| /* |
| * 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_HOST_PARAM_SIZE + MSG_PROTO_BYTES, |
| }; |
| |
| #endif |