aboutsummaryrefslogtreecommitdiff
path: root/drivers/media/dvb/bt8xx/dst_ca.c
blob: 7ed74dfc6b928d3858b3084a1567a218e5852209 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
/*
	CA-driver for TwinHan DST Frontend/Card

	Copyright (C) 2004, 2005 Manu Abraham (manu@kromtek.com)

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <linux/string.h>
#include <linux/dvb/ca.h>
#include "dvbdev.h"
#include "dvb_frontend.h"
#include "dst_ca.h"
#include "dst_common.h"

#define DST_CA_ERROR		0
#define DST_CA_NOTICE		1
#define DST_CA_INFO		2
#define DST_CA_DEBUG		3

#define dprintk(x, y, z, format, arg...) do {						\
	if (z) {									\
		if	((x > DST_CA_ERROR) && (x > y))					\
			printk(KERN_ERR "%s: " format "\n", __func__ , ##arg);	\
		else if	((x > DST_CA_NOTICE) && (x > y))				\
			printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg);	\
		else if ((x > DST_CA_INFO) && (x > y))					\
			printk(KERN_INFO "%s: " format "\n", __func__ , ##arg);	\
		else if ((x > DST_CA_DEBUG) && (x > y))					\
			printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg);	\
	} else {									\
		if (x > y)								\
			printk(format, ## arg);						\
	}										\
} while(0)


static unsigned int verbose = 5;
module_param(verbose, int, 0644);
MODULE_PARM_DESC(verbose, "verbose startup messages, default is 1 (yes)");

/*	Need some more work	*/
static int ca_set_slot_descr(void)
{
	/*	We could make this more graceful ?	*/
	return -EOPNOTSUPP;
}

/*	Need some more work	*/
static int ca_set_pid(void)
{
	/*	We could make this more graceful ?	*/
	return -EOPNOTSUPP;
}

static void put_command_and_length(u8 *data, int command, int length)
{
	data[0] = (command >> 16) & 0xff;
	data[1] = (command >> 8) & 0xff;
	data[2] = command & 0xff;
	data[3] = length;
}

static void put_checksum(u8 *check_string, int length)
{
	dprintk(verbose, DST_CA_DEBUG, 1, " Computing string checksum.");
	dprintk(verbose, DST_CA_DEBUG, 1, "  -> string length : 0x%02x", length);
	check_string[length] = dst_check_sum (check_string, length);
	dprintk(verbose, DST_CA_DEBUG, 1, "  -> checksum      : 0x%02x", check_string[length]);
}

static int dst_ci_command(struct dst_state* state, u8 * data, u8 *ca_string, u8 len, int read)
{
	u8 reply;

	mutex_lock(&state->dst_mutex);
	dst_comm_init(state);
	msleep(65);

	if (write_dst(state, data, len)) {
		dprintk(verbose, DST_CA_INFO, 1, " Write not successful, trying to recover");
		dst_error_recovery(state);
		goto error;
	}
	if ((dst_pio_disable(state)) < 0) {
		dprintk(verbose, DST_CA_ERROR, 1, " DST PIO disable failed.");
		goto error;
	}
	if (read_dst(state, &reply, GET_ACK) < 0) {
		dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
		dst_error_recovery(state);
		goto error;
	}
	if (read) {
		if (! dst_wait_dst_ready(state, LONG_DELAY)) {
			dprintk(verbose, DST_CA_NOTICE, 1, " 8820 not ready");
			goto error;
		}
		if (read_dst(state, ca_string, 128) < 0) {	/*	Try to make this dynamic	*/
			dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
			dst_error_recovery(state);
			goto error;
		}
	}
	mutex_unlock(&state->dst_mutex);
	return 0;

error:
	mutex_unlock(&state->dst_mutex);
	return -EIO;
}


static int dst_put_ci(struct dst_state *state, u8 *data, int len, u8 *ca_string, int read)
{
	u8 dst_ca_comm_err = 0;

	while (dst_ca_comm_err < RETRIES) {
		dprintk(verbose, DST_CA_NOTICE, 1, " Put Command");
		if (dst_ci_command(state, data, ca_string, len, read)) {	// If error
			dst_error_recovery(state);
			dst_ca_comm_err++; // work required here.
		} else {
			break;
		}
	}

	if(dst_ca_comm_err == RETRIES)
		return -1;

	return 0;
}



static int ca_get_app_info(struct dst_state *state)
{
	int length, str_length;
	static u8 command[8] = {0x07, 0x40, 0x01, 0x00, 0x01, 0x00, 0x00, 0xff};

	put_checksum(&command[0], command[0]);
	if ((dst_put_ci(state, command, sizeof(command), state->messages, GET_REPLY)) < 0) {
		dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
		return -1;
	}
	dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
	dprintk(verbose, DST_CA_INFO, 1, " ================================ CI Module Application Info ======================================");
	dprintk(verbose, DST_CA_INFO, 1, " Application Type=[%d], Application Vendor=[%d], Vendor Code=[%d]\n%s: Application info=[%s]",
		state->messages[7], (state->messages[8] << 8) | state->messages[9],
		(state->messages[10] << 8) | state->messages[11], __func__, (char *)(&state->messages[12]));
	dprintk(verbose, DST_CA_INFO, 1, " ==================================================================================================");

	// Transform dst message to correct application_info message
	length = state->messages[5];
	str_length = length - 6;
	if (str_length < 0) {
		str_length = 0;
		dprintk(verbose, DST_CA_ERROR, 1, "Invalid string length returned in ca_get_app_info(). Recovering.");
	}

	// First, the command and length fields
	put_command_and_length(&state->messages[0], CA_APP_INFO, length);

	// Copy application_type, application_manufacturer and manufacturer_code
	memcpy(&state->messages[4], &state->messages[7], 5);

	// Set string length and copy string
	state->messages[9] = str_length;
	memcpy(&state->messages[10], &state->messages[12], str_length);

	return 0;
}

static int ca_get_ca_info(struct dst_state *state)
{
	int srcPtr, dstPtr, i, num_ids;
	static u8 slot_command[8] = {0x07, 0x40, 0x00, 0x00, 0x02, 0x00, 0x00, 0xff};
	const int in_system_id_pos = 8, out_system_id_pos = 4, in_num_ids_pos = 7;

	put_checksum(&slot_command[0], slot_command[0]);
	if ((dst_put_ci(state, slot_command, sizeof (slot_command), state->messages, GET_REPLY)) < 0) {
		dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
		return -1;
	}
	dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");

	// Print raw data
	dprintk(verbose, DST_CA_INFO, 0, " DST data = [");
	for (i = 0; i < state->messages[0] + 1; i++) {
		dprintk(verbose, DST_CA_INFO, 0, " 0x%02x", state->messages[i]);
	}
	dprintk(verbose, DST_CA_INFO, 0, "]\n");

	// Set the command and length of the output
	num_ids = state->messages[in_num_ids_pos];
	if (num_ids >= 100) {
		num_ids = 100;
		dprintk(verbose, DST_CA_ERROR, 1, "Invalid number of ids (>100). Recovering.");
	}
	put_command_and_length(&state->messages[0], CA_INFO, num_ids * 2);

	dprintk(verbose, DST_CA_INFO, 0, " CA_INFO = [");
	srcPtr = in_system_id_pos;
	dstPtr = out_system_id_pos;
	for(i = 0; i < num_ids; i++) {
		dprintk(verbose, DST_CA_INFO, 0, " 0x%02x%02x", state->messages[srcPtr + 0], state->messages[srcPtr + 1]);
		// Append to output
		state->messages[dstPtr + 0] = state->messages[srcPtr + 0];
		state->messages[dstPtr + 1] = state->messages[srcPtr + 1];
		srcPtr += 2;
		dstPtr += 2;
	}
	dprintk(verbose, DST_CA_INFO, 0, "]\n");

	return 0;
}

static int ca_get_slot_caps(struct dst_state *state, struct ca_caps *p_ca_caps, void __user *arg)
{
	int i;
	u8 slot_cap[256];
	static u8 slot_command[8] = {0x07, 0x40, 0x02, 0x00, 0x02, 0x00, 0x00, 0xff};

	put_checksum(&slot_command[0], slot_command[0]);
	if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_cap, GET_REPLY)) < 0) {
		dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
		return -1;
	}
	dprintk(verbose, DST_CA_NOTICE, 1, " -->dst_put_ci SUCCESS !");

	/*	Will implement the rest soon		*/

	dprintk(verbose, DST_CA_INFO, 1, " Slot cap = [%d]", slot_cap[7]);
	dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
	for (i = 0; i < slot_cap[0] + 1; i++)
		dprintk(verbose, DST_CA_INFO, 0, " %d", slot_cap[i]);
	dprintk(verbose, DST_CA_INFO, 0, "\n");

	p_ca_caps->slot_num = 1;
	p_ca_caps->slot_type = 1;
	p_ca_caps->descr_num = slot_cap[7];
	p_ca_caps->descr_type = 1;

	if (copy_to_user(arg, p_ca_caps, sizeof (struct ca_caps)))
		return -EFAULT;

	return 0;
}

/*	Need some more work	*/
static int ca_get_slot_descr(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
{
	return -EOPNOTSUPP;
}


static int ca_get_slot_info(struct dst_state *state, struct ca_slot_info *p_ca_slot_info, void __user *arg)
{
	int i;
	static u8 slot_command[8] = {0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff};

	u8 *slot_info = state->messages;

	put_checksum(&slot_command[0], 7);
	if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_info, GET_REPLY)) < 0) {
		dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
		return -1;
	}
	dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");

	/*	Will implement the rest soon		*/

	dprintk(verbose, DST_CA_INFO, 1, " Slot info = [%d]", slot_info[3]);
	dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
	for (i = 0; i < 8; i++)
		dprintk(verbose, DST_CA_INFO, 0, " %d", slot_info[i]);
	dprintk(verbose, DST_CA_INFO, 0, "\n");

	if (slot_info[4] & 0x80) {
		p_ca_slot_info->flags = CA_CI_MODULE_PRESENT;
		p_ca_slot_info->num = 1;
		p_ca_slot_info->type = CA_CI;
	} else if (slot_info[4] & 0x40) {
		p_ca_slot_info->flags = CA_CI_MODULE_READY;
		p_ca_slot_info->num = 1;
		p_ca_slot_info->type = CA_CI;
	} else
		p_ca_slot_info->flags = 0;

	if (copy_to_user(arg, p_ca_slot_info, sizeof (struct ca_slot_info)))
		return -EFAULT;

	return 0;
}


static int ca_get_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
{
	u8 i = 0;
	u32 command = 0;

	if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg)))
		return -EFAULT;

	if (p_ca_message->msg) {
		dprintk(verbose, DST_CA_NOTICE, 1, " Message = [%02x %02x %02x]", p_ca_message->msg[0], p_ca_message->msg[1], p_ca_message->msg[2]);

		for (i = 0; i < 3; i++) {
			command = command | p_ca_message->msg[i];
			if (i < 2)
				command = command << 8;
		}
		dprintk(verbose, DST_CA_NOTICE, 1, " Command=[0x%x]", command);

		switch (command) {
		case CA_APP_INFO:
			memcpy(p_ca_message->msg, state->messages, 128);
			if (copy_to_user(arg, p_ca_message, sizeof (struct ca_msg)) )
				return -EFAULT;
			break;
		case CA_INFO:
			memcpy(p_ca_message->msg, state->messages, 128);
			if (copy_to_user(arg, p_ca_message, sizeof (struct ca_msg)) )
				return -EFAULT;
			break;
		}
	}

	return 0;
}

static int handle_dst_tag(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u32 length)
{
	if (state->dst_hw_cap & DST_TYPE_HAS_SESSION) {
		hw_buffer->msg[2] = p_ca_message->msg[1];	/*	MSB	*/
		hw_buffer->msg[3] = p_ca_message->msg[2];	/*	LSB	*/
	} else {
		if (length > 247) {
			dprintk(verbose, DST_CA_ERROR, 1, " Message too long ! *** Bailing Out *** !");
			return -1;
		}
		hw_buffer->msg[0] = (length & 0xff) + 7;
		hw_buffer->msg[1] = 0x40;
		hw_buffer->msg[2] = 0x03;
		hw_buffer->msg[3] = 0x00;
		hw_buffer->msg[4] = 0x03;
		hw_buffer->msg[5] = length & 0xff;
		hw_buffer->msg[6] = 0x00;

		/*
		 *	Need to compute length for EN50221 section 8.3.2, for the time being
		 *	assuming 8.3.2 is not applicable
		 */
		memcpy(&hw_buffer->msg[7], &p_ca_message->msg[4], length);
	}

	return 0;
}

static int write_to_8820(struct dst_state *state, struct ca_msg *hw_buffer, u8 length, u8 reply)
{
	if ((dst_put_ci(state, hw_buffer->msg, length, hw_buffer->msg, reply)) < 0) {
		dprintk(verbose, DST_CA_ERROR, 1, " DST-CI Command failed.");
		dprintk(verbose, DST_CA_NOTICE, 1, " Resetting DST.");
		rdc_reset_state(state);
		return -1;
	}
	dprintk(verbose, DST_CA_NOTICE, 1, " DST-CI Command success.");

	return 0;
}

static u32 asn_1_decode(u8 *asn_1_array)
{
	u8 length_field = 0, word_count = 0, count = 0;
	u32 length = 0;

	length_field = asn_1_array[0];
	dprintk(verbose, DST_CA_DEBUG, 1, " Length field=[%02x]", length_field);
	if (length_field < 0x80) {
		length = length_field & 0x7f;
		dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%02x]\n", length);
	} else {
		word_count = length_field & 0x7f;
		for (count = 0; count < word_count; count++) {
			length = length  << 8;
			length += asn_1_array[count + 1];
			dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%04x]", length);
		}
	}
	return length;
}

static int debug_string(u8 *msg, u32 length, u32 offset)
{
	u32 i;

	dprintk(verbose, DST_CA_DEBUG, 0, " String=[ ");
	for (i = offset; i < length; i++)
		dprintk(verbose, DST_CA_DEBUG, 0, "%02x ", msg[i]);
	dprintk(verbose, DST_CA_DEBUG, 0, "]\n");

	return 0;
}


static int ca_set_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u8 reply, u8 query)
{
	u32 length = 0;
	u8 tag_length = 8;

	length = asn_1_decode(&p_ca_message->msg[3]);
	dprintk(verbose, DST_CA_DEBUG, 1, " CA Message length=[%d]", length);
	debug_string(&p_ca_message->msg[4], length, 0); /*	length is excluding tag & length	*/

	memset(hw_buffer->msg, '\0', length);
	handle_dst_tag(state, p_ca_message, hw_buffer, length);
	put_checksum(hw_buffer->msg, hw_buffer->msg[0]);

	debug_string(hw_buffer->msg, (length + tag_length), 0); /*	tags too	*/
	write_to_8820(state, hw_buffer, (length + tag_length), reply);

	return 0;
}


/*	Board supports CA PMT reply ?		*/
static int dst_check_ca_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer)
{
	int ca_pmt_reply_test = 0;

	/*	Do test board			*/
	/*	Not there yet but soon		*/

	/*	CA PMT Reply capable		*/
	if (ca_pmt_reply_test) {
		if ((ca_set_pmt(state, p_ca_message, hw_buffer, 1, GET_REPLY)) < 0) {
			dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
			return -1;
		}

	/*	Process CA PMT Reply		*/
	/*	will implement soon		*/
		dprintk(verbose, DST_CA_ERROR, 1, " Not there yet");
	}
	/*	CA PMT Reply not capable	*/
	if (!ca_pmt_reply_test) {
		if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, NO_REPLY)) < 0) {
			dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
			return -1;
		}
		dprintk(verbose, DST_CA_NOTICE, 1, " ca_set_pmt.. success !");
	/*	put a dummy message		*/

	}
	return 0;
}

static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
{
	int i = 0;
	unsigned int ca_message_header_len;

	u32 command = 0;
	struct ca_msg *hw_buffer;
	int result = 0;

	if ((hw_buffer = kmalloc(sizeof (struct ca_msg), GFP_KERNEL)) == NULL) {
		dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
		return -ENOMEM;
	}
	dprintk(verbose, DST_CA_DEBUG, 1, " ");

	if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg))) {
		result = -EFAULT;
		goto free_mem_and_exit;
	}


	if (p_ca_message->msg) {
		ca_message_header_len = p_ca_message->length;	/*	Restore it back when you are done	*/
		/*	EN50221 tag	*/
		command = 0;

		for (i = 0; i < 3; i++) {
			command = command | p_ca_message->msg[i];
			if (i < 2)
				command = command << 8;
		}
		dprintk(verbose, DST_CA_DEBUG, 1, " Command=[0x%x]\n", command);

		switch (command) {
		case CA_PMT:
			dprintk(verbose, DST_CA_DEBUG, 1, "Command = SEND_CA_PMT");
			if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, 0)) < 0) {	// code simplification started
				dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT Failed !");
				result = -1;
				goto free_mem_and_exit;
			}
			dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT Success !");
			break;
		case CA_PMT_REPLY:
			dprintk(verbose, DST_CA_INFO, 1, "Command = CA_PMT_REPLY");
			/*      Have to handle the 2 basic types of cards here  */
			if ((dst_check_ca_pmt(state, p_ca_message, hw_buffer)) < 0) {
				dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT_REPLY Failed !");
				result = -1;
				goto free_mem_and_exit;
			}
			dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT_REPLY Success !");
			break;
		case CA_APP_INFO_ENQUIRY:		// only for debugging
			dprintk(verbose, DST_CA_INFO, 1, " Getting Cam Application information");

			if ((ca_get_app_info(state)) < 0) {
				dprintk(verbose, DST_CA_ERROR, 1, " -->CA_APP_INFO_ENQUIRY Failed !");
				result = -1;
				goto free_mem_and_exit;
			}
			dprintk(verbose, DST_CA_INFO, 1, " -->CA_APP_INFO_ENQUIRY Success !");
			break;
		case CA_INFO_ENQUIRY:
			dprintk(verbose, DST_CA_INFO, 1, " Getting CA Information");

			if ((ca_get_ca_info(state)) < 0) {
				dprintk(verbose, DST_CA_ERROR, 1, " -->CA_INFO_ENQUIRY Failed !");
				result = -1;
				goto free_mem_and_exit;
			}
			dprintk(verbose, DST_CA_INFO, 1, " -->CA_INFO_ENQUIRY Success !");
			break;
		}
	}
free_mem_and_exit:
	kfree (hw_buffer);

	return result;
}

static long dst_ca_ioctl(struct file *file, unsigned int cmd, unsigned long ioctl_arg)
{
	struct dvb_device *dvbdev;
	struct dst_state *state;
	struct ca_slot_info *p_ca_slot_info;
	struct ca_caps *p_ca_caps;
	struct ca_msg *p_ca_message;
	void __user *arg = (void __user *)ioctl_arg;
	int result = 0;

	lock_kernel();
	dvbdev = file->private_data;
	state = (struct dst_state *)dvbdev->priv;
	p_ca_message = kmalloc(sizeof (struct ca_msg), GFP_KERNEL);
	p_ca_slot_info = kmalloc(sizeof (struct ca_slot_info), GFP_KERNEL);
	p_ca_caps = kmalloc(sizeof (struct ca_caps), GFP_KERNEL);
	if (!p_ca_message || !p_ca_slot_info || !p_ca_caps) {
		dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
		result = -ENOMEM;
		goto free_mem_and_exit;
	}

	/*	We have now only the standard ioctl's, the driver is upposed to handle internals.	*/
	switch (cmd) {
	case CA_SEND_MSG:
		dprintk(verbose, DST_CA_INFO, 1, " Sending message");
		if ((ca_send_message(state, p_ca_message, arg)) < 0) {
			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SEND_MSG Failed !");
			result = -1;
			goto free_mem_and_exit;
		}
		break;
	case CA_GET_MSG:
		dprintk(verbose, DST_CA_INFO, 1, " Getting message");
		if ((ca_get_message(state, p_ca_message, arg)) < 0) {
			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_MSG Failed !");
			result = -1;
			goto free_mem_and_exit;
		}
		dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_MSG Success !");
		break;
	case CA_RESET:
		dprintk(verbose, DST_CA_ERROR, 1, " Resetting DST");
		dst_error_bailout(state);
		msleep(4000);
		break;
	case CA_GET_SLOT_INFO:
		dprintk(verbose, DST_CA_INFO, 1, " Getting Slot info");
		if ((ca_get_slot_info(state, p_ca_slot_info, arg)) < 0) {
			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_SLOT_INFO Failed !");
			result = -1;
			goto free_mem_and_exit;
		}
		dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_SLOT_INFO Success !");
		break;
	case CA_GET_CAP:
		dprintk(verbose, DST_CA_INFO, 1, " Getting Slot capabilities");
		if ((ca_get_slot_caps(state, p_ca_caps, arg)) < 0) {
			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_CAP Failed !");
			result = -1;
			goto free_mem_and_exit;
		}
		dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_CAP Success !");
		break;
	case CA_GET_DESCR_INFO:
		dprintk(verbose, DST_CA_INFO, 1, " Getting descrambler description");
		if ((ca_get_slot_descr(state, p_ca_message, arg)) < 0) {
			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_DESCR_INFO Failed !");
			result = -1;
			goto free_mem_and_exit;
		}
		dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_DESCR_INFO Success !");
		break;
	case CA_SET_DESCR:
		dprintk(verbose, DST_CA_INFO, 1, " Setting descrambler");
		if ((ca_set_slot_descr()) < 0) {
			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_DESCR Failed !");
			result = -1;
			goto free_mem_and_exit;
		}
		dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_DESCR Success !");
		break;
	case CA_SET_PID:
		dprintk(verbose, DST_CA_INFO, 1, " Setting PID");
		if ((ca_set_pid()) < 0) {
			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_PID Failed !");
			result = -1;
			goto free_mem_and_exit;
		}
		dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_PID Success !");
	default:
		result = -EOPNOTSUPP;
	};
 free_mem_and_exit:
	kfree (p_ca_message);
	kfree (p_ca_slot_info);
	kfree (p_ca_caps);

	unlock_kernel();
	return result;
}

static int dst_ca_open(struct inode *inode, struct file *file)
{
	dprintk(verbose, DST_CA_DEBUG, 1, " Device opened [%p] ", file);
	try_module_get(THIS_MODULE);

	return 0;
}

static int dst_ca_release(struct inode *inode, struct file *file)
{
	dprintk(verbose, DST_CA_DEBUG, 1, " Device closed.");
	module_put(THIS_MODULE);

	return 0;
}

static ssize_t dst_ca_read(struct file *file, char __user *buffer, size_t length, loff_t *offset)
{
	ssize_t bytes_read = 0;

	dprintk(verbose, DST_CA_DEBUG, 1, " Device read.");

	return bytes_read;
}

static ssize_t dst_ca_write(struct file *file, const char __user *buffer, size_t length, loff_t *offset)
{
	dprintk(verbose, DST_CA_DEBUG, 1, " Device write.");

	return 0;
}

static const struct file_operations dst_ca_fops = {
	.owner = THIS_MODULE,
	.unlocked_ioctl = dst_ca_ioctl,
	.open = dst_ca_open,
	.release = dst_ca_release,
	.read = dst_ca_read,
	.write = dst_ca_write,
	.llseek = noop_llseek,
};

static struct dvb_device dvbdev_ca = {
	.priv = NULL,
	.users = 1,
	.readers = 1,
	.writers = 1,
	.fops = &dst_ca_fops
};

struct dvb_device *dst_ca_attach(struct dst_state *dst, struct dvb_adapter *dvb_adapter)
{
	struct dvb_device *dvbdev;

	dprintk(verbose, DST_CA_ERROR, 1, "registering DST-CA device");
	if (dvb_register_device(dvb_adapter, &dvbdev, &dvbdev_ca, dst, DVB_DEVICE_CA) == 0) {
		dst->dst_ca = dvbdev;
		return dst->dst_ca;
	}

	return NULL;
}

EXPORT_SYMBOL(dst_ca_attach);

MODULE_DESCRIPTION("DST DVB-S/T/C Combo CA driver");
MODULE_AUTHOR("Manu Abraham");
MODULE_LICENSE("GPL");