Date: Tue, 12 Oct 2004 20:38:20 +0100 From: Ian Dowse <iedowse@maths.tcd.ie> To: Doug White <dwhite@gumbysoft.com> Cc: current@freebsd.org Subject: Re: Are USB 2 hubs supported in FreeBSD 5.3? Message-ID: <200410122038.aa83802@salmon.maths.tcd.ie> In-Reply-To: Your message of "Mon, 11 Oct 2004 19:06:35 PDT." <20041011190508.D34886@carver.gumbysoft.com>
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In message <20041011190508.D34886@carver.gumbysoft.com>, Doug White writes: >On Fri, 8 Oct 2004 bruce@zuhause.mn.org wrote: > >> Are USB 2 hubs supported? If they're not supported, is there a way >> to enable EHCI, and force a USB 2 hub to operate in USB 1 mode? > >High-speed hubs are not currrently supported. Actually, USB2 hubs should now work well enough to talk to USB2 devices (they work for me connecting USB2 umass devices anyway), but we don't have support for talking to USB1 devices via USB2 hubs yet. >I don't think ehci knows how to talk to non-high-speed devices. If you >plug a non-high-speed device into an EHCI-served port, it lets the uhci >emulation layer take over. That's the way EHCI is designed to operate; directly connected USB1 devices are handled by the companion USB1 controller, not EHCI. Ian
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