On Sat, Oct 14, 2006 at 12:05:37PM +0530, pradeep singh wrote:
> [snip]
> >> >> Without a driver i may not be able to communicate to the device like
> >> >> normal read write etc. But shouldnt it be visible to me through sysfs
> >> >> interface?
> >> >
> >> >Yes it should.
> >> Yes it is now visible. But problem is now it recognizes it as webcam
> >> :(. Though it is not. How big is this problem?
> >
> >What is it really? Why would the kernel be confused this way?
> Greg the device is a USB I/O card. I dont know why is kernel confused
> this way? But it loads the USB serial webcam driver for it , dont know
> why.
What does the kernel say when you plug in your USB device? You can see
this by running 'dmesg'.
> >
> >> or is it a problem at all? On the other hand can question specially to
> >> Greg :). You rewrote ezusb.c in the source tree for 2.6.x kernel. I
> >> want to use it but i somehow cant. Can i somehow use cypress_m8 module
> >> instead of ezusb module?
> >
> >Please provide specifics as to why you can not use the ezusb.c calls in
> >your driver. It works for me.
> I havent written the driver yet, so didnt try the ezusb calls:).
They why did you say you can not use it?
> >> I tried but cypress_m8 module doesnot identifies the card at all :(.
> >
> >I don't understand, why would different random drivers work with this
> >device. What type of device is it? What is the output of
> >/proc/bus/usb/devices with the device plugged in?
> there is no such thing devices in my /proc/bus/usb/ :(.
Did you select the CONFIG_USB_DEVICEFS option in your kernel
configuration? If so, just mount it:
mount -t usbfs none /proc/bus/usb
and then send the output of the file with the device plugged in.
I also suggest that you take a look at the Linux Device Drivers book for
the USB chapter (free online), and the built-in USB documentation in the
kernel ('make psdocs' creates it all.)
Also, there is a skeleton USB driver in drivers/usb/usb-skeleton.c that
will help you out.
If you still have questions after all of that, please ask them on the
linux-usb-devel mailing list. That's the proper place for this.
good luck,
greg k-h
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