keyboard mux driver (straw man proposal & code)
Maksim Yevmenkin
maksim.yevmenkin at savvis.net
Wed May 18 10:30:25 PDT 2005
and yet another reply to myself :)
i found few problems with the code and i'm going to fix them.
max
Maksim Yevmenkin wrote:
> replying to myself :)
>
> also bcc to folks who might be interested (mostly from vkbd(4) discussion).
>
> i have changed the proposed kbdmux code a bit. basically auxiliary
> device interface is gone. there can only be one kbdmux. it is no longer
> required to keep kbdmux control device open. so, right now its pretty
> much pure keyboard driver. i have also updated test program (works for
> me in console mode).
>
> http://www.geocities.com/m_evmenkin/kbdmux-1.tar.gz (~6K)
>
> the code also on freefall in my home directory
> (emax at freefall:kbdmux-1.tar.gz).
>
> thanks,
> max
>
> Maksim Yevmenkin wrote:
>
>> dear hackers,
>>
>> i'd like to follow up on keyboard mux driver discussion with some
>> code. please dont start jumping up and down just yet :) this is a
>> "straw man" code and everyone is welcome to beat the heck out of it.
>>
>> basically the code is based on vkbd(4) and the idea that was discussed
>> long time ago - create a "super" keyboard that consumes all other
>> keyboards in the system. the code creates a "super" kbdmux keyboard.
>> using new special ioctl's one can add multiple keyboards to the mux.
>> then one simple switches the current keyboard to the kbdmux keyboard.
>>
>> as you can see it is not usable from the kernel just yet, but i have
>> managed to create a mux with two vkbd's and it worked (please see
>> kbdmux_test.c program).
>>
>> the questions that i wanted to ask
>>
>> 1) is this good enough abstraction for the keyboard mux? can anyone
>> think of anything that would not work with this model?
>>
>> 2) should we decide to make this usable from the kernel, what is the
>> best way to do it?
>>
>> 3) did i miss anything? please tell me if i did! :)
>>
>> the code can be downloaded from
>>
>> http://www.geocities.com/m_evmenkin/kbdmux.tar.gz (~7K)
>>
>> i also put it in my home directory on freefall.
>>
>> thanks,
>> max
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>
>
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