SAM9G45 (was: sheevaplug boot from nandfs hangs)

Bernd Walter ticso at
Mon Dec 17 13:03:06 UTC 2012

On Sat, Dec 15, 2012 at 06:27:12PM -0700, Warner Losh wrote:
> On Dec 15, 2012, at 6:04 PM, Ian Lepore wrote:
> > On Sun, 2012-12-16 at 01:08 +0100, Bernd Walter wrote:
> >> On Sat, Dec 15, 2012 at 11:18:57AM -0700, Ian Lepore wrote:
> >>> Wow, this is all very familiar.  I had this exact situation a couple
> >>> months ago as I was trying to get freebsd running on my pico-sam9g45
> >> 
> >> You have a SAM9G45 running?
> >> 
> > 
> > Yeah, this board:
> > 
> > The mci driver is stuck in "1 sector at a time" mode (slow) because all
> > the workarounds for the rm9200 errata seem to interfere with the new
> > less-buggy mci hardware.  I think I just need to write a new driver from
> > scratch for the new hardware rev.  I've also got ehci working for it.
> The G45 also has newer MCI control (with different DMA) than the old RM9200 or the SAM9260 boards.
> > I did some pretty ugly stuff in the at91 directory to get it going.  I
> > was just hacking to get it working, then I was going to work with Warner
> > to clean up what I had done and get it committed, but both his and my
> > lives got busy and nothing much has happened for 2 months now.  But it
> > does sit here on my desk running just fine (and notably not ever
> > crashing or anything).  Pretty much I've been using it when I need to
> > see a freebsd 10 manpage, but not much else. :)
> I've wanted to do more, and had planned on using my G45 for my sprinkler control panel (which would include LCD support), but $WORK has been kinda busy, and life has been over-full...

Unfortunately I'm also low on time, but I have two g45 boards:
Have them together with different devboards - one with display.

> > I heard a rumor that the hardware guys at work are taking a look at
> > using a G45 for an upcoming project.  If that happens, that'll ensure a
> > better mci driver gets written.
> Yea, if I don't beat you to it...
> > If you need a patchset and are willing to deal with the ugly half-baked
> > nature of what I've got, just let me know.
> Has it changed?

B.Walter <bernd at>
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.

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