drivers/media/dvb/bt8xx/dst_ca.c

   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/slab.h>
  24 #include <linux/init.h>
  25 #include <linux/smp_lock.h>
  26 #include <linux/string.h>
  27 #include <linux/dvb/ca.h>
  28 #include "dvbdev.h"
  29 #include "dvb_frontend.h"
  30 #include "dst_ca.h"
  31 #include "dst_common.h"
  32
  33 #define DST_CA_ERROR            0
  34 #define DST_CA_NOTICE           1
  35 #define DST_CA_INFO             2
  36 #define DST_CA_DEBUG            3
  37
  38 #define dprintk(x, y, z, format, arg...) do {                                           \
  39         if (z) {                                                                        \
  40                 if      ((x > DST_CA_ERROR) && (x > y))                                 \
  41                         printk(KERN_ERR "%s: " format "\n", __func__ , ##arg);  \
  42                 else if ((x > DST_CA_NOTICE) && (x > y))                                \
  43                         printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg);       \
  44                 else if ((x > DST_CA_INFO) && (x > y))                                  \
  45                         printk(KERN_INFO "%s: " format "\n", __func__ , ##arg); \
  46                 else if ((x > DST_CA_DEBUG) && (x > y))                                 \
  47                         printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg);        \
  48         } else {                                                                        \
  49                 if (x > y)                                                              \
  50                         printk(format, ## arg);                                         \
  51         }                                                                               \
  52 } while(0)
  53
  54
  55 static unsigned int verbose = 5;
  56 module_param(verbose, int, 0644);
  57 MODULE_PARM_DESC(verbose, "verbose startup messages, default is 1 (yes)");
  58
  59 /*      Need some more work     */
  60 static int ca_set_slot_descr(void)
  61 {
  62         /*      We could make this more graceful ?      */
  63         return -EOPNOTSUPP;
  64 }
  65
  66 /*      Need some more work     */
  67 static int ca_set_pid(void)
  68 {
  69         /*      We could make this more graceful ?      */
  70         return -EOPNOTSUPP;
  71 }
  72
  73 static void put_command_and_length(u8 *data, int command, int length)
  74 {
  75         data[0] = (command >> 16) & 0xff;
  76         data[1] = (command >> 8) & 0xff;
  77         data[2] = command & 0xff;
  78         data[3] = length;
  79 }
  80
  81 static void put_checksum(u8 *check_string, int length)
  82 {
  83         dprintk(verbose, DST_CA_DEBUG, 1, " Computing string checksum.");
  84         dprintk(verbose, DST_CA_DEBUG, 1, "  -> string length : 0x%02x", length);
  85         check_string[length] = dst_check_sum (check_string, length);
  86         dprintk(verbose, DST_CA_DEBUG, 1, "  -> checksum      : 0x%02x", check_string[length]);
  87 }
  88
  89 static int dst_ci_command(struct dst_state* state, u8 * data, u8 *ca_string, u8 len, int read)
  90 {
  91         u8 reply;
  92
  93         mutex_lock(&state->dst_mutex);
  94         dst_comm_init(state);
  95         msleep(65);
  96
  97         if (write_dst(state, data, len)) {
  98                 dprintk(verbose, DST_CA_INFO, 1, " Write not successful, trying to recover");
  99                 dst_error_recovery(state);
 100                 goto error;
 101         }
 102         if ((dst_pio_disable(state)) < 0) {
 103                 dprintk(verbose, DST_CA_ERROR, 1, " DST PIO disable failed.");
 104                 goto error;
 105         }
 106         if (read_dst(state, &reply, GET_ACK) < 0) {
 107                 dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
 108                 dst_error_recovery(state);
 109                 goto error;
 110         }
 111         if (read) {
 112                 if (! dst_wait_dst_ready(state, LONG_DELAY)) {
 113                         dprintk(verbose, DST_CA_NOTICE, 1, " 8820 not ready");
 114                         goto error;
 115                 }
 116                 if (read_dst(state, ca_string, 128) < 0) {      /*      Try to make this dynamic        */
 117                         dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
 118                         dst_error_recovery(state);
 119                         goto error;
 120                 }
 121         }
 122         mutex_unlock(&state->dst_mutex);
 123         return 0;
 124
 125 error:
 126         mutex_unlock(&state->dst_mutex);
 127         return -EIO;
 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                 dprintk(verbose, DST_CA_NOTICE, 1, " Put Command");
 137                 if (dst_ci_command(state, data, ca_string, len, read)) {        // If error
 138                         dst_error_recovery(state);
 139                         dst_ca_comm_err++; // work required here.
 140                 } else {
 141                         break;
 142                 }
 143         }
 144
 145         if(dst_ca_comm_err == RETRIES)
 146                 return -1;
 147
 148         return 0;
 149 }
 150
 151
 152
 153 static int ca_get_app_info(struct dst_state *state)
 154 {
 155         int length, str_length;
 156         static u8 command[8] = {0x07, 0x40, 0x01, 0x00, 0x01, 0x00, 0x00, 0xff};
 157
 158         put_checksum(&command[0], command[0]);
 159         if ((dst_put_ci(state, command, sizeof(command), state->messages, GET_REPLY)) < 0) {
 160                 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
 161                 return -1;
 162         }
 163         dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
 164         dprintk(verbose, DST_CA_INFO, 1, " ================================ CI Module Application Info ======================================");
 165         dprintk(verbose, DST_CA_INFO, 1, " Application Type=[%d], Application Vendor=[%d], Vendor Code=[%d]\n%s: Application info=[%s]",
 166                 state->messages[7], (state->messages[8] << 8) | state->messages[9],
 167                 (state->messages[10] << 8) | state->messages[11], __func__, (char *)(&state->messages[12]));
 168         dprintk(verbose, DST_CA_INFO, 1, " ==================================================================================================");
 169
 170         // Transform dst message to correct application_info message
 171         length = state->messages[5];
 172         str_length = length - 6;
 173         if (str_length < 0) {
 174                 str_length = 0;
 175                 dprintk(verbose, DST_CA_ERROR, 1, "Invalid string length returned in ca_get_app_info(). Recovering.");
 176         }
 177
 178         // First, the command and length fields
 179         put_command_and_length(&state->messages[0], CA_APP_INFO, length);
 180
 181         // Copy application_type, application_manufacturer and manufacturer_code
 182         memcpy(&state->messages[4], &state->messages[7], 5);
 183
 184         // Set string length and copy string
 185         state->messages[9] = str_length;
 186         memcpy(&state->messages[10], &state->messages[12], str_length);
 187
 188         return 0;
 189 }
 190
 191 static int ca_get_ca_info(struct dst_state *state)
 192 {
 193         int srcPtr, dstPtr, i, num_ids;
 194         static u8 slot_command[8] = {0x07, 0x40, 0x00, 0x00, 0x02, 0x00, 0x00, 0xff};
 195         const int in_system_id_pos = 8, out_system_id_pos = 4, in_num_ids_pos = 7;
 196
 197         put_checksum(&slot_command[0], slot_command[0]);
 198         if ((dst_put_ci(state, slot_command, sizeof (slot_command), state->messages, GET_REPLY)) < 0) {
 199                 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
 200                 return -1;
 201         }
 202         dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
 203
 204         // Print raw data
 205         dprintk(verbose, DST_CA_INFO, 0, " DST data = [");
 206         for (i = 0; i < state->messages[0] + 1; i++) {
 207                 dprintk(verbose, DST_CA_INFO, 0, " 0x%02x", state->messages[i]);
 208         }
 209         dprintk(verbose, DST_CA_INFO, 0, "]\n");
 210
 211         // Set the command and length of the output
 212         num_ids = state->messages[in_num_ids_pos];
 213         if (num_ids >= 100) {
 214                 num_ids = 100;
 215                 dprintk(verbose, DST_CA_ERROR, 1, "Invalid number of ids (>100). Recovering.");
 216         }
 217         put_command_and_length(&state->messages[0], CA_INFO, num_ids * 2);
 218
 219         dprintk(verbose, DST_CA_INFO, 0, " CA_INFO = [");
 220         srcPtr = in_system_id_pos;
 221         dstPtr = out_system_id_pos;
 222         for(i = 0; i < num_ids; i++) {
 223                 dprintk(verbose, DST_CA_INFO, 0, " 0x%02x%02x", state->messages[srcPtr + 0], state->messages[srcPtr + 1]);
 224                 // Append to output
 225                 state->messages[dstPtr + 0] = state->messages[srcPtr + 0];
 226                 state->messages[dstPtr + 1] = state->messages[srcPtr + 1];
 227                 srcPtr += 2;
 228                 dstPtr += 2;
 229         }
 230         dprintk(verbose, DST_CA_INFO, 0, "]\n");
 231
 232         return 0;
 233 }
 234
 235 static int ca_get_slot_caps(struct dst_state *state, struct ca_caps *p_ca_caps, void __user *arg)
 236 {
 237         int i;
 238         u8 slot_cap[256];
 239         static u8 slot_command[8] = {0x07, 0x40, 0x02, 0x00, 0x02, 0x00, 0x00, 0xff};
 240
 241         put_checksum(&slot_command[0], slot_command[0]);
 242         if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_cap, GET_REPLY)) < 0) {
 243                 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
 244                 return -1;
 245         }
 246         dprintk(verbose, DST_CA_NOTICE, 1, " -->dst_put_ci SUCCESS !");
 247
 248         /*      Will implement the rest soon            */
 249
 250         dprintk(verbose, DST_CA_INFO, 1, " Slot cap = [%d]", slot_cap[7]);
 251         dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
 252         for (i = 0; i < slot_cap[0] + 1; i++)
 253                 dprintk(verbose, DST_CA_INFO, 0, " %d", slot_cap[i]);
 254         dprintk(verbose, DST_CA_INFO, 0, "\n");
 255
 256         p_ca_caps->slot_num = 1;
 257         p_ca_caps->slot_type = 1;
 258         p_ca_caps->descr_num = slot_cap[7];
 259         p_ca_caps->descr_type = 1;
 260
 261         if (copy_to_user(arg, p_ca_caps, sizeof (struct ca_caps)))
 262                 return -EFAULT;
 263
 264         return 0;
 265 }
 266
 267 /*      Need some more work     */
 268 static int ca_get_slot_descr(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
 269 {
 270         return -EOPNOTSUPP;
 271 }
 272
 273
 274 static int ca_get_slot_info(struct dst_state *state, struct ca_slot_info *p_ca_slot_info, void __user *arg)
 275 {
 276         int i;
 277         static u8 slot_command[8] = {0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff};
 278
 279         u8 *slot_info = state->messages;
 280
 281         put_checksum(&slot_command[0], 7);
 282         if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_info, GET_REPLY)) < 0) {
 283                 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
 284                 return -1;
 285         }
 286         dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
 287
 288         /*      Will implement the rest soon            */
 289
 290         dprintk(verbose, DST_CA_INFO, 1, " Slot info = [%d]", slot_info[3]);
 291         dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
 292         for (i = 0; i < 8; i++)
 293                 dprintk(verbose, DST_CA_INFO, 0, " %d", slot_info[i]);
 294         dprintk(verbose, DST_CA_INFO, 0, "\n");
 295
 296         if (slot_info[4] & 0x80) {
 297                 p_ca_slot_info->flags = CA_CI_MODULE_PRESENT;
 298                 p_ca_slot_info->num = 1;
 299                 p_ca_slot_info->type = CA_CI;
 300         } else if (slot_info[4] & 0x40) {
 301                 p_ca_slot_info->flags = CA_CI_MODULE_READY;
 302                 p_ca_slot_info->num = 1;
 303                 p_ca_slot_info->type = CA_CI;
 304         } else
 305                 p_ca_slot_info->flags = 0;
 306
 307         if (copy_to_user(arg, p_ca_slot_info, sizeof (struct ca_slot_info)))
 308                 return -EFAULT;
 309
 310         return 0;
 311 }
 312
 313
 314 static int ca_get_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
 315 {
 316         u8 i = 0;
 317         u32 command = 0;
 318
 319         if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg)))
 320                 return -EFAULT;
 321
 322         if (p_ca_message->msg) {
 323                 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]);
 324
 325                 for (i = 0; i < 3; i++) {
 326                         command = command | p_ca_message->msg[i];
 327                         if (i < 2)
 328                                 command = command << 8;
 329                 }
 330                 dprintk(verbose, DST_CA_NOTICE, 1, " Command=[0x%x]", command);
 331
 332                 switch (command) {
 333                 case CA_APP_INFO:
 334                         memcpy(p_ca_message->msg, state->messages, 128);
 335                         if (copy_to_user(arg, p_ca_message, sizeof (struct ca_msg)) )
 336                                 return -EFAULT;
 337                         break;
 338                 case CA_INFO:
 339                         memcpy(p_ca_message->msg, state->messages, 128);
 340                         if (copy_to_user(arg, p_ca_message, sizeof (struct ca_msg)) )
 341                                 return -EFAULT;
 342                         break;
 343                 }
 344         }
 345
 346         return 0;
 347 }
 348
 349 static int handle_dst_tag(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u32 length)
 350 {
 351         if (state->dst_hw_cap & DST_TYPE_HAS_SESSION) {
 352                 hw_buffer->msg[2] = p_ca_message->msg[1];       /*      MSB     */
 353                 hw_buffer->msg[3] = p_ca_message->msg[2];       /*      LSB     */
 354         } else {
 355                 if (length > 247) {
 356                         dprintk(verbose, DST_CA_ERROR, 1, " Message too long ! *** Bailing Out *** !");
 357                         return -1;
 358                 }
 359                 hw_buffer->msg[0] = (length & 0xff) + 7;
 360                 hw_buffer->msg[1] = 0x40;
 361                 hw_buffer->msg[2] = 0x03;
 362                 hw_buffer->msg[3] = 0x00;
 363                 hw_buffer->msg[4] = 0x03;
 364                 hw_buffer->msg[5] = length & 0xff;
 365                 hw_buffer->msg[6] = 0x00;
 366
 367                 /*
 368                  *      Need to compute length for EN50221 section 8.3.2, for the time being
 369                  *      assuming 8.3.2 is not applicable
 370                  */
 371                 memcpy(&hw_buffer->msg[7], &p_ca_message->msg[4], length);
 372         }
 373
 374         return 0;
 375 }
 376
 377 static int write_to_8820(struct dst_state *state, struct ca_msg *hw_buffer, u8 length, u8 reply)
 378 {
 379         if ((dst_put_ci(state, hw_buffer->msg, length, hw_buffer->msg, reply)) < 0) {
 380                 dprintk(verbose, DST_CA_ERROR, 1, " DST-CI Command failed.");
 381                 dprintk(verbose, DST_CA_NOTICE, 1, " Resetting DST.");
 382                 rdc_reset_state(state);
 383                 return -1;
 384         }
 385         dprintk(verbose, DST_CA_NOTICE, 1, " DST-CI Command success.");
 386
 387         return 0;
 388 }
 389
 390 static u32 asn_1_decode(u8 *asn_1_array)
 391 {
 392         u8 length_field = 0, word_count = 0, count = 0;
 393         u32 length = 0;
 394
 395         length_field = asn_1_array[0];
 396         dprintk(verbose, DST_CA_DEBUG, 1, " Length field=[%02x]", length_field);
 397         if (length_field < 0x80) {
 398                 length = length_field & 0x7f;
 399                 dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%02x]\n", length);
 400         } else {
 401                 word_count = length_field & 0x7f;
 402                 for (count = 0; count < word_count; count++) {
 403                         length = length  << 8;
 404                         length += asn_1_array[count + 1];
 405                         dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%04x]", length);
 406                 }
 407         }
 408         return length;
 409 }
 410
 411 static int debug_string(u8 *msg, u32 length, u32 offset)
 412 {
 413         u32 i;
 414
 415         dprintk(verbose, DST_CA_DEBUG, 0, " String=[ ");
 416         for (i = offset; i < length; i++)
 417                 dprintk(verbose, DST_CA_DEBUG, 0, "%02x ", msg[i]);
 418         dprintk(verbose, DST_CA_DEBUG, 0, "]\n");
 419
 420         return 0;
 421 }
 422
 423
 424 static int ca_set_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u8 reply, u8 query)
 425 {
 426         u32 length = 0;
 427         u8 tag_length = 8;
 428
 429         length = asn_1_decode(&p_ca_message->msg[3]);
 430         dprintk(verbose, DST_CA_DEBUG, 1, " CA Message length=[%d]", length);
 431         debug_string(&p_ca_message->msg[4], length, 0); /*      length is excluding tag & length        */
 432
 433         memset(hw_buffer->msg, '\0', length);
 434         handle_dst_tag(state, p_ca_message, hw_buffer, length);
 435         put_checksum(hw_buffer->msg, hw_buffer->msg[0]);
 436
 437         debug_string(hw_buffer->msg, (length + tag_length), 0); /*      tags too        */
 438         write_to_8820(state, hw_buffer, (length + tag_length), reply);
 439
 440         return 0;
 441 }
 442
 443
 444 /*      Board supports CA PMT reply ?           */
 445 static int dst_check_ca_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer)
 446 {
 447         int ca_pmt_reply_test = 0;
 448
 449         /*      Do test board                   */
 450         /*      Not there yet but soon          */
 451
 452         /*      CA PMT Reply capable            */
 453         if (ca_pmt_reply_test) {
 454                 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 1, GET_REPLY)) < 0) {
 455                         dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
 456                         return -1;
 457                 }
 458
 459         /*      Process CA PMT Reply            */
 460         /*      will implement soon             */
 461                 dprintk(verbose, DST_CA_ERROR, 1, " Not there yet");
 462         }
 463         /*      CA PMT Reply not capable        */
 464         if (!ca_pmt_reply_test) {
 465                 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, NO_REPLY)) < 0) {
 466                         dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
 467                         return -1;
 468                 }
 469                 dprintk(verbose, DST_CA_NOTICE, 1, " ca_set_pmt.. success !");
 470         /*      put a dummy message             */
 471
 472         }
 473         return 0;
 474 }
 475
 476 static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
 477 {
 478         int i = 0;
 479         unsigned int ca_message_header_len;
 480
 481         u32 command = 0;
 482         struct ca_msg *hw_buffer;
 483         int result = 0;
 484
 485         if ((hw_buffer = kmalloc(sizeof (struct ca_msg), GFP_KERNEL)) == NULL) {
 486                 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
 487                 return -ENOMEM;
 488         }
 489         dprintk(verbose, DST_CA_DEBUG, 1, " ");
 490
 491         if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg))) {
 492                 result = -EFAULT;
 493                 goto free_mem_and_exit;
 494         }
 495
 496
 497         if (p_ca_message->msg) {
 498                 ca_message_header_len = p_ca_message->length;   /*      Restore it back when you are done       */
 499                 /*      EN50221 tag     */
 500                 command = 0;
 501
 502                 for (i = 0; i < 3; i++) {
 503                         command = command | p_ca_message->msg[i];
 504                         if (i < 2)
 505                                 command = command << 8;
 506                 }
 507                 dprintk(verbose, DST_CA_DEBUG, 1, " Command=[0x%x]\n", command);
 508
 509                 switch (command) {
 510                 case CA_PMT:
 511                         dprintk(verbose, DST_CA_DEBUG, 1, "Command = SEND_CA_PMT");
 512                         if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, 0)) < 0) {   // code simplification started
 513                                 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT Failed !");
 514                                 result = -1;
 515                                 goto free_mem_and_exit;
 516                         }
 517                         dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT Success !");
 518                         break;
 519                 case CA_PMT_REPLY:
 520                         dprintk(verbose, DST_CA_INFO, 1, "Command = CA_PMT_REPLY");
 521                         /*      Have to handle the 2 basic types of cards here  */
 522                         if ((dst_check_ca_pmt(state, p_ca_message, hw_buffer)) < 0) {
 523                                 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT_REPLY Failed !");
 524                                 result = -1;
 525                                 goto free_mem_and_exit;
 526                         }
 527                         dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT_REPLY Success !");
 528                         break;
 529                 case CA_APP_INFO_ENQUIRY:               // only for debugging
 530                         dprintk(verbose, DST_CA_INFO, 1, " Getting Cam Application information");
 531
 532                         if ((ca_get_app_info(state)) < 0) {
 533                                 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_APP_INFO_ENQUIRY Failed !");
 534                                 result = -1;
 535                                 goto free_mem_and_exit;
 536                         }
 537                         dprintk(verbose, DST_CA_INFO, 1, " -->CA_APP_INFO_ENQUIRY Success !");
 538                         break;
 539                 case CA_INFO_ENQUIRY:
 540                         dprintk(verbose, DST_CA_INFO, 1, " Getting CA Information");
 541
 542                         if ((ca_get_ca_info(state)) < 0) {
 543                                 dprintk(verbose, DST_CA_ERROR, 1, " -->CA_INFO_ENQUIRY Failed !");
 544                                 result = -1;
 545                                 goto free_mem_and_exit;
 546                         }
 547                         dprintk(verbose, DST_CA_INFO, 1, " -->CA_INFO_ENQUIRY Success !");
 548                         break;
 549                 }
 550         }
 551 free_mem_and_exit:
 552         kfree (hw_buffer);
 553
 554         return result;
 555 }
 556
 557 static long dst_ca_ioctl(struct file *file, unsigned int cmd, unsigned long ioctl_arg)
 558 {
 559         struct dvb_device *dvbdev;
 560         struct dst_state *state;
 561         struct ca_slot_info *p_ca_slot_info;
 562         struct ca_caps *p_ca_caps;
 563         struct ca_msg *p_ca_message;
 564         void __user *arg = (void __user *)ioctl_arg;
 565         int result = 0;
 566
 567         lock_kernel();
 568         dvbdev = file->private_data;
 569         state = (struct dst_state *)dvbdev->priv;
 570         p_ca_message = kmalloc(sizeof (struct ca_msg), GFP_KERNEL);
 571         p_ca_slot_info = kmalloc(sizeof (struct ca_slot_info), GFP_KERNEL);
 572         p_ca_caps = kmalloc(sizeof (struct ca_caps), GFP_KERNEL);
 573         if (!p_ca_message || !p_ca_slot_info || !p_ca_caps) {
 574                 dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
 575                 result = -ENOMEM;
 576                 goto free_mem_and_exit;
 577         }
 578
 579         /*      We have now only the standard ioctl's, the driver is upposed to handle internals.       */
 580         switch (cmd) {
 581         case CA_SEND_MSG:
 582                 dprintk(verbose, DST_CA_INFO, 1, " Sending message");
 583                 if ((ca_send_message(state, p_ca_message, arg)) < 0) {
 584                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SEND_MSG Failed !");
 585                         result = -1;
 586                         goto free_mem_and_exit;
 587                 }
 588                 break;
 589         case CA_GET_MSG:
 590                 dprintk(verbose, DST_CA_INFO, 1, " Getting message");
 591                 if ((ca_get_message(state, p_ca_message, arg)) < 0) {
 592                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_MSG Failed !");
 593                         result = -1;
 594                         goto free_mem_and_exit;
 595                 }
 596                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_MSG Success !");
 597                 break;
 598         case CA_RESET:
 599                 dprintk(verbose, DST_CA_ERROR, 1, " Resetting DST");
 600                 dst_error_bailout(state);
 601                 msleep(4000);
 602                 break;
 603         case CA_GET_SLOT_INFO:
 604                 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot info");
 605                 if ((ca_get_slot_info(state, p_ca_slot_info, arg)) < 0) {
 606                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_SLOT_INFO Failed !");
 607                         result = -1;
 608                         goto free_mem_and_exit;
 609                 }
 610                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_SLOT_INFO Success !");
 611                 break;
 612         case CA_GET_CAP:
 613                 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot capabilities");
 614                 if ((ca_get_slot_caps(state, p_ca_caps, arg)) < 0) {
 615                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_CAP Failed !");
 616                         result = -1;
 617                         goto free_mem_and_exit;
 618                 }
 619                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_CAP Success !");
 620                 break;
 621         case CA_GET_DESCR_INFO:
 622                 dprintk(verbose, DST_CA_INFO, 1, " Getting descrambler description");
 623                 if ((ca_get_slot_descr(state, p_ca_message, arg)) < 0) {
 624                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_DESCR_INFO Failed !");
 625                         result = -1;
 626                         goto free_mem_and_exit;
 627                 }
 628                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_DESCR_INFO Success !");
 629                 break;
 630         case CA_SET_DESCR:
 631                 dprintk(verbose, DST_CA_INFO, 1, " Setting descrambler");
 632                 if ((ca_set_slot_descr()) < 0) {
 633                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_DESCR Failed !");
 634                         result = -1;
 635                         goto free_mem_and_exit;
 636                 }
 637                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_DESCR Success !");
 638                 break;
 639         case CA_SET_PID:
 640                 dprintk(verbose, DST_CA_INFO, 1, " Setting PID");
 641                 if ((ca_set_pid()) < 0) {
 642                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_PID Failed !");
 643                         result = -1;
 644                         goto free_mem_and_exit;
 645                 }
 646                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_PID Success !");
 647         default:
 648                 result = -EOPNOTSUPP;
 649         };
 650  free_mem_and_exit:
 651         kfree (p_ca_message);
 652         kfree (p_ca_slot_info);
 653         kfree (p_ca_caps);
 654
 655         unlock_kernel();
 656         return result;
 657 }
 658
 659 static int dst_ca_open(struct inode *inode, struct file *file)
 660 {
 661         dprintk(verbose, DST_CA_DEBUG, 1, " Device opened [%p] ", file);
 662         try_module_get(THIS_MODULE);
 663
 664         return 0;
 665 }
 666
 667 static int dst_ca_release(struct inode *inode, struct file *file)
 668 {
 669         dprintk(verbose, DST_CA_DEBUG, 1, " Device closed.");
 670         module_put(THIS_MODULE);
 671
 672         return 0;
 673 }
 674
 675 static ssize_t dst_ca_read(struct file *file, char __user *buffer, size_t length, loff_t *offset)
 676 {
 677         ssize_t bytes_read = 0;
 678
 679         dprintk(verbose, DST_CA_DEBUG, 1, " Device read.");
 680
 681         return bytes_read;
 682 }
 683
 684 static ssize_t dst_ca_write(struct file *file, const char __user *buffer, size_t length, loff_t *offset)
 685 {
 686         dprintk(verbose, DST_CA_DEBUG, 1, " Device write.");
 687
 688         return 0;
 689 }
 690
 691 static const struct file_operations dst_ca_fops = {
 692         .owner = THIS_MODULE,
 693         .unlocked_ioctl = dst_ca_ioctl,
 694         .open = dst_ca_open,
 695         .release = dst_ca_release,
 696         .read = dst_ca_read,
 697         .write = dst_ca_write,
 698         .llseek = noop_llseek,
 699 };
 700
 701 static struct dvb_device dvbdev_ca = {
 702         .priv = NULL,
 703         .users = 1,
 704         .readers = 1,
 705         .writers = 1,
 706         .fops = &dst_ca_fops
 707 };
 708
 709 struct dvb_device *dst_ca_attach(struct dst_state *dst, struct dvb_adapter *dvb_adapter)
 710 {
 711         struct dvb_device *dvbdev;
 712
 713         dprintk(verbose, DST_CA_ERROR, 1, "registering DST-CA device");
 714         if (dvb_register_device(dvb_adapter, &dvbdev, &dvbdev_ca, dst, DVB_DEVICE_CA) == 0) {
 715                 dst->dst_ca = dvbdev;
 716                 return dst->dst_ca;
 717         }
 718
 719         return NULL;
 720 }
 721
 722 EXPORT_SYMBOL(dst_ca_attach);
 723
 724 MODULE_DESCRIPTION("DST DVB-S/T/C Combo CA driver");
 725 MODULE_AUTHOR("Manu Abraham");
 726 MODULE_LICENSE("GPL");