mainboard/lenovo: Add Lenovo Thinkpad T520 support

Short list of known issues for this patchset:

* Suspend/Resume - does not work
* Combi pci card for SD/MMC card reader with IEEE1394 - not found
* Shutdown - sometimes does not work as expected
* At least mysterious harddrive i/o

Change-Id: Iaba8d1f5e471cfeca20d82f4e1b416641e1f2ae9
Signed-off-by: Philipp Deppenwiese <zaolin@das-labor.org>
Reviewed-on: http://review.coreboot.org/5672
Tested-by: build bot (Jenkins)
Reviewed-by: Idwer Vollering <vidwer@gmail.com>

22 files changed, 2225 insertions, 0 deletions

diff --git a/src/mainboard/lenovo/Kconfig b/src/mainboard/lenovo/Kconfig
index 9410e90130..c1dec85975 100644
--- a/src/mainboard/lenovo/Kconfig
+++ b/src/mainboard/lenovo/Kconfig
@@ -22,6 +22,11 @@ config BOARD_LENOVO_X230
 	help
 	  Lenovo X230 laptop. Consult wiki for details.
 
+config BOARD_LENOVO_T520
+	bool "ThinkPad T520"
+	help
+	  Lenovo T520 laptop. Consult wiki for details.
+
 config BOARD_LENOVO_T530
 	bool "ThinkPad T530"
 	help
@@ -40,6 +45,7 @@ endchoice
 source "src/mainboard/lenovo/x60/Kconfig"
 source "src/mainboard/lenovo/x201/Kconfig"
 source "src/mainboard/lenovo/x230/Kconfig"
+source "src/mainboard/lenovo/t520/Kconfig"
 source "src/mainboard/lenovo/t530/Kconfig"
 source "src/mainboard/lenovo/t60/Kconfig"
 
diff --git a/src/mainboard/lenovo/t520/Kconfig b/src/mainboard/lenovo/t520/Kconfig
new file mode 100644
index 0000000000..196d73d343
--- /dev/null
+++ b/src/mainboard/lenovo/t520/Kconfig
@@ -0,0 +1,83 @@
+if BOARD_LENOVO_T520
+
+config BOARD_SPECIFIC_OPTIONS # dummy
+	def_bool y
+	select ARCH_X86
+	select CPU_INTEL_SOCKET_RPGA988B
+	select NORTHBRIDGE_INTEL_SANDYBRIDGE
+	select SOUTHBRIDGE_INTEL_BD82X6X
+	select EC_LENOVO_PMH7
+	select EC_LENOVO_H8
+	select BOARD_ROMSIZE_KB_8192
+	select HAVE_ACPI_TABLES
+	select HAVE_OPTION_TABLE
+	select HAVE_CMOS_DEFAULT
+	select HAVE_ACPI_RESUME
+	select HAVE_SMI_HANDLER
+	select GFXUMA
+	select EARLY_CBMEM_INIT
+
+	# Workaround for EC/KBC IRQ1.
+	select SERIRQ_CONTINUOUS_MODE
+
+config HAVE_MRC_CACHE
+	bool
+	default n
+
+config HAVE_IFD_BIN
+	bool
+	default n
+
+config HAVE_ME_BIN
+	bool
+	default n
+
+config MAINBOARD_DIR
+	string
+	default lenovo/t520
+
+config MAINBOARD_PART_NUMBER
+	string
+	default "XXXXXXX"
+
+config MMCONF_BASE_ADDRESS
+	hex
+	default 0xf0000000
+
+config CACHE_ROM_SIZE_OVERRIDE
+	hex
+	default 0x800000
+
+config IRQ_SLOT_COUNT
+	int
+	default 18
+
+config MAX_CPUS
+	int
+	default 8
+
+config USBDEBUG_HCD_INDEX
+	int
+	default 2
+
+config DRAM_GATE_GPIO
+	int
+	default 10
+
+config VGA_BIOS_FILE
+	string
+	default "pci8086,0126.rom"
+
+config MAINBOARD_PCI_SUBSYSTEM_VENDOR_ID
+	hex
+	default 0x17aa
+
+config MAINBOARD_PCI_SUBSYSTEM_DEVICE_ID
+	hex
+	default 0x21cf
+
+config MAINBOARD_VENDOR
+	string
+	default "LENOVO"
+
+endif # BOARD_LENOVO_T520
diff --git a/src/mainboard/lenovo/t520/Makefile.inc b/src/mainboard/lenovo/t520/Makefile.inc
new file mode 100644
index 0000000000..d514d4b9f9
--- /dev/null
+++ b/src/mainboard/lenovo/t520/Makefile.inc
@@ -0,0 +1,20 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2011 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
+##
+
+smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c
diff --git a/src/mainboard/lenovo/t520/acpi/ec.asl b/src/mainboard/lenovo/t520/acpi/ec.asl
new file mode 100644
index 0000000000..4b3e72cb03
--- /dev/null
+++ b/src/mainboard/lenovo/t520/acpi/ec.asl
@@ -0,0 +1,26 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (c) 2011 Sven Schnelle <svens@stackframe.org>
+ *
+ * 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
+ */
+
+#include <ec/lenovo/h8/acpi/ec.asl>
+
+Scope(\_SB.PCI0.LPCB.EC)
+{
+}
diff --git a/src/mainboard/lenovo/t520/acpi/gpe.asl b/src/mainboard/lenovo/t520/acpi/gpe.asl
new file mode 100644
index 0000000000..eb489d5c4e
--- /dev/null
+++ b/src/mainboard/lenovo/t520/acpi/gpe.asl
@@ -0,0 +1,13 @@
+	Method (_L01, 0, NotSerialized)
+	{
+		If (\_SB.PCI0.RP03.HPCS)
+		{
+			Sleep (100)
+			Store (0x01, \_SB.PCI0.RP03.HPCS)
+			If (\_SB.PCI0.RP03.PDC)
+			{
+				Store (0x01, \_SB.PCI0.RP03.PDC)
+				Notify (\_SB.PCI0.RP03, 0x00)
+			}
+		}
+	}
diff --git a/src/mainboard/lenovo/t520/acpi/platform.asl b/src/mainboard/lenovo/t520/acpi/platform.asl
new file mode 100644
index 0000000000..73478eae7d
--- /dev/null
+++ b/src/mainboard/lenovo/t520/acpi/platform.asl
@@ -0,0 +1,74 @@
+/*
+ * 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 APM port can be used for generating software SMIs */
+
+OperationRegion (APMP, SystemIO, 0xb2, 2)
+Field (APMP, ByteAcc, NoLock, Preserve)
+{
+	APMC, 8,	// APM command
+	APMS, 8		// APM status
+}
+
+/* Port 80 POST */
+
+OperationRegion (POST, SystemIO, 0x80, 1)
+Field (POST, ByteAcc, Lock, Preserve)
+{
+	DBG0, 8
+}
+
+/* SMI I/O Trap */
+Method(TRAP, 1, Serialized)
+{
+	Store (Arg0, SMIF)	// SMI Function
+	Store (0, TRP0)		// Generate trap
+	Return (SMIF)		// Return value of SMI handler
+}
+
+/* The _PIC method is called by the OS to choose between interrupt
+ * routing via the i8259 interrupt controller or the APIC.
+ *
+ * _PIC is called with a parameter of 0 for i8259 configuration and
+ * with a parameter of 1 for Local Apic/IOAPIC configuration.
+ */
+
+Method(_PIC, 1)
+{
+	// Remember the OS' IRQ routing choice.
+	Store(Arg0, PICM)
+}
+
+/* The _PTS method (Prepare To Sleep) is called before the OS is
+ * entering a sleep state. The sleep state number is passed in Arg0
+ */
+
+Method(_PTS,1)
+{
+
+}
+
+/* The _WAK method is called on system wakeup */
+
+Method(_WAK,1)
+{
+	/* Not implemented.  */
+	Return(Package(){0,0})
+}
+
diff --git a/src/mainboard/lenovo/t520/acpi/sandybridge_pci_irqs.asl b/src/mainboard/lenovo/t520/acpi/sandybridge_pci_irqs.asl
new file mode 100644
index 0000000000..ba725ac1db
--- /dev/null
+++ b/src/mainboard/lenovo/t520/acpi/sandybridge_pci_irqs.asl
@@ -0,0 +1,65 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ *
+ * 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
+ */
+
+/* This is board specific information: IRQ routing for Sandybridge */
+
+// PCI Interrupt Routing
+Method(_PRT)
+{
+	If (PICM) {
+		Return (Package() {
+			// Onboard graphics (IGD)	0:2.0
+			Package() { 0x0002ffff, 0, 0, 16 },//              GFX    INTA -> PIRQA (MSI)
+			// High Definition Audio	0:1b.0
+			Package() { 0x001bffff, 0, 0, 16 },//  D27IP_ZIP   HDA    INTA -> PIRQA (MSI)
+			// PCIe Root Ports		0:1c.x
+			Package() { 0x001cffff, 0, 0, 17 },//  D28IP_P1IP  WLAN   INTA -> PIRQB
+			Package() { 0x001cffff, 1, 0, 21 },//  D28IP_P2IP  ETH0   INTB -> PIRQF
+			Package() { 0x001cffff, 2, 0, 19 },//  D28IP_P3IP  SDCARD INTC -> PIRQD
+			// EHCI	#1			0:1d.0
+			Package() { 0x001dffff, 0, 0, 19 },//  D29IP_E1P   EHCI1  INTA -> PIRQD
+			// EHCI	#2			0:1a.0
+			Package() { 0x001affff, 0, 0, 21 },//  D26IP_E2P   EHCI2  INTA -> PIRQF
+			// LPC devices			0:1f.0
+			Package() { 0x001fffff, 0, 0, 17 }, // D31IP_SIP   SATA   INTA -> PIRQB (MSI)
+			Package() { 0x001fffff, 1, 0, 23 }, // D31IP_SMIP  SMBUS  INTB -> PIRQH
+			Package() { 0x001fffff, 2, 0, 16 }, // D31IP_TTIP  THRT   INTC -> PIRQA
+		})
+	} Else {
+		Return (Package() {
+			// Onboard graphics (IGD)	0:2.0
+			Package() { 0x0002ffff, 0, \_SB.PCI0.LPCB.LNKA, 0 },
+			// High Definition Audio	0:1b.0
+			Package() { 0x001bffff, 0, \_SB.PCI0.LPCB.LNKA, 0 },
+			// PCIe Root Ports		0:1c.x
+			Package() { 0x001cffff, 0, \_SB.PCI0.LPCB.LNKB, 0 },
+			Package() { 0x001cffff, 1, \_SB.PCI0.LPCB.LNKF, 0 },
+			Package() { 0x001cffff, 2, \_SB.PCI0.LPCB.LNKD, 0 },
+			// EHCI	#1			0:1d.0
+			Package() { 0x001dffff, 0, \_SB.PCI0.LPCB.LNKD, 0 },
+			// EHCI	#2			0:1a.0
+			Package() { 0x001affff, 0, \_SB.PCI0.LPCB.LNKF, 0 },
+			// LPC device			0:1f.0
+			Package() { 0x001fffff, 0, \_SB.PCI0.LPCB.LNKB, 0 },
+			Package() { 0x001fffff, 1, \_SB.PCI0.LPCB.LNKH, 0 },
+			Package() { 0x001fffff, 2, \_SB.PCI0.LPCB.LNKA, 0 },
+		})
+	}
+}
+
diff --git a/src/mainboard/lenovo/t520/acpi/superio.asl b/src/mainboard/lenovo/t520/acpi/superio.asl
new file mode 100644
index 0000000000..a2657f1eff
--- /dev/null
+++ b/src/mainboard/lenovo/t520/acpi/superio.asl
@@ -0,0 +1 @@
+#include "../../../../drivers/pc80/ps2_controller.asl"
diff --git a/src/mainboard/lenovo/t520/acpi/video.asl b/src/mainboard/lenovo/t520/acpi/video.asl
new file mode 100644
index 0000000000..12a268b39d
--- /dev/null
+++ b/src/mainboard/lenovo/t520/acpi/video.asl
@@ -0,0 +1,115 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (c) 2011 Sven Schnelle <svens@stackframe.org>
+ * Copyright (c) 2013 Vladimir Serbinenko
+ *
+ * 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
+ */
+
+#include "smi.h"
+
+Scope (\_SB.PCI0.GFX0)
+{
+	Device (LCD0)
+	{
+		Name (_ADR, 0x0400)
+		Name (BRCT, 0)
+
+		Name (BRIG, Package (0x12)
+		{
+			0x61,
+			0x61,
+			0x2,
+			0x4,
+			0x5,
+			0x7,
+			0x9,
+			0xb,
+			0xd,
+			0x11,
+			0x14,
+			0x17,
+			0x1c,
+			0x20,
+			0x27,
+			0x31,
+			0x41,
+			0x61,
+		})
+
+		Method (_BCL, 0, NotSerialized)
+		{
+			Store (1, BRCT)
+			Return (BRIG)
+		}
+
+		Method (_BCM, 1, NotSerialized)
+		{
+			Store (ShiftLeft (Arg0, 4), ^^BCLV)
+			Store (0x80000000, ^^CR1)
+			Store (0x061a061a, ^^CR2)
+		}
+		Method (_BQC, 0, NotSerialized)
+		{
+			Store (^^BCLV, Local0)
+			ShiftRight (Local0, 4, Local0)
+			Return (Local0)
+		}
+
+		Method(BRID, 1, NotSerialized)
+		{
+			Store (Match (BRIG, MEQ, Arg0, MTR, Zero, 2), Local0)
+			If (LEqual (Local0, Ones))
+			{
+				Return (0x11)
+			}
+			Return (Local0)
+		}
+
+		/* Using Notify is the right way. But Windows doesn't handle
+		   it well. So use both method in a way to avoid double action.
+		 */
+		Method (DECB, 0, NotSerialized)
+		{
+			If (BRCT)
+			{
+				Notify (LCD0, 0x87)
+			} Else {
+				Store (BRID (_BQC ()), Local0)
+				If (LNotEqual (Local0, 2))
+				{
+					Decrement (Local0)
+				}
+				_BCM (DerefOf (Index (BRIG, Local0)))
+			}
+		}
+		Method (INCB, 0, NotSerialized)
+		{
+			If (BRCT)
+			{
+				Notify (LCD0, 0x86)
+			} Else {
+				Store (BRID (_BQC ()), Local0)
+				If (LNotEqual (Local0, 0x11))
+				{
+					Increment (Local0)
+				}
+				_BCM (DerefOf (Index (BRIG, Local0)))
+			}
+		}
+	}
+}
diff --git a/src/mainboard/lenovo/t520/acpi_tables.c b/src/mainboard/lenovo/t520/acpi_tables.c
new file mode 100644
index 0000000000..6ee2df858a
--- /dev/null
+++ b/src/mainboard/lenovo/t520/acpi_tables.c
@@ -0,0 +1,256 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ *
+ * 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
+ */
+
+#include <types.h>
+#include <string.h>
+#include <cbmem.h>
+#include <console/console.h>
+#include <arch/acpi.h>
+#include <arch/ioapic.h>
+#include <arch/acpigen.h>
+#include <arch/smp/mpspec.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <cpu/cpu.h>
+#include <cpu/x86/msr.h>
+
+extern const unsigned char AmlCode[];
+#if CONFIG_HAVE_ACPI_SLIC
+unsigned long acpi_create_slic(unsigned long current);
+#endif
+
+#include <southbridge/intel/bd82x6x/pch.h>
+#include <southbridge/intel/bd82x6x/nvs.h>
+#include "thermal.h"
+
+static void acpi_update_thermal_table(global_nvs_t *gnvs)
+{
+	gnvs->tcrt = CRITICAL_TEMPERATURE;
+	gnvs->tpsv = PASSIVE_TEMPERATURE;
+}
+
+static void acpi_create_gnvs(global_nvs_t *gnvs)
+{
+	memset((void *)gnvs, 0, sizeof(*gnvs));
+	gnvs->apic = 1;
+	gnvs->mpen = 1; /* Enable Multi Processing */
+	gnvs->pcnt = dev_count_cpu();
+
+	/* Disable USB ports in S3 by default */
+	gnvs->s3u0 = 0;
+	gnvs->s3u1 = 0;
+
+	/* Disable USB ports in S5 by default */
+	gnvs->s5u0 = 0;
+	gnvs->s5u1 = 0;
+
+	/* CBMEM TOC */
+	gnvs->cmem = (u32)get_cbmem_toc();
+
+	/* IGD Displays */
+	gnvs->ndid = 3;
+	gnvs->did[0] = 0x80000100;
+	gnvs->did[1] = 0x80000240;
+	gnvs->did[2] = 0x80000410;
+	gnvs->did[3] = 0x80000410;
+	gnvs->did[4] = 0x00000005;
+
+	// the lid is open by default.
+	gnvs->lids = 1;
+
+	acpi_update_thermal_table(gnvs);
+}
+
+unsigned long acpi_fill_madt(unsigned long current)
+{
+	/* Local APICs */
+	current = acpi_create_madt_lapics(current);
+
+	/* IOAPIC */
+	current += acpi_create_madt_ioapic((acpi_madt_ioapic_t *) current,
+				2, IO_APIC_ADDR, 0);
+
+	/* INT_SRC_OVR */
+	current += acpi_create_madt_irqoverride((acpi_madt_irqoverride_t *)
+		 current, 0, 0, 2, 0);
+	current += acpi_create_madt_irqoverride((acpi_madt_irqoverride_t *)
+		 current, 0, 9, 9, MP_IRQ_TRIGGER_LEVEL | MP_IRQ_POLARITY_HIGH);
+
+	return current;
+}
+
+unsigned long acpi_fill_ssdt_generator(unsigned long current,
+					const char *oem_table_id)
+{
+	generate_cpu_entries();
+	return (unsigned long) (acpigen_get_current());
+}
+
+unsigned long acpi_fill_slit(unsigned long current)
+{
+	// Not implemented
+	return current;
+}
+
+unsigned long acpi_fill_srat(unsigned long current)
+{
+	/* No NUMA, no SRAT */
+	return current;
+}
+
+#define ALIGN_CURRENT current = (ALIGN(current, 16))
+unsigned long write_acpi_tables(unsigned long start)
+{
+	unsigned long current;
+	int i;
+	acpi_rsdp_t *rsdp;
+	acpi_rsdt_t *rsdt;
+	acpi_xsdt_t *xsdt;
+	acpi_hpet_t *hpet;
+	acpi_madt_t *madt;
+	acpi_mcfg_t *mcfg;
+	acpi_fadt_t *fadt;
+	acpi_facs_t *facs;
+#if CONFIG_HAVE_ACPI_SLIC
+	acpi_header_t *slic;
+#endif
+	acpi_header_t *ssdt;
+	acpi_header_t *dsdt;
+
+	current = start;
+
+	/* Align ACPI tables to 16byte */
+	ALIGN_CURRENT;
+
+	printk(BIOS_INFO, "ACPI: Writing ACPI tables at %lx.\n", start);
+
+	/* We need at least an RSDP and an RSDT Table */
+	rsdp = (acpi_rsdp_t *) current;
+	current += sizeof(acpi_rsdp_t);
+	ALIGN_CURRENT;
+	rsdt = (acpi_rsdt_t *) current;
+	current += sizeof(acpi_rsdt_t);
+	ALIGN_CURRENT;
+	xsdt = (acpi_xsdt_t *) current;
+	current += sizeof(acpi_xsdt_t);
+	ALIGN_CURRENT;
+
+	/* clear all table memory */
+	memset((void *) start, 0, current - start);
+
+	acpi_write_rsdp(rsdp, rsdt, xsdt);
+	acpi_write_rsdt(rsdt);
+	acpi_write_xsdt(xsdt);
+
+	printk(BIOS_DEBUG, "ACPI:    * FACS\n");
+	facs = (acpi_facs_t *) current;
+	current += sizeof(acpi_facs_t);
+	ALIGN_CURRENT;
+	acpi_create_facs(facs);
+
+	printk(BIOS_DEBUG, "ACPI:    * DSDT\n");
+	dsdt = (acpi_header_t *) current;
+	memcpy(dsdt, &AmlCode, sizeof(acpi_header_t));
+	current += dsdt->length;
+	memcpy(dsdt, &AmlCode, dsdt->length);
+
+	ALIGN_CURRENT;
+
+	printk(BIOS_DEBUG, "ACPI:    * FADT\n");
+	fadt = (acpi_fadt_t *) current;
+	current += sizeof(acpi_fadt_t);
+	ALIGN_CURRENT;
+
+	acpi_create_fadt(fadt, facs, dsdt);
+	acpi_add_table(rsdp, fadt);
+
+	/*
+	 * We explicitly add these tables later on:
+	 */
+	printk(BIOS_DEBUG, "ACPI:    * HPET\n");
+
+	hpet = (acpi_hpet_t *) current;
+	current += sizeof(acpi_hpet_t);
+	ALIGN_CURRENT;
+	acpi_create_hpet(hpet);
+	acpi_add_table(rsdp, hpet);
+
+	/* If we want to use HPET Timers Linux wants an MADT */
+	printk(BIOS_DEBUG, "ACPI:    * MADT\n");
+
+	madt = (acpi_madt_t *) current;
+	acpi_create_madt(madt);
+	current += madt->header.length;
+	ALIGN_CURRENT;
+	acpi_add_table(rsdp, madt);
+
+	printk(BIOS_DEBUG, "ACPI:    * MCFG\n");
+	mcfg = (acpi_mcfg_t *) current;
+	acpi_create_mcfg(mcfg);
+	current += mcfg->header.length;
+	ALIGN_CURRENT;
+	acpi_add_table(rsdp, mcfg);
+
+	/* Pack GNVS into the ACPI table area */
+	for (i=0; i < dsdt->length; i++) {
+		if (*(u32*)(((u32)dsdt) + i) == 0xC0DEBABE) {
+			printk(BIOS_DEBUG, "ACPI: Patching up global NVS in "
+			     "DSDT at offset 0x%04x -> 0x%08lx\n", i, current);
+			*(u32*)(((u32)dsdt) + i) = current; // 0x92 bytes
+			acpi_save_gnvs(current);
+			break;
+		}
+	}
+
+	/* And fill it */
+	acpi_create_gnvs((global_nvs_t *)current);
+
+	/* And tell SMI about it */
+	smm_setup_structures((void *)current, NULL, NULL);
+
+	current += sizeof(global_nvs_t);
+	ALIGN_CURRENT;
+
+	/* We patched up the DSDT, so we need to recalculate the checksum */
+	dsdt->checksum = 0;
+	dsdt->checksum = acpi_checksum((void *)dsdt, dsdt->length);
+
+	printk(BIOS_DEBUG, "ACPI:     * DSDT @ %p Length %x\n", dsdt,
+		     dsdt->length);
+
+#if CONFIG_HAVE_ACPI_SLIC
+	printk(BIOS_DEBUG, "ACPI:     * SLIC\n");
+	slic = (acpi_header_t *)current;
+	current += acpi_create_slic(current);
+	ALIGN_CURRENT;
+	acpi_add_table(rsdp, slic);
+#endif
+
+	printk(BIOS_DEBUG, "ACPI:     * SSDT\n");
+	ssdt = (acpi_header_t *)current;
+	acpi_create_ssdt_generator(ssdt, ACPI_TABLE_CREATOR);
+	current += ssdt->length;
+	acpi_add_table(rsdp, ssdt);
+	ALIGN_CURRENT;
+
+	printk(BIOS_DEBUG, "current = %lx\n", current);
+	printk(BIOS_INFO, "ACPI: done.\n");
+	return current;
+}
diff --git a/src/mainboard/lenovo/t520/board_info.txt b/src/mainboard/lenovo/t520/board_info.txt
new file mode 100644
index 0000000000..8d44122400
--- /dev/null
+++ b/src/mainboard/lenovo/t520/board_info.txt
@@ -0,0 +1,6 @@
+Category: laptop
+Board name: T520
+ROM package: SOIC-8
+ROM protocol: SPI
+ROM socketed: n
+Flashrom support: y
diff --git a/src/mainboard/lenovo/t520/cmos.default b/src/mainboard/lenovo/t520/cmos.default
new file mode 100644
index 0000000000..137f48254b
--- /dev/null
+++ b/src/mainboard/lenovo/t520/cmos.default
@@ -0,0 +1,18 @@
+boot_option=Fallback
+last_boot=Fallback
+baud_rate=115200
+debug_level=Spew
+power_on_after_fail=Enable
+nmi=Enable
+volume=0x3
+first_battery=Primary
+bluetooth=Enable
+wwan=Enable
+wlan=Enable
+touchpad=Enable
+sata_mode=AHCI
+fn_ctrl_swap=Disable
+sticky_fn=Disable
+trackpoint=Enable
+hyper_threading=Enable
+backlight=Both
\ No newline at end of file
diff --git a/src/mainboard/lenovo/t520/cmos.layout b/src/mainboard/lenovo/t520/cmos.layout
new file mode 100644
index 0000000000..6f8822fbcc
--- /dev/null
+++ b/src/mainboard/lenovo/t520/cmos.layout
@@ -0,0 +1,158 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2007-2008 coresystems GmbH
+## Copyright (C) 2014 Vladimir Serbinenko
+##
+## 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
+##
+
+# -----------------------------------------------------------------
+entries
+
+#start-bit length  config config-ID    name
+#0            8       r       0        seconds
+#8            8       r       0        alarm_seconds
+#16           8       r       0        minutes
+#24           8       r       0        alarm_minutes
+#32           8       r       0        hours
+#40           8       r       0        alarm_hours
+#48           8       r       0        day_of_week
+#56           8       r       0        day_of_month
+#64           8       r       0        month
+#72           8       r       0        year
+# -----------------------------------------------------------------
+# Status Register A
+#80           4       r       0        rate_select
+#84           3       r       0        REF_Clock
+#87           1       r       0        UIP
+# -----------------------------------------------------------------
+# Status Register B
+#88           1       r       0        auto_switch_DST
+#89           1       r       0        24_hour_mode
+#90           1       r       0        binary_values_enable
+#91           1       r       0        square-wave_out_enable
+#92           1       r       0        update_finished_enable
+#93           1       r       0        alarm_interrupt_enable
+#94           1       r       0        periodic_interrupt_enable
+#95           1       r       0        disable_clock_updates
+# -----------------------------------------------------------------
+# Status Register C
+#96           4       r       0        status_c_rsvd
+#100          1       r       0        uf_flag
+#101          1       r       0        af_flag
+#102          1       r       0        pf_flag
+#103          1       r       0        irqf_flag
+# -----------------------------------------------------------------
+# Status Register D
+#104          7       r       0        status_d_rsvd
+#111          1       r       0        valid_cmos_ram
+# -----------------------------------------------------------------
+# Diagnostic Status Register
+#112          8       r       0        diag_rsvd1
+
+# -----------------------------------------------------------------
+0          120       r       0        reserved_memory
+#120        264       r       0        unused
+
+# -----------------------------------------------------------------
+# RTC_BOOT_BYTE (coreboot hardcoded)
+384          1       e       4        boot_option
+385          1       e       4        last_boot
+388          4       r       0        reboot_bits
+#390          2       r       0        unused?
+
+# -----------------------------------------------------------------
+# coreboot config options: console
+392          3       e       5        baud_rate
+395          4       e       6        debug_level
+#399          1       r       0        unused
+
+400          8       h       0        volume
+
+# coreboot config options: southbridge
+408          1       e       1        nmi
+409          2       e       7        power_on_after_fail
+
+# coreboot config options: EC
+411         1       e       8        first_battery
+412         1       e       1        bluetooth
+413         1       e       1        wwan
+414         1       e       1        touchpad
+415         1       e       1        wlan
+416         1       e       1        trackpoint
+417         1       e       1        fn_ctrl_swap
+418         1       e       1        sticky_fn
+#419        2       r       0        unused
+421         1       e       9        sata_mode
+422	    2	    e	    10	     backlight
+
+# coreboot config options: cpu
+424          1       e       2        hyper_threading
+
+#425        559       r       0        unused
+
+# SandyBridge MRC Scrambler Seed values
+896         32        r       0        mrc_scrambler_seed
+928         32        r       0        mrc_scrambler_seed_s3
+960         16        r       0        mrc_scrambler_seed_chk
+
+# coreboot config options: check sums
+984         16       h       0        check_sum
+
+# -----------------------------------------------------------------
+
+enumerations
+
+#ID value   text
+1     0     Disable
+1     1     Enable
+2     0     Enable
+2     1     Disable
+4     0     Fallback
+4     1     Normal
+5     0     115200
+5     1     57600
+5     2     38400
+5     3     19200
+5     4     9600
+5     5     4800
+5     6     2400
+5     7     1200
+6     1     Emergency
+6     2     Alert
+6     3     Critical
+6     4     Error
+6     5     Warning
+6     6     Notice
+6     7     Info
+6     8     Debug
+6     9     Spew
+7     0     Disable
+7     1     Enable
+7     2     Keep
+8     0     Secondary
+8     1     Primary
+9     0     AHCI
+9     1     Compatible
+10    0     Both
+10    1     Keyboard only
+10    2	    Thinklight only
+10    3	    None
+# -----------------------------------------------------------------
+checksums
+
+checksum 392 415 984
+
+
diff --git a/src/mainboard/lenovo/t520/devicetree.cb b/src/mainboard/lenovo/t520/devicetree.cb
new file mode 100644
index 0000000000..475e49c02c
--- /dev/null
+++ b/src/mainboard/lenovo/t520/devicetree.cb
@@ -0,0 +1,139 @@
+chip northbridge/intel/sandybridge
+
+	# Enable DisplayPort Hotplug with 6ms pulse
+	register "gpu_dp_d_hotplug" = "0x06"
+
+	# Enable Panel as LVDS and configure power delays
+	register "gpu_panel_port_select" = "0"			# LVDS
+	register "gpu_panel_power_cycle_delay" = "6"		# T7: 500ms
+	register "gpu_panel_power_up_delay" = "100"		# T1+T2: 10ms
+	register "gpu_panel_power_down_delay" = "100"		# T5+T6: 10ms
+	register "gpu_panel_power_backlight_on_delay" = "2100"	# T3: 210ms
+	register "gpu_panel_power_backlight_off_delay" = "2100"	# T4: 210ms
+
+	device cpu_cluster 0 on
+		chip cpu/intel/socket_rPGA988B
+			device lapic 0 on end
+		end
+		chip cpu/intel/model_206ax
+			# Magic APIC ID to locate this chip
+			device lapic 0xACAC off end
+
+			# Coordinate with HW_ALL
+			register "pstate_coord_type" = "0xfe"
+
+			register "c1_acpower" = "1"	# ACPI(C1) = MWAIT(C1)
+			register "c2_acpower" = "3"	# ACPI(C2) = MWAIT(C3)
+			register "c3_acpower" = "5"	# ACPI(C3) = MWAIT(C7)
+
+			register "c1_battery" = "1"	# ACPI(C1) = MWAIT(C1)
+			register "c2_battery" = "3"	# ACPI(C2) = MWAIT(C3)
+			register "c3_battery" = "5"	# ACPI(C3) = MWAIT(C7)
+		end
+	end
+
+	device domain 0 on
+		device pci 00.0 on end # host bridge
+		device pci 02.0 on end # vga controller
+
+		chip southbridge/intel/bd82x6x # Intel Series 6 Cougar Point PCH
+			register "pirqa_routing" = "0x8b"
+			register "pirqb_routing" = "0x8a"
+			register "pirqc_routing" = "0x8b"
+			register "pirqd_routing" = "0x8b"
+			register "pirqe_routing" = "0x80"
+			register "pirqf_routing" = "0x80"
+			register "pirqg_routing" = "0x80"
+			register "pirqh_routing" = "0x80"
+
+			# GPI routing
+			#  0 No effect (default)
+			#  1 SMI# (if corresponding ALT_GPI_SMI_EN bit is also set)
+			#  2 SCI (if corresponding GPIO_EN bit is also set)
+			register "alt_gp_smi_en" = "0x0000"
+			register "gpi1_routing" = "2"
+			register "gpi8_routing" = "2"
+
+			# Enable SATA ports 0
+			register "sata_port_map" = "0x1f"
+			# Set max SATA speed to 6.0 Gb/s
+			register "sata_interface_speed_support" = "0x3"
+
+			register "gen1_dec" = "0x7c1601"
+			register "gen2_dec" = "0x0c15e1"
+			register "gen4_dec" = "0x0c06a1"
+
+			# Enable zero-based linear PCIe root port functions
+			register "pcie_port_coalesce" = "1"
+
+			device pci 16.0 on end # Management Engine Interface 1
+			device pci 16.1 off end
+			device pci 16.2 off end
+			device pci 16.3 off end
+			device pci 19.0 on end # Intel Gigabit Ethernet
+			device pci 1a.0 on end # USB2 EHCI #2
+			device pci 1b.0 on end # High Definition Audio
+			device pci 1c.0 on end # PCIe Port #1
+			device pci 1c.1 on end # PCIe Port #2 Integrated Wireless LAN
+			device pci 1c.2 off end
+			device pci 1c.3 on end # PCIe Port #3 Express Card
+			device pci 1c.4 on end # PCIe Port #4 MMC/SDXC + IEEE1394
+			device pci 1d.0 on end # USB2 EHCI #1
+			device pci 1f.0 on #LPC bridge
+				chip ec/lenovo/pmh7
+					device pnp ff.1 on # dummy
+					end
+					register "backlight_enable" = "0x01"
+					register "dock_event_enable" = "0x01"
+				end
+
+				chip ec/lenovo/h8
+					device pnp ff.2 on # dummy
+						io 0x60 = 0x62
+						io 0x62 = 0x66
+						io 0x64 = 0x1600
+						io 0x66 = 0x1604
+					end
+
+					register "config0" = "0xa7"
+					register "config1" = "0x09"
+					register "config2" = "0xa0"
+					register "config3" = "0xc2"
+
+					register "has_keyboard_backlight" = "1"
+
+					register "beepmask0" = "0x00"
+					register "beepmask1" = "0x86"
+					register "has_power_management_beeps" = "0"
+					register "event2_enable" = "0xff"
+					register "event3_enable" = "0xff"
+					register "event4_enable" = "0xd0"
+					register "event5_enable" = "0xfc"
+					register "event6_enable" = "0x00"
+					register "event7_enable" = "0x01"
+					register "event8_enable" = "0x7b"
+					register "event9_enable" = "0xff"
+					register "eventa_enable" = "0x01"
+					register "eventb_enable" = "0x00"
+					register "eventc_enable" = "0xff"
+					register "eventd_enable" = "0xff"
+					register "evente_enable" = "0x0d"
+				end
+			end # LPC bridge
+			device pci 1f.2 on end # SATA Controller 1
+			device pci 1f.3 on # SMBUS controller
+			        # eeprom, 8 virtual devices, same chip
+				chip drivers/i2c/at24rf08c
+					device i2c 54 on end
+					device i2c 55 on end
+					device i2c 56 on end
+					device i2c 57 on end
+					device i2c 5c on end
+					device i2c 5d on end
+					device i2c 5e on end
+					device i2c 5f on end
+				end
+			end # SMBus
+		end
+	end
+end
diff --git a/src/mainboard/lenovo/t520/dsdt.asl b/src/mainboard/lenovo/t520/dsdt.asl
new file mode 100644
index 0000000000..1dc3a66673
--- /dev/null
+++ b/src/mainboard/lenovo/t520/dsdt.asl
@@ -0,0 +1,60 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ * Copyright (C) 2011 The ChromiumOS Authors.  All rights reserved.
+ * Copyright (C) 2014 Vladimir Serbinenko
+ *
+ * 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
+ */
+
+#define THINKPAD_EC_GPE 17
+#define BRIGHTNESS_UP \_SB.PCI0.GFX0.LCD0.INCB
+#define BRIGHTNESS_DOWN \_SB.PCI0.GFX0.LCD0.DECB
+#define ACPI_VIDEO_DEVICE \_SB.PCI0.GFX0
+#define RP03_IS_EXPRESSCARD 1
+
+DefinitionBlock(
+	"dsdt.aml",
+	"DSDT",
+	0x02,		// DSDT revision: ACPI v2.0
+	"COREv4",	// OEM id
+	"COREBOOT",	// OEM table id
+	0x20110725	// OEM revision
+)
+{
+	// Some generic macros
+	#include "acpi/platform.asl"
+
+	// global NVS and variables
+	#include <southbridge/intel/bd82x6x/acpi/globalnvs.asl>
+
+	// General Purpose Events
+	//#include "acpi/gpe.asl"
+
+	#include <cpu/intel/model_206ax/acpi/cpu.asl>
+
+	Scope (\_SB) {
+		Device (PCI0)
+		{
+			#include <northbridge/intel/sandybridge/acpi/sandybridge.asl>
+			#include <southbridge/intel/bd82x6x/acpi/pch.asl>
+		}
+	}
+
+	#include "acpi/video.asl"
+
+	/* Chipset specific sleep states */
+	#include <southbridge/intel/bd82x6x/acpi/sleepstates.asl>
+}
diff --git a/src/mainboard/lenovo/t520/fadt.c b/src/mainboard/lenovo/t520/fadt.c
new file mode 100644
index 0000000000..27e6303d7e
--- /dev/null
+++ b/src/mainboard/lenovo/t520/fadt.c
@@ -0,0 +1,160 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ * Copyright (C) 2014 Vladimir Serbinenko
+ *
+ * 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
+ */
+
+#include <string.h>
+#include <device/pci.h>
+#include <arch/acpi.h>
+#include <cpu/x86/smm.h>
+
+void acpi_create_fadt(acpi_fadt_t * fadt, acpi_facs_t * facs, void *dsdt)
+{
+	acpi_header_t *header = &(fadt->header);
+	u16 pmbase = pci_read_config16(dev_find_slot(0, PCI_DEVFN(0x1f,0)),
+								0x40) & 0xfffe;
+
+	memset((void *) fadt, 0, sizeof(acpi_fadt_t));
+	memcpy(header->signature, "FACP", 4);
+	header->length = sizeof(acpi_fadt_t);
+	header->revision = 3;
+	memcpy(header->oem_id, OEM_ID, 6);
+	memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
+	memcpy(header->asl_compiler_id, "CORE", 4);
+	header->asl_compiler_revision = 1;
+
+	fadt->firmware_ctrl = (unsigned long) facs;
+	fadt->dsdt = (unsigned long) dsdt;
+	fadt->model = 1;
+	fadt->preferred_pm_profile = PM_MOBILE;
+
+	fadt->sci_int = 0x9;
+	fadt->smi_cmd = APM_CNT;
+	fadt->acpi_enable = APM_CNT_ACPI_ENABLE;
+	fadt->acpi_disable = APM_CNT_ACPI_DISABLE;
+	fadt->s4bios_req = 0x0;
+	fadt->pstate_cnt = 0;
+
+	fadt->pm1a_evt_blk = pmbase;
+	fadt->pm1b_evt_blk = 0x0;
+	fadt->pm1a_cnt_blk = pmbase + 0x4;
+	fadt->pm1b_cnt_blk = 0x0;
+	fadt->pm2_cnt_blk = pmbase + 0x50;
+	fadt->pm_tmr_blk = pmbase + 0x8;
+	fadt->gpe0_blk = pmbase + 0x20;
+	fadt->gpe1_blk = 0;
+
+	fadt->pm1_evt_len = 4;
+	fadt->pm1_cnt_len = 2;
+	fadt->pm2_cnt_len = 1;
+	fadt->pm_tmr_len = 4;
+	fadt->gpe0_blk_len = 16;
+	fadt->gpe1_blk_len = 0;
+	fadt->gpe1_base = 0;
+	fadt->cst_cnt = 0;
+	fadt->p_lvl2_lat = 101;  /* c2 not supported */
+	fadt->p_lvl3_lat = 87;
+	fadt->flush_size = 1024;
+	fadt->flush_stride = 16;
+	fadt->duty_offset = 1;
+	fadt->duty_width = 3;
+	fadt->day_alrm = 0xd;
+	fadt->mon_alrm = 0x00;
+	fadt->century = 0x00;
+	fadt->iapc_boot_arch = ACPI_FADT_LEGACY_DEVICES | ACPI_FADT_8042;
+
+	fadt->flags = ACPI_FADT_WBINVD |
+			ACPI_FADT_C1_SUPPORTED |
+			ACPI_FADT_SLEEP_BUTTON |
+			ACPI_FADT_RESET_REGISTER |
+			ACPI_FADT_SEALED_CASE |
+			ACPI_FADT_S4_RTC_WAKE |
+			ACPI_FADT_PLATFORM_CLOCK;
+
+	fadt->reset_reg.space_id = 1;
+	fadt->reset_reg.bit_width = 8;
+	fadt->reset_reg.bit_offset = 0;
+	fadt->reset_reg.resv = 0;
+	fadt->reset_reg.addrl = 0xcf9;
+	fadt->reset_reg.addrh = 0;
+
+	fadt->reset_value = 6;
+	fadt->x_firmware_ctl_l = (unsigned long)facs;
+	fadt->x_firmware_ctl_h = 0;
+	fadt->x_dsdt_l = (unsigned long)dsdt;
+	fadt->x_dsdt_h = 0;
+
+	fadt->x_pm1a_evt_blk.space_id = 1;
+	fadt->x_pm1a_evt_blk.bit_width = 32;
+	fadt->x_pm1a_evt_blk.bit_offset = 0;
+	fadt->x_pm1a_evt_blk.resv = 0;
+	fadt->x_pm1a_evt_blk.addrl = pmbase;
+	fadt->x_pm1a_evt_blk.addrh = 0x0;
+
+	fadt->x_pm1b_evt_blk.space_id = 1;
+	fadt->x_pm1b_evt_blk.bit_width = 0;
+	fadt->x_pm1b_evt_blk.bit_offset = 0;
+	fadt->x_pm1b_evt_blk.resv = 0;
+	fadt->x_pm1b_evt_blk.addrl = 0x0;
+	fadt->x_pm1b_evt_blk.addrh = 0x0;
+
+	fadt->x_pm1a_cnt_blk.space_id = 1;
+	fadt->x_pm1a_cnt_blk.bit_width = 16;
+	fadt->x_pm1a_cnt_blk.bit_offset = 0;
+	fadt->x_pm1a_cnt_blk.resv = 0;
+	fadt->x_pm1a_cnt_blk.addrl = pmbase + 0x4;
+	fadt->x_pm1a_cnt_blk.addrh = 0x0;
+
+	fadt->x_pm1b_cnt_blk.space_id = 1;
+	fadt->x_pm1b_cnt_blk.bit_width = 0;
+	fadt->x_pm1b_cnt_blk.bit_offset = 0;
+	fadt->x_pm1b_cnt_blk.resv = 0;
+	fadt->x_pm1b_cnt_blk.addrl = 0x0;
+	fadt->x_pm1b_cnt_blk.addrh = 0x0;
+
+	fadt->x_pm2_cnt_blk.space_id = 1;
+	fadt->x_pm2_cnt_blk.bit_width = 8;
+	fadt->x_pm2_cnt_blk.bit_offset = 0;
+	fadt->x_pm2_cnt_blk.resv = 0;
+	fadt->x_pm2_cnt_blk.addrl = pmbase + 0x50;
+	fadt->x_pm2_cnt_blk.addrh = 0x0;
+
+	fadt->x_pm_tmr_blk.space_id = 1;
+	fadt->x_pm_tmr_blk.bit_width = 32;
+	fadt->x_pm_tmr_blk.bit_offset = 0;
+	fadt->x_pm_tmr_blk.resv = 0;
+	fadt->x_pm_tmr_blk.addrl = pmbase + 0x8;
+	fadt->x_pm_tmr_blk.addrh = 0x0;
+
+	fadt->x_gpe0_blk.space_id = 1;
+	fadt->x_gpe0_blk.bit_width = 128;
+	fadt->x_gpe0_blk.bit_offset = 0;
+	fadt->x_gpe0_blk.resv = 0;
+	fadt->x_gpe0_blk.addrl = pmbase + 0x20;
+	fadt->x_gpe0_blk.addrh = 0x0;
+
+	fadt->x_gpe1_blk.space_id = 1;
+	fadt->x_gpe1_blk.bit_width = 0;
+	fadt->x_gpe1_blk.bit_offset = 0;
+	fadt->x_gpe1_blk.resv = 0;
+	fadt->x_gpe1_blk.addrl = 0x0;
+	fadt->x_gpe1_blk.addrh = 0x0;
+
+	header->checksum =
+	    acpi_checksum((void *) fadt, header->length);
+}
diff --git a/src/mainboard/lenovo/t520/hda_verb.h b/src/mainboard/lenovo/t520/hda_verb.h
new file mode 100644
index 0000000000..7999932ad8
--- /dev/null
+++ b/src/mainboard/lenovo/t520/hda_verb.h
@@ -0,0 +1,317 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 The ChromiumOS Authors.  All rights reserved.
+ * Copyright (C) 2014 Vladimir Serbinenko
+ *
+ * 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
+ */
+
+/*	Vendor Name    : IDT
+ *	Vendor ID      : 0x10ec0269
+ *	Subsystem ID   : 0x17aa21fa
+ *	Revision ID    : 0x100303
+ */
+
+
+static const u32 mainboard_cim_verb_data[] = {
+	/* coreboot specific header */
+	0x10ec0269,	// Codec Vendor / Device ID: Realtek ALC269VC
+	0x17aa21fa,	// Subsystem ID
+	0x0000007d,	// Number of 4 dword sets
+
+/* Bits 31:28 - Codec Address */
+/* Bits 27:20 - NID */
+/* Bits 19:8 - Verb ID */
+/* Bits 7:0  - Payload */
+
+/* NID 0x01 - NodeInfo */
+	0x001720FA,
+	0x00172121,
+	0x001722AA,
+	0x00172317,
+
+/* NID 0x0A - External Microphone Connector
+ * Config=0x04A11020 (External,Right; MicIn,3.5mm; Black,JD; DA,Seq)
+ */
+	0x00A71C20,
+	0x00A71D10,
+	0x00A71EA1,
+	0x00A71F04,
+
+/* NID 0x0B - Headphone Connector
+ * Config=0x0421101F (External,Right; HP,3.5mm; Black,JD; DA,Seq)
+ */
+	0x00B71C1F,
+	0x00B71D10,
+	0x00B71E21,
+	0x00B71F04,
+
+/* NID 0x0C - Not connected
+ * Config=0x40F000F0 (N/A,N/A; Other,Unknown; Unknown,JD; DA,Seq)
+ */
+	0x00C71CF0,
+	0x00C71D00,
+	0x00C71EF0,
+	0x00C71F40,
+
+/* NID 0x0D - Internal Speakers
+ * Config=0x90170110 (Fixed,Int; Speaker,Other Analog; Unknown,nJD; DA,Seq)
+ */
+	0x00D71C10,
+	0x00D71D01,
+	0x00D71E17,
+	0x00D71F90,
+
+/* NID 0x0F - Not connected
+ * Config=0x40F000F0
+ */
+	0x00F71CF0,
+	0x00F71D00,
+	0x00F71EF0,
+	0x00F71F40,
+
+/* NID 0x11 - Internal Microphone
+ * Config=0xD5A30140 (Fixed internal,Top; Mic In,ATIPI; Unknown,nJD; DA,Seq)
+ */
+	0x01171C40,
+	0x01171D01,
+	0x01171EA3,
+	0x01171FD5,
+
+	0x01271C40,
+	0x01271D01,
+	0x01271EA6,
+	0x01271F90,
+
+	0x01471C10,
+	0x01471D01,
+	0x01471E17,
+	0x01471F90,
+
+	0x01571C20,
+	0x01571D10,
+	0x01571E21,
+	0x01571F03,
+
+	0x01871C30,
+	0x01871D18,
+	0x01871EA1,
+	0x01871F03,
+
+	0x01971CF0,
+	0x01971D11,
+	0x01971E11,
+	0x01971F41,
+
+	0x01970804,
+	0x01870803,
+	0x01470740,
+	0x00970600,
+
+	0x00370600,
+	0x00270600,
+	0x00270600,
+	0x00270600,
+
+	0x01A71CF0,
+	0x01A71D11,
+	0x01A71E11,
+	0x01A71F41,
+
+	0x01D71C05,
+	0x01D71D82,
+	0x01D71E13,
+	0x01D71F40,
+
+	0x01E71CF0,
+	0x01E71D11,
+	0x01E71E11,
+	0x01E71F41,
+
+	/*
+	 * Hardware EQ Parameters
+	 * Sample Rate 88200
+	 */
+	0x0227A63F,	0x0227A73E,	0x0227A8EB,	0x0227A93F,
+	0x0227AA3E,	0x0227ABEB,	0x0227AC00,	0x0227AD80,
+	0x0227A681,	0x0227A782,	0x0227A829,	0x0227A981,
+	0x0227AA82,	0x0227AB29,	0x0227AC01,	0x0227AD80,
+	0x0227A63F,	0x0227A73E,	0x0227A8EB,	0x0227A93F,
+	0x0227AA3E,	0x0227ABEB,	0x0227AC02,	0x0227AD80,
+	0x0227A67E,	0x0227A77B,	0x0227A846,	0x0227A97E,
+	0x0227AA7B,	0x0227AB46,	0x0227AC03,	0x0227AD80,
+	0x0227A6C1,	0x0227A77F,	0x0227A898,	0x0227A9C1,
+	0x0227AA7F,	0x0227AB98,	0x0227AC04,	0x0227AD80,
+	0x0227A63E,	0x0227A7D1,	0x0227A84F,	0x0227A93E,
+	0x0227AAD1,	0x0227AB4F,	0x0227AC05,	0x0227AD80,
+	0x0227A683,	0x0227A7BE,	0x0227A855,	0x0227A983,
+	0x0227AABE,	0x0227AB55,	0x0227AC06,	0x0227AD80,
+	0x0227A63D,	0x0227A7B9,	0x0227A856,	0x0227A93D,
+	0x0227AAB9,	0x0227AB56,	0x0227AC07,	0x0227AD80,
+	0x0227A67C,	0x0227A741,	0x0227A8AB,	0x0227A97C,
+	0x0227AA41,	0x0227ABAB,	0x0227AC08,	0x0227AD80,
+	0x0227A6C3,	0x0227A775,	0x0227A85A,	0x0227A9C3,
+	0x0227AA75,	0x0227AB5A,	0x0227AC09,	0x0227AD80,
+	0x0227A63F,	0x0227A79E,	0x0227A829,	0x0227A93F,
+	0x0227AA9E,	0x0227AB29,	0x0227AC0A,	0x0227AD80,
+	0x0227A682,	0x0227A7E3,	0x0227A867,	0x0227A982,
+	0x0227AAE3,	0x0227AB67,	0x0227AC0B,	0x0227AD80,
+	0x0227A63E,	0x0227A74F,	0x0227A89D,	0x0227A93E,
+	0x0227AA4F,	0x0227AB9D,	0x0227AC0C,	0x0227AD80,
+	0x0227A67D,	0x0227A71C,	0x0227A899,	0x0227A97D,
+	0x0227AA1C,	0x0227AB99,	0x0227AC0D,	0x0227AD80,
+	0x0227A6C2,	0x0227A712,	0x0227A839,	0x0227A9C2,
+	0x0227AA12,	0x0227AB39,	0x0227AC0E,	0x0227AD80,
+	0x0227A63F,	0x0227A708,	0x0227A856,	0x0227A93F,
+	0x0227AA08,	0x0227AB56,	0x0227AC0F,	0x0227AD80,
+	0x0227A68E,	0x0227A7ED,	0x0227A89D,	0x0227A98E,
+	0x0227AAED,	0x0227AB9D,	0x0227AC10,	0x0227AD80,
+	0x0227A637,	0x0227A78F,	0x0227A853,	0x0227A937,
+	0x0227AA8F,	0x0227AB53,	0x0227AC11,	0x0227AD80,
+	0x0227A671,	0x0227A712,	0x0227A863,	0x0227A971,
+	0x0227AA12,	0x0227AB63,	0x0227AC12,	0x0227AD80,
+	0x0227A6C9,	0x0227A768,	0x0227A856,	0x0227A9C9,
+	0x0227AA68,	0x0227AB56,	0x0227AC13,	0x0227AD80,
+	0x0227A642,	0x0227A709,	0x0227A838,	0x0227A942,
+	0x0227AA09,	0x0227AB38,	0x0227AC14,	0x0227AD80,
+	0x0227A69C,	0x0227A78A,	0x0227A867,	0x0227A99C,
+	0x0227AA8A,	0x0227AB67,	0x0227AC15,	0x0227AD80,
+	0x0227A634,	0x0227A717,	0x0227A8E3,	0x0227A934,
+	0x0227AA17,	0x0227ABE3,	0x0227AC16,	0x0227AD80,
+	0x0227A663,	0x0227A775,	0x0227A899,	0x0227A963,
+	0x0227AA75,	0x0227AB99,	0x0227AC17,	0x0227AD80,
+	0x0227A6C9,	0x0227A7DE,	0x0227A8E5,	0x0227A9C9,
+	0x0227AADE,	0x0227ABE5,	0x0227AC18,	0x0227AD80,
+	0x0227A640,	0x0227A700,	0x0227A800,	0x0227A940,
+	0x0227AA00,	0x0227AB00,	0x0227AC19,	0x0227AD80,
+
+	/*
+	 * Hardware EQ Parameters
+	 * Sample Rate 96000
+	 */
+	0x0227A63F,	0x0227A74E,	0x0227A888,	0x0227A93F,
+	0x0227AA4E,	0x0227AB88,	0x0227AC1A,	0x0227AD80,
+	0x0227A681,	0x0227A762,	0x0227A8EE,	0x0227A981,
+	0x0227AA62,	0x0227ABEE,	0x0227AC1B,	0x0227AD80,
+	0x0227A63F,	0x0227A74E,	0x0227A888,	0x0227A93F,
+	0x0227AA4E,	0x0227AB88,	0x0227AC1C,	0x0227AD80,
+	0x0227A67E,	0x0227A79A,	0x0227A8E7,	0x0227A97E,
+	0x0227AA9A,	0x0227ABE7,	0x0227AC1D,	0x0227AD80,
+	0x0227A6C1,	0x0227A760,	0x0227A8C3,	0x0227A9C1,
+	0x0227AA60,	0x0227ABC3,	0x0227AC1E,	0x0227AD80,
+	0x0227A63E,	0x0227A7E9,	0x0227A84B,	0x0227A93E,
+	0x0227AAE9,	0x0227AB4B,	0x0227AC1F,	0x0227AD80,
+	0x0227A683,	0x0227A76C,	0x0227A8F2,	0x0227A983,
+	0x0227AA6C,	0x0227ABF2,	0x0227AC20,	0x0227AD80,
+	0x0227A63D,	0x0227A7E7,	0x0227A880,	0x0227A93D,
+	0x0227AAE7,	0x0227AB80,	0x0227AC21,	0x0227AD80,
+	0x0227A67C,	0x0227A793,	0x0227A80E,	0x0227A97C,
+	0x0227AA93,	0x0227AB0E,	0x0227AC22,	0x0227AD80,
+	0x0227A6C3,	0x0227A72F,	0x0227A835,	0x0227A9C3,
+	0x0227AA2F,	0x0227AB35,	0x0227AC23,	0x0227AD80,
+	0x0227A63F,	0x0227A7A5,	0x0227A8FE,	0x0227A93F,
+	0x0227AAA5,	0x0227ABFE,	0x0227AC24,	0x0227AD80,
+	0x0227A682,	0x0227A798,	0x0227A89D,	0x0227A982,
+	0x0227AA98,	0x0227AB9D,	0x0227AC25,	0x0227AD80,
+	0x0227A63E,	0x0227A772,	0x0227A839,	0x0227A93E,
+	0x0227AA72,	0x0227AB39,	0x0227AC26,	0x0227AD80,
+	0x0227A67D,	0x0227A767,	0x0227A863,	0x0227A97D,
+	0x0227AA67,	0x0227AB63,	0x0227AC27,	0x0227AD80,
+	0x0227A6C1,	0x0227A7E7,	0x0227A8C8,	0x0227A9C1,
+	0x0227AAE7,	0x0227ABC8,	0x0227AC28,	0x0227AD80,
+	0x0227A63F,	0x0227A71B,	0x0227A81A,	0x0227A93F,
+	0x0227AA1B,	0x0227AB1A,	0x0227AC29,	0x0227AD80,
+	0x0227A68D,	0x0227A763,	0x0227A872,	0x0227A98D,
+	0x0227AA63,	0x0227AB72,	0x0227AC2A,	0x0227AD80,
+	0x0227A638,	0x0227A733,	0x0227A809,	0x0227A938,
+	0x0227AA33,	0x0227AB09,	0x0227AC2B,	0x0227AD80,
+	0x0227A672,	0x0227A79C,	0x0227A88E,	0x0227A972,
+	0x0227AA9C,	0x0227AB8E,	0x0227AC2C,	0x0227AD80,
+	0x0227A6C8,	0x0227A7B1,	0x0227A8DD,	0x0227A9C8,
+	0x0227AAB1,	0x0227ABDD,	0x0227AC2D,	0x0227AD80,
+	0x0227A641,	0x0227A7E1,	0x0227A8D8,	0x0227A941,
+	0x0227AAE1,	0x0227ABD8,	0x0227AC2E,	0x0227AD80,
+	0x0227A699,	0x0227A70D,	0x0227A820,	0x0227A999,
+	0x0227AA0D,	0x0227AB20,	0x0227AC2F,	0x0227AD80,
+	0x0227A634,	0x0227A7FE,	0x0227A823,	0x0227A934,
+	0x0227AAFE,	0x0227AB23,	0x0227AC30,	0x0227AD80,
+	0x0227A666,	0x0227A7F2,	0x0227A8E0,	0x0227A966,
+	0x0227AAF2,	0x0227ABE0,	0x0227AC31,	0x0227AD80,
+	0x0227A6C9,	0x0227A720,	0x0227A804,	0x0227A9C9,
+	0x0227AA20,	0x0227AB04,	0x0227AC32,	0x0227AD80,
+	0x0227A640,	0x0227A700,	0x0227A800,	0x0227A940,
+	0x0227AA00,	0x0227AB00,	0x0227AC33,	0x0227AD80,
+
+	/* SAFEDSP Parameters */
+	0x022782C1,	0x02277127,	0x02277227,	0x02278801,
+	0x02278C58,	0x02278E90,	0x0227890A,	0x02278A14,
+	0x02278B0F,	0x0017B008,
+
+	/* Misc entries */
+		0x00B707C0, /* Enable PortB as Output with HP amp */
+		0x00D70740, /* Enable PortD as Output */
+		0x0017A200, /* Disable ClkEn of PortSenseTst */
+		0x0017C621, /* Slave Port - Port A used as microphone input for
+		                            combo Jack
+		               Master Port - Port B used for Jack Presence Detect
+		               Enable Combo Jack Detection */
+		0x0017A208, /* Enable ClkEn of PortSenseTst */
+		0x00170500, /* Set power state to D0 */
+
+	/* --- Next Codec --- */
+
+/*	Vendor Name    : Intel
+ *	Vendor ID      : 0x80862806
+ *	Subsystem ID   : 0x80860101
+ *	Revision ID    : 0x100000
+ */
+	/* coreboot specific header */
+	0x80862806,	// Codec Vendor / Device ID: Intel PantherPoint HDMI
+	0x80860101,	// Subsystem ID
+	0x00000004,	// Number of IDs
+
+	/* NID 0x01, HDA Codec Subsystem ID Verb Table: 0x80860101 */
+	0x30172001,
+	0x30172101,
+	0x30172286,
+	0x30172380,
+
+	/* Pin Complex (NID 0x05) Digital Out at Int HDMI */
+	0x30571c10,
+	0x30571d00,
+	0x30571e56,
+	0x30571f18,
+
+	/* Pin Complex (NID 0x06) Digital Out at Int HDMI */
+	0x30671c20,
+	0x30671d00,
+	0x30671e56,
+	0x30671f18,
+
+	/* Pin Complex (NID 0x07) Digital Out at Int HDMI */
+	0x30771c30,
+	0x30771d00,
+	0x30771e56,
+	0x30771f18
+};
+
+static const u32 mainboard_pc_beep_verbs[] = {
+	0x02177a00, /* Digital PCBEEP Gain: 0h=-9db, 1h=-6db ... 4h=+3db, 5h=+6db */
+};
+
+static const u32 mainboard_pc_beep_verbs_size =
+	ARRAY_SIZE(mainboard_pc_beep_verbs);
+
+
diff --git a/src/mainboard/lenovo/t520/mainboard.c b/src/mainboard/lenovo/t520/mainboard.c
new file mode 100644
index 0000000000..e387a9f95f
--- /dev/null
+++ b/src/mainboard/lenovo/t520/mainboard.c
@@ -0,0 +1,194 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ * Copyright (C) 2011-2012 Google Inc.
+ * Copyright (C) 2014 Vladimir Serbinenko
+ *
+ * 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
+ */
+
+#include <types.h>
+#include <string.h>
+#include <device/device.h>
+#include <device/pci_def.h>
+#include <device/pci_ops.h>
+#include <console/console.h>
+#if CONFIG_VGA_ROM_RUN
+#include <x86emu/x86emu.h>
+#endif
+#include <pc80/mc146818rtc.h>
+#include <arch/acpi.h>
+#include <arch/io.h>
+#include <arch/interrupt.h>
+#include <boot/coreboot_tables.h>
+#include "hda_verb.h"
+#include <southbridge/intel/bd82x6x/pch.h>
+#include <smbios.h>
+#include <device/pci.h>
+#include <cbfs.h>
+#include <pc80/keyboard.h>
+
+void mainboard_suspend_resume(void)
+{
+	/* Call SMM finalize() handlers before resume */
+	outb(0xcb, 0xb2);
+}
+
+#if CONFIG_VGA_ROM_RUN
+static int int15_handler(void)
+{
+	int res = 0;
+
+	printk(BIOS_DEBUG, "%s: INT15 function %04x!\n",
+	       __func__, X86_AX);
+
+	switch (X86_AX) {
+	case 0x5f34:
+		/*
+		 * Set Panel Fitting Hook:
+		 *  bit 2 = Graphics Stretching
+		 *  bit 1 = Text Stretching
+		 *  bit 0 = Centering (do not set with bit1 or bit2)
+		 *  0     = video bios default
+		 */
+		X86_AX = 0x005f;
+		X86_CL = 0x00;	/* Use video bios default */
+		res = 1;
+		break;
+	case 0x5f35:
+		/*
+		 * Boot Display Device Hook:
+		 *  bit 0 = CRT
+		 *  bit 1 = TV (eDP)
+		 *  bit 2 = EFP
+		 *  bit 3 = LFP
+		 *  bit 4 = CRT2
+		 *  bit 5 = TV2 (eDP)
+		 *  bit 6 = EFP2
+		 *  bit 7 = LFP2
+		 */
+		X86_AX = 0x005f;
+		X86_CX = 0x0000;	/* Use video bios default */
+		res = 1;
+		break;
+	case 0x5f51:
+		/*
+		 * Hook to select active LFP configuration:
+		 *  00h = No LVDS, VBIOS does not enable LVDS
+		 *  01h = Int-LVDS, LFP driven by integrated LVDS decoder
+		 *  02h = SVDO-LVDS, LFP driven by SVDO decoder
+		 *  03h = eDP, LFP Driven by Int-DisplayPort encoder
+		 */
+		X86_AX = 0x005f;
+		X86_CX = 0x0001;	/* Int-LVDS */
+		res = 1;
+		break;
+	case 0x5f70:
+		switch (X86_CH) {
+		case 0:
+			/* Get Mux */
+			X86_AX = 0x005f;
+			X86_CX = 0x0000;
+			res = 1;
+			break;
+		case 1:
+			/* Set Mux */
+			X86_AX = 0x005f;
+			X86_CX = 0x0000;
+			res = 1;
+			break;
+		case 2:
+			/* Get SG/Non-SG mode */
+			X86_AX = 0x005f;
+			X86_CX = 0x0000;
+			res = 1;
+			break;
+		default:
+			/* Interrupt was not handled */
+			printk(BIOS_DEBUG, "Unknown INT15 5f70 function: 0x%02x\n",
+			       X86_CH);
+			break;
+		}
+		break;
+
+	default:
+		printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n", X86_AX);
+		break;
+	}
+	return res;
+}
+#endif
+
+const char *smbios_mainboard_version(void)
+{
+	return "ThinkPad T520";
+}
+
+/* Audio Setup */
+
+extern const u32 *cim_verb_data;
+extern u32 cim_verb_data_size;
+extern const u32 *pc_beep_verbs;
+extern u32 pc_beep_verbs_size;
+
+static void verb_setup(void)
+{
+	cim_verb_data = mainboard_cim_verb_data;
+	cim_verb_data_size = sizeof(mainboard_cim_verb_data);
+	pc_beep_verbs = mainboard_pc_beep_verbs;
+	pc_beep_verbs_size = mainboard_pc_beep_verbs_size;
+
+}
+
+static void mainboard_init(device_t dev)
+{
+	RCBA32(0x38c8) = 0x00002005;
+	RCBA32(0x38c4) = 0x00802005;
+	RCBA32(0x38c0) = 0x00000007;
+
+	pc_keyboard_init(0);
+
+	/* Enable expresscard hotplug events.  */
+	pci_write_config32(dev_find_slot(0, PCI_DEVFN(0x1c, 2)),
+			   0xd8,
+			   pci_read_config32(dev_find_slot(0, PCI_DEVFN(0x1c, 2)), 0xd8)
+			   | (1 << 30));
+
+	pci_write_config16(dev_find_slot(0, PCI_DEVFN(0x1c, 2)),
+			   0x42, 0x142);
+}
+
+/* mainboard_enable is executed as first thing after
+enumerate_buses(). */
+static void mainboard_enable(device_t dev)
+{
+	dev->ops->init = mainboard_init;
+#if CONFIG_VGA_ROM_RUN
+	/* Install custom int15 handler for VGA OPROM */
+	mainboard_interrupt_handlers(0x15, &int15_handler);
+#endif
+	verb_setup();
+}
+
+void h8_mainboard_init_dock (void);
+
+void h8_mainboard_init_dock (void)
+{
+	return;
+}
+
+struct chip_operations mainboard_ops = {
+	.enable_dev = mainboard_enable,
+};
diff --git a/src/mainboard/lenovo/t520/romstage.c b/src/mainboard/lenovo/t520/romstage.c
new file mode 100644
index 0000000000..a2c3778773
--- /dev/null
+++ b/src/mainboard/lenovo/t520/romstage.c
@@ -0,0 +1,295 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2010 coresystems GmbH
+ * Copyright (C) 2011 The ChromiumOS Authors.  All rights reserved.
+ * Copyright (C) 2014 Vladimir Serbinenko
+ *
+ * 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
+ */
+
+#include <stdint.h>
+#include <string.h>
+#include <lib.h>
+#include <timestamp.h>
+#include <arch/byteorder.h>
+#include <arch/io.h>
+#include <device/pci_def.h>
+#include <device/pnp_def.h>
+#include <cpu/x86/lapic.h>
+#include <pc80/mc146818rtc.h>
+#include <cbmem.h>
+#include <console/console.h>
+#include <northbridge/intel/sandybridge/sandybridge.h>
+#include <northbridge/intel/sandybridge/raminit.h>
+#include <southbridge/intel/bd82x6x/pch.h>
+#include <southbridge/intel/bd82x6x/gpio.h>
+#include <arch/cpu.h>
+#include <cpu/x86/bist.h>
+#include <cpu/x86/msr.h>
+#include <cbfs.h>
+
+static void pch_enable_lpc(void)
+{
+	/* T520 EC Decode Range Port60/64, Port62/66 */
+	/* Enable EC, PS/2 Keyboard/Mouse */
+	pci_write_config16(PCH_LPC_DEV, LPC_EN,
+			   CNF2_LPC_EN | CNF1_LPC_EN | MC_LPC_EN | KBC_LPC_EN |
+			   COMA_LPC_EN);
+
+	pci_write_config32(PCH_LPC_DEV, LPC_GEN1_DEC, 0x7c1601);
+	pci_write_config32(PCH_LPC_DEV, LPC_GEN2_DEC, 0xc15e1);
+	pci_write_config32(PCH_LPC_DEV, LPC_GEN4_DEC, 0x0c06a1);
+
+	pci_write_config16(PCH_LPC_DEV, LPC_IO_DEC, 0x10);
+
+	pci_write_config32(PCH_LPC_DEV, 0xac,
+			   0x80010000);
+}
+
+static void rcba_config(void)
+{
+	/*
+	 *             GFX    INTA -> PIRQA (MSI)
+	 * D28IP_P1IP  WLAN   INTA -> PIRQB
+	 * D28IP_P2IP  ETH0   INTB -> PIRQF
+	 * D28IP_P3IP  SDCARD INTC -> PIRQD
+	 * D29IP_E1P   EHCI1  INTA -> PIRQD
+	 * D26IP_E2P   EHCI2  INTA -> PIRQF
+	 * D31IP_SIP   SATA   INTA -> PIRQB (MSI)
+	 * D31IP_SMIP  SMBUS  INTB -> PIRQH
+	 * D31IP_TTIP  THRT   INTC -> PIRQA
+	 * D27IP_ZIP   HDA    INTA -> PIRQA (MSI)
+	 *
+	 * Trackpad interrupt is edge triggered and cannot be shared.
+	 * TRACKPAD                -> PIRQG
+
+	 */
+
+	/* Device interrupt pin register (board specific) */
+	RCBA32(D31IP) = (INTC << D31IP_TTIP) | (NOINT << D31IP_SIP2) |
+			(INTB << D31IP_SMIP) | (INTA << D31IP_SIP);
+	RCBA32(D29IP) = (INTA << D29IP_E1P);
+	RCBA32(D28IP) = (INTA << D28IP_P1IP) | (INTB << D28IP_P2IP) |
+			(INTC << D28IP_P3IP);
+	RCBA32(D27IP) = (INTA << D27IP_ZIP);
+	RCBA32(D26IP) = (INTA << D26IP_E2P);
+	RCBA32(D25IP) = (NOINT << D25IP_LIP);
+	RCBA32(D22IP) = (NOINT << D22IP_MEI1IP);
+
+	/* Device interrupt route registers */
+	DIR_ROUTE(D31IR, PIRQB, PIRQH, PIRQA, PIRQC);
+	DIR_ROUTE(D29IR, PIRQD, PIRQE, PIRQF, PIRQG);
+	DIR_ROUTE(D28IR, PIRQB, PIRQF, PIRQD, PIRQE);
+	DIR_ROUTE(D27IR, PIRQA, PIRQH, PIRQA, PIRQB);
+	DIR_ROUTE(D26IR, PIRQF, PIRQE, PIRQG, PIRQH);
+	DIR_ROUTE(D25IR, PIRQA, PIRQB, PIRQC, PIRQD);
+	DIR_ROUTE(D22IR, PIRQA, PIRQB, PIRQC, PIRQD);
+
+	/* Enable IOAPIC (generic) */
+	RCBA16(OIC) = 0x0100;
+	/* PCH BWG says to read back the IOAPIC enable register */
+	(void) RCBA16(OIC);
+
+	/* Disable unused devices (board specific) */
+	RCBA32(FD) = 0x17f81fe3;
+	RCBA32(BUC) = 0;
+}
+
+void main(unsigned long bist)
+{
+	int boot_mode = 0;
+	int cbmem_was_initted;
+	u32 pm1_cnt;
+	u16 pm1_sts;
+
+	if (MCHBAR16(SSKPD) == 0xCAFE) {
+		outb(0x6, 0xcf9);
+		hlt ();
+	}
+
+	struct pei_data pei_data = {
+		.pei_version = PEI_VERSION,
+		.mchbar = DEFAULT_MCHBAR,
+		.dmibar = DEFAULT_DMIBAR,
+		.epbar = DEFAULT_EPBAR,
+		.pciexbar = CONFIG_MMCONF_BASE_ADDRESS,
+		.smbusbar = SMBUS_IO_BASE,
+		.wdbbar = 0x4000000,
+		.wdbsize = 0x1000,
+		.hpet_address = CONFIG_HPET_ADDRESS,
+		.rcba = DEFAULT_RCBABASE,
+		.pmbase = DEFAULT_PMBASE,
+		.gpiobase = DEFAULT_GPIOBASE,
+		.thermalbase = 0xfed08000,
+		.system_type = 0, // 0 Mobile, 1 Desktop/Server
+		.tseg_size = CONFIG_SMM_TSEG_SIZE,
+		.spd_addresses = { 0xA0, 0x00,0xA2,0x00 },
+		.ts_addresses = { 0x00, 0x00, 0x00, 0x00 },
+		.ec_present = 1,
+		.gbe_enable = 1,
+		.ddr3lv_support = 0,
+		// 0 = leave channel enabled
+		// 1 = disable dimm 0 on channel
+		// 2 = disable dimm 1 on channel
+		// 3 = disable dimm 0+1 on channel
+		.dimm_channel0_disabled = 2,
+		.dimm_channel1_disabled = 2,
+		.max_ddr3_freq = 1600,
+		.usb_port_config = {
+			 /* enabled   usb oc pin    length */
+			{ 1, 0, 0x0080 }, /* P0 (left, fan side), OC 0 */
+			{ 1, 1, 0x0080 }, /* P1 (left touchpad side), OC 1 */
+			{ 1, 0, 0x0040 }, /* P2: dock, OC 3 */
+			{ 1, 0, 0x0040 }, /* P3: wwan, no OC */
+			{ 1, 0, 0x0080 }, /* P4: Wacom tablet on X230t, otherwise empty */
+			{ 1, 0, 0x0080 }, /* P5: Expresscard, no OC */
+			{ 0, 0, 0x0000 }, /* P6: Empty */
+			{ 1, 0, 0x0080 }, /* P7: dock, no OC */
+			{ 1, 4, 0x0080 }, /* P8: Empty */
+			{ 1, 5, 0x0080 }, /* P9: Right (EHCI debug), OC 5 */
+			{ 1, 0, 0x0040 }, /* P10: fingerprint reader, no OC */
+			{ 1, 0, 0x0040 }, /* P11: bluetooth, no OC. */
+			{ 1, 0, 0x0040 }, /* P12: wlan, no OC */
+			{ 1, 0, 0x0080 }, /* P13: webcam, no OC */
+		},
+		.ddr_refresh_rate_config = 2, /* Force double refresh rate */
+	};
+
+	timestamp_init(get_initial_timestamp());
+	timestamp_add_now(TS_START_ROMSTAGE);
+
+	if (bist == 0)
+		enable_lapic();
+
+	pch_enable_lpc();
+
+	/* Enable GPIOs */
+	pci_write_config32(PCH_LPC_DEV, GPIO_BASE, DEFAULT_GPIOBASE|1);
+	pci_write_config8(PCH_LPC_DEV, GPIO_CNTL, 0x10);
+
+	outl(0x3962a5ff, DEFAULT_GPIOBASE);
+	outl(0x8ebf6aff, DEFAULT_GPIOBASE + 4);
+	outl(0x66957f3b, DEFAULT_GPIOBASE + 0xc);
+	outl(0x00080000, DEFAULT_GPIOBASE + 0x20);
+	outl(0x00002082, DEFAULT_GPIOBASE + 0x2c);
+	outl(0x02ff06de, DEFAULT_GPIOBASE + 0x30);
+	outl(0x1f47f9f5, DEFAULT_GPIOBASE + 0x34);
+	outl(0xbdbffd47, DEFAULT_GPIOBASE + 0x38);
+	outl(0x000000f0, DEFAULT_GPIOBASE + 0x40);
+	outl(0x00000ff0, DEFAULT_GPIOBASE + 0x44);
+	outl(0x00000f4f, DEFAULT_GPIOBASE + 0x48);
+	outl(0x01000000, DEFAULT_GPIOBASE + 0x60);
+
+	/* Initialize console device(s) */
+	console_init();
+
+	/* Halt if there was a built in self test failure */
+	report_bist_failure(bist);
+
+	/* Perform some early chipset initialization required
+	 * before RAM initialization can work
+	 */
+	sandybridge_early_initialization(SANDYBRIDGE_MOBILE);
+	printk(BIOS_DEBUG, "Back from sandybridge_early_initialization()\n");
+
+	/* Check PM1_STS[15] to see if we are waking from Sx */
+	pm1_sts = inw(DEFAULT_PMBASE + PM1_STS);
+
+	/* Read PM1_CNT[12:10] to determine which Sx state */
+	pm1_cnt = inl(DEFAULT_PMBASE + PM1_CNT);
+
+	if ((pm1_sts & WAK_STS) && ((pm1_cnt >> 10) & 7) == 5) {
+#if CONFIG_HAVE_ACPI_RESUME
+		printk(BIOS_DEBUG, "Resume from S3 detected.\n");
+		boot_mode = 2;
+		/* Clear SLP_TYPE. This will break stage2 but
+		 * we care for that when we get there.
+		 */
+		outl(pm1_cnt & ~(7 << 10), DEFAULT_PMBASE + PM1_CNT);
+#else
+		printk(BIOS_DEBUG, "Resume from S3 detected, but disabled.\n");
+#endif
+	}
+
+	post_code(0x38);
+	/* Enable SPD ROMs and DDR-III DRAM */
+	enable_smbus();
+
+	/* Prepare USB controller early in S3 resume */
+	if (boot_mode == 2)
+		enable_usb_bar();
+
+	post_code(0x39);
+	post_code(0x3a);
+
+	pei_data.boot_mode = boot_mode;
+	timestamp_add_now(TS_BEFORE_INITRAM);
+
+	/* MRC.bin has a bug and sometimes halts (instead of reboot?).
+	 */
+	if (boot_mode != 2) {
+		RCBA32(GCS) = RCBA32(GCS) & ~(1 << 5);	/* reset */
+		outw((0 << 11), DEFAULT_PMBASE | 0x60 | 0x08);	/* let timer go */
+	}
+
+	sdram_initialize(&pei_data);
+
+	if (boot_mode != 2) {
+		RCBA32(GCS) = RCBA32(GCS) | (1 << 5);	/* No reset */
+		outw((1 << 11), DEFAULT_PMBASE | 0x60 | 0x08);	/* halt timer */
+	}
+
+	timestamp_add_now(TS_AFTER_INITRAM);
+	post_code(0x3c);
+
+	rcba_config();
+	post_code(0x3d);
+
+	quick_ram_check();
+	post_code(0x3e);
+
+	MCHBAR16(SSKPD) = 0xCAFE;
+	cbmem_was_initted = !cbmem_recovery(boot_mode == 2);
+	if (boot_mode != 2) {
+		save_mrc_data(&pei_data);
+	}
+
+#if CONFIG_HAVE_ACPI_RESUME
+	/* If there is no high memory area, we didn't boot before, so
+	 * this is not a resume. In that case we just create the cbmem toc.
+	 */
+
+	*(u32 *)CBMEM_BOOT_MODE = 0;
+	*(u32 *)CBMEM_RESUME_BACKUP = 0;
+
+	if ((boot_mode == 2) && cbmem_was_initted) {
+		void *resume_backup_memory = cbmem_find(CBMEM_ID_RESUME);
+		if (resume_backup_memory) {
+			*(u32 *)CBMEM_BOOT_MODE = boot_mode;
+			*(u32 *)CBMEM_RESUME_BACKUP = (u32)resume_backup_memory;
+		}
+		/* Magic for S3 resume */
+		pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, 0xcafed00d);
+	} else if (boot_mode == 2) {
+		/* Failed S3 resume, reset to come up cleanly */
+		outb(0x6, 0xcf9);
+		hlt();
+	} else {
+		pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, 0xcafebabe);
+	}
+#endif
+	post_code(0x3f);
+	timestamp_add_now(TS_END_ROMSTAGE);
+}
diff --git a/src/mainboard/lenovo/t520/smi.h b/src/mainboard/lenovo/t520/smi.h
new file mode 100644
index 0000000000..f7ffb41b5c
--- /dev/null
+++ b/src/mainboard/lenovo/t520/smi.h
@@ -0,0 +1,20 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2010 coresystems GmbH
+ * Copyright (C) 2011 The ChromiumOS Authors.  All rights reserved.
+ * Copyright (C) 2014 Vladimir Serbinenko
+ *
+ * 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
+ */
\ No newline at end of file
diff --git a/src/mainboard/lenovo/t520/smihandler.c b/src/mainboard/lenovo/t520/smihandler.c
new file mode 100644
index 0000000000..f4ed367d8a
--- /dev/null
+++ b/src/mainboard/lenovo/t520/smihandler.c
@@ -0,0 +1,169 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2008-2009 coresystems GmbH
+ * Copyright (C) 2014 Vladimir Serbinenko
+ *
+ * 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
+ */
+
+#include <arch/io.h>
+#include <console/console.h>
+#include <cpu/x86/smm.h>
+#include <ec/acpi/ec.h>
+#include <pc80/mc146818rtc.h>
+#include <ec/lenovo/h8/h8.h>
+#include <delay.h>
+#include <southbridge/intel/bd82x6x/nvs.h>
+#include <southbridge/intel/bd82x6x/pch.h>
+#include <southbridge/intel/bd82x6x/me.h>
+#include <northbridge/intel/sandybridge/sandybridge.h>
+#include <cpu/intel/model_206ax/model_206ax.h>
+
+/* The southbridge SMI handler checks whether gnvs has a
+ * valid pointer before calling the trap handler
+ */
+extern global_nvs_t *gnvs;
+
+static void mainboard_smm_init(void)
+{
+	printk(BIOS_DEBUG, "initializing SMI\n");
+	/* Enable 0x1600/0x1600 register pair */
+	ec_set_bit(0x00, 0x05);
+}
+
+int mainboard_io_trap_handler(int smif)
+{
+	static int smm_initialized;
+
+	if (!smm_initialized) {
+		mainboard_smm_init();
+		smm_initialized = 1;
+	}
+
+	/* On success, the IO Trap Handler returns 1
+	 * On failure, the IO Trap Handler returns a value != 1 */
+	return 0;
+}
+
+static void mainboard_smi_brightness_up(void)
+{
+	u8 value;
+
+	if ((value = pci_read_config8(PCI_DEV(0, 2, 1), 0xf4)) < 0xf0)
+		pci_write_config8(PCI_DEV(0, 2, 1), 0xf4, (value + 0x10) | 0xf);
+}
+
+static void mainboard_smi_brightness_down(void)
+{
+	u8 value;
+
+	if ((value = pci_read_config8(PCI_DEV(0, 2, 1), 0xf4)) > 0x10)
+		pci_write_config8(PCI_DEV(0, 2, 1), 0xf4,
+		(value - 0x10) & 0xf0);
+}
+
+static void mainboard_smi_handle_ec_sci(void)
+{
+	u8 status = inb(EC_SC);
+	u8 event;
+
+	if (!(status & EC_SCI_EVT))
+		return;
+
+	event = ec_query();
+	printk(BIOS_DEBUG, "EC event %02x\n", event);
+
+	switch (event) {
+	case 0x14:
+		/* brightness up */
+		mainboard_smi_brightness_up();
+		break;
+	case 0x15:
+		/* brightness down */
+		mainboard_smi_brightness_down();
+		break;
+	default:
+		break;
+	}
+}
+
+void mainboard_smi_gpi(u32 gpi_sts)
+{
+	if (gpi_sts & (1 << 12))
+		mainboard_smi_handle_ec_sci();
+}
+
+static int mainboard_finalized = 0;
+
+int mainboard_smi_apmc(u8 data)
+{
+	u16 pmbase = pci_read_config16(PCI_DEV(0, 0x1f, 0), 0x40) & 0xfffc;
+	u8 tmp;
+
+	printk(BIOS_DEBUG, "%s: pmbase %04X, data %02X\n", __func__, pmbase,
+	       data);
+
+	if (!pmbase)
+		return 0;
+
+	switch (data) {
+	case APM_CNT_ACPI_ENABLE:
+		/* use 0x1600/0x1604 to prevent races with userspace */
+		ec_set_ports(0x1604, 0x1600);
+		/* route H8SCI to SCI */
+		outw(inw(ALT_GP_SMI_EN) & ~0x1000, pmbase + ALT_GP_SMI_EN);
+		tmp = pci_read_config8(PCI_DEV(0, 0x1f, 0), 0xbb);
+		tmp &= ~0x03;
+		tmp |= 0x02;
+		pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xbb, tmp);
+		/* discard all events, and enable attention */
+		ec_write(0x80, 0x01);
+		break;
+	case APM_CNT_ACPI_DISABLE:
+		/* we have to use port 0x62/0x66, as 0x1600/0x1604 doesn't
+		   provide a EC query function */
+		ec_set_ports(0x66, 0x62);
+		/* route H8SCI# to SMI */
+		outw(inw(pmbase + ALT_GP_SMI_EN) | 0x1000,
+		     pmbase + ALT_GP_SMI_EN);
+		tmp = pci_read_config8(PCI_DEV(0, 0x1f, 0), 0xbb);
+		tmp &= ~0x03;
+		tmp |= 0x01;
+		pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xbb, tmp);
+		/* discard all events, and enable attention */
+		ec_write(0x80, 0x01);
+		break;
+	case APM_CNT_FINALIZE:
+		printk(BIOS_DEBUG, "APMC: FINALIZE\n");
+		if (mainboard_finalized) {
+			printk(BIOS_DEBUG, "APMC#: Already finalized\n");
+			return 0;
+		}
+
+		intel_me_finalize_smm();
+		intel_pch_finalize_smm();
+		intel_sandybridge_finalize_smm();
+		intel_model_206ax_finalize_smm();
+
+		mainboard_finalized = 1;
+		break;
+
+	default:
+		break;
+	}
+	return 0;
+}
diff --git a/src/mainboard/lenovo/t520/thermal.h b/src/mainboard/lenovo/t520/thermal.h
new file mode 100644
index 0000000000..23bdb76202
--- /dev/null
+++ b/src/mainboard/lenovo/t520/thermal.h
@@ -0,0 +1,30 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 The Chromium OS Authors. All rights reserved.
+ * Copyright (C) 2014 Vladimir Serbinenko
+ *
+ * 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 T520_THERMAL_H
+#define T520_THERMAL_H
+
+	/* Temperature which OS will shutdown at */
+	#define CRITICAL_TEMPERATURE	100
+
+	/* Temperature which OS will throttle CPU */
+	#define PASSIVE_TEMPERATURE	90
+
+#endif /* T520_THERMAL_H */