Additional EC commands

[Richard A. Smith]

I'm trying to define out the EC commands/features that we will need once 
we turn off the direct EC RAM access.

WRT to turning off the EC ram access I was considering making this a EC 
command or having OFW do this directly as one of the bios protection 
steps.  That way we enable or disable it with OFW versions rather than 
have to update EC code which we want to minimize.

Its been discussed that we do not want to have to poll for any of this 
information.  So for things like temperature(s) we may want alarm set 
points.

Here's what I have so far, any additions?

Additional Commands:

- % Battery capacity remaining.
- Status (Battery present, not present, AC present, AC Not present, Type 
(LiFe, NiMH)
- Bat Temp
- Ambient Temp
- Voltage
- Current
- Game button status (For dropping to OFW interactive mode.)

New Features:
- SCI interrupt on power status change. (AC plug/unplug)
- SCI when battery capacity changes some x%.  How much % do we want that 
to be?
- SCI at alarm points?

-- 
Richard Smith  <richard at laptop.org>
One Laptop Per Child