On Tue, Sep 15, 2009 at 01:05:57PM -0600, Rick L. Vinyard, Jr. wrote: > Dmitry Torokhov wrote: > > On Tue, Sep 15, 2009 at 10:41:30PM +0530, Trilok Soni wrote: > >> Adding linux-input. > >> > >> On Tue, Sep 15, 2009 at 9:49 PM, Rick L. Vinyard, Jr. > >> <rvinyard@xxxxxxxxxxx> wrote: > >> > On the Logitech G13 there are a set of 10 special keys at the top of > >> the > >> > device. > >> > > >> > I've written the driver so that it maintains a map from the general > >> keys > >> > (G1-G22) to Linux' input subsystem keys. > >> > > >> > The map can be changed on the fly, allowing multiple keymaps to be > >> loaded. > >> > > >> > As a side note I haven't provided for this functionality (multiple > >> > keymaps) in the driver since this can be maintained from userspace, > >> but it > >> > does need to know about the currently loaded keymap so that when the > >> raw > >> > HID events are parsed the appropriate EV_KEY events can be input. > >> > > >> > I could set it up so that the special keys also map to a KEY_* code. > >> > However, I'd prefer to set things up so that any G1-G22 key can be > >> mapped > >> > to any input subsystem KEY_* code and not reserve a set of 10 from the > >> > current KEY_* codes for the 10 special keys. > >> > > >> > One way I was thinking of approaching this was to generate EV_MSC type > >> > events (with a MSC_RAW code) using the value to indicate the state > >> > (pressed/released) and special key. > > > > Doesn't HID already generate EV_MSC/MSC_SCAN for exactly this purpose > > so userspace knows what keys can be remapped? You may initially map all > > keys you don't know the usage to KEY_UNKNOWN. > > As I understand it the EV_MSC/MSC_SCAN is used to trigger a prompting of > the user to map a key, which would be useful for the G1-G22 keys and > perhaps 5 of the 10 special keys. But, that's not the behavior I want for > the M1, M2, M3, MR and backlight keys. > > Somehow they need to be distinct from any existing KEY_* codes or not have > a code at all... i.e. only emitting the raw misc events. > > Perhaps the BTN_MISC codes are better suited for these keys? > I am sorry, I don't follow... why would yo not want to assign a standard code to the M* keys? -- 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
