On Sat, Apr 21, 2012 at 17:44, Michael Schmitz
<[email protected]> wrote:
>>> If someone ever comes up with a way to hook up a fully featured ISA
>>> slot to the ROM port (mapping ports 0x00 to 0x7f to IO and above to
>>> mem access should be possible) we might revisit the code. For now,
>>> anything except for 8 bit IO can be turned into dummy functions or
>>> compile warnings.
>>
>> Might be nice, if possible. But for now, that would indeed be
>> the way to go (and clean up code).
>
> I've had a look at the NetUSBee docs and see that the USB part of it does
> require 8 bit writes but little endian 16 bit reads. So we will need to
> retain the 16 bit reads for potential USB support there.
OK. But you ain't gonna get the right 16 bits using
#define rom_in_be16(addr) \
({ u16 __v = (*(__force volatile u16 *) (addr)); __v >>= 8; __v; })
#define rom_in_le16(addr) \
({ u16 __v = le16_to_cpu(*(__force volatile u16 *) (addr));
__v >>= 8; __v; })
as they both do a 16-bit read and shift the result.
Perhaps it should just be a 32-bit read instead?
Are the schematics publicly available?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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