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include/cros_ec_message.h
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/* * Chromium OS Matrix Keyboard Message Protocol definitions * * Copyright (c) 2012 The Chromium OS Authors. * * SPDX-License-Identifier: GPL-2.0+ */ #ifndef _CROS_MESSAGE_H #define _CROS_MESSAGE_H /* * Command interface between EC and AP, for LPC, I2C and SPI interfaces. * * This is copied from the Chromium OS Open Source Embedded Controller code. */ enum { /* The header byte, which follows the preamble */ MSG_HEADER = 0xec, MSG_HEADER_BYTES = 3, MSG_TRAILER_BYTES = 2, MSG_PROTO_BYTES = MSG_HEADER_BYTES + MSG_TRAILER_BYTES, /* Max length of messages */ MSG_BYTES = EC_PROTO2_MAX_PARAM_SIZE + MSG_PROTO_BYTES, }; #endif |