diff options
Diffstat (limited to 'drivers/media/dvb/frontends/stb0899_algo.c')
| -rw-r--r-- | drivers/media/dvb/frontends/stb0899_algo.c | 1519 |
1 files changed, 1519 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/stb0899_algo.c b/drivers/media/dvb/frontends/stb0899_algo.c new file mode 100644 index 00000000000..ced9b7ae7d5 --- /dev/null +++ b/drivers/media/dvb/frontends/stb0899_algo.c @@ -0,0 +1,1519 @@ +/* + STB0899 Multistandard Frontend driver + Copyright (C) Manu Abraham (abraham.manu@gmail.com) + + Copyright (C) ST Microelectronics + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "stb0899_drv.h" +#include "stb0899_priv.h" +#include "stb0899_reg.h" + +inline u32 stb0899_do_div(u64 n, u32 d) +{ + /* wrap do_div() for ease of use */ + + do_div(n, d); + return n; +} + +/* + * stb0899_calc_srate + * Compute symbol rate + */ +static u32 stb0899_calc_srate(u32 master_clk, u8 *sfr) +{ + u64 tmp; + + /* srate = (SFR * master_clk) >> 20 */ + + /* sfr is of size 20 bit, stored with an offset of 4 bit */ + tmp = (((u32)sfr[0]) << 16) | (((u32)sfr[1]) << 8) | sfr[2]; + tmp &= ~0xf; + tmp *= master_clk; + tmp >>= 24; + + return tmp; +} + +/* + * stb0899_get_srate + * Get the current symbol rate + */ +u32 stb0899_get_srate(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + u8 sfr[3]; + + stb0899_read_regs(state, STB0899_SFRH, sfr, 3); + + return stb0899_calc_srate(internal->master_clk, sfr); +} + +/* + * stb0899_set_srate + * Set symbol frequency + * MasterClock: master clock frequency (hz) + * SymbolRate: symbol rate (bauds) + * return symbol frequency + */ +static u32 stb0899_set_srate(struct stb0899_state *state, u32 master_clk, u32 srate) +{ + u32 tmp; + u8 sfr[3]; + + dprintk(state->verbose, FE_DEBUG, 1, "-->"); + /* + * in order to have the maximum precision, the symbol rate entered into + * the chip is computed as the closest value of the "true value". + * In this purpose, the symbol rate value is rounded (1 is added on the bit + * below the LSB ) + * + * srate = (SFR * master_clk) >> 20 + * <=> + * SFR = srate << 20 / master_clk + * + * rounded: + * SFR = (srate << 21 + master_clk) / (2 * master_clk) + * + * stored as 20 bit number with an offset of 4 bit: + * sfr = SFR << 4; + */ + + tmp = stb0899_do_div((((u64)srate) << 21) + master_clk, 2 * master_clk); + tmp <<= 4; + + sfr[0] = tmp >> 16; + sfr[1] = tmp >> 8; + sfr[2] = tmp; + + stb0899_write_regs(state, STB0899_SFRH, sfr, 3); + + return srate; +} + +/* + * stb0899_calc_derot_time + * Compute the amount of time needed by the derotator to lock + * SymbolRate: Symbol rate + * return: derotator time constant (ms) + */ +static long stb0899_calc_derot_time(long srate) +{ + if (srate > 0) + return (100000 / (srate / 1000)); + else + return 0; +} + +/* + * stb0899_carr_width + * Compute the width of the carrier + * return: width of carrier (kHz or Mhz) + */ +long stb0899_carr_width(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + + return (internal->srate + (internal->srate * internal->rolloff) / 100); +} + +/* + * stb0899_first_subrange + * Compute the first subrange of the search + */ +static void stb0899_first_subrange(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + struct stb0899_params *params = &state->params; + struct stb0899_config *config = state->config; + + int range = 0; + u32 bandwidth = 0; + + if (config->tuner_get_bandwidth) { + stb0899_i2c_gate_ctrl(&state->frontend, 1); + config->tuner_get_bandwidth(&state->frontend, &bandwidth); + stb0899_i2c_gate_ctrl(&state->frontend, 0); + range = bandwidth - stb0899_carr_width(state) / 2; + } + + if (range > 0) + internal->sub_range = MIN(internal->srch_range, range); + else + internal->sub_range = 0; + + internal->freq = params->freq; + internal->tuner_offst = 0L; + internal->sub_dir = 1; +} + +/* + * stb0899_check_tmg + * check for timing lock + * internal.Ttiming: time to wait for loop lock + */ +static enum stb0899_status stb0899_check_tmg(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + int lock; + u8 reg; + s8 timing; + + msleep(internal->t_derot); + + stb0899_write_reg(state, STB0899_RTF, 0xf2); + reg = stb0899_read_reg(state, STB0899_TLIR); + lock = STB0899_GETFIELD(TLIR_TMG_LOCK_IND, reg); + timing = stb0899_read_reg(state, STB0899_RTF); + + if (lock >= 42) { + if ((lock > 48) && (ABS(timing) >= 110)) { + internal->status = ANALOGCARRIER; + dprintk(state->verbose, FE_DEBUG, 1, "-->ANALOG Carrier !"); + } else { + internal->status = TIMINGOK; + dprintk(state->verbose, FE_DEBUG, 1, "------->TIMING OK !"); + } + } else { + internal->status = NOTIMING; + dprintk(state->verbose, FE_DEBUG, 1, "-->NO TIMING !"); + } + return internal->status; +} + +/* + * stb0899_search_tmg + * perform a fs/2 zig-zag to find timing + */ +static enum stb0899_status stb0899_search_tmg(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + struct stb0899_params *params = &state->params; + + short int derot_step, derot_freq = 0, derot_limit, next_loop = 3; + int index = 0; + u8 cfr[2]; + + internal->status = NOTIMING; + + /* timing loop computation & symbol rate optimisation */ + derot_limit = (internal->sub_range / 2L) / internal->mclk; + derot_step = (params->srate / 2L) / internal->mclk; + + while ((stb0899_check_tmg(state) != TIMINGOK) && next_loop) { + index++; + derot_freq += index * internal->direction * derot_step; /* next derot zig zag position */ + + if (ABS(derot_freq) > derot_limit) + next_loop--; + + if (next_loop) { + STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(state->config->inversion * derot_freq)); + STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(state->config->inversion * derot_freq)); + stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */ + } + internal->direction = -internal->direction; /* Change zigzag direction */ + } + + if (internal->status == TIMINGOK) { + stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */ + internal->derot_freq = state->config->inversion * MAKEWORD16(cfr[0], cfr[1]); + dprintk(state->verbose, FE_DEBUG, 1, "------->TIMING OK ! Derot Freq = %d", internal->derot_freq); + } + + return internal->status; +} + +/* + * stb0899_check_carrier + * Check for carrier found + */ +static enum stb0899_status stb0899_check_carrier(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + u8 reg; + + msleep(internal->t_derot); /* wait for derotator ok */ + + reg = stb0899_read_reg(state, STB0899_CFD); + STB0899_SETFIELD_VAL(CFD_ON, reg, 1); + stb0899_write_reg(state, STB0899_CFD, reg); + + reg = stb0899_read_reg(state, STB0899_DSTATUS); + dprintk(state->verbose, FE_DEBUG, 1, "--------------------> STB0899_DSTATUS=[0x%02x]", reg); + if (STB0899_GETFIELD(CARRIER_FOUND, reg)) { + internal->status = CARRIEROK; + dprintk(state->verbose, FE_DEBUG, 1, "-------------> CARRIEROK !"); + } else { + internal->status = NOCARRIER; + dprintk(state->verbose, FE_DEBUG, 1, "-------------> NOCARRIER !"); + } + + return internal->status; +} + +/* + * stb0899_search_carrier + * Search for a QPSK carrier with the derotator + */ +static enum stb0899_status stb0899_search_carrier(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + + short int derot_freq = 0, last_derot_freq = 0, derot_limit, next_loop = 3; + int index = 0; + u8 cfr[2]; + u8 reg; + + internal->status = NOCARRIER; + derot_limit = (internal->sub_range / 2L) / internal->mclk; + derot_freq = internal->derot_freq; + + reg = stb0899_read_reg(state, STB0899_CFD); + STB0899_SETFIELD_VAL(CFD_ON, reg, 1); + stb0899_write_reg(state, STB0899_CFD, reg); + + do { + dprintk(state->verbose, FE_DEBUG, 1, "Derot Freq=%d, mclk=%d", derot_freq, internal->mclk); + if (stb0899_check_carrier(state) == NOCARRIER) { + index++; + last_derot_freq = derot_freq; + derot_freq += index * internal->direction * internal->derot_step; /* next zig zag derotator position */ + + if(ABS(derot_freq) > derot_limit) + next_loop--; + + if (next_loop) { + reg = stb0899_read_reg(state, STB0899_CFD); + STB0899_SETFIELD_VAL(CFD_ON, reg, 1); + stb0899_write_reg(state, STB0899_CFD, reg); + + STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(state->config->inversion * derot_freq)); + STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(state->config->inversion * derot_freq)); + stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */ + } + } + + internal->direction = -internal->direction; /* Change zigzag direction */ + } while ((internal->status != CARRIEROK) && next_loop); + + if (internal->status == CARRIEROK) { + stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */ + internal->derot_freq = state->config->inversion * MAKEWORD16(cfr[0], cfr[1]); + dprintk(state->verbose, FE_DEBUG, 1, "----> CARRIER OK !, Derot Freq=%d", internal->derot_freq); + } else { + internal->derot_freq = last_derot_freq; + } + + return internal->status; +} + +/* + * stb0899_check_data + * Check for data found + */ +static enum stb0899_status stb0899_check_data(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + struct stb0899_params *params = &state->params; + + int lock = 0, index = 0, dataTime = 500, loop; + u8 reg; + + internal->status = NODATA; + + /* RESET FEC */ + reg = stb0899_read_reg(state, STB0899_TSTRES); + STB0899_SETFIELD_VAL(FRESACS, reg, 1); + stb0899_write_reg(state, STB0899_TSTRES, reg); + msleep(1); + reg = stb0899_read_reg(state, STB0899_TSTRES); + STB0899_SETFIELD_VAL(FRESACS, reg, 0); + stb0899_write_reg(state, STB0899_TSTRES, reg); + + if (params->srate <= 2000000) + dataTime = 2000; + else if (params->srate <= 5000000) + dataTime = 1500; + else if (params->srate <= 15000000) + dataTime = 1000; + else + dataTime = 500; + + stb0899_write_reg(state, STB0899_DSTATUS2, 0x00); /* force search loop */ + while (1) { + /* WARNING! VIT LOCKED has to be tested before VIT_END_LOOOP */ + reg = stb0899_read_reg(state, STB0899_VSTATUS); + lock = STB0899_GETFIELD(VSTATUS_LOCKEDVIT, reg); + loop = STB0899_GETFIELD(VSTATUS_END_LOOPVIT, reg); + + if (lock || loop || (index > dataTime)) + break; + index++; + } + + if (lock) { /* DATA LOCK indicator */ + internal->status = DATAOK; + dprintk(state->verbose, FE_DEBUG, 1, "-----------------> DATA OK !"); + } + + return internal->status; +} + +/* + * stb0899_search_data + * Search for a QPSK carrier with the derotator + */ +static enum stb0899_status stb0899_search_data(struct stb0899_state *state) +{ + short int derot_freq, derot_step, derot_limit, next_loop = 3; + u8 cfr[2]; + u8 reg; + int index = 1; + + struct stb0899_internal *internal = &state->internal; + struct stb0899_params *params = &state->params; + + derot_step = (params->srate / 4L) / internal->mclk; + derot_limit = (internal->sub_range / 2L) / internal->mclk; + derot_freq = internal->derot_freq; + + do { + if ((internal->status != CARRIEROK) || (stb0899_check_data(state) != DATAOK)) { + + derot_freq += index * internal->direction * derot_step; /* next zig zag derotator position */ + if (ABS(derot_freq) > derot_limit) + next_loop--; + + if (next_loop) { + dprintk(state->verbose, FE_DEBUG, 1, "Derot freq=%d, mclk=%d", derot_freq, internal->mclk); + reg = stb0899_read_reg(state, STB0899_CFD); + STB0899_SETFIELD_VAL(CFD_ON, reg, 1); + stb0899_write_reg(state, STB0899_CFD, reg); + + STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(state->config->inversion * derot_freq)); + STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(state->config->inversion * derot_freq)); + stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */ + + stb0899_check_carrier(state); + index++; + } + } + internal->direction = -internal->direction; /* change zig zag direction */ + } while ((internal->status != DATAOK) && next_loop); + + if (internal->status == DATAOK) { + stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */ + internal->derot_freq = state->config->inversion * MAKEWORD16(cfr[0], cfr[1]); + dprintk(state->verbose, FE_DEBUG, 1, "------> DATAOK ! Derot Freq=%d", internal->derot_freq); + } + + return internal->status; +} + +/* + * stb0899_check_range + * check if the found frequency is in the correct range + */ +static enum stb0899_status stb0899_check_range(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + struct stb0899_params *params = &state->params; + + int range_offst, tp_freq; + + range_offst = internal->srch_range / 2000; + tp_freq = internal->freq + (internal->derot_freq * internal->mclk) / 1000; + + if ((tp_freq >= params->freq - range_offst) && (tp_freq <= params->freq + range_offst)) { + internal->status = RANGEOK; + dprintk(state->verbose, FE_DEBUG, 1, "----> RANGEOK !"); + } else { + internal->status = OUTOFRANGE; + dprintk(state->verbose, FE_DEBUG, 1, "----> OUT OF RANGE !"); + } + + return internal->status; +} + +/* + * NextSubRange + * Compute the next subrange of the search + */ +static void next_sub_range(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + struct stb0899_params *params = &state->params; + + long old_sub_range; + + if (internal->sub_dir > 0) { + old_sub_range = internal->sub_range; + internal->sub_range = MIN((internal->srch_range / 2) - + (internal->tuner_offst + internal->sub_range / 2), + internal->sub_range); + + if (internal->sub_range < 0) + internal->sub_range = 0; + + internal->tuner_offst += (old_sub_range + internal->sub_range) / 2; + } + + internal->freq = params->freq + (internal->sub_dir * internal->tuner_offst) / 1000; + internal->sub_dir = -internal->sub_dir; +} + +/* + * stb0899_dvbs_algo + * Search for a signal, timing, carrier and data for a + * given frequency in a given range + */ +enum stb0899_status stb0899_dvbs_algo(struct stb0899_state *state) +{ + struct stb0899_params *params = &state->params; + struct stb0899_internal *internal = &state->internal; + struct stb0899_config *config = state->config; + + u8 bclc, reg; + u8 cfr[2]; + u8 eq_const[10]; + s32 clnI = 3; + u32 bandwidth = 0; + + /* BETA values rated @ 99MHz */ + s32 betaTab[5][4] = { + /* 5 10 20 30MBps */ + { 37, 34, 32, 31 }, /* QPSK 1/2 */ + { 37, 35, 33, 31 }, /* QPSK 2/3 */ + { 37, 35, 33, 31 }, /* QPSK 3/4 */ + { 37, 36, 33, 32 }, /* QPSK 5/6 */ + { 37, 36, 33, 32 } /* QPSK 7/8 */ + }; + + internal->direction = 1; + + stb0899_set_srate(state, internal->master_clk, params->srate); + /* Carrier loop optimization versus symbol rate for acquisition*/ + if (params->srate <= 5000000) { + stb0899_write_reg(state, STB0899_ACLC, 0x89); + bclc = stb0899_read_reg(state, STB0899_BCLC); + STB0899_SETFIELD_VAL(BETA, bclc, 0x1c); + stb0899_write_reg(state, STB0899_BCLC, bclc); + clnI = 0; + } else if (params->srate <= 15000000) { + stb0899_write_reg(state, STB0899_ACLC, 0xc9); + bclc = stb0899_read_reg(state, STB0899_BCLC); + STB0899_SETFIELD_VAL(BETA, bclc, 0x22); + stb0899_write_reg(state, STB0899_BCLC, bclc); + clnI = 1; + } else if(params->srate <= 25000000) { + stb0899_write_reg(state, STB0899_ACLC, 0x89); + bclc = stb0899_read_reg(state, STB0899_BCLC); + STB0899_SETFIELD_VAL(BETA, bclc, 0x27); + stb0899_write_reg(state, STB0899_BCLC, bclc); + clnI = 2; + } else { + stb0899_write_reg(state, STB0899_ACLC, 0xc8); + bclc = stb0899_read_reg(state, STB0899_BCLC); + STB0899_SETFIELD_VAL(BETA, bclc, 0x29); + stb0899_write_reg(state, STB0899_BCLC, bclc); + clnI = 3; + } + + dprintk(state->verbose, FE_DEBUG, 1, "Set the timing loop to acquisition"); + /* Set the timing loop to acquisition */ + stb0899_write_reg(state, STB0899_RTC, 0x46); + stb0899_write_reg(state, STB0899_CFD, 0xee); + + /* !! WARNING !! + * Do not read any status variables while acquisition, + * If any needed, read before the acquisition starts + * querying status while acquiring causes the + * acquisition to go bad and hence no locks. + */ + dprintk(state->verbose, FE_DEBUG, 1, "Derot Percent=%d Srate=%d mclk=%d", + internal->derot_percent, params->srate, internal->mclk); + + /* Initial calculations */ + internal->derot_step = internal->derot_percent * (params->srate / 1000L) / internal->mclk; /* DerotStep/1000 * Fsymbol */ + internal->t_derot = stb0899_calc_derot_time(params->srate); + internal->t_data = 500; + + dprintk(state->verbose, FE_DEBUG, 1, "RESET stream merger"); + /* RESET Stream merger */ + reg = stb0899_read_reg(state, STB0899_TSTRES); + STB0899_SETFIELD_VAL(FRESRS, reg, 1); + stb0899_write_reg(state, STB0899_TSTRES, reg); + + /* + * Set KDIVIDER to an intermediate value between + * 1/2 and 7/8 for acquisition + */ + reg = stb0899_read_reg(state, STB0899_DEMAPVIT); + STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 60); + stb0899_write_reg(state, STB0899_DEMAPVIT, reg); + + stb0899_write_reg(state, STB0899_EQON, 0x01); /* Equalizer OFF while acquiring */ + stb0899_write_reg(state, STB0899_VITSYNC, 0x19); + + stb0899_first_subrange(state); + do { + /* Initialisations */ + cfr[0] = cfr[1] = 0; + stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* RESET derotator frequency */ + + stb0899_write_reg(state, STB0899_RTF, 0); + reg = stb0899_read_reg(state, STB0899_CFD); + STB0899_SETFIELD_VAL(CFD_ON, reg, 1); + stb0899_write_reg(state, STB0899_CFD, reg); + + internal->derot_freq = 0; + internal->status = NOAGC1; + + /* enable tuner I/O */ + stb0899_i2c_gate_ctrl(&state->frontend, 1); + + /* Move tuner to frequency */ + dprintk(state->verbose, FE_DEBUG, 1, "Tuner set frequency"); + if (state->config->tuner_set_frequency) + state->config->tuner_set_frequency(&state->frontend, internal->freq); + + if (state->config->tuner_get_frequency) + state->config->tuner_get_frequency(&state->frontend, &internal->freq); + + msleep(internal->t_agc1 + internal->t_agc2 + internal->t_derot); /* AGC1, AGC2 and timing loop */ + dprintk(state->verbose, FE_DEBUG, 1, "current derot freq=%d", internal->derot_freq); + internal->status = AGC1OK; + + /* There is signal in the band */ + if (config->tuner_get_bandwidth) + config->tuner_get_bandwidth(&state->frontend, &bandwidth); + + /* disable tuner I/O */ + stb0899_i2c_gate_ctrl(&state->frontend, 0); + + if (params->srate <= bandwidth / 2) + stb0899_search_tmg(state); /* For low rates (SCPC) */ + else + stb0899_check_tmg(state); /* For high rates (MCPC) */ + + if (internal->status == TIMINGOK) { + dprintk(state->verbose, FE_DEBUG, 1, + "TIMING OK ! Derot freq=%d, mclk=%d", + internal->derot_freq, internal->mclk); + + if (stb0899_search_carrier(state) == CARRIEROK) { /* Search for carrier */ + dprintk(state->verbose, FE_DEBUG, 1, + "CARRIER OK ! Derot freq=%d, mclk=%d", + internal->derot_freq, internal->mclk); + + if (stb0899_search_data(state) == DATAOK) { /* Check for data */ + dprintk(state->verbose, FE_DEBUG, 1, + "DATA OK ! Derot freq=%d, mclk=%d", + internal->derot_freq, internal->mclk); + + if (stb0899_check_range(state) == RANGEOK) { + dprintk(state->verbose, FE_DEBUG, 1, + "RANGE OK ! derot freq=%d, mclk=%d", + internal->derot_freq, internal->mclk); + + internal->freq = params->freq + ((internal->derot_freq * internal->mclk) / 1000); + reg = stb0899_read_reg(state, STB0899_PLPARM); + internal->fecrate = STB0899_GETFIELD(VITCURPUN, reg); + dprintk(state->verbose, FE_DEBUG, 1, + "freq=%d, internal resultant freq=%d", + params->freq, internal->freq); + + dprintk(state->verbose, FE_DEBUG, 1, + "internal puncture rate=%d", + internal->fecrate); + } + } + } + } + if (internal->status != RANGEOK) + next_sub_range(state); + + } while (internal->sub_range && internal->status != RANGEOK); + + /* Set the timing loop to tracking */ + stb0899_write_reg(state, STB0899_RTC, 0x33); + stb0899_write_reg(state, STB0899_CFD, 0xf7); + /* if locked and range ok, set Kdiv */ + if (internal->status == RANGEOK) { + dprintk(state->verbose, FE_DEBUG, 1, "Locked & Range OK !"); + stb0899_write_reg(state, STB0899_EQON, 0x41); /* Equalizer OFF while acquiring */ + stb0899_write_reg(state, STB0899_VITSYNC, 0x39); /* SN to b'11 for acquisition */ + + /* + * Carrier loop optimization versus + * symbol Rate/Puncture Rate for Tracking + */ + reg = stb0899_read_reg(state, STB0899_BCLC); + switch (internal->fecrate) { + case STB0899_FEC_1_2: /* 13 */ + stb0899_write_reg(state, STB0899_DEMAPVIT, 0x1a); + STB0899_SETFIELD_VAL(BETA, reg, betaTab[0][clnI]); + stb0899_write_reg(state, STB0899_BCLC, reg); + break; + case STB0899_FEC_2_3: /* 18 */ + stb0899_write_reg(state, STB0899_DEMAPVIT, 44); + STB0899_SETFIELD_VAL(BETA, reg, betaTab[1][clnI]); + stb0899_write_reg(state, STB0899_BCLC, reg); + break; + case STB0899_FEC_3_4: /* 21 */ + stb0899_write_reg(state, STB0899_DEMAPVIT, 60); + STB0899_SETFIELD_VAL(BETA, reg, betaTab[2][clnI]); + stb0899_write_reg(state, STB0899_BCLC, reg); + break; + case STB0899_FEC_5_6: /* 24 */ + stb0899_write_reg(state, STB0899_DEMAPVIT, 75); + STB0899_SETFIELD_VAL(BETA, reg, betaTab[3][clnI]); + stb0899_write_reg(state, STB0899_BCLC, reg); + break; + case STB0899_FEC_6_7: /* 25 */ + stb0899_write_reg(state, STB0899_DEMAPVIT, 88); + stb0899_write_reg(state, STB0899_ACLC, 0x88); + stb0899_write_reg(state, STB0899_BCLC, 0x9a); + break; + case STB0899_FEC_7_8: /* 26 */ + stb0899_write_reg(state, STB0899_DEMAPVIT, 94); + STB0899_SETFIELD_VAL(BETA, reg, betaTab[4][clnI]); + stb0899_write_reg(state, STB0899_BCLC, reg); + break; + default: + dprintk(state->verbose, FE_DEBUG, 1, "Unsupported Puncture Rate"); + break; + } + /* release stream merger RESET */ + reg = stb0899_read_reg(state, STB0899_TSTRES); + STB0899_SETFIELD_VAL(FRESRS, reg, 0); + stb0899_write_reg(state, STB0899_TSTRES, reg); + + /* disable carrier detector */ + reg = stb0899_read_reg(state, STB0899_CFD); + STB0899_SETFIELD_VAL(CFD_ON, reg, 0); + stb0899_write_reg(state, STB0899_CFD, reg); + + stb0899_read_regs(state, STB0899_EQUAI1, eq_const, 10); + } + + return internal->status; +} + +/* + * stb0899_dvbs2_config_uwp + * Configure UWP state machine + */ +static void stb0899_dvbs2_config_uwp(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + struct stb0899_config *config = state->config; + u32 uwp1, uwp2, uwp3, reg; + + uwp1 = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_CNTRL1); + uwp2 = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_CNTRL2); + uwp3 = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_CNTRL3); + + STB0899_SETFIELD_VAL(UWP_ESN0_AVE, uwp1, config->esno_ave); + STB0899_SETFIELD_VAL(UWP_ESN0_QUANT, uwp1, config->esno_quant); + STB0899_SETFIELD_VAL(UWP_TH_SOF, uwp1, config->uwp_threshold_sof); + + STB0899_SETFIELD_VAL(FE_COARSE_TRK, uwp2, internal->av_frame_coarse); + STB0899_SETFIELD_VAL(FE_FINE_TRK, uwp2, internal->av_frame_fine); + STB0899_SETFIELD_VAL(UWP_MISS_TH, uwp2, config->miss_threshold); + + STB0899_SETFIELD_VAL(UWP_TH_ACQ, uwp3, config->uwp_threshold_acq); + STB0899_SETFIELD_VAL(UWP_TH_TRACK, uwp3, config->uwp_threshold_track); + + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_UWP_CNTRL1, STB0899_OFF0_UWP_CNTRL1, uwp1); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_UWP_CNTRL2, STB0899_OFF0_UWP_CNTRL2, uwp2); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_UWP_CNTRL3, STB0899_OFF0_UWP_CNTRL3, uwp3); + + reg = STB0899_READ_S2REG(STB0899_S2DEMOD, SOF_SRCH_TO); + STB0899_SETFIELD_VAL(SOF_SEARCH_TIMEOUT, reg, config->sof_search_timeout); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_SOF_SRCH_TO, STB0899_OFF0_SOF_SRCH_TO, reg); +} + +/* + * stb0899_dvbs2_config_csm_auto + * Set CSM to AUTO mode + */ +static void stb0899_dvbs2_config_csm_auto(struct stb0899_state *state) +{ + u32 reg; + + reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1); + STB0899_SETFIELD_VAL(CSM_AUTO_PARAM, reg, 1); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, reg); +} + +long Log2Int(int number) +{ + int i; + + i = 0; + while ((1 << i) <= ABS(number)) + i++; + + if (number == 0) + i = 1; + + return i - 1; +} + +/* + * stb0899_dvbs2_calc_srate + * compute BTR_NOM_FREQ for the symbol rate + */ +static u32 stb0899_dvbs2_calc_srate(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + struct stb0899_config *config = state->config; + + u32 dec_ratio, dec_rate, decim, remain, intval, btr_nom_freq; + u32 master_clk, srate; + + dec_ratio = (internal->master_clk * 2) / (5 * internal->srate); + dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio; + dec_rate = Log2Int(dec_ratio); + decim = 1 << dec_rate; + master_clk = internal->master_clk / 1000; + srate = internal->srate / 1000; + + if (decim <= 4) { + intval = (decim * (1 << (config->btr_nco_bits - 1))) / master_clk; + remain = (decim * (1 << (config->btr_nco_bits - 1))) % master_clk; + } else { + intval = (1 << (config->btr_nco_bits - 1)) / (master_clk / 100) * decim / 100; + remain = (decim * (1 << (config->btr_nco_bits - 1))) % master_clk; + } + btr_nom_freq = (intval * srate) + ((remain * srate) / master_clk); + + return btr_nom_freq; +} + +/* + * stb0899_dvbs2_calc_dev + * compute the correction to be applied to symbol rate + */ +static u32 stb0899_dvbs2_calc_dev(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + u32 dec_ratio, correction, master_clk, srate; + + dec_ratio = (internal->master_clk * 2) / (5 * internal->srate); + dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio; + + master_clk = internal->master_clk / 1000; /* for integer Caculation*/ + srate = internal->srate / 1000; /* for integer Caculation*/ + correction = (512 * master_clk) / (2 * dec_ratio * srate); + + return correction; +} + +/* + * stb0899_dvbs2_set_srate + * Set DVBS2 symbol rate + */ +static void stb0899_dvbs2_set_srate(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + + u32 dec_ratio, dec_rate, win_sel, decim, f_sym, btr_nom_freq; + u32 correction, freq_adj, band_lim, decim_cntrl, reg; + u8 anti_alias; + + /*set decimation to 1*/ + dec_ratio = (internal->master_clk * 2) / (5 * internal->srate); + dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio; + dec_rate = Log2Int(dec_ratio); + + win_sel = 0; + if (dec_rate >= 5) + win_sel = dec_rate - 4; + + decim = (1 << dec_rate); + /* (FSamp/Fsymbol *100) for integer Caculation */ + f_sym = internal->master_clk / ((decim * internal->srate) / 1000); + + if (f_sym <= 2250) /* don't band limit signal going into btr block*/ + band_lim = 1; + else + band_lim = 0; /* band limit signal going into btr block*/ + + decim_cntrl = ((win_sel << 3) & 0x18) + ((band_lim << 5) & 0x20) + (dec_rate & 0x7); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_DECIM_CNTRL, STB0899_OFF0_DECIM_CNTRL, decim_cntrl); + + if (f_sym <= 3450) + anti_alias = 0; + else if (f_sym <= 4250) + anti_alias = 1; + else + anti_alias = 2; + + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_ANTI_ALIAS_SEL, STB0899_OFF0_ANTI_ALIAS_SEL, anti_alias); + btr_nom_freq = stb0899_dvbs2_calc_srate(state); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_NOM_FREQ, STB0899_OFF0_BTR_NOM_FREQ, btr_nom_freq); + + correction = stb0899_dvbs2_calc_dev(state); + reg = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_CNTRL); + STB0899_SETFIELD_VAL(BTR_FREQ_CORR, reg, correction); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_CNTRL, STB0899_OFF0_BTR_CNTRL, reg); + + /* scale UWP+CSM frequency to sample rate*/ + freq_adj = internal->srate / (internal->master_clk / 4096); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_FREQ_ADJ_SCALE, STB0899_OFF0_FREQ_ADJ_SCALE, freq_adj); +} + +/* + * stb0899_dvbs2_set_btr_loopbw + * set bit timing loop bandwidth as a percentage of the symbol rate + */ +static void stb0899_dvbs2_set_btr_loopbw(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + struct stb0899_config *config = state->config; + + u32 sym_peak = 23, zeta = 707, loopbw_percent = 60; + s32 dec_ratio, dec_rate, k_btr1_rshft, k_btr1, k_btr0_rshft; + s32 k_btr0, k_btr2_rshft, k_direct_shift, k_indirect_shift; + u32 decim, K, wn, k_direct, k_indirect; + u32 reg; + + dec_ratio = (internal->master_clk * 2) / (5 * internal->srate); + dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio; + dec_rate = Log2Int(dec_ratio); + decim = (1 << dec_rate); + + sym_peak *= 576000; + K = (1 << config->btr_nco_bits) / (internal->master_clk / 1000); + K *= (internal->srate / 1000000) * decim; /*k=k 10^-8*/ + + if (K != 0) { + K = sym_peak / K; + wn = (4 * zeta * zeta) + 1000000; + wn = (2 * (loopbw_percent * 1000) * 40 * zeta) /wn; /*wn =wn 10^-8*/ + + k_indirect = (wn * wn) / K; + k_indirect = k_indirect; /*kindirect = kindirect 10^-6*/ + k_direct = (2 * wn * zeta) / K; /*kDirect = kDirect 10^-2*/ + k_direct *= 100; + + k_direct_shift = Log2Int(k_direct) - Log2Int(10000) - 2; + k_btr1_rshft = (-1 * k_direct_shift) + config->btr_gain_shift_offset; + k_btr1 = k_direct / (1 << k_direct_shift); + k_btr1 /= 10000; + + k_indirect_shift = Log2Int(k_indirect + 15) - 20 /*- 2*/; + k_btr0_rshft = (-1 * k_indirect_shift) + config->btr_gain_shift_offset; + k_btr0 = k_indirect * (1 << (-k_indirect_shift)); + k_btr0 /= 1000000; + + k_btr2_rshft = 0; + if (k_btr0_rshft > 15) { + k_btr2_rshft = k_btr0_rshft - 15; + k_btr0_rshft = 15; + } + reg = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_LOOP_GAIN); + STB0899_SETFIELD_VAL(KBTR0_RSHFT, reg, k_btr0_rshft); + STB0899_SETFIELD_VAL(KBTR0, reg, k_btr0); + STB0899_SETFIELD_VAL(KBTR1_RSHFT, reg, k_btr1_rshft); + STB0899_SETFIELD_VAL(KBTR1, reg, k_btr1); + STB0899_SETFIELD_VAL(KBTR2_RSHFT, reg, k_btr2_rshft); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_LOOP_GAIN, STB0899_OFF0_BTR_LOOP_GAIN, reg); + } else + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_LOOP_GAIN, STB0899_OFF0_BTR_LOOP_GAIN, 0xc4c4f); +} + +/* + * stb0899_dvbs2_set_carr_freq + * set nominal frequency for carrier search + */ +static void stb0899_dvbs2_set_carr_freq(struct stb0899_state *state, s32 carr_freq, u32 master_clk) +{ + struct stb0899_config *config = state->config; + s32 crl_nom_freq; + u32 reg; + + crl_nom_freq = (1 << config->crl_nco_bits) / master_clk; + crl_nom_freq *= carr_freq; + reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_NOM_FREQ); + STB0899_SETFIELD_VAL(CRL_NOM_FREQ, reg, crl_nom_freq); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_NOM_FREQ, STB0899_OFF0_CRL_NOM_FREQ, reg); +} + +/* + * stb0899_dvbs2_init_calc + * Initialize DVBS2 UWP, CSM, carrier and timing loops + */ +static void stb0899_dvbs2_init_calc(struct stb0899_state *state) +{ + struct stb0899_internal *internal = &state->internal; + s32 steps, step_size; + u32 range, reg; + + /* config uwp and csm */ + stb0899_dvbs2_config_uwp(state); + stb0899_dvbs2_config_csm_auto(state); + + /* initialize BTR */ + stb0899_dvbs2_set_srate(state); + stb0899_dvbs2_set_btr_loopbw(state); + + if (internal->srate / 1000000 >= 15) + step_size = (1 << 17) / 5; + else if (internal->srate / 1000000 >= 10) + step_size = (1 << 17) / 7; + else if (internal->srate / 1000000 >= 5) + step_size = (1 << 17) / 10; + else + step_size = (1 << 17) / 4; + + range = internal->srch_range / 1000000; + steps = (10 * range * (1 << 17)) / (step_size * (internal->srate / 1000000)); + steps = (steps + 6) / 10; + steps = (steps == 0) ? 1 : steps; + if (steps % 2 == 0) + stb0899_dvbs2_set_carr_freq(state, internal->center_freq - + (internal->step_size * (internal->srate / 20000000)), + (internal->master_clk) / 1000000); + else + stb0899_dvbs2_set_carr_freq(state, internal->center_freq, (internal->master_clk) / 1000000); + + /*Set Carrier Search params (zigzag, num steps and freq step size*/ + reg = STB0899_READ_S2REG(STB0899_S2DEMOD, ACQ_CNTRL2); + STB0899_SETFIELD_VAL(ZIGZAG, reg, 1); + STB0899_SETFIELD_VAL(NUM_STEPS, reg, steps); + STB0899_SETFIELD_VAL(FREQ_STEPSIZE, reg, step_size); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_ACQ_CNTRL2, STB0899_OFF0_ACQ_CNTRL2, reg); +} + +/* + * stb0899_dvbs2_btr_init + * initialize the timing loop + */ +static void stb0899_dvbs2_btr_init(struct stb0899_state *state) +{ + u32 reg; + + /* set enable BTR loopback */ + reg = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_CNTRL); + STB0899_SETFIELD_VAL(INTRP_PHS_SENSE, reg, 1); + STB0899_SETFIELD_VAL(BTR_ERR_ENA, reg, 1); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_CNTRL, STB0899_OFF0_BTR_CNTRL, reg); + + /* fix btr freq accum at 0 */ + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_FREQ_INIT, STB0899_OFF0_BTR_FREQ_INIT, 0x10000000); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_FREQ_INIT, STB0899_OFF0_BTR_FREQ_INIT, 0x00000000); + + /* fix btr freq accum at 0 */ + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_PHS_INIT, STB0899_OFF0_BTR_PHS_INIT, 0x10000000); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_PHS_INIT, STB0899_OFF0_BTR_PHS_INIT, 0x00000000); +} + +/* + * stb0899_dvbs2_reacquire + * trigger a DVB-S2 acquisition + */ +static void stb0899_dvbs2_reacquire(struct stb0899_state *state) +{ + u32 reg = 0; + + /* demod soft reset */ + STB0899_SETFIELD_VAL(DVBS2_RESET, reg, 1); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_RESET_CNTRL, STB0899_OFF0_RESET_CNTRL, reg); + + /*Reset Timing Loop */ + stb0899_dvbs2_btr_init(state); + + /* reset Carrier loop */ + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_FREQ_INIT, STB0899_OFF0_CRL_FREQ_INIT, (1 << 30)); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_FREQ_INIT, STB0899_OFF0_CRL_FREQ_INIT, 0); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_LOOP_GAIN, STB0899_OFF0_CRL_LOOP_GAIN, 0); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_PHS_INIT, STB0899_OFF0_CRL_PHS_INIT, (1 << 30)); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_PHS_INIT, STB0899_OFF0_CRL_PHS_INIT, 0); + + /*release demod soft reset */ + reg = 0; + STB0899_SETFIELD_VAL(DVBS2_RESET, reg, 0); + stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_RESET_CNTRL, STB0899_OFF0_RESET_CNTRL, reg); + |