Date: Tue, 27 Aug 2002 14:20:09 +0100 From: Ian Dowse <iedowse@maths.tcd.ie> To: Bruce M Simpson <bms@spc.org> Cc: mobile@FreeBSD.ORG, n_hibma@FreeBSD.ORG, joe@FreeBSD.ORG Subject: Re: USB->ATA devices Message-ID: <200208271420.aa79383@salmon.maths.tcd.ie> In-Reply-To: Your message of "Tue, 27 Aug 2002 13:20:10 BST." <20020827122010.GA5438@spc.org>
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In message <20020827122010.GA5438@spc.org>, Bruce M Simpson writes: >The exception to the rule would seem to be devices behind USB->ATA bridges; >some of the bridge chips on the market (OnSpec for example) implement a >protocol which is nonstandard and is composed of the ATA task register file >writes one would normally make in the ISA or PCI i/o address space. If you're interested, I wrote a functional but incomplete driver for a similar device, the Prolific Technology PL2307 bridge. I just implemented the conversion for a minimal set of ATA commands in the driver itself; it would obviously be better to have the ATA layer in a separate driver though. The code for that driver is at: http://www.maths.tcd.ie/~iedowse/FreeBSD/uplata.tgz Ian To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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