Hi The Nintendo Wii Remote (short Wiimote) is the remote for the Nintedo Wii console and communicates via bluetooth. There have been many approaches to write linux drivers (incomplete list: http://wiibrew.org/wiki/Wiimote/Library), however, they all are written as separate libraries and not as device drivers. This has the disadvantage, that the application must actively connect to the wiimote (probably performing a bt-inquiry beforehand) instead of listening for incoming connections. The latter one can be achieved by listening on the HID l2cap channels (psm 0x11 and 0x13), though, the wiimote does not follow the HID standard. Since the bluez input-plugin listens on these ports, the driver needs to be integrated into the bluez-daemon or kernel to work properly. I intend to adjust the sources to fit into the linux device driver model, however, my question is whether to integrate the driver into the bluez-daemon (probably via fakehid.c in the input-plugin) or whether to write a kernel device driver? It would also be nice to get some feedback whether my integration would work and whether there is a chance that this patch gets merged upstream. My current device driver runs as daemon in background and provides access to connected wiimotes via uinput (evdev). It works only if the "input-plugin" is disabled, though. Sources are available at: https://github.com/dvdhrm/xwiimote The main driver function "start_driver" takes two file descriptors (both l2cap channels) as arguments and runs the driver as new process. This allows easy integration into the fakehid.c bluez infrastructure. My suggestion would be integrating this driver into the input-plugin via fakehid.c and providing input events via uinput. In the next days I will put together a patch fore the most basic wiimote functionality so keypresses will be available via /dev/input/eventX, unless you say this is a bad idea and it should be integrated via some different interface. More complex components like the accelerometer, IR-sensor and extensions may be added later. http://wiibrew.org/wiki/Wiimote Shows reverse-engineered protocol details http://wiibrew.org/wiki/Wiimote/Library Lists common protocol implementations http://en.wikipedia.org/wiki/Wiimote Description of the device Writing the driver as separate plugin is currently not possible, because this plugin would depend on another plugin (input-plugin) and there is currently no way to get symbols from other plugins. If the fakehid.c interface is changed to provide access for other plugins to add fake-device-descriptions to "struct fake_hid fake_hid_table", the driver could be implemented as separate plugin. David -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
