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| author | Oliver Endriss <o.endriss@gmx.de> | 2007-05-28 23:06:27 +0200 |
|---|---|---|
| committer | Oliver Endriss <o.endriss@gmx.de> | 2007-05-28 23:06:27 +0200 |
| commit | 7c6944ea418de5fd6663e249594380a925c33253 (patch) | |
| tree | c46587a0652a8e57c52c7b467317ec0e12a371f2 /linux/drivers/media/dvb/frontends/tda10086.c | |
| parent | 599566a6b844b0086539e650336feada4b3e5bbb (diff) | |
| download | mediapointer-dvb-s2-7c6944ea418de5fd6663e249594380a925c33253.tar.gz mediapointer-dvb-s2-7c6944ea418de5fd6663e249594380a925c33253.tar.bz2 | |
tda10086,tda826x: fix tuning, STR/SNR values
From: Oliver Endriss <o.endriss@gmx.de>
Several people reported unreliable reception with the current driver.
Furthermore, STR and SNR values seem to be inverted.
This fix is based on a patch posted by Hartmut Hackman.
Thanks to Helmut Auer for testing and helping to optimize the patch.
tda826x:
- set baseband cut-off to 19 MHz
tda10086:
- change the parameters of the carrier recovery loop
- toggle register 0x02 between 0x35 (tuning) and 0x00 (locked)
- invert STR and SNR values
Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Thanks-to: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Thanks-to: Helmut Auer <vdr@helmutauer.de>
Diffstat (limited to 'linux/drivers/media/dvb/frontends/tda10086.c')
| -rw-r--r-- | linux/drivers/media/dvb/frontends/tda10086.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/linux/drivers/media/dvb/frontends/tda10086.c b/linux/drivers/media/dvb/frontends/tda10086.c index ccc429cbb..0f2d4b415 100644 --- a/linux/drivers/media/dvb/frontends/tda10086.c +++ b/linux/drivers/media/dvb/frontends/tda10086.c @@ -41,6 +41,7 @@ struct tda10086_state { /* private demod data */ u32 frequency; u32 symbol_rate; + bool has_lock; }; static int debug = 0; @@ -116,7 +117,7 @@ static int tda10086_init(struct dvb_frontend* fe) // misc setup tda10086_write_byte(state, 0x01, 0x94); tda10086_write_byte(state, 0x02, 0x35); // NOTE: TT drivers appear to disable CSWP - tda10086_write_byte(state, 0x03, 0x64); + tda10086_write_byte(state, 0x03, 0xe4); tda10086_write_byte(state, 0x04, 0x43); tda10086_write_byte(state, 0x0c, 0x0c); tda10086_write_byte(state, 0x1b, 0xb0); // noise threshold @@ -146,7 +147,7 @@ static int tda10086_init(struct dvb_frontend* fe) // setup AGC tda10086_write_byte(state, 0x05, 0x0B); tda10086_write_byte(state, 0x37, 0x63); - tda10086_write_byte(state, 0x3f, 0x03); // NOTE: flydvb uses 0x0a and varies it + tda10086_write_byte(state, 0x3f, 0x0a); // NOTE: flydvb varies it tda10086_write_byte(state, 0x40, 0x64); tda10086_write_byte(state, 0x41, 0x4f); tda10086_write_byte(state, 0x42, 0x43); @@ -398,6 +399,10 @@ static int tda10086_set_frontend(struct dvb_frontend* fe, dprintk ("%s\n", __FUNCTION__); + // modify parameters for tuning + tda10086_write_byte(state, 0x02, 0x35); + state->has_lock = false; + // set params if (fe->ops.tuner_ops.set_params) { fe->ops.tuner_ops.set_params(fe, fe_params); @@ -542,8 +547,14 @@ static int tda10086_read_status(struct dvb_frontend* fe, fe_status_t *fe_status) *fe_status |= FE_HAS_VITERBI; if (val & 0x08) *fe_status |= FE_HAS_SYNC; - if (val & 0x10) + if (val & 0x10) { *fe_status |= FE_HAS_LOCK; + if (!state->has_lock) { + state->has_lock = true; + // modify parameters for stable reception + tda10086_write_byte(state, 0x02, 0x00); + } + } return 0; } @@ -555,7 +566,7 @@ static int tda10086_read_signal_strength(struct dvb_frontend* fe, u16 * signal) dprintk ("%s\n", __FUNCTION__); - _str = tda10086_read_byte(state, 0x43); + _str = 0xff - tda10086_read_byte(state, 0x43); *signal = (_str << 8) | _str; return 0; @@ -568,7 +579,7 @@ static int tda10086_read_snr(struct dvb_frontend* fe, u16 * snr) dprintk ("%s\n", __FUNCTION__); - _snr = tda10086_read_byte(state, 0x1c); + _snr = 0xff - tda10086_read_byte(state, 0x1c); *snr = (_snr << 8) | _snr; return 0; |