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20#define pr_fmt(fmt) "dvbdev: " fmt
21
22#include <linux/types.h>
23#include <linux/errno.h>
24#include <linux/string.h>
25#include <linux/module.h>
26#include <linux/kernel.h>
27#include <linux/i2c.h>
28#include <linux/init.h>
29#include <linux/slab.h>
30#include <linux/device.h>
31#include <linux/fs.h>
32#include <linux/cdev.h>
33#include <linux/mutex.h>
34#include <media/dvbdev.h>
35
36
37#include <media/tuner.h>
38
39static DEFINE_MUTEX(dvbdev_mutex);
40static int dvbdev_debug;
41
42module_param(dvbdev_debug, int, 0644);
43MODULE_PARM_DESC(dvbdev_debug, "Turn on/off device debugging (default:off).");
44
45#define dprintk(fmt, arg...) do { \
46 if (dvbdev_debug) \
47 printk(KERN_DEBUG pr_fmt("%s: " fmt), \
48 __func__, ##arg); \
49} while (0)
50
51static LIST_HEAD(dvb_adapter_list);
52static DEFINE_MUTEX(dvbdev_register_lock);
53
54static const char * const dnames[] = {
55 [DVB_DEVICE_VIDEO] = "video",
56 [DVB_DEVICE_AUDIO] = "audio",
57 [DVB_DEVICE_SEC] = "sec",
58 [DVB_DEVICE_FRONTEND] = "frontend",
59 [DVB_DEVICE_DEMUX] = "demux",
60 [DVB_DEVICE_DVR] = "dvr",
61 [DVB_DEVICE_CA] = "ca",
62 [DVB_DEVICE_NET] = "net",
63 [DVB_DEVICE_OSD] = "osd"
64};
65
66#ifdef CONFIG_DVB_DYNAMIC_MINORS
67#define MAX_DVB_MINORS 256
68#define DVB_MAX_IDS MAX_DVB_MINORS
69#else
70#define DVB_MAX_IDS 4
71
72static const u8 minor_type[] = {
73 [DVB_DEVICE_VIDEO] = 0,
74 [DVB_DEVICE_AUDIO] = 1,
75 [DVB_DEVICE_SEC] = 2,
76 [DVB_DEVICE_FRONTEND] = 3,
77 [DVB_DEVICE_DEMUX] = 4,
78 [DVB_DEVICE_DVR] = 5,
79 [DVB_DEVICE_CA] = 6,
80 [DVB_DEVICE_NET] = 7,
81 [DVB_DEVICE_OSD] = 8,
82};
83
84#define nums2minor(num, type, id) \
85 (((num) << 6) | ((id) << 4) | minor_type[type])
86
87#define MAX_DVB_MINORS (DVB_MAX_ADAPTERS*64)
88#endif
89
90static struct class *dvb_class;
91
92static struct dvb_device *dvb_minors[MAX_DVB_MINORS];
93static DECLARE_RWSEM(minor_rwsem);
94
95static int dvb_device_open(struct inode *inode, struct file *file)
96{
97 struct dvb_device *dvbdev;
98
99 mutex_lock(&dvbdev_mutex);
100 down_read(&minor_rwsem);
101 dvbdev = dvb_minors[iminor(inode)];
102
103 if (dvbdev && dvbdev->fops) {
104 int err = 0;
105 const struct file_operations *new_fops;
106
107 new_fops = fops_get(dvbdev->fops);
108 if (!new_fops)
109 goto fail;
110 file->private_data = dvbdev;
111 replace_fops(file, new_fops);
112 if (file->f_op->open)
113 err = file->f_op->open(inode, file);
114 up_read(&minor_rwsem);
115 mutex_unlock(&dvbdev_mutex);
116 return err;
117 }
118fail:
119 up_read(&minor_rwsem);
120 mutex_unlock(&dvbdev_mutex);
121 return -ENODEV;
122}
123
124
125static const struct file_operations dvb_device_fops =
126{
127 .owner = THIS_MODULE,
128 .open = dvb_device_open,
129 .llseek = noop_llseek,
130};
131
132static struct cdev dvb_device_cdev;
133
134int dvb_generic_open(struct inode *inode, struct file *file)
135{
136 struct dvb_device *dvbdev = file->private_data;
137
138 if (!dvbdev)
139 return -ENODEV;
140
141 if (!dvbdev->users)
142 return -EBUSY;
143
144 if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
145 if (!dvbdev->readers)
146 return -EBUSY;
147 dvbdev->readers--;
148 } else {
149 if (!dvbdev->writers)
150 return -EBUSY;
151 dvbdev->writers--;
152 }
153
154 dvbdev->users--;
155 return 0;
156}
157EXPORT_SYMBOL(dvb_generic_open);
158
159
160int dvb_generic_release(struct inode *inode, struct file *file)
161{
162 struct dvb_device *dvbdev = file->private_data;
163
164 if (!dvbdev)
165 return -ENODEV;
166
167 if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
168 dvbdev->readers++;
169 } else {
170 dvbdev->writers++;
171 }
172
173 dvbdev->users++;
174 return 0;
175}
176EXPORT_SYMBOL(dvb_generic_release);
177
178
179long dvb_generic_ioctl(struct file *file,
180 unsigned int cmd, unsigned long arg)
181{
182 struct dvb_device *dvbdev = file->private_data;
183
184 if (!dvbdev)
185 return -ENODEV;
186
187 if (!dvbdev->kernel_ioctl)
188 return -EINVAL;
189
190 return dvb_usercopy(file, cmd, arg, dvbdev->kernel_ioctl);
191}
192EXPORT_SYMBOL(dvb_generic_ioctl);
193
194
195static int dvbdev_get_free_id (struct dvb_adapter *adap, int type)
196{
197 u32 id = 0;
198
199 while (id < DVB_MAX_IDS) {
200 struct dvb_device *dev;
201 list_for_each_entry(dev, &adap->device_list, list_head)
202 if (dev->type == type && dev->id == id)
203 goto skip;
204 return id;
205skip:
206 id++;
207 }
208 return -ENFILE;
209}
210
211static void dvb_media_device_free(struct dvb_device *dvbdev)
212{
213#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
214 if (dvbdev->entity) {
215 media_device_unregister_entity(dvbdev->entity);
216 kfree(dvbdev->entity);
217 kfree(dvbdev->pads);
218 dvbdev->entity = NULL;
219 dvbdev->pads = NULL;
220 }
221
222 if (dvbdev->tsout_entity) {
223 int i;
224
225 for (i = 0; i < dvbdev->tsout_num_entities; i++) {
226 media_device_unregister_entity(&dvbdev->tsout_entity[i]);
227 kfree(dvbdev->tsout_entity[i].name);
228 }
229 kfree(dvbdev->tsout_entity);
230 kfree(dvbdev->tsout_pads);
231 dvbdev->tsout_entity = NULL;
232 dvbdev->tsout_pads = NULL;
233
234 dvbdev->tsout_num_entities = 0;
235 }
236
237 if (dvbdev->intf_devnode) {
238 media_devnode_remove(dvbdev->intf_devnode);
239 dvbdev->intf_devnode = NULL;
240 }
241
242 if (dvbdev->adapter->conn) {
243 media_device_unregister_entity(dvbdev->adapter->conn);
244 kfree(dvbdev->adapter->conn);
245 dvbdev->adapter->conn = NULL;
246 kfree(dvbdev->adapter->conn_pads);
247 dvbdev->adapter->conn_pads = NULL;
248 }
249#endif
250}
251
252#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
253static int dvb_create_tsout_entity(struct dvb_device *dvbdev,
254 const char *name, int npads)
255{
256 int i, ret = 0;
257
258 dvbdev->tsout_pads = kcalloc(npads, sizeof(*dvbdev->tsout_pads),
259 GFP_KERNEL);
260 if (!dvbdev->tsout_pads)
261 return -ENOMEM;
262
263 dvbdev->tsout_entity = kcalloc(npads, sizeof(*dvbdev->tsout_entity),
264 GFP_KERNEL);
265 if (!dvbdev->tsout_entity)
266 return -ENOMEM;
267
268 dvbdev->tsout_num_entities = npads;
269
270 for (i = 0; i < npads; i++) {
271 struct media_pad *pads = &dvbdev->tsout_pads[i];
272 struct media_entity *entity = &dvbdev->tsout_entity[i];
273
274 entity->name = kasprintf(GFP_KERNEL, "%s #%d", name, i);
275 if (!entity->name)
276 return -ENOMEM;
277
278 entity->function = MEDIA_ENT_F_IO_DTV;
279 pads->flags = MEDIA_PAD_FL_SINK;
280
281 ret = media_entity_pads_init(entity, 1, pads);
282 if (ret < 0)
283 return ret;
284
285 ret = media_device_register_entity(dvbdev->adapter->mdev,
286 entity);
287 if (ret < 0)
288 return ret;
289 }
290 return 0;
291}
292
293#define DEMUX_TSOUT "demux-tsout"
294#define DVR_TSOUT "dvr-tsout"
295
296static int dvb_create_media_entity(struct dvb_device *dvbdev,
297 int type, int demux_sink_pads)
298{
299 int i, ret, npads;
300
301 switch (type) {
302 case DVB_DEVICE_FRONTEND:
303 npads = 2;
304 break;
305 case DVB_DEVICE_DVR:
306 ret = dvb_create_tsout_entity(dvbdev, DVR_TSOUT,
307 demux_sink_pads);
308 return ret;
309 case DVB_DEVICE_DEMUX:
310 npads = 1 + demux_sink_pads;
311 ret = dvb_create_tsout_entity(dvbdev, DEMUX_TSOUT,
312 demux_sink_pads);
313 if (ret < 0)
314 return ret;
315 break;
316 case DVB_DEVICE_CA:
317 npads = 2;
318 break;
319 case DVB_DEVICE_NET:
320
321
322
323
324
325
326
327
328
329 return 0;
330 default:
331 return 0;
332 }
333
334 dvbdev->entity = kzalloc(sizeof(*dvbdev->entity), GFP_KERNEL);
335 if (!dvbdev->entity)
336 return -ENOMEM;
337
338 dvbdev->entity->name = dvbdev->name;
339
340 if (npads) {
341 dvbdev->pads = kcalloc(npads, sizeof(*dvbdev->pads),
342 GFP_KERNEL);
343 if (!dvbdev->pads) {
344 kfree(dvbdev->entity);
345 return -ENOMEM;
346 }
347 }
348
349 switch (type) {
350 case DVB_DEVICE_FRONTEND:
351 dvbdev->entity->function = MEDIA_ENT_F_DTV_DEMOD;
352 dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK;
353 dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE;
354 break;
355 case DVB_DEVICE_DEMUX:
356 dvbdev->entity->function = MEDIA_ENT_F_TS_DEMUX;
357 dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK;
358 for (i = 1; i < npads; i++)
359 dvbdev->pads[i].flags = MEDIA_PAD_FL_SOURCE;
360 break;
361 case DVB_DEVICE_CA:
362 dvbdev->entity->function = MEDIA_ENT_F_DTV_CA;
363 dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK;
364 dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE;
365 break;
366 default:
367
368 kfree(dvbdev->entity);
369 kfree(dvbdev->pads);
370 dvbdev->entity = NULL;
371 dvbdev->pads = NULL;
372 return 0;
373 }
374
375 if (npads) {
376 ret = media_entity_pads_init(dvbdev->entity, npads, dvbdev->pads);
377 if (ret)
378 return ret;
379 }
380 ret = media_device_register_entity(dvbdev->adapter->mdev,
381 dvbdev->entity);
382 if (ret)
383 return ret;
384
385 pr_info("%s: media entity '%s' registered.\n",
386 __func__, dvbdev->entity->name);
387
388 return 0;
389}
390#endif
391
392static int dvb_register_media_device(struct dvb_device *dvbdev,
393 int type, int minor,
394 unsigned demux_sink_pads)
395{
396#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
397 struct media_link *link;
398 u32 intf_type;
399 int ret;
400
401 if (!dvbdev->adapter->mdev)
402 return 0;
403
404 ret = dvb_create_media_entity(dvbdev, type, demux_sink_pads);
405 if (ret)
406 return ret;
407
408 switch (type) {
409 case DVB_DEVICE_FRONTEND:
410 intf_type = MEDIA_INTF_T_DVB_FE;
411 break;
412 case DVB_DEVICE_DEMUX:
413 intf_type = MEDIA_INTF_T_DVB_DEMUX;
414 break;
415 case DVB_DEVICE_DVR:
416 intf_type = MEDIA_INTF_T_DVB_DVR;
417 break;
418 case DVB_DEVICE_CA:
419 intf_type = MEDIA_INTF_T_DVB_CA;
420 break;
421 case DVB_DEVICE_NET:
422 intf_type = MEDIA_INTF_T_DVB_NET;
423 break;
424 default:
425 return 0;
426 }
427
428 dvbdev->intf_devnode = media_devnode_create(dvbdev->adapter->mdev,
429 intf_type, 0,
430 DVB_MAJOR, minor);
431
432 if (!dvbdev->intf_devnode)
433 return -ENOMEM;
434
435
436
437
438
439
440
441
442
443 if (!dvbdev->entity)
444 return 0;
445
446 link = media_create_intf_link(dvbdev->entity,
447 &dvbdev->intf_devnode->intf,
448 MEDIA_LNK_FL_ENABLED |
449 MEDIA_LNK_FL_IMMUTABLE);
450 if (!link)
451 return -ENOMEM;
452#endif
453 return 0;
454}
455
456int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
457 const struct dvb_device *template, void *priv,
458 enum dvb_device_type type, int demux_sink_pads)
459{
460 struct dvb_device *dvbdev;
461 struct file_operations *dvbdevfops;
462 struct device *clsdev;
463 int minor;
464 int id, ret;
465
466 mutex_lock(&dvbdev_register_lock);
467
468 if ((id = dvbdev_get_free_id (adap, type)) < 0){
469 mutex_unlock(&dvbdev_register_lock);
470 *pdvbdev = NULL;
471 pr_err("%s: couldn't find free device id\n", __func__);
472 return -ENFILE;
473 }
474
475 *pdvbdev = dvbdev = kzalloc(sizeof(*dvbdev), GFP_KERNEL);
476
477 if (!dvbdev){
478 mutex_unlock(&dvbdev_register_lock);
479 return -ENOMEM;
480 }
481
482 dvbdevfops = kmemdup(template->fops, sizeof(*dvbdevfops), GFP_KERNEL);
483
484 if (!dvbdevfops){
485 kfree (dvbdev);
486 mutex_unlock(&dvbdev_register_lock);
487 return -ENOMEM;
488 }
489
490 memcpy(dvbdev, template, sizeof(struct dvb_device));
491 dvbdev->type = type;
492 dvbdev->id = id;
493 dvbdev->adapter = adap;
494 dvbdev->priv = priv;
495 dvbdev->fops = dvbdevfops;
496 init_waitqueue_head (&dvbdev->wait_queue);
497
498 dvbdevfops->owner = adap->module;
499
500 list_add_tail (&dvbdev->list_head, &adap->device_list);
501
502 down_write(&minor_rwsem);
503#ifdef CONFIG_DVB_DYNAMIC_MINORS
504 for (minor = 0; minor < MAX_DVB_MINORS; minor++)
505 if (dvb_minors[minor] == NULL)
506 break;
507
508 if (minor == MAX_DVB_MINORS) {
509 list_del (&dvbdev->list_head);
510 kfree(dvbdevfops);
511 kfree(dvbdev);
512 up_write(&minor_rwsem);
513 mutex_unlock(&dvbdev_register_lock);
514 return -EINVAL;
515 }
516#else
517 minor = nums2minor(adap->num, type, id);
518#endif
519
520 dvbdev->minor = minor;
521 dvb_minors[minor] = dvbdev;
522 up_write(&minor_rwsem);
523
524 ret = dvb_register_media_device(dvbdev, type, minor, demux_sink_pads);
525 if (ret) {
526 pr_err("%s: dvb_register_media_device failed to create the mediagraph\n",
527 __func__);
528
529 dvb_media_device_free(dvbdev);
530 list_del (&dvbdev->list_head);
531 kfree(dvbdevfops);
532 kfree(dvbdev);
533 mutex_unlock(&dvbdev_register_lock);
534 return ret;
535 }
536
537 mutex_unlock(&dvbdev_register_lock);
538
539 clsdev = device_create(dvb_class, adap->device,
540 MKDEV(DVB_MAJOR, minor),
541 dvbdev, "dvb%d.%s%d", adap->num, dnames[type], id);
542 if (IS_ERR(clsdev)) {
543 pr_err("%s: failed to create device dvb%d.%s%d (%ld)\n",
544 __func__, adap->num, dnames[type], id, PTR_ERR(clsdev));
545 dvb_media_device_free(dvbdev);
546 list_del (&dvbdev->list_head);
547 kfree(dvbdevfops);
548 kfree(dvbdev);
549 return PTR_ERR(clsdev);
550 }
551 dprintk("DVB: register adapter%d/%s%d @ minor: %i (0x%02x)\n",
552 adap->num, dnames[type], id, minor, minor);
553
554 return 0;
555}
556EXPORT_SYMBOL(dvb_register_device);
557
558
559void dvb_remove_device(struct dvb_device *dvbdev)
560{
561 if (!dvbdev)
562 return;
563
564 down_write(&minor_rwsem);
565 dvb_minors[dvbdev->minor] = NULL;
566 up_write(&minor_rwsem);
567
568 dvb_media_device_free(dvbdev);
569
570 device_destroy(dvb_class, MKDEV(DVB_MAJOR, dvbdev->minor));
571
572 list_del (&dvbdev->list_head);
573}
574EXPORT_SYMBOL(dvb_remove_device);
575
576
577void dvb_free_device(struct dvb_device *dvbdev)
578{
579 if (!dvbdev)
580 return;
581
582 kfree (dvbdev->fops);
583 kfree (dvbdev);
584}
585EXPORT_SYMBOL(dvb_free_device);
586
587
588void dvb_unregister_device(struct dvb_device *dvbdev)
589{
590 dvb_remove_device(dvbdev);
591 dvb_free_device(dvbdev);
592}
593EXPORT_SYMBOL(dvb_unregister_device);
594
595
596#ifdef CONFIG_MEDIA_CONTROLLER_DVB
597
598static int dvb_create_io_intf_links(struct dvb_adapter *adap,
599 struct media_interface *intf,
600 char *name)
601{
602 struct media_device *mdev = adap->mdev;
603 struct media_entity *entity;
604 struct media_link *link;
605
606 media_device_for_each_entity(entity, mdev) {
607 if (entity->function == MEDIA_ENT_F_IO_DTV) {
608 if (strncmp(entity->name, name, strlen(name)))
609 continue;
610 link = media_create_intf_link(entity, intf,
611 MEDIA_LNK_FL_ENABLED |
612 MEDIA_LNK_FL_IMMUTABLE);
613 if (!link)
614 return -ENOMEM;
615 }
616 }
617 return 0;
618}
619
620int dvb_create_media_graph(struct dvb_adapter *adap,
621 bool create_rf_connector)
622{
623 struct media_device *mdev = adap->mdev;
624 struct media_entity *entity, *tuner = NULL, *demod = NULL, *conn;
625 struct media_entity *demux = NULL, *ca = NULL;
626 struct media_link *link;
627 struct media_interface *intf;
628 unsigned demux_pad = 0;
629 unsigned dvr_pad = 0;
630 unsigned ntuner = 0, ndemod = 0;
631 int ret, pad_source, pad_sink;
632 static const char *connector_name = "Television";
633
634 if (!mdev)
635 return 0;
636
637 media_device_for_each_entity(entity, mdev) {
638 switch (entity->function) {
639 case MEDIA_ENT_F_TUNER:
640 tuner = entity;
641 ntuner++;
642 break;
643 case MEDIA_ENT_F_DTV_DEMOD:
644 demod = entity;
645 ndemod++;
646 break;
647 case MEDIA_ENT_F_TS_DEMUX:
648 demux = entity;
649 break;
650 case MEDIA_ENT_F_DTV_CA:
651 ca = entity;
652 break;
653 }
654 }
655
656
657
658
659
660
661
662
663 if (ntuner > 1)
664 tuner = NULL;
665 if (ndemod > 1)
666 demod = NULL;
667
668 if (create_rf_connector) {
669 conn = kzalloc(sizeof(*conn), GFP_KERNEL);
670 if (!conn)
671 return -ENOMEM;
672 adap->conn = conn;
673
674 adap->conn_pads = kzalloc(sizeof(*adap->conn_pads), GFP_KERNEL);
675 if (!adap->conn_pads)
676 return -ENOMEM;
677
678 conn->flags = MEDIA_ENT_FL_CONNECTOR;
679 conn->function = MEDIA_ENT_F_CONN_RF;
680 conn->name = connector_name;
681 adap->conn_pads->flags = MEDIA_PAD_FL_SOURCE;
682
683 ret = media_entity_pads_init(conn, 1, adap->conn_pads);
684 if (ret)
685 return ret;
686
687 ret = media_device_register_entity(mdev, conn);
688 if (ret)
689 return ret;
690
691 if (!ntuner) {
692 ret = media_create_pad_links(mdev,
693 MEDIA_ENT_F_CONN_RF,
694 conn, 0,
695 MEDIA_ENT_F_DTV_DEMOD,
696 demod, 0,
697 MEDIA_LNK_FL_ENABLED,
698 false);
699 } else {
700 pad_sink = media_get_pad_index(tuner, true,
701 PAD_SIGNAL_ANALOG);
702 if (pad_sink < 0)
703 return -EINVAL;
704 ret = media_create_pad_links(mdev,
705 MEDIA_ENT_F_CONN_RF,
706 conn, 0,
707 MEDIA_ENT_F_TUNER,
708 tuner, pad_sink,
709 MEDIA_LNK_FL_ENABLED,
710 false);
711 }
712 if (ret)
713 return ret;
714 }
715
716 if (ntuner && ndemod) {
717
718 pad_source = media_get_pad_index(tuner, false,
719 PAD_SIGNAL_ANALOG);
720 if (pad_source < 0)
721 return -EINVAL;
722 ret = media_create_pad_links(mdev,
723 MEDIA_ENT_F_TUNER,
724 tuner, pad_source,
725 MEDIA_ENT_F_DTV_DEMOD,
726 demod, 0, MEDIA_LNK_FL_ENABLED,
727 false);
728 if (ret)
729 return ret;
730 }
731
732 if (ndemod && demux) {
733 ret = media_create_pad_links(mdev,
734 MEDIA_ENT_F_DTV_DEMOD,
735 demod, 1,
736 MEDIA_ENT_F_TS_DEMUX,
737 demux, 0, MEDIA_LNK_FL_ENABLED,
738 false);
739 if (ret)
740 return ret;
741 }
742 if (demux && ca) {
743 ret = media_create_pad_link(demux, 1, ca,
744 0, MEDIA_LNK_FL_ENABLED);
745 if (ret)
746 return ret;
747 }
748
749
750 if (demux) {
751 media_device_for_each_entity(entity, mdev) {
752 if (entity->function == MEDIA_ENT_F_IO_DTV) {
753 if (!strncmp(entity->name, DVR_TSOUT,
754 strlen(DVR_TSOUT))) {
755 ret = media_create_pad_link(demux,
756 ++dvr_pad,
757 entity, 0, 0);
758 if (ret)
759 return ret;
760 }
761 if (!strncmp(entity->name, DEMUX_TSOUT,
762 strlen(DEMUX_TSOUT))) {
763 ret = media_create_pad_link(demux,
764 ++demux_pad,
765 entity, 0, 0);
766 if (ret)
767 return ret;
768 }
769 }
770 }
771 }
772
773
774 media_device_for_each_intf(intf, mdev) {
775 if (intf->type == MEDIA_INTF_T_DVB_CA && ca) {
776 link = media_create_intf_link(ca, intf,
777 MEDIA_LNK_FL_ENABLED |
778 MEDIA_LNK_FL_IMMUTABLE);
779 if (!link)
780 return -ENOMEM;
781 }
782
783 if (intf->type == MEDIA_INTF_T_DVB_FE && tuner) {
784 link = media_create_intf_link(tuner, intf,
785 MEDIA_LNK_FL_ENABLED |
786 MEDIA_LNK_FL_IMMUTABLE);
787 if (!link)
788 return -ENOMEM;
789 }
790#if 0
791
792
793
794
795
796 if (intf->type == MEDIA_INTF_T_DVB_DVR && demux) {
797 link = media_create_intf_link(demux, intf,
798 MEDIA_LNK_FL_ENABLED |
799 MEDIA_LNK_FL_IMMUTABLE);
800 if (!link)
801 return -ENOMEM;
802 }
803#endif
804 if (intf->type == MEDIA_INTF_T_DVB_DVR) {
805 ret = dvb_create_io_intf_links(adap, intf, DVR_TSOUT);
806 if (ret)
807 return ret;
808 }
809 if (intf->type == MEDIA_INTF_T_DVB_DEMUX) {
810 ret = dvb_create_io_intf_links(adap, intf, DEMUX_TSOUT);
811 if (ret)
812 return ret;
813 }
814 }
815 return 0;
816}
817EXPORT_SYMBOL_GPL(dvb_create_media_graph);
818#endif
819
820static int dvbdev_check_free_adapter_num(int num)
821{
822 struct list_head *entry;
823 list_for_each(entry, &dvb_adapter_list) {
824 struct dvb_adapter *adap;
825 adap = list_entry(entry, struct dvb_adapter, list_head);
826 if (adap->num == num)
827 return 0;
828 }
829 return 1;
830}
831
832static int dvbdev_get_free_adapter_num (void)
833{
834 int num = 0;
835
836 while (num < DVB_MAX_ADAPTERS) {
837 if (dvbdev_check_free_adapter_num(num))
838 return num;
839 num++;
840 }
841
842 return -ENFILE;
843}
844
845
846int dvb_register_adapter(struct dvb_adapter *adap, const char *name,
847 struct module *module, struct device *device,
848 short *adapter_nums)
849{
850 int i, num;
851
852 mutex_lock(&dvbdev_register_lock);
853
854 for (i = 0; i < DVB_MAX_ADAPTERS; ++i) {
855 num = adapter_nums[i];
856 if (num >= 0 && num < DVB_MAX_ADAPTERS) {
857
858 if (dvbdev_check_free_adapter_num(num))
859 break;
860 } else {
861 num = dvbdev_get_free_adapter_num();
862 break;
863 }
864 num = -1;
865 }
866
867 if (num < 0) {
868 mutex_unlock(&dvbdev_register_lock);
869 return -ENFILE;
870 }
871
872 memset (adap, 0, sizeof(struct dvb_adapter));
873 INIT_LIST_HEAD (&adap->device_list);
874
875 pr_info("DVB: registering new adapter (%s)\n", name);
876
877 adap->num = num;
878 adap->name = name;
879 adap->module = module;
880 adap->device = device;
881 adap->mfe_shared = 0;
882 adap->mfe_dvbdev = NULL;
883 mutex_init (&adap->mfe_lock);
884
885#ifdef CONFIG_MEDIA_CONTROLLER_DVB
886 mutex_init(&adap->mdev_lock);
887#endif
888
889 list_add_tail (&adap->list_head, &dvb_adapter_list);
890
891 mutex_unlock(&dvbdev_register_lock);
892
893 return num;
894}
895EXPORT_SYMBOL(dvb_register_adapter);
896
897
898int dvb_unregister_adapter(struct dvb_adapter *adap)
899{
900 mutex_lock(&dvbdev_register_lock);
901 list_del (&adap->list_head);
902 mutex_unlock(&dvbdev_register_lock);
903 return 0;
904}
905EXPORT_SYMBOL(dvb_unregister_adapter);
906
907
908
909
910
911
912int dvb_usercopy(struct file *file,
913 unsigned int cmd, unsigned long arg,
914 int (*func)(struct file *file,
915 unsigned int cmd, void *arg))
916{
917 char sbuf[128];
918 void *mbuf = NULL;
919 void *parg = NULL;
920 int err = -EINVAL;
921
922
923 switch (_IOC_DIR(cmd)) {
924 case _IOC_NONE:
925
926
927
928
929 parg = (void *) arg;
930 break;
931 case _IOC_READ:
932 case _IOC_WRITE:
933 case (_IOC_WRITE | _IOC_READ):
934 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
935 parg = sbuf;
936 } else {
937
938 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
939 if (NULL == mbuf)
940 return -ENOMEM;
941 parg = mbuf;
942 }
943
944 err = -EFAULT;
945 if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
946 goto out;
947 break;
948 }
949
950
951 if ((err = func(file, cmd, parg)) == -ENOIOCTLCMD)
952 err = -ENOTTY;
953
954 if (err < 0)
955 goto out;
956
957
958 switch (_IOC_DIR(cmd))
959 {
960 case _IOC_READ:
961 case (_IOC_WRITE | _IOC_READ):
962 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
963 err = -EFAULT;
964 break;
965 }
966
967out:
968 kfree(mbuf);
969 return err;
970}
971
972#if IS_ENABLED(CONFIG_I2C)
973struct i2c_client *dvb_module_probe(const char *module_name,
974 const char *name,
975 struct i2c_adapter *adap,
976 unsigned char addr,
977 void *platform_data)
978{
979 struct i2c_client *client;
980 struct i2c_board_info *board_info;
981
982 board_info = kzalloc(sizeof(*board_info), GFP_KERNEL);
983 if (!board_info)
984 return NULL;
985
986 if (name)
987 strscpy(board_info->type, name, I2C_NAME_SIZE);
988 else
989 strscpy(board_info->type, module_name, I2C_NAME_SIZE);
990
991 board_info->addr = addr;
992 board_info->platform_data = platform_data;
993 request_module(module_name);
994 client = i2c_new_client_device(adap, board_info);
995 if (!i2c_client_has_driver(client)) {
996 kfree(board_info);
997 return NULL;
998 }
999
1000 if (!try_module_get(client->dev.driver->owner)) {
1001 i2c_unregister_device(client);
1002 client = NULL;
1003 }
1004
1005 kfree(board_info);
1006 return client;
1007}
1008EXPORT_SYMBOL_GPL(dvb_module_probe);
1009
1010void dvb_module_release(struct i2c_client *client)
1011{
1012 if (!client)
1013 return;
1014
1015 module_put(client->dev.driver->owner);
1016 i2c_unregister_device(client);
1017}
1018EXPORT_SYMBOL_GPL(dvb_module_release);
1019#endif
1020
1021static int dvb_uevent(struct device *dev, struct kobj_uevent_env *env)
1022{
1023 struct dvb_device *dvbdev = dev_get_drvdata(dev);
1024
1025 add_uevent_var(env, "DVB_ADAPTER_NUM=%d", dvbdev->adapter->num);
1026 add_uevent_var(env, "DVB_DEVICE_TYPE=%s", dnames[dvbdev->type]);
1027 add_uevent_var(env, "DVB_DEVICE_NUM=%d", dvbdev->id);
1028 return 0;
1029}
1030
1031static char *dvb_devnode(struct device *dev, umode_t *mode)
1032{
1033 struct dvb_device *dvbdev = dev_get_drvdata(dev);
1034
1035 return kasprintf(GFP_KERNEL, "dvb/adapter%d/%s%d",
1036 dvbdev->adapter->num, dnames[dvbdev->type], dvbdev->id);
1037}
1038
1039
1040static int __init init_dvbdev(void)
1041{
1042 int retval;
1043 dev_t dev = MKDEV(DVB_MAJOR, 0);
1044
1045 if ((retval = register_chrdev_region(dev, MAX_DVB_MINORS, "DVB")) != 0) {
1046 pr_err("dvb-core: unable to get major %d\n", DVB_MAJOR);
1047 return retval;
1048 }
1049
1050 cdev_init(&dvb_device_cdev, &dvb_device_fops);
1051 if ((retval = cdev_add(&dvb_device_cdev, dev, MAX_DVB_MINORS)) != 0) {
1052 pr_err("dvb-core: unable register character device\n");
1053 goto error;
1054 }
1055
1056 dvb_class = class_create(THIS_MODULE, "dvb");
1057 if (IS_ERR(dvb_class)) {
1058 retval = PTR_ERR(dvb_class);
1059 goto error;
1060 }
1061 dvb_class->dev_uevent = dvb_uevent;
1062 dvb_class->devnode = dvb_devnode;
1063 return 0;
1064
1065error:
1066 cdev_del(&dvb_device_cdev);
1067 unregister_chrdev_region(dev, MAX_DVB_MINORS);
1068 return retval;
1069}
1070
1071
1072static void __exit exit_dvbdev(void)
1073{
1074 class_destroy(dvb_class);
1075 cdev_del(&dvb_device_cdev);
1076 unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS);
1077}
1078
1079subsys_initcall(init_dvbdev);
1080module_exit(exit_dvbdev);
1081
1082MODULE_DESCRIPTION("DVB Core Driver");
1083MODULE_AUTHOR("Marcus Metzler, Ralph Metzler, Holger Waechtler");
1084MODULE_LICENSE("GPL");
1085
