From f281b6d175905e625f481bf8b8a2b7b10d037582 Mon Sep 17 00:00:00 2001
From: Patrick Rudolph <siro@das-labor.org>
Date: Mon, 14 Aug 2017 18:41:32 +0200
Subject: ec/lenovo/h8/ssdt: Add UWB ACPI interface

Add ACPI methods GUWB and SUWB for thinkpad_acpi.
Required for power control of the UWB module.

Change-Id: I8f9a56e45c0d765b0e06b8d3600bd3575dd09491
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/21003
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
---
 src/ec/lenovo/h8/acpi/ec.asl       |  3 +++
 src/ec/lenovo/h8/acpi/thinkpad.asl | 32 ++++++++++++++++++++++++++++++++
 src/ec/lenovo/h8/ssdt.c            |  2 ++
 3 files changed, 37 insertions(+)

(limited to 'src/ec/lenovo')

diff --git a/src/ec/lenovo/h8/acpi/ec.asl b/src/ec/lenovo/h8/acpi/ec.asl
index 17afba2dec..8a1b9c4343 100644
--- a/src/ec/lenovo/h8/acpi/ec.asl
+++ b/src/ec/lenovo/h8/acpi/ec.asl
@@ -46,6 +46,9 @@ Device(EC)
 		Offset (0x30),
 				    , 6,
 				ALMT, 1,	/* Audio Mute + LED */
+		Offset (0x31),
+				    , 2,
+				UWBE, 1,	/* Ultra Wideband enable */
 		Offset (0x3a),
 				AMUT, 1,	/* Audio Mute (internal use) */
 				    , 3,
diff --git a/src/ec/lenovo/h8/acpi/thinkpad.asl b/src/ec/lenovo/h8/acpi/thinkpad.asl
index a0812e5d48..e67bc8f65f 100644
--- a/src/ec/lenovo/h8/acpi/thinkpad.asl
+++ b/src/ec/lenovo/h8/acpi/thinkpad.asl
@@ -20,6 +20,7 @@ Device (HKEY)
 	External (\HBDC, IntObj)
 	External (\HWAN, IntObj)
 	External (\HKBL, IntObj)
+	External (\HUWB, IntObj)
 
 	Name (_HID, EisaId ("IBM0068"))
 
@@ -259,4 +260,35 @@ Device (HKEY)
 			Store (And(Arg0, 1), \_SB.PCI0.LPCB.EC.WWEB)
 		}
 	}
+
+	/*
+	 * Returns the current state:
+	 *  Bit 0: UWB HW present
+	 *  Bit 1: UWB radio enabled
+	 */
+	Method (GUWB, 0)
+	{
+		If (HUWB) {
+			Store (One, Local0)
+			If(\_SB.PCI0.LPCB.EC.UWBE)
+			{
+				Or(Local0, 2, Local0)
+			}
+			Return (Local0)
+		} Else {
+			Return (0)
+		}
+	}
+
+	/*
+	 * Set the current state:
+	 *  Bit 1: UWB radio enabled
+	 */
+	Method (SUWB, 1)
+	{
+		If (HUWB) {
+			ShiftRight (And(Arg0, 2), 1, Local0)
+			Store (Local0, \_SB.PCI0.LPCB.EC.UWBE)
+		}
+	}
 }
diff --git a/src/ec/lenovo/h8/ssdt.c b/src/ec/lenovo/h8/ssdt.c
index 4df4bd8a87..eccefe25ee 100644
--- a/src/ec/lenovo/h8/ssdt.c
+++ b/src/ec/lenovo/h8/ssdt.c
@@ -51,6 +51,8 @@ void h8_ssdt_generator(struct device *dev)
 	acpigen_write_name_byte("HWAN", h8_has_wwan(dev) ? ONE_OP : ZERO_OP);
 	acpigen_write_name_byte("HKBL", (conf && conf->has_keyboard_backlight) ?
 				ONE_OP : ZERO_OP);
+	acpigen_write_name_byte("HUWB", (conf && conf->has_uwb) ?
+				ONE_OP : ZERO_OP);
 
 	acpigen_pop_len(); /* Scope HKEY */
 }
-- 
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