linux-kernel - Re: [RFC] Input - synaptics: re-route tracksticks buttons on the Lenovo 2015 series

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Message-ID: <20150206014924.GB21288@dtor-ws>
Date:	Thu, 5 Feb 2015 17:49:24 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Andrew Duggan <aduggan@...aptics.com>
Cc:	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	Hans de Goede <hdegoede@...hat.com>,
	Peter Hutterer <peter.hutterer@...-t.net>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC] Input - synaptics: re-route tracksticks buttons on the
 Lenovo 2015 series

On Thu, Feb 05, 2015 at 05:33:07PM -0800, Andrew Duggan wrote:
> On 02/05/2015 12:38 PM, Benjamin Tissoires wrote:
> >Lenovos 2015 series has the physical tracktick buttons wired
> >through the touchpad. The kernel should re-route them through
> >the pass-through interface.
> >
> >Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
> >---
> >
> >Hi Dmitry,
> >
> >Well, in one of your replies regarding the Synaptics Lenovo 2015
> >series, you mentioned that you wouldn't mind having the trackstick
> >buttons re-routed through the trackstick (pass-through interface).
> >
> >I came out with this patch (checkpatch complains a lot about it but
> >today's setup is not that convenient), and I'd like to hear what you
> >think of it.
> >
> >If you agree to go this path, I'll remove the warnings from checkpatch
> >and do a proper submission.
> >
> >The patch is still not future proof (if Synaptics updates the board like
> >they did for the *40 series, we will need to fix this all over again),
> >so I might have a little bit more of work to do. Anyway, it works.
> 
> I discovered that there is a firmware query to determine if the
> touchpad has stick buttons which are wired to the touchpad and are
> reported as extended buttons. Query $01 bit 17 indicates that Query
> $10 exists. Then Query $10 bit 0 indicates indicates the extended
> buttons should be mapped to the guest stick buttons.
> 
> Additional information and some diagrams are in the pdf here:
> https://www.dropbox.com/s/vv1j4zsytgrw7mm/synaptics-tp-stick-buttons.pdf?dl=0

Awesome, thanks Andrew.

-- 
Dmitry
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