On Fri, Sep 18, 2009 at 09:40:23AM -0600, Rick L. Vinyard, Jr. wrote: > Dmitry Torokhov wrote: > > On Thu, Sep 17, 2009 at 02:57:07PM -0300, Henrique de Moraes Holschuh > > wrote: > >> On Wed, 16 Sep 2009, Rick L. Vinyard, Jr. wrote: > >> > The M* keys are intended to provide a quick way to switch between key > >> > mappings, with each mode having their own user-defined mappings. > >> > >> What I'd do in this case would be this: > >> > >> 1. Initially have the M* level-shift keys assigned KEY_RESERVED > >> > >> 2. Have a big enough keymap to map all keys in all M*-level shift states > >> possible. > >> > >> Eg: > >> START OF KEYMAP > >> M* keys > >> 1st set of G* keys > >> 2nd set of G* keys > >> 3rd set of G* keys... > >> ... > >> last set of G* keys > >> END OF KEYMAP > >> > >> 3. Have the driver special-process M* level-shift keys *as long as they > >> are > >> still set to KEY_RESERVED* to select which part of the keymap is used to > >> translate the other keys. Note that this likely means pressing a M* key > >> would be transparent to userspace in this case, i.e. no events would be > >> issued when a M* key is doing a level shift. > >> > >> So, you'd be able to set all mappings you want in the driver, and the M* > >> keys would do what they're expected to do without any userland help at > >> all, > >> but you'd still be able to program the M* keys to be normal keys if you > >> want. > >> > >> Of course, this assumes you don't do chording on multiple M* keys to end > >> up > >> with a huge number of keymaps :p > >> > > > > Actually I think that the device should just emit KEY_PROG1..KEY_PROG4 > > for the M keys and have userspace daemon load alternate keymaps on the > > fly in resaponse to KEY_PROGx. The device is just a set of completely > > generic buttons... User will have to tell the kernel what to map them > > to. > > > > Emitting a keycode certainly does simplify things, but that will preclude > the user from programming the G-keys to KEY_PROG1..KEY_PROG4. > > Are there any specific use cases where a user would want to program a > G-key to KEY_PROG1..KEY_PROG4? > I an not sure, but if they want to use KEY_PROG* somewhere else they can reprogram the M* keys to somethis other as well. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
