cheza: board-level GPIO support

Change-Id: I64e79904c7ad95091ea29d9f80444c4e3b493471
Signed-off-by: T Michael Turney <mturney@codeaurora.org>
Reviewed-on: https://review.coreboot.org/c/29298
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

3 files changed, 59 insertions, 1 deletions

diff --git a/src/mainboard/google/cheza/board.h b/src/mainboard/google/cheza/board.h
new file mode 100644
index 0000000000..f83ca06003
--- /dev/null
+++ b/src/mainboard/google/cheza/board.h
@@ -0,0 +1,30 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2018, The Linux Foundation.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#ifndef __COREBOOT_SRC_MAINBOARD_GOOGLE_CHEZA_BOARD_H
+#define __COREBOOT_SRC_MAINBOARD_GOOGLE_CHEZA_BOARD_H
+
+#include <gpio.h>
+#include <soc/gpio.h>
+
+#define GPIO_EC_IN_RW	GPIO(11)
+#define GPIO_AP_EC_INT	GPIO(122)
+#define GPIO_AP_SUSPEND	GPIO(126)
+#define GPIO_WP_STATE	GPIO(128)
+#define GPIO_H1_AP_INT	GPIO(129)
+
+void setup_chromeos_gpios(void);
+
+#endif  /* ! __COREBOOT_SRC_MAINBOARD_GOOGLE_CHEZA_BOARD_H */
diff --git a/src/mainboard/google/cheza/bootblock.c b/src/mainboard/google/cheza/bootblock.c
index 6718d52156..c72856dee6 100644
--- a/src/mainboard/google/cheza/bootblock.c
+++ b/src/mainboard/google/cheza/bootblock.c
@@ -15,8 +15,9 @@
 
 #include <bootblock_common.h>
 #include <timestamp.h>
+#include "board.h"
 
 void bootblock_mainboard_init(void)
 {
-
+	setup_chromeos_gpios();
 }
diff --git a/src/mainboard/google/cheza/chromeos.c b/src/mainboard/google/cheza/chromeos.c
index 538e46fa4b..1c2c4f5c5f 100644
--- a/src/mainboard/google/cheza/chromeos.c
+++ b/src/mainboard/google/cheza/chromeos.c
@@ -14,8 +14,35 @@
  */
 
 #include <boot/coreboot_tables.h>
+#include <bootmode.h>
+#include "board.h"
+
+int get_write_protect_state(void)
+{
+	return !gpio_get(GPIO_WP_STATE);
+}
+
+void setup_chromeos_gpios(void)
+{
+	gpio_input_pullup(GPIO_EC_IN_RW);
+	gpio_input_pullup(GPIO_AP_EC_INT);
+	gpio_output(GPIO_AP_SUSPEND, 1);
+	gpio_input(GPIO_WP_STATE);
+	gpio_input_pullup(GPIO_H1_AP_INT);
+}
 
 void fill_lb_gpios(struct lb_gpios *gpios)
 {
+	struct lb_gpio chromeos_gpios[] = {
+		{GPIO_EC_IN_RW.addr, ACTIVE_LOW, gpio_get(GPIO_EC_IN_RW),
+			"EC in RW"},
+		{GPIO_AP_EC_INT.addr, ACTIVE_LOW, gpio_get(GPIO_AP_EC_INT),
+			"EC interrupt"},
+		{GPIO_WP_STATE.addr, ACTIVE_LOW, gpio_get(GPIO_WP_STATE),
+			"write protect"},
+		{GPIO_H1_AP_INT.addr, ACTIVE_LOW, gpio_get(GPIO_H1_AP_INT),
+			"TPM interrupt"},
+	};
 
+	lb_add_gpios(gpios, chromeos_gpios, ARRAY_SIZE(chromeos_gpios));
 }