Add support for "Butterfly" Chromebook

We're happy to announce coreboot support for the "Butterfly"
Chromebook, a.k.a HP Pavilion Chromebook.

More information at:
http://www.google.com/intl/en/chrome/devices/hp-pavilion-chromebook.html

This commit also includes support for the ENE KB3940Q embedded controller
running on Quanta's firmware.

Change-Id: I194f847a94005218ec04eeba091c3257ac459510
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/2359
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Tested-by: build bot (Jenkins)

9 files changed, 979 insertions, 0 deletions

diff --git a/src/ec/quanta/ene_kb3940q/Kconfig b/src/ec/quanta/ene_kb3940q/Kconfig
new file mode 100644
index 0000000000..4258948d7a
--- /dev/null
+++ b/src/ec/quanta/ene_kb3940q/Kconfig
@@ -0,0 +1,4 @@
+config EC_QUANTA_ENE_KB3940Q
+	bool
+	help
+	Interface to QUANTA ENE KB3940Q Embedded Controller.
diff --git a/src/ec/quanta/ene_kb3940q/Makefile.inc b/src/ec/quanta/ene_kb3940q/Makefile.inc
new file mode 100644
index 0000000000..1ce9a46f88
--- /dev/null
+++ b/src/ec/quanta/ene_kb3940q/Makefile.inc
@@ -0,0 +1,4 @@
+ramstage-y += ec.c
+smm-y += ec.c
+
+smm-y += ../../../lib/delay.c
diff --git a/src/ec/quanta/ene_kb3940q/acpi/ac.asl b/src/ec/quanta/ene_kb3940q/acpi/ac.asl
new file mode 100644
index 0000000000..8c85fc335c
--- /dev/null
+++ b/src/ec/quanta/ene_kb3940q/acpi/ac.asl
@@ -0,0 +1,39 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011-2012 The Chromium OS Authors. All rights reserved.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+// Scope (EC0)
+
+Device (AC)
+{
+	Name (_HID, "ACPI0003")
+	Name (_PCL, Package () { \_SB })
+
+	Method (_PSR)
+	{
+		Store(ADPT, Local0)
+		Return(Local0)
+	}
+
+	Method (_STA)
+	{
+		Return (0x0F)
+	}
+}
diff --git a/src/ec/quanta/ene_kb3940q/acpi/battery.asl b/src/ec/quanta/ene_kb3940q/acpi/battery.asl
new file mode 100644
index 0000000000..8fbd9bba1b
--- /dev/null
+++ b/src/ec/quanta/ene_kb3940q/acpi/battery.asl
@@ -0,0 +1,159 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011-2012 The Chromium OS Authors. All rights reserved.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+/*
+ * The mainboard must define strings in the root scope to
+ * report device-specific battery information to the OS.
+ *
+ *  BATV: Vendor
+ */
+
+// Scope (EC0)
+
+Device (BATX)
+{
+	Name (_HID, EISAID ("PNP0C0A"))
+	Name (_UID, 1)
+	Name (_PCL, Package () { \_SB })
+
+	Name (PBIF, Package () {
+		0x00000001,  // 0 Power Unit: mAh
+		0xFFFFFFFF,  // 1 Design Capacity
+		0xFFFFFFFF,  // 2 Last Full Charge Capacity
+		0x00000001,  // 3 Battery Technology: Rechargeable
+		0xFFFFFFFF,  // 4 Design Voltage
+		0x000000FA,  // 5 Design Capacity of Warning
+		0x00000096,  // 6 Design Capacity of Low
+		0x0000000A,  // 7 Capacity Granularity 1
+		0x00000019,  // 8 Capacity Granularity 2
+		"",          // 9 Model Number
+		"",          // 10 Serial Number
+		"",          // 11 Battery Type
+		""           // 12 OEM Information
+	})
+
+	Name (PBST, Package () {
+		0x00000000,  // Battery State
+		0xFFFFFFFF,  // Battery Present Rate
+		0xFFFFFFFF,  // Battery Remaining Capacity
+		0xFFFFFFFF,  // Battery Present Voltage
+	})
+
+	// Workaround for full battery status, enabled by default
+	Name (BFWK, One)
+
+	// Method to enable full battery workaround
+	Method (BFWE)
+	{
+		Store (One, BFWK)
+	}
+
+	// Method to disable full battery workaround
+	Method (BFWD)
+	{
+		Store (Zero, BFWK)
+	}
+
+	// Device insertion/removal control method that returns a device’s status.
+	// Power resource object that evaluates to the current on or off state of
+	// the Power Resource.
+	Method (_STA, 0, Serialized)
+	{
+		If (BTIN) {
+			Return (0x1F)
+		} Else {
+			Return (0x0F)
+		}
+	}
+
+	Method (_BIF, 0, Serialized)
+	{
+		// Update fields from EC
+		Store (BDC0, Index (PBIF, 1)) // Batt Design Capacity
+		Store (BFC0, Index (PBIF, 2)) // Batt Last Full Charge Capacity
+		Store (BDV0, Index (PBIF, 4)) // Batt Design Voltage
+		Divide(BFC0, 0x64, Local0, Local1)
+		Multiply(Local1, 0x0A, Local0)
+		Store(Local0, Index(PBIF, 5))
+		Multiply(Local1, 0x05, Local0)
+		Store (Local0, Index (PBIF, 6))
+		Store (ToString(BATD), Index (PBIF, 9)) // Model Number
+		Store (ToDecimalString(BSN0), Index (PBIF, 10)) // Serial Number
+		Store (ToString(BCHM), Index (PBIF, 11)) // Battery Type
+		Store (\BATV, Index (PBIF, 12)) // OEM information
+
+		Return (PBIF)
+	}
+
+	Method (_BST, 0, Serialized)
+	{
+		//
+		// 0: BATTERY STATE
+		//
+		// bit 0 = discharging
+		// bit 1 = charging
+		// bit 2 = critical level
+		//
+
+		// Get battery state from EC
+		Store (BST0, Local0)
+		Store (Local0, Index (PBST, 0))
+
+		//
+		// 1: BATTERY PRESENT RATE/CURRENT
+		//
+		Store (BPC0, Local1)
+		If (LAnd (Local1, 0x8000)) {
+			Xor (Local1, 0xFFFF, Local1)
+			Increment (Local1)
+		}
+		Store (Local1, Index (PBST, 1))
+
+		//
+		// 2: BATTERY REMAINING CAPACITY
+		//
+		Store (BRC0, Local1)
+
+		If (LAnd (BFWK, LAnd (ADPT, LNot (Local0)))) {
+			// On AC power and battery is neither charging
+			// nor discharging.  Linux expects a full battery
+			// to report same capacity as last full charge.
+			// https://bugzilla.kernel.org/show_bug.cgi?id=12632
+			Store (BFC0, Local2)
+
+			// See if within ~3% of full
+			ShiftRight (Local2, 5, Local3)
+			If (LAnd (LGreater (Local1, Subtract (Local2, Local3)),
+			          LLess (Local1, Add (Local2, Local3))))
+			{
+				Store (Local2, Local1)
+			}
+		}
+		Store (Local1, Index (PBST, 2))
+
+		//
+		// 3: BATTERY PRESENT VOLTAGE
+		//
+		Store (BPV0, Index (PBST, 3))
+
+		Return (PBST)
+	}
+}
diff --git a/src/ec/quanta/ene_kb3940q/acpi/ec.asl b/src/ec/quanta/ene_kb3940q/acpi/ec.asl
new file mode 100644
index 0000000000..4e703feca5
--- /dev/null
+++ b/src/ec/quanta/ene_kb3940q/acpi/ec.asl
@@ -0,0 +1,280 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011-2012 The Chromium OS Authors. All rights reserved.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/*
+ * The mainboard must define a PNOT method to handle power
+ * state notifications and Notify CPU device objects to
+ * re-evaluate their _PPC and _CST tables.
+ */
+
+External (\_PR.CPU0._PPC, IntObj)
+
+Device (EC0)
+{
+	Name (_HID, EISAID ("PNP0C09"))
+	Name (_UID, 1)
+	Name (_GPE, Add(EC_SCI_GPI, 16))	// GPE for Runtime SCI
+
+	OperationRegion (ERAM, EmbeddedControl, 0x00, 0xff)
+	Field (ERAM, ByteAcc, Lock, Preserve)
+	{
+		// EC Name Space Configuration
+
+		Offset(0x40),
+		BDC0, 16,       // Batt Design Capacity                 ; 40h, 41h
+		BDV0, 16,       // Batt Design Voltage                  ; 42h, 43h
+		BFC0, 16,       // Batt Last Full Charge Capacity       ; 44h, 45h
+		BPC0, 16,       // Batt Current                         ; 46h, 47h
+		BRC0, 16,       // Batt Remaining Capacity              ; 48h, 49h
+		BPV0, 16,       // Batt Present Voltage                 ; 4Ah, 4Bh
+		BCG0, 16,       // Batt Charge current                  ; 4Ch, 4Dh
+		BACV, 16,       // Batt Charging Voltage                ; 4Eh, 4Fh
+		BTM0, 16,       // Batt Battery Temp                    ; 50h, 51h
+		BSN0, 16,       // Batt Serial Number                   ; 52h, 53h
+		BPCT, 16,       // Batt Percentage of full charge       ; 54h, 55h
+		BSSB, 16,       // BATT Battery Status SMB              ; 56h, 57h
+		CYC0, 16,       // Batt Cycle Counter                   ; 58h, 59h
+		BMD0, 16,       // Manufacture Date                     ; 5Ah, 5Bh
+		                // Batt Day                             ; BIT[4:0] (Day)
+		                // Batt Month                           ; BIT[9:5] (Month)
+		                // Batt Year                            ; BIT[15:10] (Year)
+
+
+		Offset(0x60),
+		BCHM, 32,       // Battery Chemistry                    ; 60h - 64h
+		BATD, 56,       // Battery Device name                  ; 64h - 6Ah
+
+		Offset(0x70),
+		ADPT, 1,        // AC Adapter Status for OS             ; 70h.0
+		ADPN, 1,        // AC Adapter H/W status                ; 70h.1
+		BTIN, 1,        // Battery Present                      ; 70h.2
+		BTBD, 1,        // Battery Malfunction                  ; 70h.3
+		ACMD, 1,        // ACPI Mode                            ; 70h.4
+		    , 1,        // Reserved                             ; 70h.5
+		SSBS, 1,        // 1=Standard BIOS, 0=Coreboot          ; 70h.6
+		PSTH, 1,        // Passive Thermal Policy               ; 70h.7
+		BST0, 8,        // Battery Status                       ; 71h
+		                // Bit0 : Discharging
+		                // Bit1 : Charging
+		                // Bit2 : Discharging and Critical Low
+		                // Bit3-7 : Reserved
+		LIDF, 1,        // Lid is open                          ; 72h.0
+		GPRC, 1,        // Recovery GPI Status                  ; 72h.1
+		    , 6,        // Reserved                             ; 72h.2-7
+		TPLD, 1,        // TouchPad LED Activation              ; 73h.0
+		TPST, 1,        // Touchpad LED Status                  ; 73h.1
+		    , 6,        // Reserved                             ; 73h.2-7
+
+		Offset(0x78),
+		CTMP, 8,        // Current CPU Temperature              ; 78h
+		SKTB, 8,        // GPU Temperature                      ; 79h
+		LTM1, 8,        // Local Temp 1                         ; 7Ah
+		LTM2, 8,        // Local Temp 2                         ; 7Bh
+		FTCH, 16,       // Fan Tachometer value                 ; 7Ch - 7Dh
+		FDBG, 16,       // Fan Debug - Override Fan Tach value  ; 7Eh - 7Fh
+		    , 1,        // Reserved                             ; 80h.0
+		KBID, 1,        // 0=EN KBD, 1=JP KBD                   ; 80h.1
+		    , 6,        // Reserved                             ; 80h.2-7
+		NPST, 8,        // Number of P-State level              ; 81h
+		MPST, 8,        // Maxumum P-State                      ; 82h
+		KWAK, 1,        // Keyboard WAKE(0=Disable,1=Enable)    ; 83h.0
+		TWAK, 1,        // TouchPad WAKE(0=Disable,1=Enable)    ; 83h.1
+		    , 1,        // Reserved                             ; 83h.2
+		LWAK, 1,        // LAN Wake Enable (0=Disable, 1=Enable); 83h.3
+		RWAK, 1,        // RTC Wake Enable(0=DIsable,1=Enable)  ; 83h.4
+		    , 3,        // Reserved                             ; 83h.5-7
+		KBEV, 1,        // Keyboard Wake Event                  ; 84h.0
+		TPEV, 1,        // TouchPad Wake Event                  ; 84h.1
+		LDEV, 1,        // Lid Wake Event                       ; 84h.2
+		    , 4,        // Reserved                             ; 84h.3-6
+		PBEV, 1,        // Power Button Wake Event              ; 84h.7
+
+		ECCD, 8,        // EC Code State                        ; 85h
+		ROFW, 8,        // RO FW Reason ID                      ; 86h
+
+		Offset(0xBA),
+		FWVR, 48,       // EC Firmware Version                  ; BAh-BFh
+
+		Offset(0xC0),
+		SMPR, 8,        // SMBus protocol register              ; C0h
+		SMST, 8,        // SMBus status register                ; C1h
+		SMAD, 8,        // SMBus address register               ; C2h
+		SMCM, 8,        // SMBus command register               ; C3h
+		SMD0, 0x100,    // SMBus data regs (32)                 ; C4h - E3h
+		BCNT, 8,        // SMBus Block Count                    ; E4h
+	}
+
+	Method (_CRS, 0, NotSerialized)
+	{
+		Name (ECMD, ResourceTemplate()
+		{
+			IO (Decode16, 0x62, 0x62, 0, 1)
+			IO (Decode16, 0x66, 0x66, 0, 1)
+		})
+		Return (ECMD)
+	}
+
+	Method(_STA)
+	{
+		Return(0x0F)
+	}
+
+
+	Method (_REG, 2, NotSerialized)
+	{
+		// Initialize AC power state
+		Store (ADPT, \PWRS)
+
+		// Initialize LID switch state
+		Store (LIDF, \LIDS)
+
+		// Force a read of CPU temperature
+		Store (CTMP, Local0)
+
+		// Find and program number of P-States
+		Store (SizeOf (\_PR.CPU0._PSS), MPST)
+		Store ("Programming number of P-states: ", Debug)
+		Store (MPST, Debug)
+
+		// Find and program the current P-State
+		Store(\_PR.CPU0._PPC, NPST)
+		Store ("Programming Current P-state: ", Debug)
+		Store (NPST, Debug)
+	}
+
+/*
+ * EC Query Responses
+ *
+ * Lid Status Change         06h
+ * Wifi Button Event (F12)   07h
+ * TZ Event Update CPU Temp  08h
+ * CPU P-State Down          0Eh
+ * CPU P-State UP            0Fh
+
+ * AC plug in                10h
+ * AC removed                11h
+ * Battery Plugged in        12h
+ * Battery Removed           13h
+ * Battery State Change      14h
+ */
+
+	// Wifi Button Event
+	Method (_Q07)
+	{
+		Store ("Wifi Button Event 0x07", Debug)
+	}
+
+	// Thermal Event
+	Method (_Q08)
+	{
+		Store ("Thermal Event 0x08", Debug)
+		Notify(\_TZ.THRM, 0x80)
+	}
+
+	// Pstate Down
+	Method (_Q0E)
+	{
+		Store ("Pstate Event 0x0E", Debug)
+
+		Store(\_PR.CPU0._PPC, Local0)
+		Subtract(PPCM, 0x01, Local1)
+
+		If(LLess(Local0, Local1)) {
+			Increment(Local0)
+			\PPCN ()
+		}
+
+		Store(Local0, NPST)
+	}
+
+	// Pstate Up
+	Method (_Q0F)
+	{
+		Store ("Pstate Event 0x0F", Debug)
+		Store(\_PR.CPU0._PPC, Local0)
+
+		If(Local0) {
+			Decrement(Local0)
+			\PPCN ()
+		}
+
+		Store(Local0, NPST)
+	}
+
+	// AC Power Connected
+	Method (_Q10, 0, NotSerialized)
+	{
+		Store ("AC Insertion Event 0x10", Debug)
+		Store (One, \PWRS)
+		Notify (AC, 0x80)
+		Notify (BATX, 0x80)
+		\PNOT ()
+	}
+
+	// AC Power Removed
+	Method (_Q11, 0, NotSerialized)
+	{
+		Store ("AC Detach Event 0x11", Debug)
+		Store (Zero, \PWRS)
+		Notify (AC, 0x80)
+		Notify (BATX, 0x80)
+		\PNOT ()
+	}
+
+	// Battery State Change - Attach Event
+	Method (_Q12, 0, NotSerialized)
+	{
+		Store ("Battery Insertion Event 0x12", Debug)
+
+		Notify (BATX, 0x81)
+		Notify (BATX, 0x80)
+		\PNOT ()
+	}
+
+	// Battery State Change - Detach Event
+	Method (_Q13, 0, NotSerialized)
+	{
+		Store ("Battery Detach Event 0x13", Debug)
+
+		Notify (BATX, 0x81)
+		Notify (BATX, 0x80)
+		\PNOT ()
+	}
+
+
+	// Battery State Change Event
+	Method (_Q14, 0, NotSerialized)
+	{
+		Store ("Battery State Change Event 0x14", Debug)
+
+		Notify (BATX, 0x80)
+	}
+
+	// Lid Switch Event
+	Method (_Q06)
+	{
+		Store ("Lid Switch Event 0x06", Debug)
+		sleep(20)
+		Store (LIDF, \LIDS)
+		Notify (\_SB.LID0, 0x80)
+	}
+
+	#include "ac.asl"
+	#include "battery.asl"
+}
diff --git a/src/ec/quanta/ene_kb3940q/acpi/superio.asl b/src/ec/quanta/ene_kb3940q/acpi/superio.asl
new file mode 100644
index 0000000000..db4b4128f1
--- /dev/null
+++ b/src/ec/quanta/ene_kb3940q/acpi/superio.asl
@@ -0,0 +1,57 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2012 The ChromiumOS Authors.  All rights reserved.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+// Scope is \_SB.PCI0.LPCB
+
+Device (SIO) {
+	Name (_UID, 0)
+	Name (_ADR, 0)
+
+
+#ifdef SIO_EC_ENABLE_PS2K
+	Device (PS2K)		// Keyboard
+	{
+		Name (_UID, 0)
+		Name (_ADR, 0)
+		Name (_HID, EISAID("PNP0303"))
+		Name (_CID, EISAID("PNP030B"))
+
+		Method (_STA, 0, NotSerialized) {
+			Return (0x0F)
+		}
+
+		Name (_CRS, ResourceTemplate()
+		{
+			FixedIO (0x60, 0x01)
+			FixedIO (0x64, 0x01)
+			IRQNoFlags () {1}
+		})
+
+		Name (_PRS, ResourceTemplate()
+		{
+			StartDependentFn (0, 0) {
+				FixedIO (0x60, 0x01)
+				FixedIO (0x64, 0x01)
+				IRQNoFlags () {1}
+			}
+			EndDependentFn ()
+		})
+	}
+#endif
+}
diff --git a/src/ec/quanta/ene_kb3940q/chip.h b/src/ec/quanta/ene_kb3940q/chip.h
new file mode 100644
index 0000000000..ce95c1c27e
--- /dev/null
+++ b/src/ec/quanta/ene_kb3940q/chip.h
@@ -0,0 +1,35 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2012 The Chromium OS Authors. All rights reserved.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#ifndef _EC_QUANTA_ENE_KB3940Q_CHIP_H
+#define _EC_QUANTA_ENE_KB3940Q_CHIP_H
+
+#include <device/device.h>
+#include <pc80/keyboard.h>
+
+struct chip_operations;
+extern struct chip_operations ec_quanta_ene_kb3940q_ops;
+
+struct ec_quanta_ene_kb3940q_config {
+	struct pc_keyboard keyboard;
+};
+
+#endif /* _EC_QUANTA_ENE_KB3940Q_CHIP_H */
diff --git a/src/ec/quanta/ene_kb3940q/ec.c b/src/ec/quanta/ene_kb3940q/ec.c
new file mode 100644
index 0000000000..1ef971244f
--- /dev/null
+++ b/src/ec/quanta/ene_kb3940q/ec.c
@@ -0,0 +1,188 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2012 The Chromium OS Authors. All rights reserved.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#ifndef __PRE_RAM__
+
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pnp.h>
+#include <stdlib.h>
+#include <arch/io.h>
+#include <delay.h>
+#include <elog.h>
+#include "ec.h"
+#include "chip.h"
+
+/* kbc helper functions from drivers/pc80/keyboard.c */
+static int ec_input_buffer_empty(u8 status_port)
+{
+	u32 timeout;
+	for(timeout = KBC_TIMEOUT_IN_MS; timeout && (inb(status_port) & KBD_IBF);
+	    timeout--) {
+		mdelay(1);
+	}
+
+	if (!timeout) {
+		printk(BIOS_WARNING, "Unexpected EC/KBD input buffer full\n");
+	}
+	return !!timeout;
+}
+
+
+static int ec_output_buffer_full(u8 status_port)
+{
+	u32 timeout;
+	for(timeout = KBC_TIMEOUT_IN_MS; timeout && ((inb(status_port)
+	    & KBD_OBF) == 0); timeout--) {
+		mdelay(1);
+	}
+
+	if (!timeout) {
+		printk(BIOS_INFO, "EC/KBD output buffer result timeout\n");
+	}
+	return !!timeout;
+}
+
+
+
+/* The ENE 60/64 EC registers are the same command/status IB/OB KBC pair.
+ * Check status from 64 port before each command.
+ *
+ *  Ex. Get panel ID command C43/D77
+ *  Check IBF empty. Then Write 0x43(CMD) to 0x64 Port
+ *  Check IBF empty. Then Write 0x77(DATA) to 0x60 Port
+ *  Check OBF set. Then Get Data(0x03:panel ID) from 0x60
+ * Different commands return may or may not respond and may have multiple
+ * bytes. Keep it simple for now
+ */
+
+u8 ec_kbc_read_ob(void)
+{
+	if (!ec_output_buffer_full(KBD_STATUS)) return 0;
+	return inb(KBD_DATA);
+}
+
+void ec_kbc_write_cmd(u8 cmd)
+{
+	if (!ec_input_buffer_empty(KBD_STATUS)) return;
+	outb(cmd, KBD_COMMAND);
+}
+
+void ec_kbc_write_ib(u8 data)
+{
+	if (!ec_input_buffer_empty(KBD_STATUS)) return;
+	outb(data, KBD_DATA);
+}
+
+/* EC Host Control Protocol routines */
+u8 ec_read_ob(void)
+{
+	if (!ec_output_buffer_full(EC_SC)) return 0;
+	return inb(EC_DATA);
+}
+
+void ec_write_cmd(u8 cmd)
+{
+	if (!ec_input_buffer_empty(EC_SC)) return;
+	outb(cmd, EC_COMMAND);
+}
+
+void ec_write_ib(u8 data)
+{
+	if (!ec_input_buffer_empty(EC_SC)) return;
+	outb(data, EC_DATA);
+}
+
+/*
+ * These functions are for accessing the ENE932 device RAM space
+ */
+u8 ec_mem_read(u8 addr)
+{
+	ec_write_cmd(EC_CMD_READ_RAM);
+	ec_write_ib(addr);
+	return ec_read_ob();
+}
+
+void ec_mem_write(u8 addr, u8 data)
+{
+	ec_write_cmd(EC_CMD_WRITE_RAM);
+	ec_write_ib(addr);
+	ec_write_ib(data);
+	return;
+}
+
+#ifndef __SMM__
+static void ene_kb3940q_log_events(void)
+{
+#if CONFIG_ELOG
+	u8 reason = ec_mem_read(EC_SHUTDOWN_REASON);
+	if (reason)
+		elog_add_event_byte(ELOG_TYPE_EC_SHUTDOWN, reason);
+#endif
+}
+
+static void ene_kb3940q_init(device_t dev)
+{
+	struct ec_quanta_ene_kb3940q_config *conf = dev->chip_info;
+
+	if (!dev->enabled)
+		return;
+
+	printk(BIOS_DEBUG, "Quanta EnE KB3940Q: Initializing keyboard.\n");
+	pc_keyboard_init(&conf->keyboard);
+
+	ene_kb3940q_log_events();
+}
+
+
+static void ene_kb3940q_read_resources(device_t dev)
+{
+	/* This function avoids an error on serial console. */
+}
+
+
+static void ene_kb3940q_enable_resources(device_t dev)
+{
+	/* This function avoids an error on serial console. */
+}
+
+static struct device_operations ops = {
+	.init             = ene_kb3940q_init,
+	.read_resources   = ene_kb3940q_read_resources,
+	.enable_resources = ene_kb3940q_enable_resources
+};
+
+static struct pnp_info pnp_dev_info[] = {
+        { &ops, 0, 0, { 0, 0 }, }
+};
+
+static void enable_dev(device_t dev)
+{
+	pnp_enable_devices(dev, &pnp_ops, ARRAY_SIZE(pnp_dev_info),
+			   pnp_dev_info);
+}
+
+struct chip_operations ec_quanta_ene_kb3940q_ops = {
+	CHIP_NAME("QUANTA EnE KB3940Q EC")
+	.enable_dev = enable_dev
+};
+#endif /* ! __SMM__ */
+#endif /* ! __PRE_RAM__ */
diff --git a/src/ec/quanta/ene_kb3940q/ec.h b/src/ec/quanta/ene_kb3940q/ec.h
new file mode 100644
index 0000000000..ab01b2914c
--- /dev/null
+++ b/src/ec/quanta/ene_kb3940q/ec.h
@@ -0,0 +1,213 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2012 The Chromium OS Authors. All rights reserved.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/*
+ * EC communication interface for QUANTA EnE KB3940Q Embedded Controller.
+ */
+
+#ifndef _EC_QUANTA_ENE_KB3940Q_EC_H
+#define _EC_QUANTA_ENE_KB3940Q_EC_H
+
+#define EC_IO 0x380 /* Mainboard specific. Could be Kconfig option */
+#define EC_IO_HIGH EC_IO + 1
+#define EC_IO_LOW  EC_IO + 2
+#define EC_IO_DATA EC_IO + 3
+
+
+
+// 60h/64h Command Interface
+#define KBD_DATA	0x60
+#define KBD_COMMAND	0x64
+#define KBD_STATUS	0x64
+#define   KBD_IBF	(1 << 1) // 1: input buffer full (data ready for ec)
+#define   KBD_OBF	(1 << 0) // 1: output buffer full (data ready for host)
+
+// 62h/66h Command Interface
+#define EC_DATA	0x62
+#define EC_COMMAND	0x66
+#define EC_SC	0x66
+
+/* Wait 400ms for keyboard controller answers */
+#define KBC_TIMEOUT_IN_MS 400
+
+u8 ec_kbc_read_ob(void);
+void ec_kbc_write_cmd(u8 cmd);
+void ec_kbc_write_ib(u8 data);
+u8 ec_read_ob(void);
+void ec_write_cmd(u8 cmd);
+void ec_write_ib(u8 data);
+
+u8 ec_mem_read(u8 addr);
+void ec_mem_write(u8 addr, u8 data);
+
+/*****************************************************************************
+ * EC Internal memory
+ */
+
+#define EC_BAT_DCAP_LO			0x40
+#define EC_BAT_DCAP_HI			0x41
+#define EC_BAT_DVOLT_LO			0x42
+#define EC_BAT_DVOLT_HI			0x43
+#define EC_BAT_FULL_CAP_LO		0x44
+#define EC_BAT_FULL_CAP_HI		0x45
+#define EC_BAT_RATE_LO			0x46
+#define EC_BAT_RATE_HI			0x47
+#define EC_BAT_RMC_LO			0x48
+#define EC_BAT_RMC_HI			0x49
+#define EC_BAT_VOLT_LO			0x4A
+#define EC_BAT_VOLT_HI			0x4B
+#define EC_BAT_CHRG_CURT_LO		0x4C
+#define EC_BAT_CHRG_CURT_HI		0x4D
+#define EC_BAT_CHRG_VOLT_LO		0x4E
+#define EC_BAT_CHRG_VOLT_HI		0x4F
+#define EC_BAT_TEMP_LO			0x50
+#define EC_BAT_TEMP_HI			0x51
+#define EC_BAT_SN_LO			0x52
+#define EC_BAT_SN_HI			0x53
+#define EC_BAT_RSOC_LO			0x54
+#define EC_BAT_RSOC_HI			0x55
+#define EC_BAT_STATUS_LO		0x56
+#define EC_BAT_STATUS_HI		0x57
+#define EC_BAT_CYCLE_COUNT_LO	0x58
+#define EC_BAT_CYCLE_COUNT_HI	0x59
+#define EC_BAT_MFG_DATE_LO		0x5A
+#define EC_BAT_MFG_DATE_HI		0x5B
+#define EC_BAT_CHEMISTRY0		0x60
+#define EC_BAT_CHEMISTRY1		0x61
+#define EC_BAT_CHEMISTRY2		0x62
+#define EC_BAT_CHEMISTRY3		0x63
+#define EC_BAT_DEVICE_NAME0		0x64
+#define EC_BAT_DEVICE_NAME1		0x65
+#define EC_BAT_DEVICE_NAME2		0x66
+#define EC_BAT_DEVICE_NAME3		0x67
+#define EC_BAT_DEVICE_NAME4		0x68
+#define EC_BAT_DEVICE_NAME5		0x69
+#define EC_BAT_DEVICE_NAME6		0x6A
+
+#define EC_POWER_FLAG			0x70
+#define   EC_PF_ADAPTER_IN		(1 << 0)
+#define   EC_PF_ADAPTER_PIN		(1 << 1)
+#define   EC_PF_BATT_IN			(1 << 2)
+#define   EC_PF_BATT_DESTROY	(1 << 3)
+#define   EC_PF_ACPI_MODE		(1 << 4)
+#define   EC_PF_X86_BIOS		(1 << 6)
+#define   EC_PF_COREBOOT		0
+#define   EC_PF_PASSIVE_THERM	(1 << 7)
+
+#define EC_CHARGER_STATUS		0x71
+#define   EC_CHS_BAT_DISCHARGING	(1 << 0)
+#define   EC_CHS_BAT_CHARGING		(1 << 1)
+#define   EC_CHS_BAT_CRITICAL		(1 << 2)
+
+#define EC_HW_GPI_STATUS			0x72
+#define   EC_GPI_LID_STAT_BIT		0
+#define   EC_GPI_RECOVERY_MODE_BIT	1
+#define   EC_GPI_LID_OPEN			(1 << EC_GPI_LID_STAT_BIT)
+#define   EC_GPI_RECOVERY_STATUS	(1 << EC_GPI_RECOVERY_MODE_BIT)
+
+#define EC_GPIO_STATUS				0x73
+#define   EC_GPIO_TP_LED_ENABLE		(1 << 0)
+#define   EC_GPIO_TP_LED_STATUS		(1 << 1)
+
+#define EC_CPU_TMP					0x78
+#define EC_GPU_TMP					0x79
+#define EC_LOCAL_TMP1 				0x7A
+#define EC_LOCAL_TMP2 				0x7B
+#define EC_FAN_TACH_LO  			0x7C
+#define EC_FAN_TACH_HI  			0x7D
+#define EC_FAN_DBG_RPM_LO			0x7E
+#define EC_FAN_DBG_RPM_HI			0x7F
+
+#define EC_KBID_REG			0x80
+#define   EC_KBD_EN			0
+#define   EC_KBD_JP			(1 << 1)
+#define EC_CURR_PS			0x81
+#define EC_MAX_PS			0x82
+
+#define EC_EC_PSW			0x83
+#define   EC_PSW_IKB		(1 << 0)
+#define   EC_PSW_TP			(1 << 1)
+#define   EC_PSW_LAN		(1 << 3)
+#define   EC_PSW_RTC		(1 << 4)
+#define   EC_PSW_USB		(1 << 5)
+
+#define EC_WAKE_EVEN_TID	0x84
+#define   EC_WID_IKB		(1 << 0)
+#define   EC_WID_TP			(1 << 1)
+#define   EC_WID_LID		(1 << 2)
+#define   EC_WID_PWRSW		(1 << 7)
+
+#define EC_CODE_STATE				0x85
+#define   EC_COS_INITIAL_STAGE		0xBB
+#define   EC_COS_EC_RO				0xC0
+#define   EC_COS_EC_RW				0xC1
+
+#define EC_FW_REASON_ID				0x86
+#define   EC_FWR_NOT_RO				0x00
+#define   EC_FWR_GPI_ASSERTED		0x01
+#define   EC_FWR_HOTKEY_PRESSED		0x02
+#define   EC_FWR_FIRMWARE_CORRUPT	0x03
+
+#define EC_SHUTDOWN_REASON		0xB9
+#define EC_FW_VER0			0xBA
+#define EC_FW_VER1			0xBB
+#define EC_FW_VER2			0xBC
+#define EC_FW_VER3			0xBD
+#define EC_FW_VER4			0xBE
+#define EC_FW_VER5			0xBF
+#define EC_SMBPTCL			0xC0
+#define EC_SMBSTA			0xC1
+#define EC_SMBADDR			0xC2
+#define EC_SMBCMD			0xC3
+#define EC_SMBDATA			0xC4
+#define EC_SMBBCNT			0xE4
+
+/*****************************************************************************
+ * SMI / SCI event status
+ */
+#define Q_EVENT_LID_STATUS			0x06
+#define Q_EVENT_WIFI_BUTTON			0x06
+#define Q_EVENT_THERM_EVENT			0x08
+#define Q_EVENT_PSTATE_DOWN			0x0E
+#define Q_EVENT_PSTATE_UP			0x0F
+#define Q_EVENT_AC_PLUGGED			0x10
+#define Q_EVENT_AC_UNPLUGGED		0x11
+#define Q_EVENT_BATTERY_PLUGGED		0x12
+#define Q_EVENT_BATTERY_UNPLUGGED	0x13
+#define Q_EVENT_BATTERY_STATUS		0x14
+
+/*****************************************************************************
+ * EC Commands
+ */
+#define EC_CMD_ENABLE_ACPI_MODE		0x71
+#define EC_CMD_DISABLE_ACPI_MODE	0x72
+#define EC_CMD_DISABLE_SMBUS_EVENT	0x73
+#define EC_CMD_ENABLE_SMBUS_EVENT	0x74
+#define EC_CMD_SYSTEM_RESET			0x78
+#define EC_CMD_SYSTEM_SHUTDOWN		0x79
+#define EC_CMD_RESET_FOR_FW_UPDATE	0x7D
+#define EC_CMD_IDLE_FOR SPI_UPDATE	0x7E
+#define EC_CMD_READ_RAM				0x80
+#define EC_CMD_WRITE_RAM			0x81
+#define EC_CMD_BURST_ENABLE			0x82
+#define EC_CMD_BURST_DISABLE		0x83
+#define EC_CMD_QUERY_EVENT			0x84
+
+
+#endif /* _EC_QUANTA_ENE_KB3940Q_EC_H */