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29 lines
651 B
C
29 lines
651 B
C
/* SPDX-License-Identifier: GPL-2.0+ */
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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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*/
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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_PROTO2_MAX_PARAM_SIZE + MSG_PROTO_BYTES,
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};
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#endif
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