Updated MPC5200B support (pcm030, kp-mcb2, ...)

Updated MPC5200B support (pcm030, kp-mcb2, ...)

[Carsten Schlote]

Hi,

yesterday I spent some time to get BareBox up and running on MPC5200B
again. Finally I got it working on our hardware. Not yet tested for
phytec pcm030, but I'm sure that without some fixes it won't work out of
the box.

I found and hacked/fixed the following problems so far:
- cfi_flash driver has problems with big-endian. Some byte swapping is
done in readb()/writeb() at HW access layer and also at several other
places in the CFI driver. Swapping things twice isn't exactly what the
driver and the flashdevice expects and needs a lot of more cleanups.
- Detection of flash/bank layout was hacked to workaround 'faulty'
values read from flash device (might be also a chip or HW design
problem, I need to check that in more detail)
- CFI flash buffer writes are broken with big-endian as well
- Some problems and old bugs from the u-boot-v1 era found in cpu_init.c.
Fortunately the HW did the right things although some register setups
were broken.
- Missing headers for arch/ppc to compile the liblzo code.
(unsigned.h ?)

Now with network, flash and basic debugging outputs available I would
like to port some more drivers and at least RO filesystems (fat, jffs2,
ext2/3/4) for MPC5xxx platform and replace the stone-age crappy u-boot
asap.

Just in case - Is there any on-going or even experimental work for MPC I
could start with?


-- 
Carsten Schlote <c.schlote@konzeptpark.de>
konzeptpark.de

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