On Sat, Jun 05, 2021 at 01:41:22PM +1200, Michael Schmitz wrote:
Am 05.06.2021 um 10:49 schrieb Brad Boyer:
I don't see anything in drivers/pcmcia that is obviously an m68k
system even though I'm pretty sure I remember discussions of supporting
such hardware in the past.
There's the APNE driver (Amiga PCMCIA NE2000 clone), which is already
catered for by the current code in io_mm.h. I remember seeing patches for
that driver that would allow support of a variant of the APNE card that were
hard to integrate in the current NE clone code framework. Didn't consider
adding another isa_type for that card at the time - I'll revisit these
patches if I can find them again.
Supporting PB190 PCMCIA hardware requires adding a new isa_type and the
corresponding IO translation cases. Not much more, for all I can see.
Existing chipset drivers from other architectures ought to work already.
Maybe add a specific block_input() hook as for APNE (but I surmise that
might just be code duplication from generic code in lib8390.c - didn't
check).
Not sure what card socket code the APNE driver uses - must be one of the
generic variants from drivers/pcmcia. If your PB190 needs something not
already in there, we'd need to add that as well.
I had to look a bit, but I found it. The apne driver doesn't use the
normal PCMCIA infrastructure at all. There is a custom Amiga PCMCIA
thing found in arch/m68k/amiga/pcmcia.c. This could complicate things
if we are able to use the common PCMCIA code for trex and try to
build a kernel with both that and amiga/pcmcia + apne.
At least it does sound like the io macros won't be an issue.
Brad Boyer
flar@xxxxxxxxxxxxx
