I recently purchased a Raspberry Pi 400, which is supposed to be a Raspberry Pi
4 already inside a keyboard. I thought it would be great to get a plan 9
terminal on it. However, I am having some trouble; and I don’t know if it is
specific to the Pi 400, myself, or both.
The Pi 400 is the Raspberry Pi keyboard with a ‘Pi 4’ inside. However, the
Raspberry Pi 4 is on a different piece of copper. I don’t know how significant
this is or not.
Anyway, I downloaded the new 9front image and first used dd to get it onto a
32GB micro SD card.
On first boot, the Plan 9 kernel appears to start loading, and then I got the
following error repeated over and over
sdhc: read error intr 2008002 stat 1fff0000
and then finally /dev/sdM0/data
bootargs is (tcp, tls, il, local!device)
I’ve tried creating images on the Pi itself in Raspian. Tried booting off of a
USB to micro SD adapter - all with similar results, possibly different or
additional errors. I also tried using balenaEtcher to transfer the image…
similar results.
One attempted startup looked like this:
127 holes free
0x004f0000 0x3e600000 1041301504
1041301504 bytes free
Plan 9
cpu0: 1500 MHz ARM Cortex-A72 r0p3
4006M Memory: 998M kernel data, 3008M user, 15011M swap
pcienable PCI.0.0.0: pcr 0->7
pcienable PCI.1.0.0: pcr 0->2
bus dev type vid did intl memory
0 0/0 06 04 00 14e4 2711 0 ioa:00000000-00001000 4096
nema:600000000-600100000 1048576 ->1
1 0/0 0c 03 30 1106 3483 0 0:600000007 4096
#l0: genet: 1000Mbps port 0xFFFFFFFFBD580000 irq 189 ea dca632e63357
usbxhci: 0x1106 0x3483: port 600000000 size 4096 irq 0
cpu3: 1500MHz ARM Cortex-A72 r0p3
cpu2: 1500MHz ARM Cortex-A72 r0p3
cpu1: 1500MHz ARM Cortex-A72 r0p3
#l0: phy1 id 600d84a2 oui 80361
emmc: cmd 371a0000 arg 0 error intr 0 stat 1fff0001
{repeats 15 times}
/dev/sdM0: BCM SD Host Controller 02 Version 10
emmc: cmd 371a0000 arg 0 error intr 0 stat 1fff0001
{repeats 10 times}
/dev/sdM0/data
bootargs is (tcp, tls, il, local!device)[]
As mentioned before, where that emmc error is - I’ve seen the previous
mentioned error repeated. Or the following two errors.
sdhc: read error intr 2008000 stat 1fff0206
emmccmd: need to reset Datainhibit intr 0 stat 1fff0206
I realize this may be because I need a different firmware for the Pi 400. I see
what looks like a file on github for the Pi 400. But I am not sure what to do
with it. Is it supposed to be as easy as copying it to the boot partition? (I
tried that and didn’t work). Do I need to recompile a kernel? Do I need to
update the other files in the boot partition with those for the bootloader
firmware for the Pi?
Thanks in advance!
Mack
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