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[PATCH] crc16: remove w1 specific comments.
[linux-2.6/verdex.git] / drivers / media / dvb / bt8xx / dst_ca.c
blob6776a592045f36d7468d18baedffc32b5740bfeb
1 /*
2 CA-driver for TwinHan DST Frontend/Card
3
4 Copyright (C) 2004, 2005 Manu Abraham (manu@kromtek.com)
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/init.h>
24 #include <linux/string.h>
25 #include <linux/dvb/ca.h>
26 #include "dvbdev.h"
27 #include "dvb_frontend.h"
28 #include "dst_ca.h"
29 #include "dst_common.h"
30
31 #define DST_CA_ERROR 0
32 #define DST_CA_NOTICE 1
33 #define DST_CA_INFO 2
34 #define DST_CA_DEBUG 3
35
36 #define dprintk(x, y, z, format, arg...) do { \
37 if (z) { \
38 if ((x > DST_CA_ERROR) && (x > y)) \
39 printk(KERN_ERR "%s: " format "\n", __FUNCTION__ , ##arg); \
40 else if ((x > DST_CA_NOTICE) && (x > y)) \
41 printk(KERN_NOTICE "%s: " format "\n", __FUNCTION__ , ##arg); \
42 else if ((x > DST_CA_INFO) && (x > y)) \
43 printk(KERN_INFO "%s: " format "\n", __FUNCTION__ , ##arg); \
44 else if ((x > DST_CA_DEBUG) && (x > y)) \
45 printk(KERN_DEBUG "%s: " format "\n", __FUNCTION__ , ##arg); \
46 } else { \
47 if (x > y) \
48 printk(format, ## arg); \
49 } \
50 } while(0)
51
52
53 static unsigned int verbose = 5;
54 module_param(verbose, int, 0644);
55 MODULE_PARM_DESC(verbose, "verbose startup messages, default is 1 (yes)");
56
57 /* Need some more work */
58 static int ca_set_slot_descr(void)
59 {
60 /* We could make this more graceful ? */
61 return -EOPNOTSUPP;
62 }
63
64 /* Need some more work */
65 static int ca_set_pid(void)
66 {
67 /* We could make this more graceful ? */
68 return -EOPNOTSUPP;
69 }
70
71
72 static int put_checksum(u8 *check_string, int length)
73 {
74 u8 i = 0, checksum = 0;
75
76 dprintk(verbose, DST_CA_DEBUG, 1, " ========================= Checksum calculation ===========================");
77 dprintk(verbose, DST_CA_DEBUG, 1, " String Length=[0x%02x]", length);
78 dprintk(verbose, DST_CA_DEBUG, 1, " String=[");
79
80 while (i < length) {
81 dprintk(verbose, DST_CA_DEBUG, 0, " %02x", check_string[i]);
82 checksum += check_string[i];
83 i++;
84 }
85 dprintk(verbose, DST_CA_DEBUG, 0, " ]\n");
86 dprintk(verbose, DST_CA_DEBUG, 1, "Sum=[%02x]\n", checksum);
87 check_string[length] = ~checksum + 1;
88 dprintk(verbose, DST_CA_DEBUG, 1, " Checksum=[%02x]", check_string[length]);
89 dprintk(verbose, DST_CA_DEBUG, 1, " ==========================================================================");
90
91 return 0;
92 }
93
94 static int dst_ci_command(struct dst_state* state, u8 * data, u8 *ca_string, u8 len, int read)
95 {
96 u8 reply;
97
98 dst_comm_init(state);
99 msleep(65);
100
101 if (write_dst(state, data, len)) {
102 dprintk(verbose, DST_CA_INFO, 1, " Write not successful, trying to recover");
103 dst_error_recovery(state);
104 return -1;
105 }
106 if ((dst_pio_disable(state)) < 0) {
107 dprintk(verbose, DST_CA_ERROR, 1, " DST PIO disable failed.");
108 return -1;
109 }
110 if (read_dst(state, &reply, GET_ACK) < 0) {
111 dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
112 dst_error_recovery(state);
113 return -1;
114 }
115 if (read) {
116 if (! dst_wait_dst_ready(state, LONG_DELAY)) {
117 dprintk(verbose, DST_CA_NOTICE, 1, " 8820 not ready");
118 return -1;
119 }
120 if (read_dst(state, ca_string, 128) < 0) { /* Try to make this dynamic */
121 dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
122 dst_error_recovery(state);
123 return -1;
124 }
125 }
126
127 return 0;
128 }
129
130
131 static int dst_put_ci(struct dst_state *state, u8 *data, int len, u8 *ca_string, int read)
132 {
133 u8 dst_ca_comm_err = 0;
134
135 while (dst_ca_comm_err < RETRIES) {
136 dst_comm_init(state);
137 dprintk(verbose, DST_CA_NOTICE, 1, " Put Command");
138 if (dst_ci_command(state, data, ca_string, len, read)) { // If error
139 dst_error_recovery(state);
140 dst_ca_comm_err++; // work required here.
141 }
142 break;
143 }
144
145 return 0;
146 }
147
148
149
150 static int ca_get_app_info(struct dst_state *state)
151 {
152 static u8 command[8] = {0x07, 0x40, 0x01, 0x00, 0x01, 0x00, 0x00, 0xff};
153
154 put_checksum(&command[0], command[0]);
155 if ((dst_put_ci(state, command, sizeof(command), state->messages, GET_REPLY)) < 0) {
156 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
157 return -1;
158 }
159 dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
160 dprintk(verbose, DST_CA_INFO, 1, " ================================ CI Module Application Info ======================================");
161 dprintk(verbose, DST_CA_INFO, 1, " Application Type=[%d], Application Vendor=[%d], Vendor Code=[%d]\n%s: Application info=[%s]",
162 state->messages[7], (state->messages[8] << 8) | state->messages[9],
163 (state->messages[10] << 8) | state->messages[11], __FUNCTION__, (char *)(&state->messages[12]));
164 dprintk(verbose, DST_CA_INFO, 1, " ==================================================================================================");
165
166 return 0;
167 }
168
169 static int ca_get_slot_caps(struct dst_state *state, struct ca_caps *p_ca_caps, void *arg)
170 {
171 int i;
172 u8 slot_cap[256];
173 static u8 slot_command[8] = {0x07, 0x40, 0x02, 0x00, 0x02, 0x00, 0x00, 0xff};
174
175 put_checksum(&slot_command[0], slot_command[0]);
176 if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_cap, GET_REPLY)) < 0) {
177 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
178 return -1;
179 }
180 dprintk(verbose, DST_CA_NOTICE, 1, " -->dst_put_ci SUCCESS !");
181
182 /* Will implement the rest soon */
183
184 dprintk(verbose, DST_CA_INFO, 1, " Slot cap = [%d]", slot_cap[7]);
185 dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
186 for (i = 0; i < 8; i++)
187 dprintk(verbose, DST_CA_INFO, 0, " %d", slot_cap[i]);
188 dprintk(verbose, DST_CA_INFO, 0, "\n");
189
190 p_ca_caps->slot_num = 1;
191 p_ca_caps->slot_type = 1;
192 p_ca_caps->descr_num = slot_cap[7];
193 p_ca_caps->descr_type = 1;
194
195 if (copy_to_user((struct ca_caps *)arg, p_ca_caps, sizeof (struct ca_caps)))
196 return -EFAULT;
197
198 return 0;
199 }
200
201 /* Need some more work */
202 static int ca_get_slot_descr(struct dst_state *state, struct ca_msg *p_ca_message, void *arg)
203 {
204 return -EOPNOTSUPP;
205 }
206
207
208 static int ca_get_slot_info(struct dst_state *state, struct ca_slot_info *p_ca_slot_info, void *arg)
209 {
210 int i;
211 static u8 slot_command[8] = {0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff};
212
213 u8 *slot_info = state->rxbuffer;
214
215 put_checksum(&slot_command[0], 7);
216 if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_info, GET_REPLY)) < 0) {
217 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
218 return -1;
219 }
220 dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
221
222 /* Will implement the rest soon */
223
224 dprintk(verbose, DST_CA_INFO, 1, " Slot info = [%d]", slot_info[3]);
225 dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
226 for (i = 0; i < 8; i++)
227 dprintk(verbose, DST_CA_INFO, 0, " %d", slot_info[i]);
228 dprintk(verbose, DST_CA_INFO, 0, "\n");
229
230 if (slot_info[4] & 0x80) {
231 p_ca_slot_info->flags = CA_CI_MODULE_PRESENT;
232 p_ca_slot_info->num = 1;
233 p_ca_slot_info->type = CA_CI;
234 } else if (slot_info[4] & 0x40) {
235 p_ca_slot_info->flags = CA_CI_MODULE_READY;
236 p_ca_slot_info->num = 1;
237 p_ca_slot_info->type = CA_CI;
238 } else
239 p_ca_slot_info->flags = 0;
240
241 if (copy_to_user((struct ca_slot_info *)arg, p_ca_slot_info, sizeof (struct ca_slot_info)))
242 return -EFAULT;
243
244 return 0;
245 }
246
247
248 static int ca_get_message(struct dst_state *state, struct ca_msg *p_ca_message, void *arg)
249 {
250 u8 i = 0;
251 u32 command = 0;
252
253 if (copy_from_user(p_ca_message, (void *)arg, sizeof (struct ca_msg)))
254 return -EFAULT;
255
256 if (p_ca_message->msg) {
257 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]);
258
259 for (i = 0; i < 3; i++) {
260 command = command | p_ca_message->msg[i];
261 if (i < 2)
262 command = command << 8;
263 }
264 dprintk(verbose, DST_CA_NOTICE, 1, " Command=[0x%x]", command);
265
266 switch (command) {
267 case CA_APP_INFO:
268 memcpy(p_ca_message->msg, state->messages, 128);
269 if (copy_to_user((void *)arg, p_ca_message, sizeof (struct ca_msg)) )
270 return -EFAULT;
271 break;
272 }
273 }
274
275 return 0;
276 }
277
278 static int handle_dst_tag(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u32 length)
279 {
280 if (state->dst_hw_cap & DST_TYPE_HAS_SESSION) {
281 hw_buffer->msg[2] = p_ca_message->msg[1]; /* MSB */
282 hw_buffer->msg[3] = p_ca_message->msg[2]; /* LSB */
283 } else {
284 if (length > 247) {
285 dprintk(verbose, DST_CA_ERROR, 1, " Message too long ! *** Bailing Out *** !");
286 return -1;
287 }
288 hw_buffer->msg[0] = (length & 0xff) + 7;
289 hw_buffer->msg[1] = 0x40;
290 hw_buffer->msg[2] = 0x03;
291 hw_buffer->msg[3] = 0x00;
292 hw_buffer->msg[4] = 0x03;
293 hw_buffer->msg[5] = length & 0xff;
294 hw_buffer->msg[6] = 0x00;
295 /*
296 * Need to compute length for EN50221 section 8.3.2, for the time being
297 * assuming 8.3.2 is not applicable
298 */
299 memcpy(&hw_buffer->msg[7], &p_ca_message->msg[4], length);
300 }
301 return 0;
302 }
303
304
305 static int write_to_8820(struct dst_state *state, struct ca_msg *hw_buffer, u8 length, u8 reply)
306 {
307 if ((dst_put_ci(state, hw_buffer->msg, length, hw_buffer->msg, reply)) < 0) {
308 dprintk(verbose, DST_CA_ERROR, 1, " DST-CI Command failed.");
309 dprintk(verbose, DST_CA_NOTICE, 1, " Resetting DST.");
310 rdc_reset_state(state);
311 return -1;
312 }
313 dprintk(verbose, DST_CA_NOTICE, 1, " DST-CI Command succes.");
314
315 return 0;
316 }
317
318 u32 asn_1_decode(u8 *asn_1_array)
319 {
320 u8 length_field = 0, word_count = 0, count = 0;
321 u32 length = 0;
322
323 length_field = asn_1_array[0];
324 dprintk(verbose, DST_CA_DEBUG, 1, " Length field=[%02x]", length_field);
325 if (length_field < 0x80) {
326 length = length_field & 0x7f;
327 dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%02x]\n", length);
328 } else {
329 word_count = length_field & 0x7f;
330 for (count = 0; count < word_count; count++) {
331 length = (length | asn_1_array[count + 1]) << 8;
332 dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%04x]", length);
333 }
334 }
335 return length;
336 }
337
338 static int debug_string(u8 *msg, u32 length, u32 offset)
339 {
340 u32 i;
341
342 dprintk(verbose, DST_CA_DEBUG, 0, " String=[ ");
343 for (i = offset; i < length; i++)
344 dprintk(verbose, DST_CA_DEBUG, 0, "%02x ", msg[i]);
345 dprintk(verbose, DST_CA_DEBUG, 0, "]\n");
346
347 return 0;
348 }
349
350 static int ca_set_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u8 reply, u8 query)
351 {
352 u32 length = 0;
353 u8 tag_length = 8;
354
355 length = asn_1_decode(&p_ca_message->msg[3]);
356 dprintk(verbose, DST_CA_DEBUG, 1, " CA Message length=[%d]", length);
357 debug_string(&p_ca_message->msg[4], length, 0); /* length is excluding tag & length */
358
359 memset(hw_buffer->msg, '\0', length);
360 handle_dst_tag(state, p_ca_message, hw_buffer, length);
361 put_checksum(hw_buffer->msg, hw_buffer->msg[0]);
362
363 debug_string(hw_buffer->msg, (length + tag_length), 0); /* tags too */
364 write_to_8820(state, hw_buffer, (length + tag_length), reply);
365
366 return 0;
367 }
368
369
370 /* Board supports CA PMT reply ? */
371 static int dst_check_ca_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer)
372 {
373 int ca_pmt_reply_test = 0;
374
375 /* Do test board */
376 /* Not there yet but soon */
377
378 /* CA PMT Reply capable */
379 if (ca_pmt_reply_test) {
380 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 1, GET_REPLY)) < 0) {
381 dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
382 return -1;
383 }
384
385 /* Process CA PMT Reply */
386 /* will implement soon */
387 dprintk(verbose, DST_CA_ERROR, 1, " Not there yet");
388 }
389 /* CA PMT Reply not capable */
390 if (!ca_pmt_reply_test) {
391 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, NO_REPLY)) < 0) {
392 dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
393 return -1;
394 }
395 dprintk(verbose, DST_CA_NOTICE, 1, " ca_set_pmt.. success !");
396 /* put a dummy message */
397
398 }
399 return 0;
400 }
401
402 static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message, void *arg)
403 {
404 int i = 0;
405 unsigned int ca_message_header_len;
406
407 u32 command = 0;
408 struct ca_msg *hw_buffer;
409
410 if ((hw_buffer = (struct ca_msg *) kmalloc(sizeof (struct ca_msg), GFP_KERNEL)) == NULL) {
411 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
412 return -ENOMEM;
413 }
414 dprintk(verbose, DST_CA_DEBUG, 1, " ");
415
416 if (copy_from_user(p_ca_message, (void *)arg, sizeof (struct ca_msg)))
417 return -EFAULT;
418
419 if (p_ca_message->msg) {
420 ca_message_header_len = p_ca_message->length; /* Restore it back when you are done */
421 /* EN50221 tag */
422 command = 0;
423
424 for (i = 0; i < 3; i++) {
425 command = command | p_ca_message->msg[i];
426 if (i < 2)
427 command = command << 8;
428 }
429 dprintk(verbose, DST_CA_DEBUG, 1, " Command=[0x%x]\n", command);
430
431 switch (command) {
432 case CA_PMT:
433 dprintk(verbose, DST_CA_DEBUG, 1, "Command = SEND_CA_PMT");
434 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, 0)) < 0) { // code simplification started
435 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT Failed !");
436 return -1;
437 }
438 dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT Success !");
439 break;
440 case CA_PMT_REPLY:
441 dprintk(verbose, DST_CA_INFO, 1, "Command = CA_PMT_REPLY");
442 /* Have to handle the 2 basic types of cards here */
443 if ((dst_check_ca_pmt(state, p_ca_message, hw_buffer)) < 0) {
444 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT_REPLY Failed !");
445 return -1;
446 }
447 dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT_REPLY Success !");
448 break;
449 case CA_APP_INFO_ENQUIRY: // only for debugging
450 dprintk(verbose, DST_CA_INFO, 1, " Getting Cam Application information");
451
452 if ((ca_get_app_info(state)) < 0) {
453 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_APP_INFO_ENQUIRY Failed !");
454 return -1;
455 }
456 dprintk(verbose, DST_CA_INFO, 1, " -->CA_APP_INFO_ENQUIRY Success !");
457 break;
458 }
459 }
460 return 0;
461 }
462
463 static int dst_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg)
464 {
465 struct dvb_device* dvbdev = (struct dvb_device*) file->private_data;
466 struct dst_state* state = (struct dst_state*) dvbdev->priv;
467 struct ca_slot_info *p_ca_slot_info;
468 struct ca_caps *p_ca_caps;
469 struct ca_msg *p_ca_message;
470
471 if ((p_ca_message = (struct ca_msg *) kmalloc(sizeof (struct ca_msg), GFP_KERNEL)) == NULL) {
472 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
473 return -ENOMEM;
474 }
475 if ((p_ca_slot_info = (struct ca_slot_info *) kmalloc(sizeof (struct ca_slot_info), GFP_KERNEL)) == NULL) {
476 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
477 return -ENOMEM;
478 }
479 if ((p_ca_caps = (struct ca_caps *) kmalloc(sizeof (struct ca_caps), GFP_KERNEL)) == NULL) {
480 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
481 return -ENOMEM;
482 }
483 /* We have now only the standard ioctl's, the driver is upposed to handle internals. */
484 switch (cmd) {
485 case CA_SEND_MSG:
486 dprintk(verbose, DST_CA_INFO, 1, " Sending message");
487 if ((ca_send_message(state, p_ca_message, arg)) < 0) {
488 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SEND_MSG Failed !");
489 return -1;
490 }
491 break;
492 case CA_GET_MSG:
493 dprintk(verbose, DST_CA_INFO, 1, " Getting message");
494 if ((ca_get_message(state, p_ca_message, arg)) < 0) {
495 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_MSG Failed !");
496 return -1;
497 }
498 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_MSG Success !");
499 break;
500 case CA_RESET:
501 dprintk(verbose, DST_CA_ERROR, 1, " Resetting DST");
502 dst_error_bailout(state);
503 msleep(4000);
504 break;
505 case CA_GET_SLOT_INFO:
506 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot info");
507 if ((ca_get_slot_info(state, p_ca_slot_info, arg)) < 0) {
508 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_SLOT_INFO Failed !");
509 return -1;
510 }
511 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_SLOT_INFO Success !");
512 break;
513 case CA_GET_CAP:
514 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot capabilities");
515 if ((ca_get_slot_caps(state, p_ca_caps, arg)) < 0) {
516 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_CAP Failed !");
517 return -1;
518 }
519 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_CAP Success !");
520 break;
521 case CA_GET_DESCR_INFO:
522 dprintk(verbose, DST_CA_INFO, 1, " Getting descrambler description");
523 if ((ca_get_slot_descr(state, p_ca_message, arg)) < 0) {
524 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_DESCR_INFO Failed !");
525 return -1;
526 }
527 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_DESCR_INFO Success !");
528 break;
529 case CA_SET_DESCR:
530 dprintk(verbose, DST_CA_INFO, 1, " Setting descrambler");
531 if ((ca_set_slot_descr()) < 0) {
532 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_DESCR Failed !");
533 return -1;
534 }
535 dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_DESCR Success !");
536 break;
537 case CA_SET_PID:
538 dprintk(verbose, DST_CA_INFO, 1, " Setting PID");
539 if ((ca_set_pid()) < 0) {
540 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_PID Failed !");
541 return -1;
542 }
543 dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_PID Success !");
544 default:
545 return -EOPNOTSUPP;
546 };
547
548 return 0;
549 }
550
551 static int dst_ca_open(struct inode *inode, struct file *file)
552 {
553 dprintk(verbose, DST_CA_DEBUG, 1, " Device opened [%p] ", file);
554 try_module_get(THIS_MODULE);
555
556 return 0;
557 }
558
559 static int dst_ca_release(struct inode *inode, struct file *file)
560 {
561 dprintk(verbose, DST_CA_DEBUG, 1, " Device closed.");
562 module_put(THIS_MODULE);
563
564 return 0;
565 }
566
567 static int dst_ca_read(struct file *file, char __user *buffer, size_t length, loff_t *offset)
568 {
569 int bytes_read = 0;
570
571 dprintk(verbose, DST_CA_DEBUG, 1, " Device read.");
572
573 return bytes_read;
574 }
575
576 static int dst_ca_write(struct file *file, const char __user *buffer, size_t length, loff_t *offset)
577 {
578 dprintk(verbose, DST_CA_DEBUG, 1, " Device write.");
579
580 return 0;
581 }
582
583 static struct file_operations dst_ca_fops = {
584 .owner = THIS_MODULE,
585 .ioctl = (void *)dst_ca_ioctl,
586 .open = dst_ca_open,
587 .release = dst_ca_release,
588 .read = dst_ca_read,
589 .write = dst_ca_write
590 };
591
592 static struct dvb_device dvbdev_ca = {
593 .priv = NULL,
594 .users = 1,
595 .readers = 1,
596 .writers = 1,
597 .fops = &dst_ca_fops
598 };
599
600 int dst_ca_attach(struct dst_state *dst, struct dvb_adapter *dvb_adapter)
601 {
602 struct dvb_device *dvbdev;
603 dprintk(verbose, DST_CA_ERROR, 1, "registering DST-CA device");
604 dvb_register_device(dvb_adapter, &dvbdev, &dvbdev_ca, dst, DVB_DEVICE_CA);
605 return 0;
606 }
607
608 EXPORT_SYMBOL(dst_ca_attach);
609
610 MODULE_DESCRIPTION("DST DVB-S/T/C Combo CA driver");
611 MODULE_AUTHOR("Manu Abraham");
612 MODULE_LICENSE("GPL");
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