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[ARM] Support register switch in nommu mode
[linux-2.6/verdex.git] / drivers / media / dvb / bt8xx / dst_ca.c
blobc650b4bf7f5f8caee597fb19455ad0dd70593290
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 void put_checksum(u8 *check_string, int length)
73 {
74 dprintk(verbose, DST_CA_DEBUG, 1, " Computing string checksum.");
75 dprintk(verbose, DST_CA_DEBUG, 1, " -> string length : 0x%02x", length);
76 check_string[length] = dst_check_sum (check_string, length);
77 dprintk(verbose, DST_CA_DEBUG, 1, " -> checksum : 0x%02x", check_string[length]);
78 }
79
80 static int dst_ci_command(struct dst_state* state, u8 * data, u8 *ca_string, u8 len, int read)
81 {
82 u8 reply;
83
84 down(&state->dst_mutex);
85 dst_comm_init(state);
86 msleep(65);
87
88 if (write_dst(state, data, len)) {
89 dprintk(verbose, DST_CA_INFO, 1, " Write not successful, trying to recover");
90 dst_error_recovery(state);
91 goto error;
92 }
93 if ((dst_pio_disable(state)) < 0) {
94 dprintk(verbose, DST_CA_ERROR, 1, " DST PIO disable failed.");
95 goto error;
96 }
97 if (read_dst(state, &reply, GET_ACK) < 0) {
98 dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
99 dst_error_recovery(state);
100 goto error;
101 }
102 if (read) {
103 if (! dst_wait_dst_ready(state, LONG_DELAY)) {
104 dprintk(verbose, DST_CA_NOTICE, 1, " 8820 not ready");
105 goto error;
106 }
107 if (read_dst(state, ca_string, 128) < 0) { /* Try to make this dynamic */
108 dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
109 dst_error_recovery(state);
110 goto error;
111 }
112 }
113 up(&state->dst_mutex);
114 return 0;
115
116 error:
117 up(&state->dst_mutex);
118 return -EIO;
119 }
120
121
122 static int dst_put_ci(struct dst_state *state, u8 *data, int len, u8 *ca_string, int read)
123 {
124 u8 dst_ca_comm_err = 0;
125
126 while (dst_ca_comm_err < RETRIES) {
127 dst_comm_init(state);
128 dprintk(verbose, DST_CA_NOTICE, 1, " Put Command");
129 if (dst_ci_command(state, data, ca_string, len, read)) { // If error
130 dst_error_recovery(state);
131 dst_ca_comm_err++; // work required here.
132 }
133 break;
134 }
135
136 return 0;
137 }
138
139
140
141 static int ca_get_app_info(struct dst_state *state)
142 {
143 static u8 command[8] = {0x07, 0x40, 0x01, 0x00, 0x01, 0x00, 0x00, 0xff};
144
145 put_checksum(&command[0], command[0]);
146 if ((dst_put_ci(state, command, sizeof(command), state->messages, GET_REPLY)) < 0) {
147 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
148 return -1;
149 }
150 dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
151 dprintk(verbose, DST_CA_INFO, 1, " ================================ CI Module Application Info ======================================");
152 dprintk(verbose, DST_CA_INFO, 1, " Application Type=[%d], Application Vendor=[%d], Vendor Code=[%d]\n%s: Application info=[%s]",
153 state->messages[7], (state->messages[8] << 8) | state->messages[9],
154 (state->messages[10] << 8) | state->messages[11], __FUNCTION__, (char *)(&state->messages[12]));
155 dprintk(verbose, DST_CA_INFO, 1, " ==================================================================================================");
156
157 return 0;
158 }
159
160 static int ca_get_slot_caps(struct dst_state *state, struct ca_caps *p_ca_caps, void __user *arg)
161 {
162 int i;
163 u8 slot_cap[256];
164 static u8 slot_command[8] = {0x07, 0x40, 0x02, 0x00, 0x02, 0x00, 0x00, 0xff};
165
166 put_checksum(&slot_command[0], slot_command[0]);
167 if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_cap, GET_REPLY)) < 0) {
168 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
169 return -1;
170 }
171 dprintk(verbose, DST_CA_NOTICE, 1, " -->dst_put_ci SUCCESS !");
172
173 /* Will implement the rest soon */
174
175 dprintk(verbose, DST_CA_INFO, 1, " Slot cap = [%d]", slot_cap[7]);
176 dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
177 for (i = 0; i < 8; i++)
178 dprintk(verbose, DST_CA_INFO, 0, " %d", slot_cap[i]);
179 dprintk(verbose, DST_CA_INFO, 0, "\n");
180
181 p_ca_caps->slot_num = 1;
182 p_ca_caps->slot_type = 1;
183 p_ca_caps->descr_num = slot_cap[7];
184 p_ca_caps->descr_type = 1;
185
186 if (copy_to_user(arg, p_ca_caps, sizeof (struct ca_caps)))
187 return -EFAULT;
188
189 return 0;
190 }
191
192 /* Need some more work */
193 static int ca_get_slot_descr(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
194 {
195 return -EOPNOTSUPP;
196 }
197
198
199 static int ca_get_slot_info(struct dst_state *state, struct ca_slot_info *p_ca_slot_info, void __user *arg)
200 {
201 int i;
202 static u8 slot_command[8] = {0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff};
203
204 u8 *slot_info = state->messages;
205
206 put_checksum(&slot_command[0], 7);
207 if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_info, GET_REPLY)) < 0) {
208 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
209 return -1;
210 }
211 dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
212
213 /* Will implement the rest soon */
214
215 dprintk(verbose, DST_CA_INFO, 1, " Slot info = [%d]", slot_info[3]);
216 dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
217 for (i = 0; i < 8; i++)
218 dprintk(verbose, DST_CA_INFO, 0, " %d", slot_info[i]);
219 dprintk(verbose, DST_CA_INFO, 0, "\n");
220
221 if (slot_info[4] & 0x80) {
222 p_ca_slot_info->flags = CA_CI_MODULE_PRESENT;
223 p_ca_slot_info->num = 1;
224 p_ca_slot_info->type = CA_CI;
225 } else if (slot_info[4] & 0x40) {
226 p_ca_slot_info->flags = CA_CI_MODULE_READY;
227 p_ca_slot_info->num = 1;
228 p_ca_slot_info->type = CA_CI;
229 } else
230 p_ca_slot_info->flags = 0;
231
232 if (copy_to_user(arg, p_ca_slot_info, sizeof (struct ca_slot_info)))
233 return -EFAULT;
234
235 return 0;
236 }
237
238
239 static int ca_get_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
240 {
241 u8 i = 0;
242 u32 command = 0;
243
244 if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg)))
245 return -EFAULT;
246
247 if (p_ca_message->msg) {
248 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]);
249
250 for (i = 0; i < 3; i++) {
251 command = command | p_ca_message->msg[i];
252 if (i < 2)
253 command = command << 8;
254 }
255 dprintk(verbose, DST_CA_NOTICE, 1, " Command=[0x%x]", command);
256
257 switch (command) {
258 case CA_APP_INFO:
259 memcpy(p_ca_message->msg, state->messages, 128);
260 if (copy_to_user(arg, p_ca_message, sizeof (struct ca_msg)) )
261 return -EFAULT;
262 break;
263 }
264 }
265
266 return 0;
267 }
268
269 static int handle_dst_tag(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u32 length)
270 {
271 if (state->dst_hw_cap & DST_TYPE_HAS_SESSION) {
272 hw_buffer->msg[2] = p_ca_message->msg[1]; /* MSB */
273 hw_buffer->msg[3] = p_ca_message->msg[2]; /* LSB */
274 } else {
275 if (length > 247) {
276 dprintk(verbose, DST_CA_ERROR, 1, " Message too long ! *** Bailing Out *** !");
277 return -1;
278 }
279 hw_buffer->msg[0] = (length & 0xff) + 7;
280 hw_buffer->msg[1] = 0x40;
281 hw_buffer->msg[2] = 0x03;
282 hw_buffer->msg[3] = 0x00;
283 hw_buffer->msg[4] = 0x03;
284 hw_buffer->msg[5] = length & 0xff;
285 hw_buffer->msg[6] = 0x00;
286
287 /*
288 * Need to compute length for EN50221 section 8.3.2, for the time being
289 * assuming 8.3.2 is not applicable
290 */
291 memcpy(&hw_buffer->msg[7], &p_ca_message->msg[4], length);
292 }
293
294 return 0;
295 }
296
297 static int write_to_8820(struct dst_state *state, struct ca_msg *hw_buffer, u8 length, u8 reply)
298 {
299 if ((dst_put_ci(state, hw_buffer->msg, length, hw_buffer->msg, reply)) < 0) {
300 dprintk(verbose, DST_CA_ERROR, 1, " DST-CI Command failed.");
301 dprintk(verbose, DST_CA_NOTICE, 1, " Resetting DST.");
302 rdc_reset_state(state);
303 return -1;
304 }
305 dprintk(verbose, DST_CA_NOTICE, 1, " DST-CI Command succes.");
306
307 return 0;
308 }
309
310 static u32 asn_1_decode(u8 *asn_1_array)
311 {
312 u8 length_field = 0, word_count = 0, count = 0;
313 u32 length = 0;
314
315 length_field = asn_1_array[0];
316 dprintk(verbose, DST_CA_DEBUG, 1, " Length field=[%02x]", length_field);
317 if (length_field < 0x80) {
318 length = length_field & 0x7f;
319 dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%02x]\n", length);
320 } else {
321 word_count = length_field & 0x7f;
322 for (count = 0; count < word_count; count++) {
323 length = length << 8;
324 length += asn_1_array[count + 1];
325 dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%04x]", length);
326 }
327 }
328 return length;
329 }
330
331 static int debug_string(u8 *msg, u32 length, u32 offset)
332 {
333 u32 i;
334
335 dprintk(verbose, DST_CA_DEBUG, 0, " String=[ ");
336 for (i = offset; i < length; i++)
337 dprintk(verbose, DST_CA_DEBUG, 0, "%02x ", msg[i]);
338 dprintk(verbose, DST_CA_DEBUG, 0, "]\n");
339
340 return 0;
341 }
342
343 static int ca_set_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u8 reply, u8 query)
344 {
345 u32 length = 0;
346 u8 tag_length = 8;
347
348 length = asn_1_decode(&p_ca_message->msg[3]);
349 dprintk(verbose, DST_CA_DEBUG, 1, " CA Message length=[%d]", length);
350 debug_string(&p_ca_message->msg[4], length, 0); /* length is excluding tag & length */
351
352 memset(hw_buffer->msg, '\0', length);
353 handle_dst_tag(state, p_ca_message, hw_buffer, length);
354 put_checksum(hw_buffer->msg, hw_buffer->msg[0]);
355
356 debug_string(hw_buffer->msg, (length + tag_length), 0); /* tags too */
357 write_to_8820(state, hw_buffer, (length + tag_length), reply);
358
359 return 0;
360 }
361
362
363 /* Board supports CA PMT reply ? */
364 static int dst_check_ca_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer)
365 {
366 int ca_pmt_reply_test = 0;
367
368 /* Do test board */
369 /* Not there yet but soon */
370
371 /* CA PMT Reply capable */
372 if (ca_pmt_reply_test) {
373 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 1, GET_REPLY)) < 0) {
374 dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
375 return -1;
376 }
377
378 /* Process CA PMT Reply */
379 /* will implement soon */
380 dprintk(verbose, DST_CA_ERROR, 1, " Not there yet");
381 }
382 /* CA PMT Reply not capable */
383 if (!ca_pmt_reply_test) {
384 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, NO_REPLY)) < 0) {
385 dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
386 return -1;
387 }
388 dprintk(verbose, DST_CA_NOTICE, 1, " ca_set_pmt.. success !");
389 /* put a dummy message */
390
391 }
392 return 0;
393 }
394
395 static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
396 {
397 int i = 0;
398 unsigned int ca_message_header_len;
399
400 u32 command = 0;
401 struct ca_msg *hw_buffer;
402 int result = 0;
403
404 if ((hw_buffer = (struct ca_msg *) kmalloc(sizeof (struct ca_msg), GFP_KERNEL)) == NULL) {
405 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
406 return -ENOMEM;
407 }
408 dprintk(verbose, DST_CA_DEBUG, 1, " ");
409
410 if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg))) {
411 result = -EFAULT;
412 goto free_mem_and_exit;
413 }
414
415
416 if (p_ca_message->msg) {
417 ca_message_header_len = p_ca_message->length; /* Restore it back when you are done */
418 /* EN50221 tag */
419 command = 0;
420
421 for (i = 0; i < 3; i++) {
422 command = command | p_ca_message->msg[i];
423 if (i < 2)
424 command = command << 8;
425 }
426 dprintk(verbose, DST_CA_DEBUG, 1, " Command=[0x%x]\n", command);
427
428 switch (command) {
429 case CA_PMT:
430 dprintk(verbose, DST_CA_DEBUG, 1, "Command = SEND_CA_PMT");
431 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, 0)) < 0) { // code simplification started
432 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT Failed !");
433 result = -1;
434 goto free_mem_and_exit;
435 }
436 dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT Success !");
437 break;
438 case CA_PMT_REPLY:
439 dprintk(verbose, DST_CA_INFO, 1, "Command = CA_PMT_REPLY");
440 /* Have to handle the 2 basic types of cards here */
441 if ((dst_check_ca_pmt(state, p_ca_message, hw_buffer)) < 0) {
442 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT_REPLY Failed !");
443 result = -1;
444 goto free_mem_and_exit;
445 }
446 dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT_REPLY Success !");
447 break;
448 case CA_APP_INFO_ENQUIRY: // only for debugging
449 dprintk(verbose, DST_CA_INFO, 1, " Getting Cam Application information");
450
451 if ((ca_get_app_info(state)) < 0) {
452 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_APP_INFO_ENQUIRY Failed !");
453 result = -1;
454 goto free_mem_and_exit;
455 }
456 dprintk(verbose, DST_CA_INFO, 1, " -->CA_APP_INFO_ENQUIRY Success !");
457 break;
458 }
459 }
460 free_mem_and_exit:
461 kfree (hw_buffer);
462
463 return result;
464 }
465
466 static int dst_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long ioctl_arg)
467 {
468 struct dvb_device* dvbdev = (struct dvb_device*) file->private_data;
469 struct dst_state* state = (struct dst_state*) dvbdev->priv;
470 struct ca_slot_info *p_ca_slot_info;
471 struct ca_caps *p_ca_caps;
472 struct ca_msg *p_ca_message;
473 void __user *arg = (void __user *)ioctl_arg;
474 int result = 0;
475
476 if ((p_ca_message = (struct ca_msg *) kmalloc(sizeof (struct ca_msg), GFP_KERNEL)) == NULL) {
477 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
478 return -ENOMEM;
479 }
480 if ((p_ca_slot_info = (struct ca_slot_info *) kmalloc(sizeof (struct ca_slot_info), GFP_KERNEL)) == NULL) {
481 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
482 return -ENOMEM;
483 }
484 if ((p_ca_caps = (struct ca_caps *) kmalloc(sizeof (struct ca_caps), GFP_KERNEL)) == NULL) {
485 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
486 return -ENOMEM;
487 }
488 /* We have now only the standard ioctl's, the driver is upposed to handle internals. */
489 switch (cmd) {
490 case CA_SEND_MSG:
491 dprintk(verbose, DST_CA_INFO, 1, " Sending message");
492 if ((ca_send_message(state, p_ca_message, arg)) < 0) {
493 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SEND_MSG Failed !");
494 result = -1;
495 goto free_mem_and_exit;
496 }
497 break;
498 case CA_GET_MSG:
499 dprintk(verbose, DST_CA_INFO, 1, " Getting message");
500 if ((ca_get_message(state, p_ca_message, arg)) < 0) {
501 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_MSG Failed !");
502 result = -1;
503 goto free_mem_and_exit;
504 }
505 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_MSG Success !");
506 break;
507 case CA_RESET:
508 dprintk(verbose, DST_CA_ERROR, 1, " Resetting DST");
509 dst_error_bailout(state);
510 msleep(4000);
511 break;
512 case CA_GET_SLOT_INFO:
513 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot info");
514 if ((ca_get_slot_info(state, p_ca_slot_info, arg)) < 0) {
515 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_SLOT_INFO Failed !");
516 result = -1;
517 goto free_mem_and_exit;
518 }
519 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_SLOT_INFO Success !");
520 break;
521 case CA_GET_CAP:
522 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot capabilities");
523 if ((ca_get_slot_caps(state, p_ca_caps, arg)) < 0) {
524 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_CAP Failed !");
525 result = -1;
526 goto free_mem_and_exit;
527 }
528 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_CAP Success !");
529 break;
530 case CA_GET_DESCR_INFO:
531 dprintk(verbose, DST_CA_INFO, 1, " Getting descrambler description");
532 if ((ca_get_slot_descr(state, p_ca_message, arg)) < 0) {
533 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_DESCR_INFO Failed !");
534 result = -1;
535 goto free_mem_and_exit;
536 }
537 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_DESCR_INFO Success !");
538 break;
539 case CA_SET_DESCR:
540 dprintk(verbose, DST_CA_INFO, 1, " Setting descrambler");
541 if ((ca_set_slot_descr()) < 0) {
542 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_DESCR Failed !");
543 result = -1;
544 goto free_mem_and_exit;
545 }
546 dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_DESCR Success !");
547 break;
548 case CA_SET_PID:
549 dprintk(verbose, DST_CA_INFO, 1, " Setting PID");
550 if ((ca_set_pid()) < 0) {
551 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_PID Failed !");
552 result = -1;
553 goto free_mem_and_exit;
554 }
555 dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_PID Success !");
556 default:
557 result = -EOPNOTSUPP;
558 };
559 free_mem_and_exit:
560 kfree (p_ca_message);
561 kfree (p_ca_slot_info);
562 kfree (p_ca_caps);
563
564 return result;
565 }
566
567 static int dst_ca_open(struct inode *inode, struct file *file)
568 {
569 dprintk(verbose, DST_CA_DEBUG, 1, " Device opened [%p] ", file);
570 try_module_get(THIS_MODULE);
571
572 return 0;
573 }
574
575 static int dst_ca_release(struct inode *inode, struct file *file)
576 {
577 dprintk(verbose, DST_CA_DEBUG, 1, " Device closed.");
578 module_put(THIS_MODULE);
579
580 return 0;
581 }
582
583 static ssize_t dst_ca_read(struct file *file, char __user *buffer, size_t length, loff_t *offset)
584 {
585 int bytes_read = 0;
586
587 dprintk(verbose, DST_CA_DEBUG, 1, " Device read.");
588
589 return bytes_read;
590 }
591
592 static ssize_t dst_ca_write(struct file *file, const char __user *buffer, size_t length, loff_t *offset)
593 {
594 dprintk(verbose, DST_CA_DEBUG, 1, " Device write.");
595
596 return 0;
597 }
598
599 static struct file_operations dst_ca_fops = {
600 .owner = THIS_MODULE,
601 .ioctl = dst_ca_ioctl,
602 .open = dst_ca_open,
603 .release = dst_ca_release,
604 .read = dst_ca_read,
605 .write = dst_ca_write
606 };
607
608 static struct dvb_device dvbdev_ca = {
609 .priv = NULL,
610 .users = 1,
611 .readers = 1,
612 .writers = 1,
613 .fops = &dst_ca_fops
614 };
615
616 int dst_ca_attach(struct dst_state *dst, struct dvb_adapter *dvb_adapter)
617 {
618 struct dvb_device *dvbdev;
619 dprintk(verbose, DST_CA_ERROR, 1, "registering DST-CA device");
620 dvb_register_device(dvb_adapter, &dvbdev, &dvbdev_ca, dst, DVB_DEVICE_CA);
621 return 0;
622 }
623
624 EXPORT_SYMBOL(dst_ca_attach);
625
626 MODULE_DESCRIPTION("DST DVB-S/T/C Combo CA driver");
627 MODULE_AUTHOR("Manu Abraham");
628 MODULE_LICENSE("GPL");
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