053 struct dmxdev *dmxdev = dvbdev->priv;
1054 unsigned int mask = 0;
1055
1056 dprintk ("function : %s\n", __FUNCTION__);
1057
1058 poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1059
1060 if ((file->f_flags&O_ACCMODE) == O_RDONLY) {
1061 if (dmxdev->dvr_buffer.error)
1062 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1063
1064 if (dmxdev->dvr_buffer.pread!=dmxdev->dvr_buffer.pwrite)
1065 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1066 } else
1067 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1068
1069 return mask;
1070 }
1071
1072
1073 static struct file_operations dvb_dvr_fops = {
1074 .owner = THIS_MODULE,
1075 .read = dvb_dvr_read,
1076 .write = dvb_dvr_write,
1077 .ioctl = dvb_dvr_ioctl,
1078 .open = dvb_dvr_open,
1079 .release = dvb_dvr_release,
1080 .poll = dvb_dvr_poll,
1081 };
1082
1083 static struct dvb_device dvbdev_dvr = {
1084 .priv = NULL,
1085 .users = 1,
1086 .writers = 1,
1087 .fops = &dvb_dvr_fops
1088 };
1089
1090 int
1091 dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1092 {
1093 int i;
1094
1095 if (dmxdev->demux->open(dmxdev->demux) < 0)
1096 return -EUSERS;
1097
1098 dmxdev->filter = vmalloc(dmxdev->filternum*sizeof(struct dmxdev_filter));
1099 if (!dmxdev->filter)
1100 return -ENOMEM;
1101
1102 mutex_init(&dmxdev->mutex);
1103 spin_lock_init(&dmxdev->lock);
1104 for (i=0; i<dmxdev->filternum; i++) {
1105 dmxdev->filter[i].dev=dmxdev;
1106 dmxdev->filter[i].buffer.data=NULL;
1107 dvb_dmxdev_filter_state_set(&dmxdev->filter[i], DMXDEV_STATE_FREE);
1108 }
1109
1110 dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev, DVB_DEVICE_DEMUX);
1111 dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr, dmxdev, DVB_DEVICE_DVR);
1112
1113 dvb_dmxdev_buffer_init(&dmxdev->dvr_buffer);
1114
1115 return 0;
1116 }
1117 EXPORT_SYMBOL(dvb_dmxdev_init);
1118
1119 void
1120 dvb_dmxdev_release(struct dmxdev *dmxdev)
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 EXPORT_SYMBOL(dvb_dmxdev_release);
Linux kernel - Deliverables
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