2 * Chromium OS Matrix Keyboard Message Protocol definitions
4 * Copyright (c) 2012 The Chromium OS Authors.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 #ifndef _CROS_MESSAGE_H
25 #define _CROS_MESSAGE_H
28 * Command interface between EC and AP, for LPC, I2C and SPI interfaces.
30 * This is copied from the Chromium OS Open Source Embedded Controller code.
33 /* The header byte, which follows the preamble */
37 MSG_TRAILER_BYTES = 2,
38 MSG_PROTO_BYTES = MSG_HEADER_BYTES + MSG_TRAILER_BYTES,
40 /* Max length of messages */
41 MSG_BYTES = EC_HOST_PARAM_SIZE + MSG_PROTO_BYTES,