From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Torokhov Subject: Re: [PATCH 0/1] input: keyboard: add qci keyboard driver Date: Tue, 31 Aug 2010 23:34:30 -0700 Message-ID: <20100901063430.GG23585@core.coreip.homeip.net> References: <4C7838DD.1020004@codeaurora.org> <201008271533.01542.dmitry.torokhov@gmail.com> <4C7BF6D2.5080501@codeaurora.org> <20100830215556.GC28865@core.coreip.homeip.net> <4C7D6C17.1070604@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-px0-f174.google.com ([209.85.212.174]:51069 "EHLO mail-px0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751269Ab0IAGeh (ORCPT ); Wed, 1 Sep 2010 02:34:37 -0400 Content-Disposition: inline In-Reply-To: <4C7D6C17.1070604@codeaurora.org> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Neil Leeder Cc: "linux-input@vger.kernel.org" , "linux-arm-msm@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Horace Fu , Hsin.Wu@quantatw.com, mcuos.com@gmail.com On Tue, Aug 31, 2010 at 04:54:47PM -0400, Neil Leeder wrote: > On 8/30/2010 5:55 PM, Dmitry Torokhov wrote: > >And still you are using only one GPIO in your driver? While WPCE775x > >does seem to have matrix keypad support I think that you are using one > >of the 3 PS/2 ports, like your touchpad does. > > Hi Dmitry, > > I can assure you that the keyboard is on the 8*18 GPIO matrix on the > Nuvoton EC (only 8*16 being used in the current design). There > certainly are 3 PS/2 ports on the EC, but in the board designs I > have only one of those is used as a PS/2 port, and that is for the > touchpad. The other two ports are muxed with GPIOs and the pins are > being used as GPIOs for other functions, not PS/2 ports. > > The firmware on the EC converts keypresses on the GPIO matrix to > scancodes and sends them over I2C. The single GPIO used by the > keyboard driver is an interrupt. > > >The device is initialized with 0xf4; the device is supposed to respond > >with 0xfa; I wonder what scancodes the device reports... It smells > >strongly of PS/2. > > > >Also, it is not controller that supports PS/2 commands but rather the > >device itself so I am still hopeful that we could make use of the > >standard drivers. > > We can speculate on the reasons that the firmware on the EC uses > 0xF4 & 0xFA for init and ack - my guess would be for a minimal > amount of commonality with the PS/2 protocol - but it doesn't > emulate the rest of the PS/2 protocol for the GPIO matrix device. I > tried with atkbd. It issues reset, getid, setleds - all of which > fail with no response from the EC. It only responds to F4. OK, I give up on pursuit of serio solution. Again ;) > > The scancodes reported are whatever the firmware provides. A > previous version of firmware had some non-standard values and the > driver had to use a look-up table to convert them to something > useful. With the change to the current keyboard layout Quanta > changed the scancodes reported to match the KEY_* values in input.h, > which is why there is no table in the current driver. I believe we still should support changing keymap via EVIOCSKEYCODE so we need to have the keymap even though the initial seed is 1:1 with scancodes. -- Dmitry