drivers/media/dvb-frontends/stv0900_sw.c

   1 /*
   2  * stv0900_sw.c
   3  *
   4  * Driver for ST STV0900 satellite demodulator IC.
   5  *
   6  * Copyright (C) ST Microelectronics.
   7  * Copyright (C) 2009 NetUP Inc.
   8  * Copyright (C) 2009 Igor M. Liplianin <[email protected]>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #include "stv0900.h"
  27 #include "stv0900_reg.h"
  28 #include "stv0900_priv.h"
  29
  30 s32 shiftx(s32 x, int demod, s32 shift)
  31 {
  32         if (demod == 1)
  33                 return x - shift;
  34
  35         return x;
  36 }
  37
  38 int stv0900_check_signal_presence(struct stv0900_internal *intp,
  39                                         enum fe_stv0900_demod_num demod)
  40 {
  41         s32     carr_offset,
  42                 agc2_integr,
  43                 max_carrier;
  44
  45         int no_signal = FALSE;
  46
  47         carr_offset = (stv0900_read_reg(intp, CFR2) << 8)
  48                                         | stv0900_read_reg(intp, CFR1);
  49         carr_offset = ge2comp(carr_offset, 16);
  50         agc2_integr = (stv0900_read_reg(intp, AGC2I1) << 8)
  51                                         | stv0900_read_reg(intp, AGC2I0);
  52         max_carrier = intp->srch_range[demod] / 1000;
  53
  54         max_carrier += (max_carrier / 10);
  55         max_carrier = 65536 * (max_carrier / 2);
  56         max_carrier /= intp->mclk / 1000;
  57         if (max_carrier > 0x4000)
  58                 max_carrier = 0x4000;
  59
  60         if ((agc2_integr > 0x2000)
  61                         || (carr_offset > (2 * max_carrier))
  62                         || (carr_offset < (-2 * max_carrier)))
  63                 no_signal = TRUE;
  64
  65         return no_signal;
  66 }
  67
  68 static void stv0900_get_sw_loop_params(struct stv0900_internal *intp,
  69                                 s32 *frequency_inc, s32 *sw_timeout,
  70                                 s32 *steps,
  71                                 enum fe_stv0900_demod_num demod)
  72 {
  73         s32 timeout, freq_inc, max_steps, srate, max_carrier;
  74
  75         enum fe_stv0900_search_standard standard;
  76
  77         srate = intp->symbol_rate[demod];
  78         max_carrier = intp->srch_range[demod] / 1000;
  79         max_carrier += max_carrier / 10;
  80         standard = intp->srch_standard[demod];
  81
  82         max_carrier = 65536 * (max_carrier / 2);
  83         max_carrier /= intp->mclk / 1000;
  84
  85         if (max_carrier > 0x4000)
  86                 max_carrier = 0x4000;
  87
  88         freq_inc = srate;
  89         freq_inc /= intp->mclk >> 10;
  90         freq_inc = freq_inc << 6;
  91
  92         switch (standard) {
  93         case STV0900_SEARCH_DVBS1:
  94         case STV0900_SEARCH_DSS:
  95                 freq_inc *= 3;
  96                 timeout = 20;
  97                 break;
  98         case STV0900_SEARCH_DVBS2:
  99                 freq_inc *= 4;
 100                 timeout = 25;
 101                 break;
 102         case STV0900_AUTO_SEARCH:
 103         default:
 104                 freq_inc *= 3;
 105                 timeout = 25;
 106                 break;
 107         }
 108
 109         freq_inc /= 100;
 110
 111         if ((freq_inc > max_carrier) || (freq_inc < 0))
 112                 freq_inc = max_carrier / 2;
 113
 114         timeout *= 27500;
 115
 116         if (srate > 0)
 117                 timeout /= srate / 1000;
 118
 119         if ((timeout > 100) || (timeout < 0))
 120                 timeout = 100;
 121
 122         max_steps = (max_carrier / freq_inc) + 1;
 123
 124         if ((max_steps > 100) || (max_steps < 0)) {
 125                 max_steps =  100;
 126                 freq_inc = max_carrier / max_steps;
 127         }
 128
 129         *frequency_inc = freq_inc;
 130         *sw_timeout = timeout;
 131         *steps = max_steps;
 132
 133 }
 134
 135 static int stv0900_search_carr_sw_loop(struct stv0900_internal *intp,
 136                                 s32 FreqIncr, s32 Timeout, int zigzag,
 137                                 s32 MaxStep, enum fe_stv0900_demod_num demod)
 138 {
 139         int     no_signal,
 140                 lock = FALSE;
 141         s32     stepCpt,
 142                 freqOffset,
 143                 max_carrier;
 144
 145         max_carrier = intp->srch_range[demod] / 1000;
 146         max_carrier += (max_carrier / 10);
 147
 148         max_carrier = 65536 * (max_carrier / 2);
 149         max_carrier /= intp->mclk / 1000;
 150
 151         if (max_carrier > 0x4000)
 152                 max_carrier = 0x4000;
 153
 154         if (zigzag == TRUE)
 155                 freqOffset = 0;
 156         else
 157                 freqOffset = -max_carrier + FreqIncr;
 158
 159         stepCpt = 0;
 160
 161         do {
 162                 stv0900_write_reg(intp, DMDISTATE, 0x1c);
 163                 stv0900_write_reg(intp, CFRINIT1, (freqOffset / 256) & 0xff);
 164                 stv0900_write_reg(intp, CFRINIT0, freqOffset & 0xff);
 165                 stv0900_write_reg(intp, DMDISTATE, 0x18);
 166                 stv0900_write_bits(intp, ALGOSWRST, 1);
 167
 168                 if (intp->chip_id == 0x12) {
 169                         stv0900_write_bits(intp, RST_HWARE, 1);
 170                         stv0900_write_bits(intp, RST_HWARE, 0);
 171                 }
 172
 173                 if (zigzag == TRUE) {
 174                         if (freqOffset >= 0)
 175                                 freqOffset = -freqOffset - 2 * FreqIncr;
 176                         else
 177                                 freqOffset = -freqOffset;
 178                 } else
 179                         freqOffset += + 2 * FreqIncr;
 180
 181                 stepCpt++;
 182                 lock = stv0900_get_demod_lock(intp, demod, Timeout);
 183                 no_signal = stv0900_check_signal_presence(intp, demod);
 184
 185         } while ((lock == FALSE)
 186                         && (no_signal == FALSE)
 187                         && ((freqOffset - FreqIncr) <  max_carrier)
 188                         && ((freqOffset + FreqIncr) > -max_carrier)
 189                         && (stepCpt < MaxStep));
 190
 191         stv0900_write_bits(intp, ALGOSWRST, 0);
 192
 193         return lock;
 194 }
 195
 196 static int stv0900_sw_algo(struct stv0900_internal *intp,
 197                                 enum fe_stv0900_demod_num demod)
 198 {
 199         int     lock = FALSE,
 200                 no_signal,
 201                 zigzag;
 202         s32     s2fw,
 203                 fqc_inc,
 204                 sft_stp_tout,
 205                 trial_cntr,
 206                 max_steps;
 207
 208         stv0900_get_sw_loop_params(intp, &fqc_inc, &sft_stp_tout,
 209                                         &max_steps, demod);
 210         switch (intp->srch_standard[demod]) {
 211         case STV0900_SEARCH_DVBS1:
 212         case STV0900_SEARCH_DSS:
 213                 if (intp->chip_id >= 0x20)
 214                         stv0900_write_reg(intp, CARFREQ, 0x3b);
 215                 else
 216                         stv0900_write_reg(intp, CARFREQ, 0xef);
 217
 218                 stv0900_write_reg(intp, DMDCFGMD, 0x49);
 219                 zigzag = FALSE;
 220                 break;
 221         case STV0900_SEARCH_DVBS2:
 222                 if (intp->chip_id >= 0x20)
 223                         stv0900_write_reg(intp, CORRELABS, 0x79);
 224                 else
 225                         stv0900_write_reg(intp, CORRELABS, 0x68);
 226
 227                 stv0900_write_reg(intp, DMDCFGMD, 0x89);
 228
 229                 zigzag = TRUE;
 230                 break;
 231         case STV0900_AUTO_SEARCH:
 232         default:
 233                 if (intp->chip_id >= 0x20) {
 234                         stv0900_write_reg(intp, CARFREQ, 0x3b);
 235                         stv0900_write_reg(intp, CORRELABS, 0x79);
 236                 } else {
 237                         stv0900_write_reg(intp, CARFREQ, 0xef);
 238                         stv0900_write_reg(intp, CORRELABS, 0x68);
 239                 }
 240
 241                 stv0900_write_reg(intp, DMDCFGMD, 0xc9);
 242                 zigzag = FALSE;
 243                 break;
 244         }
 245
 246         trial_cntr = 0;
 247         do {
 248                 lock = stv0900_search_carr_sw_loop(intp,
 249                                                 fqc_inc,
 250                                                 sft_stp_tout,
 251                                                 zigzag,
 252                                                 max_steps,
 253                                                 demod);
 254                 no_signal = stv0900_check_signal_presence(intp, demod);
 255                 trial_cntr++;
 256                 if ((lock == TRUE)
 257                                 || (no_signal == TRUE)
 258                                 || (trial_cntr == 2)) {
 259
 260                         if (intp->chip_id >= 0x20) {
 261                                 stv0900_write_reg(intp, CARFREQ, 0x49);
 262                                 stv0900_write_reg(intp, CORRELABS, 0x9e);
 263                         } else {
 264                                 stv0900_write_reg(intp, CARFREQ, 0xed);
 265                                 stv0900_write_reg(intp, CORRELABS, 0x88);
 266                         }
 267
 268                         if ((stv0900_get_bits(intp, HEADER_MODE) ==
 269                                                 STV0900_DVBS2_FOUND) &&
 270                                                         (lock == TRUE)) {
 271                                 msleep(sft_stp_tout);
 272                                 s2fw = stv0900_get_bits(intp, FLYWHEEL_CPT);
 273
 274                                 if (s2fw < 0xd) {
 275                                         msleep(sft_stp_tout);
 276                                         s2fw = stv0900_get_bits(intp,
 277                                                                 FLYWHEEL_CPT);
 278                                 }
 279
 280                                 if (s2fw < 0xd) {
 281                                         lock = FALSE;
 282
 283                                         if (trial_cntr < 2) {
 284                                                 if (intp->chip_id >= 0x20)
 285                                                         stv0900_write_reg(intp,
 286                                                                 CORRELABS,
 287                                                                 0x79);
 288                                                 else
 289                                                         stv0900_write_reg(intp,
 290                                                                 CORRELABS,
 291                                                                 0x68);
 292
 293                                                 stv0900_write_reg(intp,
 294                                                                 DMDCFGMD,
 295                                                                 0x89);
 296                                         }
 297                                 }
 298                         }
 299                 }
 300
 301         } while ((lock == FALSE)
 302                 && (trial_cntr < 2)
 303                 && (no_signal == FALSE));
 304
 305         return lock;
 306 }
 307
 308 static u32 stv0900_get_symbol_rate(struct stv0900_internal *intp,
 309                                         u32 mclk,
 310                                         enum fe_stv0900_demod_num demod)
 311 {
 312         s32     rem1, rem2, intval1, intval2, srate;
 313
 314         srate = (stv0900_get_bits(intp, SYMB_FREQ3) << 24) +
 315                 (stv0900_get_bits(intp, SYMB_FREQ2) << 16) +
 316                 (stv0900_get_bits(intp, SYMB_FREQ1) << 8) +
 317                 (stv0900_get_bits(intp, SYMB_FREQ0));
 318         dprintk("lock: srate=%d r0=0x%x r1=0x%x r2=0x%x r3=0x%x \n",
 319                 srate, stv0900_get_bits(intp, SYMB_FREQ0),
 320                 stv0900_get_bits(intp, SYMB_FREQ1),
 321                 stv0900_get_bits(intp, SYMB_FREQ2),
 322                 stv0900_get_bits(intp, SYMB_FREQ3));
 323
 324         intval1 = (mclk) >> 16;
 325         intval2 = (srate) >> 16;
 326
 327         rem1 = (mclk) % 0x10000;
 328         rem2 = (srate) % 0x10000;
 329         srate = (intval1 * intval2) +
 330                 ((intval1 * rem2) >> 16) +
 331                 ((intval2 * rem1) >> 16);
 332
 333         return srate;
 334 }
 335
 336 static void stv0900_set_symbol_rate(struct stv0900_internal *intp,
 337                                         u32 mclk, u32 srate,
 338                                         enum fe_stv0900_demod_num demod)
 339 {
 340         u32 symb;
 341
 342         dprintk("%s: Mclk %d, SR %d, Dmd %d\n", __func__, mclk,
 343                                                         srate, demod);
 344
 345         if (srate > 60000000) {
 346                 symb = srate << 4;
 347                 symb /= (mclk >> 12);
 348         } else if (srate > 6000000) {
 349                 symb = srate << 6;
 350                 symb /= (mclk >> 10);
 351         } else {
 352                 symb = srate << 9;
 353                 symb /= (mclk >> 7);
 354         }
 355
 356         stv0900_write_reg(intp, SFRINIT1, (symb >> 8) & 0x7f);
 357         stv0900_write_reg(intp, SFRINIT1 + 1, (symb & 0xff));
 358 }
 359
 360 static void stv0900_set_max_symbol_rate(struct stv0900_internal *intp,
 361                                         u32 mclk, u32 srate,
 362                                         enum fe_stv0900_demod_num demod)
 363 {
 364         u32 symb;
 365
 366         srate = 105 * (srate / 100);
 367
 368         if (srate > 60000000) {
 369                 symb = srate << 4;
 370                 symb /= (mclk >> 12);
 371         } else if (srate > 6000000) {
 372                 symb = srate << 6;
 373                 symb /= (mclk >> 10);
 374         } else {
 375                 symb = srate << 9;
 376                 symb /= (mclk >> 7);
 377         }
 378
 379         if (symb < 0x7fff) {
 380                 stv0900_write_reg(intp, SFRUP1, (symb >> 8) & 0x7f);
 381                 stv0900_write_reg(intp, SFRUP1 + 1, (symb & 0xff));
 382         } else {
 383                 stv0900_write_reg(intp, SFRUP1, 0x7f);
 384                 stv0900_write_reg(intp, SFRUP1 + 1, 0xff);
 385         }
 386 }
 387
 388 static void stv0900_set_min_symbol_rate(struct stv0900_internal *intp,
 389                                         u32 mclk, u32 srate,
 390                                         enum fe_stv0900_demod_num demod)
 391 {
 392         u32     symb;
 393
 394         srate = 95 * (srate / 100);
 395         if (srate > 60000000) {
 396                 symb = srate << 4;
 397                 symb /= (mclk >> 12);
 398
 399         } else if (srate > 6000000) {
 400                 symb = srate << 6;
 401                 symb /= (mclk >> 10);
 402
 403         } else {
 404                 symb = srate << 9;
 405                 symb /= (mclk >> 7);
 406         }
 407
 408         stv0900_write_reg(intp, SFRLOW1, (symb >> 8) & 0xff);
 409         stv0900_write_reg(intp, SFRLOW1 + 1, (symb & 0xff));
 410 }
 411
 412 static s32 stv0900_get_timing_offst(struct stv0900_internal *intp,
 413                                         u32 srate,
 414                                         enum fe_stv0900_demod_num demod)
 415 {
 416         s32 timingoffset;
 417
 418
 419         timingoffset = (stv0900_read_reg(intp, TMGREG2) << 16) +
 420                        (stv0900_read_reg(intp, TMGREG2 + 1) << 8) +
 421                        (stv0900_read_reg(intp, TMGREG2 + 2));
 422
 423         timingoffset = ge2comp(timingoffset, 24);
 424
 425
 426         if (timingoffset == 0)
 427                 timingoffset = 1;
 428
 429         timingoffset = ((s32)srate * 10) / ((s32)0x1000000 / timingoffset);
 430         timingoffset /= 320;
 431
 432         return timingoffset;
 433 }
 434
 435 static void stv0900_set_dvbs2_rolloff(struct stv0900_internal *intp,
 436                                         enum fe_stv0900_demod_num demod)
 437 {
 438         s32 rolloff;
 439
 440         if (intp->chip_id == 0x10) {
 441                 stv0900_write_bits(intp, MANUALSX_ROLLOFF, 1);
 442                 rolloff = stv0900_read_reg(intp, MATSTR1) & 0x03;
 443                 stv0900_write_bits(intp, ROLLOFF_CONTROL, rolloff);
 444         } else if (intp->chip_id <= 0x20)
 445                 stv0900_write_bits(intp, MANUALSX_ROLLOFF, 0);
 446         else /* cut 3.0 */
 447                 stv0900_write_bits(intp, MANUALS2_ROLLOFF, 0);
 448 }
 449
 450 static u32 stv0900_carrier_width(u32 srate, enum fe_stv0900_rolloff ro)
 451 {
 452         u32 rolloff;
 453
 454         switch (ro) {
 455         case STV0900_20:
 456                 rolloff = 20;
 457                 break;
 458         case STV0900_25:
 459                 rolloff = 25;
 460                 break;
 461         case STV0900_35:
 462         default:
 463                 rolloff = 35;
 464                 break;
 465         }
 466
 467         return srate  + (srate * rolloff) / 100;
 468 }
 469
 470 static int stv0900_check_timing_lock(struct stv0900_internal *intp,
 471                                 enum fe_stv0900_demod_num demod)
 472 {
 473         int timingLock = FALSE;
 474         s32     i,
 475                 timingcpt = 0;
 476         u8      car_freq,
 477                 tmg_th_high,
 478                 tmg_th_low;
 479
 480         car_freq = stv0900_read_reg(intp, CARFREQ);
 481         tmg_th_high = stv0900_read_reg(intp, TMGTHRISE);
 482         tmg_th_low = stv0900_read_reg(intp, TMGTHFALL);
 483         stv0900_write_reg(intp, TMGTHRISE, 0x20);
 484         stv0900_write_reg(intp, TMGTHFALL, 0x0);
 485         stv0900_write_bits(intp, CFR_AUTOSCAN, 0);
 486         stv0900_write_reg(intp, RTC, 0x80);
 487         stv0900_write_reg(intp, RTCS2, 0x40);
 488         stv0900_write_reg(intp, CARFREQ, 0x0);
 489         stv0900_write_reg(intp, CFRINIT1, 0x0);
 490         stv0900_write_reg(intp, CFRINIT0, 0x0);
 491         stv0900_write_reg(intp, AGC2REF, 0x65);
 492         stv0900_write_reg(intp, DMDISTATE, 0x18);
 493         msleep(7);
 494
 495         for (i = 0; i < 10; i++) {
 496                 if (stv0900_get_bits(intp, TMGLOCK_QUALITY) >= 2)
 497                         timingcpt++;
 498
 499                 msleep(1);
 500         }
 501
 502         if (timingcpt >= 3)
 503                 timingLock = TRUE;
 504
 505         stv0900_write_reg(intp, AGC2REF, 0x38);
 506         stv0900_write_reg(intp, RTC, 0x88);
 507         stv0900_write_reg(intp, RTCS2, 0x68);
 508         stv0900_write_reg(intp, CARFREQ, car_freq);
 509         stv0900_write_reg(intp, TMGTHRISE, tmg_th_high);
 510         stv0900_write_reg(intp, TMGTHFALL, tmg_th_low);
 511
 512         return  timingLock;
 513 }
 514
 515 static int stv0900_get_demod_cold_lock(struct dvb_frontend *fe,
 516                                         s32 demod_timeout)
 517 {
 518         struct stv0900_state *state = fe->demodulator_priv;
 519         struct stv0900_internal *intp = state->internal;
 520         enum fe_stv0900_demod_num demod = state->demod;
 521         int     lock = FALSE,
 522                 d = demod;
 523         s32     srate,
 524                 search_range,
 525                 locktimeout,
 526                 currier_step,
 527                 nb_steps,
 528                 current_step,
 529                 direction,
 530                 tuner_freq,
 531                 timeout,
 532                 freq;
 533
 534         srate = intp->symbol_rate[d];
 535         search_range = intp->srch_range[d];
 536
 537         if (srate >= 10000000)
 538                 locktimeout = demod_timeout / 3;
 539         else
 540                 locktimeout = demod_timeout / 2;
 541
 542         lock = stv0900_get_demod_lock(intp, d, locktimeout);
 543
 544         if (lock != FALSE)
 545                 return lock;
 546
 547         if (srate >= 10000000) {
 548                 if (stv0900_check_timing_lock(intp, d) == TRUE) {
 549                         stv0900_write_reg(intp, DMDISTATE, 0x1f);
 550                         stv0900_write_reg(intp, DMDISTATE, 0x15);
 551                         lock = stv0900_get_demod_lock(intp, d, demod_timeout);
 552                 } else
 553                         lock = FALSE;
 554
 555                 return lock;
 556         }
 557
 558         if (intp->chip_id <= 0x20) {
 559                 if (srate <= 1000000)
 560                         currier_step = 500;
 561                 else if (srate <= 4000000)
 562                         currier_step = 1000;
 563                 else if (srate <= 7000000)
 564                         currier_step = 2000;
 565                 else if (srate <= 10000000)
 566                         currier_step = 3000;
 567                 else
 568                         currier_step = 5000;
 569
 570                 if (srate >= 2000000) {
 571                         timeout = (demod_timeout / 3);
 572                         if (timeout > 1000)
 573                                 timeout = 1000;
 574                 } else
 575                         timeout = (demod_timeout / 2);
 576         } else {
 577                 /*cut 3.0 */
 578                 currier_step = srate / 4000;
 579                 timeout = (demod_timeout * 3) / 4;
 580         }
 581
 582         nb_steps = ((search_range / 1000) / currier_step);
 583
 584         if ((nb_steps % 2) != 0)
 585                 nb_steps += 1;
 586
 587         if (nb_steps <= 0)
 588                 nb_steps = 2;
 589         else if (nb_steps > 12)
 590                 nb_steps = 12;
 591
 592         current_step = 1;
 593         direction = 1;
 594
 595         if (intp->chip_id <= 0x20) {
 596                 tuner_freq = intp->freq[d];
 597                 intp->bw[d] = stv0900_carrier_width(intp->symbol_rate[d],
 598                                 intp->rolloff) + intp->symbol_rate[d];
 599         } else
 600                 tuner_freq = 0;
 601
 602         while ((current_step <= nb_steps) && (lock == FALSE)) {
 603                 if (direction > 0)
 604                         tuner_freq += (current_step * currier_step);
 605                 else
 606                         tuner_freq -= (current_step * currier_step);
 607
 608                 if (intp->chip_id <= 0x20) {
 609                         if (intp->tuner_type[d] == 3)
 610                                 stv0900_set_tuner_auto(intp, tuner_freq,
 611                                                 intp->bw[d], demod);
 612                         else
 613                                 stv0900_set_tuner(fe, tuner_freq, intp->bw[d]);
 614
 615                         stv0900_write_reg(intp, DMDISTATE, 0x1c);
 616                         stv0900_write_reg(intp, CFRINIT1, 0);
 617                         stv0900_write_reg(intp, CFRINIT0, 0);
 618                         stv0900_write_reg(intp, DMDISTATE, 0x1f);
 619                         stv0900_write_reg(intp, DMDISTATE, 0x15);
 620                 } else {
 621                         stv0900_write_reg(intp, DMDISTATE, 0x1c);
 622                         freq = (tuner_freq * 65536) / (intp->mclk / 1000);
 623                         stv0900_write_bits(intp, CFR_INIT1, MSB(freq));
 624                         stv0900_write_bits(intp, CFR_INIT0, LSB(freq));
 625                         stv0900_write_reg(intp, DMDISTATE, 0x1f);
 626                         stv0900_write_reg(intp, DMDISTATE, 0x05);
 627                 }
 628
 629                 lock = stv0900_get_demod_lock(intp, d, timeout);
 630                 direction *= -1;
 631                 current_step++;
 632         }
 633
 634         return  lock;
 635 }
 636
 637 static void stv0900_get_lock_timeout(s32 *demod_timeout, s32 *fec_timeout,
 638                                         s32 srate,
 639                                         enum fe_stv0900_search_algo algo)
 640 {
 641         switch (algo) {
 642         case STV0900_BLIND_SEARCH:
 643                 if (srate <= 1500000) {
 644                         (*demod_timeout) = 1500;
 645                         (*fec_timeout) = 400;
 646                 } else if (srate <= 5000000) {
 647                         (*demod_timeout) = 1000;
 648                         (*fec_timeout) = 300;
 649                 } else {
 650                         (*demod_timeout) = 700;
 651                         (*fec_timeout) = 100;
 652                 }
 653
 654                 break;
 655         case STV0900_COLD_START:
 656         case STV0900_WARM_START:
 657         default:
 658                 if (srate <= 1000000) {
 659                         (*demod_timeout) = 3000;
 660                         (*fec_timeout) = 1700;
 661                 } else if (srate <= 2000000) {
 662                         (*demod_timeout) = 2500;
 663                         (*fec_timeout) = 1100;
 664                 } else if (srate <= 5000000) {
 665                         (*demod_timeout) = 1000;
 666                         (*fec_timeout) = 550;
 667                 } else if (srate <= 10000000) {
 668                         (*demod_timeout) = 700;
 669                         (*fec_timeout) = 250;
 670                 } else if (srate <= 20000000) {
 671                         (*demod_timeout) = 400;
 672                         (*fec_timeout) = 130;
 673                 } else {
 674                         (*demod_timeout) = 300;
 675                         (*fec_timeout) = 100;
 676                 }
 677
 678                 break;
 679
 680         }
 681
 682         if (algo == STV0900_WARM_START)
 683                 (*demod_timeout) /= 2;
 684 }
 685
 686 static void stv0900_set_viterbi_tracq(struct stv0900_internal *intp,
 687                                         enum fe_stv0900_demod_num demod)
 688 {
 689
 690         s32 vth_reg = VTH12;
 691
 692         dprintk("%s\n", __func__);
 693
 694         stv0900_write_reg(intp, vth_reg++, 0xd0);
 695         stv0900_write_reg(intp, vth_reg++, 0x7d);
 696         stv0900_write_reg(intp, vth_reg++, 0x53);
 697         stv0900_write_reg(intp, vth_reg++, 0x2f);
 698         stv0900_write_reg(intp, vth_reg++, 0x24);
 699         stv0900_write_reg(intp, vth_reg++, 0x1f);
 700 }
 701
 702 static void stv0900_set_viterbi_standard(struct stv0900_internal *intp,
 703                                    enum fe_stv0900_search_standard standard,
 704                                    enum fe_stv0900_fec fec,
 705                                    enum fe_stv0900_demod_num demod)
 706 {
 707         dprintk("%s: ViterbiStandard = ", __func__);
 708
 709         switch (standard) {
 710         case STV0900_AUTO_SEARCH:
 711                 dprintk("Auto\n");
 712                 stv0900_write_reg(intp, FECM, 0x10);
 713                 stv0900_write_reg(intp, PRVIT, 0x3f);
 714                 break;
 715         case STV0900_SEARCH_DVBS1:
 716                 dprintk("DVBS1\n");
 717                 stv0900_write_reg(intp, FECM, 0x00);
 718                 switch (fec) {
 719                 case STV0900_FEC_UNKNOWN:
 720                 default:
 721                         stv0900_write_reg(intp, PRVIT, 0x2f);
 722                         break;
 723                 case STV0900_FEC_1_2:
 724                         stv0900_write_reg(intp, PRVIT, 0x01);
 725                         break;
 726                 case STV0900_FEC_2_3:
 727                         stv0900_write_reg(intp, PRVIT, 0x02);
 728                         break;
 729                 case STV0900_FEC_3_4:
 730                         stv0900_write_reg(intp, PRVIT, 0x04);
 731                         break;
 732                 case STV0900_FEC_5_6:
 733                         stv0900_write_reg(intp, PRVIT, 0x08);
 734                         break;
 735                 case STV0900_FEC_7_8:
 736                         stv0900_write_reg(intp, PRVIT, 0x20);
 737                         break;
 738                 }
 739
 740                 break;
 741         case STV0900_SEARCH_DSS:
 742                 dprintk("DSS\n");
 743                 stv0900_write_reg(intp, FECM, 0x80);
 744                 switch (fec) {
 745                 case STV0900_FEC_UNKNOWN:
 746                 default:
 747                         stv0900_write_reg(intp, PRVIT, 0x13);
 748                         break;
 749                 case STV0900_FEC_1_2:
 750                         stv0900_write_reg(intp, PRVIT, 0x01);
 751                         break;
 752                 case STV0900_FEC_2_3:
 753                         stv0900_write_reg(intp, PRVIT, 0x02);
 754                         break;
 755                 case STV0900_FEC_6_7:
 756                         stv0900_write_reg(intp, PRVIT, 0x10);
 757                         break;
 758                 }
 759                 break;
 760         default:
 761                 break;
 762         }
 763 }
 764
 765 static enum fe_stv0900_fec stv0900_get_vit_fec(struct stv0900_internal *intp,
 766                                                 enum fe_stv0900_demod_num demod)
 767 {
 768         enum fe_stv0900_fec prate;
 769         s32 rate_fld = stv0900_get_bits(intp, VIT_CURPUN);
 770
 771         switch (rate_fld) {
 772         case 13:
 773                 prate = STV0900_FEC_1_2;
 774                 break;
 775         case 18:
 776                 prate = STV0900_FEC_2_3;
 777                 break;
 778         case 21:
 779                 prate = STV0900_FEC_3_4;
 780                 break;
 781         case 24:
 782                 prate = STV0900_FEC_5_6;
 783                 break;
 784         case 25:
 785                 prate = STV0900_FEC_6_7;
 786                 break;
 787         case 26:
 788                 prate = STV0900_FEC_7_8;
 789                 break;
 790         default:
 791                 prate = STV0900_FEC_UNKNOWN;
 792                 break;
 793         }
 794
 795         return prate;
 796 }
 797
 798 static void stv0900_set_dvbs1_track_car_loop(struct stv0900_internal *intp,
 799                                         enum fe_stv0900_demod_num demod,
 800                                         u32 srate)
 801 {
 802         if (intp->chip_id >= 0x30) {
 803                 if (srate >= 15000000) {
 804                         stv0900_write_reg(intp, ACLC, 0x2b);
 805                         stv0900_write_reg(intp, BCLC, 0x1a);
 806                 } else if ((srate >= 7000000) && (15000000 > srate)) {
 807                         stv0900_write_reg(intp, ACLC, 0x0c);
 808                         stv0900_write_reg(intp, BCLC, 0x1b);
 809                 } else if (srate < 7000000) {
 810                         stv0900_write_reg(intp, ACLC, 0x2c);
 811                         stv0900_write_reg(intp, BCLC, 0x1c);
 812                 }
 813
 814         } else { /*cut 2.0 and 1.x*/
 815                 stv0900_write_reg(intp, ACLC, 0x1a);
 816                 stv0900_write_reg(intp, BCLC, 0x09);
 817         }
 818
 819 }
 820
 821 static void stv0900_track_optimization(struct dvb_frontend *fe)
 822 {
 823         struct stv0900_state *state = fe->demodulator_priv;
 824         struct stv0900_internal *intp = state->internal;
 825         enum fe_stv0900_demod_num demod = state->demod;
 826
 827         s32     srate,
 828                 pilots,
 829                 aclc,
 830                 freq1,
 831                 freq0,
 832                 i = 0,
 833                 timed,
 834                 timef,
 835                 blind_tun_sw = 0,
 836                 modulation;
 837
 838         enum fe_stv0900_modcode foundModcod;
 839
 840         dprintk("%s\n", __func__);
 841
 842         srate = stv0900_get_symbol_rate(intp, intp->mclk, demod);
 843         srate += stv0900_get_timing_offst(intp, srate, demod);
 844
 845         switch (intp->result[demod].standard) {
 846         case STV0900_DVBS1_STANDARD:
 847         case STV0900_DSS_STANDARD:
 848                 dprintk("%s: found DVB-S or DSS\n", __func__);
 849                 if (intp->srch_standard[demod] == STV0900_AUTO_SEARCH) {
 850                         stv0900_write_bits(intp, DVBS1_ENABLE, 1);
 851                         stv0900_write_bits(intp, DVBS2_ENABLE, 0);
 852                 }
 853
 854                 stv0900_write_bits(intp, ROLLOFF_CONTROL, intp->rolloff);
 855                 stv0900_write_bits(intp, MANUALSX_ROLLOFF, 1);
 856
 857                 if (intp->chip_id < 0x30) {
 858                         stv0900_write_reg(intp, ERRCTRL1, 0x75);
 859                         break;
 860                 }
 861
 862                 if (stv0900_get_vit_fec(intp, demod) == STV0900_FEC_1_2) {
 863                         stv0900_write_reg(intp, GAUSSR0, 0x98);
 864                         stv0900_write_reg(intp, CCIR0, 0x18);
 865                 } else {
 866                         stv0900_write_reg(intp, GAUSSR0, 0x18);
 867                         stv0900_write_reg(intp, CCIR0, 0x18);
 868                 }
 869
 870                 stv0900_write_reg(intp, ERRCTRL1, 0x75);
 871                 break;
 872         case STV0900_DVBS2_STANDARD:
 873                 dprintk("%s: found DVB-S2\n", __func__);
 874                 stv0900_write_bits(intp, DVBS1_ENABLE, 0);
 875                 stv0900_write_bits(intp, DVBS2_ENABLE, 1);
 876                 stv0900_write_reg(intp, ACLC, 0);
 877                 stv0900_write_reg(intp, BCLC, 0);
 878                 if (intp->result[demod].frame_len == STV0900_LONG_FRAME) {
 879                         foundModcod = stv0900_get_bits(intp, DEMOD_MODCOD);
 880                         pilots = stv0900_get_bits(intp, DEMOD_TYPE) & 0x01;
 881                         aclc = stv0900_get_optim_carr_loop(srate,
 882                                                         foundModcod,
 883                                                         pilots,
 884                                                         intp->chip_id);
 885                         if (foundModcod <= STV0900_QPSK_910)
 886                                 stv0900_write_reg(intp, ACLC2S2Q, aclc);
 887                         else if (foundModcod <= STV0900_8PSK_910) {
 888                                 stv0900_write_reg(intp, ACLC2S2Q, 0x2a);
 889                                 stv0900_write_reg(intp, ACLC2S28, aclc);
 890                         }
 891
 892                         if ((intp->demod_mode == STV0900_SINGLE) &&
 893                                         (foundModcod > STV0900_8PSK_910)) {
 894                                 if (foundModcod <= STV0900_16APSK_910) {
 895                                         stv0900_write_reg(intp, ACLC2S2Q, 0x2a);
 896                                         stv0900_write_reg(intp, ACLC2S216A,
 897                                                                         aclc);
 898                                 } else if (foundModcod <= STV0900_32APSK_910) {
 899                                         stv0900_write_reg(intp, ACLC2S2Q, 0x2a);
 900                                         stv0900_write_reg(intp, ACLC2S232A,
 901                                                                         aclc);
 902                                 }
 903                         }
 904
 905                 } else {
 906                         modulation = intp->result[demod].modulation;
 907                         aclc = stv0900_get_optim_short_carr_loop(srate,
 908                                         modulation, intp->chip_id);
 909                         if (modulation == STV0900_QPSK)
 910                                 stv0900_write_reg(intp, ACLC2S2Q, aclc);
 911                         else if (modulation == STV0900_8PSK) {
 912                                 stv0900_write_reg(intp, ACLC2S2Q, 0x2a);
 913                                 stv0900_write_reg(intp, ACLC2S28, aclc);
 914                         } else if (modulation == STV0900_16APSK) {
 915                                 stv0900_write_reg(intp, ACLC2S2Q, 0x2a);
 916                                 stv0900_write_reg(intp, ACLC2S216A, aclc);
 917                         } else if (modulation == STV0900_32APSK) {
 918                                 stv0900_write_reg(intp, ACLC2S2Q, 0x2a);
 919                                 stv0900_write_reg(intp, ACLC2S232A, aclc);
 920                         }
 921
 922                 }
 923
 924                 if (intp->chip_id <= 0x11) {
 925                         if (intp->demod_mode != STV0900_SINGLE)
 926                                 stv0900_activate_s2_modcod(intp, demod);
 927
 928                 }
 929
 930                 stv0900_write_reg(intp, ERRCTRL1, 0x67);
 931                 break;
 932         case STV0900_UNKNOWN_STANDARD:
 933         default:
 934                 dprintk("%s: found unknown standard\n", __func__);
 935                 stv0900_write_bits(intp, DVBS1_ENABLE, 1);
 936                 stv0900_write_bits(intp, DVBS2_ENABLE, 1);
 937                 break;
 938         }
 939
 940         freq1 = stv0900_read_reg(intp, CFR2);
 941         freq0 = stv0900_read_reg(intp, CFR1);
 942         if (intp->srch_algo[demod] == STV0900_BLIND_SEARCH) {
 943                 stv0900_write_reg(intp, SFRSTEP, 0x00);
 944                 stv0900_write_bits(intp, SCAN_ENABLE, 0);
 945                 stv0900_write_bits(intp, CFR_AUTOSCAN, 0);
 946                 stv0900_write_reg(intp, TMGCFG2, 0xc1);
 947                 stv0900_set_symbol_rate(intp, intp->mclk, srate, demod);
 948                 blind_tun_sw = 1;
 949                 if (intp->result[demod].standard != STV0900_DVBS2_STANDARD)
 950                         stv0900_set_dvbs1_track_car_loop(intp, demod, srate);
 951
 952         }
 953
 954         if (intp->chip_id >= 0x20) {
 955                 if ((intp->srch_standard[demod] == STV0900_SEARCH_DVBS1) ||
 956                                 (intp->srch_standard[demod] ==
 957                                                         STV0900_SEARCH_DSS) ||
 958                                 (intp->srch_standard[demod] ==
 959                                                         STV0900_AUTO_SEARCH)) {
 960                         stv0900_write_reg(intp, VAVSRVIT, 0x0a);
 961                         stv0900_write_reg(intp, VITSCALE, 0x0);
 962                 }
 963         }
 964
 965         if (intp->chip_id < 0x20)
 966                 stv0900_write_reg(intp, CARHDR, 0x08);
 967
 968         if (intp->chip_id == 0x10)
 969                 stv0900_write_reg(intp, CORRELEXP, 0x0a);
 970
 971         stv0900_write_reg(intp, AGC2REF, 0x38);
 972
 973         if ((intp->chip_id >= 0x20) ||
 974                         (blind_tun_sw == 1) ||
 975                         (intp->symbol_rate[demod] < 10000000)) {
 976                 stv0900_write_reg(intp, CFRINIT1, freq1);
 977                 stv0900_write_reg(intp, CFRINIT0, freq0);
 978                 intp->bw[demod] = stv0900_carrier_width(srate,
 979                                         intp->rolloff) + 10000000;
 980
 981                 if ((intp->chip_id >= 0x20) || (blind_tun_sw == 1)) {
 982                         if (intp->srch_algo[demod] != STV0900_WARM_START) {
 983                                 if (intp->tuner_type[demod] == 3)
 984                                         stv0900_set_tuner_auto(intp,
 985                                                         intp->freq[demod],
 986                                                         intp->bw[demod],
 987                                                         demod);
 988                                 else
 989                                         stv0900_set_bandwidth(fe,
 990                                                         intp->bw[demod]);
 991                         }
 992                 }
 993
 994                 if ((intp->srch_algo[demod] == STV0900_BLIND_SEARCH) ||
 995                                 (intp->symbol_rate[demod] < 10000000))
 996                         msleep(50);
 997                 else
 998                         msleep(5);
 999
1000                 stv0900_get_lock_timeout(&timed, &timef, srate,
1001                                                 STV0900_WARM_START);
1002
1003                 if (stv0900_get_demod_lock(intp, demod, timed / 2) == FALSE) {
1004                         stv0900_write_reg(intp, DMDISTATE, 0x1f);
1005                         stv0900_write_reg(intp, CFRINIT1, freq1);
1006                         stv0900_write_reg(intp, CFRINIT0, freq0);
1007                         stv0900_write_reg(intp, DMDISTATE, 0x18);
1008                         i = 0;
1009                         while ((stv0900_get_demod_lock(intp,
1010                                                         demod,
1011                                                         timed / 2) == FALSE) &&
1012                                                 (i <= 2)) {
1013                                 stv0900_write_reg(intp, DMDISTATE, 0x1f);
1014                                 stv0900_write_reg(intp, CFRINIT1, freq1);
1015                                 stv0900_write_reg(intp, CFRINIT0, freq0);
1016                                 stv0900_write_reg(intp, DMDISTATE, 0x18);
1017                                 i++;
1018                         }
1019                 }
1020
1021         }
1022
1023         if (intp->chip_id >= 0x20)
1024                 stv0900_write_reg(intp, CARFREQ, 0x49);
1025
1026         if ((intp->result[demod].standard == STV0900_DVBS1_STANDARD) ||
1027                         (intp->result[demod].standard == STV0900_DSS_STANDARD))
1028                 stv0900_set_viterbi_tracq(intp, demod);
1029
1030 }
1031
1032 static int stv0900_get_fec_lock(struct stv0900_internal *intp,
1033                                 enum fe_stv0900_demod_num demod, s32 time_out)
1034 {
1035         s32 timer = 0, lock = 0;
1036
1037         enum fe_stv0900_search_state dmd_state;
1038
1039         dprintk("%s\n", __func__);
1040
1041         dmd_state = stv0900_get_bits(intp, HEADER_MODE);
1042
1043         while ((timer < time_out) && (lock == 0)) {
1044                 switch (dmd_state) {
1045                 case STV0900_SEARCH:
1046                 case STV0900_PLH_DETECTED:
1047                 default:
1048                         lock = 0;
1049                         break;
1050                 case STV0900_DVBS2_FOUND:
1051                         lock = stv0900_get_bits(intp, PKTDELIN_LOCK);
1052                         break;
1053                 case STV0900_DVBS_FOUND:
1054                         lock = stv0900_get_bits(intp, LOCKEDVIT);
1055                         break;
1056                 }
1057
1058                 if (lock == 0) {
1059                         msleep(10);
1060                         timer += 10;
1061                 }
1062         }
1063
1064         if (lock)
1065                 dprintk("%s: DEMOD FEC LOCK OK\n", __func__);
1066         else
1067                 dprintk("%s: DEMOD FEC LOCK FAIL\n", __func__);
1068
1069         return lock;
1070 }
1071
1072 static int stv0900_wait_for_lock(struct stv0900_internal *intp,
1073                                 enum fe_stv0900_demod_num demod,
1074                                 s32 dmd_timeout, s32 fec_timeout)
1075 {
1076
1077         s32 timer = 0, lock = 0;
1078
1079         dprintk("%s\n", __func__);
1080
1081         lock = stv0900_get_demod_lock(intp, demod, dmd_timeout);
1082
1083         if (lock)
1084                 lock = stv0900_get_fec_lock(intp, demod, fec_timeout);
1085
1086         if (lock) {
1087                 lock = 0;
1088
1089                 dprintk("%s: Timer = %d, time_out = %d\n",
1090                                 __func__, timer, fec_timeout);
1091
1092                 while ((timer < fec_timeout) && (lock == 0)) {
1093                         lock = stv0900_get_bits(intp, TSFIFO_LINEOK);
1094                         msleep(1);
1095                         timer++;
1096                 }
1097         }
1098
1099         if (lock)
1100                 dprintk("%s: DEMOD LOCK OK\n", __func__);
1101         else
1102                 dprintk("%s: DEMOD LOCK FAIL\n", __func__);
1103
1104         if (lock)
1105                 return TRUE;
1106         else
1107                 return FALSE;
1108 }
1109
1110 enum fe_stv0900_tracking_standard stv0900_get_standard(struct dvb_frontend *fe,
1111                                                 enum fe_stv0900_demod_num demod)
1112 {
1113         struct stv0900_state *state = fe->demodulator_priv;
1114         struct stv0900_internal *intp = state->internal;
1115         enum fe_stv0900_tracking_standard fnd_standard;
1116
1117         int hdr_mode = stv0900_get_bits(intp, HEADER_MODE);
1118
1119         switch (hdr_mode) {
1120         case 2:
1121                 fnd_standard = STV0900_DVBS2_STANDARD;
1122                 break;
1123         case 3:
1124                 if (stv0900_get_bits(intp, DSS_DVB) == 1)
1125                         fnd_standard = STV0900_DSS_STANDARD;
1126                 else
1127                         fnd_standard = STV0900_DVBS1_STANDARD;
1128
1129                 break;
1130         default:
1131                 fnd_standard = STV0900_UNKNOWN_STANDARD;
1132         }
1133
1134         dprintk("%s: standard %d\n", __func__, fnd_standard);
1135
1136         return fnd_standard;
1137 }
1138
1139 static s32 stv0900_get_carr_freq(struct stv0900_internal *intp, u32 mclk,
1140                                         enum fe_stv0900_demod_num demod)
1141 {
1142         s32     derot,
1143                 rem1,
1144                 rem2,
1145                 intval1,
1146                 intval2;
1147
1148         derot = (stv0900_get_bits(intp, CAR_FREQ2) << 16) +
1149                 (stv0900_get_bits(intp, CAR_FREQ1) << 8) +
1150                 (stv0900_get_bits(intp, CAR_FREQ0));
1151
1152         derot = ge2comp(derot, 24);
1153         intval1 = mclk >> 12;
1154         intval2 = derot >> 12;
1155         rem1 = mclk % 0x1000;
1156         rem2 = derot % 0x1000;
1157         derot = (intval1 * intval2) +
1158                 ((intval1 * rem2) >> 12) +
1159                 ((intval2 * rem1) >> 12);
1160
1161         return derot;
1162 }
1163
1164 static u32 stv0900_get_tuner_freq(struct dvb_frontend *fe)
1165 {
1166         struct dvb_frontend_ops *frontend_ops = NULL;
1167         struct dvb_tuner_ops *tuner_ops = NULL;
1168         u32 freq = 0;
1169
1170         frontend_ops = &fe->ops;
1171         tuner_ops = &frontend_ops->tuner_ops;
1172
1173         if (tuner_ops->get_frequency) {
1174                 if ((tuner_ops->get_frequency(fe, &freq)) < 0)
1175                         dprintk("%s: Invalid parameter\n", __func__);
1176                 else
1177                         dprintk("%s: Frequency=%d\n", __func__, freq);
1178
1179         }
1180
1181         return freq;
1182 }
1183
1184 static enum
1185 fe_stv0900_signal_type stv0900_get_signal_params(struct dvb_frontend *fe)
1186 {
1187         struct stv0900_state *state = fe->demodulator_priv;
1188         struct stv0900_internal *intp = state->internal;
1189         enum fe_stv0900_demod_num demod = state->demod;
1190         enum fe_stv0900_signal_type range = STV0900_OUTOFRANGE;
1191         struct stv0900_signal_info *result = &intp->result[demod];
1192         s32     offsetFreq,
1193                 srate_offset;
1194         int     i = 0,
1195                 d = demod;
1196
1197         u8 timing;
1198
1199         msleep(5);
1200         if (intp->srch_algo[d] == STV0900_BLIND_SEARCH) {
1201                 timing = stv0900_read_reg(intp, TMGREG2);
1202                 i = 0;
1203                 stv0900_write_reg(intp, SFRSTEP, 0x5c);
1204
1205                 while ((i <= 50) && (timing != 0) && (timing != 0xff)) {
1206                         timing = stv0900_read_reg(intp, TMGREG2);
1207                         msleep(5);
1208                         i += 5;
1209                 }
1210         }
1211
1212         result->standard = stv0900_get_standard(fe, d);
1213         if (intp->tuner_type[demod] == 3)
1214                 result->frequency = stv0900_get_freq_auto(intp, d);
1215         else
1216                 result->frequency = stv0900_get_tuner_freq(fe);
1217
1218         offsetFreq = stv0900_get_carr_freq(intp, intp->mclk, d) / 1000;
1219         result->frequency += offsetFreq;
1220         result->symbol_rate = stv0900_get_symbol_rate(intp, intp->mclk, d);
1221         srate_offset = stv0900_get_timing_offst(intp, result->symbol_rate, d);
1222         result->symbol_rate += srate_offset;
1223         result->fec = stv0900_get_vit_fec(intp, d);
1224         result->modcode = stv0900_get_bits(intp, DEMOD_MODCOD);
1225         result->pilot = stv0900_get_bits(intp, DEMOD_TYPE) & 0x01;
1226         result->frame_len = ((u32)stv0900_get_bits(intp, DEMOD_TYPE)) >> 1;
1227         result->rolloff = stv0900_get_bits(intp, ROLLOFF_STATUS);
1228
1229         dprintk("%s: modcode=0x%x \n", __func__, result->modcode);
1230
1231         switch (result->standard) {
1232         case STV0900_DVBS2_STANDARD:
1233                 result->spectrum = stv0900_get_bits(intp, SPECINV_DEMOD);
1234                 if (result->modcode <= STV0900_QPSK_910)
1235                         result->modulation = STV0900_QPSK;
1236                 else if (result->modcode <= STV0900_8PSK_910)
1237                         result->modulation = STV0900_8PSK;
1238                 else if (result->modcode <= STV0900_16APSK_910)
1239                         result->modulation = STV0900_16APSK;
1240                 else if (result->modcode <= STV0900_32APSK_910)
1241                         result->modulation = STV0900_32APSK;
1242                 else
1243                         result->modulation = STV0900_UNKNOWN;
1244                 break;
1245         case STV0900_DVBS1_STANDARD:
1246         case STV0900_DSS_STANDARD:
1247                 result->spectrum = stv0900_get_bits(intp, IQINV);
1248                 result->modulation = STV0900_QPSK;
1249                 break;
1250         default:
1251                 break;
1252         }
1253
1254         if ((intp->srch_algo[d] == STV0900_BLIND_SEARCH) ||
1255                                 (intp->symbol_rate[d] < 10000000)) {
1256                 offsetFreq = result->frequency - intp->freq[d];
1257                 if (intp->tuner_type[demod] == 3)
1258                         intp->freq[d] = stv0900_get_freq_auto(intp, d);
1259                 else
1260                         intp->freq[d] = stv0900_get_tuner_freq(fe);
1261
1262                 if (ABS(offsetFreq) <= ((intp->srch_range[d] / 2000) + 500))
1263                         range = STV0900_RANGEOK;
1264                 else if (ABS(offsetFreq) <=
1265                                 (stv0900_carrier_width(result->symbol_rate,
1266                                                 result->rolloff) / 2000))
1267                         range = STV0900_RANGEOK;
1268
1269         } else if (ABS(offsetFreq) <= ((intp->srch_range[d] / 2000) + 500))
1270                 range = STV0900_RANGEOK;
1271
1272         dprintk("%s: range %d\n", __func__, range);
1273
1274         return range;
1275 }
1276
1277 static enum
1278 fe_stv0900_signal_type stv0900_dvbs1_acq_workaround(struct dvb_frontend *fe)
1279 {
1280         struct stv0900_state *state = fe->demodulator_priv;
1281         struct stv0900_internal *intp = state->internal;
1282         enum fe_stv0900_demod_num demod = state->demod;
1283         enum fe_stv0900_signal_type signal_type = STV0900_NODATA;
1284
1285         s32     srate,
1286                 demod_timeout,
1287                 fec_timeout,
1288                 freq1,
1289                 freq0;
1290
1291         intp->result[demod].locked = FALSE;
1292
1293         if (stv0900_get_bits(intp, HEADER_MODE) == STV0900_DVBS_FOUND) {
1294                 srate = stv0900_get_symbol_rate(intp, intp->mclk, demod);
1295                 srate += stv0900_get_timing_offst(intp, srate, demod);
1296                 if (intp->srch_algo[demod] == STV0900_BLIND_SEARCH)
1297                         stv0900_set_symbol_rate(intp, intp->mclk, srate, demod);
1298
1299                 stv0900_get_lock_timeout(&demod_timeout, &fec_timeout,
1300                                         srate, STV0900_WARM_START);
1301                 freq1 = stv0900_read_reg(intp, CFR2);
1302                 freq0 = stv0900_read_reg(intp, CFR1);
1303                 stv0900_write_bits(intp, CFR_AUTOSCAN, 0);
1304                 stv0900_write_bits(intp, SPECINV_CONTROL,
1305                                         STV0900_IQ_FORCE_SWAPPED);
1306                 stv0900_write_reg(intp, DMDISTATE, 0x1c);
1307                 stv0900_write_reg(intp, CFRINIT1, freq1);
1308                 stv0900_write_reg(intp, CFRINIT0, freq0);
1309                 stv0900_write_reg(intp, DMDISTATE, 0x18);
1310                 if (stv0900_wait_for_lock(intp, demod,
1311                                 demod_timeout, fec_timeout) == TRUE) {
1312                         intp->result[demod].locked = TRUE;
1313                         signal_type = stv0900_get_signal_params(fe);
1314                         stv0900_track_optimization(fe);
1315                 } else {
1316                         stv0900_write_bits(intp, SPECINV_CONTROL,
1317                                         STV0900_IQ_FORCE_NORMAL);
1318                         stv0900_write_reg(intp, DMDISTATE, 0x1c);
1319                         stv0900_write_reg(intp, CFRINIT1, freq1);
1320                         stv0900_write_reg(intp, CFRINIT0, freq0);
1321                         stv0900_write_reg(intp, DMDISTATE, 0x18);
1322                         if (stv0900_wait_for_lock(intp, demod,
1323                                         demod_timeout, fec_timeout) == TRUE) {
1324                                 intp->result[demod].locked = TRUE;
1325                                 signal_type = stv0900_get_signal_params(fe);
1326                                 stv0900_track_optimization(fe);
1327                         }
1328
1329                 }
1330
1331         } else
1332                 intp->result[demod].locked = FALSE;
1333
1334         return signal_type;
1335 }
1336
1337 static u16 stv0900_blind_check_agc2_min_level(struct stv0900_internal *intp,
1338                                         enum fe_stv0900_demod_num demod)
1339 {
1340         u32 minagc2level = 0xffff,
1341                 agc2level,
1342                 init_freq, freq_step;
1343
1344         s32 i, j, nb_steps, direction;
1345
1346         dprintk("%s\n", __func__);
1347
1348         stv0900_write_reg(intp, AGC2REF, 0x38);
1349         stv0900_write_bits(intp, SCAN_ENABLE, 0);
1350         stv0900_write_bits(intp, CFR_AUTOSCAN, 0);
1351
1352         stv0900_write_bits(intp, AUTO_GUP, 1);
1353         stv0900_write_bits(intp, AUTO_GLOW, 1);
1354
1355         stv0900_write_reg(intp, DMDT0M, 0x0);
1356
1357         stv0900_set_symbol_rate(intp, intp->mclk, 1000000, demod);
1358         nb_steps = -1 + (intp->srch_range[demod] / 1000000);
1359         nb_steps /= 2;
1360         nb_steps = (2 * nb_steps) + 1;
1361
1362         if (nb_steps < 0)
1363                 nb_steps = 1;
1364
1365         direction = 1;
1366
1367         freq_step = (1000000 << 8) / (intp->mclk >> 8);
1368
1369         init_freq = 0;
1370
1371         for (i = 0; i < nb_steps; i++) {
1372                 if (direction > 0)
1373                         init_freq = init_freq + (freq_step * i);
1374                 else
1375                         init_freq = init_freq - (freq_step * i);
1376
1377                 direction *= -1;
1378                 stv0900_write_reg(intp, DMDISTATE, 0x5C);
1379                 stv0900_write_reg(intp, CFRINIT1, (init_freq >> 8) & 0xff);
1380                 stv0900_write_reg(intp, CFRINIT0, init_freq  & 0xff);
1381                 stv0900_write_reg(intp, DMDISTATE, 0x58);
1382                 msleep(10);
1383                 agc2level = 0;
1384
1385                 for (j = 0; j < 10; j++)
1386                         agc2level += (stv0900_read_reg(intp, AGC2I1) << 8)
1387                                         | stv0900_read_reg(intp, AGC2I0);
1388
1389                 agc2level /= 10;
1390
1391                 if (agc2level < minagc2level)
1392                         minagc2level = agc2level;
1393
1394         }
1395
1396         return (u16)minagc2level;
1397 }
1398
1399 static u32 stv0900_search_srate_coarse(struct dvb_frontend *fe)
1400 {
1401         struct stv0900_state *state = fe->demodulator_priv;
1402         struct stv0900_internal *intp = state->internal;
1403         enum fe_stv0900_demod_num demod = state->demod;
1404         int timing_lck = FALSE;
1405         s32 i, timingcpt = 0,
1406                 direction = 1,
1407                 nb_steps,
1408                 current_step = 0,
1409                 tuner_freq;
1410         u32 agc2_th,
1411                 coarse_srate = 0,
1412                 agc2_integr = 0,
1413                 currier_step = 1200;
1414
1415         if (intp->chip_id >= 0x30)
1416                 agc2_th = 0x2e00;
1417         else
1418                 agc2_th = 0x1f00;
1419
1420         stv0900_write_bits(intp, DEMOD_MODE, 0x1f);
1421         stv0900_write_reg(intp, TMGCFG, 0x12);
1422         stv0900_write_reg(intp, TMGTHRISE, 0xf0);
1423         stv0900_write_reg(intp, TMGTHFALL, 0xe0);
1424         stv0900_write_bits(intp, SCAN_ENABLE, 1);
1425         stv0900_write_bits(intp, CFR_AUTOSCAN, 1);
1426         stv0900_write_reg(intp, SFRUP1, 0x83);
1427         stv0900_write_reg(intp, SFRUP0, 0xc0);
1428         stv0900_write_reg(intp, SFRLOW1, 0x82);
1429         stv0900_write_reg(intp, SFRLOW0, 0xa0);
1430         stv0900_write_reg(intp, DMDT0M, 0x0);
1431         stv0900_write_reg(intp, AGC2REF, 0x50);
1432
1433         if (intp->chip_id >= 0x30) {
1434                 stv0900_write_reg(intp, CARFREQ, 0x99);
1435                 stv0900_write_reg(intp, SFRSTEP, 0x98);
1436         } else if (intp->chip_id >= 0x20) {
1437                 stv0900_write_reg(intp, CARFREQ, 0x6a);
1438                 stv0900_write_reg(intp, SFRSTEP, 0x95);
1439         } else {
1440                 stv0900_write_reg(intp, CARFREQ, 0xed);
1441                 stv0900_write_reg(intp, SFRSTEP, 0x73);
1442         }
1443
1444         if (intp->symbol_rate[demod] <= 2000000)
1445                 currier_step = 1000;
1446         else if (intp->symbol_rate[demod] <= 5000000)
1447                 currier_step = 2000;
1448         else if (intp->symbol_rate[demod] <= 12000000)
1449                 currier_step = 3000;
1450         else
1451                         currier_step = 5000;
1452
1453         nb_steps = -1 + ((intp->srch_range[demod] / 1000) / currier_step);
1454         nb_steps /= 2;
1455         nb_steps = (2 * nb_steps) + 1;
1456
1457         if (nb_steps < 0)
1458                 nb_steps = 1;
1459         else if (nb_steps > 10) {
1460                 nb_steps = 11;
1461                 currier_step = (intp->srch_range[demod] / 1000) / 10;
1462         }
1463
1464         current_step = 0;
1465         direction = 1;
1466
1467         tuner_freq = intp->freq[demod];
1468
1469         while ((timing_lck == FALSE) && (current_step < nb_steps)) {
1470                 stv0900_write_reg(intp, DMDISTATE, 0x5f);
1471                 stv0900_write_bits(intp, DEMOD_MODE, 0);
1472
1473                 msleep(50);
1474
1475                 for (i = 0; i < 10; i++) {
1476                         if (stv0900_get_bits(intp, TMGLOCK_QUALITY) >= 2)
1477                                 timingcpt++;
1478
1479                         agc2_integr += (stv0900_read_reg(intp, AGC2I1) << 8) |
1480                                         stv0900_read_reg(intp, AGC2I0);
1481                 }
1482
1483                 agc2_integr /= 10;
1484                 coarse_srate = stv0900_get_symbol_rate(intp, intp->mclk, demod);
1485                 current_step++;
1486                 direction *= -1;
1487
1488                 dprintk("lock: I2C_DEMOD_MODE_FIELD =0. Search started."
1489                         " tuner freq=%d agc2=0x%x srate_coarse=%d tmg_cpt=%d\n",
1490                         tuner_freq, agc2_integr, coarse_srate, timingcpt);
1491
1492                 if ((timingcpt >= 5) &&
1493                                 (agc2_integr < agc2_th) &&
1494                                 (coarse_srate < 55000000) &&
1495                                 (coarse_srate > 850000))
1496                         timing_lck = TRUE;
1497                 else if (current_step < nb_steps) {
1498                         if (direction > 0)
1499                                 tuner_freq += (current_step * currier_step);
1500                         else
1501                                 tuner_freq -= (current_step * currier_step);
1502
1503                         if (intp->tuner_type[demod] == 3)
1504                                 stv0900_set_tuner_auto(intp, tuner_freq,
1505                                                 intp->bw[demod], demod);
1506                         else
1507                                 stv0900_set_tuner(fe, tuner_freq,
1508                                                 intp->bw[demod]);
1509                 }
1510         }
1511
1512         if (timing_lck == FALSE)
1513                 coarse_srate = 0;
1514         else
1515                 coarse_srate = stv0900_get_symbol_rate(intp, intp->mclk, demod);
1516
1517         return coarse_srate;
1518 }
1519
1520 static u32 stv0900_search_srate_fine(struct dvb_frontend *fe)
1521 {
1522         struct stv0900_state *state = fe->demodulator_priv;
1523         struct stv0900_internal *intp = state->internal;
1524         enum fe_stv0900_demod_num demod = state->demod;
1525         u32     coarse_srate,
1526                 coarse_freq,
1527                 symb,
1528                 symbmax,
1529                 symbmin,
1530                 symbcomp;
1531
1532         coarse_srate = stv0900_get_symbol_rate(intp, intp->mclk, demod);
1533
1534         if (coarse_srate > 3000000) {
1535                 symbmax = 13 * (coarse_srate / 10);
1536                 symbmax = (symbmax / 1000) * 65536;
1537                 symbmax /= (intp->mclk / 1000);
1538
1539                 symbmin = 10 * (coarse_srate / 13);
1540                 symbmin = (symbmin / 1000)*65536;
1541                 symbmin /= (intp->mclk / 1000);
1542
1543                 symb = (coarse_srate / 1000) * 65536;
1544                 symb /= (intp->mclk / 1000);
1545         } else {
1546                 symbmax = 13 * (coarse_srate / 10);
1547                 symbmax = (symbmax / 100) * 65536;
1548                 symbmax /= (intp->mclk / 100);
1549
1550                 symbmin = 10 * (coarse_srate / 14);
1551                 symbmin = (symbmin / 100) * 65536;
1552                 symbmin /= (intp->mclk / 100);
1553
1554                 symb = (coarse_srate / 100) * 65536;
1555                 symb /= (intp->mclk / 100);
1556         }
1557
1558         symbcomp = 13 * (coarse_srate / 10);
1559                 coarse_freq = (stv0900_read_reg(intp, CFR2) << 8)
1560                                         | stv0900_read_reg(intp, CFR1);
1561
1562         if (symbcomp < intp->symbol_rate[demod])
1563                 coarse_srate = 0;
1564         else {
1565                 stv0900_write_reg(intp, DMDISTATE, 0x1f);
1566                 stv0900_write_reg(intp, TMGCFG2, 0xc1);
1567                 stv0900_write_reg(intp, TMGTHRISE, 0x20);
1568                 stv0900_write_reg(intp, TMGTHFALL, 0x00);
1569                 stv0900_write_reg(intp, TMGCFG, 0xd2);
1570                 stv0900_write_bits(intp, CFR_AUTOSCAN, 0);
1571                 stv0900_write_reg(intp, AGC2REF, 0x38);
1572
1573                 if (intp->chip_id >= 0x30)
1574                         stv0900_write_reg(intp, CARFREQ, 0x79);
1575                 else if (intp->chip_id >= 0x20)
1576                         stv0900_write_reg(intp, CARFREQ, 0x49);
1577                 else
1578                         stv0900_write_reg(intp, CARFREQ, 0xed);
1579
1580                 stv0900_write_reg(intp, SFRUP1, (symbmax >> 8) & 0x7f);
1581                 stv0900_write_reg(intp, SFRUP0, (symbmax & 0xff));
1582
1583                 stv0900_write_reg(intp, SFRLOW1, (symbmin >> 8) & 0x7f);
1584                 stv0900_write_reg(intp, SFRLOW0, (symbmin & 0xff));
1585
1586                 stv0900_write_reg(intp, SFRINIT1, (symb >> 8) & 0xff);
1587                 stv0900_write_reg(intp, SFRINIT0, (symb & 0xff));
1588
1589                 stv0900_write_reg(intp, DMDT0M, 0x20);
1590                 stv0900_write_reg(intp, CFRINIT1, (coarse_freq >> 8) & 0xff);
1591                 stv0900_write_reg(intp, CFRINIT0, coarse_freq  & 0xff);
1592                 stv0900_write_reg(intp, DMDISTATE, 0x15);
1593         }
1594
1595         return coarse_srate;
1596 }
1597
1598 static int stv0900_blind_search_algo(struct dvb_frontend *fe)
1599 {
1600         struct stv0900_state *state = fe->demodulator_priv;
1601         struct stv0900_internal *intp = state->internal;
1602         enum fe_stv0900_demod_num demod = state->demod;
1603         u8      k_ref_tmg,
1604                 k_ref_tmg_max,
1605                 k_ref_tmg_min;
1606         u32     coarse_srate,
1607                 agc2_th;
1608         int     lock = FALSE,
1609                 coarse_fail = FALSE;
1610         s32     demod_timeout = 500,
1611                 fec_timeout = 50,
1612                 fail_cpt,
1613                 i,
1614                 agc2_overflow;
1615         u16     agc2_int;
1616         u8      dstatus2;
1617
1618         dprintk("%s\n", __func__);
1619
1620         if (intp->chip_id < 0x20) {
1621                 k_ref_tmg_max = 233;
1622                 k_ref_tmg_min = 143;
1623         } else {
1624                 k_ref_tmg_max = 110;
1625                 k_ref_tmg_min = 10;
1626         }
1627
1628         if (intp->chip_id <= 0x20)
1629                 agc2_th = STV0900_BLIND_SEARCH_AGC2_TH;
1630         else
1631                 agc2_th = STV0900_BLIND_SEARCH_AGC2_TH_CUT30;
1632
1633         agc2_int = stv0900_blind_check_agc2_min_level(intp, demod);
1634
1635         dprintk("%s agc2_int=%d agc2_th=%d \n", __func__, agc2_int, agc2_th);
1636         if (agc2_int > agc2_th)
1637                 return FALSE;
1638
1639         if (intp->chip_id == 0x10)
1640                 stv0900_write_reg(intp, CORRELEXP, 0xaa);
1641
1642         if (intp->chip_id < 0x20)
1643                 stv0900_write_reg(intp, CARHDR, 0x55);
1644         else
1645                 stv0900_write_reg(intp, CARHDR, 0x20);
1646
1647         if (intp->chip_id <= 0x20)
1648                 stv0900_write_reg(intp, CARCFG, 0xc4);
1649         else
1650                 stv0900_write_reg(intp, CARCFG, 0x6);
1651
1652         stv0900_write_reg(intp, RTCS2, 0x44);
1653
1654         if (intp->chip_id >= 0x20) {
1655                 stv0900_write_reg(intp, EQUALCFG, 0x41);
1656                 stv0900_write_reg(intp, FFECFG, 0x41);
1657                 stv0900_write_reg(intp, VITSCALE, 0x82);
1658                 stv0900_write_reg(intp, VAVSRVIT, 0x0);
1659         }
1660
1661         k_ref_tmg = k_ref_tmg_max;
1662
1663         do {
1664                 stv0900_write_reg(intp, KREFTMG, k_ref_tmg);
1665                 if (stv0900_search_srate_coarse(fe) != 0) {
1666                         coarse_srate = stv0900_search_srate_fine(fe);
1667
1668                         if (coarse_srate != 0) {
1669                                 stv0900_get_lock_timeout(&demod_timeout,
1670                                                         &fec_timeout,
1671                                                         coarse_srate,
1672                                                         STV0900_BLIND_SEARCH);
1673                                 lock = stv0900_get_demod_lock(intp,
1674                                                         demod,
1675                                                         demod_timeout);
1676                         } else
1677                                 lock = FALSE;
1678                 } else {
1679                         fail_cpt = 0;
1680                         agc2_overflow = 0;
1681
1682                         for (i = 0; i < 10; i++) {
1683                                 agc2_int = (stv0900_read_reg(intp, AGC2I1) << 8)
1684                                         | stv0900_read_reg(intp, AGC2I0);
1685
1686                                 if (agc2_int >= 0xff00)
1687                                         agc2_overflow++;
1688
1689                                 dstatus2 = stv0900_read_reg(intp, DSTATUS2);
1690
1691                                 if (((dstatus2 & 0x1) == 0x1) &&
1692                                                 ((dstatus2 >> 7) == 1))
1693                                         fail_cpt++;
1694                         }
1695
1696                         if ((fail_cpt > 7) || (agc2_overflow > 7))
1697                                 coarse_fail = TRUE;
1698
1699                         lock = FALSE;
1700                 }
1701                 k_ref_tmg -= 30;
1702         } while ((k_ref_tmg >= k_ref_tmg_min) &&
1703                                 (lock == FALSE) &&
1704                                 (coarse_fail == FALSE));
1705
1706         return lock;
1707 }
1708
1709 static void stv0900_set_viterbi_acq(struct stv0900_internal *intp,
1710                                         enum fe_stv0900_demod_num demod)
1711 {
1712         s32 vth_reg = VTH12;
1713
1714         dprintk("%s\n", __func__);
1715
1716         stv0900_write_reg(intp, vth_reg++, 0x96);
1717         stv0900_write_reg(intp, vth_reg++, 0x64);
1718         stv0900_write_reg(intp, vth_reg++, 0x36);
1719         stv0900_write_reg(intp, vth_reg++, 0x23);
1720         stv0900_write_reg(intp, vth_reg++, 0x1e);
1721         stv0900_write_reg(intp, vth_reg++, 0x19);
1722 }
1723
1724 static void stv0900_set_search_standard(struct stv0900_internal *intp,
1725                                         enum fe_stv0900_demod_num demod)
1726 {
1727
1728         dprintk("%s\n", __func__);
1729
1730         switch (intp->srch_standard[demod]) {
1731         case STV0900_SEARCH_DVBS1:
1732                 dprintk("Search Standard = DVBS1\n");
1733                 break;
1734         case STV0900_SEARCH_DSS:
1735                 dprintk("Search Standard = DSS\n");
1736                 break;
1737         case STV0900_SEARCH_DVBS2:
1738                 dprintk("Search Standard = DVBS2\n");
1739                 break;
1740         case STV0900_AUTO_SEARCH:
1741         default:
1742                 dprintk("Search Standard = AUTO\n");
1743                 break;
1744         }
1745
1746         switch (intp->srch_standard[demod]) {
1747         case STV0900_SEARCH_DVBS1:
1748         case STV0900_SEARCH_DSS:
1749                 stv0900_write_bits(intp, DVBS1_ENABLE, 1);
1750                 stv0900_write_bits(intp, DVBS2_ENABLE, 0);
1751                 stv0900_write_bits(intp, STOP_CLKVIT, 0);
1752                 stv0900_set_dvbs1_track_car_loop(intp,
1753                                                 demod,
1754                                                 intp->symbol_rate[demod]);
1755                 stv0900_write_reg(intp, CAR2CFG, 0x22);
1756
1757                 stv0900_set_viterbi_acq(intp, demod);
1758                 stv0900_set_viterbi_standard(intp,
1759                                         intp->srch_standard[demod],
1760                                         intp->fec[demod], demod);
1761
1762                 break;
1763         case STV0900_SEARCH_DVBS2:
1764                 stv0900_write_bits(intp, DVBS1_ENABLE, 0);
1765                 stv0900_write_bits(intp, DVBS2_ENABLE, 1);
1766                 stv0900_write_bits(intp, STOP_CLKVIT, 1);
1767                 stv0900_write_reg(intp, ACLC, 0x1a);
1768                 stv0900_write_reg(intp, BCLC, 0x09);
1769                 if (intp->chip_id <= 0x20) /*cut 1.x and 2.0*/
1770                         stv0900_write_reg(intp, CAR2CFG, 0x26);
1771                 else
1772                         stv0900_write_reg(intp, CAR2CFG, 0x66);
1773
1774                 if (intp->demod_mode != STV0900_SINGLE) {
1775                         if (intp->chip_id <= 0x11)
1776                                 stv0900_stop_all_s2_modcod(intp, demod);
1777                         else
1778                                 stv0900_activate_s2_modcod(intp, demod);
1779
1780                 } else
1781                         stv0900_activate_s2_modcod_single(intp, demod);
1782
1783                 stv0900_set_viterbi_tracq(intp, demod);
1784
1785                 break;
1786         case STV0900_AUTO_SEARCH:
1787         default:
1788                 stv0900_write_bits(intp, DVBS1_ENABLE, 1);
1789                 stv0900_write_bits(intp, DVBS2_ENABLE, 1);
1790                 stv0900_write_bits(intp, STOP_CLKVIT, 0);
1791                 stv0900_write_reg(intp, ACLC, 0x1a);
1792                 stv0900_write_reg(intp, BCLC, 0x09);
1793                 stv0900_set_dvbs1_track_car_loop(intp,
1794                                                 demod,
1795                                                 intp->symbol_rate[demod]);
1796                 if (intp->chip_id <= 0x20) /*cut 1.x and 2.0*/
1797                         stv0900_write_reg(intp, CAR2CFG, 0x26);
1798                 else
1799                         stv0900_write_reg(intp, CAR2CFG, 0x66);
1800
1801                 if (intp->demod_mode != STV0900_SINGLE) {
1802                         if (intp->chip_id <= 0x11)
1803                                 stv0900_stop_all_s2_modcod(intp, demod);
1804                         else
1805                                 stv0900_activate_s2_modcod(intp, demod);
1806
1807                 } else
1808                         stv0900_activate_s2_modcod_single(intp, demod);
1809
1810                 stv0900_set_viterbi_tracq(intp, demod);
1811                 stv0900_set_viterbi_standard(intp,
1812                                                 intp->srch_standard[demod],
1813                                                 intp->fec[demod], demod);
1814
1815                 break;
1816         }
1817 }
1818
1819 enum fe_stv0900_signal_type stv0900_algo(struct dvb_frontend *fe)
1820 {
1821         struct stv0900_state *state = fe->demodulator_priv;
1822         struct stv0900_internal *intp = state->internal;
1823         enum fe_stv0900_demod_num demod = state->demod;
1824
1825         s32 demod_timeout = 500, fec_timeout = 50;
1826         s32 aq_power, agc1_power, i;
1827
1828         int lock = FALSE, low_sr = FALSE;
1829
1830         enum fe_stv0900_signal_type signal_type = STV0900_NOCARRIER;
1831         enum fe_stv0900_search_algo algo;
1832         int no_signal = FALSE;
1833
1834         dprintk("%s\n", __func__);
1835
1836         algo = intp->srch_algo[demod];
1837         stv0900_write_bits(intp, RST_HWARE, 1);
1838         stv0900_write_reg(intp, DMDISTATE, 0x5c);
1839         if (intp->chip_id >= 0x20) {
1840                 if (intp->symbol_rate[demod] > 5000000)
1841                         stv0900_write_reg(intp, CORRELABS, 0x9e);
1842                 else
1843                         stv0900_write_reg(intp, CORRELABS, 0x82);
1844         } else
1845                 stv0900_write_reg(intp, CORRELABS, 0x88);
1846
1847         stv0900_get_lock_timeout(&demod_timeout, &fec_timeout,
1848                                 intp->symbol_rate[demod],
1849                                 intp->srch_algo[demod]);
1850
1851         if (intp->srch_algo[demod] == STV0900_BLIND_SEARCH) {
1852                 intp->bw[demod] = 2 * 36000000;
1853
1854                 stv0900_write_reg(intp, TMGCFG2, 0xc0);
1855                 stv0900_write_reg(intp, CORRELMANT, 0x70);
1856
1857                 stv0900_set_symbol_rate(intp, intp->mclk, 1000000, demod);
1858         } else {
1859                 stv0900_write_reg(intp, DMDT0M, 0x20);
1860                 stv0900_write_reg(intp, TMGCFG, 0xd2);
1861
1862                 if (intp->symbol_rate[demod] < 2000000)
1863                         stv0900_write_reg(intp, CORRELMANT, 0x63);
1864                 else
1865                         stv0900_write_reg(intp, CORRELMANT, 0x70);
1866
1867                 stv0900_write_reg(intp, AGC2REF, 0x38);
1868
1869                 intp->bw[demod] =
1870                                 stv0900_carrier_width(intp->symbol_rate[demod],
1871                                                                 intp->rolloff);
1872                 if (intp->chip_id >= 0x20) {
1873                         stv0900_write_reg(intp, KREFTMG, 0x5a);
1874
1875                         if (intp->srch_algo[demod] == STV0900_COLD_START) {
1876                                 intp->bw[demod] += 10000000;
1877                                 intp->bw[demod] *= 15;
1878                                 intp->bw[demod] /= 10;
1879                         } else if (intp->srch_algo[demod] == STV0900_WARM_START)
1880                                 intp->bw[demod] += 10000000;
1881
1882                 } else {
1883                         stv0900_write_reg(intp, KREFTMG, 0xc1);
1884                         intp->bw[demod] += 10000000;
1885                         intp->bw[demod] *= 15;
1886                         intp->bw[demod] /= 10;
1887                 }
1888
1889                 stv0900_write_reg(intp, TMGCFG2, 0xc1);
1890
1891                 stv0900_set_symbol_rate(intp, intp->mclk,
1892                                         intp->symbol_rate[demod], demod);
1893                 stv0900_set_max_symbol_rate(intp, intp->mclk,
1894                                         intp->symbol_rate[demod], demod);
1895                 stv0900_set_min_symbol_rate(intp, intp->mclk,
1896                                         intp->symbol_rate[demod], demod);
1897                 if (intp->symbol_rate[demod] >= 10000000)
1898                         low_sr = FALSE;
1899                 else
1900                         low_sr = TRUE;
1901
1902         }
1903
1904         if (intp->tuner_type[demod] == 3)
1905                 stv0900_set_tuner_auto(intp, intp->freq[demod],
1906                                 intp->bw[demod], demod);
1907         else
1908                 stv0900_set_tuner(fe, intp->freq[demod], intp->bw[demod]);
1909
1910         agc1_power = MAKEWORD(stv0900_get_bits(intp, AGCIQ_VALUE1),
1911                                 stv0900_get_bits(intp, AGCIQ_VALUE0));
1912
1913         aq_power = 0;
1914
1915         if (agc1_power == 0) {
1916                 for (i = 0; i < 5; i++)
1917                         aq_power += (stv0900_get_bits(intp, POWER_I) +
1918                                         stv0900_get_bits(intp, POWER_Q)) / 2;
1919
1920                 aq_power /= 5;
1921         }
1922
1923         if ((agc1_power == 0) && (aq_power < IQPOWER_THRESHOLD)) {
1924                 intp->result[demod].locked = FALSE;
1925                 signal_type = STV0900_NOAGC1;
1926                 dprintk("%s: NO AGC1, POWERI, POWERQ\n", __func__);
1927         } else {
1928                 stv0900_write_bits(intp, SPECINV_CONTROL,
1929                                         intp->srch_iq_inv[demod]);
1930                 if (intp->chip_id <= 0x20) /*cut 2.0*/
1931                         stv0900_write_bits(intp, MANUALSX_ROLLOFF, 1);
1932                 else /*cut 3.0*/
1933                         stv0900_write_bits(intp, MANUALS2_ROLLOFF, 1);
1934
1935                 stv0900_set_search_standard(intp, demod);
1936
1937                 if (intp->srch_algo[demod] != STV0900_BLIND_SEARCH)
1938                         stv0900_start_search(intp, demod);
1939         }
1940
1941         if (signal_type == STV0900_NOAGC1)
1942                 return signal_type;
1943
1944         if (intp->chip_id == 0x12) {
1945                 stv0900_write_bits(intp, RST_HWARE, 0);
1946                 msleep(3);
1947                 stv0900_write_bits(intp, RST_HWARE, 1);
1948                 stv0900_write_bits(intp, RST_HWARE, 0);
1949         }
1950
1951         if (algo == STV0900_BLIND_SEARCH)
1952                 lock = stv0900_blind_search_algo(fe);
1953         else if (algo == STV0900_COLD_START)
1954                 lock = stv0900_get_demod_cold_lock(fe, demod_timeout);
1955         else if (algo == STV0900_WARM_START)
1956                 lock = stv0900_get_demod_lock(intp, demod, demod_timeout);
1957
1958         if ((lock == FALSE) && (algo == STV0900_COLD_START)) {
1959                 if (low_sr == FALSE) {
1960                         if (stv0900_check_timing_lock(intp, demod) == TRUE)
1961                                 lock = stv0900_sw_algo(intp, demod);
1962                 }
1963         }
1964
1965         if (lock == TRUE)
1966                 signal_type = stv0900_get_signal_params(fe);
1967
1968         if ((lock == TRUE) && (signal_type == STV0900_RANGEOK)) {
1969                 stv0900_track_optimization(fe);
1970                 if (intp->chip_id <= 0x11) {
1971                         if ((stv0900_get_standard(fe, 0) ==
1972                                                 STV0900_DVBS1_STANDARD) &&
1973                            (stv0900_get_standard(fe, 1) ==
1974                                                 STV0900_DVBS1_STANDARD)) {
1975                                 msleep(20);
1976                                 stv0900_write_bits(intp, RST_HWARE, 0);
1977                         } else {
1978                                 stv0900_write_bits(intp, RST_HWARE, 0);
1979                                 msleep(3);
1980                                 stv0900_write_bits(intp, RST_HWARE, 1);
1981                                 stv0900_write_bits(intp, RST_HWARE, 0);
1982                         }
1983
1984                 } else if (intp->chip_id >= 0x20) {
1985                         stv0900_write_bits(intp, RST_HWARE, 0);
1986                         msleep(3);
1987                         stv0900_write_bits(intp, RST_HWARE, 1);
1988                         stv0900_write_bits(intp, RST_HWARE, 0);
1989                 }
1990
1991                 if (stv0900_wait_for_lock(intp, demod,
1992                                         fec_timeout, fec_timeout) == TRUE) {
1993                         lock = TRUE;
1994                         intp->result[demod].locked = TRUE;
1995                         if (intp->result[demod].standard ==
1996                                                 STV0900_DVBS2_STANDARD) {
1997                                 stv0900_set_dvbs2_rolloff(intp, demod);
1998                                 stv0900_write_bits(intp, RESET_UPKO_COUNT, 1);
1999                                 stv0900_write_bits(intp, RESET_UPKO_COUNT, 0);
2000                                 stv0900_write_reg(intp, ERRCTRL1, 0x67);
2001                         } else {
2002                                 stv0900_write_reg(intp, ERRCTRL1, 0x75);
2003                         }
2004
2005                         stv0900_write_reg(intp, FBERCPT4, 0);
2006                         stv0900_write_reg(intp, ERRCTRL2, 0xc1);
2007                 } else {
2008                         lock = FALSE;
2009                         signal_type = STV0900_NODATA;
2010                         no_signal = stv0900_check_signal_presence(intp, demod);
2011
2012                                 intp->result[demod].locked = FALSE;
2013                 }
2014         }
2015
2016         if ((signal_type != STV0900_NODATA) || (no_signal != FALSE))
2017                 return signal_type;
2018
2019         if (intp->chip_id > 0x11) {
2020                 intp->result[demod].locked = FALSE;
2021                 return signal_type;
2022         }
2023
2024         if ((stv0900_get_bits(intp, HEADER_MODE) == STV0900_DVBS_FOUND) &&
2025            (intp->srch_iq_inv[demod] <= STV0900_IQ_AUTO_NORMAL_FIRST))
2026                 signal_type = stv0900_dvbs1_acq_workaround(fe);
2027
2028         return signal_type;
2029 }
2030