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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
|
|
