Oliver Endriss wrote:
Helmut Auer wrote:
Helmut Auer schrieb:
With this patch my TTs1401 works much better than without.
The BER's are gon and I can receive all channels fine
AFAICS the latest patch was posted in message
http://linuxtv.org/pipermail/linux-dvb/2007-January/015251.html
After reading all messages in this thread it is not clear to me
whether the patch improves things or not.
http://linuxtv.org/pipermail/linux-dvb/2007-January/015360.html
indicates a problem with some transponders.
Unfortunately I neither have the datasheets nor the hardware to play
with. I can't tell whether it makes sense or not.
Furthermore the patch might also break an USB device which uses the
same tuner (dvb-usb driver - Pinnacle 400e DVB-S)...
We need more testing!
With Helmut's help I've prepared a new patch which solved all
tuning problems for him.
Basically the same as the previous patch, except for:
- TDA8262: set baseband gain to 9db (maximum value)
- TDA10086: toggle register 0x02 between 0x35 (tuning) and 0x00 (locked)
- STR and SNR values are inverted now.
Helmut already confirmed that it works for him.
@all TT-budget S-1401 & Pinnacle 400e DVB-S users:
Please test the attached patch.
If nobody objects I'll commit this patch on Thursday.
Oliver
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diff -r 6feceafd45d7 linux/drivers/media/dvb/frontends/tda10086.c
--- a/linux/drivers/media/dvb/frontends/tda10086.c Fri May 04 00:59:04 2007 +0200
+++ b/linux/drivers/media/dvb/frontends/tda10086.c Sat May 12 21:57:22 2007 +0200
@@ -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_fron
// 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_fron
// 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
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 d
*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
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_
dprintk ("%s\n", __FUNCTION__);
- _snr = tda10086_read_byte(state, 0x1c);
+ _snr = 0xff - tda10086_read_byte(state, 0x1c);
*snr = (_snr << 8) | _snr;
return 0;
diff -r 6feceafd45d7 linux/drivers/media/dvb/frontends/tda826x.c
--- a/linux/drivers/media/dvb/frontends/tda826x.c Fri May 04 00:59:04 2007 +0200
+++ b/linux/drivers/media/dvb/frontends/tda826x.c Sat May 12 21:44:17 2007 +0200
@@ -89,8 +89,8 @@ static int tda826x_set_params(struct dvb
buf[2] = (1<<5) | 0x0b; // 1Mhz + 0.45 VCO
buf[3] = div >> 7;
buf[4] = div << 1;
- buf[5] = 0xff; // basedband filter to max
- buf[6] = 0xfe; // gains at max + no RF attenuation
+ buf[5] = 0x77; // baseband cut-off 19 MHz
+ buf[6] = 0xfe; // baseband gain 9 db + no RF attenuation
buf[7] = 0x83; // charge pumps at high, tests off
buf[8] = 0x80; // recommended value 4 for AMPVCO + disable ports.
buf[9] = 0x1a; // normal caltime + recommended values for SELTH + SELVTL
------------------------------------------------------------------------
