[coreboot] Schematics and PCB design for ASMB4 (Was: There are ASMB5's on fleabay right now for $30/ea (firmware storage module required for OpenBMC on the KGPE-D16/KCMA-D8))

Timothy Pearson tpearson at raptorengineering.com
Sun Nov 4 21:21:10 CET 2018

Hash: SHA256

On 11/03/2018 01:51 PM, Daniel Gröber wrote:
> On Sat, Nov 03, 2018 at 01:28:06PM -0500, Timothy Pearson wrote:
>> Very nice work!  I too had been intending to work on this at some
>> nebulous date in the future, great to see it actually done and boards
>> ordered!
> I did it as soon as I got a KGPE-D16 which included the module as a
> surprise :). I had been trying to get just the module for my KCMA-D8
> for a while too.
> Since it was unobtainium at the time I figured I'd just do it quickly
> so I can copy it for myself. It really just took an afternoon or so to
> do the physical probing and component identification.
>> Quick question -- how are you handling MAC allocation?  Each module
>> comes with the MAC address on a sticker; the mainboard itself doesn't
>> have a MAC allocated to the BMC port until the module is installed.
> Full disclosure: I haven't actually looked at the software side of the
> BMC yet, so I wouldn't mind some pointers to what coreboot patches are
> required these days etc.
> Generally speaking it's always possible to just allocate "locally
> administered" MAC addresses either randomly on first boot-up or by
> having the user do it at flash time so it's not really a big deal IMO.
> I hadn't intended to pre-flash these modules since it's just another
> SPI flash for which coreboot user are likely to already have a
> programmer anyways. If enough people are interested in it I could look
> into that though.
> --Daniel

Since Raptor has the ability to allocate official MACs (non-local),
which can be useful at the enterprise level via DHCP pinning, I might
see if we can reactivate our existing BMC flash offering, but based on
your hardware if that's OK with you.  Those are preflashed modules for
plug+play use; we only stopped offering them because of the prior
scarcity of the ASMB4 modules and lack of a replacement.

- -- 
Timothy Pearson
Raptor Engineering
+1 (415) 727-8645 (direct line)
+1 (512) 690-0200 (switchboard)
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