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diff --git a/posts/2022-01-13-16:24-setup-raspberry-pi-for-flashing-with-flashrom-tutorial.md b/posts/2022-01-13-16:24-setup-raspberry-pi-for-flashing-with-flashrom-tutorial.md new file mode 100644 index 0000000..10dc6fb --- /dev/null +++ b/posts/2022-01-13-16:24-setup-raspberry-pi-for-flashing-with-flashrom-tutorial.md @@ -0,0 +1,160 @@ +title: Setup Raspberry Pi for flashing with flashrom Tutorial +author: Andreas +date: 2022-01-13 16:24 +tags: Raspberry Pi, flashrom +--- + +In this tutorial, we will go through the steps to setup a Raspberry Pi for flashing with [flashrom](https://www.flashrom.org/). + +# Prerequisites + + + +Things you need: + +- Raspberry Pi +- Official 5.1V 2.5A Power Supply for Raspberry Pi. +- 16 GB (or more) class 10 MicroSD card for Raspberry Pi OS. +- HDMI cable +- Keyboard and Mouse + +This tutorial assumes you're using a GNU/Linux distro for the commands +outside of the Raspberry Pi and are familiar with how to use a terminal. + +I'm using a **Raspberry Pi 3 Model B** for this tutorial but any model +supported by Raspberry Pi OS will work fine. + +# Install and setup Raspberry Pi OS + +Download Raspberry Pi OS (with Desktop is recommended) from +[here](https://www.raspberrypi.com/software/operating-systems/) + +Unzip Raspberry Pi OS image: + +```sh +unzip IMAGE_NAME.zip +``` + +Insert the MicroSD card in a reader and check name of MicroSD card: + +```sh +sudo fdisk -l +``` + +Flash the unpacked Raspberry Pi OS image to the MicroSD card: + +```sh +sudo dd if=IMAGE_NAME.img of=/dev/YOURSDCARD bs=2M status=progress oflag=sync +``` + +Connect the peripherals (keyboard, mouse, HDMI, power cable), insert the +MicroSD card and boot the Raspberry Pi and make sure it works. + +Make sure all software is updated: + +```sh +sudo apt-get update +sudo apt-get dist-upgrade +sudo reboot +``` + +Check the IP address of your Raspberry Pi: + +```sh +ip addr +``` + +Write down the IP address (if using WiFi see '**inet**' under +'**wlan0**'). It should look something like **192.168.1.11**. You'll +need this IP address later to be able to connect using SSH from another +computer. + +Next you need to change some things in the config: + +```sh +sudo raspi-config +``` + +In this menu, select '**3. Interface Options**' and enable the +following options: + +```plaintext +SSH +SPI +I2C +``` + +Reboot the Raspberry Pi once this is done. + +Try connecting to the Raspberry Pi from another computer using SSH: + +```sh +ssh pi@192.168.1.11 +``` + +Change '**192.168.1.11**' to the IP address you wrote down in earlier +step. When it asks for a password, enter the password for the user +'**pi**'. + +From here on you can disconnect all peripherals and do the rest using +SSH. + +# Compile flashrom + +Clone flashrom git repository: + +```sh +git clone https://review.coreboot.org/flashrom.git +``` + +Compile flashrom: + +```sh +cd flashrom +sudo make install CONFIG_ENABLE_LIBUSB0_PROGRAMMERS=no CONFIG_ENABLE_LIBUSB1_PROGRAMMERS=no CONFIG_ENABLE_LIBPCI_PROGRAMMERS=no +sudo cp /usr/local/sbin/flashrom /usr/local/bin/ +``` + +# Raspberry Pi GPIO pinout + +**Raspberry Pi 3 Model B** GPIO pinout below. **Raspberry Pi 4** seems +to have the same layout and other models too probably. See GPIO pinout +diagram for your specific Raspberry Pi to be sure. + +Note: In flashing tutorials **CS = GPIO08(CE0)** (/dev/spidev0.0) + + + +# Example usage + +Read from connected chip: + +```sh +sudo flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=32768 -r factory_bios_01.rom -V +``` + +Read from specified chip: + +```sh +sudo flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=32768 -r factory-bios-top-1.bin -c "MX25L3206E/MX25L3208E" -V +``` + +Write to connected chip: + +```sh +sudo flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=32768 -w coreboot.rom -V +``` + +Write to specified chip: + +```sh +sudo flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=32768 -w coreboot.rom -c "MX25L3206E/MX25L3208E" -V +``` + +Congratulations! We're done. Now you can start flashing [coreboot](https://www.coreboot.org/) rom's. + +# Recommended reading + +[https://www.raspberrypi.com/](https://www.raspberrypi.com/)\ +[https://www.coreboot.org/](https://www.coreboot.org/)\ +[https://www.flashrom.org/](https://www.flashrom.org/) |