[linux-dvb] Re: Patch for cards with the Philips CD1516 tunerbox (spXXXX?)

[Holger Waechtler <holger@convergence.de>]

thanks Juha, I applied this and cleaned things a little up. Could you 
please test again?

thanks,

Holger



Juha Yrjölä wrote:
> Hi,
> 
> On Tue, Oct 15, 2002 at 01:41:48AM +0300, Marko Kenttälä wrote:
> 
> 
>>Same for me with Siemens DVB-C rev. 1.5. Here's a patch that I can get 
>>sometimes to tune to QAM128 channels. It seems that there are either 
>>different versions of Siemens DVB-C boards or differences in cable 
>>transmissions because same code do not work for every Siemens user. 
>>REL-0-9-2 tunes every time to QAM128 for me but I get some glitches every 
>>now and then, QAM64 is perfect in both newstruct and REL-0-9-2.
> 
> 
> --- DVB/driver/frontends/ves1820.c.bak  Tue Oct 15 00:38:03 2002                
> +++ DVB/driver/frontends/ves1820.c      Tue Oct 15 01:30:58 2002                
> @@ -151,7 +151,7 @@ 
>  int tuner_set_tv_freq (struct dvb_frontend *frontend, u32 freq, u8 pwr)
>  {
>          u32 div;
> -       static int freq_mod [] = { 36750000, 36125000 };
> +       static int freq_mod [] = { 36125000, 36125000 };
> 
> After this, the locking frequencies on my Siemens rev1.3 board are
> shifted exactly 625 kHz upwards. (i.e. what once used to lock at
> 150000 kHz now locks at 150625 kHz.) I know for certain that
> 150000 kHz should be the right frequency, since this is what both the
> cable operator and a Hauppauge DVB-C card tells me. Maybe we might
> try with different freq_mod values depending on the revision.
> 
> @@ -168,7 +168,7 @@
>                 buf[3] = (freq < 174000000 ? 0x88 :
>                           freq < 470000000 ? 0x84 : 0x81) | (pwr << 6);
>         } else {
> -               freq += freq_mod[tuner_type];
> +               /*freq += freq_mod[tuner_type];*/
>                 buf[2] |= pwr << 6;
>                 buf[3] = (freq < 174000000 ? 0xa1 :
>                           freq < 454000000 ? 0x92 : 0x34);
> 
> This doesn't seem to break anything, at least with me. I can still lock
> to all channels. I think the patch is correct; the frequency addition
> is not needed there.
> 
> Cheers,
> Juha
> 
> 



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