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