RE: Assorted bugs in the PIIX drivers

["SMALL, Timothy" <timothy.small@astrium.eads.net>]

This looks like the MPIIX datasheet:

http://www.mit.edu/afs/sipb/contrib/doc/specs/unfiled/i82371MX.pdf

Also, may or may not want to bother with looking at supporting another chip
- the never-actually-released-by-Intel i82600 integrated single chip
north/south bridge.  This chipset design (can you still call it a chipset if
it only has one chip?) is licensed from Intel, and sold by Radisys.  The
docs are here:

http://www.radisys.com/service_support/tech_solutions/techsupportlib_detail.
cfm?ProductID=1262

I have it working fine with the ide/pci driver in PIO, and UDMA, but not
MDMA modes, but haven't had a chance to revisit it, but it is on my TODO
list...

Tim.


> -----Original Message-----
> From: Alan Cox [mailto:alan@lxorguk.ukuu.org.uk] 
> Sent: Friday, November 25, 2005 2:43 PM
> To: linux-ide@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: Assorted bugs in the PIIX drivers
> 
> 
> I finally got all the documents rounded up to try and redo 
> Jgarzik's PIIX driver a bit more completely (I'm short MPIIX 
> if anyone has it ?)
> 
> I then started reading the docs and the code and noticing a 
> couple of problems
> 
> 1.	We set IE1 on PIO0-2 which the docs say is for PIO3+
> 
> 2.	The ata_piix one (but not the ide/pci one) have shifts 
> wrong so that
> the secondary slave timings are half loaded into the primary slave
> 
> 
> I'm also not clear if the "no MWDMA0" list has been updated 
> correctly for the newer chipsets.
> 
> I've yet to review the DMA programming, just the PIO so far.
> 
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