// SPDX-License-Identifier: GPL-2.0-or-later
/*
STB0899 Multistandard Frontend driver
Copyright (C) Manu Abraham (abraham.manu@gmail.com)
Copyright (C) ST Microelectronics
*/
#include <linux/bitops.h>
#include "stb0899_drv.h"
#include "stb0899_priv.h"
#include "stb0899_reg.h"
static inline u32 stb0899_do_div(u64 n, u32 d)
{
/* wrap do_div() for ease of use */
do_div(n, d);
return n;
}
#if 0
/* These functions are currently unused */
/*
* 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 &= ~0 xf;
tmp *= master_clk;
tmp >>= 24 ;
return tmp;
}
/*
* stb0899_get_srate
* Get the current symbol rate
*/
static 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);
}
#endif
/*
* 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 = 0 L;
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, 0 xf2);
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 / 2 L) / internal->mclk;
derot_step = (params->srate / 2 L) / 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(internal->inversion * derot_freq));
STB0899_SETFIELD_VAL(CFRL, cfr[1 ], LSB(internal->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 = internal->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 ] = {0 };
u8 reg;
internal->status = NOCARRIER;
derot_limit = (internal->sub_range / 2 L) / 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(internal->inversion * derot_freq));
STB0899_SETFIELD_VAL(CFRL, cfr[1 ], LSB(internal->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 = internal->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 ;
/* clear previous failed END_LOOPVIT */
stb0899_read_reg(state, STB0899_VSTATUS);
stb0899_write_reg(state, STB0899_DSTATUS2, 0 x00); /* 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 / 4 L) / internal->mclk;
derot_limit = (internal->sub_range / 2 L) / 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(internal->inversion * derot_freq));
STB0899_SETFIELD_VAL(CFRL, cfr[1 ], LSB(internal->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 */
/* store autodetected IQ swapping as default for DVB-S2 tuning */
reg = stb0899_read_reg(state, STB0899_IQSWAP);
if (STB0899_GETFIELD(SYM, reg))
internal->inversion = IQ_SWAP_ON;
else
internal->inversion = IQ_SWAP_OFF;
internal->derot_freq = internal->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, 0 x89);
bclc = stb0899_read_reg(state, STB0899_BCLC);
STB0899_SETFIELD_VAL(BETA, bclc, 0 x1c);
stb0899_write_reg(state, STB0899_BCLC, bclc);
clnI = 0 ;
} else if (params->srate <= 15000000 ) {
stb0899_write_reg(state, STB0899_ACLC, 0 xc9);
bclc = stb0899_read_reg(state, STB0899_BCLC);
STB0899_SETFIELD_VAL(BETA, bclc, 0 x22);
stb0899_write_reg(state, STB0899_BCLC, bclc);
clnI = 1 ;
} else if (params->srate <= 25000000 ) {
stb0899_write_reg(state, STB0899_ACLC, 0 x89);
bclc = stb0899_read_reg(state, STB0899_BCLC);
STB0899_SETFIELD_VAL(BETA, bclc, 0 x27);
stb0899_write_reg(state, STB0899_BCLC, bclc);
clnI = 2 ;
} else {
stb0899_write_reg(state, STB0899_ACLC, 0 xc8);
bclc = stb0899_read_reg(state, STB0899_BCLC);
STB0899_SETFIELD_VAL(BETA, bclc, 0 x29);
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, 0 x46);
stb0899_write_reg(state, STB0899_CFD, 0 xee);
/* !! 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 / 1000 L) / 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, 0 x01); /* Equalizer OFF while acquiring */
stb0899_write_reg(state, STB0899_VITSYNC, 0 x19);
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, 0 x33);
stb0899_write_reg(state, STB0899_CFD, 0 xf7);
/* 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, 0 x41); /* Equalizer OFF while acquiring */
stb0899_write_reg(state, STB0899_VITSYNC, 0 x39); /* 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, 0 x1a);
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, 0 x88);
stb0899_write_reg(state, STB0899_BCLC, 0 x9a);
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);
}
static 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 Calculation*/
srate = internal->srate / 1000 ; /* for integer Calculation*/
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 Calculation */
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 ) & 0 x18) + ((band_lim << 5 ) & 0 x20) + (dec_rate & 0 x7);
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; /*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, 0 xc4c4f);
}
/*
* 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, 0 x10000000);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_FREQ_INIT, STB0899_OFF0_BTR_FREQ_INIT, 0 x00000000);
/* fix btr freq accum at 0 */
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_PHS_INIT, STB0899_OFF0_BTR_PHS_INIT, 0 x10000000);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_PHS_INIT, STB0899_OFF0_BTR_PHS_INIT, 0 x00000000);
}
/*
* 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);
/* start acquisition process */
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_ACQUIRE_TRIG, STB0899_OFF0_ACQUIRE_TRIG, 1 );
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_LOCK_LOST, STB0899_OFF0_LOCK_LOST, 0 );
/* equalizer Init */
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQUALIZER_INIT, STB0899_OFF0_EQUALIZER_INIT, 1 );
/*Start equilizer */
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQUALIZER_INIT, STB0899_OFF0_EQUALIZER_INIT, 0 );
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, EQ_CNTRL);
STB0899_SETFIELD_VAL(EQ_SHIFT, reg, 0 );
STB0899_SETFIELD_VAL(EQ_DISABLE_UPDATE, reg, 0 );
STB0899_SETFIELD_VAL(EQ_DELAY, reg, 0 x05);
STB0899_SETFIELD_VAL(EQ_ADAPT_MODE, reg, 0 x01);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQ_CNTRL, STB0899_OFF0_EQ_CNTRL, reg);
/* RESET Packet delineator */
stb0899_write_reg(state, STB0899_PDELCTRL, 0 x4a);
}
/*
* stb0899_dvbs2_get_dmd_status
* get DVB-S2 Demod LOCK status
*/
static enum stb0899_status stb0899_dvbs2_get_dmd_status(struct stb0899_state *state, int timeout)
{
int time = -10 , lock = 0 , uwp, csm;
u32 reg;
do {
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_STATUS);
dprintk(state->verbose, FE_DEBUG, 1 , "DMD_STATUS=[0x%02x]" , reg);
if (STB0899_GETFIELD(IF_AGC_LOCK, reg))
dprintk(state->verbose, FE_DEBUG, 1 , "------------->IF AGC LOCKED !" );
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_STAT2);
dprintk(state->verbose, FE_DEBUG, 1 , "----------->DMD STAT2=[0x%02x]" , reg);
uwp = STB0899_GETFIELD(UWP_LOCK, reg);
csm = STB0899_GETFIELD(CSM_LOCK, reg);
if (uwp && csm)
lock = 1 ;
time += 10 ;
msleep(10 );
} while ((!lock) && (time <= timeout));
if (lock) {
dprintk(state->verbose, FE_DEBUG, 1 , "----------------> DVB-S2 LOCK !" );
return DVBS2_DEMOD_LOCK;
} else {
return DVBS2_DEMOD_NOLOCK;
}
}
/*
* stb0899_dvbs2_get_data_lock
* get FEC status
*/
static int stb0899_dvbs2_get_data_lock(struct stb0899_state *state, int timeout)
{
int time = 0 , lock = 0 ;
u8 reg;
while ((!lock) && (time < timeout)) {
reg = stb0899_read_reg(state, STB0899_CFGPDELSTATUS1);
dprintk(state->verbose, FE_DEBUG, 1 , "---------> CFGPDELSTATUS=[0x%02x]" , reg);
lock = STB0899_GETFIELD(CFGPDELSTATUS_LOCK, reg);
time++;
}
return lock;
}
/*
* stb0899_dvbs2_get_fec_status
* get DVB-S2 FEC LOCK status
*/
static enum stb0899_status stb0899_dvbs2_get_fec_status(struct stb0899_state *state, int timeout)
{
int time = 0 , Locked;
do {
Locked = stb0899_dvbs2_get_data_lock(state, 1 );
time++;
msleep(1 );
} while ((!Locked) && (time < timeout));
if (Locked) {
dprintk(state->verbose, FE_DEBUG, 1 , "---------->DVB-S2 FEC LOCK !" );
return DVBS2_FEC_LOCK;
} else {
return DVBS2_FEC_NOLOCK;
}
}
/*
* stb0899_dvbs2_init_csm
* set parameters for manual mode
*/
static void stb0899_dvbs2_init_csm(struct stb0899_state *state, int pilots, enum stb0899_modcod modcod)
{
struct stb0899_internal *internal = &state->internal;
s32 dvt_tbl = 1 , two_pass = 0 , agc_gain = 6 , agc_shift = 0 , loop_shift = 0 , phs_diff_thr = 0 x80;
s32 gamma_acq, gamma_rho_acq, gamma_trk, gamma_rho_trk, lock_count_thr;
u32 csm1, csm2, csm3, csm4;
if (((internal->master_clk / internal->srate) <= 4 ) && (modcod <= 11 ) && (pilots == 1 )) {
switch (modcod) {
case STB0899_QPSK_12:
gamma_acq = 25 ;
gamma_rho_acq = 2700 ;
gamma_trk = 12 ;
gamma_rho_trk = 180 ;
lock_count_thr = 8 ;
break ;
case STB0899_QPSK_35:
gamma_acq = 38 ;
gamma_rho_acq = 7182 ;
gamma_trk = 14 ;
gamma_rho_trk = 308 ;
lock_count_thr = 8 ;
break ;
case STB0899_QPSK_23:
gamma_acq = 42 ;
gamma_rho_acq = 9408 ;
gamma_trk = 17 ;
gamma_rho_trk = 476 ;
lock_count_thr = 8 ;
break ;
case STB0899_QPSK_34:
gamma_acq = 53 ;
gamma_rho_acq = 16642 ;
gamma_trk = 19 ;
gamma_rho_trk = 646 ;
lock_count_thr = 8 ;
break ;
case STB0899_QPSK_45:
gamma_acq = 53 ;
gamma_rho_acq = 17119 ;
gamma_trk = 22 ;
gamma_rho_trk = 880 ;
lock_count_thr = 8 ;
break ;
case STB0899_QPSK_56:
gamma_acq = 55 ;
gamma_rho_acq = 19250 ;
gamma_trk = 23 ;
gamma_rho_trk = 989 ;
lock_count_thr = 8 ;
break ;
case STB0899_QPSK_89:
gamma_acq = 60 ;
gamma_rho_acq = 24240 ;
gamma_trk = 24 ;
gamma_rho_trk = 1176 ;
lock_count_thr = 8 ;
break ;
case STB0899_QPSK_910:
gamma_acq = 66 ;
gamma_rho_acq = 29634 ;
gamma_trk = 24 ;
gamma_rho_trk = 1176 ;
lock_count_thr = 8 ;
break ;
default :
gamma_acq = 66 ;
gamma_rho_acq = 29634 ;
gamma_trk = 24 ;
gamma_rho_trk = 1176 ;
lock_count_thr = 8 ;
break ;
}
csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
STB0899_SETFIELD_VAL(CSM_AUTO_PARAM, csm1, 0 );
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
csm2 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL2);
csm3 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL3);
csm4 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL4);
STB0899_SETFIELD_VAL(CSM_DVT_TABLE, csm1, dvt_tbl);
STB0899_SETFIELD_VAL(CSM_TWO_PASS, csm1, two_pass);
STB0899_SETFIELD_VAL(CSM_AGC_GAIN, csm1, agc_gain);
STB0899_SETFIELD_VAL(CSM_AGC_SHIFT, csm1, agc_shift);
STB0899_SETFIELD_VAL(FE_LOOP_SHIFT, csm1, loop_shift);
STB0899_SETFIELD_VAL(CSM_GAMMA_ACQ, csm2, gamma_acq);
STB0899_SETFIELD_VAL(CSM_GAMMA_RHOACQ, csm2, gamma_rho_acq);
STB0899_SETFIELD_VAL(CSM_GAMMA_TRACK, csm3, gamma_trk);
STB0899_SETFIELD_VAL(CSM_GAMMA_RHOTRACK, csm3, gamma_rho_trk);
STB0899_SETFIELD_VAL(CSM_LOCKCOUNT_THRESH, csm4, lock_count_thr);
STB0899_SETFIELD_VAL(CSM_PHASEDIFF_THRESH, csm4, phs_diff_thr);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL2, STB0899_OFF0_CSM_CNTRL2, csm2);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL3, STB0899_OFF0_CSM_CNTRL3, csm3);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL4, STB0899_OFF0_CSM_CNTRL4, csm4);
}
}
/*
* stb0899_dvbs2_get_srate
* get DVB-S2 Symbol Rate
*/
static u32 stb0899_dvbs2_get_srate(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
struct stb0899_config *config = state->config;
u32 bTrNomFreq, srate, decimRate, intval1, intval2, reg;
int div1, div2, rem1, rem2;
div1 = config->btr_nco_bits / 2 ;
div2 = config->btr_nco_bits - div1 - 1 ;
bTrNomFreq = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_NOM_FREQ);
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DECIM_CNTRL);
decimRate = STB0899_GETFIELD(DECIM_RATE, reg);
decimRate = (1 << decimRate);
intval1 = internal->master_clk / (1 << div1);
intval2 = bTrNomFreq / (1 << div2);
rem1 = internal->master_clk % (1 << div1);
rem2 = bTrNomFreq % (1 << div2);
/* only for integer calculation */
srate = (intval1 * intval2) + ((intval1 * rem2) / (1 << div2)) + ((intval2 * rem1) / (1 << div1));
srate /= decimRate; /*symbrate = (btrnomfreq_register_val*MasterClock)/2^(27+decim_rate_field) */
return srate;
}
/*
* stb0899_dvbs2_algo
* Search for signal, timing, carrier and data for a given
* frequency in a given range
*/
enum stb0899_status stb0899_dvbs2_algo(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
enum stb0899_modcod modcod;
s32 offsetfreq, searchTime, FecLockTime, pilots, iqSpectrum;
int i = 0 ;
u32 reg, csm1;
if (internal->srate <= 2000000 ) {
searchTime = 5000 ; /* 5000 ms max time to lock UWP and CSM, SYMB <= 2Mbs */
FecLockTime = 350 ; /* 350 ms max time to lock FEC, SYMB <= 2Mbs */
} else if (internal->srate <= 5000000 ) {
searchTime = 2500 ; /* 2500 ms max time to lock UWP and CSM, 2Mbs < SYMB <= 5Mbs */
FecLockTime = 170 ; /* 170 ms max time to lock FEC, 2Mbs< SYMB <= 5Mbs */
} else if (internal->srate <= 10000000 ) {
searchTime = 1500 ; /* 1500 ms max time to lock UWP and CSM, 5Mbs <SYMB <= 10Mbs */
FecLockTime = 80 ; /* 80 ms max time to lock FEC, 5Mbs< SYMB <= 10Mbs */
} else if (internal->srate <= 15000000 ) {
searchTime = 500 ; /* 500 ms max time to lock UWP and CSM, 10Mbs <SYMB <= 15Mbs */
FecLockTime = 50 ; /* 50 ms max time to lock FEC, 10Mbs< SYMB <= 15Mbs */
} else if (internal->srate <= 20000000 ) {
searchTime = 300 ; /* 300 ms max time to lock UWP and CSM, 15Mbs < SYMB <= 20Mbs */
FecLockTime = 30 ; /* 50 ms max time to lock FEC, 15Mbs< SYMB <= 20Mbs */
} else if (internal->srate <= 25000000 ) {
searchTime = 250 ; /* 250 ms max time to lock UWP and CSM, 20 Mbs < SYMB <= 25Mbs */
FecLockTime = 25 ; /* 25 ms max time to lock FEC, 20Mbs< SYMB <= 25Mbs */
} else {
searchTime = 150 ; /* 150 ms max time to lock UWP and CSM, SYMB > 25Mbs */
FecLockTime = 20 ; /* 20 ms max time to lock FEC, 20Mbs< SYMB <= 25Mbs */
}
/* Maintain Stream Merger in reset during acquisition */
reg = stb0899_read_reg(state, STB0899_TSTRES);
STB0899_SETFIELD_VAL(FRESRS, reg, 1 );
stb0899_write_reg(state, STB0899_TSTRES, reg);
/* enable tuner I/O */
stb0899_i2c_gate_ctrl(&state->frontend, 1 );
/* Move tuner to 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);
/* disable tuner I/O */
stb0899_i2c_gate_ctrl(&state->frontend, 0 );
/* Set IF AGC to acquisition */
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL);
STB0899_SETFIELD_VAL(IF_LOOP_GAIN, reg, 4 );
STB0899_SETFIELD_VAL(IF_AGC_REF, reg, 32 );
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL, STB0899_OFF0_IF_AGC_CNTRL, reg);
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL2);
STB0899_SETFIELD_VAL(IF_AGC_DUMP_PER, reg, 0 );
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL2, STB0899_OFF0_IF_AGC_CNTRL2, reg);
/* Initialisation */
stb0899_dvbs2_init_calc(state);
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_CNTRL2);
switch (internal->inversion) {
case IQ_SWAP_OFF:
STB0899_SETFIELD_VAL(SPECTRUM_INVERT, reg, 0 );
break ;
case IQ_SWAP_ON:
STB0899_SETFIELD_VAL(SPECTRUM_INVERT, reg, 1 );
break ;
}
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_DMD_CNTRL2, STB0899_OFF0_DMD_CNTRL2, reg);
stb0899_dvbs2_reacquire(state);
/* Wait for demod lock (UWP and CSM) */
internal->status = stb0899_dvbs2_get_dmd_status(state, searchTime);
if (internal->status == DVBS2_DEMOD_LOCK) {
dprintk(state->verbose, FE_DEBUG, 1 , "------------> DVB-S2 DEMOD LOCK !" );
i = 0 ;
/* Demod Locked, check FEC status */
internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
/*If false lock (UWP and CSM Locked but no FEC) try 3 time max*/
while ((internal->status != DVBS2_FEC_LOCK) && (i < 3 )) {
/* Read the frequency offset*/
offsetfreq = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_FREQ);
/* Set the Nominal frequency to the found frequency offset for the next reacquire*/
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_NOM_FREQ);
STB0899_SETFIELD_VAL(CRL_NOM_FREQ, reg, offsetfreq);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_NOM_FREQ, STB0899_OFF0_CRL_NOM_FREQ, reg);
stb0899_dvbs2_reacquire(state);
internal->status = stb0899_dvbs2_get_fec_status(state, searchTime);
i++;
}
}
if (internal->status != DVBS2_FEC_LOCK) {
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_CNTRL2);
iqSpectrum = STB0899_GETFIELD(SPECTRUM_INVERT, reg);
/* IQ Spectrum Inversion */
STB0899_SETFIELD_VAL(SPECTRUM_INVERT, reg, !iqSpectrum);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_DMD_CNTRL2, STB0899_OFF0_DMD_CNTRL2, reg);
/* start acquistion process */
stb0899_dvbs2_reacquire(state);
/* Wait for demod lock (UWP and CSM) */
internal->status = stb0899_dvbs2_get_dmd_status(state, searchTime);
if (internal->status == DVBS2_DEMOD_LOCK) {
i = 0 ;
/* Demod Locked, check FEC */
internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
/*try thrice for false locks, (UWP and CSM Locked but no FEC) */
while ((internal->status != DVBS2_FEC_LOCK) && (i < 3 )) {
/* Read the frequency offset*/
offsetfreq = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_FREQ);
/* Set the Nominal frequency to the found frequency offset for the next reacquire*/
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_NOM_FREQ);
STB0899_SETFIELD_VAL(CRL_NOM_FREQ, reg, offsetfreq);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_NOM_FREQ, STB0899_OFF0_CRL_NOM_FREQ, reg);
stb0899_dvbs2_reacquire(state);
internal->status = stb0899_dvbs2_get_fec_status(state, searchTime);
i++;
}
}
/*
if (pParams->DVBS2State == FE_DVBS2_FEC_LOCKED)
pParams->IQLocked = !iqSpectrum;
*/
}
if (internal->status == DVBS2_FEC_LOCK) {
dprintk(state->verbose, FE_DEBUG, 1 , "----------------> DVB-S2 FEC Lock !" );
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_STAT2);
modcod = STB0899_GETFIELD(UWP_DECODE_MOD, reg) >> 2 ;
pilots = STB0899_GETFIELD(UWP_DECODE_MOD, reg) & 0 x01;
if ((((10 * internal->master_clk) / (internal->srate / 10 )) <= 410 ) &&
(INRANGE(STB0899_QPSK_23, modcod, STB0899_QPSK_910)) &&
(pilots == 1 )) {
stb0899_dvbs2_init_csm(state, pilots, modcod);
/* Wait for UWP,CSM and data LOCK 20ms max */
internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
i = 0 ;
while ((internal->status != DVBS2_FEC_LOCK) && (i < 3 )) {
csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
STB0899_SETFIELD_VAL(CSM_TWO_PASS, csm1, 1 );
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
STB0899_SETFIELD_VAL(CSM_TWO_PASS, csm1, 0 );
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
i++;
}
}
if ((((10 * internal->master_clk) / (internal->srate / 10 )) <= 410 ) &&
(INRANGE(STB0899_QPSK_12, modcod, STB0899_QPSK_35)) &&
(pilots == 1 )) {
/* Equalizer Disable update */
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, EQ_CNTRL);
STB0899_SETFIELD_VAL(EQ_DISABLE_UPDATE, reg, 1 );
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQ_CNTRL, STB0899_OFF0_EQ_CNTRL, reg);
}
/* slow down the Equalizer once locked */
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, EQ_CNTRL);
STB0899_SETFIELD_VAL(EQ_SHIFT, reg, 0 x02);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQ_CNTRL, STB0899_OFF0_EQ_CNTRL, reg);
/* Store signal parameters */
offsetfreq = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_FREQ);
offsetfreq = sign_extend32(offsetfreq, 29 );
offsetfreq = offsetfreq / ((1 << 30 ) / 1000 );
offsetfreq *= (internal->master_clk / 1000000 );
/* store current inversion for next run */
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_CNTRL2);
if (STB0899_GETFIELD(SPECTRUM_INVERT, reg))
internal->inversion = IQ_SWAP_ON;
else
internal->inversion = IQ_SWAP_OFF;
internal->freq = internal->freq + offsetfreq;
internal->srate = stb0899_dvbs2_get_srate(state);
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_STAT2);
internal->modcod = STB0899_GETFIELD(UWP_DECODE_MOD, reg) >> 2 ;
internal->pilots = STB0899_GETFIELD(UWP_DECODE_MOD, reg) & 0 x01;
internal->frame_length = (STB0899_GETFIELD(UWP_DECODE_MOD, reg) >> 1 ) & 0 x01;
/* Set IF AGC to tracking */
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL);
STB0899_SETFIELD_VAL(IF_LOOP_GAIN, reg, 3 );
/* if QPSK 1/2,QPSK 3/5 or QPSK 2/3 set IF AGC reference to 16 otherwise 32*/
if (INRANGE(STB0899_QPSK_12, internal->modcod, STB0899_QPSK_23))
STB0899_SETFIELD_VAL(IF_AGC_REF, reg, 16 );
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL, STB0899_OFF0_IF_AGC_CNTRL, reg);
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL2);
STB0899_SETFIELD_VAL(IF_AGC_DUMP_PER, reg, 7 );
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL2, STB0899_OFF0_IF_AGC_CNTRL2, reg);
}
/* Release Stream Merger Reset */
reg = stb0899_read_reg(state, STB0899_TSTRES);
STB0899_SETFIELD_VAL(FRESRS, reg, 0 );
stb0899_write_reg(state, STB0899_TSTRES, reg);
return internal->status;
}
Messung V0.5 in Prozent C=95 H=93 G=93
¤ Dauer der Verarbeitung: 0.35 Sekunden
(vorverarbeitet am 2026-06-05)
¤
*© Formatika GbR, Deutschland