Dasharo internal flashing (Ubuntu 20.04)
Flashing Dasharo can be done from Linux using flashrom with the internal programmer. This document describes the process of building, installing and running flashrom on Ubuntu 20.04.
Ensure that the EC is running updated firmware. Follow the steps outlined in EC firmware update
Currently, the latest flashrom release lacks support for Tiger Lake-U internal flashing. Because of this, we need to build flashrom from source.
Install build dependencies:
# apt install git build-essential debhelper pkg-config libpci-dev libusb-1.0-0-dev libftdi1-dev meson
Obtain source code:
$ git clone https://review.coreboot.org/flashrom.git $ cd flashrom
$ make $ sudo make install
Reading flash contents
To read from the flash and save them to a file (
dump.rom), execute the
# flashrom -p internal -r dump.rom
To flash Dasharo to the laptop, execute the following command - replace [path]
with the path to the Dasharo image you want to flash, e.g.
If stock firmware or Dasharo version below v1.1.0 is currently installed:
# flashrom -p internal -w [path] --ifd -i bios
If version v1.1.0 or higher is currently installed, only the RW_SECTION_A partition of the flash needs to be updated. Flash it using the following command:
# flashrom -p internal -w [path] --fmap -i RW_SECTION_A
This command also preserves the bootsplash, UEFI settings and the boot order.