Linux Kernel: Microsoft Digital Media Keyboard 3000

Hi,

I've a problem with my Microsoft Digital Media Keyboard 3000.

One part of the keyboard is seen as a joystick by the hid layer of the kernel (creating a js0 node with udev…)

The lsusb output is in the attachements.

as you can see inside it, the keyboard declares two interfaces:
bNumInterfaces 2

One with :

      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      1 Boot Interface Subclass
      bInterfaceProtocol      1 Keyboard

which seems ok

and one with:

      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None

The device is cut in two by event system :
pci-0000:00:1d.7-usb-0:1.2:1.0-event-kbd
pci-0000:00:1d.7-usb-0:1.2:1.1-event-kbd

but this last one is also provided to :
pci-0000:00:1d.7-usb-0:1.2:1.1-kbd -> ../js0

The signals sent on it are nothing like a joystick (some garbage sometimes, but nothing that seems coherent).

Special keys seems to be sent only to the second input event device. But I managed to get them working by remapping them :
/usr/lib/udev/keymap input/event11 0xc022d back 0xc022e forward 0xc01b6 camera 0xc01a2 f19

the only one which is not working is the "Aero" key, giving a scancode of 0x1A2, I can see it in the /sys/kernel/debug/hid/…/event but it doesn't seems to be declared as a valid scancode judging by what I see in include/linux/input.h of a 3.4 kernel.

Do you think it can be possible to avoid the kernel seeing this as a joystick (joydev module) and to add this 0x1A2 scan code ?

If you need any further information, I may provide them to you.

Thanks for your work on the kernel.

Bus 002 Device 009: ID 045e:0730 Microsoft Corp. Digital Media Keyboard 3000 Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00

  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x045e Microsoft Corp.
  idProduct          0x0730 Digital Media Keyboard 3000
  bcdDevice            2.00
  iManufacturer           1 Microsoft
  iProduct                2 Microsoft� Digital Media Keyboard 3000
  iSerial                 0 
  bNumConfigurations      1

Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 59
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 1 Boot Interface Subclass
bInterfaceProtocol 1 Keyboard
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.11
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 60
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 10
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.11
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 106
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
Device Status: 0x0000
(Bus Powered)