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)
84 down(&state->dst_mutex);
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);
93 if ((dst_pio_disable(state)) < 0) {
94 dprintk(verbose, DST_CA_ERROR, 1, " DST PIO disable failed.");
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);
103 if (! dst_wait_dst_ready(state, LONG_DELAY)) {
104 dprintk(verbose, DST_CA_NOTICE, 1, " 8820 not ready");
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);
113 up(&state->dst_mutex);
117 up(&state->dst_mutex);
122 static int dst_put_ci(struct dst_state *state, u8 *data, int len, u8 *ca_string, int read)
124 u8 dst_ca_comm_err = 0;
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.
141 static int ca_get_app_info(struct dst_state *state)
143 static u8 command[8] = {0x07, 0x40, 0x01, 0x00, 0x01, 0x00, 0x00, 0xff};
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 !");
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, " ==================================================================================================");
160 static int ca_get_slot_caps(struct dst_state *state, struct ca_caps *p_ca_caps, void __user *arg)
164 static u8 slot_command[8] = {0x07, 0x40, 0x02, 0x00, 0x02, 0x00, 0x00, 0xff};
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 !");
171 dprintk(verbose, DST_CA_NOTICE, 1, " -->dst_put_ci SUCCESS !");
173 /* Will implement the rest soon */
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");
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;
186 if (copy_to_user(arg, p_ca_caps, sizeof (struct ca_caps)))
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)
199 static int ca_get_slot_info(struct dst_state *state, struct ca_slot_info *p_ca_slot_info, void __user *arg)
202 static u8 slot_command[8] = {0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff};
204 u8 *slot_info = state->messages;
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 !");
211 dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
213 /* Will implement the rest soon */
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");
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;
230 p_ca_slot_info->flags = 0;
232 if (copy_to_user(arg, p_ca_slot_info, sizeof (struct ca_slot_info)))
239 static int ca_get_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
244 if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg)))
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]);
250 for (i = 0; i < 3; i++) {
251 command = command | p_ca_message->msg[i];
253 command = command << 8;
255 dprintk(verbose, DST_CA_NOTICE, 1, " Command=[0x%x]", command);
259 memcpy(p_ca_message->msg, state->messages, 128);
260 if (copy_to_user(arg, p_ca_message, sizeof (struct ca_msg)) )
269 static int handle_dst_tag(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u32 length)
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 */
276 dprintk(verbose, DST_CA_ERROR, 1, " Message too long ! *** Bailing Out *** !");
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;
287 * Need to compute length for EN50221 section 8.3.2, for the time being
288 * assuming 8.3.2 is not applicable
290 memcpy(&hw_buffer->msg[7], &p_ca_message->msg[4], length);
296 static int write_to_8820(struct dst_state *state, struct ca_msg *hw_buffer, u8 length, u8 reply)
298 if ((dst_put_ci(state, hw_buffer->msg, length, hw_buffer->msg, reply)) < 0) {
299 dprintk(verbose, DST_CA_ERROR, 1, " DST-CI Command failed.");
300 dprintk(verbose, DST_CA_NOTICE, 1, " Resetting DST.");
301 rdc_reset_state(state);
304 dprintk(verbose, DST_CA_NOTICE, 1, " DST-CI Command succes.");
309 static u32 asn_1_decode(u8 *asn_1_array)
311 u8 length_field = 0, word_count = 0, count = 0;
314 length_field = asn_1_array[0];
315 dprintk(verbose, DST_CA_DEBUG, 1, " Length field=[%02x]", length_field);
316 if (length_field < 0x80) {
317 length = length_field & 0x7f;
318 dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%02x]\n", length);
320 word_count = length_field & 0x7f;
321 for (count = 0; count < word_count; count++) {
322 length = length << 8;
323 length += asn_1_array[count + 1];
324 dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%04x]", length);
330 static int debug_string(u8 *msg, u32 length, u32 offset)
334 dprintk(verbose, DST_CA_DEBUG, 0, " String=[ ");
335 for (i = offset; i < length; i++)
336 dprintk(verbose, DST_CA_DEBUG, 0, "%02x ", msg[i]);
337 dprintk(verbose, DST_CA_DEBUG, 0, "]\n");
342 static int ca_set_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u8 reply, u8 query)
347 length = asn_1_decode(&p_ca_message->msg[3]);
348 dprintk(verbose, DST_CA_DEBUG, 1, " CA Message length=[%d]", length);
349 debug_string(&p_ca_message->msg[4], length, 0); /* length is excluding tag & length */
351 memset(hw_buffer->msg, '\0', length);
352 handle_dst_tag(state, p_ca_message, hw_buffer, length);
353 put_checksum(hw_buffer->msg, hw_buffer->msg[0]);
355 debug_string(hw_buffer->msg, (length + tag_length), 0); /* tags too */
356 write_to_8820(state, hw_buffer, (length + tag_length), reply);
362 /* Board supports CA PMT reply ? */
363 static int dst_check_ca_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer)
365 int ca_pmt_reply_test = 0;
368 /* Not there yet but soon */
370 /* CA PMT Reply capable */
371 if (ca_pmt_reply_test) {
372 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 1, GET_REPLY)) < 0) {
373 dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
377 /* Process CA PMT Reply */
378 /* will implement soon */
379 dprintk(verbose, DST_CA_ERROR, 1, " Not there yet");
381 /* CA PMT Reply not capable */
382 if (!ca_pmt_reply_test) {
383 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, NO_REPLY)) < 0) {
384 dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
387 dprintk(verbose, DST_CA_NOTICE, 1, " ca_set_pmt.. success !");
388 /* put a dummy message */
394 static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
397 unsigned int ca_message_header_len;
400 struct ca_msg *hw_buffer;
403 if ((hw_buffer = (struct ca_msg *) kmalloc(sizeof (struct ca_msg), GFP_KERNEL)) == NULL) {
404 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
407 dprintk(verbose, DST_CA_DEBUG, 1, " ");
409 if (copy_from_user(p_ca_message, (void *)arg, sizeof (struct ca_msg))) {
411 goto free_mem_and_exit;
415 if (p_ca_message->msg) {
416 ca_message_header_len = p_ca_message->length; /* Restore it back when you are done */
420 for (i = 0; i < 3; i++) {
421 command = command | p_ca_message->msg[i];
423 command = command << 8;
425 dprintk(verbose, DST_CA_DEBUG, 1, " Command=[0x%x]\n", command);
429 dprintk(verbose, DST_CA_DEBUG, 1, "Command = SEND_CA_PMT");
430 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, 0)) < 0) { // code simplification started
431 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT Failed !");
433 goto free_mem_and_exit;
435 dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT Success !");
438 dprintk(verbose, DST_CA_INFO, 1, "Command = CA_PMT_REPLY");
439 /* Have to handle the 2 basic types of cards here */
440 if ((dst_check_ca_pmt(state, p_ca_message, hw_buffer)) < 0) {
441 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT_REPLY Failed !");
443 goto free_mem_and_exit;
445 dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT_REPLY Success !");
447 case CA_APP_INFO_ENQUIRY: // only for debugging
448 dprintk(verbose, DST_CA_INFO, 1, " Getting Cam Application information");
450 if ((ca_get_app_info(state)) < 0) {
451 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_APP_INFO_ENQUIRY Failed !");
453 goto free_mem_and_exit;
455 dprintk(verbose, DST_CA_INFO, 1, " -->CA_APP_INFO_ENQUIRY Success !");
465 static int dst_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long ioctl_arg)
467 struct dvb_device* dvbdev = (struct dvb_device*) file->private_data;
468 struct dst_state* state = (struct dst_state*) dvbdev->priv;
469 struct ca_slot_info *p_ca_slot_info;
470 struct ca_caps *p_ca_caps;
471 struct ca_msg *p_ca_message;
472 void __user *arg = (void __user *)ioctl_arg;
475 if ((p_ca_message = (struct ca_msg *) kmalloc(sizeof (struct ca_msg), GFP_KERNEL)) == NULL) {
476 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
479 if ((p_ca_slot_info = (struct ca_slot_info *) kmalloc(sizeof (struct ca_slot_info), GFP_KERNEL)) == NULL) {
480 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
483 if ((p_ca_caps = (struct ca_caps *) kmalloc(sizeof (struct ca_caps), GFP_KERNEL)) == NULL) {
484 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
487 /* We have now only the standard ioctl's, the driver is upposed to handle internals. */
490 dprintk(verbose, DST_CA_INFO, 1, " Sending message");
491 if ((ca_send_message(state, p_ca_message, arg)) < 0) {
492 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SEND_MSG Failed !");
494 goto free_mem_and_exit;
498 dprintk(verbose, DST_CA_INFO, 1, " Getting message");
499 if ((ca_get_message(state, p_ca_message, arg)) < 0) {
500 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_MSG Failed !");
502 goto free_mem_and_exit;
504 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_MSG Success !");
507 dprintk(verbose, DST_CA_ERROR, 1, " Resetting DST");
508 dst_error_bailout(state);
511 case CA_GET_SLOT_INFO:
512 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot info");
513 if ((ca_get_slot_info(state, p_ca_slot_info, arg)) < 0) {
514 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_SLOT_INFO Failed !");
516 goto free_mem_and_exit;
518 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_SLOT_INFO Success !");
521 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot capabilities");
522 if ((ca_get_slot_caps(state, p_ca_caps, arg)) < 0) {
523 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_CAP Failed !");
525 goto free_mem_and_exit;
527 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_CAP Success !");
529 case CA_GET_DESCR_INFO:
530 dprintk(verbose, DST_CA_INFO, 1, " Getting descrambler description");
531 if ((ca_get_slot_descr(state, p_ca_message, arg)) < 0) {
532 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_DESCR_INFO Failed !");
534 goto free_mem_and_exit;
536 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_DESCR_INFO Success !");
539 dprintk(verbose, DST_CA_INFO, 1, " Setting descrambler");
540 if ((ca_set_slot_descr()) < 0) {
541 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_DESCR Failed !");
543 goto free_mem_and_exit;
545 dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_DESCR Success !");
548 dprintk(verbose, DST_CA_INFO, 1, " Setting PID");
549 if ((ca_set_pid()) < 0) {
550 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_PID Failed !");
552 goto free_mem_and_exit;
554 dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_PID Success !");
556 result = -EOPNOTSUPP;
559 kfree (p_ca_message);
560 kfree (p_ca_slot_info);
566 static int dst_ca_open(struct inode *inode, struct file *file)
568 dprintk(verbose, DST_CA_DEBUG, 1, " Device opened [%p] ", file);
569 try_module_get(THIS_MODULE);
574 static int dst_ca_release(struct inode *inode, struct file *file)
576 dprintk(verbose, DST_CA_DEBUG, 1, " Device closed.");
577 module_put(THIS_MODULE);
582 static int dst_ca_read(struct file *file, char __user *buffer, size_t length, loff_t *offset)
586 dprintk(verbose, DST_CA_DEBUG, 1, " Device read.");
591 static int dst_ca_write(struct file *file, const char __user *buffer, size_t length, loff_t *offset)
593 dprintk(verbose, DST_CA_DEBUG, 1, " Device write.");
598 static struct file_operations dst_ca_fops = {
599 .owner = THIS_MODULE,
600 .ioctl = dst_ca_ioctl,
602 .release = dst_ca_release,
604 .write = dst_ca_write
607 static struct dvb_device dvbdev_ca = {
615 int dst_ca_attach(struct dst_state *dst, struct dvb_adapter *dvb_adapter)
617 struct dvb_device *dvbdev;
618 dprintk(verbose, DST_CA_ERROR, 1, "registering DST-CA device");
619 dvb_register_device(dvb_adapter, &dvbdev, &dvbdev_ca, dst, DVB_DEVICE_CA);
623 EXPORT_SYMBOL(dst_ca_attach);
625 MODULE_DESCRIPTION("DST DVB-S/T/C Combo CA driver");
626 MODULE_AUTHOR("Manu Abraham");
627 MODULE_LICENSE("GPL");