Re: IDE-flash device and hard disk on same controller

From: Geert Uytterhoeven (
Date: Wed Aug 21 2002 - 01:36:11 EST

On Tue, 20 Aug 2002, Jeff Garzik wrote:
> Jeff Garzik wrote:
> > Attached is the ATA core...
> Just to give a little bit more information about the previously attached
> code, it is merely a module that does two things: (a) demonstrates
> proper [and sometimes faster-than-current-linus] ATA bus probing, and
> (b) demonstrates generic registration and initialization of ATA devices
> and channels. All other tasks can be left to "personality" (a.k.a.
> class) drivers, such as 'disk', 'cdrom', 'floppy', ... types.

Looks nice (at first sight)!

But one limitation is that it always assumes the IDE ports are located in I/O
space :-(
What about architectures where IDE ports are located in MMIO space? Or worse,
have some ports in I/O space (e.g. PCI IDE card) and some in MMIO space (e.g.
SOC or mainboard IDE host interface)?



Geert Uytterhoeven -- There's lots of Linux beyond ia32 --

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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