google/chell: perform early init for CAR *stage

In order to support both separate verstage and a verified boot after
romstage one needs to ensure the proper GPIO and EC configuration
been complete. Therefore, move that logic to
car_mainboard_post_console_init() in car.c file which gets called
in the early flow of a CAR stage (either verstage or romstage).

BUG=chrome-os-partner:44827
BRANCH=glados
TEST=Built chell w/ separate verstage and booted.

Change-Id: Ic728c2904006376fdc2b27b512f72173a2260be3
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 42d190af8996fea894305ebe686afbfda5f2b8a5
Original-Change-Id: I95aeb97737d0ddfa6c53269c9d14db16ed5e47cc
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/324072
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/13582
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 35 insertions, 0 deletions

diff --git a/src/mainboard/google/chell/car.c b/src/mainboard/google/chell/car.c
new file mode 100644
index 0000000000..7791b92980
--- /dev/null
+++ b/src/mainboard/google/chell/car.c
@@ -0,0 +1,35 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2016 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 <ec/google/chromeec/ec.h>
+#include <fsp/car.h>
+#include <soc/gpio.h>
+#include "gpio.h"
+
+static void early_config_gpio(void)
+{
+	/* This is a hack for FSP because it does things in MemoryInit()
+	 * which it shouldn't be. We have to prepare certain gpios here
+	 * because of the brokenness in FSP. */
+	gpio_configure_pads(early_gpio_table, ARRAY_SIZE(early_gpio_table));
+}
+
+void car_mainboard_post_console_init(void)
+{
+	/* Ensure the EC and PD are in the right mode for recovery */
+	google_chromeec_early_init();
+
+	early_config_gpio();
+}