[parisc-linux] keyboards and such.

[parisc-linux] keyboards and such.

[Alex deVries]

So, I've spent some time looking at the keyboard device driver in the
Linux kernel, and it really wants there to be an 8042 PS/2 controller,
which just doesn't exist on the Lasi.

This means that I can speak directly to the keyboard, which shouldn't be
too difficult to whip up a driver if I had the docs on how to speak to the
keyboard.

Does anyone have docs on how to speak to a standard AT or PS/2 keyboard?
The Black Puffin of Death will haunt you if you point me to 8042
controller docs.

- Alex

-- 
Alex deVries <adevries@thepuffingroup.com>
Vice President Engineering
The Puffin Group

Re: [parisc-linux] keyboards and such.

[Philipp Rumpf]

> Does anyone have docs on how to speak to a standard AT or PS/2 keyboard?
> The Black Puffin of Death will haunt you if you point me to 8042
> controller docs.

what about looking at the current keyboard driver ?  It looks to me like it
shouldn't be too difficult to work from the assumption that kbd_read_input is
RCVDATA, kbd_read_status is STATUS, KBD_STAT_OBF is RBNE, KBD_STAT_IBF is TBNE,
KBD_STAT_MOUSE_OBF we don't need, KBD_STAT_GTO is TERR and KBD_STAT_PERR is
PERR.

looking at it again, the bit correlations are:

8042		Lasi
0-1		0-1
6-7		2-3
2-5		unimplemented
unimplemented	4-7

assuming there is a 8042-compatible chip inside lasi, it just seems to get the
line for bit 2 as both input line 2 and 3 (and there's some additional logic
around it).

	Philipp Rumpf