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88364387 HT |
1 | /* |
2 | * Chromium OS Matrix Keyboard Message Protocol definitions | |
3 | * | |
4 | * Copyright (c) 2012 The Chromium OS Authors. | |
88364387 | 5 | * |
1a459660 | 6 | * SPDX-License-Identifier: GPL-2.0+ |
88364387 HT |
7 | */ |
8 | ||
9 | #ifndef _CROS_MESSAGE_H | |
10 | #define _CROS_MESSAGE_H | |
11 | ||
12 | /* | |
13 | * Command interface between EC and AP, for LPC, I2C and SPI interfaces. | |
14 | * | |
15 | * This is copied from the Chromium OS Open Source Embedded Controller code. | |
16 | */ | |
17 | enum { | |
18 | /* The header byte, which follows the preamble */ | |
19 | MSG_HEADER = 0xec, | |
20 | ||
21 | MSG_HEADER_BYTES = 3, | |
22 | MSG_TRAILER_BYTES = 2, | |
23 | MSG_PROTO_BYTES = MSG_HEADER_BYTES + MSG_TRAILER_BYTES, | |
24 | ||
25 | /* Max length of messages */ | |
836bb6e8 | 26 | MSG_BYTES = EC_PROTO2_MAX_PARAM_SIZE + MSG_PROTO_BYTES, |
88364387 HT |
27 | }; |
28 | ||
29 | #endif |