49
edits
Changes
Logitech USB steering wheel (view source)
Revision as of 00:08, 10 September 2010
, 00:08, 10 September 2010→HID Joystick
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+
===HID Joystick===
===HID Joystick===
−The HID description declares the number of axis and buttons, unfortunately it is corrupt.
+The dongle has the USB ID 0x046D:0xC29C, the HID descriptor is (unfortunately) corrupt. Under Windows XP the device is seen as a HID device with a combined X/Y axis, Z axis and 11 buttons. Under Linux the device is seen as HID device with X, Y and Z axis, but no buttons.
−The solution (on Linux) is to re-write the descriptor on the fly, after that the 'joystick' is will function correctly.
+<code>
+ 05 01 09 04 A1 01 A1 02 95 01 75 0A 15 00 26 FF
+ 03 35 00 46 FF 03 09 30 81 02 06 00 FF 95 02 75
+ 01 25 01 45 01 09 01 81 02 95 0B 19 01 29 0B 05
+ 09 81 02 06 00 FF 95 01 75 01 09 02 81 02 05 01
+ 75 08 26 FF 00 46 FF 00 09 31 09 32 95 02 81 02
+ C0 A1 02 06 00 FF 95 07 09 03 91 02 C0 0A FF FF
+ 95 08 B1 02 C0
+</code>
+The solution (on Linux) is to re-write the descriptor on the fly, after that the axis/buttons are recognized correctly (even though the wireless link is not active yet).
+<code>
+ if ((quirks & LG_WIIWHEEL) && rsize >= 101 &&
+ rdesc[41] == 0x95 && rdesc[42] == 0x0B &&
+ rdesc[47] == 0x05 && rdesc[48] == 0x09) {
+ dev_info(&hdev->dev, "fixing up Logitech WiiWheel button "
+ "descriptor\n");
+ rdesc[41] = 0x05;
+ rdesc[42] = 0x09;
+ rdesc[47] = 0x95;
+ rdesc[48] = 0x0B;
+ }
+</code
===Force Feedback===
===Force Feedback===