Hi Greg,
Have just read your book of chapter 13 last week, I am still new to USB :-).
> As the usb core isn't even registering your device I'd suggest fixing
this first before worrying about your code :)
I did see a message of "usb.c: registered new driver MX" when the module
was inserted. Didn't above message indicate that the device had been
registered? If not, could you please explain me more what was I missing
and how can I fix the device registering?
> Do any USB devices work on this system? Does this device work on any
> other machine?
No, the system is an embedded ARM linux platform, it is the first time I
tried to make the USB work on it although there are many other drivers
have already worked on it. The device of the usb-serial adapter works on
PCs.
Thanks.
Jim
Greg KH wrote:
> On Fri, Sep 15, 2006 at 09:20:25PM +1000, [EMAIL PROTECTED] wrote:
>
>>Thanks Greg. Please see attached file which is identical to your
>>skeleton.c except changed the name to mx (for my experimental and learning).
>>
>>What I did was following commands:
>>
>>/sbin/insmod mx.o
>>mknod /dev/mx0 c 180 0
>>chmod 644 /dev/mx0
>>
>>usb.c: registered new driver MX
>>
>>I can see mx module by lsmod and I can see /dev/mx0 as well.
>>
>>Then to call fd = open("dev/mx0", O_RDWR), it return an error of "No
>>such device".
>>
>>When I pluged a serial adapter UC-232A:
>>
>>hub.c: new USB device not_pci-3, assigned address 2
>>usb.c: USB device not accepting new address=2 (error=-110)
>>hub.c: new USB device not_pci-3, assigned address 3
>>usb.c: USB device not accepting new address=3 (error=-110)
>
>
> As the usb core isn't even registering your device, your driver will
> never get called. I'd suggest fixing this first before worrying about
> your code :)
>
> Do any USB devices work on this system? Does this device work on any
> other machine?
>
> thanks,
>
> greg k-h
>
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