Date: Tue, 01 Oct 2002 23:14:14 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: bms@spc.org Cc: brooks@one-eyed-alien.net, stest030@garbonzo.hos.ufl.edu, freebsd-mobile@FreeBSD.ORG Subject: Re: Microsoft MN-510 USB Wi-Fi ? Message-ID: <20021001.231414.10295767.imp@bsdimp.com> In-Reply-To: <20021001103807.GU26352@spc.org> References: <200209302259.00470.stest030@garbonzo.hos.ufl.edu> <20020930214208.A30941@Odin.AC.HMC.Edu> <20021001103807.GU26352@spc.org>
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In message: <20021001103807.GU26352@spc.org>
Bruce M Simpson <bms@spc.org> writes:
: On Mon, Sep 30, 2002 at 09:42:08PM -0700, Brooks Davis wrote:
: > On Mon, Sep 30, 2002 at 10:59:00PM -0400, Bob Johnson wrote:
: > It definatly won't work with 4.6.2. There's no support for USB wireless
: > adaptors at this point. I think there are linux drivers for at least
: > one type, but I don't know if anyone is working on a port of them.
:
: If anyone's planning on reverse engineering these things, typically the
: drivers themselves are NDIS5 ones, not USB ones. The NDIS5 driver then
: acts as a client calling into USBD.
:
: A number of people have taken apart these USB wireless adapters and found
: them to contain PCMCIA devices with a bridge chip of some kind.
:
: If that's the case, and the bridge chip forwards commands in much the same
: way as the USB-ATA bridges in existence, then writing an additional layer
: for if_wi to talk via the bridge might be straightforward once the packet
: format is known.
Well, the usb based prism2 cards are definitely documented, and
definitely look a whole lot like the pcmcia version (minor
differences). However, doing a usb attachment to the wi driver might
be difficult. Bill Paul said we might be better off copying it to uwi
and hacking from there. However, I'm not sure that I agree with him.
That might be faster, but it would be more of a pain to maintain.
Also, I'd suspect that the PCMCIA bridge kludge version would be a
little different than the native usb version. It also wouldn't help
if you had a non-wifi card installed.
I'd also contemplated getting one of the adapters and writing a
generic usb<->pcmcia bridge driver, but soon realized I had too many
projects in the hopper and this one would likely drive me insane in
short order :-).
Warner
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