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45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
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/*
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* Chromium OS Matrix Keyboard Message Protocol definitions
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*
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* Copyright (c) 2012 The Chromium OS Authors.
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _CROS_MESSAGE_H
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#define _CROS_MESSAGE_H
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/*
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* Command interface between EC and AP, for LPC, I2C and SPI interfaces.
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*
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* This is copied from the Chromium OS Open Source Embedded Controller code.
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*/
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enum {
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/* The header byte, which follows the preamble */
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MSG_HEADER = 0xec,
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MSG_HEADER_BYTES = 3,
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MSG_TRAILER_BYTES = 2,
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MSG_PROTO_BYTES = MSG_HEADER_BYTES + MSG_TRAILER_BYTES,
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/* Max length of messages */
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MSG_BYTES = EC_HOST_PARAM_SIZE + MSG_PROTO_BYTES,
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};
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#endif
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