soc/braswell: Add method for Wifi regulatory domain

Get the WRDD domain code from VPD and put it in global nvs.
WRDD method in wifi.asl returns this value from global nvs.
This wifi.asl should be included in dsdt.asl under the root port where wifi
module resides.

Original-Reviewed-on: https://chromium-review.googlesource.com/314373
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-by: Pratikkumar V Prajapati <pratikkumar.v.prajapati@intel.com>
Original-Commit-Queue: Hannah Williams <hannah.williams@intel.com>

Change-Id: I809d28f10e80681471a785e604df102fb943a983
Signed-off-by: fdurairx <felixx.durairaj@intel.com>
Signed-off-by: Hannah Williams <hannah.williams@intel.com>
Reviewed-on: https://review.coreboot.org/12745
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/soc/intel/braswell/acpi.c

@@ -44,6 +44,7 @@
 #include <string.h>
 #include <types.h>
 #include <vendorcode/google/chromeos/gnvs.h>
+#include <wrdd.h>
 
 #define MWAIT_RES(state, sub_state)                         \
 	{                                                   \
@@ -523,6 +524,13 @@ void southcluster_inject_dsdt(device_t device)
 
 	if (gnvs) {
 		acpi_create_gnvs(gnvs);
+		/* Fill in the Wifi Region id */
+		if (IS_ENABLED(CONFIG_HAVE_REGULATORY_DOMAIN)) {
+			gnvs->cid1 = wifi_regulatory_domain();
+		} else {
+
+			gnvs->cid1 = WRDD_DEFAULT_REGULATORY_DOMAIN;
+		}
 		acpi_save_gnvs((unsigned long)gnvs);
 		/* And tell SMI about it */
 		smm_setup_structures(gnvs, NULL, NULL);

src/soc/intel/braswell/acpi/globalnvs.asl

@@ -51,6 +51,7 @@ Field (GNVS, ByteAcc, NoLock, Preserve)
 	PM1I,	 32,	/* 0x15 - System Wake Source - PM1 Index */
 	GPEI,	 32,	/* 0x19 - GPE Wake Source */
 	BDID,	 8,	/* 0x1d - Board ID */
+	CID1,	 16,	/* 0x1A - Wifi Domain Type */
 
 	/* Device Config */
 	Offset (0x20),

src/soc/intel/braswell/include/soc/nvs.h

@@ -44,7 +44,7 @@ typedef struct {
 	u32	pm1i; /* 0x15 - System Wake Source - PM1 Index */
 	u32	gpei; /* 0x19 - GPE Wake Source */
 	u8	bdid; /* 0x1d - Board ID */
-	u8	rsvd1[2];
+	u16     cid1; /* 0x1a - Wifi Country Identifier */
 
 	/* Device Config */
 	u8	s5u0; /* 0x20 - Enable USB0 in S5 */

src/soc/intel/common/acpi/wifi.asl

@@ -0,0 +1,42 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ * Copyright (C) 2011 Google Inc.
+ * Copyright (C) 2015 Intel Corp.
+ *
+ * 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.
+ */
+
+Device (WIFI)
+{
+	Name (_ADR, Zero)
+	OperationRegion(WIXX, PCI_Config, 0x00, 0x10)
+	Name (WRDX, Package()
+	{
+		// Revision
+		0,
+		Package()
+		{
+			// DomainType, 0x7:WiFi
+			0x00000007,
+			// Default Regulatory Domain Country identifier
+			0x4150,
+		}
+	})
+	Method(WRDD,0,Serialized)
+	{
+		Store(\CID1,Index (DeRefOf (Index (WRDX, 1)), 1)) // Country identifier
+
+		Return(WRDX)
+	}
+
+}
+