Date: Fri, 24 Feb 2006 16:28:44 +0100 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-hackers@freebsd.org Cc: Peter B <pb@ludd.ltu.se> Subject: Re: usb2 iscochronous transfer Message-ID: <200602241628.45519.hselasky@c2i.net> In-Reply-To: <200602231641.k1NGfcFU011130@brother.ludd.ltu.se> References: <200602231641.k1NGfcFU011130@brother.ludd.ltu.se>
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On Thursday 23 February 2006 17:41, Peter B wrote: > Is there any work at all on usb2 isochronous transfer functionality? It's already implemented! > > http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/usb/ehci.c?rev=1.14.2.10&; >content-type=text/x-cvsweb-markup > > * 1) The EHCI driver lacks support for isochronous transfers, so > * devices using them don't work. > > Any hints on what's needed to make it work? My new USB driver supports it. http://www.turbocat.net/~hselasky/usb4bsd > > Seems DVB-S receiver cards use usb2-isoc mode, therefore the need. > Maybe you want to try out the new USB API when designing the driver. Don't forget that high-speed isoc have 8 frames per millisecond! PS: My USB driver in SVN is now also compiling and working on NetBSD 3.X. --HPS
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