[coreboot-gerrit] New patch to review for coreboot: intel/wifi: Add WRDD ACPI method

[Patrick Georgi (pgeorgi@google.com)]

Patrick Georgi (pgeorgi at google.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/13838

-gerrit

commit b36ac74af0243558e8e22890006c675b8e930d95
Author: Duncan Laurie <dlaurie at chromium.org>
Date:   Thu Feb 25 08:44:06 2016 -0800

    intel/wifi: Add WRDD ACPI method
    
    Add an ACPI file containing a generic WRDD method that is used
    by Intel wireless kernel drivers to determine the country code
    to be used for regulatory domain configuration of the wireless
    radios.
    
    This requires an NVS variable called 'CID1' to provide an
    ISO-3166-2 alpha-2 country code or it will just return 0 instead.
    
    This is implemented as a bare method because this needs to be
    included directly into the wifi device that is defined by the
    mainboard as it may have board-specific settings like _PRW that
    need to be provided as well.
    
    BUG=chrome-os-partner:50516
    BRANCH=glados
    TEST=boot on chell with 'region'='us' in VPD and see that it is
    properly read out by calling WRDD method on the WiFi device.
    
    Change-Id: I27a5e27f65d05ff62a0e79a87a32c1ef0c5d0ef3
    Signed-off-by: Patrick Georgi <pgeorgi at google.com>
    Original-Commit-Id: 2da0cf76ca3cc5e3dfbc4a0859733523de780cf5
    Original-Change-Id: I9d83c3938cceafc77ef8747a5c47f586ee84437e
    Original-Signed-off-by: Duncan Laurie <dlaurie at chromium.org>
    Original-Reviewed-on: https://chromium-review.googlesource.com/329294
    Original-Reviewed-by: Aaron Durbin <adurbin at chromium.org>
---
 src/drivers/intel/wifi/acpi/wrdd.asl | 37 ++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/src/drivers/intel/wifi/acpi/wrdd.asl b/src/drivers/intel/wifi/acpi/wrdd.asl
new file mode 100644
index 0000000..6f071ad
--- /dev/null
+++ b/src/drivers/intel/wifi/acpi/wrdd.asl
@@ -0,0 +1,37 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Google Inc.
+ * Copyright (C) 2016 Intel Corporation
+ *
+ * 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.
+ */
+
+/*
+ * This method is used by the Intel wireless kernel drivers to determine
+ * the proper country code for regulatory domain configuration.
+ *
+ * It requires an NVS field called CID1 to be present that provides the
+ * ISO-3166-2 alpha-2 country code.
+ */
+Method (WRDD, 0, Serialized)
+{
+	Name (WRDX, Package () {
+		0, /* Revision */
+		Package () {
+			0x00000007,	/* Domain Type, 0x7:WiFi */
+			0x00000000,	/* No Default Country Identifier */
+		}
+	})
+
+	/* Replace Country Identifier with value from NVS */
+	Store (\CID1, Index (DeRefOf (Index (WRDX, 1)), 1))
+	Return (WRDX)
+}