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 static 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 #if 0 35 /* These functions are currently unused */ 36 /* 37 * stb0899_calc_srate 38 * Compute symbol rate 39 */ 40 static u32 stb0899_calc_srate(u32 master_clk, u8 *sfr) 41 { 42 u64 tmp; 43 44 /* srate = (SFR * master_clk) >> 20 */ 45 46 /* sfr is of size 20 bit, stored with an offset of 4 bit */ 47 tmp = (((u32)sfr[0]) << 16) | (((u32)sfr[1]) << 8) | sfr[2]; 48 tmp &= ~0xf; 49 tmp *= master_clk; 50 tmp >>= 24; 51 52 return tmp; 53 } 54 55 /* 56 * stb0899_get_srate 57 * Get the current symbol rate 58 */ 59 static u32 stb0899_get_srate(struct stb0899_state *state) 60 { 61 struct stb0899_internal *internal = &state->internal; 62 u8 sfr[3]; 63 64 stb0899_read_regs(state, STB0899_SFRH, sfr, 3); 65 66 return stb0899_calc_srate(internal->master_clk, sfr); 67 } 68 #endif 69 70 /* 71 * stb0899_set_srate 72 * Set symbol frequency 73 * MasterClock: master clock frequency (hz) 74 * SymbolRate: symbol rate (bauds) 75 * return symbol frequency 76 */ 77 static u32 stb0899_set_srate(struct stb0899_state *state, u32 master_clk, u32 srate) 78 { 79 u32 tmp; 80 u8 sfr[3]; 81 82 dprintk(state->verbose, FE_DEBUG, 1, "-->"); 83 /* 84 * in order to have the maximum precision, the symbol rate entered into 85 * the chip is computed as the closest value of the "true value". 86 * In this purpose, the symbol rate value is rounded (1 is added on the bit 87 * below the LSB ) 88 * 89 * srate = (SFR * master_clk) >> 20 90 * <=> 91 * SFR = srate << 20 / master_clk 92 * 93 * rounded: 94 * SFR = (srate << 21 + master_clk) / (2 * master_clk) 95 * 96 * stored as 20 bit number with an offset of 4 bit: 97 * sfr = SFR << 4; 98 */ 99 100 tmp = stb0899_do_div((((u64)srate) << 21) + master_clk, 2 * master_clk); 101 tmp <<= 4; 102 103 sfr[0] = tmp >> 16; 104 sfr[1] = tmp >> 8; 105 sfr[2] = tmp; 106 107 stb0899_write_regs(state, STB0899_SFRH, sfr, 3); 108 109 return srate; 110 } 111 112 /* 113 * stb0899_calc_derot_time 114 * Compute the amount of time needed by the derotator to lock 115 * SymbolRate: Symbol rate 116 * return: derotator time constant (ms) 117 */ 118 static long stb0899_calc_derot_time(long srate) 119 { 120 if (srate > 0) 121 return (100000 / (srate / 1000)); 122 else 123 return 0; 124 } 125 126 /* 127 * stb0899_carr_width 128 * Compute the width of the carrier 129 * return: width of carrier (kHz or Mhz) 130 */ 131 long stb0899_carr_width(struct stb0899_state *state) 132 { 133 struct stb0899_internal *internal = &state->internal; 134 135 return (internal->srate + (internal->srate * internal->rolloff) / 100); 136 } 137 138 /* 139 * stb0899_first_subrange 140 * Compute the first subrange of the search 141 */ 142 static void stb0899_first_subrange(struct stb0899_state *state) 143 { 144 struct stb0899_internal *internal = &state->internal; 145 struct stb0899_params *params = &state->params; 146 struct stb0899_config *config = state->config; 147 148 int range = 0; 149 u32 bandwidth = 0; 150 151 if (config->tuner_get_bandwidth) { 152 stb0899_i2c_gate_ctrl(&state->frontend, 1); 153 config->tuner_get_bandwidth(&state->frontend, &bandwidth); 154 stb0899_i2c_gate_ctrl(&state->frontend, 0); 155 range = bandwidth - stb0899_carr_width(state) / 2; 156 } 157 158 if (range > 0) 159 internal->sub_range = min(internal->srch_range, range); 160 else 161 internal->sub_range = 0; 162 163 internal->freq = params->freq; 164 internal->tuner_offst = 0L; 165 internal->sub_dir = 1; 166 } 167 168 /* 169 * stb0899_check_tmg 170 * check for timing lock 171 * internal.Ttiming: time to wait for loop lock 172 */ 173 static enum stb0899_status stb0899_check_tmg(struct stb0899_state *state) 174 { 175 struct stb0899_internal *internal = &state->internal; 176 int lock; 177 u8 reg; 178 s8 timing; 179 180 msleep(internal->t_derot); 181 182 stb0899_write_reg(state, STB0899_RTF, 0xf2); 183 reg = stb0899_read_reg(state, STB0899_TLIR); 184 lock = STB0899_GETFIELD(TLIR_TMG_LOCK_IND, reg); 185 timing = stb0899_read_reg(state, STB0899_RTF); 186 187 if (lock >= 42) { 188 if ((lock > 48) && (abs(timing) >= 110)) { 189 internal->status = ANALOGCARRIER; 190 dprintk(state->verbose, FE_DEBUG, 1, "-->ANALOG Carrier !"); 191 } else { 192 internal->status = TIMINGOK; 193 dprintk(state->verbose, FE_DEBUG, 1, "------->TIMING OK !"); 194 } 195 } else { 196 internal->status = NOTIMING; 197 dprintk(state->verbose, FE_DEBUG, 1, "-->NO TIMING !"); 198 } 199 return internal->status; 200 } 201 202 /* 203 * stb0899_search_tmg 204 * perform a fs/2 zig-zag to find timing 205 */ 206 static enum stb0899_status stb0899_search_tmg(struct stb0899_state *state) 207 { 208 struct stb0899_internal *internal = &state->internal; 209 struct stb0899_params *params = &state->params; 210 211 short int derot_step, derot_freq = 0, derot_limit, next_loop = 3; 212 int index = 0; 213 u8 cfr[2]; 214 215 internal->status = NOTIMING; 216 217 /* timing loop computation & symbol rate optimisation */ 218 derot_limit = (internal->sub_range / 2L) / internal->mclk; 219 derot_step = (params->srate / 2L) / internal->mclk; 220 221 while ((stb0899_check_tmg(state) != TIMINGOK) && next_loop) { 222 index++; 223 derot_freq += index * internal->direction * derot_step; /* next derot zig zag position */ 224 225 if (abs(derot_freq) > derot_limit) 226 next_loop--; 227 228 if (next_loop) { 229 STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(internal->inversion * derot_freq)); 230 STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(internal->inversion * derot_freq)); 231 stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */ 232 } 233 internal->direction = -internal->direction; /* Change zigzag direction */ 234 } 235 236 if (internal->status == TIMINGOK) { 237 stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */ 238 internal->derot_freq = internal->inversion * MAKEWORD16(cfr[0], cfr[1]); 239 dprintk(state->verbose, FE_DEBUG, 1, "------->TIMING OK ! Derot Freq = %d", internal->derot_freq); 240 } 241 242 return internal->status; 243 } 244 245 /* 246 * stb0899_check_carrier 247 * Check for carrier found 248 */ 249 static enum stb0899_status stb0899_check_carrier(struct stb0899_state *state) 250 { 251 struct stb0899_internal *internal = &state->internal; 252 u8 reg; 253 254 msleep(internal->t_derot); /* wait for derotator ok */ 255 256 reg = stb0899_read_reg(state, STB0899_CFD); 257 STB0899_SETFIELD_VAL(CFD_ON, reg, 1); 258 stb0899_write_reg(state, STB0899_CFD, reg); 259 260 reg = stb0899_read_reg(state, STB0899_DSTATUS); 261 dprintk(state->verbose, FE_DEBUG, 1, "--------------------> STB0899_DSTATUS=[0x%02x]", reg); 262 if (STB0899_GETFIELD(CARRIER_FOUND, reg)) { 263 internal->status = CARRIEROK; 264 dprintk(state->verbose, FE_DEBUG, 1, "-------------> CARRIEROK !"); 265 } else { 266 internal->status = NOCARRIER; 267 dprintk(state->verbose, FE_DEBUG, 1, "-------------> NOCARRIER !"); 268 } 269 270 return internal->status; 271 } 272 273 /* 274 * stb0899_search_carrier 275 * Search for a QPSK carrier with the derotator 276 */ 277 static enum stb0899_status stb0899_search_carrier(struct stb0899_state *state) 278 { 279 struct stb0899_internal *internal = &state->internal; 280 281 short int derot_freq = 0, last_derot_freq = 0, derot_limit, next_loop = 3; 282 int index = 0; 283 u8 cfr[2]; 284 u8 reg; 285 286 internal->status = NOCARRIER; 287 derot_limit = (internal->sub_range / 2L) / internal->mclk; 288 derot_freq = internal->derot_freq; 289 290 reg = stb0899_read_reg(state, STB0899_CFD); 291 STB0899_SETFIELD_VAL(CFD_ON, reg, 1); 292 stb0899_write_reg(state, STB0899_CFD, reg); 293 294 do { 295 dprintk(state->verbose, FE_DEBUG, 1, "Derot Freq=%d, mclk=%d", derot_freq, internal->mclk); 296 if (stb0899_check_carrier(state) == NOCARRIER) { 297 index++; 298 last_derot_freq = derot_freq; 299 derot_freq += index * internal->direction * internal->derot_step; /* next zig zag derotator position */ 300 301 if(abs(derot_freq) > derot_limit) 302 next_loop--; 303 304 if (next_loop) { 305 reg = stb0899_read_reg(state, STB0899_CFD); 306 STB0899_SETFIELD_VAL(CFD_ON, reg, 1); 307 stb0899_write_reg(state, STB0899_CFD, reg); 308 309 STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(internal->inversion * derot_freq)); 310 STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(internal->inversion * derot_freq)); 311 stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */ 312 } 313 } 314 315 internal->direction = -internal->direction; /* Change zigzag direction */ 316 } while ((internal->status != CARRIEROK) && next_loop); 317 318 if (internal->status == CARRIEROK) { 319 stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */ 320 internal->derot_freq = internal->inversion * MAKEWORD16(cfr[0], cfr[1]); 321 dprintk(state->verbose, FE_DEBUG, 1, "----> CARRIER OK !, Derot Freq=%d", internal->derot_freq); 322 } else { 323 internal->derot_freq = last_derot_freq; 324 } 325 326 return internal->status; 327 } 328 329 /* 330 * stb0899_check_data 331 * Check for data found 332 */ 333 static enum stb0899_status stb0899_check_data(struct stb0899_state *state) 334 { 335 struct stb0899_internal *internal = &state->internal; 336 struct stb0899_params *params = &state->params; 337 338 int lock = 0, index = 0, dataTime = 500, loop; 339 u8 reg; 340 341 internal->status = NODATA; 342 343 /* RESET FEC */ 344 reg = stb0899_read_reg(state, STB0899_TSTRES); 345 STB0899_SETFIELD_VAL(FRESACS, reg, 1); 346 stb0899_write_reg(state, STB0899_TSTRES, reg); 347 msleep(1); 348 reg = stb0899_read_reg(state, STB0899_TSTRES); 349 STB0899_SETFIELD_VAL(FRESACS, reg, 0); 350 stb0899_write_reg(state, STB0899_TSTRES, reg); 351 352 if (params->srate <= 2000000) 353 dataTime = 2000; 354 else if (params->srate <= 5000000) 355 dataTime = 1500; 356 else if (params->srate <= 15000000) 357 dataTime = 1000; 358 else 359 dataTime = 500; 360 361 /* clear previous failed END_LOOPVIT */ 362 stb0899_read_reg(state, STB0899_VSTATUS); 363 364 stb0899_write_reg(state, STB0899_DSTATUS2, 0x00); /* force search loop */ 365 while (1) { 366 /* WARNING! VIT LOCKED has to be tested before VIT_END_LOOOP */ 367 reg = stb0899_read_reg(state, STB0899_VSTATUS); 368 lock = STB0899_GETFIELD(VSTATUS_LOCKEDVIT, reg); 369 loop = STB0899_GETFIELD(VSTATUS_END_LOOPVIT, reg); 370 371 if (lock || loop || (index > dataTime)) 372 break; 373 index++; 374 } 375 376 if (lock) { /* DATA LOCK indicator */ 377 internal->status = DATAOK; 378 dprintk(state->verbose, FE_DEBUG, 1, "-----------------> DATA OK !"); 379 } 380 381 return internal->status; 382 } 383 384 /* 385 * stb0899_search_data 386 * Search for a QPSK carrier with the derotator 387 */ 388 static enum stb0899_status stb0899_search_data(struct stb0899_state *state) 389 { 390 short int derot_freq, derot_step, derot_limit, next_loop = 3; 391 u8 cfr[2]; 392 u8 reg; 393 int index = 1; 394 395 struct stb0899_internal *internal = &state->internal; 396 struct stb0899_params *params = &state->params; 397 398 derot_step = (params->srate / 4L) / internal->mclk; 399 derot_limit = (internal->sub_range / 2L) / internal->mclk; 400 derot_freq = internal->derot_freq; 401 402 do { 403 if ((internal->status != CARRIEROK) || (stb0899_check_data(state) != DATAOK)) { 404 405 derot_freq += index * internal->direction * derot_step; /* next zig zag derotator position */ 406 if (abs(derot_freq) > derot_limit) 407 next_loop--; 408 409 if (next_loop) { 410 dprintk(state->verbose, FE_DEBUG, 1, "Derot freq=%d, mclk=%d", derot_freq, internal->mclk); 411 reg = stb0899_read_reg(state, STB0899_CFD); 412 STB0899_SETFIELD_VAL(CFD_ON, reg, 1); 413 stb0899_write_reg(state, STB0899_CFD, reg); 414 415 STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(internal->inversion * derot_freq)); 416 STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(internal->inversion * derot_freq)); 417 stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */ 418 419 stb0899_check_carrier(state); 420 index++; 421 } 422 } 423 internal->direction = -internal->direction; /* change zig zag direction */ 424 } while ((internal->status != DATAOK) && next_loop); 425 426 if (internal->status == DATAOK) { 427 stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */ 428 429 /* store autodetected IQ swapping as default for DVB-S2 tuning */ 430 reg = stb0899_read_reg(state, STB0899_IQSWAP); 431 if (STB0899_GETFIELD(SYM, reg)) 432 internal->inversion = IQ_SWAP_ON; 433 else 434 internal->inversion = IQ_SWAP_OFF; 435 436 internal->derot_freq = internal->inversion * MAKEWORD16(cfr[0], cfr[1]); 437 dprintk(state->verbose, FE_DEBUG, 1, "------> DATAOK ! Derot Freq=%d", internal->derot_freq); 438 } 439 440 return internal->status; 441 } 442 443 /* 444 * stb0899_check_range 445 * check if the found frequency is in the correct range 446 */ 447 static enum stb0899_status stb0899_check_range(struct stb0899_state *state) 448 { 449 struct stb0899_internal *internal = &state->internal; 450 struct stb0899_params *params = &state->params; 451 452 int range_offst, tp_freq; 453 454 range_offst = internal->srch_range / 2000; 455 tp_freq = internal->freq - (internal->derot_freq * internal->mclk) / 1000; 456 457 if ((tp_freq >= params->freq - range_offst) && (tp_freq <= params->freq + range_offst)) { 458 internal->status = RANGEOK; 459 dprintk(state->verbose, FE_DEBUG, 1, "----> RANGEOK !"); 460 } else { 461 internal->status = OUTOFRANGE; 462 dprintk(state->verbose, FE_DEBUG, 1, "----> OUT OF RANGE !"); 463 } 464 465 return internal->status; 466 } 467 468 /* 469 * NextSubRange 470 * Compute the next subrange of the search 471 */ 472 static void next_sub_range(struct stb0899_state *state) 473 { 474 struct stb0899_internal *internal = &state->internal; 475 struct stb0899_params *params = &state->params; 476 477 long old_sub_range; 478 479 if (internal->sub_dir > 0) { 480 old_sub_range = internal->sub_range; 481 internal->sub_range = min((internal->srch_range / 2) - 482 (internal->tuner_offst + internal->sub_range / 2), 483 internal->sub_range); 484 485 if (internal->sub_range < 0) 486 internal->sub_range = 0; 487 488 internal->tuner_offst += (old_sub_range + internal->sub_range) / 2; 489 } 490 491 internal->freq = params->freq + (internal->sub_dir * internal->tuner_offst) / 1000; 492 internal->sub_dir = -internal->sub_dir; 493 } 494 495 /* 496 * stb0899_dvbs_algo 497 * Search for a signal, timing, carrier and data for a 498 * given frequency in a given range 499 */ 500 enum stb0899_status stb0899_dvbs_algo(struct stb0899_state *state) 501 { 502 struct stb0899_params *params = &state->params; 503 struct stb0899_internal *internal = &state->internal; 504 struct stb0899_config *config = state->config; 505 506 u8 bclc, reg; 507 u8 cfr[2]; 508 u8 eq_const[10]; 509 s32 clnI = 3; 510 u32 bandwidth = 0; 511 512 /* BETA values rated @ 99MHz */ 513 s32 betaTab[5][4] = { 514 /* 5 10 20 30MBps */ 515 { 37, 34, 32, 31 }, /* QPSK 1/2 */ 516 { 37, 35, 33, 31 }, /* QPSK 2/3 */ 517 { 37, 35, 33, 31 }, /* QPSK 3/4 */ 518 { 37, 36, 33, 32 }, /* QPSK 5/6 */ 519 { 37, 36, 33, 32 } /* QPSK 7/8 */ 520 }; 521 522 internal->direction = 1; 523 524 stb0899_set_srate(state, internal->master_clk, params->srate); 525 /* Carrier loop optimization versus symbol rate for acquisition*/ 526 if (params->srate <= 5000000) { 527 stb0899_write_reg(state, STB0899_ACLC, 0x89); 528 bclc = stb0899_read_reg(state, STB0899_BCLC); 529 STB0899_SETFIELD_VAL(BETA, bclc, 0x1c); 530 stb0899_write_reg(state, STB0899_BCLC, bclc); 531 clnI = 0; 532 } else if (params->srate <= 15000000) { 533 stb0899_write_reg(state, STB0899_ACLC, 0xc9); 534 bclc = stb0899_read_reg(state, STB0899_BCLC); 535 STB0899_SETFIELD_VAL(BETA, bclc, 0x22); 536 stb0899_write_reg(state, STB0899_BCLC, bclc); 537 clnI = 1; 538 } else if(params->srate <= 25000000) { 539 stb0899_write_reg(state, STB0899_ACLC, 0x89); 540 bclc = stb0899_read_reg(state, STB0899_BCLC); 541 STB0899_SETFIELD_VAL(BETA, bclc, 0x27); 542 stb0899_write_reg(state, STB0899_BCLC, bclc); 543 clnI = 2; 544 } else { 545 stb0899_write_reg(state, STB0899_ACLC, 0xc8); 546 bclc = stb0899_read_reg(state, STB0899_BCLC); 547 STB0899_SETFIELD_VAL(BETA, bclc, 0x29); 548 stb0899_write_reg(state, STB0899_BCLC, bclc); 549 clnI = 3; 550 } 551 552 dprintk(state->verbose, FE_DEBUG, 1, "Set the timing loop to acquisition"); 553 /* Set the timing loop to acquisition */ 554 stb0899_write_reg(state, STB0899_RTC, 0x46); 555 stb0899_write_reg(state, STB0899_CFD, 0xee); 556 557 /* !! WARNING !! 558 * Do not read any status variables while acquisition, 559 * If any needed, read before the acquisition starts 560 * querying status while acquiring causes the 561 * acquisition to go bad and hence no locks. 562 */ 563 dprintk(state->verbose, FE_DEBUG, 1, "Derot Percent=%d Srate=%d mclk=%d", 564 internal->derot_percent, params->srate, internal->mclk); 565 566 /* Initial calculations */ 567 internal->derot_step = internal->derot_percent * (params->srate / 1000L) / internal->mclk; /* DerotStep/1000 * Fsymbol */ 568 internal->t_derot = stb0899_calc_derot_time(params->srate); 569 internal->t_data = 500; 570 571 dprintk(state->verbose, FE_DEBUG, 1, "RESET stream merger"); 572 /* RESET Stream merger */ 573 reg = stb0899_read_reg(state, STB0899_TSTRES); 574 STB0899_SETFIELD_VAL(FRESRS, reg, 1); 575 stb0899_write_reg(state, STB0899_TSTRES, reg); 576 577 /* 578 * Set KDIVIDER to an intermediate value between 579 * 1/2 and 7/8 for acquisition 580 */ 581 reg = stb0899_read_reg(state, STB0899_DEMAPVIT); 582 STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 60); 583 stb0899_write_reg(state, STB0899_DEMAPVIT, reg); 584 585 stb0899_write_reg(state, STB0899_EQON, 0x01); /* Equalizer OFF while acquiring */ 586 stb0899_write_reg(state, STB0899_VITSYNC, 0x19); 587 588 stb0899_first_subrange(state); 589 do { 590 /* Initialisations */ 591 cfr[0] = cfr[1] = 0; 592 stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* RESET derotator frequency */ 593 594 stb0899_write_reg(state, STB0899_RTF, 0); 595 reg = stb0899_read_reg(state, STB0899_CFD); 596 STB0899_SETFIELD_VAL(CFD_ON, reg, 1); 597 stb0899_write_reg(state, STB0899_CFD, reg); 598 599 internal->derot_freq = 0; 600 internal->status = NOAGC1; 601 602 /* enable tuner I/O */ 603 stb0899_i2c_gate_ctrl(&state->frontend, 1); 604 605 /* Move tuner to frequency */ 606 dprintk(state->verbose, FE_DEBUG, 1, "Tuner set frequency"); 607 if (state->config->tuner_set_frequency) 608 state->config->tuner_set_frequency(&state->frontend, internal->freq); 609 610 if (state->config->tuner_get_frequency) 611 state->config->tuner_get_frequency(&state->frontend, &internal->freq); 612 613 msleep(internal->t_agc1 + internal->t_agc2 + internal->t_derot); /* AGC1, AGC2 and timing loop */ 614 dprintk(state->verbose, FE_DEBUG, 1, "current derot freq=%d", internal->derot_freq); 615 internal->status = AGC1OK; 616 617 /* There is signal in the band */ 618 if (config->tuner_get_bandwidth) 619 config->tuner_get_bandwidth(&state->frontend, &bandwidth); 620 621 /* disable tuner I/O */ 622 stb0899_i2c_gate_ctrl(&state->frontend, 0); 623 624 if (params->srate <= bandwidth / 2) 625 stb0899_search_tmg(state); /* For low rates (SCPC) */ 626 else 627 stb0899_check_tmg(state); /* For high rates (MCPC) */ 628 629 if (internal->status == TIMINGOK) { 630 dprintk(state->verbose, FE_DEBUG, 1, 631 "TIMING OK ! Derot freq=%d, mclk=%d", 632 internal->derot_freq, internal->mclk); 633 634 if (stb0899_search_carrier(state) == CARRIEROK) { /* Search for carrier */ 635 dprintk(state->verbose, FE_DEBUG, 1, 636 "CARRIER OK ! Derot freq=%d, mclk=%d", 637 internal->derot_freq, internal->mclk); 638 639 if (stb0899_search_data(state) == DATAOK) { /* Check for data */ 640 dprintk(state->verbose, FE_DEBUG, 1, 641 "DATA OK ! Derot freq=%d, mclk=%d", 642 internal->derot_freq, internal->mclk); 643 644 if (stb0899_check_range(state) == RANGEOK) { 645 dprintk(state->verbose, FE_DEBUG, 1, 646 "RANGE OK ! derot freq=%d, mclk=%d", 647 internal->derot_freq, internal->mclk); 648 649 internal->freq = params->freq - ((internal->derot_freq * internal->mclk) / 1000); 650 reg = stb0899_read_reg(state, STB0899_PLPARM); 651 internal->fecrate = STB0899_GETFIELD(VITCURPUN, reg); 652 dprintk(state->verbose, FE_DEBUG, 1, 653 "freq=%d, internal resultant freq=%d", 654 params->freq, internal->freq); 655 656 dprintk(state->verbose, FE_DEBUG, 1, 657 "internal puncture rate=%d", 658 internal->fecrate); 659 } 660 } 661 } 662 } 663 if (internal->status != RANGEOK) 664 next_sub_range(state); 665 666 } while (internal->sub_range && internal->status != RANGEOK); 667 668 /* Set the timing loop to tracking */ 669 stb0899_write_reg(state, STB0899_RTC, 0x33); 670 stb0899_write_reg(state, STB0899_CFD, 0xf7); 671 /* if locked and range ok, set Kdiv */ 672 if (internal->status == RANGEOK) { 673 dprintk(state->verbose, FE_DEBUG, 1, "Locked & Range OK !"); 674 stb0899_write_reg(state, STB0899_EQON, 0x41); /* Equalizer OFF while acquiring */ 675 stb0899_write_reg(state, STB0899_VITSYNC, 0x39); /* SN to b'11 for acquisition */ 676 677 /* 678 * Carrier loop optimization versus 679 * symbol Rate/Puncture Rate for Tracking 680 */ 681 reg = stb0899_read_reg(state, STB0899_BCLC); 682 switch (internal->fecrate) { 683 case STB0899_FEC_1_2: /* 13 */ 684 stb0899_write_reg(state, STB0899_DEMAPVIT, 0x1a); 685 STB0899_SETFIELD_VAL(BETA, reg, betaTab[0][clnI]); 686 stb0899_write_reg(state, STB0899_BCLC, reg); 687 break; 688 case STB0899_FEC_2_3: /* 18 */ 689 stb0899_write_reg(state, STB0899_DEMAPVIT, 44); 690 STB0899_SETFIELD_VAL(BETA, reg, betaTab[1][clnI]); 691 stb0899_write_reg(state, STB0899_BCLC, reg); 692 break; 693 case STB0899_FEC_3_4: /* 21 */ 694 stb0899_write_reg(state, STB0899_DEMAPVIT, 60); 695 STB0899_SETFIELD_VAL(BETA, reg, betaTab[2][clnI]); 696 stb0899_write_reg(state, STB0899_BCLC, reg); 697 break; 698 case STB0899_FEC_5_6: /* 24 */ 699 stb0899_write_reg(state, STB0899_DEMAPVIT, 75); 700 STB0899_SETFIELD_VAL(BETA, reg, betaTab[3][clnI]); 701 stb0899_write_reg(state, STB0899_BCLC, reg); 702 break; 703 case STB0899_FEC_6_7: /* 25 */ 704 stb0899_write_reg(state, STB0899_DEMAPVIT, 88); 705 stb0899_write_reg(state, STB0899_ACLC, 0x88); 706 stb0899_write_reg(state, STB0899_BCLC, 0x9a); 707 break; 708 case STB0899_FEC_7_8: /* 26 */ 709 stb0899_write_reg(state, STB0899_DEMAPVIT, 94); 710 STB0899_SETFIELD_VAL(BETA, reg, betaTab[4][clnI]); 711 stb0899_write_reg(state, STB0899_BCLC, reg); 712 break; 713 default: 714 dprintk(state->verbose, FE_DEBUG, 1, "Unsupported Puncture Rate"); 715 break; 716 } 717 /* release stream merger RESET */ 718 reg = stb0899_read_reg(state, STB0899_TSTRES); 719 STB0899_SETFIELD_VAL(FRESRS, reg, 0); 720 stb0899_write_reg(state, STB0899_TSTRES, reg); 721 722 /* disable carrier detector */ 723 reg = stb0899_read_reg(state, STB0899_CFD); 724 STB0899_SETFIELD_VAL(CFD_ON, reg, 0); 725 stb0899_write_reg(state, STB0899_CFD, reg); 726 727 stb0899_read_regs(state, STB0899_EQUAI1, eq_const, 10); 728 } 729 730 return internal->status; 731 } 732 733 /* 734 * stb0899_dvbs2_config_uwp 735 * Configure UWP state machine 736 */ 737 static void stb0899_dvbs2_config_uwp(struct stb0899_state *state) 738 { 739 struct stb0899_internal *internal = &state->internal; 740 struct stb0899_config *config = state->config; 741 u32 uwp1, uwp2, uwp3, reg; 742 743 uwp1 = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_CNTRL1); 744 uwp2 = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_CNTRL2); 745 uwp3 = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_CNTRL3); 746 747 STB0899_SETFIELD_VAL(UWP_ESN0_AVE, uwp1, config->esno_ave); 748 STB0899_SETFIELD_VAL(UWP_ESN0_QUANT, uwp1, config->esno_quant); 749 STB0899_SETFIELD_VAL(UWP_TH_SOF, uwp1, config->uwp_threshold_sof); 750 751 STB0899_SETFIELD_VAL(FE_COARSE_TRK, uwp2, internal->av_frame_coarse); 752 STB0899_SETFIELD_VAL(FE_FINE_TRK, uwp2, internal->av_frame_fine); 753 STB0899_SETFIELD_VAL(UWP_MISS_TH, uwp2, config->miss_threshold); 754 755 STB0899_SETFIELD_VAL(UWP_TH_ACQ, uwp3, config->uwp_threshold_acq); 756 STB0899_SETFIELD_VAL(UWP_TH_TRACK, uwp3, config->uwp_threshold_track); 757 758 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_UWP_CNTRL1, STB0899_OFF0_UWP_CNTRL1, uwp1); 759 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_UWP_CNTRL2, STB0899_OFF0_UWP_CNTRL2, uwp2); 760 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_UWP_CNTRL3, STB0899_OFF0_UWP_CNTRL3, uwp3); 761 762 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, SOF_SRCH_TO); 763 STB0899_SETFIELD_VAL(SOF_SEARCH_TIMEOUT, reg, config->sof_search_timeout); 764 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_SOF_SRCH_TO, STB0899_OFF0_SOF_SRCH_TO, reg); 765 } 766 767 /* 768 * stb0899_dvbs2_config_csm_auto 769 * Set CSM to AUTO mode 770 */ 771 static void stb0899_dvbs2_config_csm_auto(struct stb0899_state *state) 772 { 773 u32 reg; 774 775 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1); 776 STB0899_SETFIELD_VAL(CSM_AUTO_PARAM, reg, 1); 777 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, reg); 778 } 779 780 static long Log2Int(int number) 781 { 782 int i; 783 784 i = 0; 785 while ((1 << i) <= abs(number)) 786 i++; 787 788 if (number == 0) 789 i = 1; 790 791 return i - 1; 792 } 793 794 /* 795 * stb0899_dvbs2_calc_srate 796 * compute BTR_NOM_FREQ for the symbol rate 797 */ 798 static u32 stb0899_dvbs2_calc_srate(struct stb0899_state *state) 799 { 800 struct stb0899_internal *internal = &state->internal; 801 struct stb0899_config *config = state->config; 802 803 u32 dec_ratio, dec_rate, decim, remain, intval, btr_nom_freq; 804 u32 master_clk, srate; 805 806 dec_ratio = (internal->master_clk * 2) / (5 * internal->srate); 807 dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio; 808 dec_rate = Log2Int(dec_ratio); 809 decim = 1 << dec_rate; 810 master_clk = internal->master_clk / 1000; 811 srate = internal->srate / 1000; 812 813 if (decim <= 4) { 814 intval = (decim * (1 << (config->btr_nco_bits - 1))) / master_clk; 815 remain = (decim * (1 << (config->btr_nco_bits - 1))) % master_clk; 816 } else { 817 intval = (1 << (config->btr_nco_bits - 1)) / (master_clk / 100) * decim / 100; 818 remain = (decim * (1 << (config->btr_nco_bits - 1))) % master_clk; 819 } 820 btr_nom_freq = (intval * srate) + ((remain * srate) / master_clk); 821 822 return btr_nom_freq; 823 } 824 825 /* 826 * stb0899_dvbs2_calc_dev 827 * compute the correction to be applied to symbol rate 828 */ 829 static u32 stb0899_dvbs2_calc_dev(struct stb0899_state *state) 830 { 831 struct stb0899_internal *internal = &state->internal; 832 u32 dec_ratio, correction, master_clk, srate; 833 834 dec_ratio = (internal->master_clk * 2) / (5 * internal->srate); 835 dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio; 836 837 master_clk = internal->master_clk / 1000; /* for integer Caculation*/ 838 srate = internal->srate / 1000; /* for integer Caculation*/ 839 correction = (512 * master_clk) / (2 * dec_ratio * srate); 840 841 return correction; 842 } 843 844 /* 845 * stb0899_dvbs2_set_srate 846 * Set DVBS2 symbol rate 847 */ 848 static void stb0899_dvbs2_set_srate(struct stb0899_state *state) 849 { 850 struct stb0899_internal *internal = &state->internal; 851 852 u32 dec_ratio, dec_rate, win_sel, decim, f_sym, btr_nom_freq; 853 u32 correction, freq_adj, band_lim, decim_cntrl, reg; 854 u8 anti_alias; 855 856 /*set decimation to 1*/ 857 dec_ratio = (internal->master_clk * 2) / (5 * internal->srate); 858 dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio; 859 dec_rate = Log2Int(dec_ratio); 860 861 win_sel = 0; 862 if (dec_rate >= 5) 863 win_sel = dec_rate - 4; 864 865 decim = (1 << dec_rate); 866 /* (FSamp/Fsymbol *100) for integer Caculation */ 867 f_sym = internal->master_clk / ((decim * internal->srate) / 1000); 868 869 if (f_sym <= 2250) /* don't band limit signal going into btr block*/ 870 band_lim = 1; 871 else 872 band_lim = 0; /* band limit signal going into btr block*/ 873 874 decim_cntrl = ((win_sel << 3) & 0x18) + ((band_lim << 5) & 0x20) + (dec_rate & 0x7); 875 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_DECIM_CNTRL, STB0899_OFF0_DECIM_CNTRL, decim_cntrl); 876 877 if (f_sym <= 3450) 878 anti_alias = 0; 879 else if (f_sym <= 4250) 880 anti_alias = 1; 881 else 882 anti_alias = 2; 883 884 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_ANTI_ALIAS_SEL, STB0899_OFF0_ANTI_ALIAS_SEL, anti_alias); 885 btr_nom_freq = stb0899_dvbs2_calc_srate(state); 886 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_NOM_FREQ, STB0899_OFF0_BTR_NOM_FREQ, btr_nom_freq); 887 888 correction = stb0899_dvbs2_calc_dev(state); 889 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_CNTRL); 890 STB0899_SETFIELD_VAL(BTR_FREQ_CORR, reg, correction); 891 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_CNTRL, STB0899_OFF0_BTR_CNTRL, reg); 892 893 /* scale UWP+CSM frequency to sample rate*/ 894 freq_adj = internal->srate / (internal->master_clk / 4096); 895 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_FREQ_ADJ_SCALE, STB0899_OFF0_FREQ_ADJ_SCALE, freq_adj); 896 } 897 898 /* 899 * stb0899_dvbs2_set_btr_loopbw 900 * set bit timing loop bandwidth as a percentage of the symbol rate 901 */ 902 static void stb0899_dvbs2_set_btr_loopbw(struct stb0899_state *state) 903 { 904 struct stb0899_internal *internal = &state->internal; 905 struct stb0899_config *config = state->config; 906 907 u32 sym_peak = 23, zeta = 707, loopbw_percent = 60; 908 s32 dec_ratio, dec_rate, k_btr1_rshft, k_btr1, k_btr0_rshft; 909 s32 k_btr0, k_btr2_rshft, k_direct_shift, k_indirect_shift; 910 u32 decim, K, wn, k_direct, k_indirect; 911 u32 reg; 912 913 dec_ratio = (internal->master_clk * 2) / (5 * internal->srate); 914 dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio; 915 dec_rate = Log2Int(dec_ratio); 916 decim = (1 << dec_rate); 917 918 sym_peak *= 576000; 919 K = (1 << config->btr_nco_bits) / (internal->master_clk / 1000); 920 K *= (internal->srate / 1000000) * decim; /*k=k 10^-8*/ 921 922 if (K != 0) { 923 K = sym_peak / K; 924 wn = (4 * zeta * zeta) + 1000000; 925 wn = (2 * (loopbw_percent * 1000) * 40 * zeta) /wn; /*wn =wn 10^-8*/ 926 927 k_indirect = (wn * wn) / K; 928 k_indirect = k_indirect; /*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 /* sign extend 30 bit value before using it in calculations */ 1494 if (offsetfreq & (1 << 29)) 1495 offsetfreq |= -1 << 30; 1496 1497 offsetfreq = offsetfreq / ((1 << 30) / 1000); 1498 offsetfreq *= (internal->master_clk / 1000000); 1499 1500 /* store current inversion for next run */ 1501 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_CNTRL2); 1502 if (STB0899_GETFIELD(SPECTRUM_INVERT, reg)) 1503 internal->inversion = IQ_SWAP_ON; 1504 else 1505 internal->inversion = IQ_SWAP_OFF; 1506 1507 internal->freq = internal->freq + offsetfreq; 1508 internal->srate = stb0899_dvbs2_get_srate(state); 1509 1510 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_STAT2); 1511 internal->modcod = STB0899_GETFIELD(UWP_DECODE_MOD, reg) >> 2; 1512 internal->pilots = STB0899_GETFIELD(UWP_DECODE_MOD, reg) & 0x01; 1513 internal->frame_length = (STB0899_GETFIELD(UWP_DECODE_MOD, reg) >> 1) & 0x01; 1514 1515 /* Set IF AGC to tracking */ 1516 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL); 1517 STB0899_SETFIELD_VAL(IF_LOOP_GAIN, reg, 3); 1518 1519 /* if QPSK 1/2,QPSK 3/5 or QPSK 2/3 set IF AGC reference to 16 otherwise 32*/ 1520 if (INRANGE(STB0899_QPSK_12, internal->modcod, STB0899_QPSK_23)) 1521 STB0899_SETFIELD_VAL(IF_AGC_REF, reg, 16); 1522 1523 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL, STB0899_OFF0_IF_AGC_CNTRL, reg); 1524 1525 reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL2); 1526 STB0899_SETFIELD_VAL(IF_AGC_DUMP_PER, reg, 7); 1527 stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL2, STB0899_OFF0_IF_AGC_CNTRL2, reg); 1528 } 1529 1530 /* Release Stream Merger Reset */ 1531 reg = stb0899_read_reg(state, STB0899_TSTRES); 1532 STB0899_SETFIELD_VAL(FRESRS, reg, 0); 1533 stb0899_write_reg(state, STB0899_TSTRES, reg); 1534 1535 return internal->status; 1536 } 1537