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 <linux/bitops.h>
  23 #include "stb0899_drv.h"
  24 #include "stb0899_priv.h"
  25 #include "stb0899_reg.h"
  26
  27 static inline u32 stb0899_do_div(u64 n, u32 d)
  28 {
  29         /* wrap do_div() for ease of use */
  30
  31         do_div(n, d);
  32         return n;
  33 }
  34
  35 #if 0
  36 /* These functions are currently unused */
  37 /*
  38  * stb0899_calc_srate
  39  * Compute symbol rate
  40  */
  41 static u32 stb0899_calc_srate(u32 master_clk, u8 *sfr)
  42 {
  43         u64 tmp;
  44
  45         /* srate = (SFR * master_clk) >> 20 */
  46
  47         /* sfr is of size 20 bit, stored with an offset of 4 bit */
  48         tmp = (((u32)sfr[0]) << 16) | (((u32)sfr[1]) << 8) | sfr[2];
  49         tmp &= ~0xf;
  50         tmp *= master_clk;
  51         tmp >>= 24;
  52
  53         return tmp;
  54 }
  55
  56 /*
  57  * stb0899_get_srate
  58  * Get the current symbol rate
  59  */
  60 static u32 stb0899_get_srate(struct stb0899_state *state)
  61 {
  62         struct stb0899_internal *internal = &state->internal;
  63         u8 sfr[3];
  64
  65         stb0899_read_regs(state, STB0899_SFRH, sfr, 3);
  66
  67         return stb0899_calc_srate(internal->master_clk, sfr);
  68 }
  69 #endif
  70
  71 /*
  72  * stb0899_set_srate
  73  * Set symbol frequency
  74  * MasterClock: master clock frequency (hz)
  75  * SymbolRate: symbol rate (bauds)
  76  * return symbol frequency
  77  */
  78 static u32 stb0899_set_srate(struct stb0899_state *state, u32 master_clk, u32 srate)
  79 {
  80         u32 tmp;
  81         u8 sfr[3];
  82
  83         dprintk(state->verbose, FE_DEBUG, 1, "-->");
  84         /*
  85          * in order to have the maximum precision, the symbol rate entered into
  86          * the chip is computed as the closest value of the "true value".
  87          * In this purpose, the symbol rate value is rounded (1 is added on the bit
  88          * below the LSB )
  89          *
  90          * srate = (SFR * master_clk) >> 20
  91          *      <=>
  92          *   SFR = srate << 20 / master_clk
  93          *
  94          * rounded:
  95          *   SFR = (srate << 21 + master_clk) / (2 * master_clk)
  96          *
  97          * stored as 20 bit number with an offset of 4 bit:
  98          *   sfr = SFR << 4;
  99          */
 100
 101         tmp = stb0899_do_div((((u64)srate) << 21) + master_clk, 2 * master_clk);
 102         tmp <<= 4;
 103
 104         sfr[0] = tmp >> 16;
 105         sfr[1] = tmp >>  8;
 106         sfr[2] = tmp;
 107
 108         stb0899_write_regs(state, STB0899_SFRH, sfr, 3);
 109
 110         return srate;
 111 }
 112
 113 /*
 114  * stb0899_calc_derot_time
 115  * Compute the amount of time needed by the derotator to lock
 116  * SymbolRate: Symbol rate
 117  * return: derotator time constant (ms)
 118  */
 119 static long stb0899_calc_derot_time(long srate)
 120 {
 121         if (srate > 0)
 122                 return (100000 / (srate / 1000));
 123         else
 124                 return 0;
 125 }
 126
 127 /*
 128  * stb0899_carr_width
 129  * Compute the width of the carrier
 130  * return: width of carrier (kHz or Mhz)
 131  */
 132 long stb0899_carr_width(struct stb0899_state *state)
 133 {
 134         struct stb0899_internal *internal = &state->internal;
 135
 136         return (internal->srate + (internal->srate * internal->rolloff) / 100);
 137 }
 138
 139 /*
 140  * stb0899_first_subrange
 141  * Compute the first subrange of the search
 142  */
 143 static void stb0899_first_subrange(struct stb0899_state *state)
 144 {
 145         struct stb0899_internal *internal       = &state->internal;
 146         struct stb0899_params *params           = &state->params;
 147         struct stb0899_config *config           =  state->config;
 148
 149         int range = 0;
 150         u32 bandwidth = 0;
 151
 152         if (config->tuner_get_bandwidth) {
 153                 stb0899_i2c_gate_ctrl(&state->frontend, 1);
 154                 config->tuner_get_bandwidth(&state->frontend, &bandwidth);
 155                 stb0899_i2c_gate_ctrl(&state->frontend, 0);
 156                 range = bandwidth - stb0899_carr_width(state) / 2;
 157         }
 158
 159         if (range > 0)
 160                 internal->sub_range = min(internal->srch_range, range);
 161         else
 162                 internal->sub_range = 0;
 163
 164         internal->freq = params->freq;
 165         internal->tuner_offst = 0L;
 166         internal->sub_dir = 1;
 167 }
 168
 169 /*
 170  * stb0899_check_tmg
 171  * check for timing lock
 172  * internal.Ttiming: time to wait for loop lock
 173  */
 174 static enum stb0899_status stb0899_check_tmg(struct stb0899_state *state)
 175 {
 176         struct stb0899_internal *internal = &state->internal;
 177         int lock;
 178         u8 reg;
 179         s8 timing;
 180
 181         msleep(internal->t_derot);
 182
 183         stb0899_write_reg(state, STB0899_RTF, 0xf2);
 184         reg = stb0899_read_reg(state, STB0899_TLIR);
 185         lock = STB0899_GETFIELD(TLIR_TMG_LOCK_IND, reg);
 186         timing = stb0899_read_reg(state, STB0899_RTF);
 187
 188         if (lock >= 42) {
 189                 if ((lock > 48) && (abs(timing) >= 110)) {
 190                         internal->status = ANALOGCARRIER;
 191                         dprintk(state->verbose, FE_DEBUG, 1, "-->ANALOG Carrier !");
 192                 } else {
 193                         internal->status = TIMINGOK;
 194                         dprintk(state->verbose, FE_DEBUG, 1, "------->TIMING OK !");
 195                 }
 196         } else {
 197                 internal->status = NOTIMING;
 198                 dprintk(state->verbose, FE_DEBUG, 1, "-->NO TIMING !");
 199         }
 200         return internal->status;
 201 }
 202
 203 /*
 204  * stb0899_search_tmg
 205  * perform a fs/2 zig-zag to find timing
 206  */
 207 static enum stb0899_status stb0899_search_tmg(struct stb0899_state *state)
 208 {
 209         struct stb0899_internal *internal = &state->internal;
 210         struct stb0899_params *params = &state->params;
 211
 212         short int derot_step, derot_freq = 0, derot_limit, next_loop = 3;
 213         int index = 0;
 214         u8 cfr[2];
 215
 216         internal->status = NOTIMING;
 217
 218         /* timing loop computation & symbol rate optimisation   */
 219         derot_limit = (internal->sub_range / 2L) / internal->mclk;
 220         derot_step = (params->srate / 2L) / internal->mclk;
 221
 222         while ((stb0899_check_tmg(state) != TIMINGOK) && next_loop) {
 223                 index++;
 224                 derot_freq += index * internal->direction * derot_step; /* next derot zig zag position  */
 225
 226                 if (abs(derot_freq) > derot_limit)
 227                         next_loop--;
 228
 229                 if (next_loop) {
 230                         STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(internal->inversion * derot_freq));
 231                         STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(internal->inversion * derot_freq));
 232                         stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency         */
 233                 }
 234                 internal->direction = -internal->direction;     /* Change zigzag direction              */
 235         }
 236
 237         if (internal->status == TIMINGOK) {
 238                 stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency              */
 239                 internal->derot_freq = internal->inversion * MAKEWORD16(cfr[0], cfr[1]);
 240                 dprintk(state->verbose, FE_DEBUG, 1, "------->TIMING OK ! Derot Freq = %d", internal->derot_freq);
 241         }
 242
 243         return internal->status;
 244 }
 245
 246 /*
 247  * stb0899_check_carrier
 248  * Check for carrier found
 249  */
 250 static enum stb0899_status stb0899_check_carrier(struct stb0899_state *state)
 251 {
 252         struct stb0899_internal *internal = &state->internal;
 253         u8 reg;
 254
 255         msleep(internal->t_derot); /* wait for derotator ok     */
 256
 257         reg = stb0899_read_reg(state, STB0899_CFD);
 258         STB0899_SETFIELD_VAL(CFD_ON, reg, 1);
 259         stb0899_write_reg(state, STB0899_CFD, reg);
 260
 261         reg = stb0899_read_reg(state, STB0899_DSTATUS);
 262         dprintk(state->verbose, FE_DEBUG, 1, "--------------------> STB0899_DSTATUS=[0x%02x]", reg);
 263         if (STB0899_GETFIELD(CARRIER_FOUND, reg)) {
 264                 internal->status = CARRIEROK;
 265                 dprintk(state->verbose, FE_DEBUG, 1, "-------------> CARRIEROK !");
 266         } else {
 267                 internal->status = NOCARRIER;
 268                 dprintk(state->verbose, FE_DEBUG, 1, "-------------> NOCARRIER !");
 269         }
 270
 271         return internal->status;
 272 }
 273
 274 /*
 275  * stb0899_search_carrier
 276  * Search for a QPSK carrier with the derotator
 277  */
 278 static enum stb0899_status stb0899_search_carrier(struct stb0899_state *state)
 279 {
 280         struct stb0899_internal *internal = &state->internal;
 281
 282         short int derot_freq = 0, last_derot_freq = 0, derot_limit, next_loop = 3;
 283         int index = 0;
 284         u8 cfr[2];
 285         u8 reg;
 286
 287         internal->status = NOCARRIER;
 288         derot_limit = (internal->sub_range / 2L) / internal->mclk;
 289         derot_freq = internal->derot_freq;
 290
 291         reg = stb0899_read_reg(state, STB0899_CFD);
 292         STB0899_SETFIELD_VAL(CFD_ON, reg, 1);
 293         stb0899_write_reg(state, STB0899_CFD, reg);
 294
 295         do {
 296                 dprintk(state->verbose, FE_DEBUG, 1, "Derot Freq=%d, mclk=%d", derot_freq, internal->mclk);
 297                 if (stb0899_check_carrier(state) == NOCARRIER) {
 298                         index++;
 299                         last_derot_freq = derot_freq;
 300                         derot_freq += index * internal->direction * internal->derot_step; /* next zig zag derotator position */
 301
 302                         if(abs(derot_freq) > derot_limit)
 303                                 next_loop--;
 304
 305                         if (next_loop) {
 306                                 reg = stb0899_read_reg(state, STB0899_CFD);
 307                                 STB0899_SETFIELD_VAL(CFD_ON, reg, 1);
 308                                 stb0899_write_reg(state, STB0899_CFD, reg);
 309
 310                                 STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(internal->inversion * derot_freq));
 311                                 STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(internal->inversion * derot_freq));
 312                                 stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */
 313                         }
 314                 }
 315
 316                 internal->direction = -internal->direction; /* Change zigzag direction */
 317         } while ((internal->status != CARRIEROK) && next_loop);
 318
 319         if (internal->status == CARRIEROK) {
 320                 stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */
 321                 internal->derot_freq = internal->inversion * MAKEWORD16(cfr[0], cfr[1]);
 322                 dprintk(state->verbose, FE_DEBUG, 1, "----> CARRIER OK !, Derot Freq=%d", internal->derot_freq);
 323         } else {
 324                 internal->derot_freq = last_derot_freq;
 325         }
 326
 327         return internal->status;
 328 }
 329
 330 /*
 331  * stb0899_check_data
 332  * Check for data found
 333  */
 334 static enum stb0899_status stb0899_check_data(struct stb0899_state *state)
 335 {
 336         struct stb0899_internal *internal = &state->internal;
 337         struct stb0899_params *params = &state->params;
 338
 339         int lock = 0, index = 0, dataTime = 500, loop;
 340         u8 reg;
 341
 342         internal->status = NODATA;
 343
 344         /* RESET FEC    */
 345         reg = stb0899_read_reg(state, STB0899_TSTRES);
 346         STB0899_SETFIELD_VAL(FRESACS, reg, 1);
 347         stb0899_write_reg(state, STB0899_TSTRES, reg);
 348         msleep(1);
 349         reg = stb0899_read_reg(state, STB0899_TSTRES);
 350         STB0899_SETFIELD_VAL(FRESACS, reg, 0);
 351         stb0899_write_reg(state, STB0899_TSTRES, reg);
 352
 353         if (params->srate <= 2000000)
 354                 dataTime = 2000;
 355         else if (params->srate <= 5000000)
 356                 dataTime = 1500;
 357         else if (params->srate <= 15000000)
 358                 dataTime = 1000;
 359         else
 360                 dataTime = 500;
 361
 362         /* clear previous failed END_LOOPVIT */
 363         stb0899_read_reg(state, STB0899_VSTATUS);
 364
 365         stb0899_write_reg(state, STB0899_DSTATUS2, 0x00); /* force search loop  */
 366         while (1) {
 367                 /* WARNING! VIT LOCKED has to be tested before VIT_END_LOOOP    */
 368                 reg = stb0899_read_reg(state, STB0899_VSTATUS);
 369                 lock = STB0899_GETFIELD(VSTATUS_LOCKEDVIT, reg);
 370                 loop = STB0899_GETFIELD(VSTATUS_END_LOOPVIT, reg);
 371
 372                 if (lock || loop || (index > dataTime))
 373                         break;
 374                 index++;
 375         }
 376
 377         if (lock) {     /* DATA LOCK indicator  */
 378                 internal->status = DATAOK;
 379                 dprintk(state->verbose, FE_DEBUG, 1, "-----------------> DATA OK !");
 380         }
 381
 382         return internal->status;
 383 }
 384
 385 /*
 386  * stb0899_search_data
 387  * Search for a QPSK carrier with the derotator
 388  */
 389 static enum stb0899_status stb0899_search_data(struct stb0899_state *state)
 390 {
 391         short int derot_freq, derot_step, derot_limit, next_loop = 3;
 392         u8 cfr[2];
 393         u8 reg;
 394         int index = 1;
 395
 396         struct stb0899_internal *internal = &state->internal;
 397         struct stb0899_params *params = &state->params;
 398
 399         derot_step = (params->srate / 4L) / internal->mclk;
 400         derot_limit = (internal->sub_range / 2L) / internal->mclk;
 401         derot_freq = internal->derot_freq;
 402
 403         do {
 404                 if ((internal->status != CARRIEROK) || (stb0899_check_data(state) != DATAOK)) {
 405
 406                         derot_freq += index * internal->direction * derot_step; /* next zig zag derotator position */
 407                         if (abs(derot_freq) > derot_limit)
 408                                 next_loop--;
 409
 410                         if (next_loop) {
 411                                 dprintk(state->verbose, FE_DEBUG, 1, "Derot freq=%d, mclk=%d", derot_freq, internal->mclk);
 412                                 reg = stb0899_read_reg(state, STB0899_CFD);
 413                                 STB0899_SETFIELD_VAL(CFD_ON, reg, 1);
 414                                 stb0899_write_reg(state, STB0899_CFD, reg);
 415
 416                                 STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(internal->inversion * derot_freq));
 417                                 STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(internal->inversion * derot_freq));
 418                                 stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */
 419
 420                                 stb0899_check_carrier(state);
 421                                 index++;
 422                         }
 423                 }
 424                 internal->direction = -internal->direction; /* change zig zag direction */
 425         } while ((internal->status != DATAOK) && next_loop);
 426
 427         if (internal->status == DATAOK) {
 428                 stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */
 429
 430                 /* store autodetected IQ swapping as default for DVB-S2 tuning */
 431                 reg = stb0899_read_reg(state, STB0899_IQSWAP);
 432                 if (STB0899_GETFIELD(SYM, reg))
 433                         internal->inversion = IQ_SWAP_ON;
 434                 else
 435                         internal->inversion = IQ_SWAP_OFF;
 436
 437                 internal->derot_freq = internal->inversion * MAKEWORD16(cfr[0], cfr[1]);
 438                 dprintk(state->verbose, FE_DEBUG, 1, "------> DATAOK ! Derot Freq=%d", internal->derot_freq);
 439         }
 440
 441         return internal->status;
 442 }
 443
 444 /*
 445  * stb0899_check_range
 446  * check if the found frequency is in the correct range
 447  */
 448 static enum stb0899_status stb0899_check_range(struct stb0899_state *state)
 449 {
 450         struct stb0899_internal *internal = &state->internal;
 451         struct stb0899_params *params = &state->params;
 452
 453         int range_offst, tp_freq;
 454
 455         range_offst = internal->srch_range / 2000;
 456         tp_freq = internal->freq - (internal->derot_freq * internal->mclk) / 1000;
 457
 458         if ((tp_freq >= params->freq - range_offst) && (tp_freq <= params->freq + range_offst)) {
 459                 internal->status = RANGEOK;
 460                 dprintk(state->verbose, FE_DEBUG, 1, "----> RANGEOK !");
 461         } else {
 462                 internal->status = OUTOFRANGE;
 463                 dprintk(state->verbose, FE_DEBUG, 1, "----> OUT OF RANGE !");
 464         }
 465
 466         return internal->status;
 467 }
 468
 469 /*
 470  * NextSubRange
 471  * Compute the next subrange of the search
 472  */
 473 static void next_sub_range(struct stb0899_state *state)
 474 {
 475         struct stb0899_internal *internal = &state->internal;
 476         struct stb0899_params *params = &state->params;
 477
 478         long old_sub_range;
 479
 480         if (internal->sub_dir > 0) {
 481                 old_sub_range = internal->sub_range;
 482                 internal->sub_range = min((internal->srch_range / 2) -
 483                                           (internal->tuner_offst + internal->sub_range / 2),
 484                                            internal->sub_range);
 485
 486                 if (internal->sub_range < 0)
 487                         internal->sub_range = 0;
 488
 489                 internal->tuner_offst += (old_sub_range + internal->sub_range) / 2;
 490         }
 491
 492         internal->freq = params->freq + (internal->sub_dir * internal->tuner_offst) / 1000;
 493         internal->sub_dir = -internal->sub_dir;
 494 }
 495
 496 /*
 497  * stb0899_dvbs_algo
 498  * Search for a signal, timing, carrier and data for a
 499  * given frequency in a given range
 500  */
 501 enum stb0899_status stb0899_dvbs_algo(struct stb0899_state *state)
 502 {
 503         struct stb0899_params *params           = &state->params;
 504         struct stb0899_internal *internal       = &state->internal;
 505         struct stb0899_config *config           = state->config;
 506
 507         u8 bclc, reg;
 508         u8 cfr[2];
 509         u8 eq_const[10];
 510         s32 clnI = 3;
 511         u32 bandwidth = 0;
 512
 513         /* BETA values rated @ 99MHz    */
 514         s32 betaTab[5][4] = {
 515                /*  5   10   20   30MBps */
 516                 { 37,  34,  32,  31 }, /* QPSK 1/2      */
 517                 { 37,  35,  33,  31 }, /* QPSK 2/3      */
 518                 { 37,  35,  33,  31 }, /* QPSK 3/4      */
 519                 { 37,  36,  33,  32 }, /* QPSK 5/6      */
 520                 { 37,  36,  33,  32 }  /* QPSK 7/8      */
 521         };
 522
 523         internal->direction = 1;
 524
 525         stb0899_set_srate(state, internal->master_clk, params->srate);
 526         /* Carrier loop optimization versus symbol rate for acquisition*/
 527         if (params->srate <= 5000000) {
 528                 stb0899_write_reg(state, STB0899_ACLC, 0x89);
 529                 bclc = stb0899_read_reg(state, STB0899_BCLC);
 530                 STB0899_SETFIELD_VAL(BETA, bclc, 0x1c);
 531                 stb0899_write_reg(state, STB0899_BCLC, bclc);
 532                 clnI = 0;
 533         } else if (params->srate <= 15000000) {
 534                 stb0899_write_reg(state, STB0899_ACLC, 0xc9);
 535                 bclc = stb0899_read_reg(state, STB0899_BCLC);
 536                 STB0899_SETFIELD_VAL(BETA, bclc, 0x22);
 537                 stb0899_write_reg(state, STB0899_BCLC, bclc);
 538                 clnI = 1;
 539         } else if(params->srate <= 25000000) {
 540                 stb0899_write_reg(state, STB0899_ACLC, 0x89);
 541                 bclc = stb0899_read_reg(state, STB0899_BCLC);
 542                 STB0899_SETFIELD_VAL(BETA, bclc, 0x27);
 543                 stb0899_write_reg(state, STB0899_BCLC, bclc);
 544                 clnI = 2;
 545         } else {
 546                 stb0899_write_reg(state, STB0899_ACLC, 0xc8);
 547                 bclc = stb0899_read_reg(state, STB0899_BCLC);
 548                 STB0899_SETFIELD_VAL(BETA, bclc, 0x29);
 549                 stb0899_write_reg(state, STB0899_BCLC, bclc);
 550                 clnI = 3;
 551         }
 552
 553         dprintk(state->verbose, FE_DEBUG, 1, "Set the timing loop to acquisition");
 554         /* Set the timing loop to acquisition   */
 555         stb0899_write_reg(state, STB0899_RTC, 0x46);
 556         stb0899_write_reg(state, STB0899_CFD, 0xee);
 557
 558         /* !! WARNING !!
 559          * Do not read any status variables while acquisition,
 560          * If any needed, read before the acquisition starts
 561          * querying status while acquiring causes the
 562          * acquisition to go bad and hence no locks.
 563          */
 564         dprintk(state->verbose, FE_DEBUG, 1, "Derot Percent=%d Srate=%d mclk=%d",
 565                 internal->derot_percent, params->srate, internal->mclk);
 566
 567         /* Initial calculations */
 568         internal->derot_step = internal->derot_percent * (params->srate / 1000L) / internal->mclk; /* DerotStep/1000 * Fsymbol  */
 569         internal->t_derot = stb0899_calc_derot_time(params->srate);
 570         internal->t_data = 500;
 571
 572         dprintk(state->verbose, FE_DEBUG, 1, "RESET stream merger");
 573         /* RESET Stream merger  */
 574         reg = stb0899_read_reg(state, STB0899_TSTRES);
 575         STB0899_SETFIELD_VAL(FRESRS, reg, 1);
 576         stb0899_write_reg(state, STB0899_TSTRES, reg);
 577
 578         /*
 579          * Set KDIVIDER to an intermediate value between
 580          * 1/2 and 7/8 for acquisition
 581          */
 582         reg = stb0899_read_reg(state, STB0899_DEMAPVIT);
 583         STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 60);
 584         stb0899_write_reg(state, STB0899_DEMAPVIT, reg);
 585
 586         stb0899_write_reg(state, STB0899_EQON, 0x01); /* Equalizer OFF while acquiring */
 587         stb0899_write_reg(state, STB0899_VITSYNC, 0x19);
 588
 589         stb0899_first_subrange(state);
 590         do {
 591                 /* Initialisations */
 592                 cfr[0] = cfr[1] = 0;
 593                 stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* RESET derotator frequency   */
 594
 595                 stb0899_write_reg(state, STB0899_RTF, 0);
 596                 reg = stb0899_read_reg(state, STB0899_CFD);
 597                 STB0899_SETFIELD_VAL(CFD_ON, reg, 1);
 598                 stb0899_write_reg(state, STB0899_CFD, reg);
 599
 600                 internal->derot_freq = 0;
 601                 internal->status = NOAGC1;
 602
 603                 /* enable tuner I/O */
 604                 stb0899_i2c_gate_ctrl(&state->frontend, 1);
 605
 606                 /* Move tuner to frequency */
 607                 dprintk(state->verbose, FE_DEBUG, 1, "Tuner set frequency");
 608                 if (state->config->tuner_set_frequency)
 609                         state->config->tuner_set_frequency(&state->frontend, internal->freq);
 610
 611                 if (state->config->tuner_get_frequency)
 612                         state->config->tuner_get_frequency(&state->frontend, &internal->freq);
 613
 614                 msleep(internal->t_agc1 + internal->t_agc2 + internal->t_derot); /* AGC1, AGC2 and timing loop  */
 615                 dprintk(state->verbose, FE_DEBUG, 1, "current derot freq=%d", internal->derot_freq);
 616                 internal->status = AGC1OK;
 617
 618                 /* There is signal in the band  */
 619                 if (config->tuner_get_bandwidth)
 620                         config->tuner_get_bandwidth(&state->frontend, &bandwidth);
 621
 622                 /* disable tuner I/O */
 623                 stb0899_i2c_gate_ctrl(&state->frontend, 0);
 624
 625                 if (params->srate <= bandwidth / 2)
 626                         stb0899_search_tmg(state); /* For low rates (SCPC)      */
 627                 else
 628                         stb0899_check_tmg(state); /* For high rates (MCPC)      */
 629
 630                 if (internal->status == TIMINGOK) {
 631                         dprintk(state->verbose, FE_DEBUG, 1,
 632                                 "TIMING OK ! Derot freq=%d, mclk=%d",
 633                                 internal->derot_freq, internal->mclk);
 634
 635                         if (stb0899_search_carrier(state) == CARRIEROK) {       /* Search for carrier   */
 636                                 dprintk(state->verbose, FE_DEBUG, 1,
 637                                         "CARRIER OK ! Derot freq=%d, mclk=%d",
 638                                         internal->derot_freq, internal->mclk);
 639
 640                                 if (stb0899_search_data(state) == DATAOK) {     /* Check for data       */
 641                                         dprintk(state->verbose, FE_DEBUG, 1,
 642                                                 "DATA OK ! Derot freq=%d, mclk=%d",
 643                                                 internal->derot_freq, internal->mclk);
 644
 645                                         if (stb0899_check_range(state) == RANGEOK) {
 646                                                 dprintk(state->verbose, FE_DEBUG, 1,
 647                                                         "RANGE OK ! derot freq=%d, mclk=%d",
 648                                                         internal->derot_freq, internal->mclk);
 649
 650                                                 internal->freq = params->freq - ((internal->derot_freq * internal->mclk) / 1000);
 651                                                 reg = stb0899_read_reg(state, STB0899_PLPARM);
 652                                                 internal->fecrate = STB0899_GETFIELD(VITCURPUN, reg);
 653                                                 dprintk(state->verbose, FE_DEBUG, 1,
 654                                                         "freq=%d, internal resultant freq=%d",
 655                                                         params->freq, internal->freq);
 656
 657                                                 dprintk(state->verbose, FE_DEBUG, 1,
 658                                                         "internal puncture rate=%d",
 659                                                         internal->fecrate);
 660                                         }
 661                                 }
 662                         }
 663                 }
 664                 if (internal->status != RANGEOK)
 665                         next_sub_range(state);
 666
 667         } while (internal->sub_range && internal->status != RANGEOK);
 668
 669         /* Set the timing loop to tracking      */
 670         stb0899_write_reg(state, STB0899_RTC, 0x33);
 671         stb0899_write_reg(state, STB0899_CFD, 0xf7);
 672         /* if locked and range ok, set Kdiv     */
 673         if (internal->status == RANGEOK) {
 674                 dprintk(state->verbose, FE_DEBUG, 1, "Locked & Range OK !");
 675                 stb0899_write_reg(state, STB0899_EQON, 0x41);           /* Equalizer OFF while acquiring        */
 676                 stb0899_write_reg(state, STB0899_VITSYNC, 0x39);        /* SN to b'11 for acquisition           */
 677
 678                 /*
 679                  * Carrier loop optimization versus
 680                  * symbol Rate/Puncture Rate for Tracking
 681                  */
 682                 reg = stb0899_read_reg(state, STB0899_BCLC);
 683                 switch (internal->fecrate) {
 684                 case STB0899_FEC_1_2:           /* 13   */
 685                         stb0899_write_reg(state, STB0899_DEMAPVIT, 0x1a);
 686                         STB0899_SETFIELD_VAL(BETA, reg, betaTab[0][clnI]);
 687                         stb0899_write_reg(state, STB0899_BCLC, reg);
 688                         break;
 689                 case STB0899_FEC_2_3:           /* 18   */
 690                         stb0899_write_reg(state, STB0899_DEMAPVIT, 44);
 691                         STB0899_SETFIELD_VAL(BETA, reg, betaTab[1][clnI]);
 692                         stb0899_write_reg(state, STB0899_BCLC, reg);
 693                         break;
 694                 case STB0899_FEC_3_4:           /* 21   */
 695                         stb0899_write_reg(state, STB0899_DEMAPVIT, 60);
 696                         STB0899_SETFIELD_VAL(BETA, reg, betaTab[2][clnI]);
 697                         stb0899_write_reg(state, STB0899_BCLC, reg);
 698                         break;
 699                 case STB0899_FEC_5_6:           /* 24   */
 700                         stb0899_write_reg(state, STB0899_DEMAPVIT, 75);
 701                         STB0899_SETFIELD_VAL(BETA, reg, betaTab[3][clnI]);
 702                         stb0899_write_reg(state, STB0899_BCLC, reg);
 703                         break;
 704                 case STB0899_FEC_6_7:           /* 25   */
 705                         stb0899_write_reg(state, STB0899_DEMAPVIT, 88);
 706                         stb0899_write_reg(state, STB0899_ACLC, 0x88);
 707                         stb0899_write_reg(state, STB0899_BCLC, 0x9a);
 708                         break;
 709                 case STB0899_FEC_7_8:           /* 26   */
 710                         stb0899_write_reg(state, STB0899_DEMAPVIT, 94);
 711                         STB0899_SETFIELD_VAL(BETA, reg, betaTab[4][clnI]);
 712                         stb0899_write_reg(state, STB0899_BCLC, reg);
 713                         break;
 714                 default:
 715                         dprintk(state->verbose, FE_DEBUG, 1, "Unsupported Puncture Rate");
 716                         break;
 717                 }
 718                 /* release stream merger RESET  */
 719                 reg = stb0899_read_reg(state, STB0899_TSTRES);
 720                 STB0899_SETFIELD_VAL(FRESRS, reg, 0);
 721                 stb0899_write_reg(state, STB0899_TSTRES, reg);
 722
 723                 /* disable carrier detector     */
 724                 reg = stb0899_read_reg(state, STB0899_CFD);
 725                 STB0899_SETFIELD_VAL(CFD_ON, reg, 0);
 726                 stb0899_write_reg(state, STB0899_CFD, reg);
 727
 728                 stb0899_read_regs(state, STB0899_EQUAI1, eq_const, 10);
 729         }
 730
 731         return internal->status;
 732 }
 733
 734 /*
 735  * stb0899_dvbs2_config_uwp
 736  * Configure UWP state machine
 737  */
 738 static void stb0899_dvbs2_config_uwp(struct stb0899_state *state)
 739 {
 740         struct stb0899_internal *internal = &state->internal;
 741         struct stb0899_config *config = state->config;
 742         u32 uwp1, uwp2, uwp3, reg;
 743
 744         uwp1 = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_CNTRL1);
 745         uwp2 = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_CNTRL2);
 746         uwp3 = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_CNTRL3);
 747
 748         STB0899_SETFIELD_VAL(UWP_ESN0_AVE, uwp1, config->esno_ave);
 749         STB0899_SETFIELD_VAL(UWP_ESN0_QUANT, uwp1, config->esno_quant);
 750         STB0899_SETFIELD_VAL(UWP_TH_SOF, uwp1, config->uwp_threshold_sof);
 751
 752         STB0899_SETFIELD_VAL(FE_COARSE_TRK, uwp2, internal->av_frame_coarse);
 753         STB0899_SETFIELD_VAL(FE_FINE_TRK, uwp2, internal->av_frame_fine);
 754         STB0899_SETFIELD_VAL(UWP_MISS_TH, uwp2, config->miss_threshold);
 755
 756         STB0899_SETFIELD_VAL(UWP_TH_ACQ, uwp3, config->uwp_threshold_acq);
 757         STB0899_SETFIELD_VAL(UWP_TH_TRACK, uwp3, config->uwp_threshold_track);
 758
 759         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_UWP_CNTRL1, STB0899_OFF0_UWP_CNTRL1, uwp1);
 760         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_UWP_CNTRL2, STB0899_OFF0_UWP_CNTRL2, uwp2);
 761         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_UWP_CNTRL3, STB0899_OFF0_UWP_CNTRL3, uwp3);
 762
 763         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, SOF_SRCH_TO);
 764         STB0899_SETFIELD_VAL(SOF_SEARCH_TIMEOUT, reg, config->sof_search_timeout);
 765         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_SOF_SRCH_TO, STB0899_OFF0_SOF_SRCH_TO, reg);
 766 }
 767
 768 /*
 769  * stb0899_dvbs2_config_csm_auto
 770  * Set CSM to AUTO mode
 771  */
 772 static void stb0899_dvbs2_config_csm_auto(struct stb0899_state *state)
 773 {
 774         u32 reg;
 775
 776         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
 777         STB0899_SETFIELD_VAL(CSM_AUTO_PARAM, reg, 1);
 778         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, reg);
 779 }
 780
 781 static long Log2Int(int number)
 782 {
 783         int i;
 784
 785         i = 0;
 786         while ((1 << i) <= abs(number))
 787                 i++;
 788
 789         if (number == 0)
 790                 i = 1;
 791
 792         return i - 1;
 793 }
 794
 795 /*
 796  * stb0899_dvbs2_calc_srate
 797  * compute BTR_NOM_FREQ for the symbol rate
 798  */
 799 static u32 stb0899_dvbs2_calc_srate(struct stb0899_state *state)
 800 {
 801         struct stb0899_internal *internal       = &state->internal;
 802         struct stb0899_config *config           = state->config;
 803
 804         u32 dec_ratio, dec_rate, decim, remain, intval, btr_nom_freq;
 805         u32 master_clk, srate;
 806
 807         dec_ratio = (internal->master_clk * 2) / (5 * internal->srate);
 808         dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio;
 809         dec_rate = Log2Int(dec_ratio);
 810         decim = 1 << dec_rate;
 811         master_clk = internal->master_clk / 1000;
 812         srate = internal->srate / 1000;
 813
 814         if (decim <= 4) {
 815                 intval = (decim * (1 << (config->btr_nco_bits - 1))) / master_clk;
 816                 remain = (decim * (1 << (config->btr_nco_bits - 1))) % master_clk;
 817         } else {
 818                 intval = (1 << (config->btr_nco_bits - 1)) / (master_clk / 100) * decim / 100;
 819                 remain = (decim * (1 << (config->btr_nco_bits - 1))) % master_clk;
 820         }
 821         btr_nom_freq = (intval * srate) + ((remain * srate) / master_clk);
 822
 823         return btr_nom_freq;
 824 }
 825
 826 /*
 827  * stb0899_dvbs2_calc_dev
 828  * compute the correction to be applied to symbol rate
 829  */
 830 static u32 stb0899_dvbs2_calc_dev(struct stb0899_state *state)
 831 {
 832         struct stb0899_internal *internal = &state->internal;
 833         u32 dec_ratio, correction, master_clk, srate;
 834
 835         dec_ratio = (internal->master_clk * 2) / (5 * internal->srate);
 836         dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio;
 837
 838         master_clk = internal->master_clk / 1000;       /* for integer Caculation*/
 839         srate = internal->srate / 1000; /* for integer Caculation*/
 840         correction = (512 * master_clk) / (2 * dec_ratio * srate);
 841
 842         return  correction;
 843 }
 844
 845 /*
 846  * stb0899_dvbs2_set_srate
 847  * Set DVBS2 symbol rate
 848  */
 849 static void stb0899_dvbs2_set_srate(struct stb0899_state *state)
 850 {
 851         struct stb0899_internal *internal = &state->internal;
 852
 853         u32 dec_ratio, dec_rate, win_sel, decim, f_sym, btr_nom_freq;
 854         u32 correction, freq_adj, band_lim, decim_cntrl, reg;
 855         u8 anti_alias;
 856
 857         /*set decimation to 1*/
 858         dec_ratio = (internal->master_clk * 2) / (5 * internal->srate);
 859         dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio;
 860         dec_rate = Log2Int(dec_ratio);
 861
 862         win_sel = 0;
 863         if (dec_rate >= 5)
 864                 win_sel = dec_rate - 4;
 865
 866         decim = (1 << dec_rate);
 867         /* (FSamp/Fsymbol *100) for integer Caculation */
 868         f_sym = internal->master_clk / ((decim * internal->srate) / 1000);
 869
 870         if (f_sym <= 2250)      /* don't band limit signal going into btr block*/
 871                 band_lim = 1;
 872         else
 873                 band_lim = 0;   /* band limit signal going into btr block*/
 874
 875         decim_cntrl = ((win_sel << 3) & 0x18) + ((band_lim << 5) & 0x20) + (dec_rate & 0x7);
 876         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_DECIM_CNTRL, STB0899_OFF0_DECIM_CNTRL, decim_cntrl);
 877
 878         if (f_sym <= 3450)
 879                 anti_alias = 0;
 880         else if (f_sym <= 4250)
 881                 anti_alias = 1;
 882         else
 883                 anti_alias = 2;
 884
 885         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_ANTI_ALIAS_SEL, STB0899_OFF0_ANTI_ALIAS_SEL, anti_alias);
 886         btr_nom_freq = stb0899_dvbs2_calc_srate(state);
 887         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_NOM_FREQ, STB0899_OFF0_BTR_NOM_FREQ, btr_nom_freq);
 888
 889         correction = stb0899_dvbs2_calc_dev(state);
 890         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_CNTRL);
 891         STB0899_SETFIELD_VAL(BTR_FREQ_CORR, reg, correction);
 892         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_CNTRL, STB0899_OFF0_BTR_CNTRL, reg);
 893
 894         /* scale UWP+CSM frequency to sample rate*/
 895         freq_adj =  internal->srate / (internal->master_clk / 4096);
 896         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_FREQ_ADJ_SCALE, STB0899_OFF0_FREQ_ADJ_SCALE, freq_adj);
 897 }
 898
 899 /*
 900  * stb0899_dvbs2_set_btr_loopbw
 901  * set bit timing loop bandwidth as a percentage of the symbol rate
 902  */
 903 static void stb0899_dvbs2_set_btr_loopbw(struct stb0899_state *state)
 904 {
 905         struct stb0899_internal *internal       = &state->internal;
 906         struct stb0899_config *config           = state->config;
 907
 908         u32 sym_peak = 23, zeta = 707, loopbw_percent = 60;
 909         s32 dec_ratio, dec_rate, k_btr1_rshft, k_btr1, k_btr0_rshft;
 910         s32 k_btr0, k_btr2_rshft, k_direct_shift, k_indirect_shift;
 911         u32 decim, K, wn, k_direct, k_indirect;
 912         u32 reg;
 913
 914         dec_ratio = (internal->master_clk * 2) / (5 * internal->srate);
 915         dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio;
 916         dec_rate = Log2Int(dec_ratio);
 917         decim = (1 << dec_rate);
 918
 919         sym_peak *= 576000;
 920         K = (1 << config->btr_nco_bits) / (internal->master_clk / 1000);
 921         K *= (internal->srate / 1000000) * decim; /*k=k 10^-8*/
 922
 923         if (K != 0) {
 924                 K = sym_peak / K;
 925                 wn = (4 * zeta * zeta) + 1000000;
 926                 wn = (2 * (loopbw_percent * 1000) * 40 * zeta) /wn;  /*wn =wn 10^-8*/
 927
 928                 k_indirect = (wn * wn) / K;     /*kindirect = kindirect 10^-6*/
 929                 k_direct   = (2 * wn * zeta) / K;       /*kDirect = kDirect 10^-2*/
 930                 k_direct  *= 100;
 931
 932                 k_direct_shift = Log2Int(k_direct) - Log2Int(10000) - 2;
 933                 k_btr1_rshft = (-1 * k_direct_shift) + config->btr_gain_shift_offset;
 934                 k_btr1 = k_direct / (1 << k_direct_shift);
 935                 k_btr1 /= 10000;
 936
 937                 k_indirect_shift = Log2Int(k_indirect + 15) - 20 /*- 2*/;
 938                 k_btr0_rshft = (-1 * k_indirect_shift) + config->btr_gain_shift_offset;
 939                 k_btr0 = k_indirect * (1 << (-k_indirect_shift));
 940                 k_btr0 /= 1000000;
 941
 942                 k_btr2_rshft = 0;
 943                 if (k_btr0_rshft > 15) {
 944                         k_btr2_rshft = k_btr0_rshft - 15;
 945                         k_btr0_rshft = 15;
 946                 }
 947                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_LOOP_GAIN);
 948                 STB0899_SETFIELD_VAL(KBTR0_RSHFT, reg, k_btr0_rshft);
 949                 STB0899_SETFIELD_VAL(KBTR0, reg, k_btr0);
 950                 STB0899_SETFIELD_VAL(KBTR1_RSHFT, reg, k_btr1_rshft);
 951                 STB0899_SETFIELD_VAL(KBTR1, reg, k_btr1);
 952                 STB0899_SETFIELD_VAL(KBTR2_RSHFT, reg, k_btr2_rshft);
 953                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_LOOP_GAIN, STB0899_OFF0_BTR_LOOP_GAIN, reg);
 954         } else
 955                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_LOOP_GAIN, STB0899_OFF0_BTR_LOOP_GAIN, 0xc4c4f);
 956 }
 957
 958 /*
 959  * stb0899_dvbs2_set_carr_freq
 960  * set nominal frequency for carrier search
 961  */
 962 static void stb0899_dvbs2_set_carr_freq(struct stb0899_state *state, s32 carr_freq, u32 master_clk)
 963 {
 964         struct stb0899_config *config = state->config;
 965         s32 crl_nom_freq;
 966         u32 reg;
 967
 968         crl_nom_freq = (1 << config->crl_nco_bits) / master_clk;
 969         crl_nom_freq *= carr_freq;
 970         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_NOM_FREQ);
 971         STB0899_SETFIELD_VAL(CRL_NOM_FREQ, reg, crl_nom_freq);
 972         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_NOM_FREQ, STB0899_OFF0_CRL_NOM_FREQ, reg);
 973 }
 974
 975 /*
 976  * stb0899_dvbs2_init_calc
 977  * Initialize DVBS2 UWP, CSM, carrier and timing loops
 978  */
 979 static void stb0899_dvbs2_init_calc(struct stb0899_state *state)
 980 {
 981         struct stb0899_internal *internal = &state->internal;
 982         s32 steps, step_size;
 983         u32 range, reg;
 984
 985         /* config uwp and csm */
 986         stb0899_dvbs2_config_uwp(state);
 987         stb0899_dvbs2_config_csm_auto(state);
 988
 989         /* initialize BTR       */
 990         stb0899_dvbs2_set_srate(state);
 991         stb0899_dvbs2_set_btr_loopbw(state);
 992
 993         if (internal->srate / 1000000 >= 15)
 994                 step_size = (1 << 17) / 5;
 995         else if (internal->srate / 1000000 >= 10)
 996                 step_size = (1 << 17) / 7;
 997         else if (internal->srate / 1000000 >= 5)
 998                 step_size = (1 << 17) / 10;
 999         else
1000                 step_size = (1 << 17) / 4;
1001
1002         range = internal->srch_range / 1000000;
1003         steps = (10 * range * (1 << 17)) / (step_size * (internal->srate / 1000000));
1004         steps = (steps + 6) / 10;
1005         steps = (steps == 0) ? 1 : steps;
1006         if (steps % 2 == 0)
1007                 stb0899_dvbs2_set_carr_freq(state, internal->center_freq -
1008                                            (internal->step_size * (internal->srate / 20000000)),
1009                                            (internal->master_clk) / 1000000);
1010         else
1011                 stb0899_dvbs2_set_carr_freq(state, internal->center_freq, (internal->master_clk) / 1000000);
1012
1013         /*Set Carrier Search params (zigzag, num steps and freq step size*/
1014         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, ACQ_CNTRL2);
1015         STB0899_SETFIELD_VAL(ZIGZAG, reg, 1);
1016         STB0899_SETFIELD_VAL(NUM_STEPS, reg, steps);
1017         STB0899_SETFIELD_VAL(FREQ_STEPSIZE, reg, step_size);
1018         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_ACQ_CNTRL2, STB0899_OFF0_ACQ_CNTRL2, reg);
1019 }
1020
1021 /*
1022  * stb0899_dvbs2_btr_init
1023  * initialize the timing loop
1024  */
1025 static void stb0899_dvbs2_btr_init(struct stb0899_state *state)
1026 {
1027         u32 reg;
1028
1029         /* set enable BTR loopback      */
1030         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_CNTRL);
1031         STB0899_SETFIELD_VAL(INTRP_PHS_SENSE, reg, 1);
1032         STB0899_SETFIELD_VAL(BTR_ERR_ENA, reg, 1);
1033         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_CNTRL, STB0899_OFF0_BTR_CNTRL, reg);
1034
1035         /* fix btr freq accum at 0      */
1036         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_FREQ_INIT, STB0899_OFF0_BTR_FREQ_INIT, 0x10000000);
1037         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_FREQ_INIT, STB0899_OFF0_BTR_FREQ_INIT, 0x00000000);
1038
1039         /* fix btr freq accum at 0      */
1040         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_PHS_INIT, STB0899_OFF0_BTR_PHS_INIT, 0x10000000);
1041         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_PHS_INIT, STB0899_OFF0_BTR_PHS_INIT, 0x00000000);
1042 }
1043
1044 /*
1045  * stb0899_dvbs2_reacquire
1046  * trigger a DVB-S2 acquisition
1047  */
1048 static void stb0899_dvbs2_reacquire(struct stb0899_state *state)
1049 {
1050         u32 reg = 0;
1051
1052         /* demod soft reset     */
1053         STB0899_SETFIELD_VAL(DVBS2_RESET, reg, 1);
1054         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_RESET_CNTRL, STB0899_OFF0_RESET_CNTRL, reg);
1055
1056         /*Reset Timing Loop     */
1057         stb0899_dvbs2_btr_init(state);
1058
1059         /* reset Carrier loop   */
1060         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_FREQ_INIT, STB0899_OFF0_CRL_FREQ_INIT, (1 << 30));
1061         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_FREQ_INIT, STB0899_OFF0_CRL_FREQ_INIT, 0);
1062         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_LOOP_GAIN, STB0899_OFF0_CRL_LOOP_GAIN, 0);
1063         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_PHS_INIT, STB0899_OFF0_CRL_PHS_INIT, (1 << 30));
1064         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_PHS_INIT, STB0899_OFF0_CRL_PHS_INIT, 0);
1065
1066         /*release demod soft reset      */
1067         reg = 0;
1068         STB0899_SETFIELD_VAL(DVBS2_RESET, reg, 0);
1069         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_RESET_CNTRL, STB0899_OFF0_RESET_CNTRL, reg);
1070
1071         /* start acquisition process    */
1072         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_ACQUIRE_TRIG, STB0899_OFF0_ACQUIRE_TRIG, 1);
1073         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_LOCK_LOST, STB0899_OFF0_LOCK_LOST, 0);
1074
1075         /* equalizer Init       */
1076         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQUALIZER_INIT, STB0899_OFF0_EQUALIZER_INIT, 1);
1077
1078         /*Start equilizer       */
1079         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQUALIZER_INIT, STB0899_OFF0_EQUALIZER_INIT, 0);
1080
1081         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, EQ_CNTRL);
1082         STB0899_SETFIELD_VAL(EQ_SHIFT, reg, 0);
1083         STB0899_SETFIELD_VAL(EQ_DISABLE_UPDATE, reg, 0);
1084         STB0899_SETFIELD_VAL(EQ_DELAY, reg, 0x05);
1085         STB0899_SETFIELD_VAL(EQ_ADAPT_MODE, reg, 0x01);
1086         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQ_CNTRL, STB0899_OFF0_EQ_CNTRL, reg);
1087
1088         /* RESET Packet delineator      */
1089         stb0899_write_reg(state, STB0899_PDELCTRL, 0x4a);
1090 }
1091
1092 /*
1093  * stb0899_dvbs2_get_dmd_status
1094  * get DVB-S2 Demod LOCK status
1095  */
1096 static enum stb0899_status stb0899_dvbs2_get_dmd_status(struct stb0899_state *state, int timeout)
1097 {
1098         int time = -10, lock = 0, uwp, csm;
1099         u32 reg;
1100
1101         do {
1102                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_STATUS);
1103                 dprintk(state->verbose, FE_DEBUG, 1, "DMD_STATUS=[0x%02x]", reg);
1104                 if (STB0899_GETFIELD(IF_AGC_LOCK, reg))
1105                         dprintk(state->verbose, FE_DEBUG, 1, "------------->IF AGC LOCKED !");
1106                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_STAT2);
1107                 dprintk(state->verbose, FE_DEBUG, 1, "----------->DMD STAT2=[0x%02x]", reg);
1108                 uwp = STB0899_GETFIELD(UWP_LOCK, reg);
1109                 csm = STB0899_GETFIELD(CSM_LOCK, reg);
1110                 if (uwp && csm)
1111                         lock = 1;
1112
1113                 time += 10;
1114                 msleep(10);
1115
1116         } while ((!lock) && (time <= timeout));
1117
1118         if (lock) {
1119                 dprintk(state->verbose, FE_DEBUG, 1, "----------------> DVB-S2 LOCK !");
1120                 return DVBS2_DEMOD_LOCK;
1121         } else {
1122                 return DVBS2_DEMOD_NOLOCK;
1123         }
1124 }
1125
1126 /*
1127  * stb0899_dvbs2_get_data_lock
1128  * get FEC status
1129  */
1130 static int stb0899_dvbs2_get_data_lock(struct stb0899_state *state, int timeout)
1131 {
1132         int time = 0, lock = 0;
1133         u8 reg;
1134
1135         while ((!lock) && (time < timeout)) {
1136                 reg = stb0899_read_reg(state, STB0899_CFGPDELSTATUS1);
1137                 dprintk(state->verbose, FE_DEBUG, 1, "---------> CFGPDELSTATUS=[0x%02x]", reg);
1138                 lock = STB0899_GETFIELD(CFGPDELSTATUS_LOCK, reg);
1139                 time++;
1140         }
1141
1142         return lock;
1143 }
1144
1145 /*
1146  * stb0899_dvbs2_get_fec_status
1147  * get DVB-S2 FEC LOCK status
1148  */
1149 static enum stb0899_status stb0899_dvbs2_get_fec_status(struct stb0899_state *state, int timeout)
1150 {
1151         int time = 0, Locked;
1152
1153         do {
1154                 Locked = stb0899_dvbs2_get_data_lock(state, 1);
1155                 time++;
1156                 msleep(1);
1157
1158         } while ((!Locked) && (time < timeout));
1159
1160         if (Locked) {
1161                 dprintk(state->verbose, FE_DEBUG, 1, "---------->DVB-S2 FEC LOCK !");
1162                 return DVBS2_FEC_LOCK;
1163         } else {
1164                 return DVBS2_FEC_NOLOCK;
1165         }
1166 }
1167
1168
1169 /*
1170  * stb0899_dvbs2_init_csm
1171  * set parameters for manual mode
1172  */
1173 static void stb0899_dvbs2_init_csm(struct stb0899_state *state, int pilots, enum stb0899_modcod modcod)
1174 {
1175         struct stb0899_internal *internal = &state->internal;
1176
1177         s32 dvt_tbl = 1, two_pass = 0, agc_gain = 6, agc_shift = 0, loop_shift = 0, phs_diff_thr = 0x80;
1178         s32 gamma_acq, gamma_rho_acq, gamma_trk, gamma_rho_trk, lock_count_thr;
1179         u32 csm1, csm2, csm3, csm4;
1180
1181         if (((internal->master_clk / internal->srate) <= 4) && (modcod <= 11) && (pilots == 1)) {
1182                 switch (modcod) {
1183                 case STB0899_QPSK_12:
1184                         gamma_acq               = 25;
1185                         gamma_rho_acq           = 2700;
1186                         gamma_trk               = 12;
1187                         gamma_rho_trk           = 180;
1188                         lock_count_thr          = 8;
1189                         break;
1190                 case STB0899_QPSK_35:
1191                         gamma_acq               = 38;
1192                         gamma_rho_acq           = 7182;
1193                         gamma_trk               = 14;
1194                         gamma_rho_trk           = 308;
1195                         lock_count_thr          = 8;
1196                         break;
1197                 case STB0899_QPSK_23:
1198                         gamma_acq               = 42;
1199                         gamma_rho_acq           = 9408;
1200                         gamma_trk               = 17;
1201                         gamma_rho_trk           = 476;
1202                         lock_count_thr          = 8;
1203                         break;
1204                 case STB0899_QPSK_34:
1205                         gamma_acq               = 53;
1206                         gamma_rho_acq           = 16642;
1207                         gamma_trk               = 19;
1208                         gamma_rho_trk           = 646;
1209                         lock_count_thr          = 8;
1210                         break;
1211                 case STB0899_QPSK_45:
1212                         gamma_acq               = 53;
1213                         gamma_rho_acq           = 17119;
1214                         gamma_trk               = 22;
1215                         gamma_rho_trk           = 880;
1216                         lock_count_thr          = 8;
1217                         break;
1218                 case STB0899_QPSK_56:
1219                         gamma_acq               = 55;
1220                         gamma_rho_acq           = 19250;
1221                         gamma_trk               = 23;
1222                         gamma_rho_trk           = 989;
1223                         lock_count_thr          = 8;
1224                         break;
1225                 case STB0899_QPSK_89:
1226                         gamma_acq               = 60;
1227                         gamma_rho_acq           = 24240;
1228                         gamma_trk               = 24;
1229                         gamma_rho_trk           = 1176;
1230                         lock_count_thr          = 8;
1231                         break;
1232                 case STB0899_QPSK_910:
1233                         gamma_acq               = 66;
1234                         gamma_rho_acq           = 29634;
1235                         gamma_trk               = 24;
1236                         gamma_rho_trk           = 1176;
1237                         lock_count_thr          = 8;
1238                         break;
1239                 default:
1240                         gamma_acq               = 66;
1241                         gamma_rho_acq           = 29634;
1242                         gamma_trk               = 24;
1243                         gamma_rho_trk           = 1176;
1244                         lock_count_thr          = 8;
1245                         break;
1246                 }
1247
1248                 csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
1249                 STB0899_SETFIELD_VAL(CSM_AUTO_PARAM, csm1, 0);
1250                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
1251
1252                 csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
1253                 csm2 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL2);
1254                 csm3 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL3);
1255                 csm4 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL4);
1256
1257                 STB0899_SETFIELD_VAL(CSM_DVT_TABLE, csm1, dvt_tbl);
1258                 STB0899_SETFIELD_VAL(CSM_TWO_PASS, csm1, two_pass);
1259                 STB0899_SETFIELD_VAL(CSM_AGC_GAIN, csm1, agc_gain);
1260                 STB0899_SETFIELD_VAL(CSM_AGC_SHIFT, csm1, agc_shift);
1261                 STB0899_SETFIELD_VAL(FE_LOOP_SHIFT, csm1, loop_shift);
1262                 STB0899_SETFIELD_VAL(CSM_GAMMA_ACQ, csm2, gamma_acq);
1263                 STB0899_SETFIELD_VAL(CSM_GAMMA_RHOACQ, csm2, gamma_rho_acq);
1264                 STB0899_SETFIELD_VAL(CSM_GAMMA_TRACK, csm3, gamma_trk);
1265                 STB0899_SETFIELD_VAL(CSM_GAMMA_RHOTRACK, csm3, gamma_rho_trk);
1266                 STB0899_SETFIELD_VAL(CSM_LOCKCOUNT_THRESH, csm4, lock_count_thr);
1267                 STB0899_SETFIELD_VAL(CSM_PHASEDIFF_THRESH, csm4, phs_diff_thr);
1268
1269                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
1270                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL2, STB0899_OFF0_CSM_CNTRL2, csm2);
1271                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL3, STB0899_OFF0_CSM_CNTRL3, csm3);
1272                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL4, STB0899_OFF0_CSM_CNTRL4, csm4);
1273         }
1274 }
1275
1276 /*
1277  * stb0899_dvbs2_get_srate
1278  * get DVB-S2 Symbol Rate
1279  */
1280 static u32 stb0899_dvbs2_get_srate(struct stb0899_state *state)
1281 {
1282         struct stb0899_internal *internal = &state->internal;
1283         struct stb0899_config *config = state->config;
1284
1285         u32 bTrNomFreq, srate, decimRate, intval1, intval2, reg;
1286         int div1, div2, rem1, rem2;
1287
1288         div1 = config->btr_nco_bits / 2;
1289         div2 = config->btr_nco_bits - div1 - 1;
1290
1291         bTrNomFreq = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_NOM_FREQ);
1292
1293         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DECIM_CNTRL);
1294         decimRate = STB0899_GETFIELD(DECIM_RATE, reg);
1295         decimRate = (1 << decimRate);
1296
1297         intval1 = internal->master_clk / (1 << div1);
1298         intval2 = bTrNomFreq / (1 << div2);
1299
1300         rem1 = internal->master_clk % (1 << div1);
1301         rem2 = bTrNomFreq % (1 << div2);
1302         /* only for integer calculation */
1303         srate = (intval1 * intval2) + ((intval1 * rem2) / (1 << div2)) + ((intval2 * rem1) / (1 << div1));
1304         srate /= decimRate;     /*symbrate = (btrnomfreq_register_val*MasterClock)/2^(27+decim_rate_field) */
1305
1306         return  srate;
1307 }
1308
1309 /*
1310  * stb0899_dvbs2_algo
1311  * Search for signal, timing, carrier and data for a given
1312  * frequency in a given range
1313  */
1314 enum stb0899_status stb0899_dvbs2_algo(struct stb0899_state *state)
1315 {
1316         struct stb0899_internal *internal = &state->internal;
1317         enum stb0899_modcod modcod;
1318
1319         s32 offsetfreq, searchTime, FecLockTime, pilots, iqSpectrum;
1320         int i = 0;
1321         u32 reg, csm1;
1322
1323         if (internal->srate <= 2000000) {
1324                 searchTime      = 5000; /* 5000 ms max time to lock UWP and CSM, SYMB <= 2Mbs           */
1325                 FecLockTime     = 350;  /* 350  ms max time to lock FEC, SYMB <= 2Mbs                   */
1326         } else if (internal->srate <= 5000000) {
1327                 searchTime      = 2500; /* 2500 ms max time to lock UWP and CSM, 2Mbs < SYMB <= 5Mbs    */
1328                 FecLockTime     = 170;  /* 170  ms max time to lock FEC, 2Mbs< SYMB <= 5Mbs             */
1329         } else if (internal->srate <= 10000000) {
1330                 searchTime      = 1500; /* 1500 ms max time to lock UWP and CSM, 5Mbs <SYMB <= 10Mbs    */
1331                 FecLockTime     = 80;   /* 80  ms max time to lock FEC, 5Mbs< SYMB <= 10Mbs             */
1332         } else if (internal->srate <= 15000000) {
1333                 searchTime      = 500;  /* 500 ms max time to lock UWP and CSM, 10Mbs <SYMB <= 15Mbs    */
1334                 FecLockTime     = 50;   /* 50  ms max time to lock FEC, 10Mbs< SYMB <= 15Mbs            */
1335         } else if (internal->srate <= 20000000) {
1336                 searchTime      = 300;  /* 300 ms max time to lock UWP and CSM, 15Mbs < SYMB <= 20Mbs   */
1337                 FecLockTime     = 30;   /* 50  ms max time to lock FEC, 15Mbs< SYMB <= 20Mbs            */
1338         } else if (internal->srate <= 25000000) {
1339                 searchTime      = 250;  /* 250 ms max time to lock UWP and CSM, 20 Mbs < SYMB <= 25Mbs  */
1340                 FecLockTime     = 25;   /* 25 ms max time to lock FEC, 20Mbs< SYMB <= 25Mbs             */
1341         } else {
1342                 searchTime      = 150;  /* 150 ms max time to lock UWP and CSM, SYMB > 25Mbs            */
1343                 FecLockTime     = 20;   /* 20 ms max time to lock FEC, 20Mbs< SYMB <= 25Mbs             */
1344         }
1345
1346         /* Maintain Stream Merger in reset during acquisition   */
1347         reg = stb0899_read_reg(state, STB0899_TSTRES);
1348         STB0899_SETFIELD_VAL(FRESRS, reg, 1);
1349         stb0899_write_reg(state, STB0899_TSTRES, reg);
1350
1351         /* enable tuner I/O */
1352         stb0899_i2c_gate_ctrl(&state->frontend, 1);
1353
1354         /* Move tuner to frequency      */
1355         if (state->config->tuner_set_frequency)
1356                 state->config->tuner_set_frequency(&state->frontend, internal->freq);
1357         if (state->config->tuner_get_frequency)
1358                 state->config->tuner_get_frequency(&state->frontend, &internal->freq);
1359
1360         /* disable tuner I/O */
1361         stb0899_i2c_gate_ctrl(&state->frontend, 0);
1362
1363         /* Set IF AGC to acquisition    */
1364         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL);
1365         STB0899_SETFIELD_VAL(IF_LOOP_GAIN, reg,  4);
1366         STB0899_SETFIELD_VAL(IF_AGC_REF, reg, 32);
1367         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL, STB0899_OFF0_IF_AGC_CNTRL, reg);
1368
1369         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL2);
1370         STB0899_SETFIELD_VAL(IF_AGC_DUMP_PER, reg, 0);
1371         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL2, STB0899_OFF0_IF_AGC_CNTRL2, reg);
1372
1373         /* Initialisation       */
1374         stb0899_dvbs2_init_calc(state);
1375
1376         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_CNTRL2);
1377         switch (internal->inversion) {
1378         case IQ_SWAP_OFF:
1379                 STB0899_SETFIELD_VAL(SPECTRUM_INVERT, reg, 0);
1380                 break;
1381         case IQ_SWAP_ON:
1382                 STB0899_SETFIELD_VAL(SPECTRUM_INVERT, reg, 1);
1383                 break;
1384         }
1385         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_DMD_CNTRL2, STB0899_OFF0_DMD_CNTRL2, reg);
1386         stb0899_dvbs2_reacquire(state);
1387
1388         /* Wait for demod lock (UWP and CSM)    */
1389         internal->status = stb0899_dvbs2_get_dmd_status(state, searchTime);
1390
1391         if (internal->status == DVBS2_DEMOD_LOCK) {
1392                 dprintk(state->verbose, FE_DEBUG, 1, "------------> DVB-S2 DEMOD LOCK !");
1393                 i = 0;
1394                 /* Demod Locked, check FEC status       */
1395                 internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
1396
1397                 /*If false lock (UWP and CSM Locked but no FEC) try 3 time max*/
1398                 while ((internal->status != DVBS2_FEC_LOCK) && (i < 3)) {
1399                         /*      Read the frequency offset*/
1400                         offsetfreq = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_FREQ);
1401
1402                         /* Set the Nominal frequency to the found frequency offset for the next reacquire*/
1403                         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_NOM_FREQ);
1404                         STB0899_SETFIELD_VAL(CRL_NOM_FREQ, reg, offsetfreq);
1405                         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_NOM_FREQ, STB0899_OFF0_CRL_NOM_FREQ, reg);
1406                         stb0899_dvbs2_reacquire(state);
1407                         internal->status = stb0899_dvbs2_get_fec_status(state, searchTime);
1408                         i++;
1409                 }
1410         }
1411
1412         if (internal->status != DVBS2_FEC_LOCK) {
1413                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_CNTRL2);
1414                 iqSpectrum = STB0899_GETFIELD(SPECTRUM_INVERT, reg);
1415                 /* IQ Spectrum Inversion        */
1416                 STB0899_SETFIELD_VAL(SPECTRUM_INVERT, reg, !iqSpectrum);
1417                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_DMD_CNTRL2, STB0899_OFF0_DMD_CNTRL2, reg);
1418                 /* start acquistion process     */
1419                 stb0899_dvbs2_reacquire(state);
1420
1421                 /* Wait for demod lock (UWP and CSM)    */
1422                 internal->status = stb0899_dvbs2_get_dmd_status(state, searchTime);
1423                 if (internal->status == DVBS2_DEMOD_LOCK) {
1424                         i = 0;
1425                         /* Demod Locked, check FEC      */
1426                         internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
1427                         /*try thrice for false locks, (UWP and CSM Locked but no FEC)   */
1428                         while ((internal->status != DVBS2_FEC_LOCK) && (i < 3)) {
1429                                 /*      Read the frequency offset*/
1430                                 offsetfreq = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_FREQ);
1431
1432                                 /* Set the Nominal frequency to the found frequency offset for the next reacquire*/
1433                                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_NOM_FREQ);
1434                                 STB0899_SETFIELD_VAL(CRL_NOM_FREQ, reg, offsetfreq);
1435                                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_NOM_FREQ, STB0899_OFF0_CRL_NOM_FREQ, reg);
1436
1437                                 stb0899_dvbs2_reacquire(state);
1438                                 internal->status = stb0899_dvbs2_get_fec_status(state, searchTime);
1439                                 i++;
1440                         }
1441                 }
1442 /*
1443                 if (pParams->DVBS2State == FE_DVBS2_FEC_LOCKED)
1444                         pParams->IQLocked = !iqSpectrum;
1445 */
1446         }
1447         if (internal->status == DVBS2_FEC_LOCK) {
1448                 dprintk(state->verbose, FE_DEBUG, 1, "----------------> DVB-S2 FEC Lock !");
1449                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_STAT2);
1450                 modcod = STB0899_GETFIELD(UWP_DECODE_MOD, reg) >> 2;
1451                 pilots = STB0899_GETFIELD(UWP_DECODE_MOD, reg) & 0x01;
1452
1453                 if ((((10 * internal->master_clk) / (internal->srate / 10)) <= 410) &&
1454                       (INRANGE(STB0899_QPSK_23, modcod, STB0899_QPSK_910)) &&
1455                       (pilots == 1)) {
1456
1457                         stb0899_dvbs2_init_csm(state, pilots, modcod);
1458                         /* Wait for UWP,CSM and data LOCK 20ms max      */
1459                         internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
1460
1461                         i = 0;
1462                         while ((internal->status != DVBS2_FEC_LOCK) && (i < 3)) {
1463                                 csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
1464                                 STB0899_SETFIELD_VAL(CSM_TWO_PASS, csm1, 1);
1465                                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
1466                                 csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
1467                                 STB0899_SETFIELD_VAL(CSM_TWO_PASS, csm1, 0);
1468                                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
1469
1470                                 internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
1471                                 i++;
1472                         }
1473                 }
1474
1475                 if ((((10 * internal->master_clk) / (internal->srate / 10)) <= 410) &&
1476                       (INRANGE(STB0899_QPSK_12, modcod, STB0899_QPSK_35)) &&
1477                       (pilots == 1)) {
1478
1479                         /* Equalizer Disable update      */
1480                         reg = STB0899_READ_S2REG(STB0899_S2DEMOD, EQ_CNTRL);
1481                         STB0899_SETFIELD_VAL(EQ_DISABLE_UPDATE, reg, 1);
1482                         stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQ_CNTRL, STB0899_OFF0_EQ_CNTRL, reg);
1483                 }
1484
1485                 /* slow down the Equalizer once locked  */
1486                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, EQ_CNTRL);
1487                 STB0899_SETFIELD_VAL(EQ_SHIFT, reg, 0x02);
1488                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQ_CNTRL, STB0899_OFF0_EQ_CNTRL, reg);
1489
1490                 /* Store signal parameters      */
1491                 offsetfreq = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_FREQ);
1492
1493                 offsetfreq = sign_extend32(offsetfreq, 29);
1494
1495                 offsetfreq = offsetfreq / ((1 << 30) / 1000);
1496                 offsetfreq *= (internal->master_clk / 1000000);
1497
1498                 /* store current inversion for next run */
1499                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_CNTRL2);
1500                 if (STB0899_GETFIELD(SPECTRUM_INVERT, reg))
1501                         internal->inversion = IQ_SWAP_ON;
1502                 else
1503                         internal->inversion = IQ_SWAP_OFF;
1504
1505                 internal->freq = internal->freq + offsetfreq;
1506                 internal->srate = stb0899_dvbs2_get_srate(state);
1507
1508                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_STAT2);
1509                 internal->modcod = STB0899_GETFIELD(UWP_DECODE_MOD, reg) >> 2;
1510                 internal->pilots = STB0899_GETFIELD(UWP_DECODE_MOD, reg) & 0x01;
1511                 internal->frame_length = (STB0899_GETFIELD(UWP_DECODE_MOD, reg) >> 1) & 0x01;
1512
1513                  /* Set IF AGC to tracking      */
1514                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL);
1515                 STB0899_SETFIELD_VAL(IF_LOOP_GAIN, reg,  3);
1516
1517                 /* if QPSK 1/2,QPSK 3/5 or QPSK 2/3 set IF AGC reference to 16 otherwise 32*/
1518                 if (INRANGE(STB0899_QPSK_12, internal->modcod, STB0899_QPSK_23))
1519                         STB0899_SETFIELD_VAL(IF_AGC_REF, reg, 16);
1520
1521                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL, STB0899_OFF0_IF_AGC_CNTRL, reg);
1522
1523                 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL2);
1524                 STB0899_SETFIELD_VAL(IF_AGC_DUMP_PER, reg, 7);
1525                 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL2, STB0899_OFF0_IF_AGC_CNTRL2, reg);
1526         }
1527
1528         /* Release Stream Merger Reset          */
1529         reg = stb0899_read_reg(state, STB0899_TSTRES);
1530         STB0899_SETFIELD_VAL(FRESRS, reg, 0);
1531         stb0899_write_reg(state, STB0899_TSTRES, reg);
1532
1533         return internal->status;
1534 }