Re: [RFC][PATCH v2 0/5] omap1: Amstrad Delta: add support for external keyboard

From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Cc: e3-hacking@earth.li, linux-input@vger.kernel.org
Subject: Re: [RFC][PATCH v2 0/5] omap1: Amstrad Delta: add support for external keyboard
Date: Sun, 11 Apr 2010 20:16:36 -0700	[thread overview]
Message-ID: <20100412031636.GC29292@core.coreip.homeip.net> (raw)
In-Reply-To: <201003292158.05120.jkrzyszt@tis.icnet.pl>

On Mon, Mar 29, 2010 at 09:58:02PM +0200, Janusz Krzysztofik wrote:
> Monday 29 March 2010 16:19:23 Janusz Krzysztofik napisał(a):
> > This series of patches adds support for an external keyboard (called
> > mailboard) connected to the Amstrad Delta (E3) videophone.
> >
> > The series is based on a patch by Matt Callow, created against
> > linux-omap-2.6.19[1], initially submitted to the e3-hacking mailing list in
> > April 2006[2].
> >
> > Since the keyboard serial clock line is connected to a GPIO line, it
> > generates interrupts every single bit received. In order to handle this
> > correctly, the code makes use of a FIQ hardware feature. Since all GPIO
> > generated interrupts would be converted to FIQ, the handler must include
> > support for all supported GPIO connected devices: the keyboard, a modem and
> > a hook switch.
> >
> > My modifications to the original patch include:
> > - split into several patches,
> > - refresh against a recent linux version,
> > - a lot of cleanups, mainly to get rid of checkpatch reported issues,
> > - add support for handling interrupts generated by a GPIO line that the
> >   meanwhile activated hook switch hangs off.
> > v2 changes:
> > - remove scan code to key code mapping from the serio driver, that doesn't
> >   belong here and should be set up from userspace;
> 
> 
> Hi,
> 
> For those of you who would like to do some testing:
> 
> You'll need a utility for installing a key table. Given no single hint from 
> linux-input team,

Sorry about that.

> I ended up using input-kbd, that is part of input-utils 
> package, at least on Gentoo and Debian. Other possibilities I know of:
> - V4L guys provided linux/Documentation/DocBook/v4l/keytable.c.xml example,
> - http://0pointer.de/lennart/projects/keyfuzz/
> 

HAL used to be responsible for loading custom keymaps on modern distros
but I believe now that task is moved into udev (see extras/keymap).

-- 
Dmitry
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