diff options
Diffstat (limited to 'drivers/media/dvb/frontends/cx24123.c')
| -rw-r--r-- | drivers/media/dvb/frontends/cx24123.c | 50 |
1 files changed, 11 insertions, 39 deletions
diff --git a/drivers/media/dvb/frontends/cx24123.c b/drivers/media/dvb/frontends/cx24123.c index 3acd0d7f0b2c..815f0aaf1d4f 100644 --- a/drivers/media/dvb/frontends/cx24123.c +++ b/drivers/media/dvb/frontends/cx24123.c @@ -45,9 +45,6 @@ struct cx24123_state struct dvb_frontend frontend; - u32 lastber; - u16 snr; - /* Some PLL specifics for tuning */ u32 VCAarg; u32 VGAarg; @@ -223,7 +220,7 @@ static struct { {0x44, 0x00}, /* Constellation (default) */ {0x45, 0x00}, /* Symbol count (default) */ {0x46, 0x0d}, /* Symbol rate estimator on (default) */ - {0x56, 0x41}, /* Various (default) */ + {0x56, 0xc1}, /* Error Counter = Viterbi BER */ {0x57, 0xff}, /* Error Counter Window (default) */ {0x67, 0x83}, /* Non-DCII symbol clock */ }; @@ -801,29 +798,13 @@ static int cx24123_read_ber(struct dvb_frontend* fe, u32* ber) { struct cx24123_state *state = fe->demodulator_priv; - state->lastber = - ((cx24123_readreg(state, 0x1c) & 0x3f) << 16) | + /* The true bit error rate is this value divided by + the window size (set as 256 * 255) */ + *ber = ((cx24123_readreg(state, 0x1c) & 0x3f) << 16) | (cx24123_readreg(state, 0x1d) << 8 | - cx24123_readreg(state, 0x1e)); - - /* Do the signal quality processing here, it's derived from the BER. */ - /* Scale the BER from a 24bit to a SNR 16 bit where higher = better */ - if (state->lastber < 5000) - state->snr = 655*100; - else if ( (state->lastber >= 5000) && (state->lastber < 55000) ) - state->snr = 655*90; - else if ( (state->lastber >= 55000) && (state->lastber < 150000) ) - state->snr = 655*80; - else if ( (state->lastber >= 150000) && (state->lastber < 250000) ) - state->snr = 655*70; - else if ( (state->lastber >= 250000) && (state->lastber < 450000) ) - state->snr = 655*65; - else - state->snr = 0; - - dprintk("%s: BER = %d, S/N index = %d\n",__FUNCTION__,state->lastber, state->snr); + cx24123_readreg(state, 0x1e)); - *ber = state->lastber; + dprintk("%s: BER = %d\n",__FUNCTION__,*ber); return 0; } @@ -841,19 +822,13 @@ static int cx24123_read_signal_strength(struct dvb_frontend* fe, u16* signal_str static int cx24123_read_snr(struct dvb_frontend* fe, u16* snr) { struct cx24123_state *state = fe->demodulator_priv; - *snr = state->snr; - dprintk("%s: read S/N index = %d\n",__FUNCTION__,*snr); + /* Inverted raw Es/N0 count, totally bogus but better than the + BER threshold. */ + *snr = 65535 - (((u16)cx24123_readreg(state, 0x18) << 8) | + (u16)cx24123_readreg(state, 0x19)); - return 0; -} - -static int cx24123_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) -{ - struct cx24123_state *state = fe->demodulator_priv; - *ucblocks = state->lastber; - - dprintk("%s: ucblocks (ber) = %d\n",__FUNCTION__,*ucblocks); + dprintk("%s: read S/N index = %d\n",__FUNCTION__,*snr); return 0; } @@ -955,8 +930,6 @@ struct dvb_frontend* cx24123_attach(const struct cx24123_config* config, /* setup the state */ state->config = config; state->i2c = i2c; - state->lastber = 0; - state->snr = 0; state->VCAarg = 0; state->VGAarg = 0; state->bandselectarg = 0; @@ -1009,7 +982,6 @@ static struct dvb_frontend_ops cx24123_ops = { .read_ber = cx24123_read_ber, .read_signal_strength = cx24123_read_signal_strength, .read_snr = cx24123_read_snr, - .read_ucblocks = cx24123_read_ucblocks, .diseqc_send_master_cmd = cx24123_send_diseqc_msg, .diseqc_send_burst = cx24123_diseqc_send_burst, .set_tone = cx24123_set_tone, |
