2 CA-driver for TwinHan DST Frontend/Card
4 Copyright (C) 2004, 2005 Manu Abraham (manu@kromtek.com)
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.
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.
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.
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>
27 #include "dvb_frontend.h"
29 #include "dst_common.h"
31 #define DST_CA_ERROR 0
32 #define DST_CA_NOTICE 1
34 #define DST_CA_DEBUG 3
36 #define dprintk(x, y, z, format, arg...) do { \
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); \
48 printk(format, ## arg); \
53 static unsigned int verbose = 5;
54 module_param(verbose, int, 0644);
55 MODULE_PARM_DESC(verbose, "verbose startup messages, default is 1 (yes)");
57 /* Need some more work */
58 static int ca_set_slot_descr(void)
60 /* We could make this more graceful ? */
64 /* Need some more work */
65 static int ca_set_pid(void)
67 /* We could make this more graceful ? */
72 static void put_checksum(u8 *check_string, int length)
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]);
80 static int dst_ci_command(struct dst_state* state, u8 * data, u8 *ca_string, u8 len, int read)
87 if (write_dst(state, data, len)) {
88 dprintk(verbose, DST_CA_INFO, 1, " Write not successful, trying to recover");
89 dst_error_recovery(state);
92 if ((dst_pio_disable(state)) < 0) {
93 dprintk(verbose, DST_CA_ERROR, 1, " DST PIO disable failed.");
96 if (read_dst(state, &reply, GET_ACK) < 0) {
97 dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
98 dst_error_recovery(state);
102 if (! dst_wait_dst_ready(state, LONG_DELAY)) {
103 dprintk(verbose, DST_CA_NOTICE, 1, " 8820 not ready");
106 if (read_dst(state, ca_string, 128) < 0) { /* Try to make this dynamic */
107 dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
108 dst_error_recovery(state);
117 static int dst_put_ci(struct dst_state *state, u8 *data, int len, u8 *ca_string, int read)
119 u8 dst_ca_comm_err = 0;
121 while (dst_ca_comm_err < RETRIES) {
122 dst_comm_init(state);
123 dprintk(verbose, DST_CA_NOTICE, 1, " Put Command");
124 if (dst_ci_command(state, data, ca_string, len, read)) { // If error
125 dst_error_recovery(state);
126 dst_ca_comm_err++; // work required here.
136 static int ca_get_app_info(struct dst_state *state)
138 static u8 command[8] = {0x07, 0x40, 0x01, 0x00, 0x01, 0x00, 0x00, 0xff};
140 put_checksum(&command[0], command[0]);
141 if ((dst_put_ci(state, command, sizeof(command), state->messages, GET_REPLY)) < 0) {
142 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
145 dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
146 dprintk(verbose, DST_CA_INFO, 1, " ================================ CI Module Application Info ======================================");
147 dprintk(verbose, DST_CA_INFO, 1, " Application Type=[%d], Application Vendor=[%d], Vendor Code=[%d]\n%s: Application info=[%s]",
148 state->messages[7], (state->messages[8] << 8) | state->messages[9],
149 (state->messages[10] << 8) | state->messages[11], __FUNCTION__, (char *)(&state->messages[12]));
150 dprintk(verbose, DST_CA_INFO, 1, " ==================================================================================================");
155 static int ca_get_slot_caps(struct dst_state *state, struct ca_caps *p_ca_caps, void __user *arg)
159 static u8 slot_command[8] = {0x07, 0x40, 0x02, 0x00, 0x02, 0x00, 0x00, 0xff};
161 put_checksum(&slot_command[0], slot_command[0]);
162 if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_cap, GET_REPLY)) < 0) {
163 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
166 dprintk(verbose, DST_CA_NOTICE, 1, " -->dst_put_ci SUCCESS !");
168 /* Will implement the rest soon */
170 dprintk(verbose, DST_CA_INFO, 1, " Slot cap = [%d]", slot_cap[7]);
171 dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
172 for (i = 0; i < 8; i++)
173 dprintk(verbose, DST_CA_INFO, 0, " %d", slot_cap[i]);
174 dprintk(verbose, DST_CA_INFO, 0, "\n");
176 p_ca_caps->slot_num = 1;
177 p_ca_caps->slot_type = 1;
178 p_ca_caps->descr_num = slot_cap[7];
179 p_ca_caps->descr_type = 1;
181 if (copy_to_user(arg, p_ca_caps, sizeof (struct ca_caps)))
187 /* Need some more work */
188 static int ca_get_slot_descr(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
194 static int ca_get_slot_info(struct dst_state *state, struct ca_slot_info *p_ca_slot_info, void __user *arg)
197 static u8 slot_command[8] = {0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff};
199 u8 *slot_info = state->rxbuffer;
201 put_checksum(&slot_command[0], 7);
202 if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_info, GET_REPLY)) < 0) {
203 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
206 dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
208 /* Will implement the rest soon */
210 dprintk(verbose, DST_CA_INFO, 1, " Slot info = [%d]", slot_info[3]);
211 dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
212 for (i = 0; i < 8; i++)
213 dprintk(verbose, DST_CA_INFO, 0, " %d", slot_info[i]);
214 dprintk(verbose, DST_CA_INFO, 0, "\n");
216 if (slot_info[4] & 0x80) {
217 p_ca_slot_info->flags = CA_CI_MODULE_PRESENT;
218 p_ca_slot_info->num = 1;
219 p_ca_slot_info->type = CA_CI;
220 } else if (slot_info[4] & 0x40) {
221 p_ca_slot_info->flags = CA_CI_MODULE_READY;
222 p_ca_slot_info->num = 1;
223 p_ca_slot_info->type = CA_CI;
225 p_ca_slot_info->flags = 0;
227 if (copy_to_user(arg, p_ca_slot_info, sizeof (struct ca_slot_info)))
234 static int ca_get_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
239 if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg)))
242 if (p_ca_message->msg) {
243 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]);
245 for (i = 0; i < 3; i++) {
246 command = command | p_ca_message->msg[i];
248 command = command << 8;
250 dprintk(verbose, DST_CA_NOTICE, 1, " Command=[0x%x]", command);
254 memcpy(p_ca_message->msg, state->messages, 128);
255 if (copy_to_user(arg, p_ca_message, sizeof (struct ca_msg)) )
264 static int handle_dst_tag(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u32 length)
266 if (state->dst_hw_cap & DST_TYPE_HAS_SESSION) {
267 hw_buffer->msg[2] = p_ca_message->msg[1]; /* MSB */
268 hw_buffer->msg[3] = p_ca_message->msg[2]; /* LSB */
271 dprintk(verbose, DST_CA_ERROR, 1, " Message too long ! *** Bailing Out *** !");
274 hw_buffer->msg[0] = (length & 0xff) + 7;
275 hw_buffer->msg[1] = 0x40;
276 hw_buffer->msg[2] = 0x03;
277 hw_buffer->msg[3] = 0x00;
278 hw_buffer->msg[4] = 0x03;
279 hw_buffer->msg[5] = length & 0xff;
280 hw_buffer->msg[6] = 0x00;
282 * Need to compute length for EN50221 section 8.3.2, for the time being
283 * assuming 8.3.2 is not applicable
285 memcpy(&hw_buffer->msg[7], &p_ca_message->msg[4], length);
291 static int write_to_8820(struct dst_state *state, struct ca_msg *hw_buffer, u8 length, u8 reply)
293 if ((dst_put_ci(state, hw_buffer->msg, length, hw_buffer->msg, reply)) < 0) {
294 dprintk(verbose, DST_CA_ERROR, 1, " DST-CI Command failed.");
295 dprintk(verbose, DST_CA_NOTICE, 1, " Resetting DST.");
296 rdc_reset_state(state);
299 dprintk(verbose, DST_CA_NOTICE, 1, " DST-CI Command succes.");
304 static u32 asn_1_decode(u8 *asn_1_array)
306 u8 length_field = 0, word_count = 0, count = 0;
309 length_field = asn_1_array[0];
310 dprintk(verbose, DST_CA_DEBUG, 1, " Length field=[%02x]", length_field);
311 if (length_field < 0x80) {
312 length = length_field & 0x7f;
313 dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%02x]\n", length);
315 word_count = length_field & 0x7f;
316 for (count = 0; count < word_count; count++) {
317 length = length << 8;
318 length += asn_1_array[count + 1];
319 dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%04x]", length);
325 static int debug_string(u8 *msg, u32 length, u32 offset)
329 dprintk(verbose, DST_CA_DEBUG, 0, " String=[ ");
330 for (i = offset; i < length; i++)
331 dprintk(verbose, DST_CA_DEBUG, 0, "%02x ", msg[i]);
332 dprintk(verbose, DST_CA_DEBUG, 0, "]\n");
337 static int ca_set_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u8 reply, u8 query)
342 length = asn_1_decode(&p_ca_message->msg[3]);
343 dprintk(verbose, DST_CA_DEBUG, 1, " CA Message length=[%d]", length);
344 debug_string(&p_ca_message->msg[4], length, 0); /* length is excluding tag & length */
346 memset(hw_buffer->msg, '\0', length);
347 handle_dst_tag(state, p_ca_message, hw_buffer, length);
348 put_checksum(hw_buffer->msg, hw_buffer->msg[0]);
350 debug_string(hw_buffer->msg, (length + tag_length), 0); /* tags too */
351 write_to_8820(state, hw_buffer, (length + tag_length), reply);
357 /* Board supports CA PMT reply ? */
358 static int dst_check_ca_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer)
360 int ca_pmt_reply_test = 0;
363 /* Not there yet but soon */
365 /* CA PMT Reply capable */
366 if (ca_pmt_reply_test) {
367 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 1, GET_REPLY)) < 0) {
368 dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
372 /* Process CA PMT Reply */
373 /* will implement soon */
374 dprintk(verbose, DST_CA_ERROR, 1, " Not there yet");
376 /* CA PMT Reply not capable */
377 if (!ca_pmt_reply_test) {
378 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, NO_REPLY)) < 0) {
379 dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
382 dprintk(verbose, DST_CA_NOTICE, 1, " ca_set_pmt.. success !");
383 /* put a dummy message */
389 static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
392 unsigned int ca_message_header_len;
395 struct ca_msg *hw_buffer;
398 if ((hw_buffer = (struct ca_msg *) kmalloc(sizeof (struct ca_msg), GFP_KERNEL)) == NULL) {
399 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
402 dprintk(verbose, DST_CA_DEBUG, 1, " ");
404 if (copy_from_user(p_ca_message, (void *)arg, sizeof (struct ca_msg))) {
406 goto free_mem_and_exit;
410 if (p_ca_message->msg) {
411 ca_message_header_len = p_ca_message->length; /* Restore it back when you are done */
415 for (i = 0; i < 3; i++) {
416 command = command | p_ca_message->msg[i];
418 command = command << 8;
420 dprintk(verbose, DST_CA_DEBUG, 1, " Command=[0x%x]\n", command);
424 dprintk(verbose, DST_CA_DEBUG, 1, "Command = SEND_CA_PMT");
425 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, 0)) < 0) { // code simplification started
426 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT Failed !");
428 goto free_mem_and_exit;
430 dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT Success !");
433 dprintk(verbose, DST_CA_INFO, 1, "Command = CA_PMT_REPLY");
434 /* Have to handle the 2 basic types of cards here */
435 if ((dst_check_ca_pmt(state, p_ca_message, hw_buffer)) < 0) {
436 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT_REPLY Failed !");
438 goto free_mem_and_exit;
440 dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT_REPLY Success !");
442 case CA_APP_INFO_ENQUIRY: // only for debugging
443 dprintk(verbose, DST_CA_INFO, 1, " Getting Cam Application information");
445 if ((ca_get_app_info(state)) < 0) {
446 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_APP_INFO_ENQUIRY Failed !");
448 goto free_mem_and_exit;
450 dprintk(verbose, DST_CA_INFO, 1, " -->CA_APP_INFO_ENQUIRY Success !");
460 static int dst_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long ioctl_arg)
462 struct dvb_device* dvbdev = (struct dvb_device*) file->private_data;
463 struct dst_state* state = (struct dst_state*) dvbdev->priv;
464 struct ca_slot_info *p_ca_slot_info;
465 struct ca_caps *p_ca_caps;
466 struct ca_msg *p_ca_message;
467 void __user *arg = (void __user *)ioctl_arg;
470 if ((p_ca_message = (struct ca_msg *) kmalloc(sizeof (struct ca_msg), GFP_KERNEL)) == NULL) {
471 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
474 if ((p_ca_slot_info = (struct ca_slot_info *) kmalloc(sizeof (struct ca_slot_info), GFP_KERNEL)) == NULL) {
475 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
478 if ((p_ca_caps = (struct ca_caps *) kmalloc(sizeof (struct ca_caps), GFP_KERNEL)) == NULL) {
479 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
482 /* We have now only the standard ioctl's, the driver is upposed to handle internals. */
485 dprintk(verbose, DST_CA_INFO, 1, " Sending message");
486 if ((ca_send_message(state, p_ca_message, arg)) < 0) {
487 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SEND_MSG Failed !");
489 goto free_mem_and_exit;
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 !");
497 goto free_mem_and_exit;
499 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_MSG Success !");
502 dprintk(verbose, DST_CA_ERROR, 1, " Resetting DST");
503 dst_error_bailout(state);
506 case CA_GET_SLOT_INFO:
507 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot info");
508 if ((ca_get_slot_info(state, p_ca_slot_info, arg)) < 0) {
509 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_SLOT_INFO Failed !");
511 goto free_mem_and_exit;
513 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_SLOT_INFO Success !");
516 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot capabilities");
517 if ((ca_get_slot_caps(state, p_ca_caps, arg)) < 0) {
518 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_CAP Failed !");
520 goto free_mem_and_exit;
522 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_CAP Success !");
524 case CA_GET_DESCR_INFO:
525 dprintk(verbose, DST_CA_INFO, 1, " Getting descrambler description");
526 if ((ca_get_slot_descr(state, p_ca_message, arg)) < 0) {
527 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_DESCR_INFO Failed !");
529 goto free_mem_and_exit;
531 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_DESCR_INFO Success !");
534 dprintk(verbose, DST_CA_INFO, 1, " Setting descrambler");
535 if ((ca_set_slot_descr()) < 0) {
536 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_DESCR Failed !");
538 goto free_mem_and_exit;
540 dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_DESCR Success !");
543 dprintk(verbose, DST_CA_INFO, 1, " Setting PID");
544 if ((ca_set_pid()) < 0) {
545 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_PID Failed !");
547 goto free_mem_and_exit;
549 dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_PID Success !");
551 result = -EOPNOTSUPP;
554 kfree (p_ca_message);
555 kfree (p_ca_slot_info);
561 static int dst_ca_open(struct inode *inode, struct file *file)
563 dprintk(verbose, DST_CA_DEBUG, 1, " Device opened [%p] ", file);
564 try_module_get(THIS_MODULE);
569 static int dst_ca_release(struct inode *inode, struct file *file)
571 dprintk(verbose, DST_CA_DEBUG, 1, " Device closed.");
572 module_put(THIS_MODULE);
577 static int dst_ca_read(struct file *file, char __user *buffer, size_t length, loff_t *offset)
581 dprintk(verbose, DST_CA_DEBUG, 1, " Device read.");
586 static int dst_ca_write(struct file *file, const char __user *buffer, size_t length, loff_t *offset)
588 dprintk(verbose, DST_CA_DEBUG, 1, " Device write.");
593 static struct file_operations dst_ca_fops = {
594 .owner = THIS_MODULE,
595 .ioctl = dst_ca_ioctl,
597 .release = dst_ca_release,
599 .write = dst_ca_write
602 static struct dvb_device dvbdev_ca = {
610 int dst_ca_attach(struct dst_state *dst, struct dvb_adapter *dvb_adapter)
612 struct dvb_device *dvbdev;
613 dprintk(verbose, DST_CA_ERROR, 1, "registering DST-CA device");
614 dvb_register_device(dvb_adapter, &dvbdev, &dvbdev_ca, dst, DVB_DEVICE_CA);
618 EXPORT_SYMBOL(dst_ca_attach);
620 MODULE_DESCRIPTION("DST DVB-S/T/C Combo CA driver");
621 MODULE_AUTHOR("Manu Abraham");
622 MODULE_LICENSE("GPL");