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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
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