trogdor: Add mainboard gpio support

Change-Id: I06cdb8eaaf7f74b47e1d1283dcaa765674ceaa45
Signed-off-by: T Michael Turney <mturney@codeaurora.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36070
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/trogdor/Makefile.inc

@@ -16,15 +16,23 @@
 
 bootblock-y += memlayout.ld
 bootblock-y += reset.c
+bootblock-y += boardid.c
+bootblock-y += chromeos.c
+bootblock-y += bootblock.c
 
 verstage-y += memlayout.ld
 verstage-y += reset.c
+verstage-y += boardid.c
+verstage-y += chromeos.c
 
 romstage-y += memlayout.ld
 romstage-y += romstage.c
 romstage-y += reset.c
+romstage-y += boardid.c
+romstage-y += chromeos.c
 
 ramstage-y += memlayout.ld
 ramstage-y += mainboard.c
 ramstage-y += reset.c
 ramstage-y += chromeos.c
+ramstage-y += boardid.c

src/mainboard/google/trogdor/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_TROGDOR_BOARD_H_
+#define _COREBOOT_SRC_MAINBOARD_GOOGLE_TROGDOR_BOARD_H_
+
+#include <gpio.h>
+#include <soc/gpio.h>
+
+#define GPIO_EC_IN_RW	GPIO(118)
+#define GPIO_AP_EC_INT	GPIO(94)
+#define GPIO_AP_SUSPEND	GPIO(20)
+#define GPIO_WP_STATE	GPIO(42)
+#define GPIO_H1_AP_INT	GPIO(21)
+
+void setup_chromeos_gpios(void);
+
+#endif /* _COREBOOT_SRC_MAINBOARD_GOOGLE_TROGDOR_BOARD_H_ */

src/mainboard/google/trogdor/boardid.c

@@ -0,0 +1,54 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google LLC
+ * Copyright 2019 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 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 <boardid.h>
+#include <gpio.h>
+
+uint32_t board_id(void)
+{
+	static uint32_t id = UNDEFINED_STRAPPING_ID;
+
+	const gpio_t pins[] = {[2] = GPIO(31), [1] = GPIO(93), [0] = GPIO(33)};
+
+	if (id == UNDEFINED_STRAPPING_ID)
+		id = gpio_base2_value(pins, ARRAY_SIZE(pins));
+
+	return id;
+}
+
+uint32_t ram_code(void)
+{
+	static uint32_t id = UNDEFINED_STRAPPING_ID;
+
+	const gpio_t pins[] = {[1] = GPIO(91), [0] = GPIO(29)};
+
+	if (id == UNDEFINED_STRAPPING_ID)
+		id = gpio_base2_value(pins, ARRAY_SIZE(pins));
+
+	return id;
+}
+
+uint32_t sku_id(void)
+{
+	static uint32_t id = UNDEFINED_STRAPPING_ID;
+
+	const gpio_t pins[] = {[1] = GPIO(90), [0] = GPIO(114)};
+
+	if (id == UNDEFINED_STRAPPING_ID)
+		id = gpio_base2_value(pins, ARRAY_SIZE(pins));
+
+	return id;
+}

src/mainboard/google/trogdor/bootblock.c

@@ -0,0 +1,22 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2018-2019, 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.
+ */
+
+#include <bootblock_common.h>
+#include "board.h"
+
+void bootblock_mainboard_init(void)
+{
+	setup_chromeos_gpios();
+}

src/mainboard/google/trogdor/chromeos.c

@@ -15,13 +15,34 @@
 
 #include <boot/coreboot_tables.h>
 #include <bootmode.h>
+#include "board.h"
 
 int get_write_protect_state(void)
 {
-	return 0;
+	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, !get_write_protect_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));
 }