Re: VIA SATA not recognizing drives

[Marc Singer <elf@buici.com>]

On Wed, May 19, 2004 at 10:14:38PM -0400, Jeff Garzik wrote:
> >  2) Libata does have an MMIO mode, nice.  My platform is ARM.  While
> >     these calls will work, I have a further requirement that all
> >     register IO must be followed by the hokey-pokey to work around
> >     some oddities in the hardware.  Yes, I've suggested that they fix
> >     the problem in hardware.  So, how can be make this configurable?
> >     For me, it is OK that all IDE io would require the hack.  In
> >     other words, even if there were another IDE controller that
> >     worked properly it would be OK for both to need the hack.
> 
> Everything is done via custom hooks you provide, in struct 
> ata_port_operations.

Nice.

> >  4) Is ata_piix.c the model? 
> 
> I don't know your hardware at all, so I cannot say.
> 
> All of drivers/scsi/ata_*.c drivers/scsi/sata_*.c are the model :)

OK.  That's helpful.

> >It doesn't really look that tough.  The only thing I'm unclear about
> >is how to handle read/write with the requisite hokey-pokey.
> 
> libata needs a hook for PIO data xfer, since it is currently hardcoded 
> to use outsl() and insl().  Other than that, existing 
> ata_port_operations hooks can do that "hokey-pokey".

Excellent.  Thanks.