baytrail: Basic DPTF framework

This is not complete yet but it compiles and doesn't cause
any issues by itself.  It is tied into the EC pretty closely
so that is part of the same commit.

Once we have more of the EC support done it will need some
more work to make use of those new interfaces properly.

BUG=chrome-os-partner:17279
BRANCH=none
TEST=build and boot on rambi, dump DSDT and look over \_SB.DPTF

Change-Id: I4b27e38baae18627a275488d77944208950b98bd
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/179459
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/5002
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/ec/google/chromeec/acpi/ec.asl

@@ -25,6 +25,7 @@
 
 // Mainboard specific throttle handler
 External (\_TZ.THRT, MethodObj)
+External (\_SB.DPTF.TEVT, MethodObj)
 
 Device (EC0)
 {
@@ -47,6 +48,7 @@ Device (EC0)
 		TSTB, 8,	// Test Byte
 		TSTC, 8,	// Complement of Test Byte
 		KBLV, 8,	// Keyboard Backlight
+		FAND, 8,	// Set Fan Duty Cycle
 	}
 
 	OperationRegion (EMEM, SystemIO, EC_LPC_ADDR_MEMMAP, EC_MEMMAP_SIZE)
@@ -89,6 +91,8 @@ Device (EC0)
 		BMOD, 64,	// Battery Model String
 		BSER, 64,	// Battery Serial String
 		BTYP, 64,	// Battery Type String
+		Offset (0x80),
+		ALS0, 16,	// ALS reading 0 in lux
 	}
 
 	Method (TINS, 1, Serialized)
@@ -134,6 +138,40 @@ Device (EC0)
 		Store (LIDS, \LIDS)
 	}
 
+	/* Read requested temperature and check against EC error values */
+	Method (TSRD, 1, Serialized)
+	{
+		Store (\_SB.PCI0.LPCB.EC0.TINS (Arg0), Local0)
+
+		/* Check for sensor not calibrated */
+		If (LEqual (Local0, \_SB.PCI0.LPCB.EC0.TNCA)) {
+			Return (Zero)
+		}
+
+		/* Check for sensor not present */
+		If (LEqual (Local0, \_SB.PCI0.LPCB.EC0.TNPR)) {
+			Return (Zero)
+		}
+
+		/* Check for sensor not powered */
+		If (LEqual (Local0, \_SB.PCI0.LPCB.EC0.TNOP)) {
+			Return (Zero)
+		}
+
+		/* Check for sensor bad reading */
+		If (LEqual (Local0, \_SB.PCI0.LPCB.EC0.TBAD)) {
+			Return (Zero)
+		}
+
+		/* Adjust by offset to get Kelvin */
+		Add (\_SB.PCI0.LPCB.EC0.TOFS, Local0, Local0)
+
+		/* Convert to 1/10 Kelvin */
+		Multiply (Local0, 10, Local0)
+
+		Return (Local0)
+	}
+
 	// Lid Closed Event
 	Method (_Q01, 0, NotSerialized)
 	{
@@ -247,6 +285,39 @@ Device (EC0)
 		}
 	}
 
+	/*
+	 * Dynamic Platform Thermal Framework support
+	 */
+
+	/*
+	 * Set Aux Trip Point 0
+	 *   Arg0 = Temp Sensor ID
+	 *   Arg1 = Value to set
+	 */
+	Method (PAT0, 2, Serialized)
+	{
+	}
+
+	/*
+	 * Set Aux Trip Point 1
+	 *   Arg0 = Temp Sensor ID
+	 *   Arg1 = Value to set
+	 */
+	Method (PAT1, 2, Serialized)
+	{
+	}
+
+	/*
+	 * DPTF Thermal Threshold Event
+	  */
+	Method (_Q14, 0, Serialized)
+	{
+		Store ("EC: DPTF THERMAL THRESHOLD", Debug)
+		If (CondRefOf (\_SB.DPTF.TEVT, Local0)) {
+			\_SB.DPTF.TEVT ()
+		}
+	}
+
 	#include "ac.asl"
 	#include "battery.asl"
 }

src/soc/intel/baytrail/acpi.c

@@ -338,8 +338,8 @@ static int generate_P_state_entries(int core, int cores_per_package)
 	/* Write _PCT indicating use of FFixedHW */
 	len = acpigen_write_empty_PCT();
 
-	/* Write _PPC with no limit on supported P-state */
+	/* Write _PPC with NVS specified limit on supported P-state */
-	len += acpigen_write_PPC(0);
+	len += acpigen_write_PPC_NVS();
 
 	/* Write PSD indicating configured coordination type */
 	len += acpigen_write_PSD_package(core, 1, coord_type);

src/soc/intel/baytrail/acpi/dptf/charger.asl

@@ -0,0 +1,36 @@
+Device (TCHG)
+{
+	Name (_HID, "INT3403")
+	Name (_UID, 0)
+	Name (PTYP, 0x0B)
+	Name (_STR, Unicode("Battery Charger"))
+
+	Method (_STA)
+	{
+		If (LEqual (\DPTE, One)) {
+			Return (0xF)
+		} Else {
+			Return (0x0)
+		}
+	}
+
+	Name (PPSS, Package ()
+	{
+		Package () { 0, 0, 0, 0, 0, 0x880, "mA", 0 }, /* 2.1A */
+		Package () { 0, 0, 0, 0, 1, 0x800, "mA", 0 }, /* 2.0A */
+		Package () { 0, 0, 0, 0, 2, 0x600, "mA", 0 }, /* 1.5A */
+		Package () { 0, 0, 0, 0, 3, 0x400, "mA", 0 }, /* 1.0A */
+		Package () { 0, 0, 0, 0, 4, 0x200, "mA", 0 }, /* 0.5A */
+		Package () { 0, 0, 0, 0, 5, 0x000, "mA", 0 }, /* 0.0A */
+	})
+
+	Method (PPPC)
+	{
+		Return (0)
+	}
+
+	Method (SPPC, 1, Serialized)
+	{
+		/* TODO: Tell EC to limit battery charging */
+	}
+}

src/soc/intel/baytrail/acpi/dptf/cpu.asl

@@ -0,0 +1,180 @@
+External (\_PR.CPU0._TSS, MethodObj)
+External (\_PR.CPU0._TPC, MethodObj)
+External (\_PR.CPU0._PTC, PkgObj)
+External (\_PR.CPU0._TSD, PkgObj)
+External (\_PR.CPU0._PPC, MethodObj)
+External (\_PR.CPU0._PSS, MethodObj)
+
+Device (TCPU)
+{
+	Name (_HID, EISAID ("INT3401"))
+	Name (_UID, 0)
+	Name (CTYP, 0) /* Passive Cooling by default */
+
+	Method (_STA)
+	{
+		If (LEqual (\DPTE, One)) {
+			Return (0xF)
+		} Else {
+			Return (0x0)
+		}
+	}
+
+	/*
+	 * Processor Throttling Controls
+	 */
+
+	Method (_TSS)
+	{
+		If (CondRefOf (\_PR.CPU0._TSS)) {
+			Return (\_PR.CPU0._TSS)
+		} Else {
+			Return (Package ()
+			{
+				Package () { 0, 0, 0, 0, 0 }
+			})
+		}
+	}
+
+	Method (_TPC)
+	{
+		If (CondRefOf (\_PR.CPU0._TPC)) {
+			Return (\_PR.CPU0._TPC)
+		} Else {
+			Return (0)
+		}
+	}
+
+	Method (_PTC)
+	{
+		If (CondRefOf (\_PR.CPU0._PTC)) {
+			Return (\_PR.CPU0._PTC)
+		} Else {
+			Return (Package ()
+			{
+				Buffer () { 0 },
+				Buffer () { 0 }
+			})
+		}
+	}
+
+	Method (_TSD)
+	{
+		If (CondRefOf (\_PR.CPU0._TSD)) {
+			Return (\_PR.CPU0._TSD)
+		} Else {
+			Return (Package ()
+			{
+				Package () { 5, 0, 0, 0, 0 }
+			})
+		}
+	}
+
+	Method (_TDL)
+	{
+		If (CondRefOf (\_PR.CPU0._TSS)) {
+			Store (SizeOf (\_PR.CPU0._TSS ()), Local0)
+			Decrement (Local0)
+			Return (Local0)
+		} Else {
+			Return (0)
+		}
+	}
+
+	/*
+	 * Processor Performance Control
+	 */
+
+	Method (_PPC)
+	{
+		If (CondRefOf (\_PR.CPU0._PPC)) {
+			Return (\_PR.CPU0._PPC)
+		} Else {
+			Return (0)
+		}
+	}
+
+	Method (SPPC, 1)
+	{
+		Store (Arg0, \PPCM)
+
+		/* Notify OS to re-read _PPC limit on each CPU */
+		\PPCN ()
+	}
+
+	Method (_PSS)
+	{
+		If (CondRefOf (\_PR.CPU0._PSS)) {
+			Return (\_PR.CPU0._PSS)
+		} Else {
+			Return (Package ()
+			{
+				Package () { 0, 0, 0, 0, 0, 0 }
+			})
+		}
+	}
+
+	Method (_PDL)
+	{
+		If (CondRefOf (\_PR.CPU0._PSS)) {
+			Store (SizeOf (\_PR.CPU0._PSS ()), Local0)
+			Decrement (Local0)
+			Return (Local0)
+		} Else {
+			Return (0)
+		}
+	}
+
+	/*
+	 * DPTF
+	 */
+
+	/* 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)
+	}
+
+	/* Critical temperature from NVS */
+	Method (_CRT, 0, Serialized)
+	{
+		Return (CTOK (\TCRT))
+	}
+
+	/* Hot temperature is 3 less than critical temperature */
+	Method (_HOT, 0, Serialized)
+	{
+		Return (CTOK (Subtract (\TCRT, 3)))
+	}
+
+	Method (_PSV, 0, Serialized)
+	{
+		If (CTYP) {
+			Return (CTOK (\TACT))
+		} Else {
+			Return (CTOK (\TPSV))
+		}
+	}
+
+	/* Set Cooling Policy
+	 *   Arg0 - Cooling policy mode, 1=active, 0=passive
+	 *   Arg1 - Acoustic Limit
+	 *   Arg2 - Power Limit
+	 */
+	Method (_SCP, 3, Serialized)
+	{
+		If (LEqual (Arg0, 0)) {
+			Store (0, CTYP)
+		} Else {
+			Store (1, CTYP)
+		}
+
+		/* DPTF Thermal Trip Points Changed Event */
+		Notify (TCPU, 0x91)
+	}
+}

src/soc/intel/baytrail/acpi/dptf/dptf.asl

@@ -0,0 +1,51 @@
+Device (DPTF)
+{
+	Name (_HID, EISAID ("INT3400"))
+	Name (_UID, 0)
+
+	Name (IDSP, Package()
+	{
+		/* DPPM Passive Policy 1.0 */
+		ToUUID("42A441D6-AE6A-462B-A84B-4A8CE79027D3"),
+
+		/*  DPPM Critical Policy */
+		ToUUID("97C68AE7-15FA-499c-B8C9-5DA81D606E0A"),
+
+		/* DPPM Cooling Policy */
+		ToUUID("16CAF1B7-DD38-40ED-B1C1-1B8A1913D531"),
+	})
+
+	Method (_STA)
+	{
+		If (LEqual (\DPTE, One)) {
+			Return (0xF)
+		} Else {
+			Return (0x0)
+		}
+	}
+
+	Method (_OSC, 4, Serialized)
+	{
+		/* TODO: Enable/Disable EC control of thermals/charging */
+		Return (Arg3)
+	}
+
+	Method (_TRT)
+	{
+		Return (\_SB.DTRT)
+	}
+
+	/* Thermal Threshold Event Handler */
+	Method (TEVT, 0, Serialized)
+	{
+	}
+
+	/* Include CPU Participant */
+	#include "cpu.asl"
+
+	/* Include Thermal Participants */
+	#include "thermal.asl"
+
+	/* Include Charger Participant */
+	#include "charger.asl"
+}

src/soc/intel/baytrail/acpi/dptf/thermal.asl

@@ -0,0 +1,116 @@
+#ifdef DPTF_TSR0_SENSOR_ID
+Device (TSR0)
+{
+	Name (_HID, EISAID ("INT3403"))
+	Name (_UID, 1)
+	Name (PTYP, 0x03)
+	Name (TMPI, DPTF_TSR0_SENSOR_ID)
+	Name (_STR, Unicode (DPTF_TSR0_SENSOR_NAME))
+
+	Method (_STA)
+	{
+		If (LEqual (\DPTE, One)) {
+			Return (0xF)
+		} Else {
+			Return (0x0)
+		}
+	}
+
+	Method (_TMP, 0, Serialized)
+	{
+		Return (\_SB.PCI0.LPCB.EC0.TSRD (TMPI))
+	}
+
+	Name (PATC, 2)
+
+	/* Set Aux Trip Point */
+	Method (PAT0, 1, Serialized)
+	{
+		\_SB.PCI0.LPCB.EC0.PAT0 (TMPI, Arg0)
+	}
+
+	/* Set Aux Trip Point */
+	Method (PAT1, 1, Serialized)
+	{
+		\_SB.PCI0.LPCB.EC0.PAT1 (TMPI, Arg0)
+	}
+}
+#endif
+
+#ifdef DPTF_TSR1_SENSOR_ID
+Device (TSR1)
+{
+	Name (_HID, EISAID ("INT3403"))
+	Name (_UID, 2)
+	Name (PTYP, 0x03)
+	Name (TMPI, DPTF_TSR1_SENSOR_ID)
+	Name (_STR, Unicode (DPTF_TSR1_SENSOR_NAME))
+
+	Method (_STA)
+	{
+		If (LEqual (\DPTE, One)) {
+			Return (0xF)
+		} Else {
+			Return (0x0)
+		}
+	}
+
+	Method (_TMP, 0, Serialized)
+	{
+		Return (\_SB.PCI0.LPCB.EC0.TSRD (TMPI))
+	}
+
+	Name (PATC, 2)
+
+	/* Set Aux Trip Point */
+	Method (PAT0, 1, Serialized)
+	{
+		\_SB.PCI0.LPCB.EC0.PAT0 (TMPI, Arg0)
+	}
+
+	/* Set Aux Trip Point */
+	Method (PAT1, 1, Serialized)
+	{
+		\_SB.PCI0.LPCB.EC0.PAT1 (TMPI, Arg0)
+	}
+}
+#endif
+
+#ifdef DPTF_TSR2_SENSOR_ID
+Device (TSR2)
+{
+	Name (_HID, EISAID ("INT3403"))
+	Name (_UID, 3)
+	Name (PTYP, 0x03)
+	Name (TMPI, DPTF_TSR2_SENSOR_ID)
+	Name (_STR, Unicode (DPTF_TSR2_SENSOR_NAME))
+
+	Method (_STA)
+	{
+		If (LEqual (\DPTE, One)) {
+			Return (0xF)
+		} Else {
+			Return (0x0)
+		}
+	}
+
+	Method (_TMP, 0, Serialized)
+	{
+		Return (\_SB.PCI0.LPCB.EC0.TSRD (TMPI))
+	}
+
+	Name (PATC, 2)
+
+	/* Set Aux Trip Point */
+	Method (PAT0, 1, Serialized)
+	{
+		\_SB.PCI0.LPCB.EC0.PAT0 (TMPI, Arg0)
+	}
+
+	/* Set Aux Trip Point */
+	Method (PAT1, 1, Serialized)
+	{
+		\_SB.PCI0.LPCB.EC0.PAT1 (TMPI, Arg0)
+	}
+}
+#endif

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

@@ -51,6 +51,7 @@ Field (GNVS, ByteAcc, NoLock, Preserve)
 	PCNT,	 8,	// 0x11 - Processor count
 	TPMP,	 8,	// 0x12 - TPM Present and Enabled
 	TLVL,	 8,	// 0x13 - Throttle Level
+	PPCM,	 8,	// 0x14 - Maximum P-state usable by OS
 
 	/* Device Config */
 	Offset (0x20),
@@ -58,6 +59,10 @@ Field (GNVS, ByteAcc, NoLock, Preserve)
 	S5U1,	 8,	// 0x21 - Enable USB1 in S5
 	S3U0,	 8,	// 0x22 - Enable USB0 in S3
 	S3U1,	 8,	// 0x23 - Enable USB1 in S3
+	TACT,	 8,	// 0x24 - Thermal Active trip point
+	TPSV,	 8,	// 0x25 - Thermal Passive trip point
+	TCRT,	 8,	// 0x26 - Thermal Critical trip point
+	DPTE,	 8,	// 0x27 - Enable DPTF
 
 	/* Base addresses */
 	Offset (0x30),

src/soc/intel/baytrail/baytrail/nvs.h

@@ -37,14 +37,19 @@ typedef struct {
 	u8	pcnt; /* 0x11 - Processor Count */
 	u8	tpmp; /* 0x12 - TPM Present and Enabled */
 	u8	tlvl; /* 0x13 - Throttle Level */
-	u8	rsvd1[12];
+	u8	ppcm; /* 0x14 - Maximum P-state usable by OS */
+	u8	rsvd1[11];
 
 	/* Device Config */
 	u8	s5u0; /* 0x20 - Enable USB0 in S5 */
 	u8	s5u1; /* 0x21 - Enable USB1 in S5 */
 	u8	s3u0; /* 0x22 - Enable USB0 in S3 */
 	u8	s3u1; /* 0x23 - Enable USB1 in S3 */
-	u8	rsvd2[12];
+	u8	tact; /* 0x24 - Thermal Active trip point */
+	u8	tpsv; /* 0x25 - Thermal Passive trip point */
+	u8	tcrt; /* 0x26 - Thermal Critical trip point */
+	u8	dpte; /* 0x27 - Enable DPTF */
+	u8	rsvd2[8];
 
 	/* Base Addresses */
 	u32	cmem; /* 0x30 - CBMEM TOC */