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- # coreboot-x230
- pre-built coreboot images and documentation on how to flash them for the Thinkpad X230
-
- These images
- * include [SeaBIOS](https://seabios.org/SeaBIOS) as coreboot payload, for maximum compatibility.
- * are meant to be [flashed externally](#how-to-flash)
- * are compatible with Windows and Linux
-
- ## Latest build (config overview and version info)
- See our [releases](https://github.com/merge/coreboot-x230/releases)
-
- * Lenovo's proprietary VGA BIOS ROM is executed in "secure" mode
-
- ### coreboot
- * We simply take coreboot's current state in it's master branch at the time we build a release image.
- That's the preferred way to use coreboot. The git revision we use is always included in the release.
-
- ### Intel microcode
- * version [20180108](https://downloadcenter.intel.com/download/27431/Linux-Processor-Microcode-Data-File)
- * in 20180108, for the X230's CPU ID (306ax) the latest update is 2015-02-26
- * (not yet in coreboot upstream)
-
- ### SeaBIOS
- * version [1.11.0](https://seabios.org/Releases#SeaBIOS_1.11.0) from 2017-11-10
- * (in coreboot upstream)
-
- ## When do we do a release?
- Either when
- * There is a new SeaBIOS release,
- * There is a new Intel microcode release (included in coreboot AND affecting our CPU ID),
- * There is a coreboot issue that affects us (unlikely), or
- * We need to change the config
-
- ## TL;DR
- Download a released image, connect your hardware SPI flasher to the "upper"
- 4MB chip in your X230, and do
-
- flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=128 -w x230_coreboot_seabios_example_top.rom
-
-
- ## Flashing for the first time
-
- ### EC firmware
- Enter Lenovo's BIOS with __F1__ and check the embedded controller (EC) version to be
- __1.14__ and upgrade using [the latest bootable CD](https://support.lenovo.com/at/en/downloads/ds029188)
- if it isn't. The EC cannot be upgraded when coreboot is installed. (In case a newer
- version should ever be available (I doubt it), you could temporarily flash back your
- original Lenovo BIOS image)
-
- ### me_cleaner
- The Intel Management Engine resides on the 8MB chip. We don't need to touch it
- for coreboot-upgrades in the future, but while opening up the Thinkpad anyways,
- we can save it and run [ifdtool](https://github.com/coreboot/coreboot/tree/master/util/ifdtool)
- and [me_cleaner](https://github.com/corna/me_cleaner) on it:
-
-
- flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=128 -c "MX25L3206E/MX25L3208E" -r ifdmegbe.rom
- flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=128 -c "MX25L3206E/MX25L3208E" -r ifdmegbe2.rom
- diff ifdmegbe.rom ifdmegbe2.rom
- git clone https://github.com/corna/me_cleaner.git && cd me_cleaner
- ./me_cleaner.py -S -O ifdmegbe_meclean.rom ifdmegbe.rom
- ifdtool -u ifdmegbe_meclean.rom
- flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=128 -c "MX25L3206E/MX25L3208E" -w ifdmegbe_meclean.rom.new
-
- ### save the 4MB chip
- (internally, memory of the two chips is mapped together, the 8MB being the lower
- part, but we can essientially ignore that)
-
- For the first time, we have to save the original image, just like we did with
- the 8MB chip above:
-
-
- flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=128 -r top1.rom
- flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=128 -r top2.rom
- diff top1.rom top2.rom
-
- ## Flashing the coreboot / SeaBIOS image
- When __upgrading__ to a new version, for example when a new [SeaBIOS](https://seabios.org/Releases)
- version is available, only the "upper" 4MB chip has to be written.
-
- Download the latest release image we provide here and flash it:
-
-
- flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=128 -w x230_coreboot_seabios_example_top.rom
-
- ## How to flash
- We flash externally, using a "Pomona 5250 8-pin SOIC test clip". You'll find
- one easily. This is how the X230's SPI connection looks on both chips:
-
-
- Screen (furthest from you)
- __
- MOSI 5 --| |-- 4 GND
- CLK 6 --| |-- 3 N/C
- N/C 7 --| |-- 2 MISO
- VCC 8 --|__|-- 1 CS
-
- Edge (closest to you)
-
-
- ### Example: Raspberry Pi 3
- We run [Raspbian](https://www.raspberrypi.org/downloads/raspbian/)
- and have the following setup
- * [Serial connection](https://elinux.org/RPi_Serial_Connection) using a "USB to Serial" Adapter and picocom or minicom
- * in the SD Cards's `/boot/config.txt` file `enable_uart=1` and `dtparam=spi=on`
- * [For flashrom](https://www.flashrom.org/RaspberryPi) we put `spi_bcm2835` and `spidev` in /etc/modules
- * [Connect to a wifi](https://www.raspberrypi.org/documentation/configuration/wireless/wireless-cli.md) or to network over ethernet.
- * install `flashrom`
- * connect the Clip to the Raspberry Pi 3:
-
-
- Edge of pi (furthest from you)
- L CS
- E |
- F +---------------------------------------------------------------------------------+
- T | x x x x x x x x x x x x x x x x x x x x |
- | x x x x x x x x x x x x x x x x x x x x |
- E +----------------------------------^---^---^---^-------------------------------^--+
- D | | | | |
- G 3.3V MOSIMISO| GND
- E (VCC) CLK
- Body of Pi (closest to you)
-
-
- Now you should be able to copy the image over to your Rasperry Pi and run the
- mentioned `flashrom` commands.
-
- ### Example: DLN2
- If using a [Diolan DLN2](https://diolan.com/dln-2) as USB-SPI Adapter, we can
- stay on the host system to run flashrom. Make sure you have the Linux driver
- configured in, i.e. `CONFIG_SPI_DLN2=m`. Connect the Pomona Clip according to the
- [DLN2 Connectors](http://dlnware.com/sites/dlnware.com/files/downloads/dln-2-connectors-jumpers.pdf).
- MOSI, MISO, CS, CLK and VCC are Pin 1, 3, 5, 7, 9 on the J4 SPI Connector. Set JP3
- to 3,3V.
-
- TODO
-
- ## How we build
- Everything necessary to build coreboot is included in this project and building
- coreboot is not hard at all. Please refer to [coreboot's own documentation](https://www.coreboot.org/Build_HOWTO).
-
- When building, testing and doing a release here, we always try to upload our
- result to coreboot's [board status project](https://www.coreboot.org/Supported_Motherboards).
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