Re: IDE?

From: Vojtech Pavlik (
Date: Sat Aug 17 2002 - 16:59:42 EST

On Sat, Aug 17, 2002 at 09:22:39AM +0100, Russell King wrote:

> On Fri, Aug 16, 2002 at 06:35:29PM -0700, Linus Torvalds wrote:
> > And then in five years, in Linux-3.2, we might finally just drop support
> > for the old IDE code with PIO etc. Inevitably some people will still use
> > it (the same way some people still use Linux-2.0 with hd.c), but it won't
> > have been in the way for making a cleaner driver in the meantime.
> I think you're being too ""mainstream" orientated" here. Let's look
> at something called PCMCIA. PCMCIA CF cards. They're IDE devices
> that only do PIO.
> The majority of ARM platforms being actively produced today provide a
> PCMCIA or CF (_not_ cardbus) socket. Neither PCI nor Cardbus makes any
> sense in these machines. Why? Because they're not your average power
> hungry desktop box that's always plugged into the mains supply.
> I think we're going to have PIO mode IDE around for a fair (ten at
> least?) number of years yet.

We'll need PIO for control commands anyways, but the thing is that we
won't need to speed optimize PIO and will be able to kill multi-sector
PIO completely probably.

Vojtech Pavlik
SuSE Labs
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