Re: [PATCH 59/70] USB Input: Added kernel module to support all GTCO CalComp USB InterWrite School products

On 2/12/07, Jeremy Roberson <[email protected]> wrote:
> Here is the status so far.  The digitizer is recognized by the USB
> Subsystem but, there are no input handlers registered for it i.e. mouse
> or event.   I'm not sure how to get an input event handler registered on
> the device.  Below is the output of lsusb.
>

You mean that current HID driver does not attach to the device, right?
I am CCing Jiri Kosina, HID maintainer

> Bus 001 Device 008: ID 078c:0401
> Device Descriptor:
>  bLength                18
>  bDescriptorType         1
>  bcdUSB               1.10
>  bDeviceClass            0 (Defined at Interface level)
>  bDeviceSubClass         0
>  bDeviceProtocol         0
>  bMaxPacketSize0         8
>  idVendor           0x078c
>  idProduct          0x0401
>  bcdDevice            1.00
>  iManufacturer           1 GTCO/CalComp
>  iProduct                2 Digitizer
>  iSerial                 0
>  bNumConfigurations      1
>  Configuration Descriptor:
>    bLength                 9
>    bDescriptorType         2
>    wTotalLength           34
>    bNumInterfaces          1
>    bConfigurationValue     1
>    iConfiguration          0
>    bmAttributes         0x40
>      (Missing must-be-set bit!)
>      Self Powered
>    MaxPower                2mA
>    Interface Descriptor:
>      bLength                 9
>      bDescriptorType         4
>      bInterfaceNumber        0
>      bAlternateSetting       0
>      bNumEndpoints           1
>      bInterfaceClass         3 Human Interface Devices
>      bInterfaceSubClass      0 No Subclass
>      bInterfaceProtocol      0 None
>      iInterface              3 TABLET BQ1.4
>        HID Device Descriptor:
>          bLength                 9
>          bDescriptorType        33
>          bcdHID               1.00
>          bCountryCode            0 Not supported
>          bNumDescriptors         1
>          bDescriptorType        34 Report
>          wDescriptorLength     147
>         Report Descriptors:
>           ** UNAVAILABLE **
>      Endpoint Descriptor:
>        bLength                 7
>        bDescriptorType         5
>        bEndpointAddress     0x81  EP 1 IN
>        bmAttributes            3
>          Transfer Type            Interrupt
>          Synch Type               None
>          Usage Type               Data
>        wMaxPacketSize     0x0008  1x 8 bytes
>        bInterval               5
> Device Status:     0x0001
>  Self Powered
>
>
> Regarding the IPanel.  Both a mouse and input event handler are
> registered to it when it is plugged in.  Instead of blacklisting it and
> using a separate driver, is there a way to unregister the mouse handler
> and just leave the general event handler?
>
> Please let me know if I should be working with someone else on these
> issues, I don't want to bug anyone.
>
> Thanks,
>
> On Fri, 2007-02-09 at 08:46 -0800, Greg KH wrote:
> > On Thu, Feb 08, 2007 at 09:37:47PM -0700, Roberson, Jeremy wrote:
> > > The HID driver doesn't parse Digitizer data properly which, is why
> > > Wacom, etc requires custom drivers for their digitizers.  Same for our
> > > digitizers.  As far as I know, Digitizers have never been parsed
> > > properly by the HID Driver.  I can get more details on what is not
> > > parsed properly by the HID Driver but, it will take some time.
> >
> > It would be good to learn more about this, so possibly we can fix the
> > HID layer so that it works for everyone and these drivers can go away.
> >
> > thanks,
> >
> > greg k-h
> --
> Jeremy Roberson
> Software Engineer
> GTCO CalComp
>
> "Do not go gentle into that good night,
> Old age should burn and rave at the
> close of the day; Rage, rage against the
> dying of the light."
> - Dylan Thomas
>
>
>
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-- 
Dmitry

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