drivers/media/dvb/frontends/stb0899_algo.c

   1 /*
   2         STB0899 Multistandard Frontend driver
   3         Copyright (C) Manu Abraham (abraham.manu@gmail.com)
   4
   5         Copyright (C) ST Microelectronics
   6
   7         This program is free software; you can redistribute it and/or modify
   8         it under the terms of the GNU General Public License as published by
   9         the Free Software Foundation; either version 2 of the License, or
  10         (at your option) any later version.
  11
  12         This program is distributed in the hope that it will be useful,
  13         but WITHOUT ANY WARRANTY; without even the implied warranty of
  14         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15         GNU General Public License for more details.
  16
  17         You should have received a copy of the GNU General Public License
  18         along with this program; if not, write to the Free Software
  19         Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "stb0899_drv.h"
  23 #include "stb0899_priv.h"
  24 #include "stb0899_reg.h"
  25
  26 inline u32 stb0899_do_div(u64 n, u32 d)
  27 {
  28         /* wrap do_div() for ease of use */
  29
  30         do_div(n, d);
  31         return n;
  32 }
  33
  34 /*
  35  * stb0899_calc_srate
  36  * Compute symbol rate
  37  */
  38 static u32 stb0899_calc_srate(u32 master_clk, u8 *sfr)
  39 {
  40         u64 tmp;
  41
  42         /* srate = (SFR * master_clk) >> 20 */
  43
  44         /* sfr is of size 20 bit, stored with an offset of 4 bit */
  45         tmp = (((u32)sfr[0]) << 16) | (((u32)sfr[1]) << 8) | sfr[2];
  46         tmp &= ~0xf;
  47         tmp *= master_clk;
  48         tmp >>= 24;
  49
  50         return tmp;
  51 }
  52
  53 /*
  54  * stb0899_get_srate
  55  * Get the current symbol rate
  56  */
  57 static u32 stb0899_get_srate(struct stb0899_state *state)
  58 {
  59         struct stb0899_internal *internal = &state->internal;
  60         u8 sfr[3];
  61
  62         stb0899_read_regs(state, STB0899_SFRH, sfr, 3);
  63
  64         return stb0899_calc_srate(internal->master_clk, sfr);
  65 }
  66
  67 /*
  68  * stb0899_set_srate
  69  * Set symbol frequency
  70  * MasterClock: master clock frequency (hz)
  71  * SymbolRate: symbol rate (bauds)
  72  * return symbol frequency
  73  */
  74 static u32 stb0899_set_srate(struct stb0899_state *state, u32 master_clk, u32 srate)
  75 {
  76         u32 tmp;
  77         u8 sfr[3];
  78
  79         dprintk(state->verbose, FE_DEBUG, 1, "-->");
  80         /*
  81          * in order to have the maximum precision, the symbol rate entered into
  82          * the chip is computed as the closest value of the "true value".
  83          * In this purpose, the symbol rate value is rounded (1 is added on the bit
  84          * below the LSB )
  85          *
  86          * srate = (SFR * master_clk) >> 20
  87          *      <=>
  88          *   SFR = srate << 20 / master_clk
  89          *
  90          * rounded:
  91          *   SFR = (srate << 21 + master_clk) / (2 * master_clk)
  92          *
  93          * stored as 20 bit number with an offset of 4 bit:
  94          *   sfr = SFR << 4;
  95          */
  96
  97         tmp = stb0899_do_div((((u64)srate) << 21) + master_clk, 2 * master_clk);
  98         tmp <<= 4;
  99
 100         sfr[0] = tmp >> 16;
 101         sfr[1] = tmp >>  8;
 102         sfr[2] = tmp;
 103
 104         stb0899_write_regs(state, STB0899_SFRH, sfr, 3);
 105
 106         return srate;
 107 }
 108
 109 /*
 110  * stb0899_calc_derot_time
 111  * Compute the amount of time needed by the derotator to lock
 112  * SymbolRate: Symbol rate
 113  * return: derotator time constant (ms)
 114  */
 115 static long stb0899_calc_derot_time(long srate)
 116 {
 117         if (srate > 0)
 118                 return (100000 / (srate / 1000));
 119         else
 120                 return 0;
 121 }
 122
 123 /*
 124  * stb0899_carr_width
 125  * Compute the width of the carrier
 126  * return: width of carrier (kHz or Mhz)
 127  */
 128 long stb0899_carr_width(struct stb0899_state *state)
 129 {
 130         struct stb0899_internal *internal = &state->internal;
 131
 132         return (internal->srate + (internal->srate * internal->rolloff) / 100);
 133 }
 134
 135 /*
 136  * stb0899_first_subrange
 137  * Compute the first subrange of the search
 138  */
 139 static void stb0899_first_subrange(struct stb0899_state *state)
 140 {
 141         struct stb0899_internal *internal       = &state->internal;
 142         struct stb0899_params *params           = &state->params;
 143         struct stb0899_config *config           =  state->config;
 144
 145         int range = 0;
 146         u32 bandwidth = 0;
 147
 148         if (config->tuner_get_bandwidth) {
 149                 stb0899_i2c_gate_ctrl(&state->frontend, 1);
 150                 config->tuner_get_bandwidth(&state->frontend, &bandwidth);
 151                 stb0899_i2c_gate_ctrl(&state->frontend, 0);
 152                 range = bandwidth - stb0899_carr_width(state) / 2;
 153         }
 154
 155         if (range > 0)
 156                 internal->sub_range = MIN(internal->srch_range, range);
 157         else
 158                 internal->sub_range = 0;
 159
 160         internal->freq = params->freq;
 161         internal->tuner_offst = 0L;
 162         internal->sub_dir = 1;
 163 }
 164
 165 /*
 166  * stb0899_check_tmg
 167  * check for timing lock
 168  * internal.Ttiming: time to wait for loop lock
 169  */
 170 static enum stb0899_status stb0899_check_tmg(struct stb0899_state *state)
 171 {
 172         struct stb0899_internal *internal = &state->internal;
 173         int lock;
 174         u8 reg;
 175         s8 timing;
 176
 177         msleep(internal->t_derot);
 178
 179         stb0899_write_reg(state, STB0899_RTF, 0xf2);
 180         reg = stb0899_read_reg(state, STB0899_TLIR);
 181         lock = STB0899_GETFIELD(TLIR_TMG_LOCK_IND, reg);
 182         timing = stb0899_read_reg(state, STB0899_RTF);
 183
 184         if (lock >= 42) {
 185                 if ((lock > 48) && (ABS(timing) >= 110)) {
 186                         internal->status = ANALOGCARRIER;
 187                         dprintk(state->verbose, FE_DEBUG, 1, "-->ANALOG Carrier !");
 188                 } else {
 189                         internal->status = TIMINGOK;
 190                         dprintk(state->verbose, FE_DEBUG, 1, "------->TIMING OK !");
 191                 }
 192         } else {
 193                 internal->status = NOTIMING;
 194                 dprintk(state->verbose, FE_DEBUG, 1, "-->NO TIMING !");
 195         }
 196         return internal->status;
 197 }
 198
 199 /*
 200  * stb0899_search_tmg
 201  * perform a fs/2 zig-zag to find timing
 202  */
 203 static enum stb0899_status stb0899_search_tmg(struct stb0899_state *state)
 204 {
 205         struct stb0899_internal *internal = &state->internal;
 206         struct stb0899_params *params = &state->params;
 207
 208         short int derot_step, derot_freq = 0, derot_limit, next_loop = 3;
 209         int index = 0;
 210         u8 cfr[2];
 211
 212         internal->status = NOTIMING;
 213
 214         /* timing loop computation & symbol rate optimisation   */
 215         derot_limit = (internal->sub_range / 2L) / internal->mclk;
 216         derot_step = (params->srate / 2L) / internal->mclk;
 217
 218         while ((stb0899_check_tmg(state) != TIMINGOK) && next_loop) {
 219                 index++;
 220                 derot_freq += index * internal->direction * derot_step; /* next derot zig zag position  */
 221
 222                 if (ABS(derot_freq) > derot_limit)
 223                         next_loop--;
 224
 225                 if (next_loop) {
 226                         STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(state->config->inversion * derot_freq));
 227                         STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(state->config->inversion * derot_freq));
 228                         stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency         */
 229                 }
 230                 internal->direction = -internal->direction;     /* Change zigzag direction              */
 231         }
 232
 233         if (internal->status == TIMINGOK) {
 234                 stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency              */
 235                 internal->derot_freq = state->config->inversion * MAKEWORD16(cfr[0], cfr[1]);
 236                 dprintk(state->verbose, FE_DEBUG, 1, "------->TIMING OK ! Derot Freq = %d", internal->derot_freq);
 237         }
 238
 239         return internal->status;
 240 }
 241
 242 /*
 243  * stb0899_check_carrier
 244  * Check for carrier found
 245  */
 246 static enum stb0899_status stb0899_check_carrier(struct stb0899_state *state)
 247 {
 248         struct stb0899_internal *internal = &state->internal;
 249         u8 reg;
 250
 251         msleep(internal->t_derot); /* wait for derotator ok     */
 252
 253         reg = stb0899_read_reg(state, STB0899_CFD);
 254         STB0899_SETFIELD_VAL(CFD_ON, reg, 1);
 255         stb0899_write_reg(state, STB0899_CFD, reg);
 256
 257         reg = stb0899_read_reg(state, STB0899_DSTATUS);
 258         dprintk(state->verbose, FE_DEBUG, 1, "--------------------> STB0899_DSTATUS=[0x%02x]", reg);
 259         if (STB0899_GETFIELD(CARRIER_FOUND, reg)) {
 260                 internal->status = CARRIEROK;
 261                 dprintk(state->verbose, FE_DEBUG, 1, "-------------> CARRIEROK !");
 262         } else {
 263                 internal->status = NOCARRIER;
 264                 dprintk(state->verbose, FE_DEBUG, 1, "-------------> NOCARRIER !");
 265         }
 266
 267         return internal->status;
 268 }
 269
 270 /*
 271  * stb0899_search_carrier
 272  * Search for a QPSK carrier with the derotator
 273  */
 274 static enum stb0899_status stb0899_search_carrier(struct stb0899_state *state)
 275 {
 276         struct stb0899_internal *internal = &state->internal;
 277
 278         short int derot_freq = 0, last_derot_freq = 0, derot_limit, next_loop = 3;
 279         int index = 0;
 280         u8 cfr[2];
 281         u8 reg;
 282
 283         internal->status = NOCARRIER;
 284         derot_limit = (internal->sub_range / 2L) / internal->mclk;
 285         derot_freq = internal->derot_freq;
 286
 287         reg = stb0899_read_reg(state, STB0899_CFD);
 288         STB0899_SETFIELD_VAL(CFD_ON, reg, 1);
 289         stb0899_write_reg(state, STB0899_CFD, reg);
 290
 291         do {
 292                 dprintk(state->verbose, FE_DEBUG, 1, "Derot Freq=%d, mclk=%d", derot_freq, internal->mclk);
 293                 if (stb0899_check_carrier(state) == NOCARRIER) {
 294                         index++;
 295                         last_derot_freq = derot_freq;
 296                         derot_freq += index * internal->direction * internal->derot_step; /* next zig zag derotator position */
 297
 298                         if(ABS(derot_freq) > derot_limit)
 299                                 next_loop--;
 300
 301                         if (next_loop) {
 302                                 reg = stb0899_read_reg(state, STB0899_CFD);
 303                                 STB0899_SETFIELD_VAL(CFD_ON, reg, 1);
 304                                 stb0899_write_reg(state, STB0899_CFD, reg);
 305
 306                                 STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(state->config->inversion * derot_freq));
 307                                 STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(state->config->inversion * derot_freq));
 308                                 stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */
 309                         }
 310                 }
 311
 312                 internal->direction = -internal->direction; /* Change zigzag direction */
 313         } while ((internal->status != CARRIEROK) && next_loop);
 314
 315         if (internal->status == CARRIEROK) {
 316                 stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */
 317                 internal->derot_freq = state->config->inversion * MAKEWORD16(cfr[0], cfr[1]);
 318                 dprintk(state->verbose, FE_DEBUG, 1, "----> CARRIER OK !, Derot Freq=%d", internal->derot_freq);
 319         } else {
 320                 internal->derot_freq = last_derot_freq;
 321         }
 322
 323         return internal->status;
 324 }
 325
 326 /*
 327  * stb0899_check_data
 328  * Check for data found
 329  */
 330 static enum stb0899_status stb0899_check_data(struct stb0899_state *state)
 331 {
 332         struct stb0899_internal *internal = &state->internal;
 333         struct stb0899_params *params = &state->params;
 334
 335         int lock = 0, index = 0, dataTime = 500, loop;
 336         u8 reg;
 337
 338         internal->status = NODATA;
 339
 340         /* RESET FEC    */
 341         reg = stb0899_read_reg(state, STB0899_TSTRES);
 342         STB0899_SETFIELD_VAL(FRESACS, reg, 1);
 343         stb0899_write_reg(state, STB0899_TSTRES, reg);
 344         msleep(1);
 345         reg = stb0899_read_reg(state, STB0899_TSTRES);
 346         STB0899_SETFIELD_VAL(FRESACS, reg, 0);
 347         stb0899_write_reg(state, STB0899_TSTRES, reg);
 348
 349         if (params->srate <= 2000000)
 350                 dataTime = 2000;
 351         else if (params->srate <= 5000000)
 352                 dataTime = 1500;
 353         else if (params->srate <= 15000000)
 354                 dataTime = 1000;
 355         else
 356                 dataTime = 500;
 357
 358         stb0899_write_reg(state, STB0899_DSTATUS2, 0x00); /* force search loop  */
 359         while (1) {
 360                 /* WARNING! VIT LOCKED has to be tested before VIT_END_LOOOP    */
 361                 reg = stb0899_read_reg(state, STB0899_VSTATUS);
 362                 lock = STB0899_GETFIELD(VSTATUS_LOCKEDVIT, reg);
 363                 loop = STB0899_GETFIELD(VSTATUS_END_LOOPVIT, reg);
 364
 365                 if (lock || loop || (index > dataTime))
 366                         break;
 367                 index++;
 368         }
 369
 370         if (lock) {     /* DATA LOCK indicator  */
 371                 internal->status = DATAOK;
 372                 dprintk(state->verbose, FE_DEBUG, 1, "-----------------> DATA OK !");
 373         }
 374
 375         return internal->status;
 376 }
 377
 378 /*
 379  * stb0899_search_data
 380  * Search for a QPSK carrier with the derotator
 381  */
 382 static enum stb0899_status stb0899_search_data(struct stb0899_state *state)
 383 {
 384         short int derot_freq, derot_step, derot_limit, next_loop = 3;
 385         u8 cfr[2];
 386         u8 reg;
 387         int index = 1;
 388
 389         struct stb0899_internal *internal = &state->internal;
 390         struct stb0899_params *params = &state->params;
 391
 392         derot_step = (params->srate / 4L) / internal->mclk;
 393         derot_limit = (internal->sub_range / 2L) / internal->mclk;
 394         derot_freq = internal->derot_freq;
 395
 396         do {
 397                 if ((internal->status != CARRIEROK) || (stb0899_check_data(state) != DATAOK)) {
 398
 399                         derot_freq += index * internal->direction * derot_step; /* next zig zag derotator position */
 400                         if (ABS(derot_freq) > derot_limit)
 401                                 next_loop--;
 402
 403                         if (next_loop) {
 404                                 dprintk(state->verbose, FE_DEBUG, 1, "Derot freq=%d, mclk=%d", derot_freq, internal->mclk);
 405                                 reg = stb0899_read_reg(state, STB0899_CFD);
 406                                 STB0899_SETFIELD_VAL(CFD_ON, reg, 1);
 407                                 stb0899_write_reg(state, STB0899_CFD, reg);
 408
 409                                 STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(state->config->inversion * derot_freq));
 410                                 STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(state->config->inversion * derot_freq));
 411                                 stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */
 412
 413                                 stb0899_check_carrier(state);
 414                                 index++;
 415                         }
 416                 }
 417                 internal->direction = -internal->direction; /* change zig zag direction */
 418         } while ((internal->status != DATAOK) && next_loop);
 419
 420         if (internal->status == DATAOK) {
 421                 stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */
 422                 internal->derot_freq = state->config->inversion * MAKEWORD16(cfr[0], cfr[1]);
 423                 dprintk(state->verbose, FE_DEBUG, 1, "------> DATAOK ! Derot Freq=%d", internal->derot_freq);
 424         }
 425
 426         return internal->status;
 427 }
 428
 429 /*
 430  * stb0899_check_range
 431  * check if the found frequency is in the correct range
 432  */
 433 static enum stb0899_status stb0899_check_range(struct stb0899_state *state)
 434 {
 435         struct stb0899_internal *internal = &state->internal;
 436         struct stb0899_params *params = &state->params;
 437
 438         int range_offst, tp_freq;
 439
 440         range_offst = internal->srch_range / 2000;
 441         tp_freq = internal->freq + (internal->derot_freq * internal->mclk) / 1000;
 442
 443         if ((tp_freq >= params->freq - range_offst) && (tp_freq <= params->freq + range_offst)) {
 444                 internal->status = RANGEOK;
 445                 dprintk(state->verbose, FE_DEBUG, 1, "----> RANGEOK !");
 446         } else {
 447                 internal->status = OUTOFRANGE;
 448                 dprintk(state->verbose, FE_DEBUG, 1, "----> OUT OF RANGE !");
 449         }
 450
 451         return internal->status;
 452 }
 453
 454 /*
 455  * NextSubRange
 456  * Compute the next subrange of the search
 457  */
 458 static void next_sub_range(struct stb0899_state *state)
 459 {
 460         struct stb0899_internal *internal = &state->internal;
 461         struct stb0899_params *params = &state->params;
 462
 463         long old_sub_range;
 464
 465         if (internal->sub_dir > 0) {
 466                 old_sub_range = internal->sub_range;
 467                 internal->sub_range = MIN((internal->srch_range / 2) -
 468                                           (internal->tuner_offst + internal->sub_range / 2),
 469                                            internal->sub_range);
 470
 471                 if (internal->sub_range < 0)
 472                         internal->sub_range = 0;
 473
 474                 internal->tuner_offst += (old_sub_range + internal->sub_range) / 2;
 475         }
 476
 477         internal->freq = params->freq + (internal->sub_dir * internal->tuner_offst) / 1000;
 478         internal->sub_dir = -internal->sub_dir;
 479 }
 480
 481 /*
 482  * stb0899_dvbs_algo
 483  * Search for a signal, timing, carrier and data for a
 484  * given frequency in a given range
 485  */
 486 enum stb0899_status stb0899_dvbs_algo(struct stb0899_state *state)
 487 {
 488         struct stb0899_params *params           = &state->params;
 489         struct stb0899_internal *internal       = &state->internal;
 490         struct stb0899_config *config           = state->config;
 491
 492         u8 bclc, reg;
 493         u8 cfr[2];
 494         u8 eq_const[10];
 495         s32 clnI = 3;
 496         u32 bandwidth = 0;
 497
 498         /* BETA values rated @ 99MHz    */
 499         s32 betaTab[5][4] = {
 500                /*  5   10   20   30MBps */
 501                 { 37,  34,  32,  31 }, /* QPSK 1/2      */
 502                 { 37,  35,  33,  31 }, /* QPSK 2/3      */
 503                 { 37,  35,  33,  31 }, /* QPSK 3/4      */
 504                 { 37,  36,  33,  32 }, /* QPSK 5/6      */
 505                 { 37,  36,  33,  32 }  /* QPSK 7/8      */
 506         };
 507
 508         internal->direction = 1;
 509
 510         stb0899_set_srate(state, internal->master_clk, params->srate);
 511         /* Carrier loop optimization versus symbol rate for acquisition*/
 512         if (params->srate <= 5000000) {
 513                 stb0899_write_reg(state, STB0899_ACLC, 0x89);
 514                 bclc = stb0899_read_reg(state, STB0899_BCLC);
 515                 STB0899_SETFIELD_VAL(BETA, bclc, 0x1c);
 516                 stb0899_write_reg(state, STB0899_BCLC, bclc);
 517                 clnI = 0;
 518         } else if (params->srate <= 15000000) {
 519                 stb0899_write_reg(state, STB0899_ACLC, 0xc9);
 520                 bclc = stb0899_read_reg(state, STB0899_BCLC);
 521                 STB0899_SETFIELD_VAL(BETA, bclc, 0x22);
 522                 stb0899_write_reg(state, STB0899_BCLC, bclc);
 523                 clnI = 1;
 524         } else if(params->srate <= 25000000) {
 525                 stb0899_write_reg(state, STB0899_ACLC, 0x89);
 526                 bclc = stb0899_read_reg(state, STB0899_BCLC);
 527                 STB0899_SETFIELD_VAL(BETA, bclc, 0x27);
 528                 stb0899_write_reg(state, STB0899_BCLC, bclc);
 529                 clnI = 2;
 530         } else {
 531                 stb0899_write_reg(state, STB0899_ACLC, 0xc8);
 532                 bclc = stb0899_read_reg(state, STB0899_BCLC);
 533                 STB0899_SETFIELD_VAL(BETA, bclc, 0x29);
 534                 stb0899_write_reg(state, STB0899_BCLC, bclc);
 535                 clnI = 3;
 536         }
 537
 538         dprintk(state->verbose, FE_DEBUG, 1, "Set the timing loop to acquisition");
 539         /* Set the timing loop to acquisition   */
 540         stb0899_write_reg(state, STB0899_RTC, 0x46);
 541         stb0899_write_reg(state, STB0899_CFD, 0xee);
 542
 543         /* !! WARNING !!
 544          * Do not read any status variables while acquisition,
 545          * If any needed, read before the acquisition starts
 546          * querying status while acquiring causes the
 547          * acquisition to go bad and hence no locks.
 548          */
 549         dprintk(state->verbose, FE_DEBUG, 1, "Derot Percent=%d Srate=%d mclk=%d",
 550                 internal->derot_percent, params->srate, internal->mclk);
 551
 552         /* Initial calculations */
 553         internal->derot_step = internal->derot_percent * (params->srate / 1000L) / internal->mclk; /* DerotStep/1000 * Fsymbol  */
 554         internal->t_derot = stb0899_calc_derot_time(params->srate);
 555         internal->t_data = 500;
 556
 557         dprintk(state->verbose, FE_DEBUG, 1, "RESET stream merger");
 558         /* RESET Stream merger  */
 559         reg = stb0899_read_reg(state, STB0899_TSTRES);
 560         STB0899_SETFIELD_VAL(FRESRS, reg, 1);
 561         stb0899_write_reg(state, STB0899_TSTRES, reg);
 562
 563         /*
 564          * Set KDIVIDER to an intermediate value between
 565          * 1/2 and 7/8 for acquisition
 566          */
 567         reg = stb0899_read_reg(state, STB0899_DEMAPVIT);
 568         STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 60);
 569         stb0899_write_reg(state, STB0899_DEMAPVIT, reg);
 570
 571         stb0899_write_reg(state, STB0899_EQON, 0x01); /* Equalizer OFF while acquiring */
 572         stb0899_write_reg(state, STB0899_VITSYNC, 0x19);
 573
 574         stb0899_first_subrange(state);
 575         do {
 576                 /* Initialisations */
 577                 cfr[0] = cfr[1] = 0;
 578                 stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* RESET derotator frequency   */
 579
 580                 stb0899_write_reg(state, STB0899_RTF, 0);
 581                 reg = stb0899_read_reg(state, STB0899_CFD);
 582                 STB0899_SETFIELD_VAL(CFD_ON, reg, 1);
 583                 stb0899_write_reg(state, STB0899_CFD, reg);
 584
 585                 internal->derot_freq = 0;
 586                 internal->status = NOAGC1;
 587
 588                 /* enable tuner I/O */
 589                 stb0899_i2c_gate_ctrl(&state->frontend, 1);
 590
 591                 /* Move tuner to frequency */
 592                 dprintk(state->verbose, FE_DEBUG, 1, "Tuner set frequency");
 593                 if (state->config->tuner_set_frequency)
 594                         state->config->tuner_set_frequency(&state->frontend, internal->freq);
 595
 596                 if (state->config->tuner_get_frequency)
 597                         state->config->tuner_get_frequency(&state->frontend, &internal->freq);
 598
 599                 msleep(internal->t_agc1 + internal->t_agc2 + internal->t_derot); /* AGC1, AGC2 and timing loop  */
 600                 dprintk(state->verbose, FE_DEBUG, 1, "current derot freq=%d", internal->derot_freq);
 601                 internal->status = AGC1OK;
 602
 603                 /* There is signal in the band  */
 604                 if (config->tuner_get_bandwidth)
 605                         config->tuner_get_bandwidth(&state->frontend, &bandwidth);
 606
 607                 /* disable tuner I/O */
 608                 stb0899_i2c_gate_ctrl(&state->frontend, 0);
 609
 610                 if (params->srate <= bandwidth / 2)
 611                         stb0899_search_tmg(state); /* For low rates (SCPC)      */
 612                 else
 613                         stb0899_check_tmg(state); /* For high rates (MCPC)      */
 614
 615                 if (internal->status == TIMINGOK) {
 616                         dprintk(state->verbose, FE_DEBUG, 1,
 617                                 "TIMING OK ! Derot freq=%d, mclk=%d",
 618                                 internal->derot_freq, internal->mclk);
 619
 620                         if (stb0899_search_carrier(state) == CARRIEROK) {       /* Search for carrier   */
 621                                 dprintk(state->verbose, FE_DEBUG, 1,
 622                                         "CARRIER OK ! Derot freq=%d, mclk=%d",
 623                                         internal->derot_freq, internal->mclk);
 624
 625                                 if (stb0899_search_data(state) == DATAOK) {     /* Check for data       */
 626                                         dprintk(state->verbose, FE_DEBUG, 1,
 627                                                 "DATA OK ! Derot freq=%d, mclk=%d",
 628                                                 internal->derot_freq, internal->mclk);
 629
 630                                         if (stb0899_check_range(state) == RANGEOK) {
 631                                                 dprintk(state->verbose, FE_DEBUG, 1,
 632                                                         "RANGE OK ! derot freq=%d, mclk=%d",
 633                                                         internal->derot_freq, internal->mclk);
 634
 635                                                 internal->freq = params->freq + ((internal->derot_freq * internal->mclk) / 1000);
 636                                                 reg = stb0899_read_reg(state, STB0899_PLPARM);
 637                                                 internal->fecrate = STB0899_GETFIELD(VITCURPUN, reg);
 638                                                 dprintk(state->verbose, FE_DEBUG, 1,
 639                                                         "freq=%d, internal resultant freq=%d",
 640                                                         params->freq, internal->freq);
 641
 642                                                 dprintk(state->verbose, FE_DEBUG, 1,
 643                                                         "internal puncture rate=%d",
 644                                                         internal->fecrate);
 645                                         }
 646                                 }
 647                         }
 648                 }
 649                 if (internal->status != RANGEOK)
 650                         next_sub_range(state);
 651
 652         } while (internal->sub_range && internal->status != RANGEOK);
 653
 654         /* Set the timing loop to tracking      */
 655         stb0899_write_reg(state, STB0899_RTC, 0x33);
 656         stb0899_write_reg(state, STB0899_CFD, 0xf7);
 657         /* if locked and range ok, set Kdiv     */
 658         if (internal->status == RANGEOK) {
 659                 dprintk(state->verbose, FE_DEBUG, 1, "Locked & Range OK !");
 660                 stb0899_write_reg(state, STB0899_EQON, 0x41);           /* Equalizer OFF while acquiring        */
 661                 stb0899_write_reg(state, STB0899_VITSYNC, 0x39);        /* SN to b'11 for acquisition           */
 662
 663                 /*
 664                  * Carrier loop optimization versus
 665                  * symbol Rate/Puncture Rate for Tracking
 666                  */
 667                 reg = stb0899_read_reg(state, STB0899_BCLC);
 668                 switch (internal->fecrate) {
 669                 case STB0899_FEC_1_2:           /* 13   */
 670                         stb0899_write_reg(state, STB0899_DEMAPVIT, 0x1a);
 671                         STB0899_SETFIELD_VAL(BETA, reg, betaTab[0][clnI]);
 672                         stb0899_write_reg(state, STB0899_BCLC, reg);
 673                         break;
 674                 case STB0899_FEC_2_3:           /* 18   */
 675                         stb0899_write_reg(state, STB0899_DEMAPVIT, 44);
 676                         STB0899_SETFIELD_VAL(BETA, reg, betaTab[1][clnI]);
 677                         stb0899_write_reg(state, STB0899_BCLC, reg);
 678                         break;
 679                 case STB0899_FEC_3_4:           /* 21   */
 680                         stb0899_write_reg(state, STB0899_DEMAPVIT, 60);
 681                         STB0899_SETFIELD_VAL(BETA, reg, betaTab[2][clnI]);
 682                         stb0899_write_reg(state, STB0899_BCLC, reg);
 683                         break;
 684                 case STB0899_FEC_5_6:           /* 24   */
 685                         stb0899_write_reg(state, STB0899_DEMAPVIT, 75);
 686                         STB0899_SETFIELD_VAL(BETA, reg, betaTab[3][clnI]);
 687                         stb0899_write_reg(state, STB0899_BCLC, reg);
 688                         break;
 689                 case STB0899_FEC_6_7:           /* 25   */
 690                         stb0899_write_reg(state, STB0899_DEMAPVIT, 88);
 691                         stb0899_write_reg(state, STB0899_ACLC, 0x88);
 692                         stb0899_write_reg(state, STB0899_BCLC, 0x9a);
 693                         break;
 694                 case STB0899_FEC_7_8:           /* 26   */
 695                         stb0899_write_reg(state, STB0899_DEMAPVIT, 94);
 696                         STB0899_SETFIELD_VAL(BETA, reg, betaTab[4][clnI]);
 697                         stb0899_write_reg(state, STB0899_BCLC, reg);
 698                         break;
 699                 default:
 700                         dprintk(state->verbose, FE_DEBUG, 1, "Unsupported Puncture Rate");
 701                         break;
 702                 }
 703                 /* release stream merger RESET  */
 704                 reg = stb0899_read_reg(state, STB0899_TSTRES);
 705                 STB0899_SETFIELD_VAL(FRESRS, reg, 0);
 706                 stb0899_write_reg(state, STB0899_TSTRES, reg);
 707
 708                 /* disable carrier detector     */
 709                 reg = stb0899_read_reg(state, STB0899_CFD);
 710                 STB0899_SETFIELD_VAL(CFD_ON, reg, 0);
 711                 stb0899_write_reg(state, STB0899_CFD, reg);
 712
 713                 stb0899_read_regs(state, STB0899_EQUAI1, eq_const, 10);
 714         }
 715
 716         return internal->status;
 717 }
 718
 719 /*
 720  * stb0899_dvbs2_config_uwp
 721  * Configure UWP state machine
 722  */
 723 static void stb0899_dvbs2_config_uwp(struct stb0899_state *state)
 724 {
 725         struct stb0899_internal *internal = &state->internal;
 726         struct stb0899_config *config = state->config;
 727         u32 uwp1, uwp2, uwp3, reg;
 728
 729         uwp1 = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_CNTRL1);
 730         uwp2 = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_CNTRL2);
 731         uwp3 = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_CNTRL3);
 732
 733         STB0899_SETFIELD_VAL(UWP_ESN0_AVE, uwp1, config->esno_ave);
 734         STB0899_SETFIELD_VAL(UWP_ESN0_QUANT, uwp1, config->esno_quant);
 735         STB0899_SETFIELD_VAL(UWP_TH_SOF, uwp1, config->uwp_threshold_sof);
 736
 737         STB0899_SETFIELD_VAL(FE_COARSE_TRK, uwp2, internal->av_frame_coarse);
 738         STB0899_SETFIELD_VAL(FE_FINE_TRK, uwp2, internal->av_frame_fine);
 739         STB0899_SETFIELD_VAL(UWP_MISS_TH, uwp2, config->miss_threshold);
 740
 741         STB0899_SETFIELD_VAL(UWP_TH_ACQ, uwp3, config->uwp_threshold_acq);
 742         STB0899_SETFIELD_VAL(UWP_TH_TRACK, uwp3, config->uwp_threshold_track);
 743
 744         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_UWP_CNTRL1, STB0899_OFF0_UWP_CNTRL1, uwp1);
 745         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_UWP_CNTRL2, STB0899_OFF0_UWP_CNTRL2, uwp2);
 746         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_UWP_CNTRL3, STB0899_OFF0_UWP_CNTRL3, uwp3);
 747
 748         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, SOF_SRCH_TO);
 749         STB0899_SETFIELD_VAL(SOF_SEARCH_TIMEOUT, reg, config->sof_search_timeout);
 750         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_SOF_SRCH_TO, STB0899_OFF0_SOF_SRCH_TO, reg);
 751 }
 752
 753 /*
 754  * stb0899_dvbs2_config_csm_auto
 755  * Set CSM to AUTO mode
 756  */
 757 static void stb0899_dvbs2_config_csm_auto(struct stb0899_state *state)
 758 {
 759         u32 reg;
 760
 761         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
 762         STB0899_SETFIELD_VAL(CSM_AUTO_PARAM, reg, 1);
 763         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, reg);
 764 }
 765
 766 static long Log2Int(int number)
 767 {
 768         int i;
 769
 770         i = 0;
 771         while ((1 << i) <= ABS(number))
 772                 i++;
 773
 774         if (number == 0)
 775                 i = 1;
 776
 777         return i - 1;
 778 }
 779
 780 /*
 781  * stb0899_dvbs2_calc_srate
 782  * compute BTR_NOM_FREQ for the symbol rate
 783  */
 784 static u32 stb0899_dvbs2_calc_srate(struct stb0899_state *state)
 785 {
 786         struct stb0899_internal *internal       = &state->internal;
 787         struct stb0899_config *config           = state->config;
 788
 789         u32 dec_ratio, dec_rate, decim, remain, intval, btr_nom_freq;
 790         u32 master_clk, srate;
 791
 792         dec_ratio = (internal->master_clk * 2) / (5 * internal->srate);
 793         dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio;
 794         dec_rate = Log2Int(dec_ratio);
 795         decim = 1 << dec_rate;
 796         master_clk = internal->master_clk / 1000;
 797         srate = internal->srate / 1000;
 798
 799         if (decim <= 4) {
 800                 intval = (decim * (1 << (config->btr_nco_bits - 1))) / master_clk;
 801                 remain = (decim * (1 << (config->btr_nco_bits - 1))) % master_clk;
 802         } else {
 803                 intval = (1 << (config->btr_nco_bits - 1)) / (master_clk / 100) * decim / 100;
 804                 remain = (decim * (1 << (config->btr_nco_bits - 1))) % master_clk;
 805         }
 806         btr_nom_freq = (intval * srate) + ((remain * srate) / master_clk);
 807
 808         return btr_nom_freq;
 809 }
 810
 811 /*
 812  * stb0899_dvbs2_calc_dev
 813  * compute the correction to be applied to symbol rate
 814  */
 815 static u32 stb0899_dvbs2_calc_dev(struct stb0899_state *state)
 816 {
 817         struct stb0899_internal *internal = &state->internal;
 818         u32 dec_ratio, correction, master_clk, srate;
 819
 820         dec_ratio = (internal->master_clk * 2) / (5 * internal->srate);
 821         dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio;
 822
 823         master_clk = internal->master_clk / 1000;       /* for integer Caculation*/
 824         srate = internal->srate / 1000; /* for integer Caculation*/
 825         correction = (512 * master_clk) / (2 * dec_ratio * srate);
 826
 827         return  correction;
 828 }
 829
 830 /*
 831  * stb0899_dvbs2_set_srate
 832  * Set DVBS2 symbol rate
 833  */
 834 static void stb0899_dvbs2_set_srate(struct stb0899_state *state)
 835 {
 836         struct stb0899_internal *internal = &state->internal;
 837
 838         u32 dec_ratio, dec_rate, win_sel, decim, f_sym, btr_nom_freq;
 839         u32 correction, freq_adj, band_lim, decim_cntrl, reg;
 840         u8 anti_alias;
 841
 842         /*set decimation to 1*/
 843         dec_ratio = (internal->master_clk * 2) / (5 * internal->srate);
 844         dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio;
 845         dec_rate = Log2Int(dec_ratio);
 846
 847         win_sel = 0;
 848         if (dec_rate >= 5)
 849                 win_sel = dec_rate - 4;
 850
 851         decim = (1 << dec_rate);
 852         /* (FSamp/Fsymbol *100) for integer Caculation */
 853         f_sym = internal->master_clk / ((decim * internal->srate) / 1000);
 854
 855         if (f_sym <= 2250)      /* don't band limit signal going into btr block*/
 856                 band_lim = 1;
 857         else
 858                 band_lim = 0;   /* band limit signal going into btr block*/
 859
 860         decim_cntrl = ((win_sel << 3) & 0x18) + ((band_lim << 5) & 0x20) + (dec_rate & 0x7);
 861         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_DECIM_CNTRL, STB0899_OFF0_DECIM_CNTRL, decim_cntrl);
 862
 863         if (f_sym <= 3450)
 864                 anti_alias = 0;
 865         else if (f_sym <= 4250)
 866                 anti_alias = 1;
 867         else
 868                 anti_alias = 2;
 869
 870         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_ANTI_ALIAS_SEL, STB0899_OFF0_ANTI_ALIAS_SEL, anti_alias);
 871         btr_nom_freq = stb0899_dvbs2_calc_srate(state);
 872         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_NOM_FREQ, STB0899_OFF0_BTR_NOM_FREQ, btr_nom_freq);
 873
 874         correction = stb0899_dvbs2_calc_dev(state);
 875         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_CNTRL);
 876         STB0899_SETFIELD_VAL(BTR_FREQ_CORR, reg, correction);
 877         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_CNTRL, STB0899_OFF0_BTR_CNTRL, reg);
 878
 879         /* scale UWP+CSM frequency to sample rate*/
 880         freq_adj =  internal->srate / (internal->master_clk / 4096);
 881         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_FREQ_ADJ_SCALE, STB0899_OFF0_FREQ_ADJ_SCALE, freq_adj);
 882 }
 883
 884 /*
 885  * stb0899_dvbs2_set_btr_loopbw
 886  * set bit timing loop bandwidth as a percentage of the symbol rate
 887  */
 888 static void stb0899_dvbs2_set_btr_loopbw(struct stb0899_state *state)
 889 {
 890         struct stb0899_internal *internal       = &state->internal;
 891         struct stb0899_config *config           = state->config;
 892
 893         u32 sym_peak = 23, zeta = 707, loopbw_percent = 60;
 894         s32 dec_ratio, dec_rate, k_btr1_rshft, k_btr1, k_btr0_rshft;
 895         s32 k_btr0, k_btr2_rshft, k_direct_shift, k_indirect_shift;
 896         u32 decim, K, wn, k_direct, k_indirect;
 897         u32 reg;
 898
 899         dec_ratio = (internal->master_clk * 2) / (5 * internal->srate);
 900         dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio;
 901         dec_rate = Log2Int(dec_ratio);
 902         decim = (1 << dec_rate);
 903
 904         sym_peak *= 576000;
 905         K = (1 << config->btr_nco_bits) / (internal->master_clk / 1000);
 906         K *= (internal->srate / 1000000) * decim; /*k=k 10^-8*/
 907
 908         if (K != 0) {
 909                 K = sym_peak / K;
 910                 wn = (4 * zeta * zeta) + 1000000;
 911                 wn = (2 * (loopbw_percent * 1000) * 40 * zeta) /wn;  /*wn =wn 10^-8*/
 912
 913                 k_indirect = (wn * wn) / K;
 914                 k_indirect = k_indirect;          /*kindirect = kindirect 10^-6*/
 915                 k_direct   = (2 * wn * zeta) / K;       /*kDirect = kDirect 10^-2*/
 916                 k_direct  *= 100;
 917
 918                 k_direct_shift = Log2Int(k_direct) - Log2Int(10000) - 2;
 919                 k_btr1_rshft = (-1 * k_direct_shift) + config->btr_gain_shift_offset;
 920                 k_btr1 = k_direct / (1 << k_direct_shift);
 921                 k_btr1 /= 10000;
 922
 923                 k_indirect_shift = Log2Int(k_indirect + 15) - 20 /*- 2*/;
 924                 k_btr0_rshft = (-1 * k_indirect_shift) + config->btr_gain_shift_offset;
 925                 k_btr0 = k_indirect * (1 << (-k_indirect_shift));
 926                 k_btr0 /= 1000000;
 927
 928                 k_btr2_rshft = 0;
 929                 if (k_btr0_rshft > 15) {
 930                         k_btr2_rshft = k_btr0_rshft - 15;
 931                         k_btr0_rshft = 15;
 932                 }
 933                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_LOOP_GAIN);
 934                 STB0899_SETFIELD_VAL(KBTR0_RSHFT, reg, k_btr0_rshft);
 935                 STB0899_SETFIELD_VAL(KBTR0, reg, k_btr0);
 936                 STB0899_SETFIELD_VAL(KBTR1_RSHFT, reg, k_btr1_rshft);
 937                 STB0899_SETFIELD_VAL(KBTR1, reg, k_btr1);
 938                 STB0899_SETFIELD_VAL(KBTR2_RSHFT, reg, k_btr2_rshft);
 939                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_LOOP_GAIN, STB0899_OFF0_BTR_LOOP_GAIN, reg);
 940         } else
 941                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_LOOP_GAIN, STB0899_OFF0_BTR_LOOP_GAIN, 0xc4c4f);
 942 }
 943
 944 /*
 945  * stb0899_dvbs2_set_carr_freq
 946  * set nominal frequency for carrier search
 947  */
 948 static void stb0899_dvbs2_set_carr_freq(struct stb0899_state *state, s32 carr_freq, u32 master_clk)
 949 {
 950         struct stb0899_config *config = state->config;
 951         s32 crl_nom_freq;
 952         u32 reg;
 953
 954         crl_nom_freq = (1 << config->crl_nco_bits) / master_clk;
 955         crl_nom_freq *= carr_freq;
 956         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_NOM_FREQ);
 957         STB0899_SETFIELD_VAL(CRL_NOM_FREQ, reg, crl_nom_freq);
 958         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_NOM_FREQ, STB0899_OFF0_CRL_NOM_FREQ, reg);
 959 }
 960
 961 /*
 962  * stb0899_dvbs2_init_calc
 963  * Initialize DVBS2 UWP, CSM, carrier and timing loops
 964  */
 965 static void stb0899_dvbs2_init_calc(struct stb0899_state *state)
 966 {
 967         struct stb0899_internal *internal = &state->internal;
 968         s32 steps, step_size;
 969         u32 range, reg;
 970
 971         /* config uwp and csm */
 972         stb0899_dvbs2_config_uwp(state);
 973         stb0899_dvbs2_config_csm_auto(state);
 974
 975         /* initialize BTR       */
 976         stb0899_dvbs2_set_srate(state);
 977         stb0899_dvbs2_set_btr_loopbw(state);
 978
 979         if (internal->srate / 1000000 >= 15)
 980                 step_size = (1 << 17) / 5;
 981         else if (internal->srate / 1000000 >= 10)
 982                 step_size = (1 << 17) / 7;
 983         else if (internal->srate / 1000000 >= 5)
 984                 step_size = (1 << 17) / 10;
 985         else
 986                 step_size = (1 << 17) / 4;
 987
 988         range = internal->srch_range / 1000000;
 989         steps = (10 * range * (1 << 17)) / (step_size * (internal->srate / 1000000));
 990         steps = (steps + 6) / 10;
 991         steps = (steps == 0) ? 1 : steps;
 992         if (steps % 2 == 0)
 993                 stb0899_dvbs2_set_carr_freq(state, internal->center_freq -
 994                                            (internal->step_size * (internal->srate / 20000000)),
 995                                            (internal->master_clk) / 1000000);
 996         else
 997                 stb0899_dvbs2_set_carr_freq(state, internal->center_freq, (internal->master_clk) / 1000000);
 998
 999         /*Set Carrier Search params (zigzag, num steps and freq step size*/
1000         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, ACQ_CNTRL2);
1001         STB0899_SETFIELD_VAL(ZIGZAG, reg, 1);
1002         STB0899_SETFIELD_VAL(NUM_STEPS, reg, steps);
1003         STB0899_SETFIELD_VAL(FREQ_STEPSIZE, reg, step_size);
1004         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_ACQ_CNTRL2, STB0899_OFF0_ACQ_CNTRL2, reg);
1005 }
1006
1007 /*
1008  * stb0899_dvbs2_btr_init
1009  * initialize the timing loop
1010  */
1011 static void stb0899_dvbs2_btr_init(struct stb0899_state *state)
1012 {
1013         u32 reg;
1014
1015         /* set enable BTR loopback      */
1016         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_CNTRL);
1017         STB0899_SETFIELD_VAL(INTRP_PHS_SENSE, reg, 1);
1018         STB0899_SETFIELD_VAL(BTR_ERR_ENA, reg, 1);
1019         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_CNTRL, STB0899_OFF0_BTR_CNTRL, reg);
1020
1021         /* fix btr freq accum at 0      */
1022         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_FREQ_INIT, STB0899_OFF0_BTR_FREQ_INIT, 0x10000000);
1023         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_FREQ_INIT, STB0899_OFF0_BTR_FREQ_INIT, 0x00000000);
1024
1025         /* fix btr freq accum at 0      */
1026         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_PHS_INIT, STB0899_OFF0_BTR_PHS_INIT, 0x10000000);
1027         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_PHS_INIT, STB0899_OFF0_BTR_PHS_INIT, 0x00000000);
1028 }
1029
1030 /*
1031  * stb0899_dvbs2_reacquire
1032  * trigger a DVB-S2 acquisition
1033  */
1034 static void stb0899_dvbs2_reacquire(struct stb0899_state *state)
1035 {
1036         u32 reg = 0;
1037
1038         /* demod soft reset     */
1039         STB0899_SETFIELD_VAL(DVBS2_RESET, reg, 1);
1040         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_RESET_CNTRL, STB0899_OFF0_RESET_CNTRL, reg);
1041
1042         /*Reset Timing Loop     */
1043         stb0899_dvbs2_btr_init(state);
1044
1045         /* reset Carrier loop   */
1046         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_FREQ_INIT, STB0899_OFF0_CRL_FREQ_INIT, (1 << 30));
1047         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_FREQ_INIT, STB0899_OFF0_CRL_FREQ_INIT, 0);
1048         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_LOOP_GAIN, STB0899_OFF0_CRL_LOOP_GAIN, 0);
1049         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_PHS_INIT, STB0899_OFF0_CRL_PHS_INIT, (1 << 30));
1050         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_PHS_INIT, STB0899_OFF0_CRL_PHS_INIT, 0);
1051
1052         /*release demod soft reset      */
1053         reg = 0;
1054         STB0899_SETFIELD_VAL(DVBS2_RESET, reg, 0);
1055         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_RESET_CNTRL, STB0899_OFF0_RESET_CNTRL, reg);
1056
1057         /* start acquisition process    */
1058         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_ACQUIRE_TRIG, STB0899_OFF0_ACQUIRE_TRIG, 1);
1059         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_LOCK_LOST, STB0899_OFF0_LOCK_LOST, 0);
1060
1061         /* equalizer Init       */
1062         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQUALIZER_INIT, STB0899_OFF0_EQUALIZER_INIT, 1);
1063
1064         /*Start equilizer       */
1065         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQUALIZER_INIT, STB0899_OFF0_EQUALIZER_INIT, 0);
1066
1067         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, EQ_CNTRL);
1068         STB0899_SETFIELD_VAL(EQ_SHIFT, reg, 0);
1069         STB0899_SETFIELD_VAL(EQ_DISABLE_UPDATE, reg, 0);
1070         STB0899_SETFIELD_VAL(EQ_DELAY, reg, 0x05);
1071         STB0899_SETFIELD_VAL(EQ_ADAPT_MODE, reg, 0x01);
1072         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQ_CNTRL, STB0899_OFF0_EQ_CNTRL, reg);
1073
1074         /* RESET Packet delineator      */
1075         stb0899_write_reg(state, STB0899_PDELCTRL, 0x4a);
1076 }
1077
1078 /*
1079  * stb0899_dvbs2_get_dmd_status
1080  * get DVB-S2 Demod LOCK status
1081  */
1082 static enum stb0899_status stb0899_dvbs2_get_dmd_status(struct stb0899_state *state, int timeout)
1083 {
1084         int time = -10, lock = 0, uwp, csm;
1085         u32 reg;
1086
1087         do {
1088                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_STATUS);
1089                 dprintk(state->verbose, FE_DEBUG, 1, "DMD_STATUS=[0x%02x]", reg);
1090                 if (STB0899_GETFIELD(IF_AGC_LOCK, reg))
1091                         dprintk(state->verbose, FE_DEBUG, 1, "------------->IF AGC LOCKED !");
1092                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_STAT2);
1093                 dprintk(state->verbose, FE_DEBUG, 1, "----------->DMD STAT2=[0x%02x]", reg);
1094                 uwp = STB0899_GETFIELD(UWP_LOCK, reg);
1095                 csm = STB0899_GETFIELD(CSM_LOCK, reg);
1096                 if (uwp && csm)
1097                         lock = 1;
1098
1099                 time += 10;
1100                 msleep(10);
1101
1102         } while ((!lock) && (time <= timeout));
1103
1104         if (lock) {
1105                 dprintk(state->verbose, FE_DEBUG, 1, "----------------> DVB-S2 LOCK !");
1106                 return DVBS2_DEMOD_LOCK;
1107         } else {
1108                 return DVBS2_DEMOD_NOLOCK;
1109         }
1110 }
1111
1112 /*
1113  * stb0899_dvbs2_get_data_lock
1114  * get FEC status
1115  */
1116 static int stb0899_dvbs2_get_data_lock(struct stb0899_state *state, int timeout)
1117 {
1118         int time = 0, lock = 0;
1119         u8 reg;
1120
1121         while ((!lock) && (time < timeout)) {
1122                 reg = stb0899_read_reg(state, STB0899_CFGPDELSTATUS1);
1123                 dprintk(state->verbose, FE_DEBUG, 1, "---------> CFGPDELSTATUS=[0x%02x]", reg);
1124                 lock = STB0899_GETFIELD(CFGPDELSTATUS_LOCK, reg);
1125                 time++;
1126         }
1127
1128         return lock;
1129 }
1130
1131 /*
1132  * stb0899_dvbs2_get_fec_status
1133  * get DVB-S2 FEC LOCK status
1134  */
1135 static enum stb0899_status stb0899_dvbs2_get_fec_status(struct stb0899_state *state, int timeout)
1136 {
1137         int time = 0, Locked;
1138
1139         do {
1140                 Locked = stb0899_dvbs2_get_data_lock(state, 1);
1141                 time++;
1142                 msleep(1);
1143
1144         } while ((!Locked) && (time < timeout));
1145
1146         if (Locked) {
1147                 dprintk(state->verbose, FE_DEBUG, 1, "---------->DVB-S2 FEC LOCK !");
1148                 return DVBS2_FEC_LOCK;
1149         } else {
1150                 return DVBS2_FEC_NOLOCK;
1151         }
1152 }
1153
1154
1155 /*
1156  * stb0899_dvbs2_init_csm
1157  * set parameters for manual mode
1158  */
1159 static void stb0899_dvbs2_init_csm(struct stb0899_state *state, int pilots, enum stb0899_modcod modcod)
1160 {
1161         struct stb0899_internal *internal = &state->internal;
1162
1163         s32 dvt_tbl = 1, two_pass = 0, agc_gain = 6, agc_shift = 0, loop_shift = 0, phs_diff_thr = 0x80;
1164         s32 gamma_acq, gamma_rho_acq, gamma_trk, gamma_rho_trk, lock_count_thr;
1165         u32 csm1, csm2, csm3, csm4;
1166
1167         if (((internal->master_clk / internal->srate) <= 4) && (modcod <= 11) && (pilots == 1)) {
1168                 switch (modcod) {
1169                 case STB0899_QPSK_12:
1170                         gamma_acq               = 25;
1171                         gamma_rho_acq           = 2700;
1172                         gamma_trk               = 12;
1173                         gamma_rho_trk           = 180;
1174                         lock_count_thr          = 8;
1175                         break;
1176                 case STB0899_QPSK_35:
1177                         gamma_acq               = 38;
1178                         gamma_rho_acq           = 7182;
1179                         gamma_trk               = 14;
1180                         gamma_rho_trk           = 308;
1181                         lock_count_thr          = 8;
1182                         break;
1183                 case STB0899_QPSK_23:
1184                         gamma_acq               = 42;
1185                         gamma_rho_acq           = 9408;
1186                         gamma_trk               = 17;
1187                         gamma_rho_trk           = 476;
1188                         lock_count_thr          = 8;
1189                         break;
1190                 case STB0899_QPSK_34:
1191                         gamma_acq               = 53;
1192                         gamma_rho_acq           = 16642;
1193                         gamma_trk               = 19;
1194                         gamma_rho_trk           = 646;
1195                         lock_count_thr          = 8;
1196                         break;
1197                 case STB0899_QPSK_45:
1198                         gamma_acq               = 53;
1199                         gamma_rho_acq           = 17119;
1200                         gamma_trk               = 22;
1201                         gamma_rho_trk           = 880;
1202                         lock_count_thr          = 8;
1203                         break;
1204                 case STB0899_QPSK_56:
1205                         gamma_acq               = 55;
1206                         gamma_rho_acq           = 19250;
1207                         gamma_trk               = 23;
1208                         gamma_rho_trk           = 989;
1209                         lock_count_thr          = 8;
1210                         break;
1211                 case STB0899_QPSK_89:
1212                         gamma_acq               = 60;
1213                         gamma_rho_acq           = 24240;
1214                         gamma_trk               = 24;
1215                         gamma_rho_trk           = 1176;
1216                         lock_count_thr          = 8;
1217                         break;
1218                 case STB0899_QPSK_910:
1219                         gamma_acq               = 66;
1220                         gamma_rho_acq           = 29634;
1221                         gamma_trk               = 24;
1222                         gamma_rho_trk           = 1176;
1223                         lock_count_thr          = 8;
1224                         break;
1225                 default:
1226                         gamma_acq               = 66;
1227                         gamma_rho_acq           = 29634;
1228                         gamma_trk               = 24;
1229                         gamma_rho_trk           = 1176;
1230                         lock_count_thr          = 8;
1231                         break;
1232                 }
1233
1234                 csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
1235                 STB0899_SETFIELD_VAL(CSM_AUTO_PARAM, csm1, 0);
1236                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
1237
1238                 csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
1239                 csm2 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL2);
1240                 csm3 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL3);
1241                 csm4 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL4);
1242
1243                 STB0899_SETFIELD_VAL(CSM_DVT_TABLE, csm1, dvt_tbl);
1244                 STB0899_SETFIELD_VAL(CSM_TWO_PASS, csm1, two_pass);
1245                 STB0899_SETFIELD_VAL(CSM_AGC_GAIN, csm1, agc_gain);
1246                 STB0899_SETFIELD_VAL(CSM_AGC_SHIFT, csm1, agc_shift);
1247                 STB0899_SETFIELD_VAL(FE_LOOP_SHIFT, csm1, loop_shift);
1248                 STB0899_SETFIELD_VAL(CSM_GAMMA_ACQ, csm2, gamma_acq);
1249                 STB0899_SETFIELD_VAL(CSM_GAMMA_RHOACQ, csm2, gamma_rho_acq);
1250                 STB0899_SETFIELD_VAL(CSM_GAMMA_TRACK, csm3, gamma_trk);
1251                 STB0899_SETFIELD_VAL(CSM_GAMMA_RHOTRACK, csm3, gamma_rho_trk);
1252                 STB0899_SETFIELD_VAL(CSM_LOCKCOUNT_THRESH, csm4, lock_count_thr);
1253                 STB0899_SETFIELD_VAL(CSM_PHASEDIFF_THRESH, csm4, phs_diff_thr);
1254
1255                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
1256                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL2, STB0899_OFF0_CSM_CNTRL2, csm2);
1257                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL3, STB0899_OFF0_CSM_CNTRL3, csm3);
1258                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL4, STB0899_OFF0_CSM_CNTRL4, csm4);
1259         }
1260 }
1261
1262 /*
1263  * stb0899_dvbs2_get_srate
1264  * get DVB-S2 Symbol Rate
1265  */
1266 static u32 stb0899_dvbs2_get_srate(struct stb0899_state *state)
1267 {
1268         struct stb0899_internal *internal = &state->internal;
1269         struct stb0899_config *config = state->config;
1270
1271         u32 bTrNomFreq, srate, decimRate, intval1, intval2, reg;
1272         int div1, div2, rem1, rem2;
1273
1274         div1 = config->btr_nco_bits / 2;
1275         div2 = config->btr_nco_bits - div1 - 1;
1276
1277         bTrNomFreq = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_NOM_FREQ);
1278
1279         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DECIM_CNTRL);
1280         decimRate = STB0899_GETFIELD(DECIM_RATE, reg);
1281         decimRate = (1 << decimRate);
1282
1283         intval1 = internal->master_clk / (1 << div1);
1284         intval2 = bTrNomFreq / (1 << div2);
1285
1286         rem1 = internal->master_clk % (1 << div1);
1287         rem2 = bTrNomFreq % (1 << div2);
1288         /* only for integer calculation */
1289         srate = (intval1 * intval2) + ((intval1 * rem2) / (1 << div2)) + ((intval2 * rem1) / (1 << div1));
1290         srate /= decimRate;     /*symbrate = (btrnomfreq_register_val*MasterClock)/2^(27+decim_rate_field) */
1291
1292         return  srate;
1293 }
1294
1295 /*
1296  * stb0899_dvbs2_algo
1297  * Search for signal, timing, carrier and data for a given
1298  * frequency in a given range
1299  */
1300 enum stb0899_status stb0899_dvbs2_algo(struct stb0899_state *state)
1301 {
1302         struct stb0899_internal *internal = &state->internal;
1303         enum stb0899_modcod modcod;
1304
1305         s32 offsetfreq, searchTime, FecLockTime, pilots, iqSpectrum;
1306         int i = 0;
1307         u32 reg, csm1;
1308
1309         if (internal->srate <= 2000000) {
1310                 searchTime      = 5000; /* 5000 ms max time to lock UWP and CSM, SYMB <= 2Mbs           */
1311                 FecLockTime     = 350;  /* 350  ms max time to lock FEC, SYMB <= 2Mbs                   */
1312         } else if (internal->srate <= 5000000) {
1313                 searchTime      = 2500; /* 2500 ms max time to lock UWP and CSM, 2Mbs < SYMB <= 5Mbs    */
1314                 FecLockTime     = 170;  /* 170  ms max time to lock FEC, 2Mbs< SYMB <= 5Mbs             */
1315         } else if (internal->srate <= 10000000) {
1316                 searchTime      = 1500; /* 1500 ms max time to lock UWP and CSM, 5Mbs <SYMB <= 10Mbs    */
1317                 FecLockTime     = 80;   /* 80  ms max time to lock FEC, 5Mbs< SYMB <= 10Mbs             */
1318         } else if (internal->srate <= 15000000) {
1319                 searchTime      = 500;  /* 500 ms max time to lock UWP and CSM, 10Mbs <SYMB <= 15Mbs    */
1320                 FecLockTime     = 50;   /* 50  ms max time to lock FEC, 10Mbs< SYMB <= 15Mbs            */
1321         } else if (internal->srate <= 20000000) {
1322                 searchTime      = 300;  /* 300 ms max time to lock UWP and CSM, 15Mbs < SYMB <= 20Mbs   */
1323                 FecLockTime     = 30;   /* 50  ms max time to lock FEC, 15Mbs< SYMB <= 20Mbs            */
1324         } else if (internal->srate <= 25000000) {
1325                 searchTime      = 250;  /* 250 ms max time to lock UWP and CSM, 20 Mbs < SYMB <= 25Mbs  */
1326                 FecLockTime     = 25;   /* 25 ms max time to lock FEC, 20Mbs< SYMB <= 25Mbs             */
1327         } else {
1328                 searchTime      = 150;  /* 150 ms max time to lock UWP and CSM, SYMB > 25Mbs            */
1329                 FecLockTime     = 20;   /* 20 ms max time to lock FEC, 20Mbs< SYMB <= 25Mbs             */
1330         }
1331
1332         /* Maintain Stream Merger in reset during acquisition   */
1333         reg = stb0899_read_reg(state, STB0899_TSTRES);
1334         STB0899_SETFIELD_VAL(FRESRS, reg, 1);
1335         stb0899_write_reg(state, STB0899_TSTRES, reg);
1336
1337         /* enable tuner I/O */
1338         stb0899_i2c_gate_ctrl(&state->frontend, 1);
1339
1340         /* Move tuner to frequency      */
1341         if (state->config->tuner_set_frequency)
1342                 state->config->tuner_set_frequency(&state->frontend, internal->freq);
1343         if (state->config->tuner_get_frequency)
1344                 state->config->tuner_get_frequency(&state->frontend, &internal->freq);
1345
1346         /* disable tuner I/O */
1347         stb0899_i2c_gate_ctrl(&state->frontend, 0);
1348
1349         /* Set IF AGC to acquisition    */
1350         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL);
1351         STB0899_SETFIELD_VAL(IF_LOOP_GAIN, reg,  4);
1352         STB0899_SETFIELD_VAL(IF_AGC_REF, reg, 32);
1353         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL, STB0899_OFF0_IF_AGC_CNTRL, reg);
1354
1355         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL2);
1356         STB0899_SETFIELD_VAL(IF_AGC_DUMP_PER, reg, 0);
1357         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL2, STB0899_OFF0_IF_AGC_CNTRL2, reg);
1358
1359         /* Initialisation       */
1360         stb0899_dvbs2_init_calc(state);
1361
1362         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_CNTRL2);
1363         switch (internal->inversion) {
1364         case IQ_SWAP_OFF:
1365                 STB0899_SETFIELD_VAL(SPECTRUM_INVERT, reg, 0);
1366                 break;
1367         case IQ_SWAP_ON:
1368                 STB0899_SETFIELD_VAL(SPECTRUM_INVERT, reg, 1);
1369                 break;
1370         case IQ_SWAP_AUTO:      /* use last successful search first     */
1371                 STB0899_SETFIELD_VAL(SPECTRUM_INVERT, reg, 1);
1372                 break;
1373         }
1374         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_DMD_CNTRL2, STB0899_OFF0_DMD_CNTRL2, reg);
1375         stb0899_dvbs2_reacquire(state);
1376
1377         /* Wait for demod lock (UWP and CSM)    */
1378         internal->status = stb0899_dvbs2_get_dmd_status(state, searchTime);
1379
1380         if (internal->status == DVBS2_DEMOD_LOCK) {
1381                 dprintk(state->verbose, FE_DEBUG, 1, "------------> DVB-S2 DEMOD LOCK !");
1382                 i = 0;
1383                 /* Demod Locked, check FEC status       */
1384                 internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
1385
1386                 /*If false lock (UWP and CSM Locked but no FEC) try 3 time max*/
1387                 while ((internal->status != DVBS2_FEC_LOCK) && (i < 3)) {
1388                         /*      Read the frequency offset*/
1389                         offsetfreq = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_FREQ);
1390
1391                         /* Set the Nominal frequency to the found frequency offset for the next reacquire*/
1392                         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_NOM_FREQ);
1393                         STB0899_SETFIELD_VAL(CRL_NOM_FREQ, reg, offsetfreq);
1394                         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_NOM_FREQ, STB0899_OFF0_CRL_NOM_FREQ, reg);
1395                         stb0899_dvbs2_reacquire(state);
1396                         internal->status = stb0899_dvbs2_get_fec_status(state, searchTime);
1397                         i++;
1398                 }
1399         }
1400
1401         if (internal->status != DVBS2_FEC_LOCK) {
1402                 if (internal->inversion == IQ_SWAP_AUTO) {
1403                         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_CNTRL2);
1404                         iqSpectrum = STB0899_GETFIELD(SPECTRUM_INVERT, reg);
1405                         /* IQ Spectrum Inversion        */
1406                         STB0899_SETFIELD_VAL(SPECTRUM_INVERT, reg, !iqSpectrum);
1407                         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_DMD_CNTRL2, STB0899_OFF0_DMD_CNTRL2, reg);
1408                         /* start acquistion process     */
1409                         stb0899_dvbs2_reacquire(state);
1410
1411                         /* Wait for demod lock (UWP and CSM)    */
1412                         internal->status = stb0899_dvbs2_get_dmd_status(state, searchTime);
1413                         if (internal->status == DVBS2_DEMOD_LOCK) {
1414                                 i = 0;
1415                                 /* Demod Locked, check FEC      */
1416                                 internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
1417                                 /*try thrice for false locks, (UWP and CSM Locked but no FEC)   */
1418                                 while ((internal->status != DVBS2_FEC_LOCK) && (i < 3)) {
1419                                         /*      Read the frequency offset*/
1420                                         offsetfreq = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_FREQ);
1421
1422                                         /* Set the Nominal frequency to the found frequency offset for the next reacquire*/
1423                                         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_NOM_FREQ);
1424                                         STB0899_SETFIELD_VAL(CRL_NOM_FREQ, reg, offsetfreq);
1425                                         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_NOM_FREQ, STB0899_OFF0_CRL_NOM_FREQ, reg);
1426
1427                                         stb0899_dvbs2_reacquire(state);
1428                                         internal->status = stb0899_dvbs2_get_fec_status(state, searchTime);
1429                                         i++;
1430                                 }
1431                         }
1432 /*
1433                         if (pParams->DVBS2State == FE_DVBS2_FEC_LOCKED)
1434                                 pParams->IQLocked = !iqSpectrum;
1435 */
1436                 }
1437         }
1438         if (internal->status == DVBS2_FEC_LOCK) {
1439                 dprintk(state->verbose, FE_DEBUG, 1, "----------------> DVB-S2 FEC Lock !");
1440                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_STAT2);
1441                 modcod = STB0899_GETFIELD(UWP_DECODE_MOD, reg) >> 2;
1442                 pilots = STB0899_GETFIELD(UWP_DECODE_MOD, reg) & 0x01;
1443
1444                 if ((((10 * internal->master_clk) / (internal->srate / 10)) <= 410) &&
1445                       (INRANGE(STB0899_QPSK_23, modcod, STB0899_QPSK_910)) &&
1446                       (pilots == 1)) {
1447
1448                         stb0899_dvbs2_init_csm(state, pilots, modcod);
1449                         /* Wait for UWP,CSM and data LOCK 20ms max      */
1450                         internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
1451
1452                         i = 0;
1453                         while ((internal->status != DVBS2_FEC_LOCK) && (i < 3)) {
1454                                 csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
1455                                 STB0899_SETFIELD_VAL(CSM_TWO_PASS, csm1, 1);
1456                                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
1457                                 csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
1458                                 STB0899_SETFIELD_VAL(CSM_TWO_PASS, csm1, 0);
1459                                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
1460
1461                                 internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
1462                                 i++;
1463                         }
1464                 }
1465
1466                 if ((((10 * internal->master_clk) / (internal->srate / 10)) <= 410) &&
1467                       (INRANGE(STB0899_QPSK_12, modcod, STB0899_QPSK_35)) &&
1468                       (pilots == 1)) {
1469
1470                         /* Equalizer Disable update      */
1471                         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, EQ_CNTRL);
1472                         STB0899_SETFIELD_VAL(EQ_DISABLE_UPDATE, reg, 1);
1473                         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQ_CNTRL, STB0899_OFF0_EQ_CNTRL, reg);
1474                 }
1475
1476                 /* slow down the Equalizer once locked  */
1477                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, EQ_CNTRL);
1478                 STB0899_SETFIELD_VAL(EQ_SHIFT, reg, 0x02);
1479                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQ_CNTRL, STB0899_OFF0_EQ_CNTRL, reg);
1480
1481                 /* Store signal parameters      */
1482                 offsetfreq = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_FREQ);
1483
1484                 offsetfreq = offsetfreq / ((1 << 30) / 1000);
1485                 offsetfreq *= (internal->master_clk / 1000000);
1486                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_CNTRL2);
1487                 if (STB0899_GETFIELD(SPECTRUM_INVERT, reg))
1488                         offsetfreq *= -1;
1489
1490                 internal->freq = internal->freq - offsetfreq;
1491                 internal->srate = stb0899_dvbs2_get_srate(state);
1492
1493                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_STAT2);
1494                 internal->modcod = STB0899_GETFIELD(UWP_DECODE_MOD, reg) >> 2;
1495                 internal->pilots = STB0899_GETFIELD(UWP_DECODE_MOD, reg) & 0x01;
1496                 internal->frame_length = (STB0899_GETFIELD(UWP_DECODE_MOD, reg) >> 1) & 0x01;
1497
1498                  /* Set IF AGC to tracking      */
1499                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL);
1500                 STB0899_SETFIELD_VAL(IF_LOOP_GAIN, reg,  3);
1501
1502                 /* if QPSK 1/2,QPSK 3/5 or QPSK 2/3 set IF AGC reference to 16 otherwise 32*/
1503                 if (INRANGE(STB0899_QPSK_12, internal->modcod, STB0899_QPSK_23))
1504                         STB0899_SETFIELD_VAL(IF_AGC_REF, reg, 16);
1505
1506                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL, STB0899_OFF0_IF_AGC_CNTRL, reg);
1507
1508                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL2);
1509                 STB0899_SETFIELD_VAL(IF_AGC_DUMP_PER, reg, 7);
1510                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL2, STB0899_OFF0_IF_AGC_CNTRL2, reg);
1511         }
1512
1513         /* Release Stream Merger Reset          */
1514         reg = stb0899_read_reg(state, STB0899_TSTRES);
1515         STB0899_SETFIELD_VAL(FRESRS, reg, 0);
1516         stb0899_write_reg(state, STB0899_TSTRES, reg);
1517
1518         return internal->status;
1519 }