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+title: Flashing coreboot on a Lenovo Thinkpad X200 with a Raspberry Pi Tutorial
+author: Andreas
+date: 2022-01-13 21:14
+tags: Lenovo Thinkpad X200, coreboot, flashrom, Raspberry Pi, ch341a
+---
+
+In this tutorial, we will go through the steps to get [coreboot](https://www.coreboot.org/) compiled and flashed on a **Lenovo Thinkpad X200** laptop.
+
+We'll also change the Wifi card so that Wifi will work with a libre kernel driver.
+
+# Prerequisites
+
+![Prerequisites](/static/blog/media/x200/01-prerequisites.jpg)
+
+Things you need:
+
+- Lenovo Thinkpad X200
+- Atheros AR9382 AR5BHB116 Mini PCIE Dual Band Wifi card
+- Raspberry Pi or ch341a USB programmer
+- Pomona 5252 SOIC-16 clip
+- 6 x 10 cm female - female jumper wires
+- Screwdriver
+
+This tutorial assumes you're using a GNU/Linux distro and are familiar
+with how to use a terminal.
+
+[Debian GNU/Linux](https://www.debian.org/) 11 (bullseye) was used to
+compile the coreboot image produced in this tutorial.
+
+Files needed:
+
+[`dejavusansmono.pf2`](/static/blog/media/x200/dejavusansmono.pf2)\
+[`grub.cfg`](/static/blog//media/x200/grub.cfg)\
+[`background.jpg`](/static/blog/media/x200/background.jpg)
+
+For more information about DejaVu Fonts, see:\
+[https://dejavu-fonts.github.io/](https://dejavu-fonts.github.io/)
+
+For DejaVu Font license, see:\
+[https://dejavu-fonts.github.io/License.html](https://dejavu-fonts.github.io/License.html)
+
+'**background.jpg**' is borrowed from the libreboot project and it's license
+information is as follows:
+
+```plaintext
+These images are based on http://libreboot.org/logo/logo.svg
+which is Copyright 2014 Marcus Moeller and released under CC-0
+https://creativecommons.org/publicdomain/zero/1.0/legalcode
+```
+
+# Packages needed to compile flashrom/coreboot/grub
+
+```sh
+sudo apt-get build-dep flashrom grub
+sudo apt-get install git build-essential gnat flex bison libncurses5-dev libfreetype-dev pkg-config unifont wget
+```
+
+# Compile flashrom
+
+Clone flashrom git repository:
+
+```sh
+git clone https://review.coreboot.org/flashrom.git
+```
+
+Compile flashrom:
+
+```sh
+cd flashrom
+sudo make install
+sudo cp /usr/local/sbin/flashrom /usr/local/bin/
+```
+
+# Compile GRUB
+
+See '**Prerequisites**' above for the files needed.
+
+Clone GRUB git repository:
+
+```sh
+git clone https://git.savannah.gnu.org/git/grub.git
+```
+
+Compile GRUB:
+
+```sh
+cd grub
+./bootstrap
+./configure --with-platform=coreboot
+make -j4
+```
+
+Create '**pack-payload-minimal.sh**' script file:
+
+```sh
+touch pack-payload-minimal.sh
+chmod +x pack-payload-minimal.sh
+```
+
+Paste the following in '**pack-payload-minimal.sh**':
+
+```sh
+#! /bin/bash
+
+# ./pack-payload-minimal.sh – To be invoked within GRUB project folder, packs
+# an executable elf payload file for the coreboot project, using just one
+# keyboard layout file. Adapt “settings” to your needs. Specify a lighter
+# pf2-fontfile if available on your system.
+
+# settings
+elf_output="grub2.elf"
+#pf2_fontfile="unicode.pf2"
+pf2_fontfile="dejavusansmono.pf2"
+keyboard_layout="se"
+grub_modules="cbfs"
+
+# generate keyboard layout
+ckbcomp "${keyboard_layout}" | ./grub-mklayout -o "${keyboard_layout}.gkb"
+
+# pack the GRUB payload file
+./grub-mkstandalone \
+        --grub-mkimage=./grub-mkimage \
+        -O i386-coreboot \
+        -o "${elf_output}" \
+        -d grub-core \
+        --fonts= \
+        --themes= \
+        --locales= \
+        --modules="${grub_modules}" \
+        /boot/grub/grub.cfg=coreboot.cfg \
+        /boot/grub/fonts/${pf2_fontfile}="${pf2_fontfile}" \
+        /boot/grub/layouts/${keyboard_layout}.gkb="${keyboard_layout}.gkb"
+
+# message
+echo "Payload ${elf_output} has been packed with:"
+echo " * fontfile: ${pf2_fontfile}"
+echo " * keyboard layout: ${keyboard_layout}"
+echo " * GRUB modules, to be preloaded: ${grub_modules}"
+
+# code snippet suggestion
+echo "Don't forget to add 'keymap ${keyboard_layout}' to your GRUB Configuration File."
+
+# clean up
+rm "${keyboard_layout}.gkb"
+```
+
+Execute the script to create '**grub2.elf**' file:
+
+```sh
+./pack-payload-minimal.sh
+```
+
+# Connect programmer to flash chip
+
+See [`Setup Raspberry Pi for flashing with flashrom Tutorial`](../../2022/setup-raspberry-pi-for-flashing-with-flashrom-tutorial/)
+if you're using a Raspberry Pi.
+
+Remove the following parts to access the flash chip:
+
+```plaintext
+Battery
+Keyboard
+Palmrest
+```
+
+![Connect programmer](/static/blog/media/x200/02-lenovo-thinkpad-x200-internals.jpg)
+
+Connect Pomona 5252 to flash chip like this:
+
+```plaintext
+Screen (furthest from you)
+             __
+   N/C  1 --|  |-- 9   MISO
+   GND  2 --|  |-- 10  CS
+   N/C  3 --|  |-- 11  N/C
+   N/C  4 --|  |-- 12  N/C
+   N/C  5 --|  |-- 13  N/C
+   N/C  6 --|  |-- 14  N/C
+  MOSI  7 --|  |-- 15  3.3V
+   CLK  8 --|__|-- 16  N/C
+
+   N/C = Not connected / Not used
+
+   Edge (closest to you)
+```
+
+![ch341a USB programmer connected](/static/blog/media/x200/03-raspberry-pi-connected.jpg)
+
+# Read Factory BIOS
+
+Read Factory BIOS 3 times if using **Raspberry Pi**:
+
+```sh
+sudo flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=32768 -r factory_bios_01.rom -V
+sudo flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=32768 -r factory_bios_02.rom -V
+sudo flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=32768 -r factory_bios_03.rom -V
+```
+
+Read Factory BIOS 3 times if using **ch341a**:
+
+```sh
+sudo flashrom -p ch341a_spi -r factory_bios_01.rom -V
+sudo flashrom -p ch341a_spi -r factory_bios_02.rom -V
+sudo flashrom -p ch341a_spi -r factory_bios_03.rom -V
+```
+
+Make sure checksums are identical:
+
+```sh
+sha512sum *.rom
+```
+
+# Download coreboot
+
+Download coreboot:
+
+```sh
+wget https://coreboot.org/releases/coreboot-4.15.tar.xz
+wget https://coreboot.org/releases/coreboot-blobs-4.15.tar.xz
+```
+
+**coreboot-blobs-4.15.tar.xz** is needed for CPU microcode updates.
+
+Extract coreboot and blobs needed:
+
+```sh
+tar xvf coreboot-4.15.tar.xz
+tar xvf coreboot-blobs-4.15.tar.xz --strip-components=1 -C coreboot-4.15
+```
+
+# Setup and compile coreboot
+
+Enter coreboot folder:
+
+```sh
+cd coreboot-4.15
+```
+
+Build toolchain needed first (this will take a long time, be patient):
+
+```sh
+make crossgcc-i386 CPUS=4
+```
+
+coreboot settings menu:
+
+```sh
+make menuconfig
+```
+
+Set the following options:
+
+```plaintext
+NOTE: Leave default values as is and specifically set the following
+options:
+
+mainboard -|
+           |-Mainboard vendor (Lenovo)
+           |-Mainboard model (ThinkPad X200)
+           |-ROM chip size (8192 KB (8 MB))
+           |-(0x300000) Size of CBFS filesystem in ROM
+chipset ---|
+           |-Include CPU microcode in CBFS (Generate from Tree)
+Devices ---|
+           |-Graphics initialization (Use libgfxinit)
+           |-Display
+           |-    Framebuffer mode (Linear "high-resolution" framebuffer)
+Generic Dr.|
+           |- Select: PS/2 keyboard init   
+payload ---|
+           |-Add a payload (An ELF executable payload)
+           |-"(/path/to/grub/grub2.elf)" Payload path and filename
+
+If you don't want to include CPU microcode updates:
+
+```plaintext
+chipset ---|
+           |-Include CPU microcode in CBFS (Do not include microcode updates)
+```
+
+This will create a '**.config**' file containing all settings.
+
+Compile coreboot:
+
+```sh
+make -j4
+```
+
+This will create '**build/coreboot.rom**' image with the size of 8mb.
+
+# Add custom files to 'coreboot.rom' image
+
+Add '**grub.cfg**' and '**background.jpg**' to coreboot.rom. See
+'**Prerequisites**' above for the files needed.
+
+Make sure '**cbfstool**' is built:
+
+```sh
+cd coreboot-4.15/util/cbfstool
+make -j4
+```
+
+Add custom GRUB configuration file:
+
+```sh
+./cbfstool ../../build/coreboot.rom add -t raw -n etc/grub.cfg -f your/path/to/grub.cfg
+```
+
+Check so that '**etc/grub.cfg**' exists in coreboot.rom:
+
+```sh
+./cbfstool ../../build/coreboot.rom print
+```
+
+Add background image:
+
+```sh
+./cbfstool ../../build/coreboot.rom add -t raw -n background.jpg -f your/path/to/background.jpg
+```
+
+Check so that '**background.jpg**' exists in coreboot.rom:
+
+```sh
+./cbfstool ../../build/coreboot.rom print
+```
+
+#  Add Descriptor and GbE File
+
+Download libreboot utils:
+
+```sh
+wget https://mirrors.mit.edu/libreboot/stable/20160907/libreboot_r20160907_util.tar.xz
+```
+
+Extract the utils:
+
+```sh
+tar xvf libreboot_r20160907_util.tar.xz
+```
+
+Generate MAC address (MAC address is listed on the bottom of the X200 on
+a white label on the right side):
+
+```sh
+cd libreboot_r20160907_util/ich9deblob/x86_64
+./ich9gen --macaddress xx:xx:xx:xx:xx:xx
+```
+
+And lastly append it to coreboot.rom:
+
+```sh
+dd if=ich9fdgbe_8m.bin of=~/misc-src/coreboot-4.15/build/coreboot.rom bs=1 count=12k conv=notrunc
+```
+
+Done! Now it's time to flash the new '**coreboot.rom**' image!
+
+# Flash coreboot image
+
+See '**Connect programmer to flash chip**' for details on how
+to connect programmer.
+
+Flash coreboot using **Raspberry Pi** programmer:
+
+```sh
+sudo flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=32768 -w coreboot.rom -V
+```
+
+Flash coreboot using **ch341a** USB programmer:
+
+```sh
+sudo flashrom -p ch341a_spi -w coreboot.rom -V
+```
+
+# Change Wifi card
+
+Remove the following parts to access the Wifi card:
+
+```plaintext
+Battery
+Keyboard
+Palmrest
+```
+
+See '**Connect programmer to flash chip**' for details on
+where the Wifi card is located. 
+
+Now you can install a libre distro such as [Debian
+GNU/Linux](https://www.debian.org/).
+
+# Boot Debian GNU/Linux netinst iso from usb in GRUB2
+
+Download Debian GNU/Linux netinst from [here](https://www.debian.org/).
+
+Check name of USB device:
+
+```sh
+sudo fdisk -l
+```
+
+Create bootable USB drive:
+
+```sh
+sudo dd bs=4M if=/path/to/debian-img.iso of=/dev/YOUR_USB status=progress oflag=sync
+```
+
+Start the computer up and in the GRUB2 menu press '**c**' to enter
+command line and from there type the following:
+
+```sh
+set root='usb0'
+linux /install.amd/vmlinuz
+initrd /install.amd/initrd.gz
+boot
+```
+
+Install Debian GNU/Linux normally and put GRUB2 on master boot record at
+the end of installation process. After reboot default option in GRUB2
+menu on the flashchip will load GRUB2 on the AHCI HDD you installed on.
+
+# Download compiled coreboot image
+
+The resulting coreboot image from this tutorial can be downloaded here:
+
+[`lenovo-thinkpad-x200_coreboot-4-15-grub-master-with-cpu-microcode.rom`](/static/blog/files/x200/lenovo-thinkpad-x200_coreboot-4-15-grub-master-with-cpu-microcode.rom)
+
+Congratulations! We’re done.
+
+# Recommended reading
+
+[https://www.coreboot.org/](https://www.coreboot.org/)\
+[https://www.flashrom.org/](https://www.flashrom.org/)\
+[https://www.thinkwiki.org/wiki/Category:X200](https://www.thinkwiki.org/wiki/Category:X200)\
+[https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/43y6632_03.pdf](https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/43y6632_03.pdf)\
+[https://dejavu-fonts.github.io/](https://dejavu-fonts.github.io/)\
+[https://dejavu-fonts.github.io/License.html](https://dejavu-fonts.github.io/License.html)
+