mb/google/sarien: Enable Wilco EC

The Sarien mainboard uses the newly added Wilco EC.

- enable CONFIG_EC_GOOGLE_WILCO
- add the device and host command ranges to the devicetree
- have the mainboard SMI handlers call the EC handlers
- add EC and SuperIO devices to the ACPI DSDT
- call the early init hook for serial setup

Change-Id: Idfc4a4af52a613de910ec313d657167918aa2619
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/29411
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/google/sarien/Kconfig

@@ -6,6 +6,7 @@ config BOARD_GOOGLE_BASEBOARD_SARIEN
 	select DRIVERS_I2C_HID
 	select DRIVERS_SPI_ACPI
 	select DRIVERS_PS2_KEYBOARD
+	select EC_GOOGLE_WILCO
 	select GENERIC_SPD_BIN
 	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES

src/mainboard/google/sarien/Makefile.inc

@@ -19,6 +19,8 @@ ramstage-y += ramstage.c
 
 romstage-y += romstage.c
 
+smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c
+
 bootblock-$(CONFIG_CHROMEOS) += chromeos.c
 ramstage-$(CONFIG_CHROMEOS) += chromeos.c
 romstage-$(CONFIG_CHROMEOS) += chromeos.c

src/mainboard/google/sarien/bootblock.c

@@ -14,6 +14,7 @@
  */
 
 #include <bootblock_common.h>
+#include <ec/google/wilco/bootblock.h>
 #include <soc/gpio.h>
 #include <variant/gpio.h>
 
@@ -29,4 +30,5 @@ static void early_config_gpio(void)
 void bootblock_mainboard_init(void)
 {
 	early_config_gpio();
+	wilco_ec_early_init();
 }

src/mainboard/google/sarien/dsdt.asl

@@ -13,6 +13,8 @@
  * GNU General Public License for more details.
  */
 
+#include <variant/ec.h>
+
 DefinitionBlock(
 	"dsdt.aml",
 	"DSDT",
@@ -50,4 +52,15 @@ DefinitionBlock(
 
 	/* Chipset specific sleep states */
 	#include <soc/intel/cannonlake/acpi/sleepstates.asl>
+
+#if IS_ENABLED(CONFIG_EC_GOOGLE_WILCO)
+	/* Chrome OS Embedded Controller */
+	Scope (\_SB.PCI0.LPCB)
+	{
+		/* ACPI code for EC SuperIO functions */
+		#include <ec/google/wilco/acpi/superio.asl>
+		/* ACPI code for EC functions */
+		#include <ec/google/wilco/acpi/ec.asl>
+	}
+#endif
 }

src/mainboard/google/sarien/smihandler.c

@@ -0,0 +1,35 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google LLC
+ *
+ * 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 <cpu/x86/smm.h>
+#include <ec/google/wilco/smm.h>
+#include <soc/smm.h>
+#include <variant/ec.h>
+
+void mainboard_smi_espi_handler(void)
+{
+	wilco_ec_smi_espi();
+}
+
+void mainboard_smi_sleep(u8 slp_typ)
+{
+	wilco_ec_smi_sleep(slp_typ);
+}
+
+int mainboard_smi_apmc(u8 apmc)
+{
+	wilco_ec_smi_apmc(apmc);
+	return 0;
+}

src/mainboard/google/sarien/variants/arcada/devicetree.cb

@@ -8,6 +8,11 @@ chip soc/intel/cannonlake
 	register "gpe0_dw1" = "PMC_GPP_C"
 	register "gpe0_dw2" = "PMC_GPP_D"
 
+	# EC host command ranges
+	register "gen1_dec" = "0x00040931" # 0x930-0x937
+	register "gen2_dec" = "0x00040941" # 0x940-0x947
+	register "gen3_dec" = "0x000c0951" # 0x950-0x95f
+
 	# FSP configuration
 	register "SaGv" = "3"
 	register "HeciEnabled" = "1"
@@ -152,7 +157,11 @@ chip soc/intel/cannonlake
 		device pci 1e.1 off end # UART #1
 		device pci 1e.2 off end # GSPI #0
 		device pci 1e.3 off end # GSPI #1
-		device pci 1f.0 on  end # LPC/eSPI
+		device pci 1f.0 on
+			chip ec/google/wilco
+				device pnp 0c09.0 on end
+			end
+		end # LPC/eSPI
 		device pci 1f.1 on  end # P2SB
 		device pci 1f.2 on  end # Power Management Controller
 		device pci 1f.3 on  end # Intel HDA

src/mainboard/google/sarien/variants/arcada/include/variant/ec.h

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google LLC
+ *
+ * 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.
+ */
+
+#ifndef VARIANT_EC_H
+#define VARIANT_EC_H
+
+#include <soc/gpe.h>
+#include <soc/gpio.h>
+
+/* EC wake pin */
+#define EC_WAKE_PIN		GPE0_DW1_12
+
+/* eSPI virtual wire reporting */
+#define EC_SCI_GPI		GPE0_ESPI
+
+/* Enable PS/2 keyboard */
+#define SIO_EC_ENABLE_PS2K
+
+#endif

src/mainboard/google/sarien/variants/sarien/devicetree.cb

@@ -8,6 +8,11 @@ chip soc/intel/cannonlake
 	register "gpe0_dw1" = "PMC_GPP_C"
 	register "gpe0_dw2" = "PMC_GPP_D"
 
+	# EC host command ranges
+	register "gen1_dec" = "0x00040931" # 0x930-0x937
+	register "gen2_dec" = "0x00040941" # 0x940-0x947
+	register "gen3_dec" = "0x000c0951" # 0x950-0x95f
+
 	# FSP configuration
 	register "SaGv" = "3"
 	register "HeciEnabled" = "1"
@@ -152,7 +157,11 @@ chip soc/intel/cannonlake
 		device pci 1e.1 off end # UART #1
 		device pci 1e.2 off end # GSPI #0
 		device pci 1e.3 off end # GSPI #1
-		device pci 1f.0 on  end # LPC/eSPI
+		device pci 1f.0 on
+			chip ec/google/wilco
+				device pnp 0c09.0 on end
+			end
+		end # LPC/eSPI
 		device pci 1f.1 on  end # P2SB
 		device pci 1f.2 on  end # Power Management Controller
 		device pci 1f.3 on  end # Intel HDA

src/mainboard/google/sarien/variants/sarien/include/variant/ec.h

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google LLC
+ *
+ * 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.
+ */
+
+#ifndef VARIANT_EC_H
+#define VARIANT_EC_H
+
+#include <soc/gpe.h>
+#include <soc/gpio.h>
+
+/* EC wake pin */
+#define EC_WAKE_PIN		GPE0_DW1_12
+
+/* eSPI virtual wire reporting */
+#define EC_SCI_GPI		GPE0_ESPI
+
+/* Enable PS/2 keyboard */
+#define SIO_EC_ENABLE_PS2K
+
+#endif