From 6b239d8e08a8cf61bbadc562a3e397386da737f3 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <tpearson@raptorengineering.com>
Date: Mon, 22 May 2017 13:14:06 -0500
Subject: mb/asus/kgpe-d16: Add BMC KCS to ACPI

The BMC KCS interface must be advertised to the host OS in order
for automatic load of the ipmi module to work.  Expose the KCS
interface via ACPI.

Change-Id: Ia251334ae44668c2260d8d2e816f85f1f62faac7
Signed-off-by: Timothy Pearson <tpearson@raptorengineering.com>
Reviewed-on: https://review.coreboot.org/c/19822
Reviewed-by: Piotr Kubaj <pkubaj@anongoth.pl>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
 src/mainboard/asus/kgpe-d16/dsdt.asl | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to 'src/mainboard/asus/kgpe-d16')

diff --git a/src/mainboard/asus/kgpe-d16/dsdt.asl b/src/mainboard/asus/kgpe-d16/dsdt.asl
index efb67a558c..ea524887cb 100644
--- a/src/mainboard/asus/kgpe-d16/dsdt.asl
+++ b/src/mainboard/asus/kgpe-d16/dsdt.asl
@@ -53,6 +53,9 @@ DefinitionBlock (
 
 	#include <southbridge/amd/common/acpi/sleepstates.asl>
 
+	/* IPMI KCS enable */
+	Name (KCSE, 0x1)
+
 	/* The _PIC method is called by the OS to choose between interrupt
 		* routing via the i8259 interrupt controller or the APIC.
 		*
@@ -486,6 +489,13 @@ DefinitionBlock (
 				Name (_HID, EisaId ("PNP0A05"))
 				Name (_ADR, 0x00140003)
 
+				OperationRegion (BMRG, SystemIO, 0xca2, 0x02) /* BMC KCS registers */
+				Field (BMRG, AnyAcc, NoLock, Preserve)
+				{
+					BMRI, 8,	/* Index */
+					BMRD, 8,	/* Data */
+				}
+
 				/* Real Time Clock Device */
 				Device(RTC0) {
 					Name(_HID, EISAID("PNP0B00"))   /* AT Real Time Clock (not PIIX4 compatible) */
@@ -607,6 +617,27 @@ DefinitionBlock (
 						})
 					}
 				}
+
+				Device (KCS1) {   /* IPMI KCS */
+					Name (_HID, EISAID ("IPI0001"))		/* ASpeed BMC */
+					Method (_STA, 0, NotSerialized) {
+						If (KCSE) {			/* Detection enabled */
+							If (LNotEqual (BMRD, 0xff)) {
+								Return (0x0f)	/* Device present */
+							}
+							Return (Zero)
+						}
+						Return (Zero)
+					}
+					Method (_CRS, 0) {
+						Return (ResourceTemplate() {
+							IO(Decode16, 0x0ca2, 0x0ca2, 0x01, 0x02)
+						})
+					}
+					Method (_IFT, 0, NotSerialized) {	/* Interface type */
+						Return (One)			/* KCS interface */
+					}
+				}
 			}
 
 			/* High Precision Event Timer */
-- 
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