Date: Mon, 6 Sep 1999 19:18:18 -0700 From: John-Mark Gurney <gurney_j@efn.org> To: Warner Losh <imp@village.org> Cc: Andrew Reilly <A.Reilly@lake.com.au>, hackers@FreeBSD.ORG Subject: Re: Limit of bus hierarchies (was Re: PCI modems do not work???) Message-ID: <19990906191818.50407@hydrogen.fircrest.net> In-Reply-To: <199909060541.XAA03034@harmony.village.org>; from Warner Losh on Sun, Sep 05, 1999 at 11:41:29PM -0600 References: <9909061532290G.69570@gurney.reilly.home> <199909060517.XAA02790@harmony.village.org> <199909060541.XAA03034@harmony.village.org>
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Warner Losh scribbled this message on Sep 5: > In message <9909061532290G.69570@gurney.reilly.home> Andrew Reilly writes: > : So there's going to be manufacturer-specific terminal/serial port drivers > : to talk to the serial ports on USB-attached laptop docking stations, like > : the Annex ethernet terminal server things? I guess in the Windows world > : they must provide 16550-virtualisation software, or else everyone's copy of > : Telix or TeraTerm won't work. Or the parallel ports vs parallel-port > : scanners. Or maybe these docking stations just won't work at all... > > No. The Windows world presents a standard SERIAL DRIVER interface, at > least that's the theory that is preached. I see no reason why a USB > serial port wouldn't do the same. USB defines a serial port > interface, IIRC, which is the same across manufacturers (in theory) > which would be handled by a single USB driver in our USB stack. so, Cyclades (cy) presents an interface similar to sio but ISN'T the sio drive... we just need to write a driver for the USB serial devices that present the same interface as the sio to get a compatible device driver... sio isn't designed to handle a smart device over usb.. it's designed to interface w/ the family of 8250 IC chips and nothing more... -- John-Mark Gurney Voice: +1 541 684 8449 Cu Networking P.O. Box 5693, 97405 "The soul contains in itself the event that shall presently befall it. The event is only the actualizing of its thought." -- Ralph Waldo Emerson To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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