google/enguarde: Upstream Lenovo N21 Chromebook

Migrate google/enguarde (Lenovo N21 Chromebook) from Chromium tree to
upstream, using google/rambi as a reference.

original source:
branch firmware-enguarde-5216.201.B
commit cf1f57b [Enguarde: Adjust rx delay for norm.]

TEST=built and booted Linux on enguarde with full functionality

blobs required for working image:
VGA BIOS (vgabios.bin)
firmware descriptor (ifd.bin)
Intel ME firmware (me.bin)
MRC (mrc.elf)
external reference code (refcode.elf)

Change-Id: I3ccda29d1e095d8b1b36766cda913172f72233a7
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/15444
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/src/mainboard/google/enguarde/ec.c b/src/mainboard/google/enguarde/ec.c
new file mode 100644
index 0000000000..33c8d24dd8
--- /dev/null
+++ b/src/mainboard/google/enguarde/ec.c
@@ -0,0 +1,48 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Google Inc.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+#include <arch/acpi.h>
+#include <types.h>
+#include <console/console.h>
+#include <ec/google/chromeec/ec.h>
+#include "ec.h"
+
+void mainboard_ec_init(void)
+{
+	printk(BIOS_DEBUG, "mainboard_ec_init\n");
+	post_code(0xf0);
+
+	/* Restore SCI event mask on resume. */
+	if (acpi_is_wakeup_s3()) {
+		google_chromeec_log_events(MAINBOARD_EC_LOG_EVENTS |
+					   MAINBOARD_EC_S3_WAKE_EVENTS);
+
+		/* Disable SMI and wake events */
+		google_chromeec_set_smi_mask(0);
+
+		/* Clear pending events */
+		while (google_chromeec_get_event() != 0);
+		google_chromeec_set_sci_mask(MAINBOARD_EC_SCI_EVENTS);
+	} else {
+		google_chromeec_log_events(MAINBOARD_EC_LOG_EVENTS |
+					   MAINBOARD_EC_S5_WAKE_EVENTS);
+		google_chromeec_set_smi_mask(MAINBOARD_EC_SMI_EVENTS);
+	}
+
+	/* Clear wake events, these are enabled on entry to sleep */
+	google_chromeec_set_wake_mask(0);
+
+	post_code(0xf1);
+}