Re: NetBSD port for AT91SAM9G20?

On Sep 5, 2012, at 11:50 AM, [email protected] wrote:

> Warner Losh <[email protected]> writes:
>=20
>> On Sep 5, 2012, at 12:43 AM, Jukka Marin wrote:
>>=20
>>> The main features of our current hardware are:
>>> - AT91SAM9G20 MCU (400 MHz)
>>> [...]
>>=20
>> Apart from a few clocks, this should work with the AT91SAM9260 =
support
>> that's in the tree.  The device tables/trees are the same, and the
>> errata for the devices are quite similar.
>=20
> Yes, maybe you'll have to add the CPU id to at91/at91dbgu* for it to =
be
> recognized correctly but that should be it.

You might want to look at FreeBSD's cpu identification.  I think I have =
all the SAM9 CPUs plus the RM9200 accounted for, plus autoprobing for =
the dbgu unit, which differs from SoC to SoC.

> However, be warned that the ethernet MAC will not work because the =
code
> currently intree is for another type of AT91 processor which has
> sufficiently different characteristics wrt number of RX and TX buffers
> and maximum sizes of these, although it will probably attach correctly
> and might be able to send short packets by chance.

I'd forgotten that detail.  FreeBSD's driver copes with both (plus =
there's a driver that just talks to the new hardware).

> I started a rewrite of it for the at91sam9260 but ran out of time. If
> other developers want smaller hardware than what Jukka offers to
> experiment, Propox sells small cards with an option for a at91sam9g20
> CPU.
>=20
> http://www.propox.com/products/t_232.html
> http://www.propox.com/products/t_231.html

Couldn't figure out how buy these in the US.  They are about US$110 if I =
read things right.  I recently got a nice little board from Glomation =
that ships quickly and is cheap (starting at US$55 for the low end up to =
about $95 for the high end in Q1 lot sizes).

	http://www.glomationinc.com/products.html

The GESBC-9G20u is the $55 one.  You have to write for a pricelist for =
the other boards, but they are very responsive to email.

Warner=