summaryrefslogtreecommitdiff
path: root/config/coreboot/default/patches
diff options
context:
space:
mode:
Diffstat (limited to 'config/coreboot/default/patches')
-rw-r--r--config/coreboot/default/patches/0038-mb-dell-Add-Latitude-E5420-Sandy-Bridge.patch774
-rw-r--r--config/coreboot/default/patches/0039-fix-sata-ports-on-dell-9020-sff-and-mt.patch66
-rw-r--r--config/coreboot/default/patches/0040-nb-haswell-Disable-iGPU-when-dGPU-is-used.patch54
-rw-r--r--config/coreboot/default/patches/0041-nb-haswell-Fully-disable-iGPU-when-dGPU-is-used.patch51
-rw-r--r--config/coreboot/default/patches/0042-mb-dell-optiplex_9020-Implement-late-HWM-initializat.patch602
-rw-r--r--config/coreboot/default/patches/0043-mb-dell-optiplex_9020-Add-support-for-TPM1.2-device.patch49
6 files changed, 1596 insertions, 0 deletions
diff --git a/config/coreboot/default/patches/0038-mb-dell-Add-Latitude-E5420-Sandy-Bridge.patch b/config/coreboot/default/patches/0038-mb-dell-Add-Latitude-E5420-Sandy-Bridge.patch
new file mode 100644
index 00000000..11f95a63
--- /dev/null
+++ b/config/coreboot/default/patches/0038-mb-dell-Add-Latitude-E5420-Sandy-Bridge.patch
@@ -0,0 +1,774 @@
+From 7dd58c8b301404a8bafee25a1e97a8a5d614b3d6 Mon Sep 17 00:00:00 2001
+From: Nicholas Chin <nic.c3.14@gmail.com>
+Date: Mon, 4 Mar 2024 18:05:43 -0700
+Subject: [PATCH] mb/dell: Add Latitude E5420 (Sandy Bridge)
+
+---
+ src/mainboard/dell/e5420/Kconfig | 37 ++++
+ src/mainboard/dell/e5420/Kconfig.name | 2 +
+ src/mainboard/dell/e5420/Makefile.mk | 5 +
+ src/mainboard/dell/e5420/acpi/ec.asl | 9 +
+ src/mainboard/dell/e5420/acpi/platform.asl | 12 ++
+ src/mainboard/dell/e5420/acpi/superio.asl | 3 +
+ src/mainboard/dell/e5420/acpi_tables.c | 16 ++
+ src/mainboard/dell/e5420/board_info.txt | 6 +
+ src/mainboard/dell/e5420/cmos.default | 9 +
+ src/mainboard/dell/e5420/cmos.layout | 88 ++++++++++
+ src/mainboard/dell/e5420/data.vbt | Bin 0 -> 6144 bytes
+ src/mainboard/dell/e5420/devicetree.cb | 66 +++++++
+ src/mainboard/dell/e5420/dsdt.asl | 30 ++++
+ src/mainboard/dell/e5420/early_init.c | 32 ++++
+ src/mainboard/dell/e5420/gma-mainboard.ads | 20 +++
+ src/mainboard/dell/e5420/gpio.c | 195 +++++++++++++++++++++
+ src/mainboard/dell/e5420/hda_verb.c | 33 ++++
+ src/mainboard/dell/e5420/mainboard.c | 21 +++
+ 18 files changed, 584 insertions(+)
+ create mode 100644 src/mainboard/dell/e5420/Kconfig
+ create mode 100644 src/mainboard/dell/e5420/Kconfig.name
+ create mode 100644 src/mainboard/dell/e5420/Makefile.mk
+ create mode 100644 src/mainboard/dell/e5420/acpi/ec.asl
+ create mode 100644 src/mainboard/dell/e5420/acpi/platform.asl
+ create mode 100644 src/mainboard/dell/e5420/acpi/superio.asl
+ create mode 100644 src/mainboard/dell/e5420/acpi_tables.c
+ create mode 100644 src/mainboard/dell/e5420/board_info.txt
+ create mode 100644 src/mainboard/dell/e5420/cmos.default
+ create mode 100644 src/mainboard/dell/e5420/cmos.layout
+ create mode 100755 src/mainboard/dell/e5420/data.vbt
+ create mode 100644 src/mainboard/dell/e5420/devicetree.cb
+ create mode 100644 src/mainboard/dell/e5420/dsdt.asl
+ create mode 100644 src/mainboard/dell/e5420/early_init.c
+ create mode 100644 src/mainboard/dell/e5420/gma-mainboard.ads
+ create mode 100644 src/mainboard/dell/e5420/gpio.c
+ create mode 100644 src/mainboard/dell/e5420/hda_verb.c
+ create mode 100644 src/mainboard/dell/e5420/mainboard.c
+
+diff --git a/src/mainboard/dell/e5420/Kconfig b/src/mainboard/dell/e5420/Kconfig
+new file mode 100644
+index 0000000000..f4385045ae
+--- /dev/null
++++ b/src/mainboard/dell/e5420/Kconfig
+@@ -0,0 +1,37 @@
++if BOARD_DELL_LATITUDE_E5420
++
++config BOARD_SPECIFIC_OPTIONS
++ def_bool y
++ select BOARD_ROMSIZE_KB_6144
++ select EC_ACPI
++ select EC_DELL_MEC5035
++ select GFX_GMA_PANEL_1_ON_LVDS
++ select HAVE_ACPI_RESUME
++ select HAVE_ACPI_TABLES
++ select HAVE_CMOS_DEFAULT
++ select HAVE_OPTION_TABLE
++ select INTEL_GMA_HAVE_VBT
++ select INTEL_INT15
++ select MAINBOARD_HAS_LIBGFXINIT
++ select NORTHBRIDGE_INTEL_SANDYBRIDGE
++ select SERIRQ_CONTINUOUS_MODE
++ select SOUTHBRIDGE_INTEL_BD82X6X
++ select SYSTEM_TYPE_LAPTOP
++ select USE_NATIVE_RAMINIT
++
++config DRAM_RESET_GATE_GPIO
++ default 60
++
++config MAINBOARD_DIR
++ default "dell/e5420"
++
++config MAINBOARD_PART_NUMBER
++ default "Latitude E5420"
++
++config USBDEBUG_HCD_INDEX
++ default 2
++
++config VGA_BIOS_ID
++ default "8086,0116"
++
++endif # BOARD_DELL_LATITUDE_E5420
+diff --git a/src/mainboard/dell/e5420/Kconfig.name b/src/mainboard/dell/e5420/Kconfig.name
+new file mode 100644
+index 0000000000..eb495fb705
+--- /dev/null
++++ b/src/mainboard/dell/e5420/Kconfig.name
+@@ -0,0 +1,2 @@
++config BOARD_DELL_LATITUDE_E5420
++ bool "Latitude E5420"
+diff --git a/src/mainboard/dell/e5420/Makefile.mk b/src/mainboard/dell/e5420/Makefile.mk
+new file mode 100644
+index 0000000000..18391d8b18
+--- /dev/null
++++ b/src/mainboard/dell/e5420/Makefile.mk
+@@ -0,0 +1,5 @@
++bootblock-y += early_init.c
++bootblock-y += gpio.c
++romstage-y += early_init.c
++romstage-y += gpio.c
++ramstage-$(CONFIG_MAINBOARD_USE_LIBGFXINIT) += gma-mainboard.ads
+diff --git a/src/mainboard/dell/e5420/acpi/ec.asl b/src/mainboard/dell/e5420/acpi/ec.asl
+new file mode 100644
+index 0000000000..0d429410a9
+--- /dev/null
++++ b/src/mainboard/dell/e5420/acpi/ec.asl
+@@ -0,0 +1,9 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++
++Device(EC)
++{
++ Name (_HID, EISAID("PNP0C09"))
++ Name (_UID, 0)
++ Name (_GPE, 16)
++/* FIXME: EC support */
++}
+diff --git a/src/mainboard/dell/e5420/acpi/platform.asl b/src/mainboard/dell/e5420/acpi/platform.asl
+new file mode 100644
+index 0000000000..2d24bbd9b9
+--- /dev/null
++++ b/src/mainboard/dell/e5420/acpi/platform.asl
+@@ -0,0 +1,12 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++
++Method(_WAK, 1)
++{
++ /* FIXME: EC support */
++ Return(Package() {0, 0})
++}
++
++Method(_PTS,1)
++{
++ /* FIXME: EC support */
++}
+diff --git a/src/mainboard/dell/e5420/acpi/superio.asl b/src/mainboard/dell/e5420/acpi/superio.asl
+new file mode 100644
+index 0000000000..55b1db5b11
+--- /dev/null
++++ b/src/mainboard/dell/e5420/acpi/superio.asl
+@@ -0,0 +1,3 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++
++#include <drivers/pc80/pc/ps2_controller.asl>
+diff --git a/src/mainboard/dell/e5420/acpi_tables.c b/src/mainboard/dell/e5420/acpi_tables.c
+new file mode 100644
+index 0000000000..e2759659bf
+--- /dev/null
++++ b/src/mainboard/dell/e5420/acpi_tables.c
+@@ -0,0 +1,16 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++
++#include <acpi/acpi_gnvs.h>
++#include <soc/nvs.h>
++
++/* FIXME: check this function. */
++void mainboard_fill_gnvs(struct global_nvs *gnvs)
++{
++ /* The lid is open by default. */
++ gnvs->lids = 1;
++
++ /* Temperature at which OS will shutdown */
++ gnvs->tcrt = 100;
++ /* Temperature at which OS will throttle CPU */
++ gnvs->tpsv = 90;
++}
+diff --git a/src/mainboard/dell/e5420/board_info.txt b/src/mainboard/dell/e5420/board_info.txt
+new file mode 100644
+index 0000000000..34d5ad9e0b
+--- /dev/null
++++ b/src/mainboard/dell/e5420/board_info.txt
+@@ -0,0 +1,6 @@
++Category: laptop
++ROM package: SOIC-8
++ROM protocol: SPI
++ROM socketed: n
++Flashrom support: y
++Release year: 2011
+diff --git a/src/mainboard/dell/e5420/cmos.default b/src/mainboard/dell/e5420/cmos.default
+new file mode 100644
+index 0000000000..279415dfd1
+--- /dev/null
++++ b/src/mainboard/dell/e5420/cmos.default
+@@ -0,0 +1,9 @@
++boot_option=Fallback
++debug_level=Debug
++power_on_after_fail=Disable
++nmi=Enable
++bluetooth=Enable
++wwan=Enable
++wlan=Enable
++sata_mode=AHCI
++me_state=Disabled
+diff --git a/src/mainboard/dell/e5420/cmos.layout b/src/mainboard/dell/e5420/cmos.layout
+new file mode 100644
+index 0000000000..1aa7e77bce
+--- /dev/null
++++ b/src/mainboard/dell/e5420/cmos.layout
+@@ -0,0 +1,88 @@
++## SPDX-License-Identifier: GPL-2.0-only
++
++# -----------------------------------------------------------------
++entries
++
++# -----------------------------------------------------------------
++0 120 r 0 reserved_memory
++
++# -----------------------------------------------------------------
++# RTC_BOOT_BYTE (coreboot hardcoded)
++384 1 e 4 boot_option
++388 4 h 0 reboot_counter
++
++# -----------------------------------------------------------------
++# coreboot config options: console
++395 4 e 6 debug_level
++
++#400 8 r 0 reserved for century byte
++
++# coreboot config options: southbridge
++408 1 e 1 nmi
++409 2 e 7 power_on_after_fail
++411 1 e 9 sata_mode
++
++# coreboot config options: EC
++412 1 e 1 bluetooth
++413 1 e 1 wwan
++414 1 e 1 wlan
++
++# coreboot config options: ME
++424 1 e 14 me_state
++425 2 h 0 me_state_prev
++
++# coreboot config options: northbridge
++432 3 e 11 gfx_uma_size
++435 2 e 12 hybrid_graphics_mode
++440 8 h 0 volume
++
++# VBOOT
++448 128 r 0 vbnv
++
++# SandyBridge MRC Scrambler Seed values
++896 32 r 0 mrc_scrambler_seed
++928 32 r 0 mrc_scrambler_seed_s3
++960 16 r 0 mrc_scrambler_seed_chk
++
++# coreboot config options: check sums
++984 16 h 0 check_sum
++
++# -----------------------------------------------------------------
++
++enumerations
++
++#ID value text
++1 0 Disable
++1 1 Enable
++2 0 Enable
++2 1 Disable
++4 0 Fallback
++4 1 Normal
++6 0 Emergency
++6 1 Alert
++6 2 Critical
++6 3 Error
++6 4 Warning
++6 5 Notice
++6 6 Info
++6 7 Debug
++6 8 Spew
++7 0 Disable
++7 1 Enable
++7 2 Keep
++9 0 AHCI
++9 1 Compatible
++11 0 32M
++11 1 64M
++11 2 96M
++11 3 128M
++11 4 160M
++11 5 192M
++11 6 224M
++14 0 Normal
++14 1 Disabled
++
++# -----------------------------------------------------------------
++checksums
++
++checksum 392 447 984
+diff --git a/src/mainboard/dell/e5420/data.vbt b/src/mainboard/dell/e5420/data.vbt
+new file mode 100755
+index 0000000000000000000000000000000000000000..98b82fe6110fd295b5749041ec7f8c084ace5f57
+GIT binary patch
+literal 6144
+zcmeHKeQZ-z6hE);wSBvNZ!2$ObQ^;MgV6zl*Rhp}BXnCCMZU^_r7jRwT!kfLo8?3H
+zk9)u(7?cb(hChhTM57@QFfmbMB!G!dNsO6BW5OSp5EGF^jHnTTdhUBI+h`e+1ft1q
+z^SfW?+;h)4_uO+|XEfEV$91)<gOArWE)OnSTD}Ug6?8a~vz+SmQn!4~y3N7b^|hPp
+zR<5aEfv-b8M00Lk251!oO|8(YA6XaeXzkt-Z)@Ee!_{@z#Fro^?DqN4SGjRIu8KYp
+zZEufuU@5MM@7jv%h;75FS}ezKv?JDzCH}d%tE)A-GuDb*+B%}~w%88r>}c;!*XQ5O
+z)OU7u$J@4U+lk)#GSW%c%c)v`%R6?`w)LIyu6bD7-j0o&X9qUMcEsYlW3BU4rZRvt
+zqAUpjf*qXuLCCsU0YM2I5@gB1WKd)f1+Yt?%HWd0DZxYumP(K<LxTif8A39+!KMl}
+z31FHG)7?qk5g>e?=ER{f^&}W<0k@mxff(?6+Stw+s6y%k1mM$cLk#^FWWI*9bE1GY
+z&VY9?WC1u#23^3^UYw5?H0x2S2gN`x18Fko6_x(#MKyuCU_<D!mEp$qO_An}#@>DV
+zdkf*li41yW3p$*0Oo3+63kO6S91*KwP#l2i4jnc)JkUirL^$k}VbH0;CBh#BS=OLf
+zW-yE3BRon75gG{_2~QIC5cUzCC%i)FCmbidM>tIwAPf>N5Pl?FC0r*+Sq!oXj!keQ
+zVKcyK>TL+gc7oLco$28+FpeeXkEP}_Sea=mk#IWUR^m$!BogvszLPu83FJm0k6K<l
+z$#$~YiXtY*GpHp#@FvHJ1UnBD*H%d+{_j24XE4nmBa*?5mOWiold28s3}>*}<HaeO
+z+1|-8g2)FCfkDZIdb-Ub);z0#;XEbPfGe?A72!{DAUg|$m+Z~(i@h9j4gtm611ni(
+z#u>ACcP}M4exU`*MKVwl5+t6JBpTkmm}xWflKUe~7}`!#%z#gAo{NxUrpDAndYktu
+zI0}VLU`J7^xmF1AFiz5S^uzp*DPI$%$qq!(ikh0kP+(GKzF|@N?Y%_#Vp@M+xHr$F
+z=%+18z`-fT%z)9-TS$~Dh@2yeN7!UIt0h`fWxUu`JvA_ra*8P48l%7KR0&c1;0R75
+z4f0oz(xQ3MWqz5>qW5M4tZWExHs8<H(e1G@4km@5wEzOOP^x<l`YmA|eKs6j3wl8B
+z%C%;uygh%<#kGZ{fymL+OlV0!-*T!V5IB>X@p!@CBU=7e{5^Jl{s7by`po-AJqM2l
+znk(=^0bHkF0rUw7)^7j;$=_UIs8`6P6b-;vPDZ#U9L)W1_PAYRDP9k~;5$stt5ZiV
+zD0>;i-?OlYY2}P9WVnfGos4xee2r=EGWHR}ADH$VV>cO=xU?!4TjIi)OMBYI_PX#b
+zm-eBHed5BOT-x6*W>;{IqAga~G6lCQT93k>Q}CpsomJR*1%FjEkv?fuT%c-8RklXO
+zU8;6KWk*zeU)4TW+1D!mrE0EhHZfbBeN{4S7X@Pig%};A99QTdA~wZruL*8y?K!jP
+zG5R*k=);S}Zn<T;W!Mxt`(!+z7_r@3LVpf|FESauM&4}+wqzXfba-zG>A}on(uzNF
+zyu>BcjA})C@bg%<;+Eh2;Sz4heFFCbZ@C{FrXMIbYzu>?Bi-|vZ}JSFU%JA>7$7et
+z0Yo%CnOVZm#ZA}4kWZOn15};h5*#OM3b+6vHzgruMP>=5MNJK1y42{YgveP-!j%#(
+z0rGe@8t%!=66Ti%K4|Gx=o7gFp83wQ;+s3H7+r^SKlpp3KKcr!3@|n;NCH_=qL=3T
+zq3WH?en`b+W-HR-fnrhw*9aZ%M}lHX7@H?E>!6wv_&YQFEHdA$%Z1R--yub>=c@p?
+z6@7Fc$&>sAxwiz{BE$1kb$K9Co=ozlA973y^i(^BM|EZ$$^y`0KyHiMJ%O*XbfEX1
+ziZaH>W(1pWL0bo|T!x__N$^$DpmxI=bL6WUK3JGyn?rw-qC4ZA$yGjIB}N(=ldD2O
+zAJ@bxp<qR-3lIv<!P~SE8r*#_Ckl?$0|1fZ>2>n}u*mUIYFd>}O_wuwBD^r9<#=!0
+X1LGbT_rSOZ#yv3ZfpHH!G!Og(1Xg~J
+
+literal 0
+HcmV?d00001
+
+diff --git a/src/mainboard/dell/e5420/devicetree.cb b/src/mainboard/dell/e5420/devicetree.cb
+new file mode 100644
+index 0000000000..f26413557d
+--- /dev/null
++++ b/src/mainboard/dell/e5420/devicetree.cb
+@@ -0,0 +1,66 @@
++chip northbridge/intel/sandybridge # FIXME: GPU registers may not always apply.
++ register "gfx" = "GMA_STATIC_DISPLAYS(1)"
++ register "gpu_cpu_backlight" = "0x00000c31"
++ register "gpu_dp_b_hotplug" = "4"
++ register "gpu_dp_c_hotplug" = "4"
++ register "gpu_dp_d_hotplug" = "4"
++ register "gpu_panel_port_select" = "0"
++ register "gpu_panel_power_backlight_off_delay" = "2300"
++ register "gpu_panel_power_backlight_on_delay" = "2300"
++ register "gpu_panel_power_cycle_delay" = "6"
++ register "gpu_panel_power_down_delay" = "400"
++ register "gpu_panel_power_up_delay" = "400"
++ register "gpu_pch_backlight" = "0x13121312"
++
++ register "spd_addresses" = "{0x50, 0, 0x52, 0}"
++
++ device domain 0x0 on
++ subsystemid 0x1028 0x049b inherit
++
++ device ref host_bridge on end # Host bridge
++ device ref peg10 on end # PEG
++ device ref igd on end # iGPU
++
++ chip southbridge/intel/bd82x6x # Intel Series 6 Cougar Point PCH
++ register "docking_supported" = "1"
++ register "gen1_dec" = "0x007c0681"
++ register "gen2_dec" = "0x007c0901"
++ register "gen3_dec" = "0x003c07e1"
++ register "gen4_dec" = "0x001c0901"
++ register "gpi0_routing" = "2"
++ register "pcie_hotplug_map" = "{ 0, 0, 1, 0, 0, 0, 1, 0 }"
++ register "pcie_port_coalesce" = "1"
++ register "sata_interface_speed_support" = "0x3"
++ register "sata_port_map" = "0x3b"
++ register "spi_lvscc" = "0x2005"
++ register "spi_uvscc" = "0x2005"
++
++ device ref mei1 off end
++ device ref mei2 off end
++ device ref me_ide_r off end
++ device ref me_kt off end
++ device ref gbe off end
++ device ref ehci2 on end
++ device ref hda on end
++ device ref pcie_rp1 on end
++ device ref pcie_rp2 on end
++ device ref pcie_rp3 on end
++ device ref pcie_rp4 off end
++ device ref pcie_rp5 on end
++ device ref pcie_rp6 on end
++ device ref pcie_rp7 on end
++ device ref pcie_rp8 off end
++ device ref ehci1 on end
++ device ref pci_bridge off end
++ device ref lpc on
++ chip ec/dell/mec5035
++ device pnp ff.0 on end
++ end
++ end
++ device ref sata1 on end
++ device ref smbus on end
++ device ref sata2 off end
++ device ref thermal off end
++ end
++ end
++end
+diff --git a/src/mainboard/dell/e5420/dsdt.asl b/src/mainboard/dell/e5420/dsdt.asl
+new file mode 100644
+index 0000000000..7d13c55b08
+--- /dev/null
++++ b/src/mainboard/dell/e5420/dsdt.asl
+@@ -0,0 +1,30 @@
++#define BRIGHTNESS_UP \_SB.PCI0.GFX0.INCB
++#define BRIGHTNESS_DOWN \_SB.PCI0.GFX0.DECB
++/* SPDX-License-Identifier: GPL-2.0-only */
++
++
++#include <acpi/acpi.h>
++
++DefinitionBlock(
++ "dsdt.aml",
++ "DSDT",
++ ACPI_DSDT_REV_2,
++ OEM_ID,
++ ACPI_TABLE_CREATOR,
++ 0x20141018 /* OEM revision */
++)
++{
++ #include <acpi/dsdt_top.asl>
++ #include "acpi/platform.asl"
++ #include <cpu/intel/common/acpi/cpu.asl>
++ #include <southbridge/intel/common/acpi/platform.asl>
++ #include <southbridge/intel/bd82x6x/acpi/globalnvs.asl>
++ #include <southbridge/intel/common/acpi/sleepstates.asl>
++
++ Device (\_SB.PCI0)
++ {
++ #include <northbridge/intel/sandybridge/acpi/sandybridge.asl>
++ #include <drivers/intel/gma/acpi/default_brightness_levels.asl>
++ #include <southbridge/intel/bd82x6x/acpi/pch.asl>
++ }
++}
+diff --git a/src/mainboard/dell/e5420/early_init.c b/src/mainboard/dell/e5420/early_init.c
+new file mode 100644
+index 0000000000..7297921546
+--- /dev/null
++++ b/src/mainboard/dell/e5420/early_init.c
+@@ -0,0 +1,32 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++
++
++#include <bootblock_common.h>
++#include <device/pci_ops.h>
++#include <ec/dell/mec5035/mec5035.h>
++#include <southbridge/intel/bd82x6x/pch.h>
++
++const struct southbridge_usb_port mainboard_usb_ports[] = {
++ { 1, 1, 0 },
++ { 1, 1, 0 },
++ { 1, 1, 1 },
++ { 1, 1, 1 },
++ { 1, 1, 2 },
++ { 1, 1, 2 },
++ { 1, 1, 3 },
++ { 1, 1, 3 },
++ { 1, 1, 5 },
++ { 1, 1, 5 },
++ { 1, 1, 7 },
++ { 1, 1, 6 },
++ { 1, 1, 6 },
++ { 1, 1, 7 },
++};
++
++void bootblock_mainboard_early_init(void)
++{
++ pci_write_config16(PCH_LPC_DEV, LPC_EN, CNF1_LPC_EN | MC_LPC_EN
++ | KBC_LPC_EN | FDD_LPC_EN | LPT_LPC_EN
++ | COMB_LPC_EN | COMA_LPC_EN);
++ mec5035_early_init();
++}
+diff --git a/src/mainboard/dell/e5420/gma-mainboard.ads b/src/mainboard/dell/e5420/gma-mainboard.ads
+new file mode 100644
+index 0000000000..2a16f44360
+--- /dev/null
++++ b/src/mainboard/dell/e5420/gma-mainboard.ads
+@@ -0,0 +1,20 @@
++-- SPDX-License-Identifier: GPL-2.0-or-later
++
++with HW.GFX.GMA;
++with HW.GFX.GMA.Display_Probing;
++
++use HW.GFX.GMA;
++use HW.GFX.GMA.Display_Probing;
++
++private package GMA.Mainboard is
++
++ ports : constant Port_List :=
++ (
++ HDMI1, -- mainboard HDMI
++ DP2, -- dock DP
++ DP3, -- dock DP
++ Analog, -- mainboard VGA
++ LVDS,
++ others => Disabled);
++
++end GMA.Mainboard;
+diff --git a/src/mainboard/dell/e5420/gpio.c b/src/mainboard/dell/e5420/gpio.c
+new file mode 100644
+index 0000000000..f76b93d9f0
+--- /dev/null
++++ b/src/mainboard/dell/e5420/gpio.c
+@@ -0,0 +1,195 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++
++#include <southbridge/intel/common/gpio.h>
++
++static const struct pch_gpio_set1 pch_gpio_set1_mode = {
++ .gpio0 = GPIO_MODE_GPIO,
++ .gpio1 = GPIO_MODE_NATIVE,
++ .gpio2 = GPIO_MODE_GPIO,
++ .gpio3 = GPIO_MODE_GPIO,
++ .gpio4 = GPIO_MODE_GPIO,
++ .gpio5 = GPIO_MODE_NATIVE,
++ .gpio6 = GPIO_MODE_GPIO,
++ .gpio7 = GPIO_MODE_GPIO,
++ .gpio8 = GPIO_MODE_GPIO,
++ .gpio9 = GPIO_MODE_NATIVE,
++ .gpio10 = GPIO_MODE_NATIVE,
++ .gpio11 = GPIO_MODE_NATIVE,
++ .gpio12 = GPIO_MODE_GPIO,
++ .gpio13 = GPIO_MODE_GPIO,
++ .gpio14 = GPIO_MODE_GPIO,
++ .gpio15 = GPIO_MODE_GPIO,
++ .gpio16 = GPIO_MODE_NATIVE,
++ .gpio17 = GPIO_MODE_GPIO,
++ .gpio18 = GPIO_MODE_NATIVE,
++ .gpio19 = GPIO_MODE_GPIO,
++ .gpio20 = GPIO_MODE_NATIVE,
++ .gpio21 = GPIO_MODE_GPIO,
++ .gpio22 = GPIO_MODE_GPIO,
++ .gpio23 = GPIO_MODE_NATIVE,
++ .gpio24 = GPIO_MODE_GPIO,
++ .gpio25 = GPIO_MODE_NATIVE,
++ .gpio26 = GPIO_MODE_NATIVE,
++ .gpio27 = GPIO_MODE_GPIO,
++ .gpio28 = GPIO_MODE_GPIO,
++ .gpio29 = GPIO_MODE_GPIO,
++ .gpio30 = GPIO_MODE_GPIO,
++ .gpio31 = GPIO_MODE_NATIVE,
++};
++
++static const struct pch_gpio_set1 pch_gpio_set1_direction = {
++ .gpio0 = GPIO_DIR_INPUT,
++ .gpio2 = GPIO_DIR_INPUT,
++ .gpio3 = GPIO_DIR_INPUT,
++ .gpio4 = GPIO_DIR_INPUT,
++ .gpio6 = GPIO_DIR_INPUT,
++ .gpio7 = GPIO_DIR_INPUT,
++ .gpio8 = GPIO_DIR_INPUT,
++ .gpio12 = GPIO_DIR_OUTPUT,
++ .gpio13 = GPIO_DIR_INPUT,
++ .gpio14 = GPIO_DIR_INPUT,
++ .gpio15 = GPIO_DIR_INPUT,
++ .gpio17 = GPIO_DIR_INPUT,
++ .gpio19 = GPIO_DIR_INPUT,
++ .gpio21 = GPIO_DIR_INPUT,
++ .gpio22 = GPIO_DIR_INPUT,
++ .gpio24 = GPIO_DIR_INPUT,
++ .gpio27 = GPIO_DIR_INPUT,
++ .gpio28 = GPIO_DIR_INPUT,
++ .gpio29 = GPIO_DIR_INPUT,
++ .gpio30 = GPIO_DIR_OUTPUT,
++};
++
++static const struct pch_gpio_set1 pch_gpio_set1_level = {
++ .gpio12 = GPIO_LEVEL_HIGH,
++ .gpio30 = GPIO_LEVEL_HIGH,
++};
++
++static const struct pch_gpio_set1 pch_gpio_set1_reset = {
++};
++
++static const struct pch_gpio_set1 pch_gpio_set1_invert = {
++ .gpio0 = GPIO_INVERT,
++ .gpio8 = GPIO_INVERT,
++ .gpio14 = GPIO_INVERT,
++};
++
++static const struct pch_gpio_set1 pch_gpio_set1_blink = {
++};
++
++static const struct pch_gpio_set2 pch_gpio_set2_mode = {
++ .gpio32 = GPIO_MODE_NATIVE,
++ .gpio33 = GPIO_MODE_GPIO,
++ .gpio34 = GPIO_MODE_GPIO,
++ .gpio35 = GPIO_MODE_GPIO,
++ .gpio36 = GPIO_MODE_GPIO,
++ .gpio37 = GPIO_MODE_GPIO,
++ .gpio38 = GPIO_MODE_GPIO,
++ .gpio39 = GPIO_MODE_GPIO,
++ .gpio40 = GPIO_MODE_NATIVE,
++ .gpio41 = GPIO_MODE_NATIVE,
++ .gpio42 = GPIO_MODE_NATIVE,
++ .gpio43 = GPIO_MODE_NATIVE,
++ .gpio44 = GPIO_MODE_NATIVE,
++ .gpio45 = GPIO_MODE_NATIVE,
++ .gpio46 = GPIO_MODE_GPIO,
++ .gpio47 = GPIO_MODE_NATIVE,
++ .gpio48 = GPIO_MODE_GPIO,
++ .gpio49 = GPIO_MODE_NATIVE,
++ .gpio50 = GPIO_MODE_GPIO,
++ .gpio51 = GPIO_MODE_GPIO,
++ .gpio52 = GPIO_MODE_GPIO,
++ .gpio53 = GPIO_MODE_GPIO,
++ .gpio54 = GPIO_MODE_GPIO,
++ .gpio55 = GPIO_MODE_GPIO,
++ .gpio56 = GPIO_MODE_GPIO,
++ .gpio57 = GPIO_MODE_GPIO,
++ .gpio58 = GPIO_MODE_NATIVE,
++ .gpio59 = GPIO_MODE_NATIVE,
++ .gpio60 = GPIO_MODE_GPIO,
++ .gpio61 = GPIO_MODE_NATIVE,
++ .gpio62 = GPIO_MODE_NATIVE,
++ .gpio63 = GPIO_MODE_NATIVE,
++};
++
++static const struct pch_gpio_set2 pch_gpio_set2_direction = {
++ .gpio33 = GPIO_DIR_INPUT,
++ .gpio34 = GPIO_DIR_OUTPUT,
++ .gpio35 = GPIO_DIR_INPUT,
++ .gpio36 = GPIO_DIR_INPUT,
++ .gpio37 = GPIO_DIR_OUTPUT,
++ .gpio38 = GPIO_DIR_INPUT,
++ .gpio39 = GPIO_DIR_INPUT,
++ .gpio46 = GPIO_DIR_OUTPUT,
++ .gpio48 = GPIO_DIR_INPUT,
++ .gpio50 = GPIO_DIR_OUTPUT,
++ .gpio51 = GPIO_DIR_OUTPUT,
++ .gpio52 = GPIO_DIR_INPUT,
++ .gpio53 = GPIO_DIR_INPUT,
++ .gpio54 = GPIO_DIR_INPUT,
++ .gpio55 = GPIO_DIR_OUTPUT,
++ .gpio56 = GPIO_DIR_INPUT,
++ .gpio57 = GPIO_DIR_INPUT,
++ .gpio60 = GPIO_DIR_OUTPUT,
++};
++
++static const struct pch_gpio_set2 pch_gpio_set2_level = {
++ .gpio34 = GPIO_LEVEL_LOW,
++ .gpio37 = GPIO_LEVEL_LOW,
++ .gpio46 = GPIO_LEVEL_HIGH,
++ .gpio50 = GPIO_LEVEL_HIGH,
++ .gpio51 = GPIO_LEVEL_LOW,
++ .gpio55 = GPIO_LEVEL_LOW,
++ .gpio60 = GPIO_LEVEL_HIGH,
++};
++
++static const struct pch_gpio_set2 pch_gpio_set2_reset = {
++};
++
++static const struct pch_gpio_set3 pch_gpio_set3_mode = {
++ .gpio64 = GPIO_MODE_NATIVE,
++ .gpio65 = GPIO_MODE_NATIVE,
++ .gpio66 = GPIO_MODE_NATIVE,
++ .gpio67 = GPIO_MODE_NATIVE,
++ .gpio68 = GPIO_MODE_NATIVE,
++ .gpio69 = GPIO_MODE_NATIVE,
++ .gpio70 = GPIO_MODE_NATIVE,
++ .gpio71 = GPIO_MODE_NATIVE,
++ .gpio72 = GPIO_MODE_NATIVE,
++ .gpio73 = GPIO_MODE_NATIVE,
++ .gpio74 = GPIO_MODE_GPIO,
++ .gpio75 = GPIO_MODE_NATIVE,
++};
++
++static const struct pch_gpio_set3 pch_gpio_set3_direction = {
++ .gpio74 = GPIO_DIR_INPUT,
++};
++
++static const struct pch_gpio_set3 pch_gpio_set3_level = {
++};
++
++static const struct pch_gpio_set3 pch_gpio_set3_reset = {
++};
++
++const struct pch_gpio_map mainboard_gpio_map = {
++ .set1 = {
++ .mode = &pch_gpio_set1_mode,
++ .direction = &pch_gpio_set1_direction,
++ .level = &pch_gpio_set1_level,
++ .blink = &pch_gpio_set1_blink,
++ .invert = &pch_gpio_set1_invert,
++ .reset = &pch_gpio_set1_reset,
++ },
++ .set2 = {
++ .mode = &pch_gpio_set2_mode,
++ .direction = &pch_gpio_set2_direction,
++ .level = &pch_gpio_set2_level,
++ .reset = &pch_gpio_set2_reset,
++ },
++ .set3 = {
++ .mode = &pch_gpio_set3_mode,
++ .direction = &pch_gpio_set3_direction,
++ .level = &pch_gpio_set3_level,
++ .reset = &pch_gpio_set3_reset,
++ },
++};
+diff --git a/src/mainboard/dell/e5420/hda_verb.c b/src/mainboard/dell/e5420/hda_verb.c
+new file mode 100644
+index 0000000000..70e7c2e79a
+--- /dev/null
++++ b/src/mainboard/dell/e5420/hda_verb.c
+@@ -0,0 +1,33 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++
++#include <device/azalia_device.h>
++
++const u32 cim_verb_data[] = {
++ 0x111d76e7, /* Codec Vendor / Device ID: IDT */
++ 0x1028049b, /* Subsystem ID */
++ 11, /* Number of 4 dword sets */
++ AZALIA_SUBVENDOR(0, 0x1028049b),
++ AZALIA_PIN_CFG(0, 0x0a, 0x04a11020),
++ AZALIA_PIN_CFG(0, 0x0b, 0x0421101f),
++ AZALIA_PIN_CFG(0, 0x0c, 0x400000f0),
++ AZALIA_PIN_CFG(0, 0x0d, 0x90170110),
++ AZALIA_PIN_CFG(0, 0x0e, 0x23011050),
++ AZALIA_PIN_CFG(0, 0x0f, 0x23a1102e),
++ AZALIA_PIN_CFG(0, 0x10, 0x400000f3),
++ AZALIA_PIN_CFG(0, 0x11, 0x400000f0),
++ AZALIA_PIN_CFG(0, 0x1f, 0x400000f0),
++ AZALIA_PIN_CFG(0, 0x20, 0xd5a30130),
++
++ 0x80862805, /* Codec Vendor / Device ID: Intel */
++ 0x80860101, /* Subsystem ID */
++ 4, /* Number of 4 dword sets */
++ AZALIA_SUBVENDOR(3, 0x80860101),
++ AZALIA_PIN_CFG(3, 0x05, 0x18560010),
++ AZALIA_PIN_CFG(3, 0x06, 0x18560020),
++ AZALIA_PIN_CFG(3, 0x07, 0x18560030),
++
++};
++
++const u32 pc_beep_verbs[0] = {};
++
++AZALIA_ARRAY_SIZES;
+diff --git a/src/mainboard/dell/e5420/mainboard.c b/src/mainboard/dell/e5420/mainboard.c
+new file mode 100644
+index 0000000000..31e49802fc
+--- /dev/null
++++ b/src/mainboard/dell/e5420/mainboard.c
+@@ -0,0 +1,21 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++
++#include <device/device.h>
++#include <drivers/intel/gma/int15.h>
++#include <southbridge/intel/bd82x6x/pch.h>
++#include <ec/acpi/ec.h>
++#include <console/console.h>
++#include <pc80/keyboard.h>
++
++static void mainboard_enable(struct device *dev)
++{
++
++ /* FIXME: fix these values. */
++ install_intel_vga_int15_handler(GMA_INT15_ACTIVE_LFP_INT_LVDS,
++ GMA_INT15_PANEL_FIT_DEFAULT,
++ GMA_INT15_BOOT_DISPLAY_DEFAULT, 0);
++}
++
++struct chip_operations mainboard_ops = {
++ .enable_dev = mainboard_enable,
++};
+--
+2.44.0
+
diff --git a/config/coreboot/default/patches/0039-fix-sata-ports-on-dell-9020-sff-and-mt.patch b/config/coreboot/default/patches/0039-fix-sata-ports-on-dell-9020-sff-and-mt.patch
new file mode 100644
index 00000000..f4c3939c
--- /dev/null
+++ b/config/coreboot/default/patches/0039-fix-sata-ports-on-dell-9020-sff-and-mt.patch
@@ -0,0 +1,66 @@
+From 4889f08306f1530211dcc6f6a4e999c6cc72f3ac Mon Sep 17 00:00:00 2001
+From: Leah Rowe <info@minifree.org>
+Date: Sat, 30 Mar 2024 05:57:54 +0000
+Subject: [PATCH 1/1] fix sata ports on dell 9020 sff and mt
+
+mate kukri has a patch under review on coreboot that sets
+sata port map to 0x7 on sff and 0xf on mt.
+
+see: intel 8 series pch datasheet, section 13.1.35
+
+basically, the 6 least significant bits enable the sata
+slots; 1 for enable and 0 for disable. there can be up
+to 6 ports. least significant bit is port 0, then next
+is port 1, and so on.
+
+coreboot currently enables ports 0, 1, 4 and 5, making this
+value 0x33 (converted to binary: 00110011). sff has ports
+0, 1 and 2 wired, so mate changed that to 0x7 (00000111).
+
+on mt, the blue ports are ports 0 and 1, but the two white
+ports don't work, but coreboot enables 4 and 5; it is
+likely that the blue ports are in fact 0 and 1, and the
+white ports are 2 and 3, but we've not tested this!
+
+it could be that the blue ports are ports 4 and 5, and
+the white ports are 2 and 3! we have not yet determined
+this, but mate set it to 0xf, meaning ports 0 1 2 and 3
+are enabled, in his patch under review. the chance that
+it's 2, 3, 4 and 5 on the board is unlikely, but it is
+theoretically possible and has not been confirmed.
+
+therefore, for now, i will set the value to 0x3f, which
+in binary is 00111111, thus enabling all 6 slots. the two
+that aren't physically wired don't really matter. enabling
+ports (from the pch) that electrically aren't there and
+then powering on is electrically equivalent to those ports
+being actually being wired, but with no devices plugged
+into them. therefore, 0x3f is an effective shotgun fix.
+
+i'll remove this patch and use mate's fix when the latter
+has been tested on MT; it has already been tested on SFF.
+
+this patch fixes the 3rd sata slot on 9020 sff, and the 3rd
+and 4th sata slots on 9020 MT
+
+Signed-off-by: Leah Rowe <info@minifree.org>
+---
+ src/mainboard/dell/optiplex_9020/devicetree.cb | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/mainboard/dell/optiplex_9020/devicetree.cb b/src/mainboard/dell/optiplex_9020/devicetree.cb
+index c0b17a15ff..7bfa6736a6 100644
+--- a/src/mainboard/dell/optiplex_9020/devicetree.cb
++++ b/src/mainboard/dell/optiplex_9020/devicetree.cb
+@@ -23,7 +23,7 @@ chip northbridge/intel/haswell
+ register "gen2_dec" = "0x007c0901"
+ register "gen3_dec" = "0x003c07e1"
+ register "gen4_dec" = "0x001c0901"
+- register "sata_port_map" = "0x33"
++ register "sata_port_map" = "0x3f"
+
+ device pci 14.0 on end # xHCI controller
+ device pci 16.0 on end # Management Engine interface 1
+--
+2.39.2
+
diff --git a/config/coreboot/default/patches/0040-nb-haswell-Disable-iGPU-when-dGPU-is-used.patch b/config/coreboot/default/patches/0040-nb-haswell-Disable-iGPU-when-dGPU-is-used.patch
new file mode 100644
index 00000000..7a02d902
--- /dev/null
+++ b/config/coreboot/default/patches/0040-nb-haswell-Disable-iGPU-when-dGPU-is-used.patch
@@ -0,0 +1,54 @@
+From c6ce9c635e6576c86c546177c3d770dec2f3c9ae Mon Sep 17 00:00:00 2001
+From: Leah Rowe <info@minifree.org>
+Date: Fri, 23 Feb 2024 13:33:31 +0000
+Subject: [PATCH 1/1] nb/haswell: Disable iGPU when dGPU is used
+
+This is usually is handled by Haswell mrc.bin, disabling VGA
+decode on the iGPU when a dGPU is installed. However, Broadwell
+mrc.bin does not, so the iGPU and dGPU are both enabled.
+
+This patch disables legacy VGA cycles for iGPU, under such
+conditions. It has been tested on Broadwell mrc.bin when
+using a graphics card on Dell OptiPlex 9020 SFF (currently
+under review at this time of writing, submitted by Mate
+Kukri).
+
+This patch has also been tested when Haswell mrc.bin is used,
+and there are seemingly no breaking changes caused by it.
+
+Change-Id: I1df0a3aa42f8475b7741007bf3e28c2e089d916b
+Signed-off-by: Leah Rowe <info@minifree.org>
+Reviewed-on: https://review.coreboot.org/c/coreboot/+/80717
+Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
+Reviewed-by: Nico Huber <nico.h@gmx.de>
+---
+ src/northbridge/intel/haswell/gma.c | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/src/northbridge/intel/haswell/gma.c b/src/northbridge/intel/haswell/gma.c
+index 6e6948b70f..48a0ba54c7 100644
+--- a/src/northbridge/intel/haswell/gma.c
++++ b/src/northbridge/intel/haswell/gma.c
+@@ -461,12 +461,19 @@ static void gma_generate_ssdt(const struct device *dev)
+ drivers_intel_gma_displays_ssdt_generate(&chip->gfx);
+ }
+
++static void gma_func0_disable(struct device *dev)
++{
++ /* Disable VGA decode */
++ pci_or_config16(pcidev_on_root(0, 0), GGC, 1 << 1);
++}
++
+ static struct device_operations gma_func0_ops = {
+ .read_resources = pci_dev_read_resources,
+ .set_resources = pci_dev_set_resources,
+ .enable_resources = pci_dev_enable_resources,
+ .init = gma_func0_init,
+ .acpi_fill_ssdt = gma_generate_ssdt,
++ .vga_disable = gma_func0_disable,
+ .ops_pci = &pci_dev_ops_pci,
+ };
+
+--
+2.39.2
+
diff --git a/config/coreboot/default/patches/0041-nb-haswell-Fully-disable-iGPU-when-dGPU-is-used.patch b/config/coreboot/default/patches/0041-nb-haswell-Fully-disable-iGPU-when-dGPU-is-used.patch
new file mode 100644
index 00000000..bc8fd55c
--- /dev/null
+++ b/config/coreboot/default/patches/0041-nb-haswell-Fully-disable-iGPU-when-dGPU-is-used.patch
@@ -0,0 +1,51 @@
+From 0801b3ba8a0ce0109e30d27f405c912d5d705e9c Mon Sep 17 00:00:00 2001
+From: Leah Rowe <info@minifree.org>
+Date: Sat, 6 Apr 2024 01:22:47 +0100
+Subject: [PATCH 1/1] nb/haswell: Fully disable iGPU when dGPU is used
+
+My earlier patch disabled decode *and* disabled the iGPU itself, but
+a subsequent revision disabled only VGA decode. Upon revisiting, I
+found that, actually, yes, you also need to disable the iGPU entirely.
+
+Tested on Dell 9020 SFF using broadwell MRC, with both iGPU and dGPU.
+With this patch, the iGPU is completely disabled when you install a
+graphics card, but the iGPU is available to use when no graphics card
+is present.
+
+For more context, see:
+
+Author: Leah Rowe <info@minifree.org>
+Date: Fri Feb 23 13:33:31 2024 +0000
+
+ nb/haswell: Disable iGPU when dGPU is used
+
+And look at the Gerrit comments:
+
+https://review.coreboot.org/c/coreboot/+/80717/
+
+So, my original submission on change 80717 was actually correct.
+This patch fixes the issue. I tested on iGPU and dGPU, with both
+broadwell and haswell mrc.bin.
+
+Signed-off-by: Leah Rowe <info@minifree.org>
+---
+ src/northbridge/intel/haswell/gma.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/src/northbridge/intel/haswell/gma.c b/src/northbridge/intel/haswell/gma.c
+index 48a0ba54c7..f0b848852d 100644
+--- a/src/northbridge/intel/haswell/gma.c
++++ b/src/northbridge/intel/haswell/gma.c
+@@ -465,6 +465,9 @@ static void gma_func0_disable(struct device *dev)
+ {
+ /* Disable VGA decode */
+ pci_or_config16(pcidev_on_root(0, 0), GGC, 1 << 1);
++
++ /* Required or else the graphics card doesn't work */
++ dev->enabled = 0;
+ }
+
+ static struct device_operations gma_func0_ops = {
+--
+2.39.2
+
diff --git a/config/coreboot/default/patches/0042-mb-dell-optiplex_9020-Implement-late-HWM-initializat.patch b/config/coreboot/default/patches/0042-mb-dell-optiplex_9020-Implement-late-HWM-initializat.patch
new file mode 100644
index 00000000..37353e20
--- /dev/null
+++ b/config/coreboot/default/patches/0042-mb-dell-optiplex_9020-Implement-late-HWM-initializat.patch
@@ -0,0 +1,602 @@
+From c58e0fea2a4e591e5ecd8a1f376c3b3af0fbb306 Mon Sep 17 00:00:00 2001
+From: Mate Kukri <kukri.mate@gmail.com>
+Date: Thu, 18 Apr 2024 20:28:45 +0100
+Subject: [PATCH 1/1] mb/dell/optiplex_9020: Implement late HWM initialization
+
+There are 4 different chassis types specified by vendor firmware, each
+with a slightly different HWM configuration.
+
+The chassis type to use is determined at runtime by reading a set of
+4 PCH GPIOs: 70, 38, 17, and 1.
+
+Additionally vendor firmware also provides an option to run the fans at
+full speed. This is substituted with a coreboot nvram option in this
+implementation.
+
+This was tested to make fan control work on my OptiPlex 7020 SFF.
+
+NOTE: This is superficially similar to the OptiPlex 9010's SCH5545
+however the OptiPlex 9020's SCH5555 does not use externally
+programmed EC firmware.
+
+Change-Id: Ibdccd3fc7364e03e84ca606592928410624eed43
+Signed-off-by: Mate Kukri <kukri.mate@gmail.com>
+---
+ src/mainboard/dell/optiplex_9020/Makefile.inc | 3 +-
+ src/mainboard/dell/optiplex_9020/bootblock.c | 25 +-
+ src/mainboard/dell/optiplex_9020/cmos.default | 1 +
+ src/mainboard/dell/optiplex_9020/cmos.layout | 5 +-
+ src/mainboard/dell/optiplex_9020/mainboard.c | 387 ++++++++++++++++++
+ src/mainboard/dell/optiplex_9020/sch5555_ec.c | 54 +++
+ src/mainboard/dell/optiplex_9020/sch5555_ec.h | 10 +
+ 7 files changed, 463 insertions(+), 22 deletions(-)
+ create mode 100644 src/mainboard/dell/optiplex_9020/sch5555_ec.c
+ create mode 100644 src/mainboard/dell/optiplex_9020/sch5555_ec.h
+
+diff --git a/src/mainboard/dell/optiplex_9020/Makefile.inc b/src/mainboard/dell/optiplex_9020/Makefile.inc
+index 6ca2f2afaa..08e2e53577 100644
+--- a/src/mainboard/dell/optiplex_9020/Makefile.inc
++++ b/src/mainboard/dell/optiplex_9020/Makefile.inc
+@@ -2,4 +2,5 @@
+
+ romstage-y += gpio.c
+ ramstage-$(CONFIG_MAINBOARD_USE_LIBGFXINIT) += gma-mainboard.ads
+-bootblock-y += bootblock.c
++ramstage-y += sch5555_ec.c
++bootblock-y += bootblock.c sch5555_ec.c
+diff --git a/src/mainboard/dell/optiplex_9020/bootblock.c b/src/mainboard/dell/optiplex_9020/bootblock.c
+index 2837cf9cf1..e5e759273e 100644
+--- a/src/mainboard/dell/optiplex_9020/bootblock.c
++++ b/src/mainboard/dell/optiplex_9020/bootblock.c
+@@ -4,29 +4,14 @@
+ #include <device/pnp_ops.h>
+ #include <superio/smsc/sch555x/sch555x.h>
+ #include <southbridge/intel/lynxpoint/pch.h>
+-
+-static void ec_write(uint8_t addr1, uint16_t addr2, uint8_t val)
+-{
+- // Clear EC-to-Host mailbox
+- uint8_t tmp = inb(SCH555x_EMI_IOBASE + 1);
+- outb(tmp, SCH555x_EMI_IOBASE + 1);
+-
+- // Send address and value to the EC
+- sch555x_emi_write16(0, (addr1 * 2) | 0x101);
+- sch555x_emi_write32(4, val | (addr2 << 16));
+-
+- // Wait for acknowledgement message from EC
+- outb(1, SCH555x_EMI_IOBASE);
+- size_t timeout = 0;
+- do {} while (++timeout < 0xfff && (inb(SCH555x_EMI_IOBASE + 1) & 1) == 0);
+-}
++#include "sch5555_ec.h"
+
+ struct ec_init_entry {
+ uint16_t addr;
+ uint8_t val;
+ };
+
+-static void ec_init(void)
++static void bootblock_ec_init(void)
+ {
+ /*
+ * Tables from CORE_PEI
+@@ -108,9 +93,9 @@ void mainboard_config_superio(void)
+ outb(0x01, SCH555x_RUNTIME_IOBASE + SCH555x_RUNTIME_UNK1);
+ outb(0x0f, SCH555x_RUNTIME_IOBASE + SCH555x_RUNTIME_LED);
+
+- // Magic EC init
+- ec_init();
++ // Perform bootblock EC initialization
++ bootblock_ec_init();
+
+- // Magic EC init is needed for UART1 initialization to work
++ // Bootblock EC initialization is required for UART1 to work
+ sch555x_enable_serial(SERIAL_DEV, CONFIG_TTYS0_BASE);
+ }
+diff --git a/src/mainboard/dell/optiplex_9020/cmos.default b/src/mainboard/dell/optiplex_9020/cmos.default
+index 7bccc80e51..1909abcb9f 100644
+--- a/src/mainboard/dell/optiplex_9020/cmos.default
++++ b/src/mainboard/dell/optiplex_9020/cmos.default
+@@ -3,3 +3,4 @@ debug_level=Debug
+ nmi=Disable
+ power_on_after_fail=Disable
+ iommu=Disable
++fan_full_speed=Disable
+diff --git a/src/mainboard/dell/optiplex_9020/cmos.layout b/src/mainboard/dell/optiplex_9020/cmos.layout
+index 72ff9c4bee..4a1496a878 100644
+--- a/src/mainboard/dell/optiplex_9020/cmos.layout
++++ b/src/mainboard/dell/optiplex_9020/cmos.layout
+@@ -22,7 +22,10 @@ entries
+ 409 2 e 5 power_on_after_fail
+
+ # turn iommu on or off
+-412 1 e 6 iommu
++411 1 e 6 iommu
++
++# coreboot config options: EC
++412 1 e 1 fan_full_speed
+
+ # coreboot config options: check sums
+ 984 16 h 0 check_sum
+diff --git a/src/mainboard/dell/optiplex_9020/mainboard.c b/src/mainboard/dell/optiplex_9020/mainboard.c
+index c834fea5d3..0b7829c736 100644
+--- a/src/mainboard/dell/optiplex_9020/mainboard.c
++++ b/src/mainboard/dell/optiplex_9020/mainboard.c
+@@ -1,7 +1,12 @@
+ /* SPDX-License-Identifier: GPL-2.0-only */
+
++#include <bootstate.h>
++#include <cpu/x86/msr.h>
+ #include <device/device.h>
+ #include <drivers/intel/gma/int15.h>
++#include <option.h>
++#include <southbridge/intel/common/gpio.h>
++#include "sch5555_ec.h"
+
+ static void mainboard_enable(struct device *dev)
+ {
+@@ -13,3 +18,385 @@ static void mainboard_enable(struct device *dev)
+ struct chip_operations mainboard_ops = {
+ .enable_dev = mainboard_enable,
+ };
++
++#define HWM_TAB_ADD_TEMP_TARGET 1
++#define HWM_TAB_PKG_POWER_ANY 0xffff
++#define CHASSIS_TYPE_UNKNOWN 0xff
++
++struct hwm_tab_entry {
++ uint16_t addr;
++ uint8_t val;
++ uint8_t flags;
++ uint16_t pkg_power;
++};
++
++struct hwm_tab_entry HWM_TAB3[] = {
++ { 0x005, 0x33, 0, 0xffff },
++ { 0x018, 0x2f, 0, 0xffff },
++ { 0x019, 0x2f, 0, 0xffff },
++ { 0x01a, 0x2f, 0, 0xffff },
++ { 0x080, 0x00, 0, 0xffff },
++ { 0x081, 0x00, 0, 0xffff },
++ { 0x083, 0xbb, 0, 0xffff },
++ { 0x085, 0x8a, 0, 0x0010 },
++ { 0x086, 0x4c, 0, 0x0010 },
++ { 0x08a, 0x66, 0, 0x0010 },
++ { 0x08b, 0x5b, 0, 0x0010 },
++ { 0x090, 0x65, 0, 0xffff },
++ { 0x091, 0x70, 0, 0xffff },
++ { 0x092, 0x86, 0, 0xffff },
++ { 0x096, 0xa4, 0, 0xffff },
++ { 0x097, 0xa4, 0, 0xffff },
++ { 0x098, 0xa4, 0, 0xffff },
++ { 0x09b, 0xa4, 0, 0xffff },
++ { 0x0a0, 0x0e, 0, 0xffff },
++ { 0x0a1, 0x0e, 0, 0xffff },
++ { 0x0ae, 0x7c, 0, 0xffff },
++ { 0x0af, 0x86, 0, 0xffff },
++ { 0x0b0, 0x9a, 0, 0xffff },
++ { 0x0b3, 0x9a, 0, 0xffff },
++ { 0x0b6, 0x08, 0, 0xffff },
++ { 0x0b7, 0x08, 0, 0xffff },
++ { 0x0ea, 0x64, 0, 0x0020 },
++ { 0x0ea, 0x5c, 0, 0x0010 },
++ { 0x0ef, 0xff, 0, 0xffff },
++ { 0x0f8, 0x15, 0, 0xffff },
++ { 0x0f9, 0x00, 0, 0xffff },
++ { 0x0f0, 0x30, 0, 0xffff },
++ { 0x0fd, 0x01, 0, 0xffff },
++ { 0x1a1, 0x00, 0, 0xffff },
++ { 0x1a2, 0x00, 0, 0xffff },
++ { 0x1b1, 0x08, 0, 0xffff },
++ { 0x1be, 0x99, 0, 0xffff },
++ { 0x280, 0xa0, 0, 0x0010 },
++ { 0x281, 0x0f, 0, 0x0010 },
++ { 0x282, 0x03, 0, 0xffff },
++ { 0x283, 0x0a, 0, 0xffff },
++ { 0x284, 0x80, 0, 0xffff },
++ { 0x285, 0x03, 0, 0xffff },
++ { 0x288, 0x68, 0, 0x0010 },
++ { 0x289, 0x10, 0, 0x0010 },
++ { 0x28a, 0x03, 0, 0xffff },
++ { 0x28b, 0x0a, 0, 0xffff },
++ { 0x28c, 0x80, 0, 0xffff },
++ { 0x28d, 0x03, 0, 0xffff },
++};
++
++struct hwm_tab_entry HWM_TAB4[] = {
++ { 0x005, 0x33, 0, 0xffff },
++ { 0x018, 0x2f, 0, 0xffff },
++ { 0x019, 0x2f, 0, 0xffff },
++ { 0x01a, 0x2f, 0, 0xffff },
++ { 0x080, 0x00, 0, 0xffff },
++ { 0x081, 0x00, 0, 0xffff },
++ { 0x083, 0xbb, 0, 0xffff },
++ { 0x085, 0x99, 0, 0x0020 },
++ { 0x085, 0xad, 0, 0x0010 },
++ { 0x086, 0x1c, 0, 0xffff },
++ { 0x08a, 0x39, 0, 0x0020 },
++ { 0x08a, 0x41, 0, 0x0010 },
++ { 0x08b, 0x76, 0, 0x0020 },
++ { 0x08b, 0x8b, 0, 0x0010 },
++ { 0x090, 0x5e, 0, 0xffff },
++ { 0x091, 0x5e, 0, 0xffff },
++ { 0x092, 0x86, 0, 0xffff },
++ { 0x096, 0xa4, 0, 0xffff },
++ { 0x097, 0xa4, 0, 0xffff },
++ { 0x098, 0xa4, 0, 0xffff },
++ { 0x09b, 0xa4, 0, 0xffff },
++ { 0x0a0, 0x0a, 0, 0xffff },
++ { 0x0a1, 0x0a, 0, 0xffff },
++ { 0x0ae, 0x7c, 0, 0xffff },
++ { 0x0af, 0x7c, 0, 0xffff },
++ { 0x0b0, 0x9a, 0, 0xffff },
++ { 0x0b3, 0x7c, 0, 0xffff },
++ { 0x0b6, 0x08, 0, 0xffff },
++ { 0x0b7, 0x08, 0, 0xffff },
++ { 0x0ea, 0x64, 0, 0x0020 },
++ { 0x0ea, 0x5c, 0, 0x0010 },
++ { 0x0ef, 0xff, 0, 0xffff },
++ { 0x0f8, 0x15, 0, 0xffff },
++ { 0x0f9, 0x00, 0, 0xffff },
++ { 0x0f0, 0x30, 0, 0xffff },
++ { 0x0fd, 0x01, 0, 0xffff },
++ { 0x1a1, 0x00, 0, 0xffff },
++ { 0x1a2, 0x00, 0, 0xffff },
++ { 0x1b1, 0x08, 0, 0xffff },
++ { 0x1be, 0x90, 0, 0xffff },
++ { 0x280, 0x94, 0, 0x0020 },
++ { 0x281, 0x11, 0, 0x0020 },
++ { 0x280, 0x94, 0, 0x0010 },
++ { 0x281, 0x11, 0, 0x0010 },
++ { 0x282, 0x03, 0, 0xffff },
++ { 0x283, 0x0a, 0, 0xffff },
++ { 0x284, 0x80, 0, 0xffff },
++ { 0x285, 0x03, 0, 0xffff },
++ { 0x288, 0x28, 0, 0x0020 },
++ { 0x289, 0x0a, 0, 0x0020 },
++ { 0x288, 0x28, 0, 0x0010 },
++ { 0x289, 0x0a, 0, 0x0010 },
++ { 0x28a, 0x03, 0, 0xffff },
++ { 0x28b, 0x0a, 0, 0xffff },
++ { 0x28c, 0x80, 0, 0xffff },
++ { 0x28d, 0x03, 0, 0xffff },
++};
++
++struct hwm_tab_entry HWM_TAB5[] = {
++ { 0x005, 0x33, 0, 0xffff },
++ { 0x018, 0x2f, 0, 0xffff },
++ { 0x019, 0x2f, 0, 0xffff },
++ { 0x01a, 0x2f, 0, 0xffff },
++ { 0x080, 0x00, 0, 0xffff },
++ { 0x081, 0x00, 0, 0xffff },
++ { 0x083, 0xbb, 0, 0xffff },
++ { 0x085, 0x66, 0, 0x0020 },
++ { 0x085, 0x5d, 0, 0x0010 },
++ { 0x086, 0x1c, 0, 0xffff },
++ { 0x08a, 0x39, 0, 0x0020 },
++ { 0x08a, 0x41, 0, 0x0010 },
++ { 0x08b, 0x76, 0, 0x0020 },
++ { 0x08b, 0x80, 0, 0x0010 },
++ { 0x090, 0x5d, 0, 0x0020 },
++ { 0x090, 0x5e, 0, 0x0010 },
++ { 0x091, 0x5e, 0, 0xffff },
++ { 0x092, 0x86, 0, 0xffff },
++ { 0x096, 0xa4, 0, 0xffff },
++ { 0x097, 0xa4, 0, 0xffff },
++ { 0x098, 0xa3, 0, 0x0020 },
++ { 0x098, 0xa4, 0, 0x0010 },
++ { 0x09b, 0xa4, 0, 0xffff },
++ { 0x0a0, 0x08, 0, 0xffff },
++ { 0x0a1, 0x0a, 0, 0xffff },
++ { 0x0ae, 0x7c, 0, 0xffff },
++ { 0x0af, 0x7c, 0, 0xffff },
++ { 0x0b0, 0x9a, 0, 0xffff },
++ { 0x0b3, 0x7c, 0, 0xffff },
++ { 0x0b6, 0x08, 0, 0xffff },
++ { 0x0b7, 0x08, 0, 0xffff },
++ { 0x0ea, 0x64, 0, 0x0020 },
++ { 0x0ea, 0x5c, 0, 0x0010 },
++ { 0x0ef, 0xff, 0, 0xffff },
++ { 0x0f8, 0x15, 0, 0xffff },
++ { 0x0f9, 0x00, 0, 0xffff },
++ { 0x0f0, 0x30, 0, 0xffff },
++ { 0x0fd, 0x01, 0, 0xffff },
++ { 0x1a1, 0x00, 0, 0xffff },
++ { 0x1a2, 0x00, 0, 0xffff },
++ { 0x1b1, 0x08, 0, 0xffff },
++ { 0x1be, 0x98, 0, 0x0020 },
++ { 0x1be, 0x90, 0, 0x0010 },
++ { 0x280, 0x94, 0, 0x0020 },
++ { 0x281, 0x11, 0, 0x0020 },
++ { 0x280, 0x94, 0, 0x0010 },
++ { 0x281, 0x11, 0, 0x0010 },
++ { 0x282, 0x03, 0, 0xffff },
++ { 0x283, 0x0a, 0, 0xffff },
++ { 0x284, 0x80, 0, 0xffff },
++ { 0x285, 0x03, 0, 0xffff },
++ { 0x288, 0x28, 0, 0x0020 },
++ { 0x289, 0x0a, 0, 0x0020 },
++ { 0x288, 0x28, 0, 0x0010 },
++ { 0x289, 0x0a, 0, 0x0010 },
++ { 0x28a, 0x03, 0, 0xffff },
++ { 0x28b, 0x0a, 0, 0xffff },
++ { 0x28c, 0x80, 0, 0xffff },
++ { 0x28d, 0x03, 0, 0xffff },
++};
++
++struct hwm_tab_entry HWM_TAB6[] = {
++ { 0x005, 0x33, 0, 0xffff },
++ { 0x018, 0x2f, 0, 0xffff },
++ { 0x019, 0x2f, 0, 0xffff },
++ { 0x01a, 0x2f, 0, 0xffff },
++ { 0x080, 0x00, 0, 0xffff },
++ { 0x081, 0x00, 0, 0xffff },
++ { 0x083, 0xbb, 0, 0xffff },
++ { 0x085, 0x98, 0, 0xffff },
++ { 0x086, 0x3c, 0, 0xffff },
++ { 0x08a, 0x39, 0, 0x0020 },
++ { 0x08a, 0x3d, 0, 0x0010 },
++ { 0x08b, 0x44, 0, 0x0020 },
++ { 0x08b, 0x51, 0, 0x0010 },
++ { 0x090, 0x61, 0, 0xffff },
++ { 0x091, 0x6d, 0, 0xffff },
++ { 0x092, 0x86, 0, 0xffff },
++ { 0x096, 0xa4, 0, 0xffff },
++ { 0x097, 0xa4, 0, 0xffff },
++ { 0x098, 0x9f, 0, 0x0020 },
++ { 0x098, 0xa4, 0, 0x0010 },
++ { 0x09b, 0xa4, 0, 0xffff },
++ { 0x0a0, 0x0e, 0, 0xffff },
++ { 0x0a1, 0x0e, 0, 0xffff },
++ { 0x0ae, 0x7c, 0, 0xffff },
++ { 0x0af, 0x7c, 0, 0xffff },
++ { 0x0b0, 0x9b, 0, 0x0020 },
++ { 0x0b0, 0x98, 0, 0x0010 },
++ { 0x0b3, 0x9a, 0, 0xffff },
++ { 0x0b6, 0x08, 0, 0xffff },
++ { 0x0b7, 0x08, 0, 0xffff },
++ { 0x0ea, 0x64, 0, 0x0020 },
++ { 0x0ea, 0x5c, 0, 0x0010 },
++ { 0x0ef, 0xff, 0, 0xffff },
++ { 0x0f8, 0x15, 0, 0xffff },
++ { 0x0f9, 0x00, 0, 0xffff },
++ { 0x0f0, 0x30, 0, 0xffff },
++ { 0x0fd, 0x01, 0, 0xffff },
++ { 0x1a1, 0x00, 0, 0xffff },
++ { 0x1a2, 0x00, 0, 0xffff },
++ { 0x1b1, 0x08, 0, 0xffff },
++ { 0x1be, 0x9a, 0, 0x0020 },
++ { 0x1be, 0x96, 0, 0x0010 },
++ { 0x280, 0x94, 0, 0x0020 },
++ { 0x281, 0x11, 0, 0x0020 },
++ { 0x280, 0x94, 0, 0x0010 },
++ { 0x281, 0x11, 0, 0x0010 },
++ { 0x282, 0x03, 0, 0xffff },
++ { 0x283, 0x0a, 0, 0xffff },
++ { 0x284, 0x80, 0, 0xffff },
++ { 0x285, 0x03, 0, 0xffff },
++ { 0x288, 0x94, 0, 0x0020 },
++ { 0x289, 0x11, 0, 0x0020 },
++ { 0x288, 0x94, 0, 0x0010 },
++ { 0x289, 0x11, 0, 0x0010 },
++ { 0x28a, 0x03, 0, 0xffff },
++ { 0x28b, 0x0a, 0, 0xffff },
++ { 0x28c, 0x80, 0, 0xffff },
++ { 0x28d, 0x03, 0, 0xffff },
++};
++
++static uint8_t get_chassis_type(void)
++{
++ uint8_t gpio_chassis_type;
++
++ // Read chassis type from GPIO
++ gpio_chassis_type = get_gpio(70) << 3 | get_gpio(38) << 2 |
++ get_gpio(17) << 1 | get_gpio(1);
++
++ printk(BIOS_DEBUG, "GPIO chassis type = %#x\n", gpio_chassis_type);
++
++ // Turn it into internal chassis index
++ switch (gpio_chassis_type) {
++ case 0x08:
++ case 0x0a:
++ return 4;
++ case 0x0b:
++ return 3;
++ case 0x0c:
++ return 5;
++ case 0x0d: // SFF
++ case 0x0e:
++ case 0x0f:
++ return 6;
++ default:
++ return CHASSIS_TYPE_UNKNOWN;
++ }
++
++}
++
++static uint8_t get_temp_target(void)
++{
++ uint8_t val = rdmsr(0x1a2).lo >> 8 & 0xff;
++ if (!val)
++ val = 20;
++ return 0x95 - val;
++}
++
++static uint16_t get_pkg_power(void)
++{
++ uint8_t rapl_power_unit = rdmsr(0x606).lo & 0xf;
++ if (rapl_power_unit)
++ rapl_power_unit = 2 << (rapl_power_unit - 1);
++ uint16_t pkg_power_info = rdmsr(0x614).lo & 0x7fff;
++ if (pkg_power_info / rapl_power_unit > 0x41)
++ return 32;
++ else
++ return 16;
++}
++
++static void apply_hwm_tab(struct hwm_tab_entry *arr, size_t size)
++{
++ uint8_t temp_target = get_temp_target();
++ uint16_t pkg_power = get_pkg_power();
++
++ printk(BIOS_DEBUG, "Temp target = %#x\n", temp_target);
++ printk(BIOS_DEBUG, "Package power = %#x\n", pkg_power);
++
++ for (size_t i = 0; i < size; ++i) {
++ // Skip entry if it doesn't apply for this package power
++ if (arr[i].pkg_power != pkg_power &&
++ arr[i].pkg_power != HWM_TAB_PKG_POWER_ANY)
++ continue;
++
++ uint8_t val = arr[i].val;
++
++ // Add temp target to value if requested (current tables never do)
++ if (arr[i].flags & HWM_TAB_ADD_TEMP_TARGET)
++ val += temp_target;
++
++ // Perform write
++ ec_write(1, arr[i].addr, val);
++
++ }
++}
++
++static void sch5555_ec_hwm_init(void *arg)
++{
++ uint8_t chassis_type, saved_2fc;
++
++ printk(BIOS_DEBUG, "OptiPlex 9020 late HWM init\n");
++
++ saved_2fc = ec_read(1, 0x2fc);
++ ec_write(1, 0x2fc, 0xa0);
++ ec_write(1, 0x2fd, 0x32);
++
++ chassis_type = get_chassis_type();
++
++ if (chassis_type != CHASSIS_TYPE_UNKNOWN) {
++ printk(BIOS_DEBUG, "Chassis type = %#x\n", chassis_type);
++ } else {
++ printk(BIOS_DEBUG, "WARNING: Unknown chassis type\n");
++ }
++
++ // Apply HWM table based on chassis type
++ switch (chassis_type) {
++ case 3:
++ apply_hwm_tab(HWM_TAB3, ARRAY_SIZE(HWM_TAB3));
++ break;
++ case 4:
++ apply_hwm_tab(HWM_TAB4, ARRAY_SIZE(HWM_TAB4));
++ break;
++ case 5:
++ apply_hwm_tab(HWM_TAB5, ARRAY_SIZE(HWM_TAB5));
++ break;
++ case 6:
++ apply_hwm_tab(HWM_TAB6, ARRAY_SIZE(HWM_TAB6));
++ break;
++ }
++
++ // NOTE: vendor firmware applies these when "max core address" > 2
++ // i think this is always the case
++ ec_write(1, 0x9e, 0x30);
++ ec_write(1, 0xeb, ec_read(1, 0xea));
++
++ ec_write(1, 0x2fc, saved_2fc);
++
++ // Apply full speed fan config if requested or if the chassis type is unknown
++ if (chassis_type == CHASSIS_TYPE_UNKNOWN || get_uint_option("fan_full_speed", 0)) {
++ printk(BIOS_DEBUG, "Setting full fan speed\n");
++ ec_write(1, 0x80, 0x60 | ec_read(1, 0x80));
++ ec_write(1, 0x81, 0x60 | ec_read(1, 0x81));
++ }
++
++ ec_read(1, 0xb8);
++
++ if ((chassis_type == 4 || chassis_type == 5) && ec_read(1, 0x26) == 0) {
++ ec_write(1, 0xa0, ec_read(1, 0xa0) & 0xfb);
++ ec_write(1, 0xa1, ec_read(1, 0xa1) & 0xfb);
++ ec_write(1, 0xa2, ec_read(1, 0xa2) & 0xfb);
++ ec_write(1, 0x8a, 0x99);
++ ec_write(1, 0x8b, 0x47);
++ ec_write(1, 0x8c, 0x91);
++ }
++}
++
++BOOT_STATE_INIT_ENTRY(BS_POST_DEVICE, BS_ON_EXIT, sch5555_ec_hwm_init, NULL);
+diff --git a/src/mainboard/dell/optiplex_9020/sch5555_ec.c b/src/mainboard/dell/optiplex_9020/sch5555_ec.c
+new file mode 100644
+index 0000000000..a1067ac063
+--- /dev/null
++++ b/src/mainboard/dell/optiplex_9020/sch5555_ec.c
+@@ -0,0 +1,54 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++
++#include <arch/io.h>
++#include <device/pnp_ops.h>
++#include <superio/smsc/sch555x/sch555x.h>
++#include "sch5555_ec.h"
++
++uint8_t ec_read(uint8_t addr1, uint16_t addr2)
++{
++ // clear ec-to-host mailbox
++ uint8_t tmp = inb(SCH555x_EMI_IOBASE + 1);
++ outb(tmp, SCH555x_EMI_IOBASE + 1);
++
++ // send address
++ outw(0 | 0x8001, SCH555x_EMI_IOBASE + 2);
++ outw((addr1 * 2) | 0x100, SCH555x_EMI_IOBASE + 4);
++
++ outw(4 | 0x8002, SCH555x_EMI_IOBASE + 2);
++ outl(addr2 << 16, SCH555x_EMI_IOBASE + 4);
++
++ // send message to ec
++ outb(1, SCH555x_EMI_IOBASE);
++
++ // wait for ack
++ for (size_t retry = 0; retry < 0xfff; ++retry)
++ if (inb(SCH555x_EMI_IOBASE + 1) & 1)
++ break;
++
++ // read result
++ outw(4 | 0x8000, SCH555x_EMI_IOBASE + 2);
++ return inb(SCH555x_EMI_IOBASE + 4);
++}
++
++void ec_write(uint8_t addr1, uint16_t addr2, uint8_t val)
++{
++ // clear ec-to-host mailbox
++ uint8_t tmp = inb(SCH555x_EMI_IOBASE + 1);
++ outb(tmp, SCH555x_EMI_IOBASE + 1);
++
++ // send address and value
++ outw(0 | 0x8001, SCH555x_EMI_IOBASE + 2);
++ outw((addr1 * 2) | 0x101, SCH555x_EMI_IOBASE + 4);
++
++ outw(4 | 0x8002, SCH555x_EMI_IOBASE + 2);
++ outl(val | (addr2 << 16), SCH555x_EMI_IOBASE + 4);
++
++ // send message to ec
++ outb(1, SCH555x_EMI_IOBASE);
++
++ // wait for ack
++ for (size_t retry = 0; retry < 0xfff; ++retry)
++ if (inb(SCH555x_EMI_IOBASE + 1) & 1)
++ break;
++}
+diff --git a/src/mainboard/dell/optiplex_9020/sch5555_ec.h b/src/mainboard/dell/optiplex_9020/sch5555_ec.h
+new file mode 100644
+index 0000000000..7e399e8e74
+--- /dev/null
++++ b/src/mainboard/dell/optiplex_9020/sch5555_ec.h
+@@ -0,0 +1,10 @@
++/* SPDX-License-Identifier: GPL-2.0-only */
++
++#ifndef __SCH5555_EC_H__
++#define __SCH5555_EC_H__
++
++uint8_t ec_read(uint8_t addr1, uint16_t addr2);
++
++void ec_write(uint8_t addr1, uint16_t addr2, uint8_t val);
++
++#endif
+--
+2.39.2
+
diff --git a/config/coreboot/default/patches/0043-mb-dell-optiplex_9020-Add-support-for-TPM1.2-device.patch b/config/coreboot/default/patches/0043-mb-dell-optiplex_9020-Add-support-for-TPM1.2-device.patch
new file mode 100644
index 00000000..556e8e07
--- /dev/null
+++ b/config/coreboot/default/patches/0043-mb-dell-optiplex_9020-Add-support-for-TPM1.2-device.patch
@@ -0,0 +1,49 @@
+From cd3c553a313a26494e5dc31ff8323c3a919f190a Mon Sep 17 00:00:00 2001
+From: Mate Kukri <kukri.mate@gmail.com>
+Date: Wed, 10 Apr 2024 20:31:35 +0100
+Subject: [PATCH 1/1] mb/dell/optiplex_9020: Add support for TPM1.2 device
+
+These machines come with a TPM1.2 device by default. It is somewhat
+obsolete these days, but there is no harm in enabling it.
+
+Change-Id: Iec05321862aed58695c256b00494e5953219786d
+Signed-off-by: Mate Kukri <kukri.mate@gmail.com>
+Reviewed-on: https://review.coreboot.org/c/coreboot/+/81827
+Reviewed-by: Angel Pons <th3fanbus@gmail.com>
+Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
+---
+ src/mainboard/dell/optiplex_9020/Kconfig | 2 ++
+ src/mainboard/dell/optiplex_9020/devicetree.cb | 3 +++
+ 2 files changed, 5 insertions(+)
+
+diff --git a/src/mainboard/dell/optiplex_9020/Kconfig b/src/mainboard/dell/optiplex_9020/Kconfig
+index 774a72f161..296938aa8d 100644
+--- a/src/mainboard/dell/optiplex_9020/Kconfig
++++ b/src/mainboard/dell/optiplex_9020/Kconfig
+@@ -12,7 +12,9 @@ config BOARD_SPECIFIC_OPTIONS
+ select INTEL_GMA_HAVE_VBT
+ select INTEL_INT15
+ select MAINBOARD_HAS_LIBGFXINIT
++ select MAINBOARD_HAS_TPM1
+ select MAINBOARD_USES_IFD_GBE_REGION
++ select MEMORY_MAPPED_TPM
+ select NORTHBRIDGE_INTEL_HASWELL
+ select SERIRQ_CONTINUOUS_MODE
+ select SOUTHBRIDGE_INTEL_LYNXPOINT
+diff --git a/src/mainboard/dell/optiplex_9020/devicetree.cb b/src/mainboard/dell/optiplex_9020/devicetree.cb
+index 7bfa6736a6..e5cbd64127 100644
+--- a/src/mainboard/dell/optiplex_9020/devicetree.cb
++++ b/src/mainboard/dell/optiplex_9020/devicetree.cb
+@@ -70,6 +70,9 @@ chip northbridge/intel/haswell
+ device pnp 2e.b off end # Floppy Controller
+ device pnp 2e.11 off end # Parallel Port
+ end
++ chip drivers/pc80/tpm
++ device pnp 0c31.0 on end
++ end
+ end
+ device pci 1f.2 on end # SATA controller 1
+ device pci 1f.3 on end # SMBus
+--
+2.39.2
+