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26
27
28#define pr_fmt(fmt) "dvb_ca_en50221: " fmt
29
30#include <linux/errno.h>
31#include <linux/slab.h>
32#include <linux/list.h>
33#include <linux/module.h>
34#include <linux/vmalloc.h>
35#include <linux/delay.h>
36#include <linux/spinlock.h>
37#include <linux/sched/signal.h>
38#include <linux/kthread.h>
39
40#include <media/dvb_ca_en50221.h>
41#include <media/dvb_ringbuffer.h>
42
43static int dvb_ca_en50221_debug;
44
45module_param_named(cam_debug, dvb_ca_en50221_debug, int, 0644);
46MODULE_PARM_DESC(cam_debug, "enable verbose debug messages");
47
48#define dprintk(fmt, arg...) do { \
49 if (dvb_ca_en50221_debug) \
50 printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg);\
51} while (0)
52
53#define INIT_TIMEOUT_SECS 10
54
55#define HOST_LINK_BUF_SIZE 0x200
56
57#define RX_BUFFER_SIZE 65535
58
59#define MAX_RX_PACKETS_PER_ITERATION 10
60
61#define CTRLIF_DATA 0
62#define CTRLIF_COMMAND 1
63#define CTRLIF_STATUS 1
64#define CTRLIF_SIZE_LOW 2
65#define CTRLIF_SIZE_HIGH 3
66
67#define CMDREG_HC 1
68#define CMDREG_SW 2
69#define CMDREG_SR 4
70#define CMDREG_RS 8
71#define CMDREG_FRIE 0x40
72#define CMDREG_DAIE 0x80
73#define IRQEN (CMDREG_DAIE)
74
75#define STATUSREG_RE 1
76#define STATUSREG_WE 2
77#define STATUSREG_FR 0x40
78#define STATUSREG_DA 0x80
79
80#define DVB_CA_SLOTSTATE_NONE 0
81#define DVB_CA_SLOTSTATE_UNINITIALISED 1
82#define DVB_CA_SLOTSTATE_RUNNING 2
83#define DVB_CA_SLOTSTATE_INVALID 3
84#define DVB_CA_SLOTSTATE_WAITREADY 4
85#define DVB_CA_SLOTSTATE_VALIDATE 5
86#define DVB_CA_SLOTSTATE_WAITFR 6
87#define DVB_CA_SLOTSTATE_LINKINIT 7
88
89
90struct dvb_ca_slot {
91
92 int slot_state;
93
94
95 struct mutex slot_lock;
96
97
98 atomic_t camchange_count;
99
100
101 int camchange_type;
102
103
104 u32 config_base;
105
106
107 u8 config_option;
108
109
110 u8 da_irq_supported:1;
111
112
113 int link_buf_size;
114
115
116 struct dvb_ringbuffer rx_buffer;
117
118
119 unsigned long timeout;
120};
121
122
123struct dvb_ca_private {
124 struct kref refcount;
125
126
127 struct dvb_ca_en50221 *pub;
128
129
130 struct dvb_device *dvbdev;
131
132
133 u32 flags;
134
135
136 unsigned int slot_count;
137
138
139 struct dvb_ca_slot *slot_info;
140
141
142 wait_queue_head_t wait_queue;
143
144
145 struct task_struct *thread;
146
147
148 unsigned int open:1;
149
150
151 unsigned int wakeup:1;
152
153
154 unsigned long delay;
155
156
157
158
159
160 int next_read_slot;
161
162
163 struct mutex ioctl_mutex;
164};
165
166static void dvb_ca_private_free(struct dvb_ca_private *ca)
167{
168 unsigned int i;
169
170 dvb_free_device(ca->dvbdev);
171 for (i = 0; i < ca->slot_count; i++)
172 vfree(ca->slot_info[i].rx_buffer.data);
173
174 kfree(ca->slot_info);
175 kfree(ca);
176}
177
178static void dvb_ca_private_release(struct kref *ref)
179{
180 struct dvb_ca_private *ca;
181
182 ca = container_of(ref, struct dvb_ca_private, refcount);
183 dvb_ca_private_free(ca);
184}
185
186static void dvb_ca_private_get(struct dvb_ca_private *ca)
187{
188 kref_get(&ca->refcount);
189}
190
191static void dvb_ca_private_put(struct dvb_ca_private *ca)
192{
193 kref_put(&ca->refcount, dvb_ca_private_release);
194}
195
196static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca);
197static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot,
198 u8 *ebuf, int ecount);
199static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot,
200 u8 *ebuf, int ecount);
201
202
203
204
205
206
207
208
209
210
211static char *findstr(char *haystack, int hlen, char *needle, int nlen)
212{
213 int i;
214
215 if (hlen < nlen)
216 return NULL;
217
218 for (i = 0; i <= hlen - nlen; i++) {
219 if (!strncmp(haystack + i, needle, nlen))
220 return haystack + i;
221 }
222
223 return NULL;
224}
225
226
227
228
229
230
231
232static int dvb_ca_en50221_check_camstatus(struct dvb_ca_private *ca, int slot)
233{
234 struct dvb_ca_slot *sl = &ca->slot_info[slot];
235 int slot_status;
236 int cam_present_now;
237 int cam_changed;
238
239
240 if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)
241 return (atomic_read(&sl->camchange_count) != 0);
242
243
244 slot_status = ca->pub->poll_slot_status(ca->pub, slot, ca->open);
245
246 cam_present_now = (slot_status & DVB_CA_EN50221_POLL_CAM_PRESENT) ? 1 : 0;
247 cam_changed = (slot_status & DVB_CA_EN50221_POLL_CAM_CHANGED) ? 1 : 0;
248 if (!cam_changed) {
249 int cam_present_old = (sl->slot_state != DVB_CA_SLOTSTATE_NONE);
250
251 cam_changed = (cam_present_now != cam_present_old);
252 }
253
254 if (cam_changed) {
255 if (!cam_present_now)
256 sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED;
257 else
258 sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_INSERTED;
259 atomic_set(&sl->camchange_count, 1);
260 } else {
261 if ((sl->slot_state == DVB_CA_SLOTSTATE_WAITREADY) &&
262 (slot_status & DVB_CA_EN50221_POLL_CAM_READY)) {
263
264 sl->slot_state = DVB_CA_SLOTSTATE_VALIDATE;
265 }
266 }
267
268 return cam_changed;
269}
270
271
272
273
274
275
276
277
278
279
280
281
282static int dvb_ca_en50221_wait_if_status(struct dvb_ca_private *ca, int slot,
283 u8 waitfor, int timeout_hz)
284{
285 unsigned long timeout;
286 unsigned long start;
287
288 dprintk("%s\n", __func__);
289
290
291 start = jiffies;
292 timeout = jiffies + timeout_hz;
293 while (1) {
294 int res;
295
296
297 res = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS);
298 if (res < 0)
299 return -EIO;
300
301
302 if (res & waitfor) {
303 dprintk("%s succeeded timeout:%lu\n",
304 __func__, jiffies - start);
305 return 0;
306 }
307
308
309 if (time_after(jiffies, timeout))
310 break;
311
312
313 usleep_range(1000, 1100);
314 }
315
316 dprintk("%s failed timeout:%lu\n", __func__, jiffies - start);
317
318
319 return -ETIMEDOUT;
320}
321
322
323
324
325
326
327
328
329
330static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot)
331{
332 struct dvb_ca_slot *sl = &ca->slot_info[slot];
333 int ret;
334 int buf_size;
335 u8 buf[2];
336
337 dprintk("%s\n", __func__);
338
339
340 sl->da_irq_supported = 0;
341
342
343
344
345
346 sl->link_buf_size = 2;
347
348
349 ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND,
350 IRQEN | CMDREG_SR);
351 if (ret)
352 return ret;
353 ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ);
354 if (ret)
355 return ret;
356 ret = dvb_ca_en50221_read_data(ca, slot, buf, 2);
357 if (ret != 2)
358 return -EIO;
359 ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN);
360 if (ret)
361 return ret;
362
363
364
365
366
367 buf_size = (buf[0] << 8) | buf[1];
368 if (buf_size > HOST_LINK_BUF_SIZE)
369 buf_size = HOST_LINK_BUF_SIZE;
370 sl->link_buf_size = buf_size;
371 buf[0] = buf_size >> 8;
372 buf[1] = buf_size & 0xff;
373 dprintk("Chosen link buffer size of %i\n", buf_size);
374
375
376 ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND,
377 IRQEN | CMDREG_SW);
378 if (ret)
379 return ret;
380 ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10);
381 if (ret)
382 return ret;
383 ret = dvb_ca_en50221_write_data(ca, slot, buf, 2);
384 if (ret != 2)
385 return -EIO;
386 ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN);
387 if (ret)
388 return ret;
389
390
391 return 0;
392}
393
394
395
396
397
398
399
400
401
402
403
404
405
406static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot,
407 int *address, int *tuple_type,
408 int *tuple_length, u8 *tuple)
409{
410 int i;
411 int _tuple_type;
412 int _tuple_length;
413 int _address = *address;
414
415
416 _tuple_type = ca->pub->read_attribute_mem(ca->pub, slot, _address);
417 if (_tuple_type < 0)
418 return _tuple_type;
419 if (_tuple_type == 0xff) {
420 dprintk("END OF CHAIN TUPLE type:0x%x\n", _tuple_type);
421 *address += 2;
422 *tuple_type = _tuple_type;
423 *tuple_length = 0;
424 return 0;
425 }
426 _tuple_length = ca->pub->read_attribute_mem(ca->pub, slot,
427 _address + 2);
428 if (_tuple_length < 0)
429 return _tuple_length;
430 _address += 4;
431
432 dprintk("TUPLE type:0x%x length:%i\n", _tuple_type, _tuple_length);
433
434
435 for (i = 0; i < _tuple_length; i++) {
436 tuple[i] = ca->pub->read_attribute_mem(ca->pub, slot,
437 _address + (i * 2));
438 dprintk(" 0x%02x: 0x%02x %c\n",
439 i, tuple[i] & 0xff,
440 ((tuple[i] > 31) && (tuple[i] < 127)) ? tuple[i] : '.');
441 }
442 _address += (_tuple_length * 2);
443
444
445 *tuple_type = _tuple_type;
446 *tuple_length = _tuple_length;
447 *address = _address;
448 return 0;
449}
450
451
452
453
454
455
456
457
458
459
460static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot)
461{
462 struct dvb_ca_slot *sl;
463 int address = 0;
464 int tuple_length;
465 int tuple_type;
466 u8 tuple[257];
467 char *dvb_str;
468 int rasz;
469 int status;
470 int got_cftableentry = 0;
471 int end_chain = 0;
472 int i;
473 u16 manfid = 0;
474 u16 devid = 0;
475
476
477 status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type,
478 &tuple_length, tuple);
479 if (status < 0)
480 return status;
481 if (tuple_type != 0x1D)
482 return -EINVAL;
483
484
485 status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type,
486 &tuple_length, tuple);
487 if (status < 0)
488 return status;
489 if (tuple_type != 0x1C)
490 return -EINVAL;
491
492
493 status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type,
494 &tuple_length, tuple);
495 if (status < 0)
496 return status;
497 if (tuple_type != 0x15)
498 return -EINVAL;
499
500
501 status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type,
502 &tuple_length, tuple);
503 if (status < 0)
504 return status;
505 if (tuple_type != 0x20)
506 return -EINVAL;
507 if (tuple_length != 4)
508 return -EINVAL;
509 manfid = (tuple[1] << 8) | tuple[0];
510 devid = (tuple[3] << 8) | tuple[2];
511
512
513 status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type,
514 &tuple_length, tuple);
515 if (status < 0)
516 return status;
517 if (tuple_type != 0x1A)
518 return -EINVAL;
519 if (tuple_length < 3)
520 return -EINVAL;
521
522
523 rasz = tuple[0] & 3;
524 if (tuple_length < (3 + rasz + 14))
525 return -EINVAL;
526 sl = &ca->slot_info[slot];
527 sl->config_base = 0;
528 for (i = 0; i < rasz + 1; i++)
529 sl->config_base |= (tuple[2 + i] << (8 * i));
530
531
532 dvb_str = findstr((char *)tuple, tuple_length, "DVB_CI_V", 8);
533 if (!dvb_str)
534 return -EINVAL;
535 if (tuple_length < ((dvb_str - (char *)tuple) + 12))
536 return -EINVAL;
537
538
539 if (strncmp(dvb_str + 8, "1.00", 4)) {
540 pr_err("dvb_ca adapter %d: Unsupported DVB CAM module version %c%c%c%c\n",
541 ca->dvbdev->adapter->num, dvb_str[8], dvb_str[9],
542 dvb_str[10], dvb_str[11]);
543 return -EINVAL;
544 }
545
546
547 while ((!end_chain) && (address < 0x1000)) {
548 status = dvb_ca_en50221_read_tuple(ca, slot, &address,
549 &tuple_type, &tuple_length,
550 tuple);
551 if (status < 0)
552 return status;
553 switch (tuple_type) {
554 case 0x1B:
555 if (tuple_length < (2 + 11 + 17))
556 break;
557
558
559 if (got_cftableentry)
560 break;
561
562
563 sl->config_option = tuple[0] & 0x3f;
564
565
566 if (!findstr((char *)tuple, tuple_length,
567 "DVB_HOST", 8) ||
568 !findstr((char *)tuple, tuple_length,
569 "DVB_CI_MODULE", 13))
570 break;
571
572 got_cftableentry = 1;
573 break;
574
575 case 0x14:
576 break;
577
578 case 0xFF:
579 end_chain = 1;
580 break;
581
582 default:
583 dprintk("dvb_ca: Skipping unknown tuple type:0x%x length:0x%x\n",
584 tuple_type, tuple_length);
585 break;
586 }
587 }
588
589 if ((address > 0x1000) || (!got_cftableentry))
590 return -EINVAL;
591
592 dprintk("Valid DVB CAM detected MANID:%x DEVID:%x CONFIGBASE:0x%x CONFIGOPTION:0x%x\n",
593 manfid, devid, sl->config_base, sl->config_option);
594
595
596 return 0;
597}
598
599
600
601
602
603
604
605static int dvb_ca_en50221_set_configoption(struct dvb_ca_private *ca, int slot)
606{
607 struct dvb_ca_slot *sl = &ca->slot_info[slot];
608 int configoption;
609
610 dprintk("%s\n", __func__);
611
612
613 ca->pub->write_attribute_mem(ca->pub, slot, sl->config_base,
614 sl->config_option);
615
616
617 configoption = ca->pub->read_attribute_mem(ca->pub, slot,
618 sl->config_base);
619 dprintk("Set configoption 0x%x, read configoption 0x%x\n",
620 sl->config_option, configoption & 0x3f);
621
622
623 return 0;
624}
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot,
642 u8 *ebuf, int ecount)
643{
644 struct dvb_ca_slot *sl = &ca->slot_info[slot];
645 int bytes_read;
646 int status;
647 u8 buf[HOST_LINK_BUF_SIZE];
648 int i;
649
650 dprintk("%s\n", __func__);
651
652
653 if (!ebuf) {
654 int buf_free;
655
656 if (!sl->rx_buffer.data) {
657 status = -EIO;
658 goto exit;
659 }
660 buf_free = dvb_ringbuffer_free(&sl->rx_buffer);
661
662 if (buf_free < (sl->link_buf_size +
663 DVB_RINGBUFFER_PKTHDRSIZE)) {
664 status = -EAGAIN;
665 goto exit;
666 }
667 }
668
669 if (ca->pub->read_data &&
670 (sl->slot_state != DVB_CA_SLOTSTATE_LINKINIT)) {
671 if (!ebuf)
672 status = ca->pub->read_data(ca->pub, slot, buf,
673 sizeof(buf));
674 else
675 status = ca->pub->read_data(ca->pub, slot, buf, ecount);
676 if (status < 0)
677 return status;
678 bytes_read = status;
679 if (status == 0)
680 goto exit;
681 } else {
682
683 status = ca->pub->read_cam_control(ca->pub, slot,
684 CTRLIF_STATUS);
685 if (status < 0)
686 goto exit;
687 if (!(status & STATUSREG_DA)) {
688
689 status = 0;
690 goto exit;
691 }
692
693
694 status = ca->pub->read_cam_control(ca->pub, slot,
695 CTRLIF_SIZE_HIGH);
696 if (status < 0)
697 goto exit;
698 bytes_read = status << 8;
699 status = ca->pub->read_cam_control(ca->pub, slot,
700 CTRLIF_SIZE_LOW);
701 if (status < 0)
702 goto exit;
703 bytes_read |= status;
704
705
706 if (!ebuf) {
707 if (bytes_read > sl->link_buf_size) {
708 pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the link buffer size (%i > %i)!\n",
709 ca->dvbdev->adapter->num, bytes_read,
710 sl->link_buf_size);
711 sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT;
712 status = -EIO;
713 goto exit;
714 }
715 if (bytes_read < 2) {
716 pr_err("dvb_ca adapter %d: CAM sent a buffer that was less than 2 bytes!\n",
717 ca->dvbdev->adapter->num);
718 sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT;
719 status = -EIO;
720 goto exit;
721 }
722 } else {
723 if (bytes_read > ecount) {
724 pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the ecount size!\n",
725 ca->dvbdev->adapter->num);
726 status = -EIO;
727 goto exit;
728 }
729 }
730
731
732 for (i = 0; i < bytes_read; i++) {
733
734 status = ca->pub->read_cam_control(ca->pub, slot,
735 CTRLIF_DATA);
736 if (status < 0)
737 goto exit;
738
739
740 buf[i] = status;
741 }
742
743
744 status = ca->pub->read_cam_control(ca->pub, slot,
745 CTRLIF_STATUS);
746 if (status < 0)
747 goto exit;
748 if (status & STATUSREG_RE) {
749 sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT;
750 status = -EIO;
751 goto exit;
752 }
753 }
754
755
756
757
758
759 if (!ebuf) {
760 if (!sl->rx_buffer.data) {
761 status = -EIO;
762 goto exit;
763 }
764 dvb_ringbuffer_pkt_write(&sl->rx_buffer, buf, bytes_read);
765 } else {
766 memcpy(ebuf, buf, bytes_read);
767 }
768
769 dprintk("Received CA packet for slot %i connection id 0x%x last_frag:%i size:0x%x\n", slot,
770 buf[0], (buf[1] & 0x80) == 0, bytes_read);
771
772
773 if ((buf[1] & 0x80) == 0x00)
774 wake_up_interruptible(&ca->wait_queue);
775
776 status = bytes_read;
777
778exit:
779 return status;
780}
781
782
783
784
785
786
787
788
789
790
791
792
793
794static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot,
795 u8 *buf, int bytes_write)
796{
797 struct dvb_ca_slot *sl = &ca->slot_info[slot];
798 int status;
799 int i;
800
801 dprintk("%s\n", __func__);
802
803
804 if (bytes_write > sl->link_buf_size)
805 return -EINVAL;
806
807 if (ca->pub->write_data &&
808 (sl->slot_state != DVB_CA_SLOTSTATE_LINKINIT))
809 return ca->pub->write_data(ca->pub, slot, buf, bytes_write);
810
811
812
813
814
815
816
817 status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS);
818 if (status < 0)
819 goto exitnowrite;
820 if (status & (STATUSREG_DA | STATUSREG_RE)) {
821 if (status & STATUSREG_DA)
822 dvb_ca_en50221_thread_wakeup(ca);
823
824 status = -EAGAIN;
825 goto exitnowrite;
826 }
827
828
829 status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND,
830 IRQEN | CMDREG_HC);
831 if (status)
832 goto exit;
833
834
835 status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS);
836 if (status < 0)
837 goto exit;
838 if (!(status & STATUSREG_FR)) {
839
840 status = -EAGAIN;
841 goto exit;
842 }
843
844
845
846
847
848
849
850
851
852
853
854
855 status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS);
856 if (status < 0)
857 goto exit;
858
859 if (status & (STATUSREG_DA | STATUSREG_RE)) {
860 if (status & STATUSREG_DA)
861 dvb_ca_en50221_thread_wakeup(ca);
862
863 status = -EAGAIN;
864 goto exit;
865 }
866
867
868 status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH,
869 bytes_write >> 8);
870 if (status)
871 goto exit;
872 status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW,
873 bytes_write & 0xff);
874 if (status)
875 goto exit;
876
877
878 for (i = 0; i < bytes_write; i++) {
879 status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_DATA,
880 buf[i]);
881 if (status)
882 goto exit;
883 }
884
885
886 status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS);
887 if (status < 0)
888 goto exit;
889 if (status & STATUSREG_WE) {
890 sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT;
891 status = -EIO;
892 goto exit;
893 }
894 status = bytes_write;
895
896 dprintk("Wrote CA packet for slot %i, connection id 0x%x last_frag:%i size:0x%x\n", slot,
897 buf[0], (buf[1] & 0x80) == 0, bytes_write);
898
899exit:
900 ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN);
901
902exitnowrite:
903 return status;
904}
905
906
907
908
909
910
911
912
913
914
915static int dvb_ca_en50221_slot_shutdown(struct dvb_ca_private *ca, int slot)
916{
917 dprintk("%s\n", __func__);
918
919 ca->pub->slot_shutdown(ca->pub, slot);
920 ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE;
921
922
923
924
925
926 wake_up_interruptible(&ca->wait_queue);
927
928 dprintk("Slot %i shutdown\n", slot);
929
930
931 return 0;
932}
933
934
935
936
937
938
939
940
941void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot,
942 int change_type)
943{
944 struct dvb_ca_private *ca = pubca->private;
945 struct dvb_ca_slot *sl = &ca->slot_info[slot];
946
947 dprintk("CAMCHANGE IRQ slot:%i change_type:%i\n", slot, change_type);
948
949 switch (change_type) {
950 case DVB_CA_EN50221_CAMCHANGE_REMOVED:
951 case DVB_CA_EN50221_CAMCHANGE_INSERTED:
952 break;
953
954 default:
955 return;
956 }
957
958 sl->camchange_type = change_type;
959 atomic_inc(&sl->camchange_count);
960 dvb_ca_en50221_thread_wakeup(ca);
961}
962EXPORT_SYMBOL(dvb_ca_en50221_camchange_irq);
963
964
965
966
967
968
969
970void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221 *pubca, int slot)
971{
972 struct dvb_ca_private *ca = pubca->private;
973 struct dvb_ca_slot *sl = &ca->slot_info[slot];
974
975 dprintk("CAMREADY IRQ slot:%i\n", slot);
976
977 if (sl->slot_state == DVB_CA_SLOTSTATE_WAITREADY) {
978 sl->slot_state = DVB_CA_SLOTSTATE_VALIDATE;
979 dvb_ca_en50221_thread_wakeup(ca);
980 }
981}
982EXPORT_SYMBOL(dvb_ca_en50221_camready_irq);
983
984
985
986
987
988
989
990void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *pubca, int slot)
991{
992 struct dvb_ca_private *ca = pubca->private;
993 struct dvb_ca_slot *sl = &ca->slot_info[slot];
994 int flags;
995
996 dprintk("FR/DA IRQ slot:%i\n", slot);
997
998 switch (sl->slot_state) {
999 case DVB_CA_SLOTSTATE_LINKINIT:
1000 flags = ca->pub->read_cam_control(pubca, slot, CTRLIF_STATUS);
1001 if (flags & STATUSREG_DA) {
1002 dprintk("CAM supports DA IRQ\n");
1003 sl->da_irq_supported = 1;
1004 }
1005 break;
1006
1007 case DVB_CA_SLOTSTATE_RUNNING:
1008 if (ca->open)
1009 dvb_ca_en50221_thread_wakeup(ca);
1010 break;
1011 }
1012}
1013EXPORT_SYMBOL(dvb_ca_en50221_frda_irq);
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca)
1024{
1025 dprintk("%s\n", __func__);
1026
1027 ca->wakeup = 1;
1028 mb();
1029 wake_up_process(ca->thread);
1030}
1031
1032
1033
1034
1035
1036
1037static void dvb_ca_en50221_thread_update_delay(struct dvb_ca_private *ca)
1038{
1039 int delay;
1040 int curdelay = 100000000;
1041 int slot;
1042
1043
1044
1045
1046
1047 for (slot = 0; slot < ca->slot_count; slot++) {
1048 struct dvb_ca_slot *sl = &ca->slot_info[slot];
1049
1050 switch (sl->slot_state) {
1051 default:
1052 case DVB_CA_SLOTSTATE_NONE:
1053 delay = HZ * 60;
1054 if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE))
1055 delay = HZ * 5;
1056 break;
1057 case DVB_CA_SLOTSTATE_INVALID:
1058 delay = HZ * 60;
1059 if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE))
1060 delay = HZ / 10;
1061 break;
1062
1063 case DVB_CA_SLOTSTATE_UNINITIALISED:
1064 case DVB_CA_SLOTSTATE_WAITREADY:
1065 case DVB_CA_SLOTSTATE_VALIDATE:
1066 case DVB_CA_SLOTSTATE_WAITFR:
1067 case DVB_CA_SLOTSTATE_LINKINIT:
1068 delay = HZ / 10;
1069 break;
1070
1071 case DVB_CA_SLOTSTATE_RUNNING:
1072 delay = HZ * 60;
1073 if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE))
1074 delay = HZ / 10;
1075 if (ca->open) {
1076 if ((!sl->da_irq_supported) ||
1077 (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_DA)))
1078 delay = HZ / 10;
1079 }
1080 break;
1081 }
1082
1083 if (delay < curdelay)
1084 curdelay = delay;
1085 }
1086
1087 ca->delay = curdelay;
1088}
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099static int dvb_ca_en50221_poll_cam_gone(struct dvb_ca_private *ca, int slot)
1100{
1101 int changed = 0;
1102 int status;
1103
1104
1105
1106
1107
1108 if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) &&
1109 (ca->pub->poll_slot_status)) {
1110 status = ca->pub->poll_slot_status(ca->pub, slot, 0);
1111 if (!(status &
1112 DVB_CA_EN50221_POLL_CAM_PRESENT)) {
1113 ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE;
1114 dvb_ca_en50221_thread_update_delay(ca);
1115 changed = 1;
1116 }
1117 }
1118 return changed;
1119}
1120
1121
1122
1123
1124
1125
1126
1127static void dvb_ca_en50221_thread_state_machine(struct dvb_ca_private *ca,
1128 int slot)
1129{
1130 struct dvb_ca_slot *sl = &ca->slot_info[slot];
1131 int flags;
1132 int pktcount;
1133 void *rxbuf;
1134
1135 mutex_lock(&sl->slot_lock);
1136
1137
1138 while (dvb_ca_en50221_check_camstatus(ca, slot)) {
1139
1140 if (sl->slot_state != DVB_CA_SLOTSTATE_NONE)
1141 dvb_ca_en50221_slot_shutdown(ca, slot);
1142
1143
1144 if (sl->camchange_type == DVB_CA_EN50221_CAMCHANGE_INSERTED)
1145 sl->slot_state = DVB_CA_SLOTSTATE_UNINITIALISED;
1146
1147
1148 dvb_ca_en50221_thread_update_delay(ca);
1149 atomic_dec(&sl->camchange_count);
1150 }
1151
1152
1153 switch (sl->slot_state) {
1154 case DVB_CA_SLOTSTATE_NONE:
1155 case DVB_CA_SLOTSTATE_INVALID:
1156
1157 break;
1158
1159 case DVB_CA_SLOTSTATE_UNINITIALISED:
1160 sl->slot_state = DVB_CA_SLOTSTATE_WAITREADY;
1161 ca->pub->slot_reset(ca->pub, slot);
1162 sl->timeout = jiffies + (INIT_TIMEOUT_SECS * HZ);
1163 break;
1164
1165 case DVB_CA_SLOTSTATE_WAITREADY:
1166 if (time_after(jiffies, sl->timeout)) {
1167 pr_err("dvb_ca adaptor %d: PC card did not respond :(\n",
1168 ca->dvbdev->adapter->num);
1169 sl->slot_state = DVB_CA_SLOTSTATE_INVALID;
1170 dvb_ca_en50221_thread_update_delay(ca);
1171 break;
1172 }
1173
1174
1175
1176
1177 break;
1178
1179 case DVB_CA_SLOTSTATE_VALIDATE:
1180 if (dvb_ca_en50221_parse_attributes(ca, slot) != 0) {
1181 if (dvb_ca_en50221_poll_cam_gone(ca, slot))
1182 break;
1183
1184 pr_err("dvb_ca adapter %d: Invalid PC card inserted :(\n",
1185 ca->dvbdev->adapter->num);
1186 sl->slot_state = DVB_CA_SLOTSTATE_INVALID;
1187 dvb_ca_en50221_thread_update_delay(ca);
1188 break;
1189 }
1190 if (dvb_ca_en50221_set_configoption(ca, slot) != 0) {
1191 pr_err("dvb_ca adapter %d: Unable to initialise CAM :(\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 if (ca->pub->write_cam_control(ca->pub, slot,
1198 CTRLIF_COMMAND,
1199 CMDREG_RS) != 0) {
1200 pr_err("dvb_ca adapter %d: Unable to reset CAM IF\n",
1201 ca->dvbdev->adapter->num);
1202 sl->slot_state = DVB_CA_SLOTSTATE_INVALID;
1203 dvb_ca_en50221_thread_update_delay(ca);
1204 break;
1205 }
1206 dprintk("DVB CAM validated successfully\n");
1207
1208 sl->timeout = jiffies + (INIT_TIMEOUT_SECS * HZ);
1209 sl->slot_state = DVB_CA_SLOTSTATE_WAITFR;
1210 ca->wakeup = 1;
1211 break;
1212
1213 case DVB_CA_SLOTSTATE_WAITFR:
1214 if (time_after(jiffies, sl->timeout)) {
1215 pr_err("dvb_ca adapter %d: DVB CAM did not respond :(\n",
1216 ca->dvbdev->adapter->num);
1217 sl->slot_state = DVB_CA_SLOTSTATE_INVALID;
1218 dvb_ca_en50221_thread_update_delay(ca);
1219 break;
1220 }
1221
1222 flags = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS);
1223 if (flags & STATUSREG_FR) {
1224 sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT;
1225 ca->wakeup = 1;
1226 }
1227 break;
1228
1229 case DVB_CA_SLOTSTATE_LINKINIT:
1230 if (dvb_ca_en50221_link_init(ca, slot) != 0) {
1231 if (dvb_ca_en50221_poll_cam_gone(ca, slot))
1232 break;
1233
1234 pr_err("dvb_ca adapter %d: DVB CAM link initialisation failed :(\n",
1235 ca->dvbdev->adapter->num);
1236 sl->slot_state = DVB_CA_SLOTSTATE_UNINITIALISED;
1237 dvb_ca_en50221_thread_update_delay(ca);
1238 break;
1239 }
1240
1241 if (!sl->rx_buffer.data) {
1242 rxbuf = vmalloc(RX_BUFFER_SIZE);
1243 if (!rxbuf) {
1244 pr_err("dvb_ca adapter %d: Unable to allocate CAM rx buffer :(\n",
1245 ca->dvbdev->adapter->num);
1246 sl->slot_state = DVB_CA_SLOTSTATE_INVALID;
1247 dvb_ca_en50221_thread_update_delay(ca);
1248 break;
1249 }
1250 dvb_ringbuffer_init(&sl->rx_buffer, rxbuf,
1251 RX_BUFFER_SIZE);
1252 }
1253
1254 ca->pub->slot_ts_enable(ca->pub, slot);
1255 sl->slot_state = DVB_CA_SLOTSTATE_RUNNING;
1256 dvb_ca_en50221_thread_update_delay(ca);
1257 pr_info("dvb_ca adapter %d: DVB CAM detected and initialised successfully\n",
1258 ca->dvbdev->adapter->num);
1259 break;
1260
1261 case DVB_CA_SLOTSTATE_RUNNING:
1262 if (!ca->open)
1263 break;
1264
1265
1266 pktcount = 0;
1267 while (dvb_ca_en50221_read_data(ca, slot, NULL, 0) > 0) {
1268 if (!ca->open)
1269 break;
1270
1271
1272
1273
1274
1275 if (dvb_ca_en50221_check_camstatus(ca, slot)) {
1276
1277
1278
1279
1280 ca->wakeup = 1;
1281 break;
1282 }
1283
1284
1285 if (++pktcount >= MAX_RX_PACKETS_PER_ITERATION) {
1286
1287
1288
1289
1290 ca->wakeup = 1;
1291 break;
1292 }
1293 }
1294 break;
1295 }
1296
1297 mutex_unlock(&sl->slot_lock);
1298}
1299
1300
1301
1302
1303
1304static int dvb_ca_en50221_thread(void *data)
1305{
1306 struct dvb_ca_private *ca = data;
1307 int slot;
1308
1309 dprintk("%s\n", __func__);
1310
1311
1312 dvb_ca_en50221_thread_update_delay(ca);
1313
1314
1315 while (!kthread_should_stop()) {
1316
1317 if (!ca->wakeup) {
1318 set_current_state(TASK_INTERRUPTIBLE);
1319 schedule_timeout(ca->delay);
1320 if (kthread_should_stop())
1321 return 0;
1322 }
1323 ca->wakeup = 0;
1324
1325
1326 for (slot = 0; slot < ca->slot_count; slot++)
1327 dvb_ca_en50221_thread_state_machine(ca, slot);
1328 }
1329
1330 return 0;
1331}
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346static int dvb_ca_en50221_io_do_ioctl(struct file *file,
1347 unsigned int cmd, void *parg)
1348{
1349 struct dvb_device *dvbdev = file->private_data;
1350 struct dvb_ca_private *ca = dvbdev->priv;
1351 int err = 0;
1352 int slot;
1353
1354 dprintk("%s\n", __func__);
1355
1356 if (mutex_lock_interruptible(&ca->ioctl_mutex))
1357 return -ERESTARTSYS;
1358
1359 switch (cmd) {
1360 case CA_RESET:
1361 for (slot = 0; slot < ca->slot_count; slot++) {
1362 struct dvb_ca_slot *sl = &ca->slot_info[slot];
1363
1364 mutex_lock(&sl->slot_lock);
1365 if (sl->slot_state != DVB_CA_SLOTSTATE_NONE) {
1366 dvb_ca_en50221_slot_shutdown(ca, slot);
1367 if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)
1368 dvb_ca_en50221_camchange_irq(ca->pub,
1369 slot,
1370 DVB_CA_EN50221_CAMCHANGE_INSERTED);
1371 }
1372 mutex_unlock(&sl->slot_lock);
1373 }
1374 ca->next_read_slot = 0;
1375 dvb_ca_en50221_thread_wakeup(ca);
1376 break;
1377
1378 case CA_GET_CAP: {
1379 struct ca_caps *caps = parg;
1380
1381 caps->slot_num = ca->slot_count;
1382 caps->slot_type = CA_CI_LINK;
1383 caps->descr_num = 0;
1384 caps->descr_type = 0;
1385 break;
1386 }
1387
1388 case CA_GET_SLOT_INFO: {
1389 struct ca_slot_info *info = parg;
1390 struct dvb_ca_slot *sl;
1391
1392 slot = info->num;
1393 if ((slot > ca->slot_count) || (slot < 0)) {
1394 err = -EINVAL;
1395 goto out_unlock;
1396 }
1397
1398 info->type = CA_CI_LINK;
1399 info->flags = 0;
1400 sl = &ca->slot_info[slot];
1401 if ((sl->slot_state != DVB_CA_SLOTSTATE_NONE) &&
1402 (sl->slot_state != DVB_CA_SLOTSTATE_INVALID)) {
1403 info->flags = CA_CI_MODULE_PRESENT;
1404 }
1405 if (sl->slot_state == DVB_CA_SLOTSTATE_RUNNING)
1406 info->flags |= CA_CI_MODULE_READY;
1407 break;
1408 }
1409
1410 default:
1411 err = -EINVAL;
1412 break;
1413 }
1414
1415out_unlock:
1416 mutex_unlock(&ca->ioctl_mutex);
1417 return err;
1418}
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429static long dvb_ca_en50221_io_ioctl(struct file *file,
1430 unsigned int cmd, unsigned long arg)
1431{
1432 return dvb_usercopy(file, cmd, arg, dvb_ca_en50221_io_do_ioctl);
1433}
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445static ssize_t dvb_ca_en50221_io_write(struct file *file,
1446 const char __user *buf, size_t count,
1447 loff_t *ppos)
1448{
1449 struct dvb_device *dvbdev = file->private_data;
1450 struct dvb_ca_private *ca = dvbdev->priv;
1451 struct dvb_ca_slot *sl;
1452 u8 slot, connection_id;
1453 int status;
1454 u8 fragbuf[HOST_LINK_BUF_SIZE];
1455 int fragpos = 0;
1456 int fraglen;
1457 unsigned long timeout;
1458 int written;
1459
1460 dprintk("%s\n", __func__);
1461
1462
1463
1464
1465
1466 if (count < 2)
1467 return -EINVAL;
1468
1469
1470 if (copy_from_user(&slot, buf, 1))
1471 return -EFAULT;
1472 if (copy_from_user(&connection_id, buf + 1, 1))
1473 return -EFAULT;
1474 buf += 2;
1475 count -= 2;
1476
1477 if (slot >= ca->slot_count)
1478 return -EINVAL;
1479 sl = &ca->slot_info[slot];
1480
1481
1482 if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING)
1483 return -EINVAL;
1484
1485
1486 while (fragpos < count) {
1487 fraglen = sl->link_buf_size - 2;
1488 if (fraglen < 0)
1489 break;
1490 if (fraglen > HOST_LINK_BUF_SIZE - 2)
1491 fraglen = HOST_LINK_BUF_SIZE - 2;
1492 if ((count - fragpos) < fraglen)
1493 fraglen = count - fragpos;
1494
1495 fragbuf[0] = connection_id;
1496 fragbuf[1] = ((fragpos + fraglen) < count) ? 0x80 : 0x00;
1497 status = copy_from_user(fragbuf + 2, buf + fragpos, fraglen);
1498 if (status) {
1499 status = -EFAULT;
1500 goto exit;
1501 }
1502
1503 timeout = jiffies + HZ / 2;
1504 written = 0;
1505 while (!time_after(jiffies, timeout)) {
1506
1507
1508
1509
1510 if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) {
1511 status = -EIO;
1512 goto exit;
1513 }
1514
1515 mutex_lock(&sl->slot_lock);
1516 status = dvb_ca_en50221_write_data(ca, slot, fragbuf,
1517 fraglen + 2);
1518 mutex_unlock(&sl->slot_lock);
1519 if (status == (fraglen + 2)) {
1520 written = 1;
1521 break;
1522 }
1523 if (status != -EAGAIN)
1524 goto exit;
1525
1526 usleep_range(1000, 1100);
1527 }
1528 if (!written) {
1529 status = -EIO;
1530 goto exit;
1531 }
1532
1533 fragpos += fraglen;
1534 }
1535 status = count + 2;
1536
1537exit:
1538 return status;
1539}
1540
1541
1542
1543
1544static int dvb_ca_en50221_io_read_condition(struct dvb_ca_private *ca,
1545 int *result, int *_slot)
1546{
1547 int slot;
1548 int slot_count = 0;
1549 int idx;
1550 size_t fraglen;
1551 int connection_id = -1;
1552 int found = 0;
1553 u8 hdr[2];
1554
1555 slot = ca->next_read_slot;
1556 while ((slot_count < ca->slot_count) && (!found)) {
1557 struct dvb_ca_slot *sl = &ca->slot_info[slot];
1558
1559 if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING)
1560 goto nextslot;
1561
1562 if (!sl->rx_buffer.data)
1563 return 0;
1564
1565 idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, -1, &fraglen);
1566 while (idx != -1) {
1567 dvb_ringbuffer_pkt_read(&sl->rx_buffer, idx, 0, hdr, 2);
1568 if (connection_id == -1)
1569 connection_id = hdr[0];
1570 if ((hdr[0] == connection_id) &&
1571 ((hdr[1] & 0x80) == 0)) {
1572 *_slot = slot;
1573 found = 1;
1574 break;
1575 }
1576
1577 idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, idx,
1578 &fraglen);
1579 }
1580
1581nextslot:
1582 slot = (slot + 1) % ca->slot_count;
1583 slot_count++;
1584 }
1585
1586 ca->next_read_slot = slot;
1587 return found;
1588}
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user *buf,
1601 size_t count, loff_t *ppos)
1602{
1603 struct dvb_device *dvbdev = file->private_data;
1604 struct dvb_ca_private *ca = dvbdev->priv;
1605 struct dvb_ca_slot *sl;
1606 int status;
1607 int result = 0;
1608 u8 hdr[2];
1609 int slot;
1610 int connection_id = -1;
1611 size_t idx, idx2;
1612 int last_fragment = 0;
1613 size_t fraglen;
1614 int pktlen;
1615 int dispose = 0;
1616
1617 dprintk("%s\n", __func__);
1618
1619
1620
1621
1622
1623 if (count < 2)
1624 return -EINVAL;
1625
1626
1627 status = dvb_ca_en50221_io_read_condition(ca, &result, &slot);
1628 if (status == 0) {
1629
1630 if (file->f_flags & O_NONBLOCK)
1631 return -EWOULDBLOCK;
1632
1633
1634 status = wait_event_interruptible(ca->wait_queue,
1635 dvb_ca_en50221_io_read_condition
1636 (ca, &result, &slot));
1637 }
1638 if ((status < 0) || (result < 0)) {
1639 if (result)
1640 return result;
1641 return status;
1642 }
1643
1644 sl = &ca->slot_info[slot];
1645 idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, -1, &fraglen);
1646 pktlen = 2;
1647 do {
1648 if (idx == -1) {
1649 pr_err("dvb_ca adapter %d: BUG: read packet ended before last_fragment encountered\n",
1650 ca->dvbdev->adapter->num);
1651 status = -EIO;
1652 goto exit;
1653 }
1654
1655 dvb_ringbuffer_pkt_read(&sl->rx_buffer, idx, 0, hdr, 2);
1656 if (connection_id == -1)
1657 connection_id = hdr[0];
1658 if (hdr[0] == connection_id) {
1659 if (pktlen < count) {
1660 if ((pktlen + fraglen - 2) > count)
1661 fraglen = count - pktlen;
1662 else
1663 fraglen -= 2;
1664
1665 status =
1666 dvb_ringbuffer_pkt_read_user(&sl->rx_buffer,
1667 idx, 2,
1668 buf + pktlen,
1669 fraglen);
1670 if (status < 0)
1671 goto exit;
1672
1673 pktlen += fraglen;
1674 }
1675
1676 if ((hdr[1] & 0x80) == 0)
1677 last_fragment = 1;
1678 dispose = 1;
1679 }
1680
1681 idx2 = dvb_ringbuffer_pkt_next(&sl->rx_buffer, idx, &fraglen);
1682 if (dispose)
1683 dvb_ringbuffer_pkt_dispose(&sl->rx_buffer, idx);
1684 idx = idx2;
1685 dispose = 0;
1686 } while (!last_fragment);
1687
1688 hdr[0] = slot;
1689 hdr[1] = connection_id;
1690 status = copy_to_user(buf, hdr, 2);
1691 if (status) {
1692 status = -EFAULT;
1693 goto exit;
1694 }
1695 status = pktlen;
1696
1697exit:
1698 return status;
1699}
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709static int dvb_ca_en50221_io_open(struct inode *inode, struct file *file)
1710{
1711 struct dvb_device *dvbdev = file->private_data;
1712 struct dvb_ca_private *ca = dvbdev->priv;
1713 int err;
1714 int i;
1715
1716 dprintk("%s\n", __func__);
1717
1718 if (!try_module_get(ca->pub->owner))
1719 return -EIO;
1720
1721 err = dvb_generic_open(inode, file);
1722 if (err < 0) {
1723 module_put(ca->pub->owner);
1724 return err;
1725 }
1726
1727 for (i = 0; i < ca->slot_count; i++) {
1728 struct dvb_ca_slot *sl = &ca->slot_info[i];
1729
1730 if (sl->slot_state == DVB_CA_SLOTSTATE_RUNNING) {
1731 if (!sl->rx_buffer.data) {
1732
1733
1734
1735
1736
1737 dvb_ringbuffer_flush(&sl->rx_buffer);
1738 }
1739 }
1740 }
1741
1742 ca->open = 1;
1743 dvb_ca_en50221_thread_update_delay(ca);
1744 dvb_ca_en50221_thread_wakeup(ca);
1745
1746 dvb_ca_private_get(ca);
1747
1748 return 0;
1749}
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759static int dvb_ca_en50221_io_release(struct inode *inode, struct file *file)
1760{
1761 struct dvb_device *dvbdev = file->private_data;
1762 struct dvb_ca_private *ca = dvbdev->priv;
1763 int err;
1764
1765 dprintk("%s\n", __func__);
1766
1767
1768 ca->open = 0;
1769 dvb_ca_en50221_thread_update_delay(ca);
1770
1771 err = dvb_generic_release(inode, file);
1772
1773 module_put(ca->pub->owner);
1774
1775 dvb_ca_private_put(ca);
1776
1777 return err;
1778}
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788static __poll_t dvb_ca_en50221_io_poll(struct file *file, poll_table *wait)
1789{
1790 struct dvb_device *dvbdev = file->private_data;
1791 struct dvb_ca_private *ca = dvbdev->priv;
1792 __poll_t mask = 0;
1793 int slot;
1794 int result = 0;
1795
1796 dprintk("%s\n", __func__);
1797
1798 if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1)
1799 mask |= EPOLLIN;
1800
1801
1802 if (mask)
1803 return mask;
1804
1805
1806 poll_wait(file, &ca->wait_queue, wait);
1807
1808 if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1)
1809 mask |= EPOLLIN;
1810
1811 return mask;
1812}
1813
1814static const struct file_operations dvb_ca_fops = {
1815 .owner = THIS_MODULE,
1816 .read = dvb_ca_en50221_io_read,
1817 .write = dvb_ca_en50221_io_write,
1818 .unlocked_ioctl = dvb_ca_en50221_io_ioctl,
1819 .open = dvb_ca_en50221_io_open,
1820 .release = dvb_ca_en50221_io_release,
1821 .poll = dvb_ca_en50221_io_poll,
1822 .llseek = noop_llseek,
1823};
1824
1825static const struct dvb_device dvbdev_ca = {
1826 .priv = NULL,
1827 .users = 1,
1828 .readers = 1,
1829 .writers = 1,
1830#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
1831 .name = "dvb-ca-en50221",
1832#endif
1833 .fops = &dvb_ca_fops,
1834};
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter,
1850 struct dvb_ca_en50221 *pubca, int flags, int slot_count)
1851{
1852 int ret;
1853 struct dvb_ca_private *ca = NULL;
1854 int i;
1855
1856 dprintk("%s\n", __func__);
1857
1858 if (slot_count < 1)
1859 return -EINVAL;
1860
1861
1862 ca = kzalloc(sizeof(*ca), GFP_KERNEL);
1863 if (!ca) {
1864 ret = -ENOMEM;
1865 goto exit;
1866 }
1867 kref_init(&ca->refcount);
1868 ca->pub = pubca;
1869 ca->flags = flags;
1870 ca->slot_count = slot_count;
1871 ca->slot_info = kcalloc(slot_count, sizeof(struct dvb_ca_slot),
1872 GFP_KERNEL);
1873 if (!ca->slot_info) {
1874 ret = -ENOMEM;
1875 goto free_ca;
1876 }
1877 init_waitqueue_head(&ca->wait_queue);
1878 ca->open = 0;
1879 ca->wakeup = 0;
1880 ca->next_read_slot = 0;
1881 pubca->private = ca;
1882
1883
1884 ret = dvb_register_device(dvb_adapter, &ca->dvbdev, &dvbdev_ca, ca,
1885 DVB_DEVICE_CA, 0);
1886 if (ret)
1887 goto free_slot_info;
1888
1889
1890 for (i = 0; i < slot_count; i++) {
1891 struct dvb_ca_slot *sl = &ca->slot_info[i];
1892
1893 memset(sl, 0, sizeof(struct dvb_ca_slot));
1894 sl->slot_state = DVB_CA_SLOTSTATE_NONE;
1895 atomic_set(&sl->camchange_count, 0);
1896 sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED;
1897 mutex_init(&sl->slot_lock);
1898 }
1899
1900 mutex_init(&ca->ioctl_mutex);
1901
1902 if (signal_pending(current)) {
1903 ret = -EINTR;
1904 goto unregister_device;
1905 }
1906 mb();
1907
1908
1909 ca->thread = kthread_run(dvb_ca_en50221_thread, ca, "kdvb-ca-%i:%i",
1910 ca->dvbdev->adapter->num, ca->dvbdev->id);
1911 if (IS_ERR(ca->thread)) {
1912 ret = PTR_ERR(ca->thread);
1913 pr_err("dvb_ca_init: failed to start kernel_thread (%d)\n",
1914 ret);
1915 goto unregister_device;
1916 }
1917 return 0;
1918
1919unregister_device:
1920 dvb_unregister_device(ca->dvbdev);
1921free_slot_info:
1922 kfree(ca->slot_info);
1923free_ca:
1924 kfree(ca);
1925exit:
1926 pubca->private = NULL;
1927 return ret;
1928}
1929EXPORT_SYMBOL(dvb_ca_en50221_init);
1930
1931
1932
1933
1934
1935
1936void dvb_ca_en50221_release(struct dvb_ca_en50221 *pubca)
1937{
1938 struct dvb_ca_private *ca = pubca->private;
1939 int i;
1940
1941 dprintk("%s\n", __func__);
1942
1943
1944 kthread_stop(ca->thread);
1945
1946 for (i = 0; i < ca->slot_count; i++)
1947 dvb_ca_en50221_slot_shutdown(ca, i);
1948
1949 dvb_remove_device(ca->dvbdev);
1950 dvb_ca_private_put(ca);
1951 pubca->private = NULL;
1952}
1953EXPORT_SYMBOL(dvb_ca_en50221_release);
1954