[linux-dvb] [PATCH] Add support for DViCO FusionHDTV5 USB Gold

Michael Krufky mkrufky at gmail.com
Sun Jan 1 18:40:39 CET 2006


On 1/1/06, Andreas Oberritter <obi at linuxtv.org> wrote:
> Hi Michael,
>
> On Sat, 2005-12-31 at 18:24 -0500, Michael Krufky wrote:
> > +static int cxusb_lgh064f_tuner_attach(struct dvb_usb_device *d)
> > +{
> > +       u8 bpll[4];
> > +       bpll[2] &= ~0x20;
> > +       bpll[2] |= 0x18;
> > +       bpll[3] = 0x50; /* 0x50 - digital, 0x20 - analog */
> > +       d->pll_addr = 0x61;
> > +       memcpy(d->pll_init,bpll,4);
>
> I don't know what this code shall do, but bpll contains uninitialized
> (i.e. random) values.
>
Andreas,

You are correct about that.....   The uninitialized values, in this
case, are irrelevant.  The point is that bit 3 must be unset, and bits
4 and 5 must be set.  This exact thing is also being done in
tuner-core.c, ~ line 214.

I COULD just set bpll = { 0x00, 0x00, 0x18, 0x50 } , but I didn't
think it was actually necessary, and I wanted the code to look the
same as the other code for this tuner.

Do I have to make this change?  ...or is it okay as-is?

-Mike



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