linux-kernel - Promise 20319 chipset specs opened

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Date:	Thu, 02 Nov 2006 00:12:26 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	"linux-ide@...r.kernel.org" <linux-ide@...r.kernel.org>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Promise 20319 chipset specs opened

Promise has given me permission to post hardware programming info for 
one of their chips (Linux driver: sata_promise), PDC20319.  This also 
marks the first open chipset for Promise (AFAIK), so let's give them a 
round of applause.

The PDC20319 is a reasonably representative example of the hardware 
programming interface covered by sata_promise.  Kernel developers 
wishing to work on sata_promise can study this doc, and deduce how the 
two-port PDC2037x chips work.

In addition to describing the "packet" format for ATA and ATAPI 
commands, this doc also describes how to use the chip's XOR RAID-assist 
features.  I think it would be cool if someone so motivated found a way 
to use this efficiently under Linux.

The doc:
	http://gkernel.sourceforge.net/specs/promise/pdc20319.pdf.bz2

I have also updated the list open chipsets and developer resources on 
linux-ata.org:
	http://linux-ata.org/driver-status.html#open_chipsets
	http://linux-ata.org/devel.html

Have fun!

	Jeff

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