Hi,
This is a patch which improve locking on dvb-s2 channels for card
using stb0899 (KNC1 DVB-S2 Plus, Satelco DVB-S2, TT S2 3200, Technisat
DVB-S2)
Regards,
JLac
--- linux/drivers/media/dvb/frontends/stb0899_algo.c.org 2007-10-08 21:25:09.000000000 +0200
+++ linux/drivers/media/dvb/frontends/stb0899_algo.c 2007-10-08 21:25:06.000000000 +0200
@@ -1351,7 +1351,17 @@
s32 offsetfreq, searchTime, FecLockTime, pilots, iqSpectrum;
int i = 0;
+ int cpt = 0;
u32 reg, csm1;
+ s32 retry = 0;
+
+
+ reg = STB0899_READ_S2REG( STB0899_S2DEMOD, DMD_CNTRL2 );
+ STB0899_SETFIELD_VAL( SPECTRUM_INVERT, reg, 1 );
+ stb0899_write_s2reg( state, STB0899_S2DEMOD, STB0899_BASE_DMD_CNTRL2, STB0899_OFF0_DMD_CNTRL2, reg );
+
+ do
+ {
if (internal->srate <= 2000000) {
searchTime = 5000; /* 5000 ms max time to lock UWP and CSM, SYMB <= 2Mbs */
@@ -1381,9 +1391,16 @@
STB0899_SETFIELD_VAL(FRESRS, reg, 1);
stb0899_write_reg(state, STB0899_TSTRES, reg);
+ reg = STB0899_READ_S2REG( STB0899_S2DEMOD, CRL_NOM_FREQ );
+ STB0899_SETFIELD_VAL( CRL_NOM_FREQ, reg, 0xd0 );
+ stb0899_write_s2reg( state, STB0899_S2DEMOD, STB0899_BASE_CRL_NOM_FREQ, STB0899_OFF0_CRL_NOM_FREQ, 0xd0 );
+
/* Move tuner to frequency */
if (state->config->tuner_set_frequency)
state->config->tuner_set_frequency(&state->frontend, internal->freq);
+
+ msleep( 100 );
+
if (state->config->tuner_get_frequency)
state->config->tuner_get_frequency(&state->frontend, &internal->freq);
@@ -1400,23 +1417,13 @@
/* 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;
- case IQ_SWAP_AUTO: /* use last successful search first */
- STB0899_SETFIELD_VAL(SPECTRUM_INVERT, reg, 1);
- break;
- }
- stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_DMD_CNTRL2, STB0899_OFF0_DMD_CNTRL2, reg);
+ stb0899_write_s2reg( state, STB0899_S2DEMOD, STB0899_BASE_DMD_CNTRL2, STB0899_OFF0_DMD_CNTRL, 0x0005 );
+
stb0899_dvbs2_reacquire(state);
/* Wait for demod lock (UWP and CSM) */
internal->status = stb0899_dvbs2_get_dmd_status(state, searchTime);
+ cpt++;
if (internal->status == DVBS2_DEMOD_LOCK) {
dprintk(state->verbose, FE_DEBUG, 1, "------------> DVB-S2 DEMOD LOCK !");
@@ -1432,51 +1439,28 @@
/* 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_write_s2reg( state, STB0899_S2DEMOD, STB0899_BASE_CRL_NOM_FREQ,
+ STB0899_OFF0_CRL_NOM_FREQ, offsetfreq );
stb0899_dvbs2_reacquire(state);
internal->status = stb0899_dvbs2_get_fec_status(state, searchTime);
i++;
}
}
- if (internal->status != DVBS2_FEC_LOCK) {
- if (internal->inversion == IQ_SWAP_AUTO) {
+ if( internal->status != DVBS2_FEC_LOCK )
+ {
+ /* IQ Inversion */
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);
+ }
+ else
+ {
- /* 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;
@@ -1550,6 +1534,8 @@
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);
}
+ }
+ while( ( ++retry < 5 ) && ( internal->status != DVBS2_FEC_LOCK ) );
/* Release Stream Merger Reset */
reg = stb0899_read_reg(state, STB0899_TSTRES);
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