google/smaug: add new mainboard

This is an nvidia t210 based board.
This includes Chrome OS downstream up to Change-Id: Ic89ed54c.

Change-Id: I4d77659f4f2d21b1bbdcfc3467e1a166c02ddd47
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/10635
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/mainboard/google/smaug/chromeos.c

@@ -0,0 +1,111 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 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.
+ *
+ * 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.
+ */
+
+#include <boardid.h>
+#include <boot/coreboot_tables.h>
+#include <console/console.h>
+#include <ec/google/chromeec/ec.h>
+#include <ec/google/chromeec/ec_commands.h>
+#include <string.h>
+#include <vendorcode/google/chromeos/chromeos.h>
+
+#include "gpio.h"
+
+void fill_lb_gpios(struct lb_gpios *gpios)
+{
+	int count = 0;
+
+	/* Write Protect: active low */
+	gpios->gpios[count].port = WRITE_PROTECT_L;
+	gpios->gpios[count].polarity = ACTIVE_LOW;
+	gpios->gpios[count].value = gpio_get(WRITE_PROTECT_L);
+	strncpy((char *)gpios->gpios[count].name, "write protect",
+		GPIO_MAX_NAME_LENGTH);
+	count++;
+
+	/* Recovery: active high */
+	gpios->gpios[count].port = -1;
+	gpios->gpios[count].polarity = ACTIVE_HIGH;
+	gpios->gpios[count].value = get_recovery_mode_switch();
+	strncpy((char *)gpios->gpios[count].name, "recovery",
+		GPIO_MAX_NAME_LENGTH);
+	count++;
+
+	/* TODO(furquan): add lid switch */
+
+	/* Power: active low / high depending on board id */
+	gpios->gpios[count].port = POWER_BUTTON;
+	gpios->gpios[count].polarity = ACTIVE_LOW;
+	gpios->gpios[count].value = -1;
+	strncpy((char *)gpios->gpios[count].name, "power",
+		GPIO_MAX_NAME_LENGTH);
+	count++;
+
+	/* Developer: virtual GPIO active high */
+	gpios->gpios[count].port = -1;
+	gpios->gpios[count].polarity = ACTIVE_HIGH;
+	gpios->gpios[count].value = get_developer_mode_switch();
+	strncpy((char *)gpios->gpios[count].name, "developer",
+		GPIO_MAX_NAME_LENGTH);
+	count++;
+
+	/* EC in RW: active high */
+	gpios->gpios[count].port = EC_IN_RW;
+	gpios->gpios[count].polarity = ACTIVE_HIGH;
+	gpios->gpios[count].value = -1;
+	strncpy((char *)gpios->gpios[count].name, "EC in RW",
+		GPIO_MAX_NAME_LENGTH);
+	count++;
+
+	/* Reset: active low (output) */
+	gpios->gpios[count].port = AP_SYS_RESET_L;
+	gpios->gpios[count].polarity = ACTIVE_LOW;
+	gpios->gpios[count].value = -1;
+	strncpy((char *)gpios->gpios[count].name, "reset",
+		GPIO_MAX_NAME_LENGTH);
+	count++;
+
+	gpios->size = sizeof(*gpios) + (count * sizeof(struct lb_gpio));
+	gpios->count = count;
+
+	printk(BIOS_ERR, "Added %d GPIOS size %d\n", count, gpios->size);
+}
+
+int get_developer_mode_switch(void)
+{
+	return 0;
+}
+
+int get_recovery_mode_switch(void)
+{
+	uint32_t ec_events;
+
+	ec_events = google_chromeec_get_events_b();
+
+	/* Enter recovery mode either on keyboard recovery / fastboot event. */
+	return !!((ec_events &
+		   EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY)) ||
+		  (ec_events &
+		   EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_FASTBOOT)));
+}
+
+int get_write_protect_state(void)
+{
+	return !gpio_get(WRITE_PROTECT_L);
+}