It looks like no one had the answers to these questions. Is there a better place to ask them? > Hello. > > I first sent this email to kernel-mentors, but I got no response. So I > am sending it again here. > > I wrote a driver for the Corsair K90 keyboard, it is my first kernel > development and I have a few questions about how to properly do a few > things (mainly interactions with the user space). > > The Corsair Vengeance K90 is a mechanical keyboard with a backlight, > macro keys (G1 to G18) and some other special keys (macro recording, > profile switching, changing the light level or disabling the "windows > logo" keys). The macro playback can be switched between hardware or > software (from the driver not a key). Using the generic HID driver, > the macro keys and special keys send wrong key code or no key code at > all (because of the HID usage code used by the keyboard). > > The source for my driver can be found at this address: > https://github.com/cvuchener/k90-linux-driver . It solves the problem > of the generic driver and add some handling of the other features (see > the README for more details). > > So, my questions are about: > > - Macro keys > For handling the macro keys from a software, they need to send some > keycodes but I have no idea what to use. Currently I use F keys above > 12 and some MISC buttons and a parameter for changing that (at load > time). Are there 18 keycodes reserved for custom uses? It would also > be possible to send no keycode at all and use a specific software > listening to the hidraw or hiddev devices, but I think it would be > better to be able to use a generic software. > > - Backlight > I chose to use a led class device to manage the backlight. It seems to > work fine but when unregistering the driver, the light is set to 0. > The keyboard remembers the previous light level and so nothing should > be done when registering or unregistering the driver. Is the led class > the right class for that? or am I using it wrong? > > - Sending the macro profiles to the keyboard > I created a "profile" branch on my git repo for adding binary > attributes used for sending macro data to the keyboard. But I am not > sure it is a good idea, it may be better to leave that to the user space. > > Any other comment is welcome. > > Thanks, > Clément _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
