Hi,
I have reworked the BSBE1 tuner support in bsbe1.h to follow the ALPS-
recommended parameters more closely.
Tests with BSBE1-based Activy cards showed reduced BER.
Cards affected:
- driver dvb-ttpci(av7110): Hauppauge/TT Nexus-S rev 2.3
- driver budget-ci: TT S-1500 PCI
Please test and report any problems. Thanks!
CU
Oliver
--
----------------------------------------------------------------
VDR Remote Plugin 0.4.0: http://www.escape-edv.de/endriss/vdr/
----------------------------------------------------------------
diff -r f24051885fe9 linux/drivers/media/dvb/frontends/bsbe1.h
--- a/linux/drivers/media/dvb/frontends/bsbe1.h Tue Mar 18 18:10:06 2008 -0300
+++ b/linux/drivers/media/dvb/frontends/bsbe1.h Wed Apr 09 02:35:53 2008 +0200
@@ -1,5 +1,5 @@
/*
- * bsbe1.h - ALPS BSBE1 tuner support (moved from av7110.c)
+ * bsbe1.h - ALPS BSBE1 tuner support
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -30,40 +30,20 @@ static u8 alps_bsbe1_inittab[] = {
0x02, 0x30,
0x03, 0x00,
0x04, 0x7d, /* F22FR = 0x7d, F22 = f_VCO / 128 / 0x7d = 22 kHz */
- 0x05, 0x35, /* I2CT = 0, SCLT = 1, SDAT = 1 */
- 0x06, 0x40, /* DAC not used, set to high impendance mode */
- 0x07, 0x00, /* DAC LSB */
+ 0x05, 0x05, /* I2CT = 0, SCLT = 1, SDAT = 1 */
+ 0x06, 0x00, /* DAC not used */
0x08, 0x40, /* DiSEqC off, LNB power on OP2/LOCK pin on */
0x09, 0x00, /* FIFO */
0x0c, 0x51, /* OP1 ctl = Normal, OP1 val = 1 (LNB Power ON) */
0x0d, 0x82, /* DC offset compensation = ON, beta_agc1 = 2 */
- 0x0e, 0x23, /* alpha_tmg = 2, beta_tmg = 3 */
- 0x10, 0x3f, // AGC2 0x3d
+ 0x0f, 0x92,
+ 0x10, 0x34, /* AGC2 */
0x11, 0x84,
0x12, 0xb9,
- 0x15, 0xc9, // lock detector threshold
- 0x16, 0x00,
- 0x17, 0x00,
- 0x18, 0x00,
- 0x19, 0x00,
- 0x1a, 0x00,
- 0x1f, 0x50,
- 0x20, 0x00,
- 0x21, 0x00,
- 0x22, 0x00,
- 0x23, 0x00,
- 0x28, 0x00, // out imp: normal out type: parallel FEC mode:0
- 0x29, 0x1e, // 1/2 threshold
- 0x2a, 0x14, // 2/3 threshold
- 0x2b, 0x0f, // 3/4 threshold
- 0x2c, 0x09, // 5/6 threshold
- 0x2d, 0x05, // 7/8 threshold
- 0x2e, 0x01,
- 0x31, 0x1f, // test all FECs
- 0x32, 0x19, // viterbi and synchro search
- 0x33, 0xfc, // rs control
- 0x34, 0x93, // error control
- 0x0f, 0x92,
+ 0x15, 0xc9, /* lock detector threshold */
+ 0x28, 0x00, /* out imp: normal out type: parallel FEC mode:0 */
+ 0x33, 0xfc, /* rs control */
+ 0x34, 0x93, /* error control */
0xff, 0xff
};
@@ -100,11 +80,11 @@ static int alps_bsbe1_tuner_set_params(s
if ((params->frequency < 950000) || (params->frequency > 2150000))
return -EINVAL;
- div = (params->frequency + (125 - 1)) / 125; // round correctly
+ div = params->frequency / 1000;
data[0] = (div >> 8) & 0x7f;
data[1] = div & 0xff;
- data[2] = 0x80 | ((div & 0x18000) >> 10) | 4;
- data[3] = (params->frequency > 1530000) ? 0xE0 : 0xE4;
+ data[2] = 0x80 | ((div & 0x18000) >> 10) | 1;
+ data[3] = 0xe0;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
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