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19
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 dvbdev->adapter->conn = NULL;
245 kfree(dvbdev->adapter->conn_pads);
246 dvbdev->adapter->conn_pads = NULL;
247 }
248#endif
249}
250
251#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
252static int dvb_create_tsout_entity(struct dvb_device *dvbdev,
253 const char *name, int npads)
254{
255 int i, ret = 0;
256
257 dvbdev->tsout_pads = kcalloc(npads, sizeof(*dvbdev->tsout_pads),
258 GFP_KERNEL);
259 if (!dvbdev->tsout_pads)
260 return -ENOMEM;
261
262 dvbdev->tsout_entity = kcalloc(npads, sizeof(*dvbdev->tsout_entity),
263 GFP_KERNEL);
264 if (!dvbdev->tsout_entity)
265 return -ENOMEM;
266
267 dvbdev->tsout_num_entities = npads;
268
269 for (i = 0; i < npads; i++) {
270 struct media_pad *pads = &dvbdev->tsout_pads[i];
271 struct media_entity *entity = &dvbdev->tsout_entity[i];
272
273 entity->name = kasprintf(GFP_KERNEL, "%s #%d", name, i);
274 if (!entity->name)
275 return -ENOMEM;
276
277 entity->function = MEDIA_ENT_F_IO_DTV;
278 pads->flags = MEDIA_PAD_FL_SINK;
279
280 ret = media_entity_pads_init(entity, 1, pads);
281 if (ret < 0)
282 return ret;
283
284 ret = media_device_register_entity(dvbdev->adapter->mdev,
285 entity);
286 if (ret < 0)
287 return ret;
288 }
289 return 0;
290}
291
292#define DEMUX_TSOUT "demux-tsout"
293#define DVR_TSOUT "dvr-tsout"
294
295static int dvb_create_media_entity(struct dvb_device *dvbdev,
296 int type, int demux_sink_pads)
297{
298 int i, ret, npads;
299
300 switch (type) {
301 case DVB_DEVICE_FRONTEND:
302 npads = 2;
303 break;
304 case DVB_DEVICE_DVR:
305 ret = dvb_create_tsout_entity(dvbdev, DVR_TSOUT,
306 demux_sink_pads);
307 return ret;
308 case DVB_DEVICE_DEMUX:
309 npads = 1 + demux_sink_pads;
310 ret = dvb_create_tsout_entity(dvbdev, DEMUX_TSOUT,
311 demux_sink_pads);
312 if (ret < 0)
313 return ret;
314 break;
315 case DVB_DEVICE_CA:
316 npads = 2;
317 break;
318 case DVB_DEVICE_NET:
319
320
321
322
323
324
325
326
327
328 return 0;
329 default:
330 return 0;
331 }
332
333 dvbdev->entity = kzalloc(sizeof(*dvbdev->entity), GFP_KERNEL);
334 if (!dvbdev->entity)
335 return -ENOMEM;
336
337 dvbdev->entity->name = dvbdev->name;
338
339 if (npads) {
340 dvbdev->pads = kcalloc(npads, sizeof(*dvbdev->pads),
341 GFP_KERNEL);
342 if (!dvbdev->pads)
343 return -ENOMEM;
344 }
345
346 switch (type) {
347 case DVB_DEVICE_FRONTEND:
348 dvbdev->entity->function = MEDIA_ENT_F_DTV_DEMOD;
349 dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK;
350 dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE;
351 break;
352 case DVB_DEVICE_DEMUX:
353 dvbdev->entity->function = MEDIA_ENT_F_TS_DEMUX;
354 dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK;
355 for (i = 1; i < npads; i++)
356 dvbdev->pads[i].flags = MEDIA_PAD_FL_SOURCE;
357 break;
358 case DVB_DEVICE_CA:
359 dvbdev->entity->function = MEDIA_ENT_F_DTV_CA;
360 dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK;
361 dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE;
362 break;
363 default:
364
365 kfree(dvbdev->entity);
366 kfree(dvbdev->pads);
367 dvbdev->entity = NULL;
368 dvbdev->pads = NULL;
369 return 0;
370 }
371
372 if (npads) {
373 ret = media_entity_pads_init(dvbdev->entity, npads, dvbdev->pads);
374 if (ret)
375 return ret;
376 }
377 ret = media_device_register_entity(dvbdev->adapter->mdev,
378 dvbdev->entity);
379 if (ret)
380 return ret;
381
382 pr_info("%s: media entity '%s' registered.\n",
383 __func__, dvbdev->entity->name);
384
385 return 0;
386}
387#endif
388
389static int dvb_register_media_device(struct dvb_device *dvbdev,
390 int type, int minor,
391 unsigned demux_sink_pads)
392{
393#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
394 struct media_link *link;
395 u32 intf_type;
396 int ret;
397
398 if (!dvbdev->adapter->mdev)
399 return 0;
400
401 ret = dvb_create_media_entity(dvbdev, type, demux_sink_pads);
402 if (ret)
403 return ret;
404
405 switch (type) {
406 case DVB_DEVICE_FRONTEND:
407 intf_type = MEDIA_INTF_T_DVB_FE;
408 break;
409 case DVB_DEVICE_DEMUX:
410 intf_type = MEDIA_INTF_T_DVB_DEMUX;
411 break;
412 case DVB_DEVICE_DVR:
413 intf_type = MEDIA_INTF_T_DVB_DVR;
414 break;
415 case DVB_DEVICE_CA:
416 intf_type = MEDIA_INTF_T_DVB_CA;
417 break;
418 case DVB_DEVICE_NET:
419 intf_type = MEDIA_INTF_T_DVB_NET;
420 break;
421 default:
422 return 0;
423 }
424
425 dvbdev->intf_devnode = media_devnode_create(dvbdev->adapter->mdev,
426 intf_type, 0,
427 DVB_MAJOR, minor);
428
429 if (!dvbdev->intf_devnode)
430 return -ENOMEM;
431
432
433
434
435
436
437
438
439
440 if (!dvbdev->entity)
441 return 0;
442
443 link = media_create_intf_link(dvbdev->entity,
444 &dvbdev->intf_devnode->intf,
445 MEDIA_LNK_FL_ENABLED |
446 MEDIA_LNK_FL_IMMUTABLE);
447 if (!link)
448 return -ENOMEM;
449#endif
450 return 0;
451}
452
453int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
454 const struct dvb_device *template, void *priv,
455 enum dvb_device_type type, int demux_sink_pads)
456{
457 struct dvb_device *dvbdev;
458 struct file_operations *dvbdevfops;
459 struct device *clsdev;
460 int minor;
461 int id, ret;
462
463 mutex_lock(&dvbdev_register_lock);
464
465 if ((id = dvbdev_get_free_id (adap, type)) < 0){
466 mutex_unlock(&dvbdev_register_lock);
467 *pdvbdev = NULL;
468 pr_err("%s: couldn't find free device id\n", __func__);
469 return -ENFILE;
470 }
471
472 *pdvbdev = dvbdev = kzalloc(sizeof(*dvbdev), GFP_KERNEL);
473
474 if (!dvbdev){
475 mutex_unlock(&dvbdev_register_lock);
476 return -ENOMEM;
477 }
478
479 dvbdevfops = kzalloc(sizeof(struct file_operations), GFP_KERNEL);
480
481 if (!dvbdevfops){
482 kfree (dvbdev);
483 mutex_unlock(&dvbdev_register_lock);
484 return -ENOMEM;
485 }
486
487 memcpy(dvbdev, template, sizeof(struct dvb_device));
488 dvbdev->type = type;
489 dvbdev->id = id;
490 dvbdev->adapter = adap;
491 dvbdev->priv = priv;
492 dvbdev->fops = dvbdevfops;
493 init_waitqueue_head (&dvbdev->wait_queue);
494
495 memcpy(dvbdevfops, template->fops, sizeof(struct file_operations));
496 dvbdevfops->owner = adap->module;
497
498 list_add_tail (&dvbdev->list_head, &adap->device_list);
499
500 down_write(&minor_rwsem);
501#ifdef CONFIG_DVB_DYNAMIC_MINORS
502 for (minor = 0; minor < MAX_DVB_MINORS; minor++)
503 if (dvb_minors[minor] == NULL)
504 break;
505
506 if (minor == MAX_DVB_MINORS) {
507 kfree(dvbdevfops);
508 kfree(dvbdev);
509 up_write(&minor_rwsem);
510 mutex_unlock(&dvbdev_register_lock);
511 return -EINVAL;
512 }
513#else
514 minor = nums2minor(adap->num, type, id);
515#endif
516
517 dvbdev->minor = minor;
518 dvb_minors[minor] = dvbdev;
519 up_write(&minor_rwsem);
520
521 ret = dvb_register_media_device(dvbdev, type, minor, demux_sink_pads);
522 if (ret) {
523 pr_err("%s: dvb_register_media_device failed to create the mediagraph\n",
524 __func__);
525
526 dvb_media_device_free(dvbdev);
527 kfree(dvbdevfops);
528 kfree(dvbdev);
529 mutex_unlock(&dvbdev_register_lock);
530 return ret;
531 }
532
533 mutex_unlock(&dvbdev_register_lock);
534
535 clsdev = device_create(dvb_class, adap->device,
536 MKDEV(DVB_MAJOR, minor),
537 dvbdev, "dvb%d.%s%d", adap->num, dnames[type], id);
538 if (IS_ERR(clsdev)) {
539 pr_err("%s: failed to create device dvb%d.%s%d (%ld)\n",
540 __func__, adap->num, dnames[type], id, PTR_ERR(clsdev));
541 return PTR_ERR(clsdev);
542 }
543 dprintk("DVB: register adapter%d/%s%d @ minor: %i (0x%02x)\n",
544 adap->num, dnames[type], id, minor, minor);
545
546 return 0;
547}
548EXPORT_SYMBOL(dvb_register_device);
549
550
551void dvb_remove_device(struct dvb_device *dvbdev)
552{
553 if (!dvbdev)
554 return;
555
556 down_write(&minor_rwsem);
557 dvb_minors[dvbdev->minor] = NULL;
558 up_write(&minor_rwsem);
559
560 dvb_media_device_free(dvbdev);
561
562 device_destroy(dvb_class, MKDEV(DVB_MAJOR, dvbdev->minor));
563
564 list_del (&dvbdev->list_head);
565}
566EXPORT_SYMBOL(dvb_remove_device);
567
568
569void dvb_free_device(struct dvb_device *dvbdev)
570{
571 if (!dvbdev)
572 return;
573
574 kfree (dvbdev->fops);
575 kfree (dvbdev);
576}
577EXPORT_SYMBOL(dvb_free_device);
578
579
580void dvb_unregister_device(struct dvb_device *dvbdev)
581{
582 dvb_remove_device(dvbdev);
583 dvb_free_device(dvbdev);
584}
585EXPORT_SYMBOL(dvb_unregister_device);
586
587
588#ifdef CONFIG_MEDIA_CONTROLLER_DVB
589
590static int dvb_create_io_intf_links(struct dvb_adapter *adap,
591 struct media_interface *intf,
592 char *name)
593{
594 struct media_device *mdev = adap->mdev;
595 struct media_entity *entity;
596 struct media_link *link;
597
598 media_device_for_each_entity(entity, mdev) {
599 if (entity->function == MEDIA_ENT_F_IO_DTV) {
600 if (strncmp(entity->name, name, strlen(name)))
601 continue;
602 link = media_create_intf_link(entity, intf,
603 MEDIA_LNK_FL_ENABLED |
604 MEDIA_LNK_FL_IMMUTABLE);
605 if (!link)
606 return -ENOMEM;
607 }
608 }
609 return 0;
610}
611
612int dvb_create_media_graph(struct dvb_adapter *adap,
613 bool create_rf_connector)
614{
615 struct media_device *mdev = adap->mdev;
616 struct media_entity *entity, *tuner = NULL, *demod = NULL, *conn;
617 struct media_entity *demux = NULL, *ca = NULL;
618 struct media_link *link;
619 struct media_interface *intf;
620 unsigned demux_pad = 0;
621 unsigned dvr_pad = 0;
622 unsigned ntuner = 0, ndemod = 0;
623 int ret, pad_source, pad_sink;
624 static const char *connector_name = "Television";
625
626 if (!mdev)
627 return 0;
628
629 media_device_for_each_entity(entity, mdev) {
630 switch (entity->function) {
631 case MEDIA_ENT_F_TUNER:
632 tuner = entity;
633 ntuner++;
634 break;
635 case MEDIA_ENT_F_DTV_DEMOD:
636 demod = entity;
637 ndemod++;
638 break;
639 case MEDIA_ENT_F_TS_DEMUX:
640 demux = entity;
641 break;
642 case MEDIA_ENT_F_DTV_CA:
643 ca = entity;
644 break;
645 }
646 }
647
648
649
650
651
652
653
654
655 if (ntuner > 1)
656 tuner = NULL;
657 if (ndemod > 1)
658 demod = NULL;
659
660 if (create_rf_connector) {
661 conn = kzalloc(sizeof(*conn), GFP_KERNEL);
662 if (!conn)
663 return -ENOMEM;
664 adap->conn = conn;
665
666 adap->conn_pads = kzalloc(sizeof(*adap->conn_pads), GFP_KERNEL);
667 if (!adap->conn_pads)
668 return -ENOMEM;
669
670 conn->flags = MEDIA_ENT_FL_CONNECTOR;
671 conn->function = MEDIA_ENT_F_CONN_RF;
672 conn->name = connector_name;
673 adap->conn_pads->flags = MEDIA_PAD_FL_SOURCE;
674
675 ret = media_entity_pads_init(conn, 1, adap->conn_pads);
676 if (ret)
677 return ret;
678
679 ret = media_device_register_entity(mdev, conn);
680 if (ret)
681 return ret;
682
683 if (!ntuner) {
684 ret = media_create_pad_links(mdev,
685 MEDIA_ENT_F_CONN_RF,
686 conn, 0,
687 MEDIA_ENT_F_DTV_DEMOD,
688 demod, 0,
689 MEDIA_LNK_FL_ENABLED,
690 false);
691 } else {
692 pad_sink = media_get_pad_index(tuner, true,
693 PAD_SIGNAL_ANALOG);
694 if (pad_sink < 0)
695 return -EINVAL;
696 ret = media_create_pad_links(mdev,
697 MEDIA_ENT_F_CONN_RF,
698 conn, 0,
699 MEDIA_ENT_F_TUNER,
700 tuner, pad_sink,
701 MEDIA_LNK_FL_ENABLED,
702 false);
703 }
704 if (ret)
705 return ret;
706 }
707
708 if (ntuner && ndemod) {
709 pad_source = media_get_pad_index(tuner, true,
710 PAD_SIGNAL_ANALOG);
711 if (pad_source)
712 return -EINVAL;
713 ret = media_create_pad_links(mdev,
714 MEDIA_ENT_F_TUNER,
715 tuner, pad_source,
716 MEDIA_ENT_F_DTV_DEMOD,
717 demod, 0, MEDIA_LNK_FL_ENABLED,
718 false);
719 if (ret)
720 return ret;
721 }
722
723 if (ndemod && demux) {
724 ret = media_create_pad_links(mdev,
725 MEDIA_ENT_F_DTV_DEMOD,
726 demod, 1,
727 MEDIA_ENT_F_TS_DEMUX,
728 demux, 0, MEDIA_LNK_FL_ENABLED,
729 false);
730 if (ret)
731 return ret;
732 }
733 if (demux && ca) {
734 ret = media_create_pad_link(demux, 1, ca,
735 0, MEDIA_LNK_FL_ENABLED);
736 if (ret)
737 return ret;
738 }
739
740
741 if (demux) {
742 media_device_for_each_entity(entity, mdev) {
743 if (entity->function == MEDIA_ENT_F_IO_DTV) {
744 if (!strncmp(entity->name, DVR_TSOUT,
745 strlen(DVR_TSOUT))) {
746 ret = media_create_pad_link(demux,
747 ++dvr_pad,
748 entity, 0, 0);
749 if (ret)
750 return ret;
751 }
752 if (!strncmp(entity->name, DEMUX_TSOUT,
753 strlen(DEMUX_TSOUT))) {
754 ret = media_create_pad_link(demux,
755 ++demux_pad,
756 entity, 0, 0);
757 if (ret)
758 return ret;
759 }
760 }
761 }
762 }
763
764
765 media_device_for_each_intf(intf, mdev) {
766 if (intf->type == MEDIA_INTF_T_DVB_CA && ca) {
767 link = media_create_intf_link(ca, intf,
768 MEDIA_LNK_FL_ENABLED |
769 MEDIA_LNK_FL_IMMUTABLE);
770 if (!link)
771 return -ENOMEM;
772 }
773
774 if (intf->type == MEDIA_INTF_T_DVB_FE && tuner) {
775 link = media_create_intf_link(tuner, intf,
776 MEDIA_LNK_FL_ENABLED |
777 MEDIA_LNK_FL_IMMUTABLE);
778 if (!link)
779 return -ENOMEM;
780 }
781#if 0
782
783
784
785
786
787 if (intf->type == MEDIA_INTF_T_DVB_DVR && demux) {
788 link = media_create_intf_link(demux, intf,
789 MEDIA_LNK_FL_ENABLED |
790 MEDIA_LNK_FL_IMMUTABLE);
791 if (!link)
792 return -ENOMEM;
793 }
794#endif
795 if (intf->type == MEDIA_INTF_T_DVB_DVR) {
796 ret = dvb_create_io_intf_links(adap, intf, DVR_TSOUT);
797 if (ret)
798 return ret;
799 }
800 if (intf->type == MEDIA_INTF_T_DVB_DEMUX) {
801 ret = dvb_create_io_intf_links(adap, intf, DEMUX_TSOUT);
802 if (ret)
803 return ret;
804 }
805 }
806 return 0;
807}
808EXPORT_SYMBOL_GPL(dvb_create_media_graph);
809#endif
810
811static int dvbdev_check_free_adapter_num(int num)
812{
813 struct list_head *entry;
814 list_for_each(entry, &dvb_adapter_list) {
815 struct dvb_adapter *adap;
816 adap = list_entry(entry, struct dvb_adapter, list_head);
817 if (adap->num == num)
818 return 0;
819 }
820 return 1;
821}
822
823static int dvbdev_get_free_adapter_num (void)
824{
825 int num = 0;
826
827 while (num < DVB_MAX_ADAPTERS) {
828 if (dvbdev_check_free_adapter_num(num))
829 return num;
830 num++;
831 }
832
833 return -ENFILE;
834}
835
836
837int dvb_register_adapter(struct dvb_adapter *adap, const char *name,
838 struct module *module, struct device *device,
839 short *adapter_nums)
840{
841 int i, num;
842
843 mutex_lock(&dvbdev_register_lock);
844
845 for (i = 0; i < DVB_MAX_ADAPTERS; ++i) {
846 num = adapter_nums[i];
847 if (num >= 0 && num < DVB_MAX_ADAPTERS) {
848
849 if (dvbdev_check_free_adapter_num(num))
850 break;
851 } else {
852 num = dvbdev_get_free_adapter_num();
853 break;
854 }
855 num = -1;
856 }
857
858 if (num < 0) {
859 mutex_unlock(&dvbdev_register_lock);
860 return -ENFILE;
861 }
862
863 memset (adap, 0, sizeof(struct dvb_adapter));
864 INIT_LIST_HEAD (&adap->device_list);
865
866 pr_info("DVB: registering new adapter (%s)\n", name);
867
868 adap->num = num;
869 adap->name = name;
870 adap->module = module;
871 adap->device = device;
872 adap->mfe_shared = 0;
873 adap->mfe_dvbdev = NULL;
874 mutex_init (&adap->mfe_lock);
875
876#ifdef CONFIG_MEDIA_CONTROLLER_DVB
877 mutex_init(&adap->mdev_lock);
878#endif
879
880 list_add_tail (&adap->list_head, &dvb_adapter_list);
881
882 mutex_unlock(&dvbdev_register_lock);
883
884 return num;
885}
886EXPORT_SYMBOL(dvb_register_adapter);
887
888
889int dvb_unregister_adapter(struct dvb_adapter *adap)
890{
891 mutex_lock(&dvbdev_register_lock);
892 list_del (&adap->list_head);
893 mutex_unlock(&dvbdev_register_lock);
894 return 0;
895}
896EXPORT_SYMBOL(dvb_unregister_adapter);
897
898
899
900
901
902
903int dvb_usercopy(struct file *file,
904 unsigned int cmd, unsigned long arg,
905 int (*func)(struct file *file,
906 unsigned int cmd, void *arg))
907{
908 char sbuf[128];
909 void *mbuf = NULL;
910 void *parg = NULL;
911 int err = -EINVAL;
912
913
914 switch (_IOC_DIR(cmd)) {
915 case _IOC_NONE:
916
917
918
919
920 parg = (void *) arg;
921 break;
922 case _IOC_READ:
923 case _IOC_WRITE:
924 case (_IOC_WRITE | _IOC_READ):
925 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
926 parg = sbuf;
927 } else {
928
929 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
930 if (NULL == mbuf)
931 return -ENOMEM;
932 parg = mbuf;
933 }
934
935 err = -EFAULT;
936 if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
937 goto out;
938 break;
939 }
940
941
942 if ((err = func(file, cmd, parg)) == -ENOIOCTLCMD)
943 err = -ENOTTY;
944
945 if (err < 0)
946 goto out;
947
948
949 switch (_IOC_DIR(cmd))
950 {
951 case _IOC_READ:
952 case (_IOC_WRITE | _IOC_READ):
953 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
954 err = -EFAULT;
955 break;
956 }
957
958out:
959 kfree(mbuf);
960 return err;
961}
962
963#if IS_ENABLED(CONFIG_I2C)
964struct i2c_client *dvb_module_probe(const char *module_name,
965 const char *name,
966 struct i2c_adapter *adap,
967 unsigned char addr,
968 void *platform_data)
969{
970 struct i2c_client *client;
971 struct i2c_board_info *board_info;
972
973 board_info = kzalloc(sizeof(*board_info), GFP_KERNEL);
974 if (!board_info)
975 return NULL;
976
977 if (name)
978 strscpy(board_info->type, name, I2C_NAME_SIZE);
979 else
980 strscpy(board_info->type, module_name, I2C_NAME_SIZE);
981
982 board_info->addr = addr;
983 board_info->platform_data = platform_data;
984 request_module(module_name);
985 client = i2c_new_device(adap, board_info);
986 if (client == NULL || client->dev.driver == NULL) {
987 kfree(board_info);
988 return NULL;
989 }
990
991 if (!try_module_get(client->dev.driver->owner)) {
992 i2c_unregister_device(client);
993 client = NULL;
994 }
995
996 kfree(board_info);
997 return client;
998}
999EXPORT_SYMBOL_GPL(dvb_module_probe);
1000
1001void dvb_module_release(struct i2c_client *client)
1002{
1003 if (!client)
1004 return;
1005
1006 module_put(client->dev.driver->owner);
1007 i2c_unregister_device(client);
1008}
1009EXPORT_SYMBOL_GPL(dvb_module_release);
1010#endif
1011
1012static int dvb_uevent(struct device *dev, struct kobj_uevent_env *env)
1013{
1014 struct dvb_device *dvbdev = dev_get_drvdata(dev);
1015
1016 add_uevent_var(env, "DVB_ADAPTER_NUM=%d", dvbdev->adapter->num);
1017 add_uevent_var(env, "DVB_DEVICE_TYPE=%s", dnames[dvbdev->type]);
1018 add_uevent_var(env, "DVB_DEVICE_NUM=%d", dvbdev->id);
1019 return 0;
1020}
1021
1022static char *dvb_devnode(struct device *dev, umode_t *mode)
1023{
1024 struct dvb_device *dvbdev = dev_get_drvdata(dev);
1025
1026 return kasprintf(GFP_KERNEL, "dvb/adapter%d/%s%d",
1027 dvbdev->adapter->num, dnames[dvbdev->type], dvbdev->id);
1028}
1029
1030
1031static int __init init_dvbdev(void)
1032{
1033 int retval;
1034 dev_t dev = MKDEV(DVB_MAJOR, 0);
1035
1036 if ((retval = register_chrdev_region(dev, MAX_DVB_MINORS, "DVB")) != 0) {
1037 pr_err("dvb-core: unable to get major %d\n", DVB_MAJOR);
1038 return retval;
1039 }
1040
1041 cdev_init(&dvb_device_cdev, &dvb_device_fops);
1042 if ((retval = cdev_add(&dvb_device_cdev, dev, MAX_DVB_MINORS)) != 0) {
1043 pr_err("dvb-core: unable register character device\n");
1044 goto error;
1045 }
1046
1047 dvb_class = class_create(THIS_MODULE, "dvb");
1048 if (IS_ERR(dvb_class)) {
1049 retval = PTR_ERR(dvb_class);
1050 goto error;
1051 }
1052 dvb_class->dev_uevent = dvb_uevent;
1053 dvb_class->devnode = dvb_devnode;
1054 return 0;
1055
1056error:
1057 cdev_del(&dvb_device_cdev);
1058 unregister_chrdev_region(dev, MAX_DVB_MINORS);
1059 return retval;
1060}
1061
1062
1063static void __exit exit_dvbdev(void)
1064{
1065 class_destroy(dvb_class);
1066 cdev_del(&dvb_device_cdev);
1067 unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS);
1068}
1069
1070subsys_initcall(init_dvbdev);
1071module_exit(exit_dvbdev);
1072
1073MODULE_DESCRIPTION("DVB Core Driver");
1074MODULE_AUTHOR("Marcus Metzler, Ralph Metzler, Holger Waechtler");
1075MODULE_LICENSE("GPL");
1076
