Geode integrated peripherals support?

[John-Mark Gurney]

Milan Obuch wrote this message on Mon, Jan 17, 2005 at 13:14 +0100:
> On Monday 17 January 2005 12:55, Bruce M Simpson wrote:
> > On Sun, Jan 16, 2005 at 03:01:17PM +0100, Milan Obuch wrote:
> > > ACCESS.bus support (i2c bus compatible) and LPC bus bridge (for
> > > expansion). The first one is present in OpenBSD. I am currently studying
> > > that and FreeBSD kernel sources to try port it, however, any help would
> > > be great. No idea on LPC, through...
> >
> > There's some i2c support in FreeBSD already, whether or not this applies
> > to the i2c hardware in the Geode I don't know. iic(4) would be a good
> > place to start.
> 
> I think so. However, I built kernel with device iic, iicbus, iicbb, but 
> nothing shows. As said, I am doing my 'homework' now - astudying sources, 
> but, as usual, any help appreciated.

Well, as having used the i2c code, I know it works...  You probably
need to look at the hardware spec, and figure out if you need to write
a iicbb device driver (one that directly controls the SCL/SDA lines), or
a higher level one, that has hardware that can issue i2c reads and wrights
directly...

I recently d/l'd the ACCESS.bus spec myself, since I have a firewire/usb2.0
card that says it's an ACCESS.bus card, but not quite (the subrev is
wrong for access.bus), and didn't realize that ACCESS.bus was so close
to i2c..  There might need to be a layer written on top of i2c to make
it appear as an access.bus and do access.bus type things..

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."