mb/51nb: Add support for the 51nb X210

The 51nb X210 is a replacement motherboard for Thinkpad X200/X201 systems,
based on a modern Kabylake CPU. It also ships with no firmware protection,
(IFD is fully unlocked, no protected regions are set, no Bootguard),
making it an ideal coreboot target. This port is based on the support for
the Skylake-based Purism Librem 13v3, with the following significant
changes:

* EC firmware is contained within the system SPI flash, and so a blob of
  EC firmware must be injected to a defined location during image build.
* GPIO layout is different - this is currently just a raw import of the
  GPIO configuration from the vendor firmware
* The system has two DIMMs, so an additional SPD address has been added
* The USB port layout is different
* The EC must be enabled at boot time through SuperIO-style logical device
  configuration
* EC register layout is different, necessitating changes in the ACPI tables
* The HDA pins are different
* The genx_dec config is different

All hardware appears to work as expected, although the SD reader is
untested.

Signed-off-by: Matthew Garrett <mjg59@google.com>
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Change-Id: If74621e76d703f629b54f1feb1acfc95cc72d183
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32531
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

19 files changed, 944 insertions, 0 deletions

diff --git a/src/mainboard/51nb/Kconfig b/src/mainboard/51nb/Kconfig
new file mode 100644
index 0000000000..2b3a493c7a
--- /dev/null
+++ b/src/mainboard/51nb/Kconfig
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# This file is part of the coreboot project.
+
+if VENDOR_51NB
+
+choice
+	prompt "Mainboard model"
+
+source "src/mainboard/51nb/*/Kconfig.name"
+
+endchoice
+
+source "src/mainboard/51nb/*/Kconfig"
+
+config MAINBOARD_VENDOR
+	string "Mainboard Vendor"
+	default "51NB"
+
+endif # VENDOR_51NB
diff --git a/src/mainboard/51nb/Kconfig.name b/src/mainboard/51nb/Kconfig.name
new file mode 100644
index 0000000000..6f99514dff
--- /dev/null
+++ b/src/mainboard/51nb/Kconfig.name
@@ -0,0 +1,2 @@
+config VENDOR_51NB
+	bool "51NB"
diff --git a/src/mainboard/51nb/x210/Kconfig b/src/mainboard/51nb/x210/Kconfig
new file mode 100644
index 0000000000..70b3da86f9
--- /dev/null
+++ b/src/mainboard/51nb/x210/Kconfig
@@ -0,0 +1,53 @@
+if BOARD_51NB_X210
+
+config BOARD_SPECIFIC_OPTIONS
+	def_bool y
+	select BOARD_ROMSIZE_KB_8192
+	select EC_51NB_NPCE985LA0DX
+	select HAVE_ACPI_RESUME
+	select HAVE_ACPI_TABLES
+	select SOC_INTEL_COMMON_BLOCK_HDA_VERB
+	select SOC_INTEL_KABYLAKE
+	select SPD_READ_BY_WORD
+	select SYSTEM_TYPE_LAPTOP
+
+config MAINBOARD_FAMILY
+	string
+	default "X210"
+
+config MAINBOARD_PART_NUMBER
+	string
+	default "X210"
+
+config MAINBOARD_VERSION
+	string
+	default "1.0"
+
+config MAINBOARD_DIR
+	string
+	default "51nb/x210"
+
+config MAX_CPUS
+	int
+	default 8
+
+config VGA_BIOS_ID
+	string
+	default "8086,5917"
+
+config DIMM_MAX
+	int
+	default 2
+
+config DIMM_SPD_SIZE
+	int
+	default 512
+
+config FMDFILE
+	string
+	default "src/mainboard/$(CONFIG_MAINBOARD_DIR)/board.fmd"
+
+config NO_POST
+	default y
+
+endif
diff --git a/src/mainboard/51nb/x210/Kconfig.name b/src/mainboard/51nb/x210/Kconfig.name
new file mode 100644
index 0000000000..1cae5dda0a
--- /dev/null
+++ b/src/mainboard/51nb/x210/Kconfig.name
@@ -0,0 +1,2 @@
+config BOARD_51NB_X210
+	bool "51NB X210"
diff --git a/src/mainboard/51nb/x210/Makefile.inc b/src/mainboard/51nb/x210/Makefile.inc
new file mode 100644
index 0000000000..6555e990e6
--- /dev/null
+++ b/src/mainboard/51nb/x210/Makefile.inc
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# This file is part of the coreboot project.
+
+ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_HDA_VERB) += hda_verb.c
diff --git a/src/mainboard/51nb/x210/acpi/battery.asl b/src/mainboard/51nb/x210/acpi/battery.asl
new file mode 100644
index 0000000000..9064ad5cee
--- /dev/null
+++ b/src/mainboard/51nb/x210/acpi/battery.asl
@@ -0,0 +1,93 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* This file is part of the coreboot project. */
+
+Device (BAT)
+{
+	Name (_HID, EisaId ("PNP0C0A"))
+	Name (_UID, 1)
+	Name (_PCL, Package () { \_SB })
+
+	Method (_STA, 0, NotSerialized)  // _STA: Status
+	{
+		If (B1SS)
+		{
+			Return (0x1F)
+		}
+		Else
+		{
+			Return (0x0F)
+		}
+	}
+
+	Name (PBIF, Package () {
+		0x00000001,  /* 0x00: Power Unit: mAH */
+		0xFFFFFFFF,  /* 0x01: Design Capacity */
+		0xFFFFFFFF,  /* 0x02: Last Full Charge Capacity */
+		0x00000001,  /* 0x03: Battery Technology: Rechargeable */
+		0xFFFFFFFF,  /* 0x04: Design Voltage */
+		0x00000000,  /* 0x05: Design Capacity of Warning */
+		0xFFFFFFFF,  /* 0x06: Design Capacity of Low */
+		0x00000001,  /* 0x07: Capacity Granularity 1 */
+		0x00000001,  /* 0x08: Capacity Granularity 2 */
+		"Y91",       /* 0x09: Model Number */
+		"",          /* 0x0a: Serial Number */
+		"LION",      /* 0x0b: Battery Type */
+		"CJOYIN"     /* 0x0c: OEM Information */
+	})
+
+	Method (_BIF, 0, Serialized)
+	{
+		/* Design Capacity */
+		Store (DGCP, Index (PBIF, 1))
+
+		/* Last Full Charge Capacity */
+		Store (FLCP, Index (PBIF, 2))
+
+		/* Design Voltage */
+		Store (DGVO, Index (PBIF, 4))
+
+		/* Design Capacity of Warning */
+		Store (BDW, Index (PBIF, 5))
+
+		/* Design Capacity of Low */
+		Store (BDL, Index (PBIF, 6))
+
+		Return (PBIF)
+	}
+
+	Name (PBST, Package () {
+		0x00000000,  /* 0x00: Battery State */
+		0xFFFFFFFF,  /* 0x01: Battery Present Rate */
+		0xFFFFFFFF,  /* 0x02: Battery Remaining Capacity */
+		0xFFFFFFFF,  /* 0x03: Battery Present Voltage */
+	})
+
+	Method (_BST, 0, NotSerialized)  // _BST: Battery Status
+	{
+		/*
+		* 0: BATTERY STATE
+		*
+		* bit 0 = discharging
+		* bit 1 = charging
+		* bit 2 = critical level
+		*/
+		Store (BSTS, Index (PBST, 0))
+
+		/*
+		* 1: BATTERY PRESENT RATE
+		*/
+		Store (BPR, Index (PBST, 1))
+
+		/*
+		* 2: BATTERY REMAINING CAPACITY
+		*/
+		Store (BRC, Index (PBST, 2))
+
+		/*
+		* 3: BATTERY PRESENT VOLTAGE
+		*/
+		Store (BPV, Index (PBST, 3))
+
+		Return (PBST)
+	}
+}
diff --git a/src/mainboard/51nb/x210/acpi/ec.asl b/src/mainboard/51nb/x210/acpi/ec.asl
new file mode 100644
index 0000000000..5ebc0aca4c
--- /dev/null
+++ b/src/mainboard/51nb/x210/acpi/ec.asl
@@ -0,0 +1,115 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* This file is part of the coreboot project. */
+
+Device (EC)
+{
+	Name (_HID, EisaId ("PNP0C09"))
+	Name (_UID, 0)
+
+	Name (_GPE, 0x4F)  // _GPE: General Purpose Events
+	Name (_CRS, ResourceTemplate () {
+		IO (Decode16, 0x62, 0x62, 1, 1)
+		IO (Decode16, 0x66, 0x66, 1, 1)
+	})
+
+	OperationRegion (ERAM, EmbeddedControl, Zero, 0xFF)
+	Field (ERAM, ByteAcc, Lock, Preserve)
+	{
+		Offset (0x50),
+		CTMP,   8,
+		CFAN,   8,
+		B1SS,   1,
+		BSTS,   2,
+		ACIN,   1,
+		Offset (0x53),
+		BKLG,   8,
+		TOUP,   1,
+		WIRE,   1,
+		BLTH,   1,
+		LIDC,   1,
+		APFG,   1,
+		WRST,   1,
+		BTST,   1,
+		ACEB,   1,
+		CAME,   1,
+		Offset (0x60),
+		DGCP,   16,
+		FLCP,   16,
+		DGVO,   16,
+		BDW,    16,
+		BDL,    16,
+		BPR,    16,
+		BRC,    16,
+		BPV,    16
+	}
+
+	Method (_REG, 2, NotSerialized)
+	{
+		/* Initialize AC power state */
+		Store (ACIN, \PWRS)
+
+		/* Initialize LID switch state */
+		Store (LIDC, \LIDS)
+	}
+
+	/* KEY_BRIGHTNESSUP */
+	Method (_Q04)
+	{
+		Notify(\_SB.PCI0.GFX0.LCD, 0x86)
+	}
+
+	/* KEY_BRIGHTNESSDOWN */
+	Method (_Q05)
+	{
+		Notify(\_SB.PCI0.GFX0.LCD, 0x87)
+	}
+
+	/* Battery Information Event */
+	Method (_Q0C)
+	{
+		Notify (BAT, 0x81)
+	}
+
+	/* AC event */
+	Method (_Q0D)
+	{
+		Store (ACIN, \PWRS)
+		Notify (AC, 0x80)
+	}
+
+	/* Lid event */
+	Method (_Q0E)
+	{
+		Store (LIDC, \LIDS)
+		Notify (LID0, 0x80)
+	}
+
+	/* Battery Information Event */
+	Method (_Q13)
+	{
+		Notify (BAT, 0x81)
+	}
+
+	/* Battery Status Event */
+	Method (_Q14)
+	{
+		Notify (BAT, 0x80)
+	}
+
+	Device (AC)
+	{
+		Name (_HID, "ACPI0003")
+		Name (_PCL, Package () { \_SB })
+
+		Method (_STA)
+		{
+			Return (0x0F)
+		}
+		Method (_PSR)
+		{
+			Return (\PWRS)
+		}
+	}
+
+	#include "battery.asl"
+}
diff --git a/src/mainboard/51nb/x210/acpi/graphics.asl b/src/mainboard/51nb/x210/acpi/graphics.asl
new file mode 100644
index 0000000000..218b95758f
--- /dev/null
+++ b/src/mainboard/51nb/x210/acpi/graphics.asl
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* This file is part of the coreboot project. */
+
+Device (GFX0)
+{
+	Name (_ADR, 0x00020000)
+	Method (_DOS, 1, NotSerialized)
+	{
+		/* We never do anything in firmware, so _DOS is a noop */
+	}
+	Method (_DOD, 0, NotSerialized)
+	{
+		return (Package (0x03)
+		{
+			0x80000410, /* LCD */
+			0x80000120, /* VGA */
+			0x80000330 /* DP */
+		})
+	}
+	Device (LCD)
+	{
+		Method (_ADR, 0, Serialized)
+		{
+			Return (0x800000410)
+		}
+
+		Method (_BCL, 0, NotSerialized)
+		{
+			Return (Package (0x12)
+			{
+				0x0A,
+				0x0F,
+				0x00,
+				0x01,
+				0x02,
+				0x03,
+				0x04,
+				0x05,
+				0x06,
+				0x07,
+				0x08,
+				0x09,
+				0x0A,
+				0x0B,
+				0x0C,
+				0x0D,
+				0x0E,
+				0x0F
+			})
+		}
+		Method (_BCM, 1, NotSerialized)
+		{
+			\_SB.PCI0.LPCB.EC.BKLG = Arg0
+		}
+		Method (_BQC, 0, NotSerialized)
+		{
+			Return (\_SB.PCI0.LPCB.EC.BKLG)
+		}
+	}
+}
diff --git a/src/mainboard/51nb/x210/acpi/mainboard.asl b/src/mainboard/51nb/x210/acpi/mainboard.asl
new file mode 100644
index 0000000000..fb389a40ad
--- /dev/null
+++ b/src/mainboard/51nb/x210/acpi/mainboard.asl
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* This file is part of the coreboot project. */
+
+Scope (\_SB)
+{
+	Device (LID0)
+	{
+		Name (_HID, EisaId ("PNP0C0D"))
+
+		Method (_STA)
+		{
+			Return (0xF)
+		}
+
+		Method (_LID)
+		{
+			Return (\LIDS)
+		}
+	}
+
+	Device (PWRB)
+	{
+		Name (_HID, EisaId ("PNP0C0C"))
+
+		Method (_STA)
+		{
+			Return (0xF)
+		}
+
+		Name (_PRW, Package () { 27, 4 })
+	}
+
+	Device (SLPB)
+	{
+		Name (_HID, EisaId ("PNP0C0E"))
+
+		Method (_STA)
+		{
+			Return (0xF)
+		}
+	}
+}
diff --git a/src/mainboard/51nb/x210/acpi/platform.asl b/src/mainboard/51nb/x210/acpi/platform.asl
new file mode 100644
index 0000000000..d0e34b6254
--- /dev/null
+++ b/src/mainboard/51nb/x210/acpi/platform.asl
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* This file is part of the coreboot project. */
+
+/* Enable ACPI _SWS methods */
+#include <soc/intel/common/acpi/acpi_wake_source.asl>
+
+/*
+ * 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)
+{
+	Store(\_SB.PCI0.LPCB.EC.LIDC, \LIDS)
+	Store(\_SB.PCI0.LPCB.EC.ACIN, \PWRS)
+	Return (Package (){ 0, 0 })
+}
diff --git a/src/mainboard/51nb/x210/acpi/superio.asl b/src/mainboard/51nb/x210/acpi/superio.asl
new file mode 100644
index 0000000000..cb77a3c7a8
--- /dev/null
+++ b/src/mainboard/51nb/x210/acpi/superio.asl
@@ -0,0 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* This file is part of the coreboot project. */
+
+#include <drivers/pc80/pc/ps2_controller.asl>
diff --git a/src/mainboard/51nb/x210/board.fmd b/src/mainboard/51nb/x210/board.fmd
new file mode 100644
index 0000000000..1955a05409
--- /dev/null
+++ b/src/mainboard/51nb/x210/board.fmd
@@ -0,0 +1,15 @@
+#
+# Manually defined FMD in order to ensure that space is reserved for the EC
+# at the base of the BIOS region.
+#
+
+FLASH 8M {
+	BIOS@0x200000 0x600000 {
+		EC@0x0 0x10000
+		RW_MRC_CACHE@0x10000 0x10000
+		SMMSTORE@0x20000 0x40000
+		CONSOLE@0x60000 0x20000
+		FMAP@0x80000 0x200
+		COREBOOT(CBFS)
+	}
+}
diff --git a/src/mainboard/51nb/x210/board_info.txt b/src/mainboard/51nb/x210/board_info.txt
new file mode 100644
index 0000000000..65c46089bc
--- /dev/null
+++ b/src/mainboard/51nb/x210/board_info.txt
@@ -0,0 +1,8 @@
+Vendor name: 51NB
+Board name: Thinkpad X210
+Category: laptop
+ROM package: SOIC8
+ROM protocol: SPI
+ROM socketed: n
+Flashrom support: y
+Release year: 2017
diff --git a/src/mainboard/51nb/x210/devicetree.cb b/src/mainboard/51nb/x210/devicetree.cb
new file mode 100644
index 0000000000..7ee3b2c87e
--- /dev/null
+++ b/src/mainboard/51nb/x210/devicetree.cb
@@ -0,0 +1,167 @@
+chip soc/intel/skylake
+
+	# Enable deep Sx states
+	register "deep_s3_enable_ac" = "1"
+	register "deep_s3_enable_dc" = "1"
+	register "deep_s5_enable_ac" = "1"
+	register "deep_s5_enable_dc" = "1"
+	register "deep_sx_config" = "DSX_EN_LAN_WAKE_PIN"
+
+	register "eist_enable" = "1"
+
+	# GPE configuration
+	# Note that GPE events called out in ASL code rely on this
+	# route. i.e. If this route changes then the affected GPE
+	# offset bits also need to be changed.
+	register "gpe0_dw0" = "GPP_C"
+	register "gpe0_dw1" = "GPP_D"
+	register "gpe0_dw2" = "GPP_E"
+
+	register "gen1_dec" = "0x000c0081"
+	register "gen2_dec" = "0x000c0681"
+	register "gen3_dec" = "0x000c1641"
+
+	# Enable "Intel Speed Shift Technology"
+	register "speed_shift_enable" = "1"
+
+	# Disable DPTF
+	register "dptf_enable" = "0"
+
+	# FSP Configuration
+	register "ProbelessTrace" = "0"
+	register "EnableLan" = "0"
+	register "EnableSata" = "1"
+	register "SataSalpSupport" = "1"
+	register "SataMode" = "0"
+
+	# The X210 has 3 SATA ports: a full SATA port, mSATA, and SATA over M.2
+	register "SataPortsEnable[0]" = "1"
+	register "SataPortsEnable[1]" = "1"
+	register "SataPortsEnable[2]" = "1"
+	register "SataPortsDevSlp[0]" = "1"
+	register "SataPortsDevSlp[1]" = "1"
+	register "SataPortsDevSlp[2]" = "1"
+	register "SataPwrOptEnable" = "1"
+	register "EnableAzalia" = "1"
+	register "DspEnable" = "0"
+	register "IoBufferOwnership" = "0"
+	register "EnableTraceHub" = "0"
+	register "SsicPortEnable" = "0"
+	register "SmbusEnable" = "1"
+	register "Cio2Enable" = "0"
+	register "ScsEmmcEnabled" = "0"
+	register "ScsEmmcHs400Enabled" = "0"
+	register "ScsSdCardEnabled" = "0"
+	register "PttSwitch" = "0"
+	register "SkipExtGfxScan" = "1"
+	register "Device4Enable" = "1"
+	register "HeciEnabled" = "1"
+	register "SaGv" = "SaGv_Enabled"
+	register "PmConfigSlpS3MinAssert" = "2"		# 50ms
+	register "PmConfigSlpS4MinAssert" = "1"		# 1s
+	register "PmConfigSlpSusMinAssert" = "3"	# 500ms
+	register "PmConfigSlpAMinAssert" = "3"		# 2s
+	register "PmTimerDisabled" = "0"
+
+	register "serirq_mode" = "SERIRQ_CONTINUOUS"
+
+	register "pirqa_routing" = "PCH_IRQ11"
+	register "pirqb_routing" = "PCH_IRQ10"
+	register "pirqc_routing" = "PCH_IRQ11"
+	register "pirqd_routing" = "PCH_IRQ11"
+	register "pirqe_routing" = "PCH_IRQ11"
+	register "pirqf_routing" = "PCH_IRQ11"
+	register "pirqg_routing" = "PCH_IRQ11"
+	register "pirqh_routing" = "PCH_IRQ11"
+
+	register "PmConfigPciClockRun" = "1"
+
+	# Enable Root Ports 3, 4 and 9
+	register "PcieRpEnable[2]" = "1" # Ethernet controller
+	register "PcieRpClkReqSupport[2]" = "1"
+	register "PcieRpClkReqNumber[2]" = "0"
+	register "PcieRpClkSrcNumber[2]" = "0"
+	register "PcieRpAdvancedErrorReporting[2]" = "1"
+	register "PcieRpLtrEnable[2]" = "1"
+
+	register "PcieRpEnable[3]" = "1" # Wireless controller
+	register "PcieRpClkReqSupport[3]" = "1"
+	register "PcieRpClkReqNumber[3]" = "1"
+	register "PcieRpClkSrcNumber[3]" = "1"
+	register "PcieRpAdvancedErrorReporting[3]" = "1"
+	register "PcieRpLtrEnable[3]" = "1"
+
+	register "PcieRpEnable[8]" = "1" # NVMe controller
+	register "PcieRpClkReqSupport[8]" = "0"
+	register "PcieRpClkReqNumber[8]" = "2"
+	register "PcieRpClkSrcNumber[8]" = "2"
+	register "PcieRpAdvancedErrorReporting[8]" = "1"
+	register "PcieRpLtrEnable[8]" = "1"
+
+	register "usb2_ports[0]" = "USB2_PORT_MID(OC1)"		# Type-A Port (left)
+	register "usb2_ports[1]" = "USB2_PORT_MID(OC1)"		# Type-A Port (left)
+	register "usb2_ports[5]" = "USB2_PORT_MID(OC1)"		# Type-A Port (right)
+	register "usb2_ports[6]" = "USB2_PORT_FLEX(OC2)"	# Webcam
+	register "usb2_ports[7]" = "USB2_PORT_FLEX(OC2)"	# WiFi PCIe port USB
+
+	register "usb3_ports[0]" = "USB3_PORT_DEFAULT(OC1)"	# Type-A Port (left)
+	register "usb3_ports[1]" = "USB3_PORT_DEFAULT(OC1)"	# Type-A Port (left)
+	register "usb3_ports[5]" = "USB3_PORT_DEFAULT(OC1)"	# Type-A Port (right)
+
+	# PL1 override 25W
+	register "tdp_pl1_override" = "25"
+
+	# PL2 override 44W
+	register "tdp_pl2_override" = "44"
+
+	# Send an extra VR mailbox command for the PS4 exit issue
+	register "SendVrMbxCmd" = "2"
+
+	# Lock Down
+	register "common_soc_config" = "{
+		.chipset_lockdown = CHIPSET_LOCKDOWN_COREBOOT,
+	}"
+
+	device cpu_cluster 0 on
+		device lapic 0 on end
+	end
+	device domain 0 on
+		device pci 00.0 on  end # Host Bridge
+		device pci 02.0 on  end # Integrated Graphics Device
+		device pci 14.0 on  end # USB xHCI
+		device pci 14.1 off end # USB xDCI (OTG)
+		device pci 14.2 on  end # Thermal Subsystem
+		device pci 16.0 on  end # Management Engine Interface 1
+		device pci 16.1 off end # Management Engine Interface 2
+		device pci 16.2 off end # Management Engine IDE-R
+		device pci 16.3 off end # Management Engine KT Redirection
+		device pci 16.4 off end # Management Engine Interface 3
+		device pci 17.0 on  end # SATA
+		device pci 1c.0 off end # PCI Express Port 1
+		device pci 1c.1 off end # PCI Express Port 2
+		device pci 1c.2 on  end # PCI Express Port 3
+		device pci 1c.3 on  end # PCI Express Port 4
+		device pci 1c.4 off end # PCI Express Port 5
+		device pci 1c.5 off end # PCI Express Port 6
+		device pci 1c.6 off end # PCI Express Port 7
+		device pci 1c.7 off end # PCI Express Port 8
+		device pci 1d.0 on  end # PCI Express Port 9
+		device pci 1d.1 off end # PCI Express Port 10
+		device pci 1d.2 off end # PCI Express Port 11
+		device pci 1d.3 off end # PCI Express Port 12
+		device pci 1f.0 on
+			chip ec/51nb/npce985la0dx
+				device pnp 0c09.0 on end
+				device pnp 4e.5   on end
+				device pnp 4e.6   on end
+				device pnp 4e.11  on end
+			end
+		end # LPC Interface
+		device pci 1f.1 off end # P2SB
+		device pci 1f.2 on  end # Power Management Controller
+		device pci 1f.3 on  end # Intel HDA
+		device pci 1f.4 on  end # SMBus
+		device pci 1f.5 off end # PCH SPI
+		device pci 1f.6 off end # GbE
+	end
+end
diff --git a/src/mainboard/51nb/x210/dsdt.asl b/src/mainboard/51nb/x210/dsdt.asl
new file mode 100644
index 0000000000..441a80dd4a
--- /dev/null
+++ b/src/mainboard/51nb/x210/dsdt.asl
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* This file is part of the coreboot project. */
+
+#include <arch/acpi.h>
+
+DefinitionBlock(
+	"dsdt.aml",
+	"DSDT",
+	0x05,		// DSDT revision: ACPI v5.0
+	OEM_ID,
+	ACPI_TABLE_CREATOR,
+	0x20110725	// OEM revision
+)
+{
+	Name(\DSEN, 1)
+
+	#include "acpi/platform.asl"
+
+	#include <soc/intel/skylake/acpi/globalnvs.asl>
+
+	#include <cpu/intel/common/acpi/cpu.asl>
+
+	Device (\_SB.PCI0)
+	{
+		#include <soc/intel/skylake/acpi/systemagent.asl>
+		#include <soc/intel/skylake/acpi/pch.asl>
+		#include "acpi/graphics.asl"
+	}
+
+	#include <southbridge/intel/common/acpi/sleepstates.asl>
+
+	// Mainboard specific
+	#include "acpi/mainboard.asl"
+}
diff --git a/src/mainboard/51nb/x210/gpio.h b/src/mainboard/51nb/x210/gpio.h
new file mode 100644
index 0000000000..3e22ddee27
--- /dev/null
+++ b/src/mainboard/51nb/x210/gpio.h
@@ -0,0 +1,182 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* This file is part of the coreboot project. */
+
+#ifndef MAINBOARD_GPIO_H
+#define MAINBOARD_GPIO_H
+
+#include <soc/gpe.h>
+#include <soc/gpio.h>
+
+#ifndef __ACPI__
+
+/* Pad configuration in ramstage. */
+static const struct pad_config gpio_table[] = {
+/* RCIN# */_PAD_CFG_STRUCT(GPP_A0, 0x44000702, 0x0),
+/* LAD0 */_PAD_CFG_STRUCT(GPP_A1, 0x44000702, 0x3c00),
+/* LAD1 */_PAD_CFG_STRUCT(GPP_A2, 0x44000702, 0x3c00),
+/* LAD2 */_PAD_CFG_STRUCT(GPP_A3, 0x44000702, 0x3c00),
+/* LAD3 */_PAD_CFG_STRUCT(GPP_A4, 0x44000702, 0x3c00),
+/* LFRAME# */_PAD_CFG_STRUCT(GPP_A5, 0x44000700, 0x0),
+/* SERIRQ */_PAD_CFG_STRUCT(GPP_A6, 0x44000702, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_A7, 0x44000201, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_A8, 0x44000300, 0x3000),
+/* CLKOUT_LPC0 */_PAD_CFG_STRUCT(GPP_A9, 0x44000700, 0x1000),
+/* CLKOUT_LPC1 */_PAD_CFG_STRUCT(GPP_A10, 0x44000700, 0x1000),
+/* GPIO */_PAD_CFG_STRUCT(GPP_A11, 0x44000200, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_A12, 0x4000200, 0x0),
+/* SUSWARN#/SUSPWRDNACK */_PAD_CFG_STRUCT(GPP_A13, 0x44000700, 0x0),
+/* SUS_STAT# */_PAD_CFG_STRUCT(GPP_A14, 0x44000700, 0x0),
+/* SUS_ACK# */_PAD_CFG_STRUCT(GPP_A15, 0x44000702, 0x3000),
+/* CLKOUT_48 */_PAD_CFG_STRUCT(GPP_A16, 0x44000500, 0x0),
+/* ISH_GP7 */_PAD_CFG_STRUCT(GPP_A17, 0x44000700, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_A18, 0x44000300, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_A19, 0x44000300, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_A20, 0x44000300, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_A21, 0x44000300, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_A22, 0x44000201, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_A23, 0x44000100, 0x1000),
+/* n/a */_PAD_CFG_STRUCT(GPP_B0, 0x44000700, 0x0),
+/* n/a */_PAD_CFG_STRUCT(GPP_B1, 0x44000700, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_B2, 0x44000300, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_B3, 0x84000102, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_B4, 0x44000201, 0x0),
+/* SRCCLKREQ0# */_PAD_CFG_STRUCT(GPP_B5, 0x44000700, 0x0),
+/* SRCCLKREQ1# */_PAD_CFG_STRUCT(GPP_B6, 0x44000700, 0x0),
+/* SRCCLKREQ2# */_PAD_CFG_STRUCT(GPP_B7, 0x44000702, 0x0),
+/* SRCCLKREQ3# */_PAD_CFG_STRUCT(GPP_B8, 0x44000702, 0x0),
+/* SRCCLKREQ4# */_PAD_CFG_STRUCT(GPP_B9, 0x44000700, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_B10, 0x44000102, 0x0),
+/* n/a */_PAD_CFG_STRUCT(GPP_B11, 0x44000700, 0x0),
+/* SLP_S0# */_PAD_CFG_STRUCT(GPP_B12, 0x44000700, 0x0),
+/* PLTRST# */_PAD_CFG_STRUCT(GPP_B13, 0x44000700, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_B14, 0x44000201, 0x1000),
+/* GPIO */_PAD_CFG_STRUCT(GPP_B15, 0x44000300, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_B16, 0x84800102, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_B17, 0x84800102, 0x3000),
+/* GPIO */_PAD_CFG_STRUCT(GPP_B18, 0x84800102, 0x3000),
+/* GPIO */_PAD_CFG_STRUCT(GPP_B19, 0x44000300, 0x0),
+/* GSPI1_CLK */_PAD_CFG_STRUCT(GPP_B20, 0x44000700, 0x1000),
+/* GSPI1_MISO */_PAD_CFG_STRUCT(GPP_B21, 0x44000700, 0x1000),
+/* GSPIO_MOSI */_PAD_CFG_STRUCT(GPP_B22, 0x44000700, 0x1000),
+/* GPIO */_PAD_CFG_STRUCT(GPP_B23, 0x44000201, 0x1000),
+/* SMBCLK */_PAD_CFG_STRUCT(GPP_C0, 0x44000702, 0x0),
+/* SMBDATA */_PAD_CFG_STRUCT(GPP_C1, 0x44000702, 0x1000),
+/* GPIO */_PAD_CFG_STRUCT(GPP_C2, 0x44000201, 0x1000),
+/* SML0CLK */_PAD_CFG_STRUCT(GPP_C3, 0x44000702, 0x3000),
+/* SML0DATA */_PAD_CFG_STRUCT(GPP_C4, 0x44000702, 0x3000),
+/* GPIO */_PAD_CFG_STRUCT(GPP_C5, 0x44800100, 0x1000),
+/* RESERVED */_PAD_CFG_STRUCT(GPP_C6, 0xffffffff, 0xffffff00),
+/* RESERVED */_PAD_CFG_STRUCT(GPP_C7, 0xffffffff, 0xffffff00),
+/* UART0_RXD */_PAD_CFG_STRUCT(GPP_C8, 0x44000702, 0x3000),
+/* UART0_TXD */_PAD_CFG_STRUCT(GPP_C9, 0x44000700, 0x0),
+/* UART0_RTS# */_PAD_CFG_STRUCT(GPP_C10, 0x44000700, 0x0),
+/* UART0_CTS# */_PAD_CFG_STRUCT(GPP_C11, 0x44000702, 0x0),
+/* UART1_RXD */_PAD_CFG_STRUCT(GPP_C12, 0x44000702, 0x0),
+/* UART1_TXD */_PAD_CFG_STRUCT(GPP_C13, 0x44000700, 0x0),
+/* UART1_RTS# */_PAD_CFG_STRUCT(GPP_C14, 0x44000700, 0x0),
+/* UART1_CTS# */_PAD_CFG_STRUCT(GPP_C15, 0x44000702, 0x0),
+/* I2C0_SDA */_PAD_CFG_STRUCT(GPP_C16, 0x44000702, 0x3000),
+/* I2C0_SCL */_PAD_CFG_STRUCT(GPP_C17, 0x44000702, 0x3000),
+/* I2C1_SDA */_PAD_CFG_STRUCT(GPP_C18, 0x44000702, 0x3000),
+/* I2C1_SCL */_PAD_CFG_STRUCT(GPP_C19, 0x44000702, 0x3000),
+/* UART2_RXD */_PAD_CFG_STRUCT(GPP_C20, 0x44000702, 0x3000),
+/* UART2_TXD */_PAD_CFG_STRUCT(GPP_C21, 0x44000700, 0x0),
+/* UART2_RTS# */_PAD_CFG_STRUCT(GPP_C22, 0x44000700, 0x0),
+/* UART2_CTS# */_PAD_CFG_STRUCT(GPP_C23, 0x44000702, 0x0),
+/* n/a */_PAD_CFG_STRUCT(GPP_D0, 0x44000700, 0x0),
+/* n/a */_PAD_CFG_STRUCT(GPP_D1, 0x44000700, 0x0),
+/* n/a */_PAD_CFG_STRUCT(GPP_D2, 0x44000700, 0x0),
+/* n/a */_PAD_CFG_STRUCT(GPP_D3, 0x44000700, 0x0),
+/* ISH_I2C2_SDA */_PAD_CFG_STRUCT(GPP_D4, 0x44000700, 0x0),
+/* I2S_SFRM */_PAD_CFG_STRUCT(GPP_D5, 0x44000702, 0x3000),
+/* I2S_TXD */_PAD_CFG_STRUCT(GPP_D6, 0x44000702, 0x3000),
+/* I2S_RXD */_PAD_CFG_STRUCT(GPP_D7, 0x44000702, 0x3000),
+/* I2S_SCLK */_PAD_CFG_STRUCT(GPP_D8, 0x44000702, 0x3000),
+/* GPIO */_PAD_CFG_STRUCT(GPP_D9, 0x44000102, 0x3000),
+/* GPIO */_PAD_CFG_STRUCT(GPP_D10, 0x44000102, 0x3000),
+/* GPIO */_PAD_CFG_STRUCT(GPP_D11, 0x44000102, 0x3000),
+/* GPIO */_PAD_CFG_STRUCT(GPP_D12, 0x44000102, 0x3000),
+/* ISH_UART0_RXD */_PAD_CFG_STRUCT(GPP_D13, 0x44000702, 0x3000),
+/* ISH_UART0_TXD */_PAD_CFG_STRUCT(GPP_D14, 0x44000700, 0x3000),
+/* ISH_UART0_RTS# */_PAD_CFG_STRUCT(GPP_D15, 0x44000700, 0x0),
+/* ISH_UART0_CTS# */_PAD_CFG_STRUCT(GPP_D16, 0x44000702, 0x0),
+/* DMIC_CLK1 */_PAD_CFG_STRUCT(GPP_D17, 0x44000700, 0x0),
+/* DMIC_DATA1 */_PAD_CFG_STRUCT(GPP_D18, 0x44000700, 0x1000),
+/* DMIC_CLK0 */_PAD_CFG_STRUCT(GPP_D19, 0x44000700, 0x0),
+/* DMIC_DATA0 */_PAD_CFG_STRUCT(GPP_D20, 0x44000700, 0x1000),
+/* n/a */_PAD_CFG_STRUCT(GPP_D21, 0x44000700, 0x0),
+/* n/a */_PAD_CFG_STRUCT(GPP_D22, 0x44000700, 0x0),
+/* ISH_I2C2_SCL */_PAD_CFG_STRUCT(GPP_D23, 0x44000700, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_E0, 0x44000200, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_E1, 0x44800102, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_E2, 0x44000300, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_E3, 0x44000103, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_E4, 0x44000300, 0x0),
+/* SATA_DEVSLP1 */_PAD_CFG_STRUCT(GPP_E5, 0x4000700, 0x0),
+/* SATA_DEVSLP2 */_PAD_CFG_STRUCT(GPP_E6, 0x4000700, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_E7, 0x44000300, 0x0),
+/* SATA_LED# */_PAD_CFG_STRUCT(GPP_E8, 0x44000700, 0x0),
+/* USB_OC0# */_PAD_CFG_STRUCT(GPP_E9, 0x44000702, 0x0),
+/* USB_OC1# */_PAD_CFG_STRUCT(GPP_E10, 0x44000702, 0x0),
+/* USB_OC2# */_PAD_CFG_STRUCT(GPP_E11, 0x44000702, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_E12, 0x44000300, 0x0),
+/* n/a */_PAD_CFG_STRUCT(GPP_E13, 0x44000700, 0x0),
+/* n/a */_PAD_CFG_STRUCT(GPP_E14, 0x44000700, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_E15, 0x80880102, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_E16, 0x84000102, 0x0),
+/* n/a */_PAD_CFG_STRUCT(GPP_E17, 0x44000702, 0x0),
+/* n/a */_PAD_CFG_STRUCT(GPP_E18, 0x44000700, 0x3000),
+/* n/a */_PAD_CFG_STRUCT(GPP_E19, 0x44000700, 0x1000),
+/* n/a */_PAD_CFG_STRUCT(GPP_E20, 0x44000702, 0x3000),
+/* n/a */_PAD_CFG_STRUCT(GPP_E21, 0x44000702, 0x1000),
+/* GPIO */_PAD_CFG_STRUCT(GPP_E22, 0x44000000, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_E23, 0x44000201, 0x1000),
+/* BATLOW# */_PAD_CFG_STRUCT(GPD0, 0x4000702, 0x3000),
+/* ACPRESENT */_PAD_CFG_STRUCT(GPD1, 0x4000702, 0x0),
+/* LAN_WAKE# */_PAD_CFG_STRUCT(GPD2, 0x4000602, 0x3c00),
+/* PWRBTN# */_PAD_CFG_STRUCT(GPD3, 0x4000702, 0x3000),
+/* SLP_S3# */_PAD_CFG_STRUCT(GPD4, 0x4000700, 0x0),
+/* SLP_S4# */_PAD_CFG_STRUCT(GPD5, 0x4000700, 0x0),
+/* SLP_A# */_PAD_CFG_STRUCT(GPD6, 0x4000700, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPD7, 0x4000301, 0x0),
+/* SUSCLK */_PAD_CFG_STRUCT(GPD8, 0x4000700, 0x0),
+/* SLP_WLAN# */_PAD_CFG_STRUCT(GPD9, 0x4000700, 0x0),
+/* SLP_S5# */_PAD_CFG_STRUCT(GPD10, 0x4000700, 0x0),
+/* LANPHYPC */_PAD_CFG_STRUCT(GPD11, 0x4000700, 0x0),
+/* SATAXPCIE3 */_PAD_CFG_STRUCT(GPP_F0, 0x44000700, 0x0),
+/* SATAXPCIE4 */_PAD_CFG_STRUCT(GPP_F1, 0x44000700, 0x0),
+/* SATAXPCIE5 */_PAD_CFG_STRUCT(GPP_F2, 0x44000700, 0x0),
+/* SATAXPCIE6 */_PAD_CFG_STRUCT(GPP_F3, 0x44000700, 0x0),
+/* SATAXPCIE7 */_PAD_CFG_STRUCT(GPP_F4, 0x44000702, 0x2003000),
+/* SATA_DEVSLP3 */_PAD_CFG_STRUCT(GPP_F5, 0x44000702, 0x2003000),
+/* SATA_DEVSLP4 */_PAD_CFG_STRUCT(GPP_F6, 0x44000702, 0x2003000),
+/* SATA_DEVSLP5 */_PAD_CFG_STRUCT(GPP_F7, 0x44000702, 0x2003000),
+/* SATA_DEVSLP6 */_PAD_CFG_STRUCT(GPP_F8, 0x44000702, 0x2003000),
+/* SATA_DEVSLP7 */_PAD_CFG_STRUCT(GPP_F9, 0x44000702, 0x2003000),
+/* n/a */_PAD_CFG_STRUCT(GPP_F10, 0x44000b02, 0x2003000),
+/* n/a */_PAD_CFG_STRUCT(GPP_F11, 0x44000b02, 0x2003000),
+/* SATA_SDATAOUT1 */_PAD_CFG_STRUCT(GPP_F12, 0x44000700, 0x0),
+/* SATA_SDATAOUT2 */_PAD_CFG_STRUCT(GPP_F13, 0x44000700, 0x0),
+/* n/a */_PAD_CFG_STRUCT(GPP_F14, 0x44000700, 0x0),
+/* USB_OC4# */_PAD_CFG_STRUCT(GPP_F15, 0x44000700, 0x0),
+/* USB_OC5# */_PAD_CFG_STRUCT(GPP_F16, 0x44000700, 0x0),
+/* USB_OC6# */_PAD_CFG_STRUCT(GPP_F17, 0x44000700, 0x0),
+/* USB_OC7# */_PAD_CFG_STRUCT(GPP_F18, 0x44000700, 0x0),
+/* eDP_VDDEN */_PAD_CFG_STRUCT(GPP_F19, 0x44000700, 0x0),
+/* eDP_BKLTEN */_PAD_CFG_STRUCT(GPP_F20, 0x44000700, 0x0),
+/* eDP_BKLTCTL */_PAD_CFG_STRUCT(GPP_F21, 0x44000700, 0x0),
+/* n/a */_PAD_CFG_STRUCT(GPP_F22, 0x44000700, 0x0),
+/* GPIO */_PAD_CFG_STRUCT(GPP_F23, 0x44000102, 0x0),
+/* FAN_TACH_0 */_PAD_CFG_STRUCT(GPP_G0, 0x44000700, 0x0),
+/* FAN_TACH_1 */_PAD_CFG_STRUCT(GPP_G1, 0x44000700, 0x0),
+/* FAN_TACH_2 */_PAD_CFG_STRUCT(GPP_G2, 0x44000700, 0x0),
+/* FAN_TACH_3 */_PAD_CFG_STRUCT(GPP_G3, 0x44000700, 0x0),
+/* FAN_TACH_4 */_PAD_CFG_STRUCT(GPP_G4, 0x44000700, 0x0),
+/* FAN_TACH_5 */_PAD_CFG_STRUCT(GPP_G5, 0x44000702, 0x0),
+/* FAN_TACH_6 */_PAD_CFG_STRUCT(GPP_G6, 0x44000700, 0x0),
+/* FAN_TACH_7 */_PAD_CFG_STRUCT(GPP_G7, 0x44000700, 0x1000),
+};
+
+#endif
+
+#endif
diff --git a/src/mainboard/51nb/x210/hda_verb.c b/src/mainboard/51nb/x210/hda_verb.c
new file mode 100644
index 0000000000..973024a376
--- /dev/null
+++ b/src/mainboard/51nb/x210/hda_verb.c
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* This file is part of the coreboot project. */
+
+#include <device/azalia_device.h>
+
+const u32 cim_verb_data[] = {
+	/* coreboot specific header */
+	0x14f15069,	/* Codec Vendor / Device ID: Conexant CX20585 */
+	0x17aa2155,	/* Subsystem ID */
+	12,		/* Number of jacks (NID entries) */
+
+	0x0017ff00,	/* Function Reset */
+	0x0017ff00,	/* Double Function Reset */
+	0x0017ff00,
+	0x0017ff00,
+
+	/* Bits 31:28 - Codec Address */
+	/* Bits 27:20 - NID */
+	/* Bits 19:8 - Verb ID */
+	/* Bits 7:0  - Payload */
+
+	/* NID 0x01, HDA Codec Subsystem ID */
+	AZALIA_SUBVENDOR(0, 0x17aa2155),
+
+	/* Pin Widget Verb Table */
+	AZALIA_PIN_CFG(0, 0x19, 0x042140f0),
+	AZALIA_PIN_CFG(0, 0x1a, 0x61a190f0),
+	AZALIA_PIN_CFG(0, 0x1b, 0x04a190f0),
+	AZALIA_PIN_CFG(0, 0x1c, 0x612140f0),
+	AZALIA_PIN_CFG(0, 0x1d, 0x601700f0),
+	AZALIA_PIN_CFG(0, 0x1e, 0x40f001f0),
+	AZALIA_PIN_CFG(0, 0x1f, 0x901701f0),
+	AZALIA_PIN_CFG(0, 0x1B, 0x40f001f0),
+	AZALIA_PIN_CFG(0, 0x22, 0x40f001f0),
+	AZALIA_PIN_CFG(0, 0x23, 0x90a601f0),
+};
+
+const u32 pc_beep_verbs[] = {
+};
+AZALIA_ARRAY_SIZES;
diff --git a/src/mainboard/51nb/x210/mainboard.c b/src/mainboard/51nb/x210/mainboard.c
new file mode 100644
index 0000000000..4364dd1519
--- /dev/null
+++ b/src/mainboard/51nb/x210/mainboard.c
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* This file is part of the coreboot project. */
+
+#include <soc/ramstage.h>
+#include "gpio.h"
+
+void mainboard_silicon_init_params(FSP_SIL_UPD *params)
+{
+	/* Configure pads prior to SiliconInit() in case there's any
+	 * dependencies during hardware initialization. */
+	gpio_configure_pads(gpio_table, ARRAY_SIZE(gpio_table));
+}
+
+static void mainboard_enable(struct device *dev)
+{
+	/* Route 0x4e/4f to LPC */
+	lpc_enable_fixed_io_ranges(LPC_IOE_EC_4E_4F);
+}
+
+struct chip_operations mainboard_ops = {
+	.enable_dev = mainboard_enable,
+};
diff --git a/src/mainboard/51nb/x210/romstage.c b/src/mainboard/51nb/x210/romstage.c
new file mode 100644
index 0000000000..4ef10248c9
--- /dev/null
+++ b/src/mainboard/51nb/x210/romstage.c
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later  */
+/* This file is part of the coreboot project. */
+
+#include <string.h>
+#include <assert.h>
+#include <soc/romstage.h>
+#include <spd_bin.h>
+#include <arch/io.h>
+#include <string.h>
+
+static void mainboard_fill_rcomp_res_data(void *rcomp_ptr)
+{
+	/* Rcomp resistor */
+	const u16 RcompResistor[3] = { 121, 81, 100 };
+	memcpy(rcomp_ptr, RcompResistor, sizeof(RcompResistor));
+}
+
+static void mainboard_fill_rcomp_strength_data(void *rcomp_strength_ptr)
+{
+	/* Rcomp target */
+	const u16 RcompTarget[5] = { 100, 40, 20, 20, 26 };
+	memcpy(rcomp_strength_ptr, RcompTarget, sizeof(RcompTarget));
+}
+
+void mainboard_memory_init_params(FSPM_UPD *mupd)
+{
+	FSP_M_CONFIG *mem_cfg;
+	struct spd_block blk = {
+		.addr_map = { 0x50, 0x52 },
+	};
+
+	mem_cfg = &mupd->FspmConfig;
+
+	get_spd_smbus(&blk);
+	dump_spd_info(&blk);
+	assert(blk.spd_array[0][0] != 0);
+
+	mainboard_fill_rcomp_res_data(&mem_cfg->RcompResistor);
+	mainboard_fill_rcomp_strength_data(&mem_cfg->RcompTarget);
+
+	mem_cfg->DqPinsInterleaved = TRUE;
+	mem_cfg->MemorySpdDataLen = blk.len;
+	mem_cfg->MemorySpdPtr00 = (uintptr_t) blk.spd_array[0];
+	mem_cfg->MemorySpdPtr10 = (uintptr_t) blk.spd_array[1];
+}