google/oak: Implement the code which reads GPIOs for ChromeOS.

BUG=none
BRANCH=none
TEST=emerge-oak corebootk

Change-Id: Ic1a0d640cac7fd98acd06d619736303fa449c0a1
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: ce465e8cbdf6465c072e476a91a400d78c959218
Original-Change-Id: Iade51db02f45264fdffe387e0563b60e637c0710
Original-Signed-off-by: Yidi Lin <yidi.lin@mediatek.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/292674
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/12606
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/mainboard/google/oak/bootblock.c

@@ -24,6 +24,8 @@
 #include <soc/pericfg.h>
 #include <soc/pinmux.h>
 
+#include "gpio.h"
+
 static void i2c_set_gpio_pinmux(void)
 {
 	gpio_set_mode(PAD_SDA1, PAD_SDA1_FUNC_SDA1);
@@ -45,4 +47,6 @@ void bootblock_mainboard_init(void)
 
 	/* set i2c related gpio */
 	i2c_set_gpio_pinmux();
+
+	setup_chromeos_gpios();
 }

src/mainboard/google/oak/chromeos.c

@@ -18,10 +18,88 @@
  */
 
 #include <boot/coreboot_tables.h>
+#include <console/console.h>
+#include <ec/google/chromeec/ec.h>
+#include <ec/google/chromeec/ec_commands.h>
+#include <gpio.h>
+#include <string.h>
 #include <vendorcode/google/chromeos/chromeos.h>
 
+#include "gpio.h"
+
+void setup_chromeos_gpios(void)
+{
+	gpio_input(WRITE_PROTECT);
+	gpio_input_pullup(EC_IN_RW);
+	gpio_input_pullup(EC_IRQ);
+	gpio_input_pullup(LID);
+	gpio_input_pullup(POWER_BUTTON);
+	gpio_output(EC_SUSPEND_L, 1);
+}
+
 void fill_lb_gpios(struct lb_gpios *gpios)
 {
+	int count = 0;
+
+	/* Write protect : active low */
+	gpios->gpios[count].port = WRITE_PROTECT;
+	gpios->gpios[count].polarity = ACTIVE_LOW;
+	gpios->gpios[count].value = gpio_get(WRITE_PROTECT);
+	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++;
+
+	/* Lid: active high */
+	gpios->gpios[count].port = LID;
+	gpios->gpios[count].polarity = ACTIVE_HIGH;
+	gpios->gpios[count].value = -1;
+	strncpy((char *)gpios->gpios[count].name, "lid", GPIO_MAX_NAME_LENGTH);
+	count++;
+
+	/* Power: active high */
+	gpios->gpios[count].port = POWER_BUTTON;
+	gpios->gpios[count].polarity = ACTIVE_HIGH;
+	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++;
+
+	/* EC interrupt: GPIO active low */
+	gpios->gpios[count].port = EC_IRQ;
+	gpios->gpios[count].polarity = ACTIVE_LOW;
+	gpios->gpios[count].value = -1;
+	strncpy((char *)gpios->gpios[count].name, "EC interrupt",
+		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)
@@ -31,10 +109,14 @@ int get_developer_mode_switch(void)
 
 int get_recovery_mode_switch(void)
 {
-	return 0;
+	uint32_t ec_events;
+
+	ec_events = google_chromeec_get_events_b();
+	return !!(ec_events &
+		  EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY));
 }
 
 int get_write_protect_state(void)
 {
-	return 0;
+	return !gpio_get(WRITE_PROTECT);
 }

src/mainboard/google/oak/gpio.h

@@ -0,0 +1,40 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 MediaTek 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __MAINBOARD_GOOGLE_OAK_GPIO_H__
+#define __MAINBOARD_GOOGLE_OAK_GPIO_H__
+#include <soc/pinmux.h>
+
+enum {
+	LID		= PAD_EINT12,
+	/* Write Protect */
+	WRITE_PROTECT	= PAD_EINT4,
+	/* Power button */
+	POWER_BUTTON	= PAD_EINT14,
+	/* EC Interrupt */
+	EC_IRQ          = PAD_EINT0,
+	/* EC in RW signal */
+	EC_IN_RW	= PAD_DAIPCMIN,
+	/* EC AP suspend */
+	EC_SUSPEND_L	= PAD_KPROW1,
+};
+
+void setup_chromeos_gpios(void);
+
+#endif /* __MAINBOARD_GOOGLE_OAK_GPIO_H__ */