mb/supermicro/x11-lga1151-series: add x11ssm-f board

This adds another x11 series board, the X11SSM-F, which is similiar to
X11SSH-TF but differs in PCIe interfaces/devices, GPIO settings and
Ethernet interfaces.

Change-Id: I24e6f0f41a844652f88b562285b26beef311a2c9
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35427
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Michael Niewöhner

12 files changed, 600 insertions, 0 deletions

diff --git a/Documentation/mainboard/supermicro/x11-lga1151-series/x11-lga1151-series.md b/Documentation/mainboard/supermicro/x11-lga1151-series/x11-lga1151-series.md
index 8c99527319..3ba4c3f3fa 100644
--- a/Documentation/mainboard/supermicro/x11-lga1151-series/x11-lga1151-series.md
+++ b/Documentation/mainboard/supermicro/x11-lga1151-series/x11-lga1151-series.md
@@ -7,6 +7,7 @@ Controller etc.
 ## Supported boards
 
 - [X11SSH-TF](x11ssh-tf/x11ssh-tf.md)
+- [X11SSM-F](x11ssh-tf/x11ssm-f.md)
 
 ## Required proprietary blobs
 
@@ -30,6 +31,7 @@ Look at the [flashing tutorial] and the board-specific section.
 These issues apply to all boards. Have a look at the board-specific issues, too.
 
 - TianoCore doesn't work with Aspeed NGI, as it's text mode only (Fix is WIP CB:35726)
+- MRC caching does not work with cold boot
 
 ## ToDo
 
diff --git a/Documentation/mainboard/supermicro/x11-lga1151-series/x11ssm-f/x11ssm-f.md b/Documentation/mainboard/supermicro/x11-lga1151-series/x11ssm-f/x11ssm-f.md
new file mode 100644
index 0000000000..5213bce6de
--- /dev/null
+++ b/Documentation/mainboard/supermicro/x11-lga1151-series/x11ssm-f/x11ssm-f.md
@@ -0,0 +1,93 @@
+# Supermicro X11SSM-F
+
+This section details how to run coreboot on the [Supermicro X11SSM-F].
+
+## Flashing coreboot
+
+The board can be flashed externally. FTDI FT2232H and FT232H based programmers worked.
+
+The flash IC [MX25L12873F] can be found near PCH PCIe Slot 4. It is socketed on retail boards.
+
+For doing ISP (In-System-Programming) one needs to add a diode between VCC and the flash chip.
+
+## BMC (IPMI)
+
+This board has an ASPEED [AST2400], which has BMC/[IPMI] functionality. The BMC firmware resides in a
+32 MiB SOIC-16 chip in the corner of the mainboard near the PCH PCIe Slot 4. This chip is a
+[MX25L25635F].
+
+## Tested and working
+
+- GRUB2 payload with Debian testing and kernel 5.2
+- ECC ram (Linux' ie31200 driver works)
+- USB ports
+- Ethernet
+- SATA ports
+- RS232 external
+- PCIe slots
+- BMC (IPMI)
+- VGA on Aspeed
+- TPM on TPM expansion header
+
+## Known issues
+
+- See general issue section
+- "only partially covers this bridge" info from Linux kernel (what does that mean?)
+- LNXTHERM missing
+- S3 resume not working
+
+## ToDo
+
+- Fix TODOs mentioned in code
+
+## Technology
+
+```eval_rst
++------------------+--------------------------------------------------+
+| CPU              | Intel Kaby Lake                                  |
++------------------+--------------------------------------------------+
+| PCH              | Intel C236                                       |
++------------------+--------------------------------------------------+
+| Coprocessor      | Intel SPS (server version of the ME)             |
++------------------+--------------------------------------------------+
+| Super I/O        | ASPEED AST2400                                   |
++------------------+--------------------------------------------------+
+| Ethernet         | 2x Intel I210-AT 1 GbE                           |
+|                  | 1x dedicated BMC                                 |
++------------------+--------------------------------------------------+
+| PCIe slots       | 1x 3.0 x8                                        |
+|                  | 1x 3.0 x8 (in x16)                               |
+|                  | 2x 3.0 x4 (in x8)                                |
++------------------+--------------------------------------------------+
+| USB slots        | 2x USB 2.0 (ext)                                 |
+|                  | 2x USB 3.0 (ext)                                 |
+|                  | 1x USB 3.0 (int)                                 |
+|                  | 1x dual USB 3.0 header                           |
+|                  | 2x dual USB 2.0 header                           |
++------------------+--------------------------------------------------+
+| SATA slots       | 8x S-ATA III                                     |
++------------------+--------------------------------------------------+
+| Other slots      | 1x RS232 (ext)                                   |
+|                  | 1x RS232 header                                  |
+|                  | 1x TPM header                                    |
+|                  | 1x Power SMB header                              |
+|                  | 5x PWM Fan connector                             |
+|                  | 2x I-SGPIO                                       |
+|                  | 2x S-ATA DOM Power connector                     |
+|                  | 1x XDP Port                                      |
+|                  | 1x External BMC I2C Header (for IPMI card)       |
+|                  | 1x Chassis Intrusion Header                      |
++------------------+--------------------------------------------------+
+```
+
+## Extra links
+
+- [Supermicro X11SSM-F]
+- [Board manual]
+
+[Supermicro X11SSM-F]: https://www.supermicro.com/en/products/motherboard/X11SSM-F
+[Board manual]: https://www.supermicro.com/manuals/motherboard/C236/MNL-1785.pdf
+[AST2400]: https://www.aspeedtech.com/products.php?fPath=20&rId=376
+[IPMI]: ../../../../drivers/ipmi_kcs.md
+[MX25L25635F]: https://media.digikey.com/pdf/Data%20Sheets/Macronix/MX25L25635F.pdf
+[MX25L12873F]: https://media.digikey.com/pdf/Data%20Sheets/Macronix/MX25L12873F.pdf
diff --git a/src/mainboard/supermicro/x11-lga1151-series/Kconfig b/src/mainboard/supermicro/x11-lga1151-series/Kconfig
index 541b23d5b5..329cfd9746 100644
--- a/src/mainboard/supermicro/x11-lga1151-series/Kconfig
+++ b/src/mainboard/supermicro/x11-lga1151-series/Kconfig
@@ -22,6 +22,7 @@ config MAINBOARD_FAMILY
 config MAINBOARD_PART_NUMBER
 	string
 	default "X11SSH-TF"	if BOARD_SUPERMICRO_X11SSH_TF
+	default "X11SSM-F"	if BOARD_SUPERMICRO_X11SSM_F
 
 config MAINBOARD_DIR
 	string
@@ -30,6 +31,7 @@ config MAINBOARD_DIR
 config VARIANT_DIR
 	string
 	default "x11ssh-tf"	if BOARD_SUPERMICRO_X11SSH_TF
+	default "x11ssm-f"	if BOARD_SUPERMICRO_X11SSM_F
 
 config OVERRIDE_DEVICETREE
 	string
diff --git a/src/mainboard/supermicro/x11-lga1151-series/Kconfig.name b/src/mainboard/supermicro/x11-lga1151-series/Kconfig.name
index ec01b135f8..7b2eaaffcb 100644
--- a/src/mainboard/supermicro/x11-lga1151-series/Kconfig.name
+++ b/src/mainboard/supermicro/x11-lga1151-series/Kconfig.name
@@ -1,3 +1,7 @@
 config BOARD_SUPERMICRO_X11SSH_TF
 	bool "X11SSH-TF"
 	select BOARD_SUPERMICRO_BASEBOARD_X11_LGA1151_SERIES
+
+config BOARD_SUPERMICRO_X11SSM_F
+	bool "X11SSM-F"
+	select BOARD_SUPERMICRO_BASEBOARD_X11_LGA1151_SERIES
diff --git a/src/mainboard/supermicro/x11-lga1151-series/Makefile.inc b/src/mainboard/supermicro/x11-lga1151-series/Makefile.inc
index a6d789e11c..cab662a4bf 100644
--- a/src/mainboard/supermicro/x11-lga1151-series/Makefile.inc
+++ b/src/mainboard/supermicro/x11-lga1151-series/Makefile.inc
@@ -18,5 +18,7 @@ bootblock-y += bootblock.c
 
 ramstage-y += ramstage.c
 
+CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/include
+
 subdirs-y += variants/$(VARIANT_DIR)
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/variants/$(VARIANT_DIR)/include
diff --git a/src/mainboard/supermicro/x11-lga1151-series/include/mainboard.h b/src/mainboard/supermicro/x11-lga1151-series/include/mainboard.h
new file mode 100644
index 0000000000..a2047d4cdf
--- /dev/null
+++ b/src/mainboard/supermicro/x11-lga1151-series/include/mainboard.h
@@ -0,0 +1,21 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * 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.
+ */
+
+#ifndef _BASEBOARD_X11_LGA1151_SERIES_H
+#define _BASEBOARD_X11_LGA1151_SERIES_H
+
+#include <device/device.h>
+
+void variant_mainboard_init(struct device *dev);
+
+#endif /* _BASEBOARD_X11_LGA1151_SERIES_H */
diff --git a/src/mainboard/supermicro/x11-lga1151-series/mainboard.c b/src/mainboard/supermicro/x11-lga1151-series/mainboard.c
new file mode 100644
index 0000000000..750c8561a6
--- /dev/null
+++ b/src/mainboard/supermicro/x11-lga1151-series/mainboard.c
@@ -0,0 +1,41 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ * Copyright (C) 2013 Google Inc.
+ * Copyright (C) 2016 Intel Corporation.
+ *
+ * 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.
+ */
+
+#include <mainboard.h>
+#include <device/device.h>
+
+__weak void variant_mainboard_init(struct device *dev)
+{
+}
+
+static void mainboard_init(struct device *dev)
+{
+	/* do common init */
+	// placeholder for common mainboard initialization
+
+	/* do variant init */
+	variant_mainboard_init(dev);
+}
+
+static void mainboard_enable(struct device *dev)
+{
+	dev->ops->init = mainboard_init;
+}
+
+struct chip_operations mainboard_ops = {
+	.enable_dev = mainboard_enable,
+};
diff --git a/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssm-f/Makefile.inc b/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssm-f/Makefile.inc
new file mode 100644
index 0000000000..f3c87b2318
--- /dev/null
+++ b/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssm-f/Makefile.inc
@@ -0,0 +1 @@
+ramstage-y += mainboard.c
diff --git a/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssm-f/board_info.txt b/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssm-f/board_info.txt
new file mode 100644
index 0000000000..a914412ad9
--- /dev/null
+++ b/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssm-f/board_info.txt
@@ -0,0 +1,7 @@
+Category: server
+Vendor name: Supermicro
+Board name: X11SSM-F
+Board URL: https://www.supermicro.com/en/products/motherboard/X11SSM-F
+ROM protocol: SPI
+ROM socketed: y
+Flashrom support: y
diff --git a/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssm-f/include/variant/gpio.h b/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssm-f/include/variant/gpio.h
new file mode 100644
index 0000000000..6a25128c5a
--- /dev/null
+++ b/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssm-f/include/variant/gpio.h
@@ -0,0 +1,269 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2018 Intel Corporation.
+ *
+ * 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.
+ */
+
+#ifndef _GPIO_X11SSM_F_H
+#define _GPIO_X11SSM_F_H
+
+#include <soc/gpe.h>
+#include <soc/gpio.h>
+
+static const struct pad_config gpio_table[] = {
+	/* GPIO Group GPP_A */
+	_PAD_CFG_STRUCT(GPP_A0,  0x44000700, 0x00000010), /* RCIN# */
+	_PAD_CFG_STRUCT(GPP_A1,  0x44000700, 0x00000010), /* LAD0 */
+	_PAD_CFG_STRUCT(GPP_A2,  0x44000700, 0x00000010), /* LAD1 */
+	_PAD_CFG_STRUCT(GPP_A3,  0x44000700, 0x00000010), /* LAD2 */
+	_PAD_CFG_STRUCT(GPP_A4,  0x44000700, 0x00000010), /* LAD3 */
+	_PAD_CFG_STRUCT(GPP_A5,  0x44000700, 0x00000010), /* LFRAME# */
+	_PAD_CFG_STRUCT(GPP_A6,  0x44000700, 0x00000010), /* SERIRQ */
+	_PAD_CFG_STRUCT(GPP_A7,  0x44000700, 0x00000010), /* PIRQA# */
+	_PAD_CFG_STRUCT(GPP_A8,  0x44000700, 0x00000010), /* CLKRUN# */
+	_PAD_CFG_STRUCT(GPP_A9,  0x44000700, 0x00000010), /* CLKOUT_LPC0 */
+	_PAD_CFG_STRUCT(GPP_A10, 0x44000700, 0x00000010), /* CLKOUT_LPC1 */
+	_PAD_CFG_STRUCT(GPP_A11, 0x44000700, 0x00000010), /* PME# */
+	_PAD_CFG_STRUCT(GPP_A12, 0x84000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_A13, 0x44000700, 0x00000010), /* SUSWARN#/SUSPWRDNACK */
+	_PAD_CFG_STRUCT(GPP_A14, 0x44000700, 0x00000010), /* SUS_STAT# */
+	_PAD_CFG_STRUCT(GPP_A15, 0x44000700, 0x00000010), /* SUS_ACK# */
+	_PAD_CFG_STRUCT(GPP_A16, 0x44000700, 0x00000010), /* CLKOUT_48 */
+	_PAD_CFG_STRUCT(GPP_A17, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_A18, 0x84000100, 0x00000010), /* GPIO */
+	/* reserved */
+	//_PAD_CFG_STRUCT(GPP_A19, 0xffffffff, 0xffffffff), /* ISH_GP1 */
+	_PAD_CFG_STRUCT(GPP_A20, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_A21, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_A22, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_A23, 0x44000300, 0x00000010), /* GPIO */
+
+	/* GPIO Group GPP_B */
+	_PAD_CFG_STRUCT(GPP_B0,  0x44000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B1,  0x44000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B2,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B3,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B4,  0x44000301, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B5,  0x44000301, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B6,  0x84000301, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B7,  0x44000301, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B8,  0x44000301, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B9,  0x44000301, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B10, 0x44000301, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B11, 0x44000200, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B12, 0x44000700, 0x00000010), /* SLP_S0# */
+	_PAD_CFG_STRUCT(GPP_B13, 0x44000700, 0x00000010), /* PLTRST# */
+	_PAD_CFG_STRUCT(GPP_B14, 0x84000700, 0x00000010), /* SPKR */
+	_PAD_CFG_STRUCT(GPP_B15, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B16, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B17, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B18, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B19, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B20, 0x84000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B21, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B22, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_B23, 0x40000b00, 0x00000010), /* PCHHOT# */
+
+	/* GPIO Group GPP_C */
+	/* reserved */
+	//_PAD_CFG_STRUCT(GPP_C0,  0x44000700, 0x00000010), /* SMBCLK */
+	//_PAD_CFG_STRUCT(GPP_C1,  0x44000700, 0x00000010), /* SMBDATA */
+	_PAD_CFG_STRUCT(GPP_C2,  0x44000300, 0x00000010), /* GPIO */
+	/* reserved */
+	//_PAD_CFG_STRUCT(GPP_C3,  0x44000700, 0x00000010), /* SML0CLK */
+	//_PAD_CFG_STRUCT(GPP_C4,  0x44000700, 0x00000010), /* SML0DATA */
+	_PAD_CFG_STRUCT(GPP_C5,  0x44000201, 0x00000010), /* GPIO */
+	/* reserved */
+	//_PAD_CFG_STRUCT(GPP_C6,  0x44000700, 0x00000010), /* SML1CLK */
+	//_PAD_CFG_STRUCT(GPP_C7,  0x44000700, 0x00000010), /* SML1DATA */
+	_PAD_CFG_STRUCT(GPP_C8,  0x84000100, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_C9,  0x84000100, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_C10, 0x84000100, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_C11, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_C12, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_C13, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_C14, 0x84000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_C15, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_C16, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_C17, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_C18, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_C19, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_C20, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_C21, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_C22, 0x42040100, 0x00003010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_C23, 0x84000300, 0x00000010), /* GPIO */
+
+	/* GPIO Group GPP_D */
+	_PAD_CFG_STRUCT(GPP_D0,  0x84000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D1,  0x44000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D2,  0x42020100, 0x00003000), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D3,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D4,  0x84000200, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D5,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D6,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D7,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D8,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D9,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D10, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D11, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D12, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D13, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D14, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D15, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D16, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D17, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D18, 0x84000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D19, 0x84000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D20, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D21, 0x44000200, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D22, 0x04000100, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_D23, 0x44000300, 0x00000010), /* GPIO */
+
+	/* GPIO Group GPP_E */
+	_PAD_CFG_STRUCT(GPP_E0,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_E1,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_E2,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_E3,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_E4,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_E5,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_E6,  0x82020100, 0x00003000), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_E7,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_E8,  0x44000700, 0x00000010), /* SATA_LED# */
+	_PAD_CFG_STRUCT(GPP_E9,  0x44000700, 0x00000010), /* USB_OC0# */
+	_PAD_CFG_STRUCT(GPP_E10, 0x44000700, 0x00000010), /* USB_OC1# */
+	_PAD_CFG_STRUCT(GPP_E11, 0x44000700, 0x00000010), /* USB_OC2# */
+	_PAD_CFG_STRUCT(GPP_E12, 0x44000700, 0x00000010), /* USB_OC3# */
+
+	/* GPIO Group GPP_F */
+	_PAD_CFG_STRUCT(GPP_F0,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F1,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F2,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F3,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F4,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F5,  0x80100100, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F6,  0x84000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F7,  0x84000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F8,  0x84000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F9,  0x84000100, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F10, 0x44000700, 0x00000010), /* SATA_SCLOCK */
+	_PAD_CFG_STRUCT(GPP_F11, 0x44000700, 0x00000010), /* SATA_SLOAD */
+	_PAD_CFG_STRUCT(GPP_F12, 0x44000700, 0x00000010), /* SATA_SDATAOUT1 */
+	_PAD_CFG_STRUCT(GPP_F13, 0x44000700, 0x00000010), /* SATA_SDATAOUT2 */
+	_PAD_CFG_STRUCT(GPP_F14, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F15, 0x44000700, 0x00000010), /* USB_OC4# */
+	_PAD_CFG_STRUCT(GPP_F16, 0x44000700, 0x00000010), /* USB_OC5# */
+	_PAD_CFG_STRUCT(GPP_F17, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F18, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F19, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F20, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F21, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F22, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_F23, 0x04000200, 0x00000010), /* GPIO */
+
+	/* GPIO Group GPP_G */
+	_PAD_CFG_STRUCT(GPP_G0,  0x44000100, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G1,  0x44000100, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G2,  0x44000100, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G3,  0x44000100, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G4,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G5,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G6,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G7,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G8,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G9,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G10, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G11, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G12, 0x84000100, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G13, 0x84000100, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G14, 0x84000100, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G15, 0x84000100, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G16, 0x84000100, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G17, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G18, 0x44000700, 0x00000010), /* NMI# */
+	_PAD_CFG_STRUCT(GPP_G19, 0x44000700, 0x00000010), /* SMI# */
+	_PAD_CFG_STRUCT(GPP_G20, 0x44000300, 0x00000000), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G21, 0x44000300, 0x00000000), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G22, 0x44000300, 0x00000000), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_G23, 0x44000300, 0x00000010), /* GPIO */
+
+	/* GPIO Group GPP_H */
+	_PAD_CFG_STRUCT(GPP_H0,  0x44000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H1,  0x84000101, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H2,  0x44000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H3,  0x44000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H4,  0x84000101, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H5,  0x84000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H6,  0x84000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H7,  0x84000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H8,  0x84000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H9,  0x84000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H10, 0x44000700, 0x00000010), /* SML2CLK */
+	_PAD_CFG_STRUCT(GPP_H11, 0x44000700, 0x00000010), /* SML2DATA */
+	_PAD_CFG_STRUCT(GPP_H12, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H13, 0x44000700, 0x00000010), /* SML3CLK */
+	_PAD_CFG_STRUCT(GPP_H14, 0x44000700, 0x00000010), /* SML3DATA */
+	_PAD_CFG_STRUCT(GPP_H15, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H16, 0x44000700, 0x00000010), /* SML4CLK */
+	_PAD_CFG_STRUCT(GPP_H17, 0x44000700, 0x00000010), /* SML4DATA */
+	_PAD_CFG_STRUCT(GPP_H18, 0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H19, 0x84000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H20, 0x84000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H21, 0x84000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H22, 0x84000201, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_H23, 0x84000201, 0x00000010), /* GPIO */
+
+	/* GPIO Group GPP_I */
+	_PAD_CFG_STRUCT(GPP_I0,  0x44000700, 0x00000010), /* DDPB_HPD0 */
+	_PAD_CFG_STRUCT(GPP_I1,  0x44000700, 0x00000010), /* DDPC_HPD1 */
+	_PAD_CFG_STRUCT(GPP_I2,  0x44000700, 0x00000010), /* DDPD_HPD2 */
+	_PAD_CFG_STRUCT(GPP_I3,  0x84000700, 0x00000010), /* DDPE_HPD3 */
+	_PAD_CFG_STRUCT(GPP_I4,  0x44000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPP_I5,  0x44000700, 0x00000010), /* DDPB_CTRLCLK */
+	_PAD_CFG_STRUCT(GPP_I6,  0x44000700, 0x00000010), /* DDPB_CTRLDATA */
+	_PAD_CFG_STRUCT(GPP_I7,  0x44000700, 0x00000010), /* DDPC_CTRLCLK */
+	_PAD_CFG_STRUCT(GPP_I8,  0x44000700, 0x00000010), /* DDPC_CTRLDATA */
+	_PAD_CFG_STRUCT(GPP_I9,  0x44000700, 0x00000010), /* DDPD_CTRLCLK */
+	_PAD_CFG_STRUCT(GPP_I10, 0x44000700, 0x00000010), /* DDPD_CTRLDATA */
+
+	/* GPIO Group GPD */
+	_PAD_CFG_STRUCT(GPD0,    0x04000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPD1,    0x04000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPD2,    0x04000700, 0x00000010), /* LAN_WAKE# */
+	_PAD_CFG_STRUCT(GPD3,    0x04000700, 0x00000010), /* PWRBTN# */
+	_PAD_CFG_STRUCT(GPD4,    0x04000700, 0x00000010), /* SLP_S3# */
+	_PAD_CFG_STRUCT(GPD5,    0x04000700, 0x00000010), /* SLP_S4# */
+	_PAD_CFG_STRUCT(GPD6,    0x04000700, 0x00000010), /* SLP_A# */
+	_PAD_CFG_STRUCT(GPD7,    0x04000301, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPD8,    0x04000700, 0x00000010), /* SUSCLK */
+	_PAD_CFG_STRUCT(GPD9,    0x04000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPD10,   0x04000300, 0x00000010), /* GPIO */
+	_PAD_CFG_STRUCT(GPD11,   0x04000300, 0x00000010), /* GPIO */
+};
+
+/* Early pad configuration in romstage. */
+static const struct pad_config early_gpio_table[] = {
+	/* GPIO Group GPP_A */
+	/* LPC */
+	_PAD_CFG_STRUCT(GPP_A1,  0x44000700, 0x00000010), /* LAD0 */
+	_PAD_CFG_STRUCT(GPP_A2,  0x44000700, 0x00000010), /* LAD1 */
+	_PAD_CFG_STRUCT(GPP_A3,  0x44000700, 0x00000010), /* LAD2 */
+	_PAD_CFG_STRUCT(GPP_A4,  0x44000700, 0x00000010), /* LAD3 */
+	_PAD_CFG_STRUCT(GPP_A5,  0x44000700, 0x00000010), /* LFRAME# */
+	_PAD_CFG_STRUCT(GPP_A8,  0x44000700, 0x00000010), /* CLKRUN# */
+	_PAD_CFG_STRUCT(GPP_A9,  0x44000700, 0x00000010), /* CLKOUT_LPC0 */
+	_PAD_CFG_STRUCT(GPP_A10, 0x44000700, 0x00000010), /* CLKOUT_LPC1 */
+
+	/* Serial interrupt */
+	_PAD_CFG_STRUCT(GPP_A6,  0x44000700, 0x00000010), /* SERIRQ */
+};
+
+#endif /* _GPIO_X11SSM_F_H */
diff --git a/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssm-f/mainboard.c b/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssm-f/mainboard.c
new file mode 100644
index 0000000000..7cf8883dd6
--- /dev/null
+++ b/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssm-f/mainboard.c
@@ -0,0 +1,34 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * 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.
+ */
+
+#include <mainboard.h>
+#include <device/device.h>
+#include <intelblocks/itss.h>
+#include <intelblocks/pcr.h>
+#include <soc/itss.h>
+#include <soc/pcr_ids.h>
+
+void variant_mainboard_init(struct device *dev)
+{
+	/* TODO:
+	* Find out why the polarities from gpio.h gets overwritten by FSP.
+	* This sets irq polarity to the same values as vendor
+	* but I do not know if this is really needed....
+	*/
+	itss_set_irq_polarity(33, 0);
+	itss_set_irq_polarity(34, 0);
+
+	// TODO: NMI; is this needed? vendor sets it
+	pcr_write32(0xae, 0x01e4, 0x00000004);
+	pcr_write32(0xae, 0x01e8, 0x00000040);
+}
diff --git a/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssm-f/overridetree.cb b/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssm-f/overridetree.cb
new file mode 100644
index 0000000000..ea90e0b0ba
--- /dev/null
+++ b/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssm-f/overridetree.cb
@@ -0,0 +1,124 @@
+chip soc/intel/skylake
+
+	# 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_G"
+	register "gpe0_dw1" = "GPP_D"
+	register "gpe0_dw2" = "GPP_E"
+
+	register "gen1_dec" = "0x007c0a01"	# Super IO SWC
+	register "gen2_dec" = "0x000c0ca1"	# IPMI KCS
+	register "gen3_dec" = "0x000c03e1"	# UART3
+	register "gen4_dec" = "0x000c02e1"	# UART4
+
+	# PCIe configuration
+	register "PcieRpEnable[0]" 	= "1"	# Enable PCH PCIe Port 1 / PCH SLOT4
+	register "PcieRpEnable[4]" 	= "1"	# Enable PCH PCIe Port 5 / PCH SLOT5
+	register "PcieRpEnable[8]" 	= "1"	# Enable PCH PCIe Port 9 / GbE 1
+	register "PcieRpEnable[9]" 	= "1"	# Enable PCH PCIe Port 10 / GbE 2
+	register "PcieRpEnable[10]" 	= "1"	# Enable PCH PCIe Port 11 / Aspeed 2400 VGA
+
+	# USB configuration
+	# USB0/1
+	register "usb2_ports[5]"	= "USB2_PORT_MID(OC2)"
+	register "usb2_ports[4]"	= "USB2_PORT_MID(OC2)"
+
+	# USB2/3
+	register "usb2_ports[3]"	= "USB2_PORT_MID(OC1)"
+	register "usb2_ports[2]"	= "USB2_PORT_MID(OC1)"
+
+	# USB4/5
+	register "usb2_ports[7]"	= "USB2_PORT_MID(OC0)"
+	register "usb2_ports[6]"	= "USB2_PORT_MID(OC0)"
+
+	# USB6/7 (USB3.0)
+	register "usb2_ports[11]"	= "USB2_PORT_MID(OC4)"
+	register "usb3_ports[1]"	= "USB3_PORT_DEFAULT(OC4)"
+	register "usb2_ports[10]"	= "USB2_PORT_MID(OC4)"
+	register "usb3_ports[0]"	= "USB3_PORT_DEFAULT(OC4)"
+
+	# USB8/9 (USB3.0)
+	register "usb2_ports[1]"	= "USB2_PORT_MID(OC3)"
+	register "usb3_ports[4]"	= "USB3_PORT_DEFAULT(OC3)"
+	register "usb2_ports[0]"	= "USB2_PORT_MID(OC3)"
+	register "usb3_ports[3]"	= "USB3_PORT_DEFAULT(OC3)"
+
+	# USB10 (USB3.0)
+	register "usb2_ports[9]"	= "USB2_PORT_MID(OC5)"
+	register "usb3_ports[2]"	= "USB3_PORT_DEFAULT(OC5)"
+
+	# IPMI USB HUB
+	register "usb2_ports[8]"	= "USB2_PORT_MID(OC_SKIP)"
+
+	device domain 0 on
+		device pci 01.0 on	# CPU PCIe Port (x16) / PCIe Slot 6 (JPCIE6)
+			smbios_slot_desc "SlotTypePciExpressGen3X16" "SlotLengthLong" "CPU SLOT6 PCI-E 3.0 X8(IN X16)" "SlotDataBusWidth8X"
+		end
+		device pci 01.1 on	# CPU PCIe Port (x8) / PCIe Slot 7 (JPCIE7)
+			smbios_slot_desc "SlotTypePciExpressGen3X8" "SlotLengthShort" "CPU SLOT7 PCI-E 3.0 X8" "SlotDataBusWidth8X"
+		end
+		device pci 1c.0 on	# PCH PCIe Port 1 / PCIe Slot 4 (JPCIE4)
+			smbios_slot_desc "SlotTypePciExpressGen3X8" "SlotLengthShort" "PCH SLOT4 PCI-E 3.0 X4(IN X8)" "SlotDataBusWidth4X"
+		end
+		device pci 1c.4 on	# PCH PCIe Port 5 / PCIe Slot 5 (JPCIE5)
+			smbios_slot_desc "SlotTypePciExpressGen3X8" "SlotLengthShort" "PCH SLOT5 PCI-E 3.0 X4(IN X8)" "SlotDataBusWidth4X"
+		end
+		device pci 1d.0 on	# PCH PCIe Port 9
+			device pci 00.0 on end	# GbE 1
+		end
+		device pci 1d.1 on	# PCH PCIe Port 10
+			device pci 00.1 on end	# GbE 2
+		end
+		device pci 1d.2 on	# PCH PCIe Port 11
+			device pci 00.0 on	# Aspeed PCI Bridge
+				device pci 00.0 on end	# Aspeed 2400 VGA
+			end
+		end
+		device pci 1f.0 on	# LPC Interface
+			chip drivers/ipmi
+				# On cold boot it takes a while for the BMC to start the IPMI service
+				register "wait_for_bmc" = "1"
+				register "bmc_boot_timeout" = "60"
+				device pnp ca2.0 on end	# IPMI KCS
+			end
+			chip superio/common
+				device pnp 2e.0 on
+					chip superio/aspeed/ast2400
+						device pnp 2e.2 on	# SUART1 / COM1 (ext)
+							io 0x60 = 0x3f8
+							irq 0x70 = 4
+						end
+						device pnp 2e.3 on	# SUART2 / COM2 (int)
+							io 0x60 = 0x2f8
+							irq 0x70 = 3
+						end
+						device pnp 2e.4 on	# SWC
+							io 0x60 = 0xa00
+							io 0x62 = 0xa10
+							io 0x64 = 0xa20
+							io 0x66 = 0xa30
+							irq 0x70 = 0xb
+						end
+						device pnp 2e.5 off end	# KBC
+						device pnp 2e.7 on  end	# GPIO
+						device pnp 2e.b on	# SUART3
+							io 0x60 = 0x3e8
+							irq 0x70 = 4
+						end
+						device pnp 2e.c on	# SUART4
+							io 0x60 = 0x2e8
+							irq 0x70 = 3
+						end
+						device pnp 2e.d on end	# iLPC2AHB
+						device pnp 2e.e on	# Mailbox
+							io 0x60 = 0xa40
+							irq 0x70 = 0x00
+						end
+					end
+				end
+			end
+		end
+	end
+end