Can you give me some pointers & documentation links for HOWTO using libusb/usbfs instead of a kernel driver.
Regards,
Mukund Jampala
> -----Original Message-----
> From: Greg KH [mailto:[email protected]]
> Sent: Thursday, January 19, 2006 11:03 AM
> To: Mukund JB.
> Cc: [email protected]
> Subject: Re: clarity on kref needed.
>
>
> On Thu, Jan 19, 2006 at 10:35:37AM +0530, Mukund JB. wrote:
> >
> >
> > > -----Original Message-----
> > > From: Greg KH [mailto:[email protected]]
> > > Sent: Thursday, January 19, 2006 10:33 AM
> > > To: Mukund JB.
> > > Cc: [email protected]
> > > Subject: Re: clarity on kref needed.
> > >
> > >
> > > On Thu, Jan 19, 2006 at 10:15:51AM +0530, Mukund JB. wrote:
> > > >
> > > > > > I have gone through kref and am planning to implement then
> > > > > in my usb driver.
> > > > >
> > > > > What kind of usb driver?
> > > > It is a finger print authentication USB driver. it
> doesn ot do the
> > > > authgentication but transports data to the application
> which really
> > > > does some processing.
> > >
> > > You shouldn't need a kernel driver for this, it can be done
> > > in userspace
> > > with libusb/usbfs, right?
> >
> > I mean I will register a char driver. I will just write a
> simple char
> > kernel module to read data from the USB device and zero
> copy it to the
> > userspace application. I guess that is the minimum work we
> need to do.
>
> You can do that from userspace with libusb/usbfs with no kernel driver
> needed. Why not do that instead?
>
> > Is there any other way using libusb/usbfs in which we can do this
> > without a need of USB kernel driver?
>
> Yes, use libusb/usbfs :)
>
> > > > No, I did not find any Documentation/kref.txt.
> > > > But I have read about kred in the link below:
> > > >
> > > http://developer.osdl.org/dev/robustmutexes/src/fusyn.hg/Docum
> > entation/kref.txt
> > > >
> > > >Is kref depricated because I find nothing related to it
> in linux/Documentation/?
> >
> > > What kernel version are you looking at? Look in the
> kernel source tree
> > > from kernel.org. What kernel tree are you building your
> driver against.
> >
> > I am planning it for 2.6.11.12.
>
> That's a pretty old kernel version, why not use the latest version?
>
> thanks,
>
> greg k-h
>
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