PCMCIA fun

[David Hinds]

On Thu, Mar 18, 2004 at 10:14:44AM +0100, Geert Uytterhoeven wrote:
> 
> That's a bug in rsrc_mgr.c: since PCMCIA is ISA, it should use isa_readl()
> instead of readl().

This is not a true statement.  PCMCIA is no more ISA or PCMCIA than,
say, SCSI.  It only describes the point-to-point interface to a
device, and PCMCIA interfaces may appear on ISA, PCI, SBUS, etc host
busses.

> > - drivers/net/pcmcia/pcnet_cs.c:
> >   The first one I tried (since it's my normal Ethernet card). It didn't
> >   compile cleanly: it uses __raw_writew() and __raw_readw() to transfer
> >   date to/from the shared memory buffer on some cards, and we don't have
> >   those. I'm not sure how to define them though, should they be "native"
> >   byte order? That would mean I have to byte-swap them on Gayle, right?
> >   I can't test these since I don't have a shared-memory NE2000 clone.
> 
> Ugh, __raw_{write,read}w() are architecture-dependant, and not to be used by
> common code.

I'm not sure I follow.  All low-level IO services are architecture
dependant, right?  Do you mean that the existence of these calls is
architecture dependant?  They seem to be available on at least all
widely used architectures, and while many drivers do not use them,
there are quite a few that do.

-- Dave