Writing a USB driver for a non working device

Writing a USB driver for a non working device

[madav maddy]

Hi,

I am newbie. For the better understanding of the USB, i have decided write a
USB driver for the device for which it works in windows but not in linux. So
i have picked the Logitech USB headset.

The background i have is ,i have studied the ldd usb drivers and written few
dummy USB driver.

Before i start implementing, i made some basic study
- on connecting the device to my Ubuntu desktop, lsusb shows
*     Bus 002 Device 065: ID 046d:0a01 Logitech, Inc. USB Headset*

on issuing dmesg.
   [550289.589037] usb 2-1.6: new full speed USB device using ehci_hcd and
address 66


- so i believe there should be some driver already existing, is my
understanding right?
- if not, where can i start for implementing a new driver of my own?
      I think i need  start doing some reverse engineering on windows using
some usb logging tool, for the understanding of working of the device


Thanks,
Madav Raman
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Writing a USB driver for a non working device

[Peter Teoh]

On Tue, Oct 11, 2011 at 11:42 PM, madav maddy <maddy.mdv007@gmail.com> wrote:
> Hi,
> I am newbie. For the better understanding of the USB, i have decided write a
> USB driver for the device for which it works in windows but not in linux.?So
> i have picked the Logitech USB headset.
> The background i have is ,i have studied the ldd usb drivers and written few
> dummy USB driver.
> Before i start implementing, i made some basic study
> - on connecting the device to my Ubuntu desktop, lsusb shows
> ? ? ?Bus 002 Device 065: ID 046d:0a01 Logitech, Inc. USB Headset
> on issuing dmesg.
> ? ?[550289.589037] usb 2-1.6: new full speed USB device using ehci_hcd and
> address 66

That is the vendor/product ID:   046d:0a01

And then normally u will use userspace USB API to open/read the device:

http://www.libusb.org/

libusb.sourceforge.net/doc/
>
> - so i believe there should be some driver already existing, is my
> understanding right?
> - if not, where can i start for implementing a new driver of my own?
> ? ? ? I think i need ?start doing some reverse engineering on windows using
> some usb logging tool, for the understanding of working of the device
>
> Thanks,
> Madav Raman
>
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> Kernelnewbies at kernelnewbies.org
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>
>



-- 
Regards,
Peter Teoh