cros: add cros_ec driver

[karo-tx-uboot.git] / include / cros_ec_message.h

diff --git a/include/cros_ec_message.h b/include/cros_ec_message.h
new file mode 100644 (file)
index 0000000..a2421c7
--- /dev/null
+++ b/include/cros_ec_message.h
@@ -0,0 +1,44 @@
+/*
+ * Chromium OS Matrix Keyboard Message Protocol definitions
+ *
+ * Copyright (c) 2012 The Chromium OS Authors.
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#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