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 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
