mb/amd/birman_plus: Add Birman+ board support for Phoenix SOC

1) Initial commit for upstreaming Birmanplus mainboard changes.
2) Add the DXIO descriptors for Birmanplus mainboard.

Change-Id: I075dcf0214f8dc8b33b0e429d83d270b2f0952e1
Signed-off-by: Anand Vaikar <a.vaikar2021@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80353
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

17 files changed, 1345 insertions, 0 deletions

diff --git a/src/mainboard/amd/birman_plus/Kconfig b/src/mainboard/amd/birman_plus/Kconfig
new file mode 100644
index 000000000000..29ad9c0f857d
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/Kconfig
@@ -0,0 +1,148 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config BOARD_AMD_BIRMANPLUS_COMMON
+	def_bool n
+	select BOARD_ROMSIZE_KB_16384	# Birman actually has a 32MiB ROM
+	select EC_ACPI
+	select SOC_AMD_COMMON_BLOCK_USE_ESPI if !SOC_AMD_COMMON_BLOCK_SIMNOW_BUILD
+	select DRIVERS_PCIE_RTD3_DEVICE
+	select MAINBOARD_HAS_CHROMEOS
+	select PCIEXP_ASPM
+	select PCIEXP_CLK_PM
+	select PCIEXP_COMMON_CLOCK
+	select PCIEXP_L1_SUB_STATE
+	select SOC_AMD_COMMON_BLOCK_ESPI_RETAIN_PORT80_EN if !SOC_AMD_COMMON_BLOCK_SIMNOW_BUILD
+	select SOC_AMD_COMMON_BLOCK_SIMNOW_SUPPORTED
+	select SPI_FLASH_EXIT_4_BYTE_ADDR_MODE
+
+
+config BOARD_AMD_BIRMANPLUS_PHOENIX
+	select BOARD_AMD_BIRMANPLUS_COMMON
+	select SOC_AMD_PHOENIX_FSP
+
+if BOARD_AMD_BIRMANPLUS_COMMON
+
+config FMDFILE
+	default "src/mainboard/amd/birman_plus/chromeos_phoenix.fmd" if CHROMEOS && BOARD_AMD_BIRMANPLUS_PHOENIX
+	default "src/mainboard/amd/birman_plus/board_phoenix.fmd" if BOARD_AMD_BIRMANPLUS_PHOENIX
+
+config MAINBOARD_DIR
+	default "amd/birman_plus" if BOARD_AMD_BIRMANPLUS_PHOENIX
+
+config MAINBOARD_PART_NUMBER
+	default "Birmanplus_Phoenix" if BOARD_AMD_BIRMANPLUS_PHOENIX
+
+config DEVICETREE
+	default "devicetree_phoenix.cb"
+
+config BIRMANPLUS_HAVE_MCHP_FW
+	bool "Have Microchip EC firmware?"
+	default n
+
+config BIRMANPLUS_MCHP_SIG_FILE
+	string "Microchip EC signature file"
+	depends on BIRMAN_HAVE_MCHP_FW
+	default "3rdparty/blobs/mainboard/amd/birman_plus/EC_birmanplus_sig.bin"
+	help
+	  The EC sig blob is the first 4kBytes of the firmware image.
+	  The first 4 bytes form a pointer (with CRC) to where the EC firmware
+	  is located
+
+config AMD_SOC_CONSOLE_UART
+	default y if !SOC_AMD_COMMON_BLOCK_SIMNOW_BUILD
+
+config BIRMANPLUS_MCHP_FW_FILE
+	string "Microchip EC firmware file"
+	depends on BIRMAN_HAVE_MCHP_FW
+	default "3rdparty/blobs/mainboard/amd/birman_plus/EC_birmanplus.bin"
+	help
+	  The EC firmware blob is at the EC_BODY FMAP region of the firmware image.
+
+config VBOOT
+	select VBOOT_NO_BOARD_SUPPORT
+	select VBOOT_SEPARATE_VERSTAGE
+	select VBOOT_STARTS_IN_BOOTBLOCK
+
+config VBOOT_VBNV_OFFSET
+	hex
+	default 0x2A
+
+config RO_REGION_ONLY
+	string
+	depends on VBOOT_SLOTS_RW_AB || VBOOT_SLOTS_RW_A
+	# Add the EFS and EC to the RO region only
+	# This is a birman-specific override of soc/amd/(phoenix | glinda)/Kconfig
+	default "apu/amdfw apu/ecfw"
+
+config CHROMEOS
+	# Use default libpayload config
+	select LP_DEFCONFIG_OVERRIDE if PAYLOAD_DEPTHCHARGE
+	# We don't have recovery buttons, so we can't manually enable devmode.
+	select GBB_FLAG_FORCE_DEV_SWITCH_ON
+
+config ENABLE_EVAL_CARD
+	bool "Enable Eval Card"
+	help
+	  Enable the Eval Card PCIe slot
+
+config ENABLE_EVAL_19V
+	bool "Enable 19V rail for Eval Card"
+	depends on ENABLE_EVAL_CARD
+	help
+	  Enable the 19V rail for Eval Card PCIe slot
+
+choice
+	prompt "DT SLOT/M.2 SSD1 ENABLE"
+	default ENABLE_DT_SLOT_BIRMANPLUS
+	help
+	  Either DT slot or M.2 SSD1 can be used, as they are sharing PCIe lanes.
+
+config ENABLE_DT_SLOT_BIRMANPLUS
+	bool "Enable DT slot"
+
+config ENABLE_M2_SSD1_BIRMANPLUS
+	bool "Enable M.2 SSD1"
+
+config DISABLE_DT_M2_BIRMANPLUS
+	bool "Disable both DT and M.2 slot"
+
+endchoice
+
+choice
+	prompt "WLAN/WWAN Selection"
+	default WLAN0_WWAN0_BIRMANPLUS
+	help
+	  WLAN and WWAN lane configuration
+
+config WLAN0_WWAN0_BIRMANPLUS
+	bool "Both WLAN and WWAN Enabled (1 lane each)"
+
+config WLAN01_BIRMANPLUS
+	bool "Only WLAN Enabled (2 lanes WLAN, 0 lanes WWAN)"
+
+config WWAN01_BIRMANPLUS
+	bool "Only WWAN Enabled (2 lanes WWAN, 0 lanes WLAN)"
+
+endchoice
+if !EM100	# EM100 defaults in soc/amd/common/blocks/spi/Kconfig
+config EFS_SPI_READ_MODE
+	default 3	# Quad IO (1-1-4)
+
+config EFS_SPI_SPEED
+	default 0	# 66MHz
+
+config EFS_SPI_MICRON_FLAG
+	default 0
+
+config NORMAL_READ_SPI_SPEED
+	default 1	# 33MHz
+
+config ALT_SPI_SPEED
+	default 1	# 33MHz
+
+config TPM_SPI_SPEED
+	default 1	# 33MHz
+
+endif # !EM100
+
+endif # BOARD_AMD_BIRMANPLUS_COMMON
diff --git a/src/mainboard/amd/birman_plus/Kconfig.name b/src/mainboard/amd/birman_plus/Kconfig.name
new file mode 100644
index 000000000000..69834bc263b1
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/Kconfig.name
@@ -0,0 +1,4 @@
+comment "BirmanPlus"
+
+config BOARD_AMD_BIRMANPLUS_PHOENIX
+	bool "->  BirmanPlus for Phoenix SoC"
diff --git a/src/mainboard/amd/birman_plus/Makefile.mk b/src/mainboard/amd/birman_plus/Makefile.mk
new file mode 100644
index 000000000000..f08f3050a858
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/Makefile.mk
@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+bootblock-y += bootblock.c
+bootblock-y += early_gpio.c
+bootblock-y += ec.c
+
+romstage-$(CONFIG_BOARD_AMD_BIRMANPLUS_PHOENIX) += port_descriptors.c
+
+ramstage-y += chromeos.c
+ramstage-y += gpio.c
+ramstage-$(CONFIG_BOARD_AMD_BIRMANPLUS_PHOENIX) += port_descriptors.c
+
+
+ifneq ($(wildcard $(MAINBOARD_BLOBS_DIR)/APCB_FP8_LPDDR5.bin),)
+APCB_SOURCES = $(MAINBOARD_BLOBS_DIR)/APCB_FP8_LPDDR5.bin
+APCB_SOURCES_RECOVERY = $(MAINBOARD_BLOBS_DIR)/APCB_FP8_LPDDR5_DefaultRecovery.bin
+else
+show_notices:: warn_no_apcb
+endif
+
+ifeq ($(CONFIG_BIRMANPLUS_HAVE_MCHP_FW),y)
+$(call add_intermediate, add_mchp_fw)
+	$(CBFSTOOL) $(obj)/coreboot.pre write -r EC_SIG -f $(CONFIG_BIRMANPLUS_MCHP_SIG_FILE) --fill-upward
+	$(CBFSTOOL) $(obj)/coreboot.pre write -r EC_BODY -f $(CONFIG_BIRMANPLUS_MCHP_FW_FILE) --fill-upward
+
+else
+show_notices:: warn_no_mchp
+endif # CONFIG_BIRMAN_HAVE_MCHP_FW
+
+PHONY+=warn_no_mchp
+warn_no_mchp:
+	printf "\n\t** WARNING **\n"
+	printf "coreboot has been built without the EC FW.\n"
+	printf "Do not flash this image.  Your Birman's power button\n"
+	printf "will not respond when you press it.\n\n"
diff --git a/src/mainboard/amd/birman_plus/board_info.txt b/src/mainboard/amd/birman_plus/board_info.txt
new file mode 100644
index 000000000000..b351b8e696f5
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/board_info.txt
@@ -0,0 +1 @@
+Category: eval
diff --git a/src/mainboard/amd/birman_plus/board_phoenix.fmd b/src/mainboard/amd/birman_plus/board_phoenix.fmd
new file mode 100644
index 000000000000..bc09fe75d5fe
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/board_phoenix.fmd
@@ -0,0 +1,9 @@
+FLASH@0xFF000000 16M {
+	BIOS {
+		EC_SIG 4K
+		FMAP 4K
+		COREBOOT(CBFS)
+		EC_BODY@15872K 256K
+		RW_MRC_CACHE 256K
+	}
+}
diff --git a/src/mainboard/amd/birman_plus/bootblock.c b/src/mainboard/amd/birman_plus/bootblock.c
new file mode 100644
index 000000000000..1c47e6d890cc
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/bootblock.c
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <bootblock_common.h>
+#include <soc/espi.h>
+#include "ec.h"
+#include "gpio.h"
+
+void bootblock_mainboard_early_init(void)
+{
+	mainboard_program_early_gpios();
+
+	espi_switch_to_spi1_pads();
+}
+
+void bootblock_mainboard_init(void)
+{
+	if (!CONFIG(SOC_AMD_COMMON_BLOCK_SIMNOW_BUILD))
+		birman_ec_init();
+}
diff --git a/src/mainboard/amd/birman_plus/chromeos.c b/src/mainboard/amd/birman_plus/chromeos.c
new file mode 100644
index 000000000000..515da94df16c
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/chromeos.c
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <bootmode.h>
+#include <boot/coreboot_tables.h>
+#include <gpio.h>
+#include <types.h>
+#include <vendorcode/google/chromeos/chromeos.h>
+
+void fill_lb_gpios(struct lb_gpios *gpios)
+{
+	struct lb_gpio chromeos_gpios[] = {};
+	lb_add_gpios(gpios, chromeos_gpios, ARRAY_SIZE(chromeos_gpios));
+}
+
+int get_write_protect_state(void)
+{
+	/* Birman doesn't have a write protect pin */
+	return 0;
+}
+
+DECLARE_NO_CROS_GPIOS();
diff --git a/src/mainboard/amd/birman_plus/chromeos_phoenix.fmd b/src/mainboard/amd/birman_plus/chromeos_phoenix.fmd
new file mode 100644
index 000000000000..9d6d40216960
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/chromeos_phoenix.fmd
@@ -0,0 +1,35 @@
+FLASH@0xFF000000 16M {
+	SI_BIOS {
+		WP_RO 8M {
+			EC_SIG 4K
+			RO_VPD(PRESERVE) 16K
+			RO_SECTION {
+				FMAP 2K
+				RO_FRID 64
+				COREBOOT(CBFS)
+				GBB 448K
+			}
+		}
+		RW_SECTION_A 3M {
+			VBLOCK_A 8K
+			FW_MAIN_A(CBFS)
+			RW_FWID_A 256
+		}
+		RW_SECTION_B 3M {
+			VBLOCK_B 8K
+			FW_MAIN_B(CBFS)
+			RW_FWID_B 256
+		}
+		RW_ELOG(PRESERVE) 4K
+		RW_SHARED 16K {
+			SHARED_DATA 8K
+			VBLOCK_DEV 8K
+		}
+		RW_VPD(PRESERVE) 8K
+		RW_NVRAM(PRESERVE) 20K
+		SMMSTORE(PRESERVE) 64K
+		RW_LEGACY(CBFS)
+		EC_BODY@15872K 256K
+		RW_MRC_CACHE(PRESERVE) 256K
+	}
+}
diff --git a/src/mainboard/amd/birman_plus/devicetree_phoenix.cb b/src/mainboard/amd/birman_plus/devicetree_phoenix.cb
new file mode 100644
index 000000000000..3fc1f0dfcac6
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/devicetree_phoenix.cb
@@ -0,0 +1,291 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+# TODO: Update for birman
+
+chip soc/amd/phoenix
+	register "common_config.espi_config" = "{
+		.std_io_decode_bitmap = ESPI_DECODE_IO_0x80_EN | ESPI_DECODE_IO_0X2E_0X2F_EN | ESPI_DECODE_IO_0X60_0X64_EN,
+		.generic_io_range[0] = {
+			.base = 0x3f8,
+			.size = 8,
+		},
+		.generic_io_range[1] = {
+			.base = 0x600,
+			.size = 256,
+		},
+		.io_mode = ESPI_IO_MODE_QUAD,
+		.op_freq_mhz = ESPI_OP_FREQ_16_MHZ,
+		.crc_check_enable = 1,
+		.alert_pin = ESPI_ALERT_PIN_PUSH_PULL,
+		.periph_ch_en = 1,
+		.vw_ch_en = 1,
+		.oob_ch_en = 1,
+		.flash_ch_en = 0,
+	}"
+
+	register "i2c_scl_reset" = "GPIO_I2C0_SCL | GPIO_I2C1_SCL |
+					GPIO_I2C2_SCL | GPIO_I2C3_SCL"
+
+	register "i2c[0].early_init" = "1"
+	register "i2c[1].early_init" = "1"
+	register "i2c[2].early_init" = "1"
+	register "i2c[3].early_init" = "1"
+
+	# I2C Pad Control RX Select Configuration
+	register "i2c_pad[0].rx_level" = "I2C_PAD_RX_1_8V"
+	register "i2c_pad[1].rx_level" = "I2C_PAD_RX_1_8V"
+	register "i2c_pad[2].rx_level" = "I2C_PAD_RX_1_8V"
+	register "i2c_pad[3].rx_level" = "I2C_PAD_RX_1_8V"
+
+	register "s0ix_enable" = "true"
+
+	register "pspp_policy" = "DXIO_PSPP_DISABLED" # TODO: reenable when PSPP works
+
+	register "usb_phy_custom" = "1"
+	register "usb_phy" = "{
+		.Usb2PhyPort[0] = {
+			.compdistune = 0x1,
+			.pllbtune = 0x1,
+			.pllitune = 0x0,
+			.pllptune = 0xc,
+			.sqrxtune = 0x2,
+			.txfslstune = 0x1,
+			.txpreempamptune = 0x3,
+			.txpreemppulsetune = 0x0,
+			.txrisetune = 0x1,
+			.txvreftune = 0x3,
+			.txhsxvtune = 0x3,
+			.txrestune = 0x2,
+		},
+		.Usb2PhyPort[1] = {
+			.compdistune = 0x1,
+			.pllbtune = 0x1,
+			.pllitune = 0x0,
+			.pllptune = 0xc,
+			.sqrxtune = 0x2,
+			.txfslstune = 0x1,
+			.txpreempamptune = 0x3,
+			.txpreemppulsetune = 0x0,
+			.txrisetune = 0x1,
+			.txvreftune = 0x3,
+			.txhsxvtune = 0x3,
+			.txrestune = 0x2,
+		},
+		.Usb2PhyPort[2] = {
+			.compdistune = 0x1,
+			.pllbtune = 0x1,
+			.pllitune = 0x0,
+			.pllptune = 0xc,
+			.sqrxtune = 0x2,
+			.txfslstune = 0x1,
+			.txpreempamptune = 0x3,
+			.txpreemppulsetune = 0x0,
+			.txrisetune = 0x1,
+			.txvreftune = 0x3,
+			.txhsxvtune = 0x3,
+			.txrestune = 0x2,
+		},
+		.Usb2PhyPort[3] = {
+			.compdistune = 0x1,
+			.pllbtune = 0x1,
+			.pllitune = 0x0,
+			.pllptune = 0xc,
+			.sqrxtune = 0x2,
+			.txfslstune = 0x1,
+			.txpreempamptune = 0x3,
+			.txpreemppulsetune = 0x0,
+			.txrisetune = 0x1,
+			.txvreftune = 0x3,
+			.txhsxvtune = 0x3,
+			.txrestune = 0x2,
+		},
+		.Usb2PhyPort[4] = {
+			.compdistune = 0x1,
+			.pllbtune = 0x1,
+			.pllitune = 0x0,
+			.pllptune = 0xc,
+			.sqrxtune = 0x2,
+			.txfslstune = 0x1,
+			.txpreempamptune = 0x3,
+			.txpreemppulsetune = 0x0,
+			.txrisetune = 0x1,
+			.txvreftune = 0x3,
+			.txhsxvtune = 0x3,
+			.txrestune = 0x2,
+		},
+		.Usb2PhyPort[5] = {
+			.compdistune = 0x1,
+			.pllbtune = 0x1,
+			.pllitune = 0x0,
+			.pllptune = 0xc,
+			.sqrxtune = 0x2,
+			.txfslstune = 0x1,
+			.txpreempamptune = 0x3,
+			.txpreemppulsetune = 0x0,
+			.txrisetune = 0x1,
+			.txvreftune = 0x3,
+			.txhsxvtune = 0x3,
+			.txrestune = 0x2,
+		},
+		.Usb2PhyPort[6] = {
+			.compdistune = 0x3,
+			.pllbtune = 0x1,
+			.pllitune = 0x0,
+			.pllptune = 0xc,
+			.sqrxtune = 0x2,
+			.txfslstune = 0x1,
+			.txpreempamptune = 0x3,
+			.txpreemppulsetune = 0x0,
+			.txrisetune = 0x1,
+			.txvreftune = 0x6,
+			.txhsxvtune = 0x3,
+			.txrestune = 0x2,
+		},
+		.Usb2PhyPort[7] = {
+			.compdistune = 0x3,
+			.pllbtune = 0x1,
+			.pllitune = 0x0,
+			.pllptune = 0xc,
+			.sqrxtune = 0x2,
+			.txfslstune = 0x1,
+			.txpreempamptune = 0x3,
+			.txpreemppulsetune = 0x0,
+			.txrisetune = 0x1,
+			.txvreftune = 0x6,
+			.txhsxvtune = 0x3,
+			.txrestune = 0x2,
+		},
+		.Usb3PhyPort[0] = {
+			.tx_term_ctrl = 0x2,
+			.rx_term_ctrl = 0x2,
+			.tx_vboost_lvl_en = 0x0,
+			.tx_vboost_lvl = 0x5,
+		},
+		.Usb3PhyPort[1] = {
+			.tx_term_ctrl = 0x2,
+			.rx_term_ctrl = 0x2,
+			.tx_vboost_lvl_en = 0x0,
+			.tx_vboost_lvl = 0x5,
+		},
+		.Usb3PhyPort[2] = {
+			.tx_term_ctrl = 0x2,
+			.rx_term_ctrl = 0x2,
+			.tx_vboost_lvl_en = 0x0,
+			.tx_vboost_lvl = 0x5,
+		},
+		.ComboPhyStaticConfig[0] = USB_COMBO_PHY_MODE_USB_C,
+		.ComboPhyStaticConfig[1] = USB_COMBO_PHY_MODE_USB_C,
+		.ComboPhyStaticConfig[2] = USB_COMBO_PHY_MODE_USB_C,
+		.BatteryChargerEnable = 0,
+		.PhyP3CpmP4Support = 0,
+	}"
+
+	register "gpp_clk_config[0]" = "GPP_CLK_REQ" # MXM
+	register "gpp_clk_config[1]" = "GPP_CLK_REQ" # NVMe SSD1
+	register "gpp_clk_config[2]" = "GPP_CLK_REQ" # NVMe SSD0
+	register "gpp_clk_config[3]" = "GPP_CLK_REQ" # WLAN
+	register "gpp_clk_config[4]" = "GPP_CLK_REQ" # WWAN
+	register "gpp_clk_config[5]" = "GPP_CLK_REQ" # SD
+	register "gpp_clk_config[6]" = "GPP_CLK_REQ" # GBE
+
+	device domain 0 on
+		device ref iommu on end
+		device ref gpp_bridge_1_1 on end # MXM
+		device ref gpp_bridge_1_2 on
+			# Required so the NVMe gets placed into D3 when entering S0i3.
+			chip drivers/pcie/rtd3/device
+				register "name" = ""NVME""
+				device pci 00.0 on end
+			end
+		end # NVMe SSD1
+		device ref gpp_bridge_1_3 on end # GBE
+		device ref gpp_bridge_2_1 on end # SD
+		device ref gpp_bridge_2_2 on end # WWAN
+		device ref gpp_bridge_2_3 on end # WIFI
+		device ref gpp_bridge_2_4 on
+			# Required so the NVMe gets placed into D3 when entering S0i3.
+			chip drivers/pcie/rtd3/device
+				register "name" = ""NVME""
+				device pci 00.0 on end
+			end
+		end # NVMe SSD0
+		device ref gpp_bridge_a on  # Internal GPP Bridge 0 to Bus A
+			device ref gfx on end # Internal GPU (GFX)
+			device ref gfx_hda on end # Display HD Audio Controller (GFXAZ)
+			device ref crypto on end # Crypto Coprocessor
+			device ref xhci_0 on # USB 3.1 (USB0)
+				chip drivers/usb/acpi
+					device ref xhci_0_root_hub on
+						chip drivers/usb/acpi
+							device ref usb3_port2 on end
+						end
+						chip drivers/usb/acpi
+							device ref usb3_port3 on end
+						end
+						chip drivers/usb/acpi
+							device ref usb2_port2 on end
+						end
+						chip drivers/usb/acpi
+							device ref usb2_port3 on end
+						end
+						chip drivers/usb/acpi
+							device ref usb2_port4 on end
+						end
+						chip drivers/usb/acpi
+							device ref usb2_port5 on end
+						end
+						chip drivers/usb/acpi
+							device ref usb2_port6 on end
+						end
+					end
+				end
+			end
+			device ref xhci_1 on # USB 3.1 (USB1)
+				chip drivers/usb/acpi
+					device ref xhci_1_root_hub on
+						chip drivers/usb/acpi
+							device ref usb3_port7 on end
+						end
+						chip drivers/usb/acpi
+							device ref usb2_port7 on end
+						end
+					end
+				end
+			end
+			device ref acp on end # Audio Processor (ACP)
+		end
+		device ref gpp_bridge_c on  # Internal GPP Bridge 2 to Bus C
+			device ref usb4_xhci_0 on
+				chip drivers/usb/acpi
+					device ref usb4_xhci_0_root_hub on
+						chip drivers/usb/acpi
+							device ref usb3_port0 on end
+						end
+						chip drivers/usb/acpi
+							device ref usb2_port0 on end
+						end
+					end
+				end
+			end
+			device ref usb4_xhci_1 on
+				chip drivers/usb/acpi
+					device ref usb4_xhci_1_root_hub on
+						chip drivers/usb/acpi
+							device ref usb3_port1 on end
+						end
+						chip drivers/usb/acpi
+							device ref usb2_port1 on end
+						end
+					end
+				end
+			end
+		end
+	end
+
+	device ref i2c_0 on end
+	device ref i2c_1 on end
+	device ref i2c_2 on end
+	device ref i2c_3 on end
+	device ref uart_0 on end # UART0
+
+end
diff --git a/src/mainboard/amd/birman_plus/dsdt.asl b/src/mainboard/amd/birman_plus/dsdt.asl
new file mode 100644
index 000000000000..7b8982a645c4
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/dsdt.asl
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <acpi/acpi.h>
+DefinitionBlock (
+	"dsdt.aml",
+	"DSDT",
+	ACPI_DSDT_REV_2,
+	OEM_ID,
+	ACPI_TABLE_CREATOR,
+	0x00010001	/* OEM Revision */
+	)
+{
+	#include <acpi/dsdt_top.asl>
+
+	#include <soc.asl>
+}
diff --git a/src/mainboard/amd/birman_plus/early_gpio.c b/src/mainboard/amd/birman_plus/early_gpio.c
new file mode 100644
index 000000000000..4915996881ba
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/early_gpio.c
@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <gpio.h>
+#include "gpio.h"
+
+/* GPIO pins used by coreboot should be initialized in bootblock */
+
+static const struct soc_amd_gpio gpio_set_stage_reset[] = {
+	/* TPM CS */
+	PAD_NF(GPIO_29, SPI_TPM_CS_L, PULL_NONE),
+	/* ESPI_CS_L */
+	PAD_NF(GPIO_30, ESPI_CS_L, PULL_NONE),
+	/* ESPI_SOC_CLK */
+	PAD_NF(GPIO_77, SPI1_CLK, PULL_NONE),
+	/* ESPI_DATA0 */
+	PAD_NF(GPIO_81, SPI1_DAT0, PULL_NONE),
+	/* ESPI_DATA1 */
+	PAD_NF(GPIO_80, SPI1_DAT1, PULL_NONE),
+	/* ESPI_DATA2 */
+	PAD_NF(GPIO_68, SPI1_DAT2, PULL_NONE),
+	/* ESPI_DATA3 */
+	PAD_NF(GPIO_69, SPI1_DAT3, PULL_NONE),
+	/* ESPI_ALERT_L */
+	PAD_NF(GPIO_22, ESPI_ALERT_D1, PULL_NONE),
+	/* TPM IRQ */
+	PAD_INT(GPIO_130, PULL_NONE, EDGE_LOW, STATUS_DELIVERY),
+	/* SPI_ROM_REQ */
+	PAD_NF(GPIO_67, SPI_ROM_REQ, PULL_NONE),
+	/* SPI_ROM_GNT */
+	PAD_NF(GPIO_76, SPI_ROM_GNT, PULL_NONE),
+	/* KBRST_L */
+	PAD_NF(GPIO_21, KBRST_L, PULL_NONE),
+
+	/* Deassert PCIe Reset lines */
+	/* PCIE_RST0_L */
+	PAD_NFO(GPIO_26, PCIE_RST0_L, HIGH),
+	/* PCIE_RST1_L */
+	PAD_NFO(GPIO_27, PCIE_RST1_L, HIGH),
+	/* M2_SSD0_RST_L */
+	PAD_GPO(GPIO_78, HIGH),
+	/* M2_SSD1_RST_L */
+	PAD_GPO(GPIO_79, HIGH),
+
+	/* Enable UART 2 */
+	/* UART2_RXD */
+	PAD_NF(GPIO_136, UART2_RXD, PULL_NONE),
+	/* UART2_TXD */
+	PAD_NF(GPIO_138, UART2_TXD, PULL_NONE),
+	/* Enable UART 0 */
+	/* UART0_RXD */
+	PAD_NF(GPIO_141, UART0_RXD, PULL_NONE),
+	/* UART0_TXD */
+	PAD_NF(GPIO_143, UART0_TXD, PULL_NONE),
+	/* FANOUT0 */
+	PAD_NF(GPIO_85, FANOUT0, PULL_NONE),
+
+	/* I2C0 SCL */
+	PAD_NF(GPIO_145, I2C0_SCL, PULL_NONE),
+	/* I2C0 SDA */
+	PAD_NF(GPIO_146, I2C0_SDA, PULL_NONE),
+	/* I2C1 SCL */
+	PAD_NF(GPIO_147, I2C1_SCL, PULL_NONE),
+	/* I2C1 SDA */
+	PAD_NF(GPIO_148, I2C1_SDA, PULL_NONE),
+	/* I2C2_SCL */
+	PAD_NF(GPIO_113, I2C2_SCL, PULL_NONE),
+	/* I2C2_SDA */
+	PAD_NF(GPIO_114, I2C2_SDA, PULL_NONE),
+	/* I2C3_SCL */
+	PAD_NF(GPIO_19, I2C3_SCL, PULL_NONE),
+	/* I2C3_SDA */
+	PAD_NF(GPIO_20, I2C3_SDA, PULL_NONE),
+};
+
+void mainboard_program_early_gpios(void)
+{
+	gpio_configure_pads(gpio_set_stage_reset, ARRAY_SIZE(gpio_set_stage_reset));
+}
diff --git a/src/mainboard/amd/birman_plus/ec.c b/src/mainboard/amd/birman_plus/ec.c
new file mode 100644
index 000000000000..2ddc0492fb08
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/ec.c
@@ -0,0 +1,213 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <console/console.h>
+#include <ec/acpi/ec.h>
+#include <stdint.h>
+#include "ec.h"
+
+#define BIRMAN_EC_CMD	0x666
+#define BIRMAN_EC_DATA	0x662
+
+#define EC_GPIO_1_ADDR		0xA1
+#define   EC1_EVAL_PWREN	BIT(1)
+
+#define EC_GPIO_2_ADDR		0xA2
+#define   EC2_EVAL_SLOT_PWREN	BIT(5)
+#define   EC2_EVAL_19V_EN	BIT(2)
+
+#define EC_GPIO_3_ADDR		0xA3
+#define   EC3_WLAN_RST_AUX	BIT(5)
+#define   EC3_WWAN_RST_AUX	BIT(4)
+#define   EC3_SD_RST_AUX	BIT(3)
+#define   EC3_DT_RST_AUX	BIT(2)
+#define   EC3_LOM_RST_AUX	BIT(1)
+#define   EC3_EVAL_RST_AUX	BIT(0)
+
+#define EC_GPIO_7_ADDR		0xA7
+#define   EC7_WWAN_PWR_OFF_N	BIT(7)
+#define   EC7_BT_RADIO_DIS	BIT(2)
+#define   EC7_WL_RADIO_DIS	BIT(0)
+
+#define EC_GPIO_8_ADDR		0xA8
+#define   EC8_ADAPTER_OFF	BIT(5)
+#define   EC8_EVAL_SMBUS1_N_SW	BIT(3)
+#define   EC8_MP2_SEL		BIT(2)
+#define   EC8_DT_N_SSD1_SW	BIT(1)
+
+#define EC_GPIO_9_ADDR		0xA9
+#define   EC9_CAM0_PWR_EN	BIT(7)
+#define   EC9_CAM1_PWR_EN	BIT(6)
+#define   EC9_WWAN_RST		BIT(5)
+#define   EC9_DT_PWREN		BIT(2)
+#define   EC9_TPM_PWR_EN	BIT(1)
+#define   EC9_TPM_S0I3_N	BIT(0)
+
+#define EC_GPIO_A_ADDR		0xAA
+#define   ECA_MUX2_S0		BIT(7)
+#define   ECA_MUX2_S1		BIT(6)
+#define   ECA_MUX1_S0		BIT(5)
+#define   ECA_MUX1_S1		BIT(4)
+#define   ECA_MUX0_S0		BIT(3)
+#define   ECA_MUX0_S1		BIT(2)
+#define   ECA_SMBUS1_EN		BIT(1)
+#define   ECA_SMBUS0_EN		BIT(0)
+
+#define EC_GPIO_C_ADDR		0xAC
+#define   ECC_TPNL_BUF_EN	BIT(6)
+#define   ECC_TPAD_BUF_EN	BIT(5)
+#define   ECC_NFC_BUF_EN	BIT(4)
+
+#define EC_GPIO_D_ADDR		0xAD
+#define   ECD_TPNL_PWR_EN	BIT(7)
+#define   ECD_TPNL_EN		BIT(6)
+#define   ECD_SSD1_PWR_EN	BIT(5)
+#define   ECD_FPR_PWR_EN	BIT(3)
+#define   ECD_FPR_OFF_N		BIT(2)
+#define   ECD_FPR_LOCK_N	BIT(1)
+#define   ECD_TPAD_DISABLE_N	BIT(0)
+
+#define EC_GPIO_E_ADDR		0xAE
+#define   ECE_LOM_PWR_EN	BIT(7)
+#define   ECE_SSD0_PWR_EN	BIT(6)
+#define   ECE_SD_PWR_EN		BIT(5)
+#define   ECE_WLAN_PWR_EN	BIT(4)
+#define   ECE_WWAN_PWR_EN	BIT(3)
+#define   ECE_CAM_PWR_EN	BIT(2)
+#define   ECE_FPR_N_GBE_SEL	BIT(1)
+#define   ECE_BT_N_TPNL_SEL	BIT(0)
+
+#define EC_GPIO_F_ADDR		0xAF
+#define   ECF_CAM_FW_WP_N	BIT(7)
+#define   ECF_I2C_MUX_OE_N	BIT(4)
+#define   ECF_WLAN0_N_WWAN1_SW	BIT(1)
+#define   ECF_WWAN0_N_WLAN1_SW	BIT(0)
+
+#define EC_GPIO_G_ADDR	0xB0
+#define   ECG_IR_LED_PWR_EN	BIT(7)
+#define   ECG_U0_WLAN_HDR_SEL	BIT(6)
+#define   ECG_DT_SSD1_MUX_OFF	BIT(5)
+#define   ECG_WLAN_WWAN_MUX_OFF	BIT(4)
+
+static void configure_ec_gpio(void)
+{
+	uint8_t tmp;
+
+	tmp = ec_read(EC_GPIO_1_ADDR);
+	if (CONFIG(ENABLE_EVAL_CARD)) {
+		tmp |= EC1_EVAL_PWREN;
+	} else {
+		tmp &= ~EC1_EVAL_PWREN;
+	}
+	printk(BIOS_SPEW, "Write reg [0x%02x] = 0x%02x\n", EC_GPIO_1_ADDR, tmp);
+	ec_write(EC_GPIO_1_ADDR, tmp);
+
+	tmp = ec_read(EC_GPIO_2_ADDR);
+	if (CONFIG(ENABLE_EVAL_CARD)) {
+		tmp |= EC2_EVAL_SLOT_PWREN;
+		if (CONFIG(ENABLE_EVAL_19V)) {
+			tmp |= EC2_EVAL_19V_EN;
+		} else {
+			tmp &= ~EC2_EVAL_19V_EN;
+		}
+	} else {
+		tmp &= ~EC2_EVAL_SLOT_PWREN;
+		tmp &= ~EC2_EVAL_19V_EN;
+	}
+	printk(BIOS_SPEW, "Write reg [0x%02x] = 0x%02x\n", EC_GPIO_2_ADDR, tmp);
+	ec_write(EC_GPIO_2_ADDR, tmp);
+
+	tmp = ec_read(EC_GPIO_3_ADDR);
+	tmp |= EC3_WLAN_RST_AUX | EC3_WWAN_RST_AUX | EC3_SD_RST_AUX;
+	tmp |= EC3_DT_RST_AUX | EC3_LOM_RST_AUX | EC3_EVAL_RST_AUX;
+	printk(BIOS_SPEW, "Write reg [0x%02x] = 0x%02x\n", EC_GPIO_3_ADDR, tmp);
+	ec_write(EC_GPIO_3_ADDR, tmp);
+
+	tmp = ec_read(EC_GPIO_7_ADDR);
+	tmp &= ~EC7_BT_RADIO_DIS;
+	tmp &= ~EC7_WL_RADIO_DIS;
+	tmp |= EC7_WWAN_PWR_OFF_N;
+	printk(BIOS_SPEW, "Write reg [0x%02x] = 0x%02x\n", EC_GPIO_7_ADDR, tmp);
+	ec_write(EC_GPIO_7_ADDR, tmp);
+
+	tmp = ec_read(EC_GPIO_8_ADDR);
+	if (CONFIG(ENABLE_M2_SSD1_BIRMANPLUS)) {
+		tmp |= EC8_DT_N_SSD1_SW;
+	} else {
+		tmp &= ~EC8_DT_N_SSD1_SW;
+	}
+	printk(BIOS_SPEW, "Write reg [0x%02x] = 0x%02x\n", EC_GPIO_8_ADDR, tmp);
+	ec_write(EC_GPIO_8_ADDR, tmp);
+
+	tmp = ec_read(EC_GPIO_9_ADDR);
+	tmp |= EC9_CAM0_PWR_EN | EC9_CAM1_PWR_EN | EC9_WWAN_RST | EC9_TPM_PWR_EN;
+	if (CONFIG(ENABLE_DT_SLOT_BIRMANPLUS)) {
+		tmp |= EC9_DT_PWREN;
+	} else {
+		tmp &= ~EC9_DT_PWREN;
+	}
+	printk(BIOS_SPEW, "Write reg [0x%02x] = 0x%02x\n", EC_GPIO_9_ADDR, tmp);
+	ec_write(EC_GPIO_9_ADDR, tmp);
+
+	tmp = ECA_MUX1_S0 | ECA_SMBUS1_EN | ECA_SMBUS0_EN;
+	printk(BIOS_SPEW, "Write reg [0x%02x] = 0x%02x\n", EC_GPIO_A_ADDR, tmp);
+	ec_write(EC_GPIO_A_ADDR, tmp);
+
+	tmp = ec_read(EC_GPIO_C_ADDR);
+	tmp |= ECC_TPNL_BUF_EN | ECC_TPAD_BUF_EN | ECC_NFC_BUF_EN;
+	printk(BIOS_SPEW, "Write reg [0x%02x] = 0x%02x\n", EC_GPIO_C_ADDR, tmp);
+	ec_write(EC_GPIO_C_ADDR, tmp);
+
+	tmp = ec_read(EC_GPIO_D_ADDR);
+	tmp |= ECD_TPNL_PWR_EN | ECD_TPNL_EN | ECD_TPAD_DISABLE_N;
+	if (CONFIG(ENABLE_M2_SSD1_BIRMANPLUS)) {
+		tmp |= ECD_SSD1_PWR_EN;
+	} else {
+		tmp &= ~ECD_SSD1_PWR_EN;
+	}
+	printk(BIOS_SPEW, "Write reg [0x%02x] = 0x%02x\n", EC_GPIO_D_ADDR, tmp);
+	ec_write(EC_GPIO_D_ADDR, tmp);
+
+	tmp = ec_read(EC_GPIO_E_ADDR);
+	tmp |= ECE_LOM_PWR_EN | ECE_SSD0_PWR_EN | ECE_SD_PWR_EN;
+	tmp |= ECE_CAM_PWR_EN | ECE_FPR_N_GBE_SEL;
+	tmp &= ~ECE_BT_N_TPNL_SEL;
+	if (CONFIG(WLAN01_BIRMANPLUS)) {	// no WWAN, turn off WWAN power
+		tmp &= ~ECE_WWAN_PWR_EN;
+	} else {
+		tmp |= ECE_WWAN_PWR_EN;
+	}
+	if (CONFIG(WWAN01_BIRMANPLUS)) {	// no WLAN, turn off WLAN power
+		tmp &= ~ECE_WLAN_PWR_EN;
+	} else {
+		tmp |= ECE_WLAN_PWR_EN;
+	}
+	printk(BIOS_SPEW, "Write reg [0x%02x] = 0x%02x\n", EC_GPIO_E_ADDR, tmp);
+	ec_write(EC_GPIO_E_ADDR, tmp);
+
+	tmp = ec_read(EC_GPIO_F_ADDR);
+	if (CONFIG(WLAN01_BIRMANPLUS)) {
+		tmp |= ECF_WWAN0_N_WLAN1_SW;
+	} else {
+		tmp &= ~ECF_WWAN0_N_WLAN1_SW;
+	}
+	if (CONFIG(WWAN01_BIRMANPLUS)) {
+		tmp |= ECF_WLAN0_N_WWAN1_SW;
+	} else {
+		tmp &= ~ECF_WLAN0_N_WWAN1_SW;
+	}
+	printk(BIOS_SPEW, "Write reg [0x%02x] = 0x%02x\n", EC_GPIO_F_ADDR, tmp);
+	ec_write(EC_GPIO_F_ADDR, tmp);
+
+	tmp = ec_read(EC_GPIO_G_ADDR);
+	tmp &= ~ECG_DT_SSD1_MUX_OFF;
+	tmp &= ~ECG_WLAN_WWAN_MUX_OFF;
+	tmp |= ECG_IR_LED_PWR_EN | ECG_U0_WLAN_HDR_SEL;
+	printk(BIOS_SPEW, "Write reg [0x%02x] = 0x%02x\n", EC_GPIO_G_ADDR, tmp);
+	ec_write(EC_GPIO_G_ADDR, tmp);
+}
+
+void birman_ec_init(void)
+{
+	ec_set_ports(BIRMAN_EC_CMD, BIRMAN_EC_DATA);
+	configure_ec_gpio();
+}
diff --git a/src/mainboard/amd/birman_plus/ec.h b/src/mainboard/amd/birman_plus/ec.h
new file mode 100644
index 000000000000..d8e54db35ffc
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/ec.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef BIRMAN_EC_H
+#define BIRMAN_EC_H
+
+void birman_ec_init(void);
+
+#endif /* BIRMAN_EC_H */
diff --git a/src/mainboard/amd/birman_plus/gpio.c b/src/mainboard/amd/birman_plus/gpio.c
new file mode 100644
index 000000000000..74d929dbf16a
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/gpio.c
@@ -0,0 +1,191 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <gpio.h>
+#include "gpio.h"
+
+/*
+ * As a rule of thumb, GPIO pins used by coreboot should be initialized at
+ * bootblock while GPIO pins used only by the OS should be initialized at
+ * ramstage.
+ */
+static const struct soc_amd_gpio gpio_set_stage_ram[] = {
+	/* PWR_BTN_L */
+	PAD_NF(GPIO_0, PWR_BTN_L, PULL_NONE),
+	/* SYS_RESET_L */
+	PAD_NF(GPIO_1, SYS_RESET_L, PULL_NONE),
+	/* WAKE_L */
+	PAD_NF_SCI(GPIO_2, WAKE_L, PULL_NONE, EDGE_LOW),
+	/* PCIE_SD_WAKE_L */
+	PAD_SCI(GPIO_3, PULL_NONE, EDGE_LOW),
+	/* UART_WAKE_L_M2_APU */
+	PAD_SCI(GPIO_4, PULL_UP, EDGE_LOW),
+	/* MPM_EVENT_L, input or OD output */
+	PAD_GPI(GPIO_5, PULL_UP),
+	/* TPNL_INT_L */
+	PAD_SCI(GPIO_6, PULL_UP, EDGE_LOW),
+	/* EC SCI */
+	PAD_SCI(GPIO_7, PULL_UP, EDGE_LOW),
+	/* TPAD_INT_L */
+	PAD_SCI(GPIO_8, PULL_UP, EDGE_LOW),
+	/* SD_CARD_PRSNT_L */
+	PAD_GPI(GPIO_9, PULL_UP), /* Unclear if this needs to be SCI */
+	/* VDD_MEM_VID0 */
+	PAD_GPO(GPIO_10, HIGH),
+	/* HP_MIC_DET_L */
+	PAD_GPI(GPIO_11, PULL_UP),
+	/* ALIGN_FLAG_MU_L */
+	PAD_GPO(GPIO_12, HIGH),
+	/* GPIO_13 - GPIO_15: Not available */
+	/* USB_OC0_L */
+	PAD_NF(GPIO_16, USB_OC0_L, PULL_NONE),
+	/* WAKE_ON_WAN_L */
+	PAD_SCI(GPIO_17, PULL_UP, EDGE_LOW),
+	/* PCIE_WLAN_WAKE_L */
+	PAD_SCI(GPIO_18, PULL_UP, EDGE_LOW),
+	/* I2C3_SCL */
+	PAD_NF(GPIO_19, I2C3_SCL, PULL_NONE),
+	/* I2C3_SDA */
+	PAD_NF(GPIO_20, I2C3_SDA, PULL_NONE),
+	/* KBRST_L */
+	PAD_NF(GPIO_21, KBRST_L, PULL_NONE),
+	/* ESPI_ALERT_L */
+	PAD_NF(GPIO_22, ESPI_ALERT_D1, PULL_NONE),
+	/* AC_PRES */
+	PAD_NF(GPIO_23, AC_PRES, PULL_NONE),
+	/* PCIE_LOM_WAKE_L */
+	PAD_SCI(GPIO_24, PULL_UP, EDGE_LOW),
+	/* GPIO_25: Not available */
+	/* PCIE_RST0_L */
+	PAD_NFO(GPIO_26, PCIE_RST0_L, HIGH),
+	/* PCIE_RST1_L */
+	PAD_NFO(GPIO_27, PCIE_RST1_L, HIGH),
+	/* GPIO_28: Not available */
+	/* TPM CS */
+	PAD_NF(GPIO_29, SPI_TPM_CS_L, PULL_NONE),
+	/* ESPI_CS_L */
+	PAD_NF(GPIO_30, ESPI_CS_L, PULL_NONE),
+	/* INT_CLKREQ_L */
+	PAD_INT(GPIO_31, PULL_NONE, EDGE_LOW, STATUS_DELIVERY),
+	/* LPC_RST_L */
+	PAD_NF(GPIO_32, LPC_RST_L, PULL_NONE),
+	/* GPIO_33 - GPIO_37: Not available */
+	/* CLK_REQ5_L */
+	PAD_NF(GPIO_38, CLK_REQ5_L, PULL_NONE),
+	/* CLK_REQ6_L */
+	PAD_NF(GPIO_39, CLK_REQ6_L, PULL_NONE),
+	/* USB2_HDR_P0/1_SMI */
+	PAD_SCI(GPIO_40, PULL_UP, EDGE_LOW),
+	/* GPIO_41: Not available */
+	/* VDD_MEM_VID1 */
+	PAD_GPO(GPIO_42, HIGH),
+	/* GPIO_43 - GPIO_66: Not available */
+	/* SPI_ROM_REQ */
+	PAD_NF(GPIO_67, SPI_ROM_REQ, PULL_NONE),
+	/* ESPI_DATA2 */
+	PAD_NF(GPIO_68, SPI1_DAT2, PULL_NONE),
+	/* ESPI_DATA3 */
+	PAD_NF(GPIO_69, SPI1_DAT3, PULL_NONE),
+	/* SPI2_CLK */
+	PAD_NF(GPIO_70, SPI2_CLK, PULL_NONE),
+	/* GPIO_71 - GPIO_73: Not available */
+	/* APU_NFC_DWL_REQ_1V8 */
+	PAD_GPO(GPIO_74, LOW),
+	/* SPI2_CS1_L */
+	PAD_NF(GPIO_75, SPI2_CS1_L, PULL_NONE),
+	/* SPI_ROM_GNT */
+	PAD_NF(GPIO_76, SPI_ROM_GNT, PULL_NONE),
+	/* ESPI_SOC_CLK */
+	PAD_NF(GPIO_77, SPI1_CLK, PULL_NONE),
+	/* M2_SSD0_RST_L */
+	PAD_GPO(GPIO_78, HIGH),
+	/* M2_SSD1_RST_L */
+	PAD_GPO(GPIO_79, HIGH),
+	/* ESPI_DATA1 */
+	PAD_NF(GPIO_80, SPI1_DAT1, PULL_NONE),
+	/* ESPI_DATA0 */
+	PAD_NF(GPIO_81, SPI1_DAT0, PULL_NONE),
+	/* GPIO_82 - GPIO_83: Not available */
+	/* FANIN0 */
+	PAD_NF(GPIO_84, FANIN0, PULL_NONE),
+	/* FANOUT0 */
+	PAD_NF(GPIO_85, FANOUT0, PULL_NONE),
+	/* GPIO_86 - GPIO_88: Not available */
+	/* I2S CODEC INT */
+	PAD_SCI(GPIO_89, PULL_UP, EDGE_LOW),
+	/* ALERT_L_M2_SSD0 */
+	PAD_SCI(GPIO_90, PULL_UP, EDGE_LOW),
+	/* NFC IRQ */
+	PAD_SCI(GPIO_91, PULL_UP, EDGE_LOW),
+	/* CLK_REQ0_L */
+	PAD_NF(GPIO_92, CLK_REQ0_L, PULL_NONE),
+	/* GPIO_93 - GPIO_103: Not available */
+	/* SPI2_DAT0 */
+	PAD_NF(GPIO_104, SPI2_DAT0, PULL_NONE),
+	/* SPI2_DAT1 */
+	PAD_NF(GPIO_105, SPI2_DAT1, PULL_NONE),
+	/* SPI2_DAT2 */
+	PAD_NF(GPIO_106, SPI2_DAT2, PULL_NONE),
+	/* SPI2_DAT3 */
+	PAD_NF(GPIO_107, SPI2_DAT3, PULL_NONE),
+	/* GPIO_108 - GPIO_112: Not available */
+	/* I2C2_SCL */
+	PAD_NF(GPIO_113, I2C2_SCL, PULL_NONE),
+	/* I2C2_SDA */
+	PAD_NF(GPIO_114, I2C2_SDA, PULL_NONE),
+	/* CLK_REQ1_L */
+	PAD_NF(GPIO_115, CLK_REQ1_L, PULL_NONE),
+	/* CLK_REQ2_L */
+	PAD_NF(GPIO_116, CLK_REQ2_L, PULL_NONE),
+	/* GPIO_117 - GPIO_129: Not available */
+	/* TPM IRQ */
+	PAD_INT(GPIO_130, PULL_NONE, EDGE_LOW, STATUS_DELIVERY),
+	/* CLK_REQ3_L */
+	PAD_NF(GPIO_131, CLK_REQ3_L, PULL_NONE),
+	/* CLK_REQ4_L */
+	PAD_NF(GPIO_132, CLK_REQ4_L, PULL_NONE),
+	/* GPIO_133 - GPIO_134: Not available */
+	/* UART2_CTS_L */
+	PAD_NF(GPIO_135, UART2_CTS_L, PULL_NONE),
+	/* UART2_RXD */
+	PAD_NF(GPIO_136, UART2_RXD, PULL_NONE),
+	/* UART2_RTS_L */
+	PAD_NF(GPIO_137, UART2_RTS_L, PULL_NONE),
+	/* UART2_TXD */
+	PAD_NF(GPIO_138, UART2_TXD, PULL_NONE),
+	/* M2_SSD2_RST_L */
+	PAD_GPO(GPIO_139, HIGH),
+	/* UART0_CTS_L */
+	PAD_NF(GPIO_140, UART0_CTS_L, PULL_NONE),
+	/* UART0_RXD */
+	PAD_NF(GPIO_141, UART0_RXD, PULL_NONE),
+	/* UART0_RTS_L */
+	PAD_NF(GPIO_142, UART0_RTS_L, PULL_NONE),
+	/* UART0_TXD */
+	PAD_NF(GPIO_143, UART0_TXD, PULL_NONE),
+	/* M2_SSD3_RST_L */
+	PAD_GPO(GPIO_144, HIGH),
+	/* I2C0 SCL */
+	PAD_NF(GPIO_145, I2C0_SCL, PULL_NONE),
+	/* I2C0 SDA */
+	PAD_NF(GPIO_146, I2C0_SDA, PULL_NONE),
+	/* I2C1 SCL */
+	PAD_NF(GPIO_147, I2C1_SCL, PULL_NONE),
+	/* I2C1 SDA */
+	PAD_NF(GPIO_148, I2C1_SDA, PULL_NONE),
+	/* GPIO_149 - GPIO_152: Not available */
+	/* UART4_CTS_L */
+	PAD_NF(GPIO_153, UART4_CTS_L, PULL_NONE),
+	/* UART4_RTS_L */
+	PAD_NF(GPIO_154, UART4_RTS_L, PULL_NONE),
+	/* UART4_RXD */
+	PAD_NF(GPIO_155, UART4_RXD, PULL_NONE),
+	/* UART4_TXD */
+	PAD_NF(GPIO_156, UART4_TXD, PULL_NONE),
+	/* M2_SSD4_RST_L */
+	PAD_GPO(GPIO_157, HIGH),
+};
+
+void mainboard_program_gpios(void)
+{
+	gpio_configure_pads(gpio_set_stage_ram, ARRAY_SIZE(gpio_set_stage_ram));
+}
diff --git a/src/mainboard/amd/birman_plus/gpio.h b/src/mainboard/amd/birman_plus/gpio.h
new file mode 100644
index 000000000000..04c98c50df9e
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/gpio.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef MAINBOARD_GPIO_H
+#define MAINBOARD_GPIO_H
+
+void mainboard_program_early_gpios(void); /* bootblock GPIO configuration */
+void mainboard_program_gpios(void); /* ramstage GPIO configuration */
+
+#endif  /* MAINBOARD_GPIO_H */
diff --git a/src/mainboard/amd/birman_plus/mainboard.c b/src/mainboard/amd/birman_plus/mainboard.c
new file mode 100644
index 000000000000..0deba6710f44
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/mainboard.c
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <amdblocks/acpi.h>
+#include <amdblocks/amd_pci_util.h>
+#include <commonlib/helpers.h>
+#include <device/device.h>
+#include <types.h>
+#include "gpio.h"
+
+/* TODO: Update for birman */
+
+/* The IRQ mapping in fch_irq_map ends up getting written to the indirect address space that is
+   accessed via I/O ports 0xc00/0xc01. */
+
+/*
+ * This controls the device -> IRQ routing.
+ *
+ * Hardcoded IRQs:
+ *  0: timer < soc/amd/common/acpi/lpc.asl
+ *  1: i8042 - Keyboard
+ *  2: cascade
+ *  8: rtc0 <- soc/amd/common/acpi/lpc.asl
+ *  9: acpi <- soc/amd/common/acpi/lpc.asl
+ */
+static const struct fch_irq_routing fch_irq_map[] = {
+	{ PIRQ_A,	12,		PIRQ_NC },
+	{ PIRQ_B,	14,		PIRQ_NC },
+	{ PIRQ_C,	15,		PIRQ_NC },
+	{ PIRQ_D,	12,		PIRQ_NC },
+	{ PIRQ_E,	14,		PIRQ_NC },
+	{ PIRQ_F,	15,		PIRQ_NC },
+	{ PIRQ_G,	12,		PIRQ_NC },
+	{ PIRQ_H,	14,		PIRQ_NC },
+
+	{ PIRQ_SCI,	ACPI_SCI_IRQ,	ACPI_SCI_IRQ },
+	{ PIRQ_SDIO,	PIRQ_NC,	PIRQ_NC },
+	{ PIRQ_GPIO,	11,		11 },
+	{ PIRQ_I2C0,	10,		10 },
+	{ PIRQ_I2C1,	 7,		 7 },
+	{ PIRQ_I2C2,	 6,		 6 },
+	{ PIRQ_I2C3,	 5,		 5 },
+	{ PIRQ_UART0,	 4,		 4 },
+	{ PIRQ_UART1,	 3,		 3 },
+
+	/* The MISC registers are not interrupt numbers */
+	{ PIRQ_MISC,	0xfa,		0x00 },
+	{ PIRQ_MISC0,	0x91,		0x00 },
+	{ PIRQ_HPET_L,	0x00,		0x00 },
+	{ PIRQ_HPET_H,	0x00,		0x00 },
+};
+
+const struct fch_irq_routing *mb_get_fch_irq_mapping(size_t *length)
+{
+	*length = ARRAY_SIZE(fch_irq_map);
+	return fch_irq_map;
+}
+
+static void mainboard_init(void *chip_info)
+{
+	mainboard_program_gpios();
+}
+
+struct chip_operations mainboard_ops = {
+	.init = mainboard_init,
+};
diff --git a/src/mainboard/amd/birman_plus/port_descriptors.c b/src/mainboard/amd/birman_plus/port_descriptors.c
new file mode 100644
index 000000000000..85f448ec594d
--- /dev/null
+++ b/src/mainboard/amd/birman_plus/port_descriptors.c
@@ -0,0 +1,202 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <console/console.h>
+#include <device/i2c_simple.h>
+#include <gpio.h>
+#include <soc/platform_descriptors.h>
+#include <soc/soc_util.h>
+#include <types.h>
+
+#define phx_mxm_dxio_descriptor {			\
+	.engine_type = PCIE_ENGINE,			\
+	.port_present = CONFIG(ENABLE_EVAL_CARD),	\
+	.start_lane = 0,				\
+	.end_lane = 7,					\
+	.device_number = 1,				\
+	.function_number = 1,				\
+	.link_speed_capability = GEN_MAX,		\
+	.turn_off_unused_lanes = true,			\
+	.link_aspm = ASPM_L1,				\
+	.link_hotplug = HOTPLUG_DISABLED,		\
+	.clk_req = CLK_REQ0,				\
+	.port_params = {PP_PSPP_AC, 0x144, PP_PSPP_DC, 0x133}, \
+}
+
+#define ssd0_dxio_descriptor {				\
+	.engine_type = PCIE_ENGINE,			\
+	.port_present = true,				\
+	.start_lane = 16,				\
+	.end_lane = 19,					\
+	.device_number = 2,				\
+	.function_number = 4,				\
+	.link_speed_capability = GEN_MAX,		\
+	.turn_off_unused_lanes = true,			\
+	.link_aspm = ASPM_L1,				\
+	.link_hotplug = HOTPLUG_DISABLED,		\
+	.clk_req = CLK_REQ2, \
+	.port_params = {PP_PSPP_AC, 0x144, PP_PSPP_DC, 0x133}, \
+}
+
+#define wlan_dxio_descriptor {				\
+	.engine_type = PCIE_ENGINE,			\
+	.port_present = true,				\
+	.start_lane = 15,				\
+	.end_lane = 15,		                  \
+	.device_number = 2,				\
+	.function_number = 2,				\
+	.link_speed_capability = GEN_MAX,		\
+	.turn_off_unused_lanes = true,			\
+	.link_aspm = ASPM_L1,				\
+	.link_hotplug = HOTPLUG_DISABLED,		\
+	.clk_req = CLK_REQ3,				\
+}
+
+#define phx_ssd1_dxio_descriptor {			\
+	.engine_type = PCIE_ENGINE,			\
+	.port_present = true,		\
+	.start_lane = 8,				\
+	.end_lane = 11,					\
+	.device_number = 1,				\
+	.function_number = 2,				\
+	.link_speed_capability = GEN_MAX,		\
+	.turn_off_unused_lanes = true,			\
+	.link_aspm = ASPM_L1,				\
+	.link_hotplug = HOTPLUG_DISABLED,		\
+	.clk_req = CLK_REQ1,				\
+	.port_params = {PP_PSPP_AC, 0x144, PP_PSPP_DC, 0x133}, \
+}
+
+#define wwan_dxio_descriptor {				\
+	.engine_type = PCIE_ENGINE,			\
+	.port_present = true,				\
+	.start_lane = 12,				\
+	.end_lane = 12,		\
+	.device_number = 2,				\
+	.function_number = 3,				\
+	.link_speed_capability = GEN_MAX,		\
+	.turn_off_unused_lanes = true,			\
+	.link_aspm = ASPM_L1,				\
+	.link_hotplug = HOTPLUG_DISABLED,		\
+	.clk_req = CLK_REQ4,				\
+	.port_params = {PP_PSPP_AC, 0x144, PP_PSPP_DC, 0x133}, \
+}
+
+#define gbe_dxio_descriptor {				\
+	.engine_type = PCIE_ENGINE,			\
+	.port_present = true,				\
+	.start_lane = 13,				\
+	.end_lane = 13,					\
+	.device_number = 1,				\
+	.function_number = 3,			\
+	.link_speed_capability = GEN_MAX,			\
+	.turn_off_unused_lanes = true,			\
+	.link_aspm = ASPM_L1,				\
+	.link_hotplug = HOTPLUG_DISABLED,		\
+	.clk_req = CLK_REQ6,				\
+	.port_params = {PP_PSPP_AC, 0x144, PP_PSPP_DC, 0x133}, \
+}
+
+#define sd_dxio_descriptor {				\
+	.engine_type = PCIE_ENGINE,			\
+	.port_present = false,				\
+	.start_lane = 14,				\
+	.end_lane = 14,					\
+	.device_number = 2,				\
+	.function_number = 1,				\
+	.link_speed_capability = GEN_MAX,		\
+	.turn_off_unused_lanes = true,			\
+	.link_aspm = ASPM_L1,				\
+	.link_hotplug = HOTPLUG_DISABLED,		\
+	.clk_req = CLK_REQ5,				\
+	.port_params = {PP_PSPP_AC, 0x144, PP_PSPP_DC, 0x133}, \
+}
+
+static fsp_ddi_descriptor birmanplus_ddi_descriptors[] = {
+	{ /* DDI0 - eDP */
+		.connector_type = DDI_EDP,
+		.aux_index = DDI_AUX1,
+		.hdp_index = DDI_HDP1
+	},
+	{ /* DDI1 - HDMI/DP */
+		.connector_type = DDI_HDMI,
+		.aux_index = DDI_AUX2,
+		.hdp_index = DDI_HDP2
+	},
+	{ /* DDI2 - DP (type C) */
+		.connector_type = DDI_DP_W_TYPEC,
+		.aux_index = DDI_AUX3,
+		.hdp_index = DDI_HDP3,
+	},
+	{ /* DDI3 - DP (type C) */
+		.connector_type = DDI_DP_W_TYPEC,
+		.aux_index = DDI_AUX4,
+		.hdp_index = DDI_HDP4,
+	},
+	{ /* DDI4 - DP (type C) */
+		.connector_type = DDI_DP_W_TYPEC,
+		.aux_index = DDI_AUX5,
+		.hdp_index = DDI_HDP5,
+	}
+};
+
+static uint8_t get_ddi1_type(void)
+{
+	const uint8_t eeprom_i2c_bus = 2;
+	const uint8_t eeprom_i2c_address = 0x55;
+	const uint16_t eeprom_connector_type_offset = 2;
+	uint8_t eeprom_connector_type_data[2];
+	uint16_t connector_type;
+
+	if (i2c_2ba_read_bytes(eeprom_i2c_bus, eeprom_i2c_address,
+			       eeprom_connector_type_offset, eeprom_connector_type_data,
+			       sizeof(eeprom_connector_type_data))) {
+		printk(BIOS_NOTICE,
+		       "Display connector type couldn't be determined. Disabling DDI1.\n");
+		return DDI_UNUSED_TYPE;
+	}
+
+	connector_type = eeprom_connector_type_data[1] | eeprom_connector_type_data[0] << 8;
+
+	switch (connector_type) {
+	case 0x0c:
+		printk(BIOS_DEBUG, "Configuring DDI1 as HDMI.\n");
+		return DDI_HDMI;
+	case 0x13:
+		printk(BIOS_DEBUG, "Configuring DDI1 as DP.\n");
+		return DDI_DP;
+	case 0x14:
+		printk(BIOS_DEBUG, "Configuring DDI1 as eDP.\n");
+		return DDI_EDP;
+	case 0x17:
+		printk(BIOS_DEBUG, "Configuring DDI1 as USB-C.\n");
+		return DDI_DP_W_TYPEC;
+	default:
+		printk(BIOS_WARNING, "Unexpected display connector type %x. Disabling DDI1.\n",
+		       connector_type);
+		return DDI_UNUSED_TYPE;
+	}
+}
+
+
+void mainboard_get_dxio_ddi_descriptors(
+		const fsp_dxio_descriptor **dxio_descs, size_t *dxio_num,
+		const fsp_ddi_descriptor  **ddi_descs, size_t *ddi_num)
+{
+	birmanplus_ddi_descriptors[1].connector_type = get_ddi1_type();
+
+	printk(BIOS_DEBUG, "Using Birmanplus PHX DXIO\n");
+	static const fsp_dxio_descriptor birmanplus_phx_dxio_descriptors[] = {
+		phx_mxm_dxio_descriptor,
+		ssd0_dxio_descriptor,
+		wlan_dxio_descriptor,
+		phx_ssd1_dxio_descriptor,
+		wwan_dxio_descriptor,
+		gbe_dxio_descriptor,
+		sd_dxio_descriptor,
+	};
+
+	*dxio_descs = birmanplus_phx_dxio_descriptors;
+	*dxio_num = ARRAY_SIZE(birmanplus_phx_dxio_descriptors);
+	*ddi_descs = birmanplus_ddi_descriptors;
+	*ddi_num = ARRAY_SIZE(birmanplus_ddi_descriptors);
+}