On Fri, 7 Oct 2011, Terry Lambert wrote: > You make a very good point on the key remapping. > > ... > > Are we sure that there isn't a field in the keyboard information in > the USB that reports the keyboard does this? > > The only other alternative seems to be to quirk the keyboard as > reporting keys down when they are down, up when they are up, and > generating pseudo events for "keycode not present in report". > > I guess I'm willing to write a "hosed keyboard driver" driver if > necessary. This apparently effects about 5-10% of keyboards, > predominantly laptops with internal USB (some dell inspiron, some > samsung), and the folding keyboards people like to use with android > tablets. > > I'm willing to take any advice about where I can get a handle on all > the keys in a given report to implement a general quirk on this > hardware. > > If necessary, we can always write a driver, I suppose, if you can > point me at an example? So if I understood the situation correctly (Dmitry, thanks for adding me to CC), what you want to do is to write a very simple driver that has a hook called every time HID event occurs on the keyboard, and have it do modifier magic before it's reported to the input subsystem. There are various existing drivers which are doing exactly this that can serve as an example. The simplest one probably is hid-microsoft, the more sophisticated one is hid-apple. These two are registering ->event callback, so they are obtaining already pre-parsed information. If you'd need to receive information that hasn't been parsed yet by the HID parser, you'd rather register ->raw_event callback. There are various drivers that to this as well -- hid-zydacron being a really simple one and hid-magicmouse being a sophisticated one. I believe those drivers should serve as a perfect example for what you need. -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
