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