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Re: [PATCH] Arrow keys on USB keyboards

To: Geert Uytterhoeven <>
Subject: Re: [PATCH] Arrow keys on USB keyboards
From: "Maciej W. Rozycki" <>
Date: Tue, 27 May 2003 15:50:59 +0200 (MET DST)
Cc: Ralf Baechle <>, Linux/MIPS Development <>
In-reply-to: <>
Organization: Technical University of Gdansk
Original-recipient: rfc822;
On Tue, 27 May 2003, Geert Uytterhoeven wrote:

> >  Hmm, as I've understood that's a 2.4-only problem as 2.5 has it solved
> > differently.  And I do think the translation really belong to the drivers
> > that use it -- why can't it be included with the USB keyboard driver or as
> > a library file?  Why an unrelated driver has to be cluttered? 
> It's not really used by a driver, but by the input subsystem itself. You could
> add the translation to drivers/char/keyboard.c, but then it will break if you
> use both the input subsystem (e.g. USB keyboard) and some other non-PS/2
> keyboard driver.

 I don't understand -- the scancode mapping is specific to a keyboard
type.  Both PC/AT and USB keyboards may use the same scancodes by chance,
but others have different ones.  So how can the input subsystem need a
PC/AT specific mapping?  Adding the table to drivers/char/keyboard.c
certainly makes no sense as the file is meant to be generic. 

 BTW, the PS/2 mapping is yet different and doesn't use prefixes. 

+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+        e-mail:, PGP key available        +

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