[linux-dvb] Re: change "STEPSIZE = 0" in dvb_frontend.c for DVB-C (Siemens) very bad! (CVS-Driver > 13.05.2003)

["Uwe Scheffler" <linux_dvb@uni.de>]

Jaakko Hyvätti writes on 19.05.2003:

>  
>   Hi Uwe and sorry for your trouble, I feel responsible for breaking it
> for you as I pushed this patch to allow TechnoTrend cards to work.  But
> it seems this is the only way to get both cards working.. breaking them in
> order for someone to step up and fix both at the same time. 
Hello Jaakko! 
With your Patch i have no more problems! 
I applied to the today's CVS driver only your Patch
and i can switch the channels with these very well
without long waiting periods! :-))
(the "stepsize" is now not commentated) 


Uwe 

>   Now how do we differentiate between the cases?  Is Siemens vs TT enough?
> Maybe you could back out that stepsize thing and try this one below.
> People who know the driver better probably have something more beautiful
> to detect the card.. 
> --- frontends/ves1820.c	13 May 2003 12:55:17 -0000	1.17
> +++ frontends/ves1820.c	18 May 2003 23:16:36 -0000
> @@ -172,6 +172,7 @@
>  int tuner_set_tv_freq (struct dvb_frontend *fe, u32 freq)
>  {
>          u32 div;
> +	u32 ifreq = 36125000;
>  	static u8 addr [] = { 0x61, 0x62 };
>  	static u8 byte3 [] = { 0x8e, 0x85 };
>  	int tuner_type = GET_TUNER(fe->data);
> @@ -180,8 +181,9 @@
>  	if (tuner_type == 0xff)     /*  PLL not reachable over i2c ...  */
>  		return 0; 
> -	/* div = (freq + 36125000 + 31250) / 62500; */
> -	div = (freq + 35937500 + 31250) / 62500; /* works better for finland and sweden */
> +	if (strstr (fe->i2c->adapter->name, "Technotrend"))
> +		ifreq = 35937500;
> +	div = (freq + ifreq + 31250) / 62500;
>  	buf[0] = (div >> 8) & 0x7f;
>  	buf[1] = div & 0xff;
>  	buf[2] = byte3[tuner_type]; 

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