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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 CA-driver for TwinHan DST Frontend/Card4 5 Copyright (C) 2004, 2005 Manu Abraham (manu@kromtek.com)6 7*/8 9#include <linux/kernel.h>10#include <linux/module.h>11#include <linux/slab.h>12#include <linux/init.h>13#include <linux/mutex.h>14#include <linux/string.h>15#include <linux/dvb/ca.h>16#include <media/dvbdev.h>17#include <media/dvb_frontend.h>18#include "dst_ca.h"19#include "dst_common.h"20 21#define DST_CA_ERROR 022#define DST_CA_NOTICE 123#define DST_CA_INFO 224#define DST_CA_DEBUG 325 26#define dprintk(x, y, z, format, arg...) do { \27 if (z) { \28 if ((x > DST_CA_ERROR) && (x > y)) \29 printk(KERN_ERR "%s: " format "\n", __func__ , ##arg); \30 else if ((x > DST_CA_NOTICE) && (x > y)) \31 printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg); \32 else if ((x > DST_CA_INFO) && (x > y)) \33 printk(KERN_INFO "%s: " format "\n", __func__ , ##arg); \34 else if ((x > DST_CA_DEBUG) && (x > y)) \35 printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg); \36 } else { \37 if (x > y) \38 printk(format, ## arg); \39 } \40} while(0)41 42 43static DEFINE_MUTEX(dst_ca_mutex);44static unsigned int verbose = 5;45module_param(verbose, int, 0644);46MODULE_PARM_DESC(verbose, "verbose startup messages, default is 1 (yes)");47 48static void put_command_and_length(u8 *data, int command, int length)49{50 data[0] = (command >> 16) & 0xff;51 data[1] = (command >> 8) & 0xff;52 data[2] = command & 0xff;53 data[3] = length;54}55 56static void put_checksum(u8 *check_string, int length)57{58 dprintk(verbose, DST_CA_DEBUG, 1, " Computing string checksum.");59 dprintk(verbose, DST_CA_DEBUG, 1, " -> string length : 0x%02x", length);60 check_string[length] = dst_check_sum (check_string, length);61 dprintk(verbose, DST_CA_DEBUG, 1, " -> checksum : 0x%02x", check_string[length]);62}63 64static int dst_ci_command(struct dst_state* state, u8 * data, u8 *ca_string, u8 len, int read)65{66 u8 reply;67 68 mutex_lock(&state->dst_mutex);69 dst_comm_init(state);70 msleep(65);71 72 if (write_dst(state, data, len)) {73 dprintk(verbose, DST_CA_INFO, 1, " Write not successful, trying to recover");74 dst_error_recovery(state);75 goto error;76 }77 if ((dst_pio_disable(state)) < 0) {78 dprintk(verbose, DST_CA_ERROR, 1, " DST PIO disable failed.");79 goto error;80 }81 if (read_dst(state, &reply, GET_ACK) < 0) {82 dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");83 dst_error_recovery(state);84 goto error;85 }86 if (read) {87 if (! dst_wait_dst_ready(state, LONG_DELAY)) {88 dprintk(verbose, DST_CA_NOTICE, 1, " 8820 not ready");89 goto error;90 }91 if (read_dst(state, ca_string, 128) < 0) { /* Try to make this dynamic */92 dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");93 dst_error_recovery(state);94 goto error;95 }96 }97 mutex_unlock(&state->dst_mutex);98 return 0;99 100error:101 mutex_unlock(&state->dst_mutex);102 return -EIO;103}104 105 106static int dst_put_ci(struct dst_state *state, u8 *data, int len, u8 *ca_string, int read)107{108 u8 dst_ca_comm_err = 0;109 110 while (dst_ca_comm_err < RETRIES) {111 dprintk(verbose, DST_CA_NOTICE, 1, " Put Command");112 if (dst_ci_command(state, data, ca_string, len, read)) { // If error113 dst_error_recovery(state);114 dst_ca_comm_err++; // work required here.115 } else {116 break;117 }118 }119 120 if(dst_ca_comm_err == RETRIES)121 return -EIO;122 123 return 0;124}125 126 127 128static int ca_get_app_info(struct dst_state *state)129{130 int length, str_length;131 static u8 command[8] = {0x07, 0x40, 0x01, 0x00, 0x01, 0x00, 0x00, 0xff};132 133 put_checksum(&command[0], command[0]);134 if ((dst_put_ci(state, command, sizeof(command), state->messages, GET_REPLY)) < 0) {135 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");136 return -EIO;137 }138 dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");139 dprintk(verbose, DST_CA_INFO, 1, " ================================ CI Module Application Info ======================================");140 dprintk(verbose, DST_CA_INFO, 1, " Application Type=[%d], Application Vendor=[%d], Vendor Code=[%d]\n%s: Application info=[%s]",141 state->messages[7], (state->messages[8] << 8) | state->messages[9],142 (state->messages[10] << 8) | state->messages[11], __func__, (char *)(&state->messages[12]));143 dprintk(verbose, DST_CA_INFO, 1, " ==================================================================================================");144 145 // Transform dst message to correct application_info message146 length = state->messages[5];147 str_length = length - 6;148 if (str_length < 0) {149 str_length = 0;150 dprintk(verbose, DST_CA_ERROR, 1, "Invalid string length returned in ca_get_app_info(). Recovering.");151 }152 153 // First, the command and length fields154 put_command_and_length(&state->messages[0], CA_APP_INFO, length);155 156 // Copy application_type, application_manufacturer and manufacturer_code157 memmove(&state->messages[4], &state->messages[7], 5);158 159 // Set string length and copy string160 state->messages[9] = str_length;161 memmove(&state->messages[10], &state->messages[12], str_length);162 163 return 0;164}165 166static int ca_get_ca_info(struct dst_state *state)167{168 int srcPtr, dstPtr, i, num_ids;169 static u8 slot_command[8] = {0x07, 0x40, 0x00, 0x00, 0x02, 0x00, 0x00, 0xff};170 const int in_system_id_pos = 8, out_system_id_pos = 4, in_num_ids_pos = 7;171 172 put_checksum(&slot_command[0], slot_command[0]);173 if ((dst_put_ci(state, slot_command, sizeof (slot_command), state->messages, GET_REPLY)) < 0) {174 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");175 return -EIO;176 }177 dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");178 179 // Print raw data180 dprintk(verbose, DST_CA_INFO, 0, " DST data = [");181 for (i = 0; i < state->messages[0] + 1; i++) {182 dprintk(verbose, DST_CA_INFO, 0, " 0x%02x", state->messages[i]);183 }184 dprintk(verbose, DST_CA_INFO, 0, "]\n");185 186 // Set the command and length of the output187 num_ids = state->messages[in_num_ids_pos];188 if (num_ids >= 100) {189 num_ids = 100;190 dprintk(verbose, DST_CA_ERROR, 1, "Invalid number of ids (>100). Recovering.");191 }192 put_command_and_length(&state->messages[0], CA_INFO, num_ids * 2);193 194 dprintk(verbose, DST_CA_INFO, 0, " CA_INFO = [");195 srcPtr = in_system_id_pos;196 dstPtr = out_system_id_pos;197 for(i = 0; i < num_ids; i++) {198 dprintk(verbose, DST_CA_INFO, 0, " 0x%02x%02x", state->messages[srcPtr + 0], state->messages[srcPtr + 1]);199 // Append to output200 state->messages[dstPtr + 0] = state->messages[srcPtr + 0];201 state->messages[dstPtr + 1] = state->messages[srcPtr + 1];202 srcPtr += 2;203 dstPtr += 2;204 }205 dprintk(verbose, DST_CA_INFO, 0, "]\n");206 207 return 0;208}209 210static int ca_get_slot_caps(struct dst_state *state, struct ca_caps *p_ca_caps, void __user *arg)211{212 int i;213 u8 slot_cap[256];214 static u8 slot_command[8] = {0x07, 0x40, 0x02, 0x00, 0x02, 0x00, 0x00, 0xff};215 216 put_checksum(&slot_command[0], slot_command[0]);217 if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_cap, GET_REPLY)) < 0) {218 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");219 return -EIO;220 }221 dprintk(verbose, DST_CA_NOTICE, 1, " -->dst_put_ci SUCCESS !");222 223 /* Will implement the rest soon */224 225 dprintk(verbose, DST_CA_INFO, 1, " Slot cap = [%d]", slot_cap[7]);226 dprintk(verbose, DST_CA_INFO, 0, "===================================\n");227 for (i = 0; i < slot_cap[0] + 1; i++)228 dprintk(verbose, DST_CA_INFO, 0, " %d", slot_cap[i]);229 dprintk(verbose, DST_CA_INFO, 0, "\n");230 231 p_ca_caps->slot_num = 1;232 p_ca_caps->slot_type = 1;233 p_ca_caps->descr_num = slot_cap[7];234 p_ca_caps->descr_type = 1;235 236 if (copy_to_user(arg, p_ca_caps, sizeof (struct ca_caps)))237 return -EFAULT;238 239 return 0;240}241 242/* Need some more work */243static int ca_get_slot_descr(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)244{245 return -EOPNOTSUPP;246}247 248 249static int ca_get_slot_info(struct dst_state *state, struct ca_slot_info *p_ca_slot_info, void __user *arg)250{251 int i;252 static u8 slot_command[8] = {0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff};253 254 u8 *slot_info = state->messages;255 256 put_checksum(&slot_command[0], 7);257 if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_info, GET_REPLY)) < 0) {258 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");259 return -EIO;260 }261 dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");262 263 /* Will implement the rest soon */264 265 dprintk(verbose, DST_CA_INFO, 1, " Slot info = [%d]", slot_info[3]);266 dprintk(verbose, DST_CA_INFO, 0, "===================================\n");267 for (i = 0; i < 8; i++)268 dprintk(verbose, DST_CA_INFO, 0, " %d", slot_info[i]);269 dprintk(verbose, DST_CA_INFO, 0, "\n");270 271 if (slot_info[4] & 0x80) {272 p_ca_slot_info->flags = CA_CI_MODULE_PRESENT;273 p_ca_slot_info->num = 1;274 p_ca_slot_info->type = CA_CI;275 } else if (slot_info[4] & 0x40) {276 p_ca_slot_info->flags = CA_CI_MODULE_READY;277 p_ca_slot_info->num = 1;278 p_ca_slot_info->type = CA_CI;279 } else280 p_ca_slot_info->flags = 0;281 282 if (copy_to_user(arg, p_ca_slot_info, sizeof (struct ca_slot_info)))283 return -EFAULT;284 285 return 0;286}287 288 289static int ca_get_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)290{291 u8 i = 0;292 u32 command = 0;293 294 if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg)))295 return -EFAULT;296 297 dprintk(verbose, DST_CA_NOTICE, 1, " Message = [%*ph]",298 3, p_ca_message->msg);299 300 for (i = 0; i < 3; i++) {301 command = command | p_ca_message->msg[i];302 if (i < 2)303 command = command << 8;304 }305 dprintk(verbose, DST_CA_NOTICE, 1, " Command=[0x%x]", command);306 307 switch (command) {308 case CA_APP_INFO:309 memcpy(p_ca_message->msg, state->messages, 128);310 if (copy_to_user(arg, p_ca_message, sizeof (struct ca_msg)) )311 return -EFAULT;312 break;313 case CA_INFO:314 memcpy(p_ca_message->msg, state->messages, 128);315 if (copy_to_user(arg, p_ca_message, sizeof (struct ca_msg)) )316 return -EFAULT;317 break;318 }319 320 return 0;321}322 323static int handle_dst_tag(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u32 length)324{325 if (state->dst_hw_cap & DST_TYPE_HAS_SESSION) {326 hw_buffer->msg[2] = p_ca_message->msg[1]; /* MSB */327 hw_buffer->msg[3] = p_ca_message->msg[2]; /* LSB */328 } else {329 if (length > 247) {330 dprintk(verbose, DST_CA_ERROR, 1, " Message too long ! *** Bailing Out *** !");331 return -EIO;332 }333 hw_buffer->msg[0] = (length & 0xff) + 7;334 hw_buffer->msg[1] = 0x40;335 hw_buffer->msg[2] = 0x03;336 hw_buffer->msg[3] = 0x00;337 hw_buffer->msg[4] = 0x03;338 hw_buffer->msg[5] = length & 0xff;339 hw_buffer->msg[6] = 0x00;340 341 /*342 * Need to compute length for EN50221 section 8.3.2, for the time being343 * assuming 8.3.2 is not applicable344 */345 memcpy(&hw_buffer->msg[7], &p_ca_message->msg[4], length);346 }347 348 return 0;349}350 351static int write_to_8820(struct dst_state *state, struct ca_msg *hw_buffer, u8 length, u8 reply)352{353 if ((dst_put_ci(state, hw_buffer->msg, length, hw_buffer->msg, reply)) < 0) {354 dprintk(verbose, DST_CA_ERROR, 1, " DST-CI Command failed.");355 dprintk(verbose, DST_CA_NOTICE, 1, " Resetting DST.");356 rdc_reset_state(state);357 return -EIO;358 }359 dprintk(verbose, DST_CA_NOTICE, 1, " DST-CI Command success.");360 361 return 0;362}363 364static u32 asn_1_decode(u8 *asn_1_array)365{366 u8 length_field = 0, word_count = 0, count = 0;367 u32 length = 0;368 369 length_field = asn_1_array[0];370 dprintk(verbose, DST_CA_DEBUG, 1, " Length field=[%02x]", length_field);371 if (length_field < 0x80) {372 length = length_field & 0x7f;373 dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%02x]\n", length);374 } else {375 word_count = length_field & 0x7f;376 for (count = 0; count < word_count; count++) {377 length = length << 8;378 length += asn_1_array[count + 1];379 dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%04x]", length);380 }381 }382 return length;383}384 385static int debug_string(u8 *msg, u32 length, u32 offset)386{387 u32 i;388 389 dprintk(verbose, DST_CA_DEBUG, 0, " String=[ ");390 for (i = offset; i < length; i++)391 dprintk(verbose, DST_CA_DEBUG, 0, "%02x ", msg[i]);392 dprintk(verbose, DST_CA_DEBUG, 0, "]\n");393 394 return 0;395}396 397 398static int ca_set_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u8 reply, u8 query)399{400 u32 length = 0;401 u8 tag_length = 8;402 403 length = asn_1_decode(&p_ca_message->msg[3]);404 dprintk(verbose, DST_CA_DEBUG, 1, " CA Message length=[%d]", length);405 debug_string(&p_ca_message->msg[4], length, 0); /* length is excluding tag & length */406 407 memset(hw_buffer->msg, '\0', length);408 handle_dst_tag(state, p_ca_message, hw_buffer, length);409 put_checksum(hw_buffer->msg, hw_buffer->msg[0]);410 411 debug_string(hw_buffer->msg, (length + tag_length), 0); /* tags too */412 write_to_8820(state, hw_buffer, (length + tag_length), reply);413 414 return 0;415}416 417 418/* Board supports CA PMT reply ? */419static int dst_check_ca_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer)420{421 int ca_pmt_reply_test = 0;422 423 /* Do test board */424 /* Not there yet but soon */425 426 /* CA PMT Reply capable */427 if (ca_pmt_reply_test) {428 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 1, GET_REPLY)) < 0) {429 dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");430 return -EIO;431 }432 433 /* Process CA PMT Reply */434 /* will implement soon */435 dprintk(verbose, DST_CA_ERROR, 1, " Not there yet");436 }437 /* CA PMT Reply not capable */438 if (!ca_pmt_reply_test) {439 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, NO_REPLY)) < 0) {440 dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");441 return -EIO;442 }443 dprintk(verbose, DST_CA_NOTICE, 1, " ca_set_pmt.. success !");444 /* put a dummy message */445 446 }447 return 0;448}449 450static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)451{452 int i;453 u32 command;454 struct ca_msg *hw_buffer;455 int result = 0;456 457 hw_buffer = kmalloc(sizeof(*hw_buffer), GFP_KERNEL);458 if (!hw_buffer)459 return -ENOMEM;460 dprintk(verbose, DST_CA_DEBUG, 1, " ");461 462 if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg))) {463 result = -EFAULT;464 goto free_mem_and_exit;465 }466 467 /* EN50221 tag */468 command = 0;469 470 for (i = 0; i < 3; i++) {471 command = command | p_ca_message->msg[i];472 if (i < 2)473 command = command << 8;474 }475 dprintk(verbose, DST_CA_DEBUG, 1, " Command=[0x%x]\n", command);476 477 switch (command) {478 case CA_PMT:479 dprintk(verbose, DST_CA_DEBUG, 1, "Command = SEND_CA_PMT");480 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, 0)) < 0) { // code simplification started481 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT Failed !");482 result = -1;483 goto free_mem_and_exit;484 }485 dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT Success !");486 break;487 case CA_PMT_REPLY:488 dprintk(verbose, DST_CA_INFO, 1, "Command = CA_PMT_REPLY");489 /* Have to handle the 2 basic types of cards here */490 if ((dst_check_ca_pmt(state, p_ca_message, hw_buffer)) < 0) {491 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT_REPLY Failed !");492 result = -1;493 goto free_mem_and_exit;494 }495 dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT_REPLY Success !");496 break;497 case CA_APP_INFO_ENQUIRY: // only for debugging498 dprintk(verbose, DST_CA_INFO, 1, " Getting Cam Application information");499 500 if ((ca_get_app_info(state)) < 0) {501 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_APP_INFO_ENQUIRY Failed !");502 result = -1;503 goto free_mem_and_exit;504 }505 dprintk(verbose, DST_CA_INFO, 1, " -->CA_APP_INFO_ENQUIRY Success !");506 break;507 case CA_INFO_ENQUIRY:508 dprintk(verbose, DST_CA_INFO, 1, " Getting CA Information");509 510 if ((ca_get_ca_info(state)) < 0) {511 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_INFO_ENQUIRY Failed !");512 result = -1;513 goto free_mem_and_exit;514 }515 dprintk(verbose, DST_CA_INFO, 1, " -->CA_INFO_ENQUIRY Success !");516 break;517 }518 519free_mem_and_exit:520 kfree (hw_buffer);521 522 return result;523}524 525static long dst_ca_ioctl(struct file *file, unsigned int cmd, unsigned long ioctl_arg)526{527 struct dvb_device *dvbdev;528 struct dst_state *state;529 struct ca_slot_info *p_ca_slot_info;530 struct ca_caps *p_ca_caps;531 struct ca_msg *p_ca_message;532 void __user *arg = (void __user *)ioctl_arg;533 int result = 0;534 535 mutex_lock(&dst_ca_mutex);536 dvbdev = file->private_data;537 state = dvbdev->priv;538 p_ca_message = kmalloc(sizeof (struct ca_msg), GFP_KERNEL);539 p_ca_slot_info = kmalloc(sizeof (struct ca_slot_info), GFP_KERNEL);540 p_ca_caps = kmalloc(sizeof (struct ca_caps), GFP_KERNEL);541 if (!p_ca_message || !p_ca_slot_info || !p_ca_caps) {542 result = -ENOMEM;543 goto free_mem_and_exit;544 }545 546 /* We have now only the standard ioctl's, the driver is upposed to handle internals. */547 switch (cmd) {548 case CA_SEND_MSG:549 dprintk(verbose, DST_CA_INFO, 1, " Sending message");550 result = ca_send_message(state, p_ca_message, arg);551 552 if (result < 0) {553 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SEND_MSG Failed !");554 goto free_mem_and_exit;555 }556 break;557 case CA_GET_MSG:558 dprintk(verbose, DST_CA_INFO, 1, " Getting message");559 result = ca_get_message(state, p_ca_message, arg);560 if (result < 0) {561 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_MSG Failed !");562 goto free_mem_and_exit;563 }564 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_MSG Success !");565 break;566 case CA_RESET:567 dprintk(verbose, DST_CA_ERROR, 1, " Resetting DST");568 dst_error_bailout(state);569 msleep(4000);570 break;571 case CA_GET_SLOT_INFO:572 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot info");573 result = ca_get_slot_info(state, p_ca_slot_info, arg);574 if (result < 0) {575 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_SLOT_INFO Failed !");576 result = -1;577 goto free_mem_and_exit;578 }579 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_SLOT_INFO Success !");580 break;581 case CA_GET_CAP:582 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot capabilities");583 result = ca_get_slot_caps(state, p_ca_caps, arg);584 if (result < 0) {585 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_CAP Failed !");586 goto free_mem_and_exit;587 }588 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_CAP Success !");589 break;590 case CA_GET_DESCR_INFO:591 dprintk(verbose, DST_CA_INFO, 1, " Getting descrambler description");592 result = ca_get_slot_descr(state, p_ca_message, arg);593 if (result < 0) {594 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_DESCR_INFO Failed !");595 goto free_mem_and_exit;596 }597 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_DESCR_INFO Success !");598 break;599 default:600 result = -EOPNOTSUPP;601 }602 free_mem_and_exit:603 kfree (p_ca_message);604 kfree (p_ca_slot_info);605 kfree (p_ca_caps);606 607 mutex_unlock(&dst_ca_mutex);608 return result;609}610 611static int dst_ca_open(struct inode *inode, struct file *file)612{613 dprintk(verbose, DST_CA_DEBUG, 1, " Device opened [%p] ", file);614 615 return 0;616}617 618static int dst_ca_release(struct inode *inode, struct file *file)619{620 dprintk(verbose, DST_CA_DEBUG, 1, " Device closed.");621 622 return 0;623}624 625static ssize_t dst_ca_read(struct file *file, char __user *buffer, size_t length, loff_t *offset)626{627 dprintk(verbose, DST_CA_DEBUG, 1, " Device read.");628 629 return 0;630}631 632static ssize_t dst_ca_write(struct file *file, const char __user *buffer, size_t length, loff_t *offset)633{634 dprintk(verbose, DST_CA_DEBUG, 1, " Device write.");635 636 return 0;637}638 639static const struct file_operations dst_ca_fops = {640 .owner = THIS_MODULE,641 .unlocked_ioctl = dst_ca_ioctl,642 .open = dst_ca_open,643 .release = dst_ca_release,644 .read = dst_ca_read,645 .write = dst_ca_write,646 .llseek = noop_llseek,647};648 649static struct dvb_device dvbdev_ca = {650 .priv = NULL,651 .users = 1,652 .readers = 1,653 .writers = 1,654 .fops = &dst_ca_fops655};656 657struct dvb_device *dst_ca_attach(struct dst_state *dst, struct dvb_adapter *dvb_adapter)658{659 struct dvb_device *dvbdev;660 661 dprintk(verbose, DST_CA_ERROR, 1, "registering DST-CA device");662 if (dvb_register_device(dvb_adapter, &dvbdev, &dvbdev_ca, dst,663 DVB_DEVICE_CA, 0) == 0) {664 dst->dst_ca = dvbdev;665 return dst->dst_ca;666 }667 668 return NULL;669}670 671EXPORT_SYMBOL_GPL(dst_ca_attach);672 673MODULE_DESCRIPTION("DST DVB-S/T/C Combo CA driver");674MODULE_AUTHOR("Manu Abraham");675MODULE_LICENSE("GPL");676