mb/google/asurada: Add Chrome OS GPIOs

Add the Chrome OS specific GPIOs (WP, EC, H1, ...) GPIOs.

BUG=None
TEST=emerge-asurada coreboot; # also boots into emmc
BRANCH=None

Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Change-Id: Ieeeee88a09ae4c3af15e2ae93a29684d30dde493
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46386
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/asurada/Makefile.inc

@@ -2,12 +2,15 @@ subdirs-y += sdram_params/
 
 bootblock-y += memlayout.ld
 bootblock-y += bootblock.c
+bootblock-y += chromeos.c
 
 verstage-y += memlayout.ld
+verstage-y += chromeos.c
 verstage-y += reset.c
 
 romstage-y += memlayout.ld
 romstage-y += boardid.c
+romstage-y += chromeos.c
 romstage-y += romstage.c
 romstage-y += sdram_configs.c
 

src/mainboard/google/asurada/bootblock.c

@@ -3,8 +3,12 @@
 #include <bootblock_common.h>
 #include <soc/spi.h>
 
+#include "gpio.h"
+
 void bootblock_mainboard_init(void)
 {
 	mtk_spi_init(CONFIG_EC_GOOGLE_CHROMEEC_SPI_BUS, SPI_PAD0_MASK, 1 * MHz, 0);
 	mtk_spi_init(CONFIG_DRIVER_TPM_SPI_BUS, SPI_PAD0_MASK, 1 * MHz, 0);
+	setup_chromeos_gpios();
+	gpio_eint_configure(GPIO_H1_AP_INT, IRQ_TYPE_EDGE_RISING);
 }

src/mainboard/google/asurada/chromeos.c

@@ -5,16 +5,35 @@
 #include <gpio.h>
 #include <security/tpm/tis.h>
 
+#include "gpio.h"
+
+void setup_chromeos_gpios(void)
+{
+	gpio_input(GPIO_WP);
+	gpio_input_pullup(GPIO_EC_AP_INT);
+	gpio_input_pullup(GPIO_EC_IN_RW);
+	gpio_input_pullup(GPIO_H1_AP_INT);
+	gpio_input_pullup(GPIO_SD_CD);
+	gpio_output(GPIO_RESET, 0);
+}
+
 void fill_lb_gpios(struct lb_gpios *gpios)
 {
+	struct lb_gpio chromeos_gpios[] = {
+		{GPIO_EC_IN_RW.id, ACTIVE_LOW, -1, "EC in RW"},
+		{GPIO_EC_AP_INT.id, ACTIVE_LOW, -1, "EC interrupt"},
+		{GPIO_H1_AP_INT.id, ACTIVE_HIGH, -1, "TPM interrupt"},
+		{GPIO_SD_CD.id, ACTIVE_HIGH, -1, "SD card detect"},
+	};
+	lb_add_gpios(gpios, chromeos_gpios, ARRAY_SIZE(chromeos_gpios));
 }
 
 int get_write_protect_state(void)
 {
-	return 0;
+	return !gpio_get(GPIO_WP);
 }
 
 int tis_plat_irq_status(void)
 {
-	return 0;
+	return gpio_eint_poll(GPIO_H1_AP_INT);
 }

src/mainboard/google/asurada/gpio.h

@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __MAINBOARD_GOOGLE_ASURADA_GPIO_H__
+#define __MAINBOARD_GOOGLE_ASURADA_GPIO_H__
+
+#include <soc/gpio.h>
+
+/* AP_FLASH_WP */
+#define GPIO_WP		GPIO(EINT14)
+#define GPIO_EC_AP_INT	GPIO(EINT5)
+#define GPIO_EC_IN_RW	GPIO(ANT_SEL8)
+#define GPIO_H1_AP_INT	GPIO(ANT_SEL9)
+/* SD Card Detection */
+#define GPIO_SD_CD	GPIO(EINT17)
+/* AP_EC_WARM_RST_REQ */
+#define GPIO_RESET	GPIO(CAM_PDN2)
+
+void setup_chromeos_gpios(void);
+
+#endif