[9fans] updated firmware for latest Raspberry Pi boards

[9fans] updated firmware for latest Raspberry Pi boards

[Richard Miller]

I recently acquired another pi and found it wouldn't boot with any of
my existing sd cards.  It seems there has been a hardware change at
some point (new RAM chip?) which requires a new version of the
firmware which runs on the Broadcom GPU.

I've updated the dos partition of the sd card image in /contrib/miller
with newer firmware files which work for me.  If you want to update an
already installed 9pi image for a new pi, you can get the files from
  https://github.com/raspberrypi/firmware/tree/master/boot
But at the moment, it's best not to use the very latest firmware, because
a change was made on 18 September which breaks usb quite badly for Plan 9.
[See .../raspberrypi/firmware/issues/214 for details if you're curious.]

I hope this will be sorted out eventually, but meanwhile you can follow
the History link on the above page and use a version earlier than this date.

Re: [9fans] updated firmware for latest Raspberry Pi boards

[Richard Miller]

> But at the moment, it's best not to use the very latest firmware, because
> a change was made on 18 September which breaks usb quite badly for Plan 9.

The firmware developers have now fixed this (by reverting the change, I think),
so it should be safe from now on to use the most up to date start_cd.elf file.