console: Add support for using EC-3PO console.

This commit introduces a new CONFIG_* option.  To utilise the
experimental console, simply define the following config option in the
board's board.h file.

     #define CONFIG_EXPERIMENTAL_CONSOLE

This is a temporary option which allows the EC console to be work with
the EC-3PO interactive console interface.  When this option is enabled,
the EC expects commands to packed in a particular format.  This is for
command integrity and allows the interpreter to perform automatic
command retrying in the event that a character is dropped from the sent
command.

It also removes a lot of the console editing methods since they are now
being served by EC-3PO.

Once the EC-3PO interpreter is pulled into servod, we can enable this
feature by default and the config option can go away.

BUG=chrome-os-partner:46054
BRANCH=None
TEST=make -j buildall tests
TEST=Enable CONFIG_EXPERIMENTAL_CONSOLE on GLaDOS; Flash EC and verify
that console works via the EC-3PO interactive console interface.
TEST=Build and flash on GLaDOS and verify normal console operation on
standard EC UART.

CQ-DEPEND=CL:308615

Change-Id: I5e66eb94e31299b27ce029b7f7ce6ba0a7fb6816
Signed-off-by: Aseda Aboagye <aaboagye@google.com>
Reviewed-on: https://chromium-review.googlesource.com/309991
Commit-Ready: Aseda Aboagye <aaboagye@chromium.org>
Tested-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>

0 files changed, 0 insertions, 0 deletions