Patch set updated for coreboot: 765e943 mainboard/jetway/nf81-t56n-lf: Provide ACPI thermal zone

[Edward O'Callaghan]

Edward O'Callaghan ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/5889

-gerrit

commit 765e94315d18272b5b3eb476a0574cad9394584a
Author: Edward O'Callaghan 
Date:   Sat May 31 16:19:40 2014 +1000

mainboard/jetway/nf81-t56n-lf: Provide ACPI thermal zone

NOTFORMERGE - yet -
    Has a SystemIO conflict with 0x...220 - 0x...227 from somewhere else???

Change-Id: Ibb0295154fca23a3819953db0119692b26096e34
    Signed-off-by: Edward O'Callaghan 
---
 src/mainboard/jetway/nf81-t56n-lf/acpi/gpe.asl     |  26 +++-
 .../jetway/nf81-t56n-lf/acpi/mainboard.asl         |   1 +
 src/mainboard/jetway/nf81-t56n-lf/acpi/thermal.asl | 146 ++++++++++++++++++++-
 3 files changed, 167 insertions(+), 6 deletions(-)

diff --git a/src/mainboard/jetway/nf81-t56n-lf/acpi/gpe.asl b/src/mainboard/jetway/nf81-t56n-lf/acpi/gpe.asl
index bb47ded..a30698a 100644
--- a/src/mainboard/jetway/nf81-t56n-lf/acpi/gpe.asl
+++ b/src/mainboard/jetway/nf81-t56n-lf/acpi/gpe.asl
@@ -2,6 +2,7 @@
  * This file is part of the coreboot project.
  *
  * Copyright (C) 2011 Advanced Micro Devices, Inc.
+ * Copyright (C) 2014 Edward O'Callaghan 
  *
  * 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
@@ -17,7 +18,14 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */

-Scope(_GPE) {	/* Start Scope GPE */
+Scope(_GPE)
+{
+	OperationRegion (IP, SystemIO, 0x0225, 0x02)
+	Field (IP, ByteAcc, NoLock, Preserve)
+	{
+		INDX,   8,
+		DAT0,   8
+	}

/*  General event 3  */
    Method(_L03) {
@@ -31,9 +39,21 @@ Scope(_GPE) {	/* Start Scope GPE */
    }

/*  Temp warning (TWarn) event  */
-	Method(_L09) {
+	Method(_L09, 0, NotSerialized)
+	{
    	/* DBGO("\_GPE\_L09\n") */
-		/* Notify (_TZ.TZ00, 0x80) */
+		Store (GBYT (0x66), Local0)
+		If (LNotEqual (And (Local0, 0x02), Zero))
+		{
+			Notify (_TZ.THRM, 0x80)
+		}
+	}
+
+	Method (GBYT, 1, NotSerialized)
+	{
+		Store (Arg0, INDX)
+		Store (DAT0, Local0)
+		Return (Local0)
    }

/*  USB controller PME#  */
diff --git a/src/mainboard/jetway/nf81-t56n-lf/acpi/mainboard.asl b/src/mainboard/jetway/nf81-t56n-lf/acpi/mainboard.asl
index 1f532cf..59027b7 100644
--- a/src/mainboard/jetway/nf81-t56n-lf/acpi/mainboard.asl
+++ b/src/mainboard/jetway/nf81-t56n-lf/acpi/mainboard.asl
@@ -33,6 +33,7 @@ Name(SSFG, 0x0D)	/* S1 support: bit 0, S2 Support: bit 1, etc. S0 & S5 assumed *
 Name(OSVR, 3)	/* Assume nothing. WinXp = 1, Vista = 2, Linux = 3, WinCE = 4 */
 Name(OSV, Ones)	/* Assume nothing */
 Name(PMOD, One)	/* Assume APIC */
+Name (TPCH, Zero) /* Thermal zone channel */

Scope(_SB) {
    Method(OSFL, 0){
diff --git a/src/mainboard/jetway/nf81-t56n-lf/acpi/thermal.asl b/src/mainboard/jetway/nf81-t56n-lf/acpi/thermal.asl
index 2f50475..f061d0c 100644
--- a/src/mainboard/jetway/nf81-t56n-lf/acpi/thermal.asl
+++ b/src/mainboard/jetway/nf81-t56n-lf/acpi/thermal.asl
@@ -1,6 +1,8 @@
 /*
  * This file is part of the coreboot project.
  *
+ * Copyright (C) 2014 Edward O'Callaghan 
+ *
  * 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.
@@ -15,7 +17,145 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */

-/* Thermal Zones have been #if 0 for a long time.
- * Removing it for now because it doesn't seem to
- * do anything when enabled anyway.
+/* Thermal Zones. */
+
+/*
+ * Thermal Events
+ * --------------
+ *
+ * When OSPM receives a temperature change notification, it evaluates the
+ * thermal zone's temperature interfaces to retrieve current temperature
+ * values. OSPM compares the current temperature values against the temperature
+ * thresholds. If any temperature is >= a corresponding "active trip point"
+ * (_ACx) then OSPM will preform "active cooling". If any temperature is >= a
+ * corresponding "passive trip point" (_PSV) then OSPM will preform "passive
+ * cooling". If _HOT >= _TMP then OSPM transitions into S4 sleep and if _HOT >=
+ * _CRT then OSPM must shutdown the system!
+ *
+ *    +--+
+ *    |90|<----- _CRT: Critical shutdown threshold
+ *    |  |
+ *    |75|<----- _ACT0: Fan high speed threshold
+ *    |65|<----- _ACT1: Fan low speed threshold
+ *    |  |
+ *    |50|<----- _PSV: Passive cooling threshold
+ *    +--+
  */
+
+
+Scope (_TZ)
+{
+    OperationRegion (IP, SystemIO, 0x0225, 0x02)
+    Field (IP, ByteAcc, NoLock, Preserve)
+    {
+        INDX, 8,
+        DAT0, 8
+    }
+
+	// Handler for throttle requests on this platform
+	//  0 = Stop throttling
+	//  1 = Start throttling
+	Method (THRT, 1, Serialized)
+	{
+		If (LEqual (Arg0, 0)) {
+			/* Disable Power Limit */
+//			_SB.PCI0.MCHC.CTLD ()
+		} Else {
+			/* Enable Power Limit */
+//			_SB.PCI0.MCHC.CTLE (\F0PW)
+		}
+	}
+
+	ThermalZone (THRM)
+	{
+	/* TODO: Change to Super I/O event driven OSPM later.. */
+/* Done with an SCI. AML handler must execute a Notifiy(thermal_zone, 0x80) to inform OSPM a meaningful temp change occured */
+/* Do this^^^ in superio.asl */
+		Name (_TC1, 0x02)
+		Name (_TC2, 0x05)
+
+		// Thermal zone polling frequency: 10 seconds
+		Name (_TZP, 100)
+
+		// Thermal sampling period for passive cooling: 2 seconds
+		Name (_TSP, 20)
+
+		/*
+		 * ACPI expects all temperatures to be represented in tenths of degrees
+		 */
+		// Convert from Degrees C to 1/10 Kelvin for ACPI
+		Method (CTOK, 1) {
+			// 10th of Degrees C
+			Multiply (Arg0, 10, Local0)
+
+			// Convert to Kelvin
+			Add (Local0, 2732, Local0)
+
+			Return (Local0)
+		}
+
+		// Threshold for OS to shutdown
+		Method (_CRT, 0, Serialized)
+		{
+			Return (CTOK (\TCRT))
+//            Return (CTOK (STMP ()))
+		}
+
+/*
+		// Threshold for passive cooling
+		Method (_PSV, 0, Serialized)
+		{
+			Return (CTOK (\TPSV))
+		}
+
+		// Processors used for passive cooling
+		Method (_PSL, 0, Serialized)
+		{
+			Return (\PPKG ())
+		}
+*/
+
+
+		// Returns the thermal zone's current operating temperature
+		Method (_TMP, 0, Serialized)
+		{
+            If (LEqual (TPCH, One))
+            {
+                While (LGreater (GBYT (0x7A), 0x7E))
+                {
+                    Sleep (0xFA)
+                    Store (One, Local1)
+                    Multiply (0x0A, Local1, Local1)
+                    Add (Local1, 0x0AAC, Local1)
+                    Return (Local1)
+                }
+            }
+
+            Return (CTOK (CTMP ()))
+		}
+
+        Method (STMP, 0, NotSerialized)
+        {
+            Store (GBYT (0x82), Local0)
+            Return (Local0)
+        }
+
+        Method (CTMP, 0, NotSerialized)
+        {
+            Store (GBYT (0x7A), Local0)
+            If (LGreaterEqual (Local0, 0x65))
+            {
+                Store (0x30, Local0)
+            }
+
+            Return (Local0)
+        }
+
+        Method (GBYT, 1, NotSerialized)
+        {
+            Store (Arg0, INDX)
+            Store (DAT0, Local0)
+            Return (Local0)
+        }
+    }
+}