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authorHung-ying Tyan <tyanh@chromium.org>2013-05-15 18:27:28 +0800
committerTom Rini <trini@ti.com>2013-06-26 10:07:11 -0400
commit88364387c60dc72549ccf7f2d595cbf847ab4e17 (patch)
treedb7d5c034dd87ef6fbdf7bc8c26df453d7af9e20 /include/cros_ec_message.h
parentca85eb8c4271509aaac1ccb26ae3eb1a7827b4e6 (diff)
downloadu-boot-88364387c60dc72549ccf7f2d595cbf847ab4e17.tar.gz
cros: add cros_ec driver
This patch adds the cros_ec driver that implements the protocol for communicating with Google's ChromeOS embedded controller. Signed-off-by: Bernie Thompson <bhthompson@chromium.org> Signed-off-by: Bill Richardson <wfrichar@chromium.org> Signed-off-by: Che-Liang Chiou <clchiou@chromium.org> Signed-off-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Gabe Black <gabeblack@chromium.org> Signed-off-by: Hung-ying Tyan <tyanh@chromium.org> Signed-off-by: Louis Yung-Chieh Lo <yjlou@chromium.org> Signed-off-by: Randall Spangler <rspangler@chromium.org> Signed-off-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Vincent Palatin <vpalatin@chromium.org> Acked-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/cros_ec_message.h')
-rw-r--r--include/cros_ec_message.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/include/cros_ec_message.h b/include/cros_ec_message.h
new file mode 100644
index 0000000000..a2421c7ba4
--- /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