Date: Mon, 10 Nov 2003 16:19:27 +0100 From: Bernd Walter <ticso@cicely12.cicely.de> To: Alexander Leidinger <Alexander@Leidinger.net> Cc: current@freebsd.org Subject: Re: New EHCI device ID Message-ID: <20031110151927.GT16726@cicely12.cicely.de> In-Reply-To: <20031110155423.1bb0b145.Alexander@Leidinger.net> References: <200311091924.hA9JOP7G073292@Andro-Beta.Leidinger.net> <20031109212217.GF16726@cicely12.cicely.de> <1068418579.1822.13.camel@hood.oook.cz> <20031109231136.GI16726@cicely12.cicely.de> <20031110100320.1189515c.Alexander@Leidinger.net> <20031110121911.GL16726@cicely12.cicely.de> <20031110135002.66055c17.Alexander@Leidinger.net> <20031110125538.GP16726@cicely12.cicely.de> <20031110155423.1bb0b145.Alexander@Leidinger.net>
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On Mon, Nov 10, 2003 at 03:54:23PM +0100, Alexander Leidinger wrote: > On Mon, 10 Nov 2003 13:55:39 +0100 > Bernd Walter <ticso@cicely12.cicely.de> wrote: > > > But ehci doesn't control low/full speed ports. > > The physical ports are multiplexed between ehci and ohci/uhci ports. > > The switching is done without driver interaction. > > Attached to the port is a > > uhub1: NEC Corporation USB2.0 Hub Controller, class 9/0, rev 2.00/1.00, addr 2 > uhub1: 4 ports with 4 removable, self powered USB2 hubs are currently not supported with high speed uplinks. That's the reason why there is no EHCI support in GENERIC. EHCI needs interrupt transfers first to support usb2.0 hubs at high speed uplinks with high speed devices. For low and full speed downlink we additionaly need speed conversion support in uhub code. -- B.Walter BWCT http://www.bwct.de ticso@bwct.de info@bwct.de
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