diff options
| author | tvboxspy <tvboxspy@gmail.com> | 2011-07-11 01:37:13 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-09-21 21:43:49 +0400 |
| commit | 59152b1cf1182fd671dafa056cebeed95d0b1468 (patch) | |
| tree | 443063f5f261735024ef36feef3d24d1067a6879 /drivers | |
| parent | 6783fe5f16c2fa9b474f096f66b3c8101fc48714 (diff) | |
| download | linux-59152b1cf1182fd671dafa056cebeed95d0b1468.tar.xz | |
[media] STV0288 frontend provide wider carrier search and DVB-S2 drop out. resend
The following patch provides wider carrier search.
As with existing code search starts at MSB aligned. The boundary
is widened to start at -9. In order to save time, if no carrier is
detected at the start it advances to the next alignment until carrier
is found.
The stv0288 will detect a DVB-S2 carrier on all steps , a
time out of 11 steps is introduced to drop out of the loop.
In stv0288_set_symbol carrier and timing loops are restored to
default values (inittab) before setting the symbol rate on each tune. A
slight drift was noticed with full scan in the higher IF frequencies of
each band.
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/dvb/frontends/stv0288.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/drivers/media/dvb/frontends/stv0288.c b/drivers/media/dvb/frontends/stv0288.c index 8e0cfadba688..0aa3962ff18b 100644 --- a/drivers/media/dvb/frontends/stv0288.c +++ b/drivers/media/dvb/frontends/stv0288.c @@ -127,6 +127,11 @@ static int stv0288_set_symbolrate(struct dvb_frontend *fe, u32 srate) if ((srate < 1000000) || (srate > 45000000)) return -EINVAL; + stv0288_writeregI(state, 0x22, 0); + stv0288_writeregI(state, 0x23, 0); + stv0288_writeregI(state, 0x2b, 0xff); + stv0288_writeregI(state, 0x2c, 0xf7); + temp = (unsigned int)srate / 1000; temp = temp * 32768; @@ -461,6 +466,7 @@ static int stv0288_set_frontend(struct dvb_frontend *fe, char tm; unsigned char tda[3]; + u8 reg, time_out = 0; dprintk("%s : FE_SET_FRONTEND\n", __func__); @@ -488,22 +494,29 @@ static int stv0288_set_frontend(struct dvb_frontend *fe, /* Carrier lock control register */ stv0288_writeregI(state, 0x15, 0xc5); - tda[0] = 0x2b; /* CFRM */ tda[2] = 0x0; /* CFRL */ - for (tm = -6; tm < 7;) { + for (tm = -9; tm < 7;) { /* Viterbi status */ - if (stv0288_readreg(state, 0x24) & 0x8) - break; - - tda[2] += 40; - if (tda[2] < 40) + reg = stv0288_readreg(state, 0x24); + if (reg & 0x8) + break; + if (reg & 0x80) { + time_out++; + if (time_out > 10) + break; + tda[2] += 40; + if (tda[2] < 40) + tm++; + } else { tm++; + tda[2] = 0; + time_out = 0; + } tda[1] = (unsigned char)tm; stv0288_writeregI(state, 0x2b, tda[1]); stv0288_writeregI(state, 0x2c, tda[2]); udelay(30); } - state->tuner_frequency = c->frequency; state->fec_inner = FEC_AUTO; state->symbol_rate = c->symbol_rate; |