imx8mn_var_som: Add support for Variscite VAR-SOM-MX8M-NANO board

Add support for iMX8MN VAR-SOM-MX8M-NANO board. Enables support for:

- 1GiB DDR4 RAM
- 16 GiB eMMC
- SD card
- Gigabit ethernet
- USBOTG1 peripheral - fastboot

Signed-off-by: Ariel D'Alessandro <ariel.dalessandro@collabora.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>

7 files changed, 697 insertions, 0 deletions

diff --git a/board/variscite/imx8mn_var_som/Kconfig b/board/variscite/imx8mn_var_som/Kconfig
new file mode 100644
index 0000000..cfe6fc8
--- /dev/null
+++ b/board/variscite/imx8mn_var_som/Kconfig
@@ -0,0 +1,17 @@
+if TARGET_IMX8MN_VAR_SOM
+
+config SYS_BOARD
+	default "imx8mn_var_som"
+
+config SYS_VENDOR
+	default "variscite"
+
+config SYS_CONFIG_NAME
+	default "imx8mn_var_som"
+
+config IMX_CONFIG
+	default "board/variscite/imx8mn_var_som/imximage-8mn-ddr4.cfg"
+
+source "board/freescale/common/Kconfig"
+
+endif
diff --git a/board/variscite/imx8mn_var_som/MAINTAINERS b/board/variscite/imx8mn_var_som/MAINTAINERS
new file mode 100644
index 0000000..068f807
--- /dev/null
+++ b/board/variscite/imx8mn_var_som/MAINTAINERS
@@ -0,0 +1,7 @@
+ARM i.MX8MN VARISCITE VAR-SOM-MX8MN MODULE
+M:	Ariel D'Alessandro <ariel.dalessandro@collabora.com>
+S:	Maintained
+F:	arch/arm/dts/imx8mn-var-som*
+F:	board/variscite/imx8mn_var_som/
+F:	configs/imx8mn_var_som_defconfig
+F:	include/configs/imx8mn_var_som.h
diff --git a/board/variscite/imx8mn_var_som/Makefile b/board/variscite/imx8mn_var_som/Makefile
new file mode 100644
index 0000000..a8b6a34
--- /dev/null
+++ b/board/variscite/imx8mn_var_som/Makefile
@@ -0,0 +1,12 @@
+#
+# Copyright 2021 Collabora Ltd.
+#
+# SPDX-License-Identifier:      GPL-2.0+
+#
+
+obj-y += imx8mn_var_som.o
+
+ifdef CONFIG_SPL_BUILD
+obj-y += spl.o
+obj-y += ddr4_timing.o
+endif
diff --git a/board/variscite/imx8mn_var_som/ddr4_timing.c b/board/variscite/imx8mn_var_som/ddr4_timing.c
new file mode 100644
index 0000000..0ed69ee
--- /dev/null
+++ b/board/variscite/imx8mn_var_som/ddr4_timing.c
@@ -0,0 +1,528 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2019 NXP
+ *
+ * Generated code from MX8M_DDR_tool
+ * Align with uboot version:
+ * imx_v2018.03_4.14.78_1.0.0_ga ~ imx_v2018.04_4.19.35_1.0.0_ga
+ */
+
+#include <linux/kernel.h>
+#include <asm/arch/ddr.h>
+
+static struct dram_cfg_param ddr_ddrc_cfg[] = {
+	/** Initialize DDRC registers **/
+	{ 0x3d400000, 0x81040010 },
+	{ 0x3d400030, 0x20 },
+	{ 0x3d400034, 0x221306 },
+	{ 0x3d400050, 0x210070 },
+	{ 0x3d400054, 0x10008 },
+	{ 0x3d400060, 0x0 },
+	{ 0x3d400064, 0x9200d2 },
+	{ 0x3d4000c0, 0x0 },
+	{ 0x3d4000c4, 0x1000 },
+	{ 0x3d4000d0, 0xc0030126 },
+	{ 0x3d4000d4, 0x770000 },
+	{ 0x3d4000dc, 0x8340105 },
+	{ 0x3d4000e0, 0x180200 },
+	{ 0x3d4000e4, 0x110000 },
+	{ 0x3d4000e8, 0x2000600 },
+	{ 0x3d4000ec, 0x810 },
+	{ 0x3d4000f0, 0x20 },
+	{ 0x3d4000f4, 0xec7 },
+	{ 0x3d400100, 0x11122914 },
+	{ 0x3d400104, 0x4051c },
+	{ 0x3d400108, 0x608050d },
+	{ 0x3d40010c, 0x400c },
+	{ 0x3d400110, 0x8030409 },
+	{ 0x3d400114, 0x6060403 },
+	{ 0x3d40011c, 0x606 },
+	{ 0x3d400120, 0x5050d08 },
+	{ 0x3d400124, 0x2040a },
+	{ 0x3d40012c, 0x1409010e },
+	{ 0x3d400130, 0x8 },
+	{ 0x3d40013c, 0x0 },
+	{ 0x3d400180, 0x1000040 },
+	{ 0x3d400184, 0x493e },
+	{ 0x3d400190, 0x38b8207 },
+	{ 0x3d400194, 0x2020303 },
+	{ 0x3d400198, 0x7f04011 },
+	{ 0x3d40019c, 0xb0 },
+	{ 0x3d4001a0, 0xe0400018 },
+	{ 0x3d4001a4, 0x48005a },
+	{ 0x3d4001a8, 0x80000000 },
+	{ 0x3d4001b0, 0x1 },
+	{ 0x3d4001b4, 0xb07 },
+	{ 0x3d4001b8, 0x4 },
+	{ 0x3d4001c0, 0x1 },
+	{ 0x3d4001c4, 0x0 },
+	{ 0x3d400200, 0x3f1f },
+	{ 0x3d400204, 0x3f0909 },
+	{ 0x3d400208, 0x700 },
+	{ 0x3d40020c, 0x0 },
+	{ 0x3d400210, 0x1f1f },
+	{ 0x3d400214, 0x7070707 },
+	{ 0x3d400218, 0x7070707 },
+	{ 0x3d40021c, 0xf0f },
+	{ 0x3d400220, 0x3f01 },
+	{ 0x3d400240, 0x6000610 },
+	{ 0x3d400244, 0x1323 },
+	{ 0x3d400400, 0x100 },
+	{ 0x3d400250, 0x317d1a07 },
+	{ 0x3d400254, 0xf },
+	{ 0x3d40025c, 0x2a001b76 },
+	{ 0x3d400264, 0x7300b473 },
+	{ 0x3d40026c, 0x30000e06 },
+	{ 0x3d400300, 0x14 },
+	{ 0x3d40036c, 0x10 },
+	{ 0x3d400404, 0x13193 },
+	{ 0x3d400408, 0x6096 },
+	{ 0x3d400490, 0x1 },
+	{ 0x3d400494, 0x2000c00 },
+	{ 0x3d400498, 0x3c00db },
+	{ 0x3d40049c, 0x100009 },
+	{ 0x3d4004a0, 0x2 },
+	{ 0x3d402050, 0x210070 },
+	{ 0x3d402064, 0x40005e },
+	{ 0x3d4020dc, 0x40105 },
+	{ 0x3d4020e0, 0x0 },
+	{ 0x3d4020e8, 0x2000600 },
+	{ 0x3d4020ec, 0x10 },
+	{ 0x3d402100, 0xb081209 },
+	{ 0x3d402104, 0x2020d },
+	{ 0x3d402108, 0x5050309 },
+	{ 0x3d40210c, 0x400c },
+	{ 0x3d402110, 0x5030206 },
+	{ 0x3d402114, 0x3030202 },
+	{ 0x3d40211c, 0x303 },
+	{ 0x3d402120, 0x3030d04 },
+	{ 0x3d402124, 0x20208 },
+	{ 0x3d40212c, 0x1005010e },
+	{ 0x3d402130, 0x8 },
+	{ 0x3d40213c, 0x0 },
+	{ 0x3d402180, 0x1000040 },
+	{ 0x3d402190, 0x3858204 },
+	{ 0x3d402194, 0x2020303 },
+	{ 0x3d4021b4, 0x504 },
+	{ 0x3d4021b8, 0x4 },
+	{ 0x3d402240, 0x6000604 },
+	{ 0x3d4020f4, 0xec7 },
+};
+
+/* PHY Initialize Configuration */
+static struct dram_cfg_param ddr_ddrphy_cfg[] = {
+	{ 0x1005f, 0x2fd },
+	{ 0x1015f, 0x2fd },
+	{ 0x1105f, 0x2fd },
+	{ 0x1115f, 0x2fd },
+	{ 0x11005f, 0x2fd },
+	{ 0x11015f, 0x2fd },
+	{ 0x11105f, 0x2fd },
+	{ 0x11115f, 0x2fd },
+	{ 0x55, 0x355 },
+	{ 0x1055, 0x355 },
+	{ 0x2055, 0x355 },
+	{ 0x3055, 0x355 },
+	{ 0x4055, 0x55 },
+	{ 0x5055, 0x55 },
+	{ 0x6055, 0x355 },
+	{ 0x7055, 0x355 },
+	{ 0x8055, 0x355 },
+	{ 0x9055, 0x355 },
+	{ 0x200c5, 0xa },
+	{ 0x1200c5, 0x6 },
+	{ 0x2002e, 0x2 },
+	{ 0x12002e, 0x1 },
+	{ 0x20024, 0x8 },
+	{ 0x2003a, 0x2 },
+	{ 0x120024, 0x8 },
+	{ 0x2003a, 0x2 },
+	{ 0x20056, 0x6 },
+	{ 0x120056, 0xa },
+	{ 0x1004d, 0x1a },
+	{ 0x1014d, 0x1a },
+	{ 0x1104d, 0x1a },
+	{ 0x1114d, 0x1a },
+	{ 0x11004d, 0x1a },
+	{ 0x11014d, 0x1a },
+	{ 0x11104d, 0x1a },
+	{ 0x11114d, 0x1a },
+	{ 0x10049, 0xe38 },
+	{ 0x10149, 0xe38 },
+	{ 0x11049, 0xe38 },
+	{ 0x11149, 0xe38 },
+	{ 0x110049, 0xe38 },
+	{ 0x110149, 0xe38 },
+	{ 0x111049, 0xe38 },
+	{ 0x111149, 0xe38 },
+	{ 0x43, 0x63 },
+	{ 0x1043, 0x63 },
+	{ 0x2043, 0x63 },
+	{ 0x3043, 0x63 },
+	{ 0x4043, 0x63 },
+	{ 0x5043, 0x63 },
+	{ 0x6043, 0x63 },
+	{ 0x7043, 0x63 },
+	{ 0x8043, 0x63 },
+	{ 0x9043, 0x63 },
+	{ 0x20018, 0x1 },
+	{ 0x20075, 0x2 },
+	{ 0x20050, 0x0 },
+	{ 0x20008, 0x258 },
+	{ 0x120008, 0x10a },
+	{ 0x20088, 0x9 },
+	{ 0x200b2, 0x268 },
+	{ 0x10043, 0x5b1 },
+	{ 0x10143, 0x5b1 },
+	{ 0x11043, 0x5b1 },
+	{ 0x11143, 0x5b1 },
+	{ 0x1200b2, 0x268 },
+	{ 0x110043, 0x5b1 },
+	{ 0x110143, 0x5b1 },
+	{ 0x111043, 0x5b1 },
+	{ 0x111143, 0x5b1 },
+	{ 0x200fa, 0x1 },
+	{ 0x1200fa, 0x1 },
+	{ 0x20019, 0x5 },
+	{ 0x120019, 0x5 },
+	{ 0x200f0, 0x5555 },
+	{ 0x200f1, 0x5555 },
+	{ 0x200f2, 0x5555 },
+	{ 0x200f3, 0x5555 },
+	{ 0x200f4, 0x5555 },
+	{ 0x200f5, 0x5555 },
+	{ 0x200f6, 0x5555 },
+	{ 0x200f7, 0xf000 },
+	{ 0x20025, 0x0 },
+	{ 0x2002d, 0x0 },
+	{ 0x12002d, 0x0 },
+	{ 0x2005b, 0x7529 },
+	{ 0x2005c, 0x0 },
+	{ 0x200c7, 0x21 },
+	{ 0x200ca, 0x24 },
+	{ 0x200cc, 0x1f7 },
+	{ 0x1200c7, 0x21 },
+	{ 0x1200ca, 0x24 },
+	{ 0x1200cc, 0x1f7 },
+	{ 0x2007d, 0x212 },
+	{ 0x12007d, 0x212 },
+	{ 0x2007c, 0x61 },
+	{ 0x12007c, 0x61 },
+	{ 0x1004a, 0x500 },
+	{ 0x1104a, 0x500 },
+	{ 0x2002c, 0x0 },
+};
+
+/* P0 message block parameter for training firmware */
+static struct dram_cfg_param ddr_fsp0_cfg[] = {
+	{ 0xd0000, 0x0 },
+	{ 0x54003, 0x960 },
+	{ 0x54004, 0x2 },
+	{ 0x54005, 0x2830 },
+	{ 0x54006, 0x25e },
+	{ 0x54007, 0x1000 },
+	{ 0x54008, 0x101 },
+	{ 0x5400b, 0x31f },
+	{ 0x5400c, 0xc8 },
+	{ 0x5400d, 0x100 },
+	{ 0x54012, 0x1 },
+	{ 0x5402f, 0x834 },
+	{ 0x54030, 0x105 },
+	{ 0x54031, 0x18 },
+	{ 0x54032, 0x200 },
+	{ 0x54033, 0x200 },
+	{ 0x54034, 0x600 },
+	{ 0x54035, 0x810 },
+	{ 0x54036, 0x101 },
+	{ 0x5403f, 0x1221 },
+	{ 0x541fc, 0x100 },
+	{ 0xd0000, 0x1 },
+};
+
+/* P1 message block parameter for training firmware */
+static struct dram_cfg_param ddr_fsp1_cfg[] = {
+	{ 0xd0000, 0x0 },
+	{ 0x54002, 0x1 },
+	{ 0x54003, 0x42a },
+	{ 0x54004, 0x2 },
+	{ 0x54005, 0x2830 },
+	{ 0x54006, 0x25e },
+	{ 0x54007, 0x1000 },
+	{ 0x54008, 0x101 },
+	{ 0x5400b, 0x21f },
+	{ 0x5400c, 0xc8 },
+	{ 0x5400d, 0x100 },
+	{ 0x54012, 0x1 },
+	{ 0x5402f, 0x4 },
+	{ 0x54030, 0x105 },
+	{ 0x54033, 0x200 },
+	{ 0x54034, 0x600 },
+	{ 0x54035, 0x10 },
+	{ 0x54036, 0x101 },
+	{ 0x5403f, 0x1221 },
+	{ 0x541fc, 0x100 },
+	{ 0xd0000, 0x1 },
+};
+
+/* P0 2D message block parameter for training firmware */
+static struct dram_cfg_param ddr_fsp0_2d_cfg[] = {
+	{ 0xd0000, 0x0 },
+	{ 0x54003, 0x960 },
+	{ 0x54004, 0x2 },
+	{ 0x54005, 0x2830 },
+	{ 0x54006, 0x25e },
+	{ 0x54007, 0x1000 },
+	{ 0x54008, 0x101 },
+	{ 0x5400b, 0x61 },
+	{ 0x5400c, 0xc8 },
+	{ 0x5400d, 0x100 },
+	{ 0x5400e, 0x1f7f },
+	{ 0x54012, 0x1 },
+	{ 0x5402f, 0x834 },
+	{ 0x54030, 0x105 },
+	{ 0x54031, 0x18 },
+	{ 0x54032, 0x200 },
+	{ 0x54033, 0x200 },
+	{ 0x54034, 0x600 },
+	{ 0x54035, 0x810 },
+	{ 0x54036, 0x101 },
+	{ 0x5403f, 0x1221 },
+	{ 0x541fc, 0x100 },
+	{ 0xd0000, 0x1 },
+};
+
+/* DRAM PHY init engine image */
+static struct dram_cfg_param ddr_phy_pie[] = {
+	{ 0xd0000, 0x0 },
+	{ 0x90000, 0x10 },
+	{ 0x90001, 0x400 },
+	{ 0x90002, 0x10e },
+	{ 0x90003, 0x0 },
+	{ 0x90004, 0x0 },
+	{ 0x90005, 0x8 },
+	{ 0x90029, 0xb },
+	{ 0x9002a, 0x480 },
+	{ 0x9002b, 0x109 },
+	{ 0x9002c, 0x8 },
+	{ 0x9002d, 0x448 },
+	{ 0x9002e, 0x139 },
+	{ 0x9002f, 0x8 },
+	{ 0x90030, 0x478 },
+	{ 0x90031, 0x109 },
+	{ 0x90032, 0x2 },
+	{ 0x90033, 0x10 },
+	{ 0x90034, 0x139 },
+	{ 0x90035, 0xb },
+	{ 0x90036, 0x7c0 },
+	{ 0x90037, 0x139 },
+	{ 0x90038, 0x44 },
+	{ 0x90039, 0x633 },
+	{ 0x9003a, 0x159 },
+	{ 0x9003b, 0x14f },
+	{ 0x9003c, 0x630 },
+	{ 0x9003d, 0x159 },
+	{ 0x9003e, 0x47 },
+	{ 0x9003f, 0x633 },
+	{ 0x90040, 0x149 },
+	{ 0x90041, 0x4f },
+	{ 0x90042, 0x633 },
+	{ 0x90043, 0x179 },
+	{ 0x90044, 0x8 },
+	{ 0x90045, 0xe0 },
+	{ 0x90046, 0x109 },
+	{ 0x90047, 0x0 },
+	{ 0x90048, 0x7c8 },
+	{ 0x90049, 0x109 },
+	{ 0x9004a, 0x0 },
+	{ 0x9004b, 0x1 },
+	{ 0x9004c, 0x8 },
+	{ 0x9004d, 0x0 },
+	{ 0x9004e, 0x45a },
+	{ 0x9004f, 0x9 },
+	{ 0x90050, 0x0 },
+	{ 0x90051, 0x448 },
+	{ 0x90052, 0x109 },
+	{ 0x90053, 0x40 },
+	{ 0x90054, 0x633 },
+	{ 0x90055, 0x179 },
+	{ 0x90056, 0x1 },
+	{ 0x90057, 0x618 },
+	{ 0x90058, 0x109 },
+	{ 0x90059, 0x40c0 },
+	{ 0x9005a, 0x633 },
+	{ 0x9005b, 0x149 },
+	{ 0x9005c, 0x8 },
+	{ 0x9005d, 0x4 },
+	{ 0x9005e, 0x48 },
+	{ 0x9005f, 0x4040 },
+	{ 0x90060, 0x633 },
+	{ 0x90061, 0x149 },
+	{ 0x90062, 0x0 },
+	{ 0x90063, 0x4 },
+	{ 0x90064, 0x48 },
+	{ 0x90065, 0x40 },
+	{ 0x90066, 0x633 },
+	{ 0x90067, 0x149 },
+	{ 0x90068, 0x10 },
+	{ 0x90069, 0x4 },
+	{ 0x9006a, 0x18 },
+	{ 0x9006b, 0x0 },
+	{ 0x9006c, 0x4 },
+	{ 0x9006d, 0x78 },
+	{ 0x9006e, 0x549 },
+	{ 0x9006f, 0x633 },
+	{ 0x90070, 0x159 },
+	{ 0x90071, 0xd49 },
+	{ 0x90072, 0x633 },
+	{ 0x90073, 0x159 },
+	{ 0x90074, 0x94a },
+	{ 0x90075, 0x633 },
+	{ 0x90076, 0x159 },
+	{ 0x90077, 0x441 },
+	{ 0x90078, 0x633 },
+	{ 0x90079, 0x149 },
+	{ 0x9007a, 0x42 },
+	{ 0x9007b, 0x633 },
+	{ 0x9007c, 0x149 },
+	{ 0x9007d, 0x1 },
+	{ 0x9007e, 0x633 },
+	{ 0x9007f, 0x149 },
+	{ 0x90080, 0x0 },
+	{ 0x90081, 0xe0 },
+	{ 0x90082, 0x109 },
+	{ 0x90083, 0xa },
+	{ 0x90084, 0x10 },
+	{ 0x90085, 0x109 },
+	{ 0x90086, 0x9 },
+	{ 0x90087, 0x3c0 },
+	{ 0x90088, 0x149 },
+	{ 0x90089, 0x9 },
+	{ 0x9008a, 0x3c0 },
+	{ 0x9008b, 0x159 },
+	{ 0x9008c, 0x18 },
+	{ 0x9008d, 0x10 },
+	{ 0x9008e, 0x109 },
+	{ 0x9008f, 0x0 },
+	{ 0x90090, 0x3c0 },
+	{ 0x90091, 0x109 },
+	{ 0x90092, 0x18 },
+	{ 0x90093, 0x4 },
+	{ 0x90094, 0x48 },
+	{ 0x90095, 0x18 },
+	{ 0x90096, 0x4 },
+	{ 0x90097, 0x58 },
+	{ 0x90098, 0xb },
+	{ 0x90099, 0x10 },
+	{ 0x9009a, 0x109 },
+	{ 0x9009b, 0x1 },
+	{ 0x9009c, 0x10 },
+	{ 0x9009d, 0x109 },
+	{ 0x9009e, 0x5 },
+	{ 0x9009f, 0x7c0 },
+	{ 0x900a0, 0x109 },
+	{ 0x900a1, 0x0 },
+	{ 0x900a2, 0x8140 },
+	{ 0x900a3, 0x10c },
+	{ 0x900a4, 0x10 },
+	{ 0x900a5, 0x8138 },
+	{ 0x900a6, 0x10c },
+	{ 0x900a7, 0x8 },
+	{ 0x900a8, 0x7c8 },
+	{ 0x900a9, 0x101 },
+	{ 0x900aa, 0x8 },
+	{ 0x900ab, 0x448 },
+	{ 0x900ac, 0x109 },
+	{ 0x900ad, 0xf },
+	{ 0x900ae, 0x7c0 },
+	{ 0x900af, 0x109 },
+	{ 0x900b0, 0x47 },
+	{ 0x900b1, 0x630 },
+	{ 0x900b2, 0x109 },
+	{ 0x900b3, 0x8 },
+	{ 0x900b4, 0x618 },
+	{ 0x900b5, 0x109 },
+	{ 0x900b6, 0x8 },
+	{ 0x900b7, 0xe0 },
+	{ 0x900b8, 0x109 },
+	{ 0x900b9, 0x0 },
+	{ 0x900ba, 0x7c8 },
+	{ 0x900bb, 0x109 },
+	{ 0x900bc, 0x8 },
+	{ 0x900bd, 0x8140 },
+	{ 0x900be, 0x10c },
+	{ 0x900bf, 0x0 },
+	{ 0x900c0, 0x1 },
+	{ 0x900c1, 0x8 },
+	{ 0x900c2, 0x8 },
+	{ 0x900c3, 0x4 },
+	{ 0x900c4, 0x8 },
+	{ 0x900c5, 0x8 },
+	{ 0x900c6, 0x7c8 },
+	{ 0x900c7, 0x101 },
+	{ 0x90006, 0x0 },
+	{ 0x90007, 0x0 },
+	{ 0x90008, 0x8 },
+	{ 0x90009, 0x0 },
+	{ 0x9000a, 0x0 },
+	{ 0x9000b, 0x0 },
+	{ 0xd00e7, 0x400 },
+	{ 0x90017, 0x0 },
+	{ 0x90026, 0x2b },
+	{ 0x2000b, 0x4b },
+	{ 0x2000c, 0x96 },
+	{ 0x2000d, 0x5dc },
+	{ 0x2000e, 0x2c },
+	{ 0x12000b, 0x21 },
+	{ 0x12000c, 0x42 },
+	{ 0x12000d, 0x29a },
+	{ 0x12000e, 0x21 },
+	{ 0x9000c, 0x0 },
+	{ 0x9000d, 0x173 },
+	{ 0x9000e, 0x60 },
+	{ 0x9000f, 0x6110 },
+	{ 0x90010, 0x2152 },
+	{ 0x90011, 0xdfbd },
+	{ 0x90012, 0xffff },
+	{ 0x90013, 0x6152 },
+	{ 0x20089, 0x1 },
+	{ 0x20088, 0x19 },
+	{ 0xc0080, 0x0 },
+	{ 0xd0000, 0x1 },
+};
+
+static struct dram_fsp_msg ddr_dram_fsp_msg[] = {
+	{
+		/* P0 2400mts 1D */
+		.drate = 2400,
+		.fw_type = FW_1D_IMAGE,
+		.fsp_cfg = ddr_fsp0_cfg,
+		.fsp_cfg_num = ARRAY_SIZE(ddr_fsp0_cfg),
+	},
+	{
+		/* P1 1066mts 1D */
+		.drate = 1066,
+		.fw_type = FW_1D_IMAGE,
+		.fsp_cfg = ddr_fsp1_cfg,
+		.fsp_cfg_num = ARRAY_SIZE(ddr_fsp1_cfg),
+	},
+	{
+		/* P0 2400mts 2D */
+		.drate = 2400,
+		.fw_type = FW_2D_IMAGE,
+		.fsp_cfg = ddr_fsp0_2d_cfg,
+		.fsp_cfg_num = ARRAY_SIZE(ddr_fsp0_2d_cfg),
+	},
+};
+
+/* ddr timing config params */
+struct dram_timing_info dram_timing = {
+	.ddrc_cfg = ddr_ddrc_cfg,
+	.ddrc_cfg_num = ARRAY_SIZE(ddr_ddrc_cfg),
+	.ddrphy_cfg = ddr_ddrphy_cfg,
+	.ddrphy_cfg_num = ARRAY_SIZE(ddr_ddrphy_cfg),
+	.fsp_msg = ddr_dram_fsp_msg,
+	.fsp_msg_num = ARRAY_SIZE(ddr_dram_fsp_msg),
+	.ddrphy_pie = ddr_phy_pie,
+	.ddrphy_pie_num = ARRAY_SIZE(ddr_phy_pie),
+	.fsp_table = { 2400, 1066, },
+};
diff --git a/board/variscite/imx8mn_var_som/imx8mn_var_som.c b/board/variscite/imx8mn_var_som/imx8mn_var_som.c
new file mode 100644
index 0000000..e274e0e
--- /dev/null
+++ b/board/variscite/imx8mn_var_som/imx8mn_var_som.c
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2021 Collabora Ltd.
+ */
+
+#include <common.h>
+#include <env.h>
+#include <asm/io.h>
+
+static void setup_fec(void)
+{
+	struct iomuxc_gpr_base_regs *gpr =
+		(struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;
+
+	/* Use 125M anatop REF_CLK1 for ENET1, not from external */
+	clrsetbits_le32(&gpr->gpr[1], 0x2000, 0);
+}
+
+int board_init(void)
+{
+	if (CONFIG_IS_ENABLED(FEC_MXC))
+		setup_fec();
+
+	return 0;
+}
+
+int board_mmc_get_env_dev(int devno)
+{
+	return devno;
+}
diff --git a/board/variscite/imx8mn_var_som/imximage-8mn-ddr4.cfg b/board/variscite/imx8mn_var_som/imximage-8mn-ddr4.cfg
new file mode 100644
index 0000000..2083233
--- /dev/null
+++ b/board/variscite/imx8mn_var_som/imximage-8mn-ddr4.cfg
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2021 Collabora Ltd.
+ */
+
+#define __ASSEMBLY__
+
+ROM_VERSION	v2
+BOOT_FROM	sd
+LOADER		u-boot-spl-ddr.bin	0x912000
diff --git a/board/variscite/imx8mn_var_som/spl.c b/board/variscite/imx8mn_var_som/spl.c
new file mode 100644
index 0000000..32703c5
--- /dev/null
+++ b/board/variscite/imx8mn_var_som/spl.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2021 Collabora Ltd.
+ *
+ */
+
+#include <hang.h>
+#include <init.h>
+#include <spl.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/ddr.h>
+#include <asm/arch/imx8mn_pins.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/mach-imx/boot_mode.h>
+#include <asm/mach-imx/gpio.h>
+#include <dm/device.h>
+#include <dm/uclass.h>
+
+int spl_board_boot_device(enum boot_device boot_dev_spl)
+{
+	return BOOT_DEVICE_BOOTROM;
+}
+
+void spl_dram_init(void)
+{
+	ddr_init(&dram_timing);
+}
+
+void spl_board_init(void)
+{
+	struct udevice *dev;
+	int ret;
+
+	debug("Normal Boot\n");
+
+	ret = uclass_get_device_by_name(UCLASS_CLK,
+					"clock-controller@30380000",
+					&dev);
+	if (ret < 0)
+		puts("Failed to find clock node. Check device tree\n");
+}
+
+#define UART_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_FSEL1)
+#define WDOG_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_ODE | PAD_CTL_PUE | PAD_CTL_PE)
+
+static const iomux_v3_cfg_t uart_pads[] = {
+	IMX8MN_PAD_UART4_RXD__UART4_DCE_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MN_PAD_UART4_TXD__UART4_DCE_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
+};
+
+static const iomux_v3_cfg_t wdog_pads[] = {
+	IMX8MN_PAD_GPIO1_IO02__WDOG1_WDOG_B | MUX_PAD_CTRL(WDOG_PAD_CTRL),
+};
+
+int board_early_init_f(void)
+{
+	struct wdog_regs *wdog = (struct wdog_regs *)WDOG1_BASE_ADDR;
+
+	imx_iomux_v3_setup_multiple_pads(wdog_pads, ARRAY_SIZE(wdog_pads));
+	set_wdog_reset(wdog);
+
+	imx_iomux_v3_setup_multiple_pads(uart_pads, ARRAY_SIZE(uart_pads));
+	init_uart_clk(3);
+
+	return 0;
+}
+
+void board_init_f(ulong dummy)
+{
+	int ret;
+
+	/* Clear the BSS. */
+	memset(__bss_start, 0, __bss_end - __bss_start);
+
+	arch_cpu_init();
+
+	board_early_init_f();
+
+	timer_init();
+
+	preloader_console_init();
+
+	ret = spl_init();
+	if (ret) {
+		debug("spl_init() failed: %d\n", ret);
+		hang();
+	}
+
+	/* DDR initialization */
+	spl_dram_init();
+
+	board_init_r(NULL, 0);
+}