when writing to the nvme ssd, the screen can glitch out.
found this in linux lcdif driver (mxcfb) that appears to
resolve the issue.
the QoSc registers are all completely undocumented tho :-(
mdio interrupt command completion handling was broken,
as the interrupt handler would clear the mii status
register before mdiodone() sees it.
handle errors in miistatus() and miiane(), to not get
confused.
for unknown reasons, multiwrite is busted in usdhc:
sdhc: write error intr 10 stat ff88858e
usdhccmd: need to reset Datinhibit intr 10 stat ff88858e
usdhc: cmd 193a0027 arg 1e5b6b error intr 18010 stat ff88858f
i'm disabling it for now, adding a flag to the SDio struct.
do all the magic dwc3 specific initalization as well
as reset the hub and power on the phys.
with this, "usb start" command is not needed anymore
from u-boot.
This is mostly a copy of port/usbxhci.c with PCIWADDR() replaced
by PADDR() and the pci specific code stripped out.
This could be refactored at a later time.
There is a gpio line for the main hub reset that needs to be
asserted and some power management functions that are currently
done by u-boot (using "usb start" command).
We will do these ourselfs once we have the infrastructure for
it in place.
This is a work in progress port to the mntreform2 laptop.
Working so far:
- mmu (same as raspberry pi 3b+)
- arm generic timer
- gicv3
- uart1
- enet
With access to the uart, one can netboot this kernel in u-boot
using the following commands:
> dhcp
> bootm
