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16
17#define pr_fmt(fmt) "dvb_ca_en50221: " fmt
18
19#include <linux/errno.h>
20#include <linux/slab.h>
21#include <linux/list.h>
22#include <linux/module.h>
23#include <linux/nospec.h>
24#include <linux/vmalloc.h>
25#include <linux/delay.h>
26#include <linux/spinlock.h>
27#include <linux/sched/signal.h>
28#include <linux/kthread.h>
29
30#include <media/dvb_ca_en50221.h>
31#include <media/dvb_ringbuffer.h>
32
33static int dvb_ca_en50221_debug;
34
35module_param_named(cam_debug, dvb_ca_en50221_debug, int, 0644);
36MODULE_PARM_DESC(cam_debug, "enable verbose debug messages");
37
38#define dprintk(fmt, arg...) do { \
39 if (dvb_ca_en50221_debug) \
40 printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg);\
41} while (0)
42
43#define INIT_TIMEOUT_SECS 10
44
45#define HOST_LINK_BUF_SIZE 0x200
46
47#define RX_BUFFER_SIZE 65535
48
49#define MAX_RX_PACKETS_PER_ITERATION 10
50
51#define CTRLIF_DATA 0
52#define CTRLIF_COMMAND 1
53#define CTRLIF_STATUS 1
54#define CTRLIF_SIZE_LOW 2
55#define CTRLIF_SIZE_HIGH 3
56
57#define CMDREG_HC 1
58#define CMDREG_SW 2
59#define CMDREG_SR 4
60#define CMDREG_RS 8
61#define CMDREG_FRIE 0x40
62#define CMDREG_DAIE 0x80
63#define IRQEN (CMDREG_DAIE)
64
65#define STATUSREG_RE 1
66#define STATUSREG_WE 2
67#define STATUSREG_FR 0x40
68#define STATUSREG_DA 0x80
69
70#define DVB_CA_SLOTSTATE_NONE 0
71#define DVB_CA_SLOTSTATE_UNINITIALISED 1
72#define DVB_CA_SLOTSTATE_RUNNING 2
73#define DVB_CA_SLOTSTATE_INVALID 3
74#define DVB_CA_SLOTSTATE_WAITREADY 4
75#define DVB_CA_SLOTSTATE_VALIDATE 5
76#define DVB_CA_SLOTSTATE_WAITFR 6
77#define DVB_CA_SLOTSTATE_LINKINIT 7
78
79
80struct dvb_ca_slot {
81
82 int slot_state;
83
84
85 struct mutex slot_lock;
86
87
88 atomic_t camchange_count;
89
90
91 int camchange_type;
92
93
94 u32 config_base;
95
96
97 u8 config_option;
98
99
100 u8 da_irq_supported:1;
101
102
103 int link_buf_size;
104
105
106 struct dvb_ringbuffer rx_buffer;
107
108
109 unsigned long timeout;
110};
111
112
113struct dvb_ca_private {
114 struct kref refcount;
115
116
117 struct dvb_ca_en50221 *pub;
118
119
120 struct dvb_device *dvbdev;
121
122
123 u32 flags;
124
125
126 unsigned int slot_count;
127
128
129 struct dvb_ca_slot *slot_info;
130
131
132 wait_queue_head_t wait_queue;
133
134
135 struct task_struct *thread;
136
137
138 unsigned int open:1;
139
140
141 unsigned int wakeup:1;
142
143
144 unsigned long delay;
145
146
147
148
149
150 int next_read_slot;
151
152
153 struct mutex ioctl_mutex;
154};
155
156static void dvb_ca_private_free(struct dvb_ca_private *ca)
157{
158 unsigned int i;
159
160 dvb_free_device(ca->dvbdev);
161 for (i = 0; i < ca->slot_count; i++)
162 vfree(ca->slot_info[i].rx_buffer.data);
163
164 kfree(ca->slot_info);
165 kfree(ca);
166}
167
168static void dvb_ca_private_release(struct kref *ref)
169{
170 struct dvb_ca_private *ca;
171
172 ca = container_of(ref, struct dvb_ca_private, refcount);
173 dvb_ca_private_free(ca);
174}
175
176static void dvb_ca_private_get(struct dvb_ca_private *ca)
177{
178 kref_get(&ca->refcount);
179}
180
181static void dvb_ca_private_put(struct dvb_ca_private *ca)
182{
183 kref_put(&ca->refcount, dvb_ca_private_release);
184}
185
186static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca);
187static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot,
188 u8 *ebuf, int ecount);
189static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot,
190 u8 *ebuf, int ecount);
191
192
193
194
195
196
197
198
199
200
201static char *findstr(char *haystack, int hlen, char *needle, int nlen)
202{
203 int i;
204
205 if (hlen < nlen)
206 return NULL;
207
208 for (i = 0; i <= hlen - nlen; i++) {
209 if (!strncmp(haystack + i, needle, nlen))
210 return haystack + i;
211 }
212
213 return NULL;
214}
215
216
217
218
219
220
221
222static int dvb_ca_en50221_check_camstatus(struct dvb_ca_private *ca, int slot)
223{
224 struct dvb_ca_slot *sl = &ca->slot_info[slot];
225 int slot_status;
226 int cam_present_now;
227 int cam_changed;
228
229
230 if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)
231 return (atomic_read(&sl->camchange_count) != 0);
232
233
234 slot_status = ca->pub->poll_slot_status(ca->pub, slot, ca->open);
235
236 cam_present_now = (slot_status & DVB_CA_EN50221_POLL_CAM_PRESENT) ? 1 : 0;
237 cam_changed = (slot_status & DVB_CA_EN50221_POLL_CAM_CHANGED) ? 1 : 0;
238 if (!cam_changed) {
239 int cam_present_old = (sl->slot_state != DVB_CA_SLOTSTATE_NONE);
240
241 cam_changed = (cam_present_now != cam_present_old);
242 }
243
244 if (cam_changed) {
245 if (!cam_present_now)
246 sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED;
247 else
248 sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_INSERTED;
249 atomic_set(&sl->camchange_count, 1);
250 } else {
251 if ((sl->slot_state == DVB_CA_SLOTSTATE_WAITREADY) &&
252 (slot_status & DVB_CA_EN50221_POLL_CAM_READY)) {
253
254 sl->slot_state = DVB_CA_SLOTSTATE_VALIDATE;
255 }
256 }
257
258 return cam_changed;
259}
260
261
262
263
264
265
266
267
268
269
270
271
272static int dvb_ca_en50221_wait_if_status(struct dvb_ca_private *ca, int slot,
273 u8 waitfor, int timeout_hz)
274{
275 unsigned long timeout;
276 unsigned long start;
277
278 dprintk("%s\n", __func__);
279
280
281 start = jiffies;
282 timeout = jiffies + timeout_hz;
283 while (1) {
284 int res;
285
286
287 res = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS);
288 if (res < 0)
289 return -EIO;
290
291
292 if (res & waitfor) {
293 dprintk("%s succeeded timeout:%lu\n",
294 __func__, jiffies - start);
295 return 0;
296 }
297
298
299 if (time_after(jiffies, timeout))
300 break;
301
302
303 usleep_range(1000, 1100);
304 }
305
306 dprintk("%s failed timeout:%lu\n", __func__, jiffies - start);
307
308
309 return -ETIMEDOUT;
310}
311
312
313
314
315
316
317
318
319
320static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot)
321{
322 struct dvb_ca_slot *sl = &ca->slot_info[slot];
323 int ret;
324 int buf_size;
325 u8 buf[2];
326
327 dprintk("%s\n", __func__);
328
329
330 sl->da_irq_supported = 0;
331
332
333
334
335
336 sl->link_buf_size = 2;
337
338
339 ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND,
340 IRQEN | CMDREG_SR);
341 if (ret)
342 return ret;
343 ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ);
344 if (ret)
345 return ret;
346 ret = dvb_ca_en50221_read_data(ca, slot, buf, 2);
347 if (ret != 2)
348 return -EIO;
349 ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN);
350 if (ret)
351 return ret;
352
353
354
355
356
357 buf_size = (buf[0] << 8) | buf[1];
358 if (buf_size > HOST_LINK_BUF_SIZE)
359 buf_size = HOST_LINK_BUF_SIZE;
360 sl->link_buf_size = buf_size;
361 buf[0] = buf_size >> 8;
362 buf[1] = buf_size & 0xff;
363 dprintk("Chosen link buffer size of %i\n", buf_size);
364
365
366 ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND,
367 IRQEN | CMDREG_SW);
368 if (ret)
369 return ret;
370 ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10);
371 if (ret)
372 return ret;
373 ret = dvb_ca_en50221_write_data(ca, slot, buf, 2);
374 if (ret != 2)
375 return -EIO;
376 ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN);
377 if (ret)
378 return ret;
379
380
381 return 0;
382}
383
384
385
386
387
388
389
390
391
392
393
394
395
396static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot,
397 int *address, int *tuple_type,
398 int *tuple_length, u8 *tuple)
399{
400 int i;
401 int _tuple_type;
402 int _tuple_length;
403 int _address = *address;
404
405
406 _tuple_type = ca->pub->read_attribute_mem(ca->pub, slot, _address);
407 if (_tuple_type < 0)
408 return _tuple_type;
409 if (_tuple_type == 0xff) {
410 dprintk("END OF CHAIN TUPLE type:0x%x\n", _tuple_type);
411 *address += 2;
412 *tuple_type = _tuple_type;
413 *tuple_length = 0;
414 return 0;
415 }
416 _tuple_length = ca->pub->read_attribute_mem(ca->pub, slot,
417 _address + 2);
418 if (_tuple_length < 0)
419 return _tuple_length;
420 _address += 4;
421
422 dprintk("TUPLE type:0x%x length:%i\n", _tuple_type, _tuple_length);
423
424
425 for (i = 0; i < _tuple_length; i++) {
426 tuple[i] = ca->pub->read_attribute_mem(ca->pub, slot,
427 _address + (i * 2));
428 dprintk(" 0x%02x: 0x%02x %c\n",
429 i, tuple[i] & 0xff,
430 ((tuple[i] > 31) && (tuple[i] < 127)) ? tuple[i] : '.');
431 }
432 _address += (_tuple_length * 2);
433
434
435 *tuple_type = _tuple_type;
436 *tuple_length = _tuple_length;
437 *address = _address;
438 return 0;
439}
440
441
442
443
444
445
446
447
448
449
450static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot)
451{
452 struct dvb_ca_slot *sl;
453 int address = 0;
454 int tuple_length;
455 int tuple_type;
456 u8 tuple[257];
457 char *dvb_str;
458 int rasz;
459 int status;
460 int got_cftableentry = 0;
461 int end_chain = 0;
462 int i;
463 u16 manfid = 0;
464 u16 devid = 0;
465
466
467 status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type,
468 &tuple_length, tuple);
469 if (status < 0)
470 return status;
471 if (tuple_type != 0x1D)
472 return -EINVAL;
473
474
475 status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type,
476 &tuple_length, tuple);
477 if (status < 0)
478 return status;
479 if (tuple_type != 0x1C)
480 return -EINVAL;
481
482
483 status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type,
484 &tuple_length, tuple);
485 if (status < 0)
486 return status;
487 if (tuple_type != 0x15)
488 return -EINVAL;
489
490
491 status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type,
492 &tuple_length, tuple);
493 if (status < 0)
494 return status;
495 if (tuple_type != 0x20)
496 return -EINVAL;
497 if (tuple_length != 4)
498 return -EINVAL;
499 manfid = (tuple[1] << 8) | tuple[0];
500 devid = (tuple[3] << 8) | tuple[2];
501
502
503 status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type,
504 &tuple_length, tuple);
505 if (status < 0)
506 return status;
507 if (tuple_type != 0x1A)
508 return -EINVAL;
509 if (tuple_length < 3)
510 return -EINVAL;
511
512
513 rasz = tuple[0] & 3;
514 if (tuple_length < (3 + rasz + 14))
515 return -EINVAL;
516 sl = &ca->slot_info[slot];
517 sl->config_base = 0;
518 for (i = 0; i < rasz + 1; i++)
519 sl->config_base |= (tuple[2 + i] << (8 * i));
520
521
522 dvb_str = findstr((char *)tuple, tuple_length, "DVB_CI_V", 8);
523 if (!dvb_str)
524 return -EINVAL;
525 if (tuple_length < ((dvb_str - (char *)tuple) + 12))
526 return -EINVAL;
527
528
529 if (strncmp(dvb_str + 8, "1.00", 4)) {
530 pr_err("dvb_ca adapter %d: Unsupported DVB CAM module version %c%c%c%c\n",
531 ca->dvbdev->adapter->num, dvb_str[8], dvb_str[9],
532 dvb_str[10], dvb_str[11]);
533 return -EINVAL;
534 }
535
536
537 while ((!end_chain) && (address < 0x1000)) {
538 status = dvb_ca_en50221_read_tuple(ca, slot, &address,
539 &tuple_type, &tuple_length,
540 tuple);
541 if (status < 0)
542 return status;
543 switch (tuple_type) {
544 case 0x1B:
545 if (tuple_length < (2 + 11 + 17))
546 break;
547
548
549 if (got_cftableentry)
550 break;
551
552
553 sl->config_option = tuple[0] & 0x3f;
554
555
556 if (!findstr((char *)tuple, tuple_length,
557 "DVB_HOST", 8) ||
558 !findstr((char *)tuple, tuple_length,
559 "DVB_CI_MODULE", 13))
560 break;
561
562 got_cftableentry = 1;
563 break;
564
565 case 0x14:
566 break;
567
568 case 0xFF:
569 end_chain = 1;
570 break;
571
572 default:
573 dprintk("dvb_ca: Skipping unknown tuple type:0x%x length:0x%x\n",
574 tuple_type, tuple_length);
575 break;
576 }
577 }
578
579 if ((address > 0x1000) || (!got_cftableentry))
580 return -EINVAL;
581
582 dprintk("Valid DVB CAM detected MANID:%x DEVID:%x CONFIGBASE:0x%x CONFIGOPTION:0x%x\n",
583 manfid, devid, sl->config_base, sl->config_option);
584
585
586 return 0;
587}
588
589
590
591
592
593
594
595static int dvb_ca_en50221_set_configoption(struct dvb_ca_private *ca, int slot)
596{
597 struct dvb_ca_slot *sl = &ca->slot_info[slot];
598 int configoption;
599
600 dprintk("%s\n", __func__);
601
602
603 ca->pub->write_attribute_mem(ca->pub, slot, sl->config_base,
604 sl->config_option);
605
606
607 configoption = ca->pub->read_attribute_mem(ca->pub, slot,
608 sl->config_base);
609 dprintk("Set configoption 0x%x, read configoption 0x%x\n",
610 sl->config_option, configoption & 0x3f);
611
612
613 return 0;
614}
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot,
632 u8 *ebuf, int ecount)
633{
634 struct dvb_ca_slot *sl = &ca->slot_info[slot];
635 int bytes_read;
636 int status;
637 u8 buf[HOST_LINK_BUF_SIZE];
638 int i;
639
640 dprintk("%s\n", __func__);
641
642
643 if (!ebuf) {
644 int buf_free;
645
646 if (!sl->rx_buffer.data) {
647 status = -EIO;
648 goto exit;
649 }
650 buf_free = dvb_ringbuffer_free(&sl->rx_buffer);
651
652 if (buf_free < (sl->link_buf_size +
653 DVB_RINGBUFFER_PKTHDRSIZE)) {
654 status = -EAGAIN;
655 goto exit;
656 }
657 }
658
659 if (ca->pub->read_data &&
660 (sl->slot_state != DVB_CA_SLOTSTATE_LINKINIT)) {
661 if (!ebuf)
662 status = ca->pub->read_data(ca->pub, slot, buf,
663 sizeof(buf));
664 else
665 status = ca->pub->read_data(ca->pub, slot, buf, ecount);
666 if (status < 0)
667 return status;
668 bytes_read = status;
669 if (status == 0)
670 goto exit;
671 } else {
672
673 status = ca->pub->read_cam_control(ca->pub, slot,
674 CTRLIF_STATUS);
675 if (status < 0)
676 goto exit;
677 if (!(status & STATUSREG_DA)) {
678
679 status = 0;
680 goto exit;
681 }
682
683
684 status = ca->pub->read_cam_control(ca->pub, slot,
685 CTRLIF_SIZE_HIGH);
686 if (status < 0)
687 goto exit;
688 bytes_read = status << 8;
689 status = ca->pub->read_cam_control(ca->pub, slot,
690 CTRLIF_SIZE_LOW);
691 if (status < 0)
692 goto exit;
693 bytes_read |= status;
694
695
696 if (!ebuf) {
697 if (bytes_read > sl->link_buf_size) {
698 pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the link buffer size (%i > %i)!\n",
699 ca->dvbdev->adapter->num, bytes_read,
700 sl->link_buf_size);
701 sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT;
702 status = -EIO;
703 goto exit;
704 }
705 if (bytes_read < 2) {
706 pr_err("dvb_ca adapter %d: CAM sent a buffer that was less than 2 bytes!\n",
707 ca->dvbdev->adapter->num);
708 sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT;
709 status = -EIO;
710 goto exit;
711 }
712 } else {
713 if (bytes_read > ecount) {
714 pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the ecount size!\n",
715 ca->dvbdev->adapter->num);
716 status = -EIO;
717 goto exit;
718 }
719 }
720
721
722 for (i = 0; i < bytes_read; i++) {
723
724 status = ca->pub->read_cam_control(ca->pub, slot,
725 CTRLIF_DATA);
726 if (status < 0)
727 goto exit;
728
729
730 buf[i] = status;
731 }
732
733
734 status = ca->pub->read_cam_control(ca->pub, slot,
735 CTRLIF_STATUS);
736 if (status < 0)
737 goto exit;
738 if (status & STATUSREG_RE) {
739 sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT;
740 status = -EIO;
741 goto exit;
742 }
743 }
744
745
746
747
748
749 if (!ebuf) {
750 if (!sl->rx_buffer.data) {
751 status = -EIO;
752 goto exit;
753 }
754 dvb_ringbuffer_pkt_write(&sl->rx_buffer, buf, bytes_read);
755 } else {
756 memcpy(ebuf, buf, bytes_read);
757 }
758
759 dprintk("Received CA packet for slot %i connection id 0x%x last_frag:%i size:0x%x\n", slot,
760 buf[0], (buf[1] & 0x80) == 0, bytes_read);
761
762
763 if ((buf[1] & 0x80) == 0x00)
764 wake_up_interruptible(&ca->wait_queue);
765
766 status = bytes_read;
767
768exit:
769 return status;
770}
771
772
773
774
775
776
777
778
779
780
781
782
783
784static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot,
785 u8 *buf, int bytes_write)
786{
787 struct dvb_ca_slot *sl = &ca->slot_info[slot];
788 int status;
789 int i;
790
791 dprintk("%s\n", __func__);
792
793
794 if (bytes_write > sl->link_buf_size)
795 return -EINVAL;
796
797 if (ca->pub->write_data &&
798 (sl->slot_state != DVB_CA_SLOTSTATE_LINKINIT))
799 return ca->pub->write_data(ca->pub, slot, buf, bytes_write);
800
801
802
803
804
805
806
807 status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS);
808 if (status < 0)
809 goto exitnowrite;
810 if (status & (STATUSREG_DA | STATUSREG_RE)) {
811 if (status & STATUSREG_DA)
812 dvb_ca_en50221_thread_wakeup(ca);
813
814 status = -EAGAIN;
815 goto exitnowrite;
816 }
817
818
819 status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND,
820 IRQEN | CMDREG_HC);
821 if (status)
822 goto exit;
823
824
825 status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS);
826 if (status < 0)
827 goto exit;
828 if (!(status & STATUSREG_FR)) {
829
830 status = -EAGAIN;
831 goto exit;
832 }
833
834
835
836
837
838
839
840
841
842
843
844
845 status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS);
846 if (status < 0)
847 goto exit;
848
849 if (status & (STATUSREG_DA | STATUSREG_RE)) {
850 if (status & STATUSREG_DA)
851 dvb_ca_en50221_thread_wakeup(ca);
852
853 status = -EAGAIN;
854 goto exit;
855 }
856
857
858 status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH,
859 bytes_write >> 8);
860 if (status)
861 goto exit;
862 status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW,
863 bytes_write & 0xff);
864 if (status)
865 goto exit;
866
867
868 for (i = 0; i < bytes_write; i++) {
869 status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_DATA,
870 buf[i]);
871 if (status)
872 goto exit;
873 }
874
875
876 status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS);
877 if (status < 0)
878 goto exit;
879 if (status & STATUSREG_WE) {
880 sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT;
881 status = -EIO;
882 goto exit;
883 }
884 status = bytes_write;
885
886 dprintk("Wrote CA packet for slot %i, connection id 0x%x last_frag:%i size:0x%x\n", slot,
887 buf[0], (buf[1] & 0x80) == 0, bytes_write);
888
889exit:
890 ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN);
891
892exitnowrite:
893 return status;
894}
895
896
897
898
899
900
901
902
903
904
905static int dvb_ca_en50221_slot_shutdown(struct dvb_ca_private *ca, int slot)
906{
907 dprintk("%s\n", __func__);
908
909 ca->pub->slot_shutdown(ca->pub, slot);
910 ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE;
911
912
913
914
915
916 wake_up_interruptible(&ca->wait_queue);
917
918 dprintk("Slot %i shutdown\n", slot);
919
920
921 return 0;
922}
923
924
925
926
927
928
929
930
931void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot,
932 int change_type)
933{
934 struct dvb_ca_private *ca = pubca->private;
935 struct dvb_ca_slot *sl = &ca->slot_info[slot];
936
937 dprintk("CAMCHANGE IRQ slot:%i change_type:%i\n", slot, change_type);
938
939 switch (change_type) {
940 case DVB_CA_EN50221_CAMCHANGE_REMOVED:
941 case DVB_CA_EN50221_CAMCHANGE_INSERTED:
942 break;
943
944 default:
945 return;
946 }
947
948 sl->camchange_type = change_type;
949 atomic_inc(&sl->camchange_count);
950 dvb_ca_en50221_thread_wakeup(ca);
951}
952EXPORT_SYMBOL(dvb_ca_en50221_camchange_irq);
953
954
955
956
957
958
959
960void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221 *pubca, int slot)
961{
962 struct dvb_ca_private *ca = pubca->private;
963 struct dvb_ca_slot *sl = &ca->slot_info[slot];
964
965 dprintk("CAMREADY IRQ slot:%i\n", slot);
966
967 if (sl->slot_state == DVB_CA_SLOTSTATE_WAITREADY) {
968 sl->slot_state = DVB_CA_SLOTSTATE_VALIDATE;
969 dvb_ca_en50221_thread_wakeup(ca);
970 }
971}
972EXPORT_SYMBOL(dvb_ca_en50221_camready_irq);
973
974
975
976
977
978
979
980void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *pubca, int slot)
981{
982 struct dvb_ca_private *ca = pubca->private;
983 struct dvb_ca_slot *sl = &ca->slot_info[slot];
984 int flags;
985
986 dprintk("FR/DA IRQ slot:%i\n", slot);
987
988 switch (sl->slot_state) {
989 case DVB_CA_SLOTSTATE_LINKINIT:
990 flags = ca->pub->read_cam_control(pubca, slot, CTRLIF_STATUS);
991 if (flags & STATUSREG_DA) {
992 dprintk("CAM supports DA IRQ\n");
993 sl->da_irq_supported = 1;
994 }
995 break;
996
997 case DVB_CA_SLOTSTATE_RUNNING:
998 if (ca->open)
999 dvb_ca_en50221_thread_wakeup(ca);
1000 break;
1001 }
1002}
1003EXPORT_SYMBOL(dvb_ca_en50221_frda_irq);
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca)
1014{
1015 dprintk("%s\n", __func__);
1016
1017 ca->wakeup = 1;
1018 mb();
1019 wake_up_process(ca->thread);
1020}
1021
1022
1023
1024
1025
1026
1027static void dvb_ca_en50221_thread_update_delay(struct dvb_ca_private *ca)
1028{
1029 int delay;
1030 int curdelay = 100000000;
1031 int slot;
1032
1033
1034
1035
1036
1037 for (slot = 0; slot < ca->slot_count; slot++) {
1038 struct dvb_ca_slot *sl = &ca->slot_info[slot];
1039
1040 switch (sl->slot_state) {
1041 default:
1042 case DVB_CA_SLOTSTATE_NONE:
1043 delay = HZ * 60;
1044 if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE))
1045 delay = HZ * 5;
1046 break;
1047 case DVB_CA_SLOTSTATE_INVALID:
1048 delay = HZ * 60;
1049 if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE))
1050 delay = HZ / 10;
1051 break;
1052
1053 case DVB_CA_SLOTSTATE_UNINITIALISED:
1054 case DVB_CA_SLOTSTATE_WAITREADY:
1055 case DVB_CA_SLOTSTATE_VALIDATE:
1056 case DVB_CA_SLOTSTATE_WAITFR:
1057 case DVB_CA_SLOTSTATE_LINKINIT:
1058 delay = HZ / 10;
1059 break;
1060
1061 case DVB_CA_SLOTSTATE_RUNNING:
1062 delay = HZ * 60;
1063 if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE))
1064 delay = HZ / 10;
1065 if (ca->open) {
1066 if ((!sl->da_irq_supported) ||
1067 (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_DA)))
1068 delay = HZ / 10;
1069 }
1070 break;
1071 }
1072
1073 if (delay < curdelay)
1074 curdelay = delay;
1075 }
1076
1077 ca->delay = curdelay;
1078}
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089static int dvb_ca_en50221_poll_cam_gone(struct dvb_ca_private *ca, int slot)
1090{
1091 int changed = 0;
1092 int status;
1093
1094
1095
1096
1097
1098 if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) &&
1099 (ca->pub->poll_slot_status)) {
1100 status = ca->pub->poll_slot_status(ca->pub, slot, 0);
1101 if (!(status &
1102 DVB_CA_EN50221_POLL_CAM_PRESENT)) {
1103 ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE;
1104 dvb_ca_en50221_thread_update_delay(ca);
1105 changed = 1;
1106 }
1107 }
1108 return changed;
1109}
1110
1111
1112
1113
1114
1115
1116
1117
1118static void dvb_ca_en50221_thread_state_machine(struct dvb_ca_private *ca,
1119 int slot)
1120{
1121 struct dvb_ca_slot *sl = &ca->slot_info[slot];
1122 int flags;
1123 int pktcount;
1124 void *rxbuf;
1125
1126 mutex_lock(&sl->slot_lock);
1127
1128
1129 while (dvb_ca_en50221_check_camstatus(ca, slot)) {
1130
1131 if (sl->slot_state != DVB_CA_SLOTSTATE_NONE)
1132 dvb_ca_en50221_slot_shutdown(ca, slot);
1133
1134
1135 if (sl->camchange_type == DVB_CA_EN50221_CAMCHANGE_INSERTED)
1136 sl->slot_state = DVB_CA_SLOTSTATE_UNINITIALISED;
1137
1138
1139 dvb_ca_en50221_thread_update_delay(ca);
1140 atomic_dec(&sl->camchange_count);
1141 }
1142
1143
1144 switch (sl->slot_state) {
1145 case DVB_CA_SLOTSTATE_NONE:
1146 case DVB_CA_SLOTSTATE_INVALID:
1147
1148 break;
1149
1150 case DVB_CA_SLOTSTATE_UNINITIALISED:
1151 sl->slot_state = DVB_CA_SLOTSTATE_WAITREADY;
1152 ca->pub->slot_reset(ca->pub, slot);
1153 sl->timeout = jiffies + (INIT_TIMEOUT_SECS * HZ);
1154 break;
1155
1156 case DVB_CA_SLOTSTATE_WAITREADY:
1157 if (time_after(jiffies, sl->timeout)) {
1158 pr_err("dvb_ca adaptor %d: PC card did not respond :(\n",
1159 ca->dvbdev->adapter->num);
1160 sl->slot_state = DVB_CA_SLOTSTATE_INVALID;
1161 dvb_ca_en50221_thread_update_delay(ca);
1162 break;
1163 }
1164
1165
1166
1167
1168 break;
1169
1170 case DVB_CA_SLOTSTATE_VALIDATE:
1171 if (dvb_ca_en50221_parse_attributes(ca, slot) != 0) {
1172 if (dvb_ca_en50221_poll_cam_gone(ca, slot))
1173 break;
1174
1175 pr_err("dvb_ca adapter %d: Invalid PC card inserted :(\n",
1176 ca->dvbdev->adapter->num);
1177 sl->slot_state = DVB_CA_SLOTSTATE_INVALID;
1178 dvb_ca_en50221_thread_update_delay(ca);
1179 break;
1180 }
1181 if (dvb_ca_en50221_set_configoption(ca, slot) != 0) {
1182 pr_err("dvb_ca adapter %d: Unable to initialise CAM :(\n",
1183 ca->dvbdev->adapter->num);
1184 sl->slot_state = DVB_CA_SLOTSTATE_INVALID;
1185 dvb_ca_en50221_thread_update_delay(ca);
1186 break;
1187 }
1188 if (ca->pub->write_cam_control(ca->pub, slot,
1189 CTRLIF_COMMAND,
1190 CMDREG_RS) != 0) {
1191 pr_err("dvb_ca adapter %d: Unable to reset CAM IF\n",
1192 ca->dvbdev->adapter->num);
1193 sl->slot_state = DVB_CA_SLOTSTATE_INVALID;
1194 dvb_ca_en50221_thread_update_delay(ca);
1195 break;
1196 }
1197 dprintk("DVB CAM validated successfully\n");
1198
1199 sl->timeout = jiffies + (INIT_TIMEOUT_SECS * HZ);
1200 sl->slot_state = DVB_CA_SLOTSTATE_WAITFR;
1201 ca->wakeup = 1;
1202 break;
1203
1204 case DVB_CA_SLOTSTATE_WAITFR:
1205 if (time_after(jiffies, sl->timeout)) {
1206 pr_err("dvb_ca adapter %d: DVB CAM did not respond :(\n",
1207 ca->dvbdev->adapter->num);
1208 sl->slot_state = DVB_CA_SLOTSTATE_INVALID;
1209 dvb_ca_en50221_thread_update_delay(ca);
1210 break;
1211 }
1212
1213 flags = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS);
1214 if (flags & STATUSREG_FR) {
1215 sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT;
1216 ca->wakeup = 1;
1217 }
1218 break;
1219
1220 case DVB_CA_SLOTSTATE_LINKINIT:
1221 if (dvb_ca_en50221_link_init(ca, slot) != 0) {
1222 if (dvb_ca_en50221_poll_cam_gone(ca, slot))
1223 break;
1224
1225 pr_err("dvb_ca adapter %d: DVB CAM link initialisation failed :(\n",
1226 ca->dvbdev->adapter->num);
1227 sl->slot_state = DVB_CA_SLOTSTATE_UNINITIALISED;
1228 dvb_ca_en50221_thread_update_delay(ca);
1229 break;
1230 }
1231
1232 if (!sl->rx_buffer.data) {
1233 rxbuf = vmalloc(RX_BUFFER_SIZE);
1234 if (!rxbuf) {
1235 pr_err("dvb_ca adapter %d: Unable to allocate CAM rx buffer :(\n",
1236 ca->dvbdev->adapter->num);
1237 sl->slot_state = DVB_CA_SLOTSTATE_INVALID;
1238 dvb_ca_en50221_thread_update_delay(ca);
1239 break;
1240 }
1241 dvb_ringbuffer_init(&sl->rx_buffer, rxbuf,
1242 RX_BUFFER_SIZE);
1243 }
1244
1245 ca->pub->slot_ts_enable(ca->pub, slot);
1246 sl->slot_state = DVB_CA_SLOTSTATE_RUNNING;
1247 dvb_ca_en50221_thread_update_delay(ca);
1248 pr_info("dvb_ca adapter %d: DVB CAM detected and initialised successfully\n",
1249 ca->dvbdev->adapter->num);
1250 break;
1251
1252 case DVB_CA_SLOTSTATE_RUNNING:
1253 if (!ca->open)
1254 break;
1255
1256
1257 pktcount = 0;
1258 while (dvb_ca_en50221_read_data(ca, slot, NULL, 0) > 0) {
1259 if (!ca->open)
1260 break;
1261
1262
1263
1264
1265
1266 if (dvb_ca_en50221_check_camstatus(ca, slot)) {
1267
1268
1269
1270
1271 ca->wakeup = 1;
1272 break;
1273 }
1274
1275
1276 if (++pktcount >= MAX_RX_PACKETS_PER_ITERATION) {
1277
1278
1279
1280
1281 ca->wakeup = 1;
1282 break;
1283 }
1284 }
1285 break;
1286 }
1287
1288 mutex_unlock(&sl->slot_lock);
1289}
1290
1291
1292
1293
1294
1295static int dvb_ca_en50221_thread(void *data)
1296{
1297 struct dvb_ca_private *ca = data;
1298 int slot;
1299
1300 dprintk("%s\n", __func__);
1301
1302
1303 dvb_ca_en50221_thread_update_delay(ca);
1304
1305
1306 while (!kthread_should_stop()) {
1307
1308 if (!ca->wakeup) {
1309 set_current_state(TASK_INTERRUPTIBLE);
1310 schedule_timeout(ca->delay);
1311 if (kthread_should_stop())
1312 return 0;
1313 }
1314 ca->wakeup = 0;
1315
1316
1317 for (slot = 0; slot < ca->slot_count; slot++)
1318 dvb_ca_en50221_thread_state_machine(ca, slot);
1319 }
1320
1321 return 0;
1322}
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338static int dvb_ca_en50221_io_do_ioctl(struct file *file,
1339 unsigned int cmd, void *parg)
1340{
1341 struct dvb_device *dvbdev = file->private_data;
1342 struct dvb_ca_private *ca = dvbdev->priv;
1343 int err = 0;
1344 int slot;
1345
1346 dprintk("%s\n", __func__);
1347
1348 if (mutex_lock_interruptible(&ca->ioctl_mutex))
1349 return -ERESTARTSYS;
1350
1351 switch (cmd) {
1352 case CA_RESET:
1353 for (slot = 0; slot < ca->slot_count; slot++) {
1354 struct dvb_ca_slot *sl = &ca->slot_info[slot];
1355
1356 mutex_lock(&sl->slot_lock);
1357 if (sl->slot_state != DVB_CA_SLOTSTATE_NONE) {
1358 dvb_ca_en50221_slot_shutdown(ca, slot);
1359 if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)
1360 dvb_ca_en50221_camchange_irq(ca->pub,
1361 slot,
1362 DVB_CA_EN50221_CAMCHANGE_INSERTED);
1363 }
1364 mutex_unlock(&sl->slot_lock);
1365 }
1366 ca->next_read_slot = 0;
1367 dvb_ca_en50221_thread_wakeup(ca);
1368 break;
1369
1370 case CA_GET_CAP: {
1371 struct ca_caps *caps = parg;
1372
1373 caps->slot_num = ca->slot_count;
1374 caps->slot_type = CA_CI_LINK;
1375 caps->descr_num = 0;
1376 caps->descr_type = 0;
1377 break;
1378 }
1379
1380 case CA_GET_SLOT_INFO: {
1381 struct ca_slot_info *info = parg;
1382 struct dvb_ca_slot *sl;
1383
1384 slot = info->num;
1385 if ((slot >= ca->slot_count) || (slot < 0)) {
1386 err = -EINVAL;
1387 goto out_unlock;
1388 }
1389 slot = array_index_nospec(slot, ca->slot_count);
1390
1391 info->type = CA_CI_LINK;
1392 info->flags = 0;
1393 sl = &ca->slot_info[slot];
1394 if ((sl->slot_state != DVB_CA_SLOTSTATE_NONE) &&
1395 (sl->slot_state != DVB_CA_SLOTSTATE_INVALID)) {
1396 info->flags = CA_CI_MODULE_PRESENT;
1397 }
1398 if (sl->slot_state == DVB_CA_SLOTSTATE_RUNNING)
1399 info->flags |= CA_CI_MODULE_READY;
1400 break;
1401 }
1402
1403 default:
1404 err = -EINVAL;
1405 break;
1406 }
1407
1408out_unlock:
1409 mutex_unlock(&ca->ioctl_mutex);
1410 return err;
1411}
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422static long dvb_ca_en50221_io_ioctl(struct file *file,
1423 unsigned int cmd, unsigned long arg)
1424{
1425 return dvb_usercopy(file, cmd, arg, dvb_ca_en50221_io_do_ioctl);
1426}
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438static ssize_t dvb_ca_en50221_io_write(struct file *file,
1439 const char __user *buf, size_t count,
1440 loff_t *ppos)
1441{
1442 struct dvb_device *dvbdev = file->private_data;
1443 struct dvb_ca_private *ca = dvbdev->priv;
1444 struct dvb_ca_slot *sl;
1445 u8 slot, connection_id;
1446 int status;
1447 u8 fragbuf[HOST_LINK_BUF_SIZE];
1448 int fragpos = 0;
1449 int fraglen;
1450 unsigned long timeout;
1451 int written;
1452
1453 dprintk("%s\n", __func__);
1454
1455
1456
1457
1458
1459 if (count < 2)
1460 return -EINVAL;
1461
1462
1463 if (copy_from_user(&slot, buf, 1))
1464 return -EFAULT;
1465 if (copy_from_user(&connection_id, buf + 1, 1))
1466 return -EFAULT;
1467 buf += 2;
1468 count -= 2;
1469
1470 if (slot >= ca->slot_count)
1471 return -EINVAL;
1472 slot = array_index_nospec(slot, ca->slot_count);
1473 sl = &ca->slot_info[slot];
1474
1475
1476 if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING)
1477 return -EINVAL;
1478
1479
1480 while (fragpos < count) {
1481 fraglen = sl->link_buf_size - 2;
1482 if (fraglen < 0)
1483 break;
1484 if (fraglen > HOST_LINK_BUF_SIZE - 2)
1485 fraglen = HOST_LINK_BUF_SIZE - 2;
1486 if ((count - fragpos) < fraglen)
1487 fraglen = count - fragpos;
1488
1489 fragbuf[0] = connection_id;
1490 fragbuf[1] = ((fragpos + fraglen) < count) ? 0x80 : 0x00;
1491 status = copy_from_user(fragbuf + 2, buf + fragpos, fraglen);
1492 if (status) {
1493 status = -EFAULT;
1494 goto exit;
1495 }
1496
1497 timeout = jiffies + HZ / 2;
1498 written = 0;
1499 while (!time_after(jiffies, timeout)) {
1500
1501
1502
1503
1504 if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) {
1505 status = -EIO;
1506 goto exit;
1507 }
1508
1509 mutex_lock(&sl->slot_lock);
1510 status = dvb_ca_en50221_write_data(ca, slot, fragbuf,
1511 fraglen + 2);
1512 mutex_unlock(&sl->slot_lock);
1513 if (status == (fraglen + 2)) {
1514 written = 1;
1515 break;
1516 }
1517 if (status != -EAGAIN)
1518 goto exit;
1519
1520 usleep_range(1000, 1100);
1521 }
1522 if (!written) {
1523 status = -EIO;
1524 goto exit;
1525 }
1526
1527 fragpos += fraglen;
1528 }
1529 status = count + 2;
1530
1531exit:
1532 return status;
1533}
1534
1535
1536
1537
1538static int dvb_ca_en50221_io_read_condition(struct dvb_ca_private *ca,
1539 int *result, int *_slot)
1540{
1541 int slot;
1542 int slot_count = 0;
1543 int idx;
1544 size_t fraglen;
1545 int connection_id = -1;
1546 int found = 0;
1547 u8 hdr[2];
1548
1549 slot = ca->next_read_slot;
1550 while ((slot_count < ca->slot_count) && (!found)) {
1551 struct dvb_ca_slot *sl = &ca->slot_info[slot];
1552
1553 if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING)
1554 goto nextslot;
1555
1556 if (!sl->rx_buffer.data)
1557 return 0;
1558
1559 idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, -1, &fraglen);
1560 while (idx != -1) {
1561 dvb_ringbuffer_pkt_read(&sl->rx_buffer, idx, 0, hdr, 2);
1562 if (connection_id == -1)
1563 connection_id = hdr[0];
1564 if ((hdr[0] == connection_id) &&
1565 ((hdr[1] & 0x80) == 0)) {
1566 *_slot = slot;
1567 found = 1;
1568 break;
1569 }
1570
1571 idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, idx,
1572 &fraglen);
1573 }
1574
1575nextslot:
1576 slot = (slot + 1) % ca->slot_count;
1577 slot_count++;
1578 }
1579
1580 ca->next_read_slot = slot;
1581 return found;
1582}
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user *buf,
1595 size_t count, loff_t *ppos)
1596{
1597 struct dvb_device *dvbdev = file->private_data;
1598 struct dvb_ca_private *ca = dvbdev->priv;
1599 struct dvb_ca_slot *sl;
1600 int status;
1601 int result = 0;
1602 u8 hdr[2];
1603 int slot;
1604 int connection_id = -1;
1605 size_t idx, idx2;
1606 int last_fragment = 0;
1607 size_t fraglen;
1608 int pktlen;
1609 int dispose = 0;
1610
1611 dprintk("%s\n", __func__);
1612
1613
1614
1615
1616
1617 if (count < 2)
1618 return -EINVAL;
1619
1620
1621 status = dvb_ca_en50221_io_read_condition(ca, &result, &slot);
1622 if (status == 0) {
1623
1624 if (file->f_flags & O_NONBLOCK)
1625 return -EWOULDBLOCK;
1626
1627
1628 status = wait_event_interruptible(ca->wait_queue,
1629 dvb_ca_en50221_io_read_condition
1630 (ca, &result, &slot));
1631 }
1632 if ((status < 0) || (result < 0)) {
1633 if (result)
1634 return result;
1635 return status;
1636 }
1637
1638 sl = &ca->slot_info[slot];
1639 idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, -1, &fraglen);
1640 pktlen = 2;
1641 do {
1642 if (idx == -1) {
1643 pr_err("dvb_ca adapter %d: BUG: read packet ended before last_fragment encountered\n",
1644 ca->dvbdev->adapter->num);
1645 status = -EIO;
1646 goto exit;
1647 }
1648
1649 dvb_ringbuffer_pkt_read(&sl->rx_buffer, idx, 0, hdr, 2);
1650 if (connection_id == -1)
1651 connection_id = hdr[0];
1652 if (hdr[0] == connection_id) {
1653 if (pktlen < count) {
1654 if ((pktlen + fraglen - 2) > count)
1655 fraglen = count - pktlen;
1656 else
1657 fraglen -= 2;
1658
1659 status =
1660 dvb_ringbuffer_pkt_read_user(&sl->rx_buffer,
1661 idx, 2,
1662 buf + pktlen,
1663 fraglen);
1664 if (status < 0)
1665 goto exit;
1666
1667 pktlen += fraglen;
1668 }
1669
1670 if ((hdr[1] & 0x80) == 0)
1671 last_fragment = 1;
1672 dispose = 1;
1673 }
1674
1675 idx2 = dvb_ringbuffer_pkt_next(&sl->rx_buffer, idx, &fraglen);
1676 if (dispose)
1677 dvb_ringbuffer_pkt_dispose(&sl->rx_buffer, idx);
1678 idx = idx2;
1679 dispose = 0;
1680 } while (!last_fragment);
1681
1682 hdr[0] = slot;
1683 hdr[1] = connection_id;
1684 status = copy_to_user(buf, hdr, 2);
1685 if (status) {
1686 status = -EFAULT;
1687 goto exit;
1688 }
1689 status = pktlen;
1690
1691exit:
1692 return status;
1693}
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703static int dvb_ca_en50221_io_open(struct inode *inode, struct file *file)
1704{
1705 struct dvb_device *dvbdev = file->private_data;
1706 struct dvb_ca_private *ca = dvbdev->priv;
1707 int err;
1708 int i;
1709
1710 dprintk("%s\n", __func__);
1711
1712 if (!try_module_get(ca->pub->owner))
1713 return -EIO;
1714
1715 err = dvb_generic_open(inode, file);
1716 if (err < 0) {
1717 module_put(ca->pub->owner);
1718 return err;
1719 }
1720
1721 for (i = 0; i < ca->slot_count; i++) {
1722 struct dvb_ca_slot *sl = &ca->slot_info[i];
1723
1724 if (sl->slot_state == DVB_CA_SLOTSTATE_RUNNING) {
1725 if (!sl->rx_buffer.data) {
1726
1727
1728
1729
1730
1731 dvb_ringbuffer_flush(&sl->rx_buffer);
1732 }
1733 }
1734 }
1735
1736 ca->open = 1;
1737 dvb_ca_en50221_thread_update_delay(ca);
1738 dvb_ca_en50221_thread_wakeup(ca);
1739
1740 dvb_ca_private_get(ca);
1741
1742 return 0;
1743}
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753static int dvb_ca_en50221_io_release(struct inode *inode, struct file *file)
1754{
1755 struct dvb_device *dvbdev = file->private_data;
1756 struct dvb_ca_private *ca = dvbdev->priv;
1757 int err;
1758
1759 dprintk("%s\n", __func__);
1760
1761
1762 ca->open = 0;
1763 dvb_ca_en50221_thread_update_delay(ca);
1764
1765 err = dvb_generic_release(inode, file);
1766
1767 module_put(ca->pub->owner);
1768
1769 dvb_ca_private_put(ca);
1770
1771 return err;
1772}
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782static __poll_t dvb_ca_en50221_io_poll(struct file *file, poll_table *wait)
1783{
1784 struct dvb_device *dvbdev = file->private_data;
1785 struct dvb_ca_private *ca = dvbdev->priv;
1786 __poll_t mask = 0;
1787 int slot;
1788 int result = 0;
1789
1790 dprintk("%s\n", __func__);
1791
1792 poll_wait(file, &ca->wait_queue, wait);
1793
1794 if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1)
1795 mask |= EPOLLIN;
1796
1797
1798 if (mask)
1799 return mask;
1800
1801 if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1)
1802 mask |= EPOLLIN;
1803
1804 return mask;
1805}
1806
1807static const struct file_operations dvb_ca_fops = {
1808 .owner = THIS_MODULE,
1809 .read = dvb_ca_en50221_io_read,
1810 .write = dvb_ca_en50221_io_write,
1811 .unlocked_ioctl = dvb_ca_en50221_io_ioctl,
1812 .open = dvb_ca_en50221_io_open,
1813 .release = dvb_ca_en50221_io_release,
1814 .poll = dvb_ca_en50221_io_poll,
1815 .llseek = noop_llseek,
1816};
1817
1818static const struct dvb_device dvbdev_ca = {
1819 .priv = NULL,
1820 .users = 1,
1821 .readers = 1,
1822 .writers = 1,
1823#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
1824 .name = "dvb-ca-en50221",
1825#endif
1826 .fops = &dvb_ca_fops,
1827};
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter,
1843 struct dvb_ca_en50221 *pubca, int flags, int slot_count)
1844{
1845 int ret;
1846 struct dvb_ca_private *ca = NULL;
1847 int i;
1848
1849 dprintk("%s\n", __func__);
1850
1851 if (slot_count < 1)
1852 return -EINVAL;
1853
1854
1855 ca = kzalloc(sizeof(*ca), GFP_KERNEL);
1856 if (!ca) {
1857 ret = -ENOMEM;
1858 goto exit;
1859 }
1860 kref_init(&ca->refcount);
1861 ca->pub = pubca;
1862 ca->flags = flags;
1863 ca->slot_count = slot_count;
1864 ca->slot_info = kcalloc(slot_count, sizeof(struct dvb_ca_slot),
1865 GFP_KERNEL);
1866 if (!ca->slot_info) {
1867 ret = -ENOMEM;
1868 goto free_ca;
1869 }
1870 init_waitqueue_head(&ca->wait_queue);
1871 ca->open = 0;
1872 ca->wakeup = 0;
1873 ca->next_read_slot = 0;
1874 pubca->private = ca;
1875
1876
1877 ret = dvb_register_device(dvb_adapter, &ca->dvbdev, &dvbdev_ca, ca,
1878 DVB_DEVICE_CA, 0);
1879 if (ret)
1880 goto free_slot_info;
1881
1882
1883 for (i = 0; i < slot_count; i++) {
1884 struct dvb_ca_slot *sl = &ca->slot_info[i];
1885
1886 memset(sl, 0, sizeof(struct dvb_ca_slot));
1887 sl->slot_state = DVB_CA_SLOTSTATE_NONE;
1888 atomic_set(&sl->camchange_count, 0);
1889 sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED;
1890 mutex_init(&sl->slot_lock);
1891 }
1892
1893 mutex_init(&ca->ioctl_mutex);
1894
1895 if (signal_pending(current)) {
1896 ret = -EINTR;
1897 goto unregister_device;
1898 }
1899 mb();
1900
1901
1902 ca->thread = kthread_run(dvb_ca_en50221_thread, ca, "kdvb-ca-%i:%i",
1903 ca->dvbdev->adapter->num, ca->dvbdev->id);
1904 if (IS_ERR(ca->thread)) {
1905 ret = PTR_ERR(ca->thread);
1906 pr_err("dvb_ca_init: failed to start kernel_thread (%d)\n",
1907 ret);
1908 goto unregister_device;
1909 }
1910 return 0;
1911
1912unregister_device:
1913 dvb_unregister_device(ca->dvbdev);
1914free_slot_info:
1915 kfree(ca->slot_info);
1916free_ca:
1917 kfree(ca);
1918exit:
1919 pubca->private = NULL;
1920 return ret;
1921}
1922EXPORT_SYMBOL(dvb_ca_en50221_init);
1923
1924
1925
1926
1927
1928
1929void dvb_ca_en50221_release(struct dvb_ca_en50221 *pubca)
1930{
1931 struct dvb_ca_private *ca = pubca->private;
1932 int i;
1933
1934 dprintk("%s\n", __func__);
1935
1936
1937 kthread_stop(ca->thread);
1938
1939 for (i = 0; i < ca->slot_count; i++)
1940 dvb_ca_en50221_slot_shutdown(ca, i);
1941
1942 dvb_remove_device(ca->dvbdev);
1943 dvb_ca_private_put(ca);
1944 pubca->private = NULL;
1945}
1946EXPORT_SYMBOL(dvb_ca_en50221_release);
1947