drivers/media/pci/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/mutex.h>
  26 #include <linux/string.h>
  27 #include <linux/dvb/ca.h>
  28 #include <media/dvbdev.h>
  29 #include <media/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 DEFINE_MUTEX(dst_ca_mutex);
  56 static unsigned int verbose = 5;
  57 module_param(verbose, int, 0644);
  58 MODULE_PARM_DESC(verbose, "verbose startup messages, default is 1 (yes)");
  59
  60 static void put_command_and_length(u8 *data, int command, int length)
  61 {
  62         data[0] = (command >> 16) & 0xff;
  63         data[1] = (command >> 8) & 0xff;
  64         data[2] = command & 0xff;
  65         data[3] = length;
  66 }
  67
  68 static void put_checksum(u8 *check_string, int length)
  69 {
  70         dprintk(verbose, DST_CA_DEBUG, 1, " Computing string checksum.");
  71         dprintk(verbose, DST_CA_DEBUG, 1, "  -> string length : 0x%02x", length);
  72         check_string[length] = dst_check_sum (check_string, length);
  73         dprintk(verbose, DST_CA_DEBUG, 1, "  -> checksum      : 0x%02x", check_string[length]);
  74 }
  75
  76 static int dst_ci_command(struct dst_state* state, u8 * data, u8 *ca_string, u8 len, int read)
  77 {
  78         u8 reply;
  79
  80         mutex_lock(&state->dst_mutex);
  81         dst_comm_init(state);
  82         msleep(65);
  83
  84         if (write_dst(state, data, len)) {
  85                 dprintk(verbose, DST_CA_INFO, 1, " Write not successful, trying to recover");
  86                 dst_error_recovery(state);
  87                 goto error;
  88         }
  89         if ((dst_pio_disable(state)) < 0) {
  90                 dprintk(verbose, DST_CA_ERROR, 1, " DST PIO disable failed.");
  91                 goto error;
  92         }
  93         if (read_dst(state, &reply, GET_ACK) < 0) {
  94                 dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
  95                 dst_error_recovery(state);
  96                 goto error;
  97         }
  98         if (read) {
  99                 if (! dst_wait_dst_ready(state, LONG_DELAY)) {
 100                         dprintk(verbose, DST_CA_NOTICE, 1, " 8820 not ready");
 101                         goto error;
 102                 }
 103                 if (read_dst(state, ca_string, 128) < 0) {      /*      Try to make this dynamic        */
 104                         dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
 105                         dst_error_recovery(state);
 106                         goto error;
 107                 }
 108         }
 109         mutex_unlock(&state->dst_mutex);
 110         return 0;
 111
 112 error:
 113         mutex_unlock(&state->dst_mutex);
 114         return -EIO;
 115 }
 116
 117
 118 static int dst_put_ci(struct dst_state *state, u8 *data, int len, u8 *ca_string, int read)
 119 {
 120         u8 dst_ca_comm_err = 0;
 121
 122         while (dst_ca_comm_err < RETRIES) {
 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.
 127                 } else {
 128                         break;
 129                 }
 130         }
 131
 132         if(dst_ca_comm_err == RETRIES)
 133                 return -EIO;
 134
 135         return 0;
 136 }
 137
 138
 139
 140 static int ca_get_app_info(struct dst_state *state)
 141 {
 142         int length, str_length;
 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 -EIO;
 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], __func__, (char *)(&state->messages[12]));
 155         dprintk(verbose, DST_CA_INFO, 1, " ==================================================================================================");
 156
 157         // Transform dst message to correct application_info message
 158         length = state->messages[5];
 159         str_length = length - 6;
 160         if (str_length < 0) {
 161                 str_length = 0;
 162                 dprintk(verbose, DST_CA_ERROR, 1, "Invalid string length returned in ca_get_app_info(). Recovering.");
 163         }
 164
 165         // First, the command and length fields
 166         put_command_and_length(&state->messages[0], CA_APP_INFO, length);
 167
 168         // Copy application_type, application_manufacturer and manufacturer_code
 169         memmove(&state->messages[4], &state->messages[7], 5);
 170
 171         // Set string length and copy string
 172         state->messages[9] = str_length;
 173         memmove(&state->messages[10], &state->messages[12], str_length);
 174
 175         return 0;
 176 }
 177
 178 static int ca_get_ca_info(struct dst_state *state)
 179 {
 180         int srcPtr, dstPtr, i, num_ids;
 181         static u8 slot_command[8] = {0x07, 0x40, 0x00, 0x00, 0x02, 0x00, 0x00, 0xff};
 182         const int in_system_id_pos = 8, out_system_id_pos = 4, in_num_ids_pos = 7;
 183
 184         put_checksum(&slot_command[0], slot_command[0]);
 185         if ((dst_put_ci(state, slot_command, sizeof (slot_command), state->messages, GET_REPLY)) < 0) {
 186                 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
 187                 return -EIO;
 188         }
 189         dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
 190
 191         // Print raw data
 192         dprintk(verbose, DST_CA_INFO, 0, " DST data = [");
 193         for (i = 0; i < state->messages[0] + 1; i++) {
 194                 dprintk(verbose, DST_CA_INFO, 0, " 0x%02x", state->messages[i]);
 195         }
 196         dprintk(verbose, DST_CA_INFO, 0, "]\n");
 197
 198         // Set the command and length of the output
 199         num_ids = state->messages[in_num_ids_pos];
 200         if (num_ids >= 100) {
 201                 num_ids = 100;
 202                 dprintk(verbose, DST_CA_ERROR, 1, "Invalid number of ids (>100). Recovering.");
 203         }
 204         put_command_and_length(&state->messages[0], CA_INFO, num_ids * 2);
 205
 206         dprintk(verbose, DST_CA_INFO, 0, " CA_INFO = [");
 207         srcPtr = in_system_id_pos;
 208         dstPtr = out_system_id_pos;
 209         for(i = 0; i < num_ids; i++) {
 210                 dprintk(verbose, DST_CA_INFO, 0, " 0x%02x%02x", state->messages[srcPtr + 0], state->messages[srcPtr + 1]);
 211                 // Append to output
 212                 state->messages[dstPtr + 0] = state->messages[srcPtr + 0];
 213                 state->messages[dstPtr + 1] = state->messages[srcPtr + 1];
 214                 srcPtr += 2;
 215                 dstPtr += 2;
 216         }
 217         dprintk(verbose, DST_CA_INFO, 0, "]\n");
 218
 219         return 0;
 220 }
 221
 222 static int ca_get_slot_caps(struct dst_state *state, struct ca_caps *p_ca_caps, void __user *arg)
 223 {
 224         int i;
 225         u8 slot_cap[256];
 226         static u8 slot_command[8] = {0x07, 0x40, 0x02, 0x00, 0x02, 0x00, 0x00, 0xff};
 227
 228         put_checksum(&slot_command[0], slot_command[0]);
 229         if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_cap, GET_REPLY)) < 0) {
 230                 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
 231                 return -EIO;
 232         }
 233         dprintk(verbose, DST_CA_NOTICE, 1, " -->dst_put_ci SUCCESS !");
 234
 235         /*      Will implement the rest soon            */
 236
 237         dprintk(verbose, DST_CA_INFO, 1, " Slot cap = [%d]", slot_cap[7]);
 238         dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
 239         for (i = 0; i < slot_cap[0] + 1; i++)
 240                 dprintk(verbose, DST_CA_INFO, 0, " %d", slot_cap[i]);
 241         dprintk(verbose, DST_CA_INFO, 0, "\n");
 242
 243         p_ca_caps->slot_num = 1;
 244         p_ca_caps->slot_type = 1;
 245         p_ca_caps->descr_num = slot_cap[7];
 246         p_ca_caps->descr_type = 1;
 247
 248         if (copy_to_user(arg, p_ca_caps, sizeof (struct ca_caps)))
 249                 return -EFAULT;
 250
 251         return 0;
 252 }
 253
 254 /*      Need some more work     */
 255 static int ca_get_slot_descr(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
 256 {
 257         return -EOPNOTSUPP;
 258 }
 259
 260
 261 static int ca_get_slot_info(struct dst_state *state, struct ca_slot_info *p_ca_slot_info, void __user *arg)
 262 {
 263         int i;
 264         static u8 slot_command[8] = {0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff};
 265
 266         u8 *slot_info = state->messages;
 267
 268         put_checksum(&slot_command[0], 7);
 269         if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_info, GET_REPLY)) < 0) {
 270                 dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
 271                 return -EIO;
 272         }
 273         dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
 274
 275         /*      Will implement the rest soon            */
 276
 277         dprintk(verbose, DST_CA_INFO, 1, " Slot info = [%d]", slot_info[3]);
 278         dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
 279         for (i = 0; i < 8; i++)
 280                 dprintk(verbose, DST_CA_INFO, 0, " %d", slot_info[i]);
 281         dprintk(verbose, DST_CA_INFO, 0, "\n");
 282
 283         if (slot_info[4] & 0x80) {
 284                 p_ca_slot_info->flags = CA_CI_MODULE_PRESENT;
 285                 p_ca_slot_info->num = 1;
 286                 p_ca_slot_info->type = CA_CI;
 287         } else if (slot_info[4] & 0x40) {
 288                 p_ca_slot_info->flags = CA_CI_MODULE_READY;
 289                 p_ca_slot_info->num = 1;
 290                 p_ca_slot_info->type = CA_CI;
 291         } else
 292                 p_ca_slot_info->flags = 0;
 293
 294         if (copy_to_user(arg, p_ca_slot_info, sizeof (struct ca_slot_info)))
 295                 return -EFAULT;
 296
 297         return 0;
 298 }
 299
 300
 301 static int ca_get_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
 302 {
 303         u8 i = 0;
 304         u32 command = 0;
 305
 306         if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg)))
 307                 return -EFAULT;
 308
 309         dprintk(verbose, DST_CA_NOTICE, 1, " Message = [%*ph]",
 310                 3, p_ca_message->msg);
 311
 312         for (i = 0; i < 3; i++) {
 313                 command = command | p_ca_message->msg[i];
 314                 if (i < 2)
 315                         command = command << 8;
 316         }
 317         dprintk(verbose, DST_CA_NOTICE, 1, " Command=[0x%x]", command);
 318
 319         switch (command) {
 320         case CA_APP_INFO:
 321                 memcpy(p_ca_message->msg, state->messages, 128);
 322                 if (copy_to_user(arg, p_ca_message, sizeof (struct ca_msg)) )
 323                         return -EFAULT;
 324                 break;
 325         case CA_INFO:
 326                 memcpy(p_ca_message->msg, state->messages, 128);
 327                 if (copy_to_user(arg, p_ca_message, sizeof (struct ca_msg)) )
 328                         return -EFAULT;
 329                 break;
 330         }
 331
 332         return 0;
 333 }
 334
 335 static int handle_dst_tag(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u32 length)
 336 {
 337         if (state->dst_hw_cap & DST_TYPE_HAS_SESSION) {
 338                 hw_buffer->msg[2] = p_ca_message->msg[1];       /*      MSB     */
 339                 hw_buffer->msg[3] = p_ca_message->msg[2];       /*      LSB     */
 340         } else {
 341                 if (length > 247) {
 342                         dprintk(verbose, DST_CA_ERROR, 1, " Message too long ! *** Bailing Out *** !");
 343                         return -EIO;
 344                 }
 345                 hw_buffer->msg[0] = (length & 0xff) + 7;
 346                 hw_buffer->msg[1] = 0x40;
 347                 hw_buffer->msg[2] = 0x03;
 348                 hw_buffer->msg[3] = 0x00;
 349                 hw_buffer->msg[4] = 0x03;
 350                 hw_buffer->msg[5] = length & 0xff;
 351                 hw_buffer->msg[6] = 0x00;
 352
 353                 /*
 354                  *      Need to compute length for EN50221 section 8.3.2, for the time being
 355                  *      assuming 8.3.2 is not applicable
 356                  */
 357                 memcpy(&hw_buffer->msg[7], &p_ca_message->msg[4], length);
 358         }
 359
 360         return 0;
 361 }
 362
 363 static int write_to_8820(struct dst_state *state, struct ca_msg *hw_buffer, u8 length, u8 reply)
 364 {
 365         if ((dst_put_ci(state, hw_buffer->msg, length, hw_buffer->msg, reply)) < 0) {
 366                 dprintk(verbose, DST_CA_ERROR, 1, " DST-CI Command failed.");
 367                 dprintk(verbose, DST_CA_NOTICE, 1, " Resetting DST.");
 368                 rdc_reset_state(state);
 369                 return -EIO;
 370         }
 371         dprintk(verbose, DST_CA_NOTICE, 1, " DST-CI Command success.");
 372
 373         return 0;
 374 }
 375
 376 static u32 asn_1_decode(u8 *asn_1_array)
 377 {
 378         u8 length_field = 0, word_count = 0, count = 0;
 379         u32 length = 0;
 380
 381         length_field = asn_1_array[0];
 382         dprintk(verbose, DST_CA_DEBUG, 1, " Length field=[%02x]", length_field);
 383         if (length_field < 0x80) {
 384                 length = length_field & 0x7f;
 385                 dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%02x]\n", length);
 386         } else {
 387                 word_count = length_field & 0x7f;
 388                 for (count = 0; count < word_count; count++) {
 389                         length = length  << 8;
 390                         length += asn_1_array[count + 1];
 391                         dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%04x]", length);
 392                 }
 393         }
 394         return length;
 395 }
 396
 397 static int debug_string(u8 *msg, u32 length, u32 offset)
 398 {
 399         u32 i;
 400
 401         dprintk(verbose, DST_CA_DEBUG, 0, " String=[ ");
 402         for (i = offset; i < length; i++)
 403                 dprintk(verbose, DST_CA_DEBUG, 0, "%02x ", msg[i]);
 404         dprintk(verbose, DST_CA_DEBUG, 0, "]\n");
 405
 406         return 0;
 407 }
 408
 409
 410 static int ca_set_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u8 reply, u8 query)
 411 {
 412         u32 length = 0;
 413         u8 tag_length = 8;
 414
 415         length = asn_1_decode(&p_ca_message->msg[3]);
 416         dprintk(verbose, DST_CA_DEBUG, 1, " CA Message length=[%d]", length);
 417         debug_string(&p_ca_message->msg[4], length, 0); /*      length is excluding tag & length        */
 418
 419         memset(hw_buffer->msg, '\0', length);
 420         handle_dst_tag(state, p_ca_message, hw_buffer, length);
 421         put_checksum(hw_buffer->msg, hw_buffer->msg[0]);
 422
 423         debug_string(hw_buffer->msg, (length + tag_length), 0); /*      tags too        */
 424         write_to_8820(state, hw_buffer, (length + tag_length), reply);
 425
 426         return 0;
 427 }
 428
 429
 430 /*      Board supports CA PMT reply ?           */
 431 static int dst_check_ca_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer)
 432 {
 433         int ca_pmt_reply_test = 0;
 434
 435         /*      Do test board                   */
 436         /*      Not there yet but soon          */
 437
 438         /*      CA PMT Reply capable            */
 439         if (ca_pmt_reply_test) {
 440                 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 1, GET_REPLY)) < 0) {
 441                         dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
 442                         return -EIO;
 443                 }
 444
 445         /*      Process CA PMT Reply            */
 446         /*      will implement soon             */
 447                 dprintk(verbose, DST_CA_ERROR, 1, " Not there yet");
 448         }
 449         /*      CA PMT Reply not capable        */
 450         if (!ca_pmt_reply_test) {
 451                 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, NO_REPLY)) < 0) {
 452                         dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
 453                         return -EIO;
 454                 }
 455                 dprintk(verbose, DST_CA_NOTICE, 1, " ca_set_pmt.. success !");
 456         /*      put a dummy message             */
 457
 458         }
 459         return 0;
 460 }
 461
 462 static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
 463 {
 464         int i;
 465         u32 command;
 466         struct ca_msg *hw_buffer;
 467         int result = 0;
 468
 469         hw_buffer = kmalloc(sizeof(*hw_buffer), GFP_KERNEL);
 470         if (!hw_buffer)
 471                 return -ENOMEM;
 472         dprintk(verbose, DST_CA_DEBUG, 1, " ");
 473
 474         if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg))) {
 475                 result = -EFAULT;
 476                 goto free_mem_and_exit;
 477         }
 478
 479         /*      EN50221 tag     */
 480         command = 0;
 481
 482         for (i = 0; i < 3; i++) {
 483                 command = command | p_ca_message->msg[i];
 484                 if (i < 2)
 485                         command = command << 8;
 486         }
 487         dprintk(verbose, DST_CA_DEBUG, 1, " Command=[0x%x]\n", command);
 488
 489         switch (command) {
 490         case CA_PMT:
 491                 dprintk(verbose, DST_CA_DEBUG, 1, "Command = SEND_CA_PMT");
 492                 if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, 0)) < 0) {   // code simplification started
 493                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT Failed !");
 494                         result = -1;
 495                         goto free_mem_and_exit;
 496                 }
 497                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT Success !");
 498                 break;
 499         case CA_PMT_REPLY:
 500                 dprintk(verbose, DST_CA_INFO, 1, "Command = CA_PMT_REPLY");
 501                 /*      Have to handle the 2 basic types of cards here  */
 502                 if ((dst_check_ca_pmt(state, p_ca_message, hw_buffer)) < 0) {
 503                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT_REPLY Failed !");
 504                         result = -1;
 505                         goto free_mem_and_exit;
 506                 }
 507                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT_REPLY Success !");
 508                 break;
 509         case CA_APP_INFO_ENQUIRY:               // only for debugging
 510                 dprintk(verbose, DST_CA_INFO, 1, " Getting Cam Application information");
 511
 512                 if ((ca_get_app_info(state)) < 0) {
 513                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_APP_INFO_ENQUIRY Failed !");
 514                         result = -1;
 515                         goto free_mem_and_exit;
 516                 }
 517                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_APP_INFO_ENQUIRY Success !");
 518                 break;
 519         case CA_INFO_ENQUIRY:
 520                 dprintk(verbose, DST_CA_INFO, 1, " Getting CA Information");
 521
 522                 if ((ca_get_ca_info(state)) < 0) {
 523                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_INFO_ENQUIRY Failed !");
 524                         result = -1;
 525                         goto free_mem_and_exit;
 526                 }
 527                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_INFO_ENQUIRY Success !");
 528                 break;
 529         }
 530
 531 free_mem_and_exit:
 532         kfree (hw_buffer);
 533
 534         return result;
 535 }
 536
 537 static long dst_ca_ioctl(struct file *file, unsigned int cmd, unsigned long ioctl_arg)
 538 {
 539         struct dvb_device *dvbdev;
 540         struct dst_state *state;
 541         struct ca_slot_info *p_ca_slot_info;
 542         struct ca_caps *p_ca_caps;
 543         struct ca_msg *p_ca_message;
 544         void __user *arg = (void __user *)ioctl_arg;
 545         int result = 0;
 546
 547         mutex_lock(&dst_ca_mutex);
 548         dvbdev = file->private_data;
 549         state = (struct dst_state *)dvbdev->priv;
 550         p_ca_message = kmalloc(sizeof (struct ca_msg), GFP_KERNEL);
 551         p_ca_slot_info = kmalloc(sizeof (struct ca_slot_info), GFP_KERNEL);
 552         p_ca_caps = kmalloc(sizeof (struct ca_caps), GFP_KERNEL);
 553         if (!p_ca_message || !p_ca_slot_info || !p_ca_caps) {
 554                 result = -ENOMEM;
 555                 goto free_mem_and_exit;
 556         }
 557
 558         /*      We have now only the standard ioctl's, the driver is upposed to handle internals.       */
 559         switch (cmd) {
 560         case CA_SEND_MSG:
 561                 dprintk(verbose, DST_CA_INFO, 1, " Sending message");
 562                 result = ca_send_message(state, p_ca_message, arg);
 563
 564                 if (result < 0) {
 565                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SEND_MSG Failed !");
 566                         goto free_mem_and_exit;
 567                 }
 568                 break;
 569         case CA_GET_MSG:
 570                 dprintk(verbose, DST_CA_INFO, 1, " Getting message");
 571                 result = ca_get_message(state, p_ca_message, arg);
 572                 if (result < 0) {
 573                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_MSG Failed !");
 574                         goto free_mem_and_exit;
 575                 }
 576                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_MSG Success !");
 577                 break;
 578         case CA_RESET:
 579                 dprintk(verbose, DST_CA_ERROR, 1, " Resetting DST");
 580                 dst_error_bailout(state);
 581                 msleep(4000);
 582                 break;
 583         case CA_GET_SLOT_INFO:
 584                 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot info");
 585                 result = ca_get_slot_info(state, p_ca_slot_info, arg);
 586                 if (result < 0) {
 587                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_SLOT_INFO Failed !");
 588                         result = -1;
 589                         goto free_mem_and_exit;
 590                 }
 591                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_SLOT_INFO Success !");
 592                 break;
 593         case CA_GET_CAP:
 594                 dprintk(verbose, DST_CA_INFO, 1, " Getting Slot capabilities");
 595                 result = ca_get_slot_caps(state, p_ca_caps, arg);
 596                 if (result < 0) {
 597                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_CAP Failed !");
 598                         goto free_mem_and_exit;
 599                 }
 600                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_CAP Success !");
 601                 break;
 602         case CA_GET_DESCR_INFO:
 603                 dprintk(verbose, DST_CA_INFO, 1, " Getting descrambler description");
 604                 result = ca_get_slot_descr(state, p_ca_message, arg);
 605                 if (result < 0) {
 606                         dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_DESCR_INFO Failed !");
 607                         goto free_mem_and_exit;
 608                 }
 609                 dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_DESCR_INFO Success !");
 610                 break;
 611         default:
 612                 result = -EOPNOTSUPP;
 613         }
 614  free_mem_and_exit:
 615         kfree (p_ca_message);
 616         kfree (p_ca_slot_info);
 617         kfree (p_ca_caps);
 618
 619         mutex_unlock(&dst_ca_mutex);
 620         return result;
 621 }
 622
 623 static int dst_ca_open(struct inode *inode, struct file *file)
 624 {
 625         dprintk(verbose, DST_CA_DEBUG, 1, " Device opened [%p] ", file);
 626
 627         return 0;
 628 }
 629
 630 static int dst_ca_release(struct inode *inode, struct file *file)
 631 {
 632         dprintk(verbose, DST_CA_DEBUG, 1, " Device closed.");
 633
 634         return 0;
 635 }
 636
 637 static ssize_t dst_ca_read(struct file *file, char __user *buffer, size_t length, loff_t *offset)
 638 {
 639         dprintk(verbose, DST_CA_DEBUG, 1, " Device read.");
 640
 641         return 0;
 642 }
 643
 644 static ssize_t dst_ca_write(struct file *file, const char __user *buffer, size_t length, loff_t *offset)
 645 {
 646         dprintk(verbose, DST_CA_DEBUG, 1, " Device write.");
 647
 648         return 0;
 649 }
 650
 651 static const struct file_operations dst_ca_fops = {
 652         .owner = THIS_MODULE,
 653         .unlocked_ioctl = dst_ca_ioctl,
 654         .open = dst_ca_open,
 655         .release = dst_ca_release,
 656         .read = dst_ca_read,
 657         .write = dst_ca_write,
 658         .llseek = noop_llseek,
 659 };
 660
 661 static struct dvb_device dvbdev_ca = {
 662         .priv = NULL,
 663         .users = 1,
 664         .readers = 1,
 665         .writers = 1,
 666         .fops = &dst_ca_fops
 667 };
 668
 669 struct dvb_device *dst_ca_attach(struct dst_state *dst, struct dvb_adapter *dvb_adapter)
 670 {
 671         struct dvb_device *dvbdev;
 672
 673         dprintk(verbose, DST_CA_ERROR, 1, "registering DST-CA device");
 674         if (dvb_register_device(dvb_adapter, &dvbdev, &dvbdev_ca, dst,
 675                                 DVB_DEVICE_CA, 0) == 0) {
 676                 dst->dst_ca = dvbdev;
 677                 return dst->dst_ca;
 678         }
 679
 680         return NULL;
 681 }
 682
 683 EXPORT_SYMBOL(dst_ca_attach);
 684
 685 MODULE_DESCRIPTION("DST DVB-S/T/C Combo CA driver");
 686 MODULE_AUTHOR("Manu Abraham");
 687 MODULE_LICENSE("GPL");