LXR uboot/include/cros_ec

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