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add support for PLS

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This commit is contained in:
Ralph Metzler
2017-08-11 16:03:45 +02:00
parent a44dbc889b
commit 5c032058b9
1 changed files with 25 additions and 5 deletions
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30
frontends/mxl5xx.c
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@@ -424,9 +424,22 @@ static int get_algo(struct dvb_frontend *fe)
return DVBFE_ALGO_HW;
}
/*
static int cfg_scrambler(struct mxl *state)
/* This should maybe go into dvb-core/dvb_math.c */
static u32 gold2root(u32 gold)
{
u32 x, g;
if (gold >= 0x3ffff)
gold = 0;
for (g = 0, x = 1; g < gold; g++)
x = (((x ^ (x >> 7)) & 1) << 17) | (x >> 1);
return x;
}
static int cfg_scrambler(struct mxl *state, u32 gold)
{
u32 root;
u8 buf[26] = {
MXL_HYDRA_PLID_CMD_WRITE, 24,
0, MXL_HYDRA_DEMOD_SCRAMBLE_CODE_CMD, 0, 0,
@@ -435,11 +448,18 @@ static int cfg_scrambler(struct mxl *state)
0, 0, 0, 0, 1, 0, 0, 0,
};
if (gold != NO_SCRAMBLING_CODE)
root = gold2root(gold);
else
root = 1;
buf[25] = (root >> 24) & 0xff;
buf[24] = (root >> 16) & 0xff;
buf[23] = (root >> 8) & 0xff;
buf[22] = root & 0xff;
return send_command(state, sizeof(buf), buf);
}
*/
static int CfgDemodAbortTune(struct mxl *state)
{
MXL_HYDRA_DEMOD_ABORT_TUNE_T abortTuneCmd;
@@ -510,7 +530,7 @@ static int set_parameters(struct dvb_frontend *fe)
demodChanCfg.rollOff = MXL_HYDRA_ROLLOFF_AUTO;
demodChanCfg.modulationScheme = MXL_HYDRA_MOD_AUTO;
demodChanCfg.pilots = MXL_HYDRA_PILOTS_AUTO;
//cfg_scrambler(state);
cfg_scrambler(state, p->pls);
break;
default:
return -EINVAL;