Date: Tue, 6 Sep 2011 09:09:18 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-hackers@freebsd.org Cc: Daniel Grech <dgre090@gmail.com> Subject: Re: Detach USB Device Driver and Attach it to ugen driver at runtime Message-ID: <201109060909.18300.hselasky@c2i.net> In-Reply-To: <C44D95B8-2351-4BCD-BC44-071304EFD4FD@gsoft.com.au> References: <CAG167sZd4WBSx--ukEb2RXKq0V0-DZJcMYt176bR1Y-snjkFaQ@mail.gmail.com> <C44D95B8-2351-4BCD-BC44-071304EFD4FD@gsoft.com.au>
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On Tuesday 06 September 2011 03:53:55 Daniel O'Connor wrote:
> On 05/09/2011, at 23:10, Daniel Grech wrote:
> > Hi, I'm using libusb to gain access to raw USB Data from userspace. My
> > problem is that this library only works with devices which are treated as
> > generic devices ("handled by the ugen driver"). I need a mechanism that
> > will allow me to detach any device specific drivers that are attached to
> > a device and attach the ugen driver instead. I want to do this without
> > re-compiling the FreeBSD Kernel. Thanks in advance for your help.
>
> You can access the device via ugen even if a kernel driver has attached to
> it.
>
> I suspect you wouldn't be able to if the kernel driver that did attach is
> in use, but I am not sure.
You can attach even if a kernel driver is attached, though it is best to only
have one driver attached at the same time.
--HPS
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