Merge 3779bcebae into f7c70e5440

4 years ago · c7948541df
--- a/build.sh
+++ b/build.sh
@ -87,7 +87,7 @@ elif [ "$CLEAN_SLATE" ]; then
 fi

 ## Run Docker
 docker run --rm -it \
 docker run --rm -it --network host \
    --user "$(id -u):$(id -g)" \
    -v "$PWD/$MODEL/build:$DOCKER_COREBOOT_DIR" \
    -v "$PWD/$MODEL:$DOCKER_SCRIPT_DIR" \
--- a/x230t/.gitignore
+++ b/x230t/.gitignore
@ -0,0 +1,4 @@
 /output
 x230_coreboot_seabios_*rom*
 x230t_coreboot_seabios_*rom*
 /build
--- a/x230t/LICENSE
+++ b/x230t/LICENSE
@ -0,0 +1,674 @@
                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

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 notice like this when it starts in an interactive mode:

    <program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.

 The hypothetical commands `show w' and `show c' should show the appropriate
 parts of the General Public License.  Of course, your program's commands
 might be different; for a GUI interface, you would use an "about box".

  You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU GPL, see
 <http://www.gnu.org/licenses/>.

  The GNU General Public License does not permit incorporating your program
 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
 <http://www.gnu.org/philosophy/why-not-lgpl.html>.
--- a/x230t/NEWS
+++ b/x230t/NEWS
--- a/x230t/README.md
+++ b/x230t/README.md
@ -0,0 +1,272 @@
 # Skulls - [Thinkpad X230 Tablet](https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-x-series-tablet-laptops/thinkpad-x230-tablet)

 ![seabios_bootmenu](front.jpg)

 ## Latest release
 Get it from our [release page](https://github.com/merge/coreboot-x230/releases)
 * __coreboot__: We take coreboot's master branch at the time we build a release image.
 * __microcode update__: revision `0x21` from 2019-02-13
 * __SeaBIOS__: version [1.12.1](https://seabios.org/Releases) from 2019-02-04

 ### release images to choose from
 We release multiple different, but _very similar_ images you can choose from.
 They all should work on all versions of the X230/X230T. These are the
 differences; (xxxxxxxxxx stands for random characters in the filename):
 * `x230t_coreboot_seabios_xxxxxxxxxx_top.rom` includes the _proprietary_
 [VGA BIOS](https://en.wikipedia.org/wiki/Video_BIOS) from [Intel](https://www.intel.com/content/www/us/en/intelligent-systems/intel-embedded-graphics-drivers/faq-bios-firmware.html)
 which is non-free software. It is executed in "secure" mode.
 * `x230t_coreboot_seabios_free_xxxxxxxxxx_top.rom` includes the
 [VGA BIOS](https://en.wikipedia.org/wiki/Video_BIOS)
 [SeaVGABIOS](https://www.seabios.org/SeaVGABIOS) which is free software.
 While technically more interesting, visually this is currently not as
 beautiful:
  * The [bootspash image is not shown](https://github.com/merge/skulls/issues/59).
  * Early boot console messages (after your HDD's bootloader has started a kernel) might be [missing](https://github.com/merge/skulls/issues/46).


 ## table of contents
 * [TL;DR](#tldr)
 * [First-time installation](#first-time-installation)
 * [Updating](#updating)
 * [Moving to Heads](#moving-to-heads)
 * [Why does this work](#why-does-this-work)
 * [How to rebuild](#how-to-reproduce-the-release-images)

 ## TL;DR
 1. run `sudo ./x230t_skulls.sh` on your current X230 Linux system
 2. Power down, remove the battery. Remove the keyboard and palmrest. Connect
 a hardware flasher to an external PC (or a Raspberry Pi with a SPI 8-pin chip clip
 can directly be used), and run
 `sudo ./external_install_bottom.sh` on the lower chip
 and `sudo ./external_install_top.sh` on the top chip of the two.
 3. For updating later, run `./x230t_skulls.sh`. No need to disassemble.

 And always use the latest [released](https://github.com/merge/coreboot-x230/releases)
 package. This will be tested. The git master
 branch is _not_ meant to be stable. Use it for testing only.

 ## First-time installation
 #### before you begin
 Run Linux on your X230 Tablet, install `dmidecode` and run
 `sudo ./x230t_skulls.sh`. It simply prints system information and
 helps you to be up to date.

 Make sure you have the latest skulls-x230t package release by running
 `./x230t_skulls.sh -U`.

 #### original BIOS update / EC firmware (optional)
 If the script, `sudo ./x230t_skulls.sh` says "The installed original BIOS is very
 old.", it means that you have a BIOS version that may include an EC version
 older than 1.14.

 If that's the case, consider doing one original Lenovo upgrade process. This is not
 supported anymore, once you're running coreboot (You'd have to manually
 flash back your backup images first, see later chapters).

 This updates the BIOS _and_ Embedded Controller (EC) firmware. The EC
 is not updated anymore, when running coreboot. Since official BIOS release 2.77 and
 its EC version 1.15 Lenovo includes a digital signature check, which prevents
 further firmware patching.


 You have 2 options:

 * use [the latest original CD](https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-x-series-tablet-laptops/thinkpad-x230-tablet/downloads/DS029683) and burn it, or
 * use the same, only with a patched EC firmware that allows using any aftermarket-battery:
 (this is only possible up to EC Firmware 1.14)
 By default, only original Lenovo batteries are allowed.
 Thanks to [this](http://zmatt.net/unlocking-my-lenovo-laptop-part-3/)
 [project](https://github.com/eigenmatt/mec-tools) we can use Lenovo's bootable
 upgrade image, change it and create a bootable _USB_ image (even with EC updates
 that allows one to use 3rd party aftermarket batteries). For this, follow instructions
 at [github.com/hamishcoleman/thinkpad-ec](https://github.com/hamishcoleman/thinkpad-ec).

 #### preparation: required hardware
 * An 8 Pin SOIC Clip, for example from
 [Pomona electronics](https://www.pomonaelectronics.com/products/test-clips/soic-clip-8-pin)
 (for availability, check
 [aliexpress](https://de.aliexpress.com/item/POMONA-SOIC-CLIP-5250-8pin-eeprom-for-tacho-8pin-cable-for-pomana-soic-8pin/32814247676.html) or
 [elsewhere](https://geizhals.eu/?fs=pomona+test+clip+5250))
 or alternatively hooks like
 [E-Z-Hook XKM](https://e-z-hook.com/test-hooks/micro-hook/xkm/)
 * 6 [female](https://electronics.stackexchange.com/questions/37783/how-can-i-create-a-female-jumper-wire-connector)
 [jumper wires](https://en.wikipedia.org/wiki/Jump_wire) like
 [these](https://geizhals.eu/jumper-cable-female-female-20cm-a1471094.html)
 to connect the clip to a hardware flasher (if not included with the clip)
 * a hardware flasher
 [supported by flashrom](https://www.flashrom.org/Flashrom/0.9.9/Supported_Hardware#USB_Devices), see below for the examples we support

 #### open up the X230
 Remove the 7 screws of your X230 to remove the keyboard (by pushing it towards the
 screen before lifting) and the palmrest. You'll find the chips using the photo
 below. This is how the SPI connection looks like on both of the X230's chips:


 		Screen (furthest from you)
 ![			     ______
      MOSI  5 --|      |-- 4  GND
       CLK  6 --|      |-- 3  N/C
       N/C  7 --|      |-- 2  MISO
       VCC  8 --|______|-- 1  CS](soic8.png)

 		   Edge (closest to you)


 ... choose __one of the following__ supported flashing hardware examples:

 #### Hardware Example: Raspberry Pi 3
 A Raspberry Pi can directly be a flasher through it's I/O pins, see below.
 Use a test clip or hooks, see [required hardware](#preparation-required-hardware).

 On the RPi we run [Raspbian](https://www.raspberrypi.org/downloads/raspbian/)
 and have the following setup:
 * Connect to the console: Either
  * connect a screen and a keyboard, or
  * Use the [Serial connection](https://elinux.org/RPi_Serial_Connection) using a
 USB-to-serial cable (like [Adafruit 954](http://www.adafruit.com/products/954),
 [FTDI TTL-232R-RPI](http://www.ftdichip.com/Products/Cables/RPi.htm) or
 [others](https://geizhals.eu/usb-to-ttl-serial-adapter-cable-a1461312.html)) and
 picocom (`picocom -b 115200 /dev/ttyUSB0`) 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 ethernet to `sudo apt-get install flashrom`
 * connect the Clip to the Raspberry Pi 3 (there are
 [prettier images](https://github.com/splitbrain/rpibplusleaf) too):


 		   Edge of pi (furthest from you)
 		               (UART)
 		 L           GND TX  RX                           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)


 ![Raspberry Pi at work](rpi_clip.jpg)

 Now copy the Skulls release tarball over to the Rasperry Pi and
 [continue](#unpack-the-skulls-release-archive) on the Pi.

 #### Hardware Example: CH341A based
 The CH341A from [Winchiphead](http://www.wch.cn/), a USB interface chip,
 is used by some cheap memory programmers.
 The one we describe can be bought at
 [aliexpress](http://www.aliexpress.com/item/Free-Shipping-CH341A-24-25-Series-EEPROM-Flash-BIOS-DVD-USB-Programmer-DVD-programmer-router-Nine/32583059603.html),
 but it's available [elsewhere](https://geizhals.eu/?fs=ch341a) too.
 This means you need a different computer running a Linux based system here.
 Also, we don't use the included 3,3V power output (provides too little power),
 but a separate power supply. If you don't have any, consider getting a AMS1117
 based supply for a second USB port (like [this](https://de.aliexpress.com/item/1PCS-AMS1117-3-3V-Mini-USB-5V-3-3V-DC-Perfect-Power-Supply-Module/32785334595.html) or [this](https://www.ebay.com/sch/i.html?_nkw=ams1117+usb)).

 * Leave the P/S Jumper connected (programmer mode, 1a86:5512 USB device)
 * Connect 3,3V from your external supply to the Pomona clip's (or hook) VCC
 * Connect GND from your external supply to GND on your CH341A programmer
 * Connect your clip or hooks to the rest of the programmer's SPI pins
 * Connect the programmer (and power supply, if USB) to your PC's USB port

 ![ch341a programmer with extra USB power supply](ch341a.jpg)

 #### unpack the Skulls release archive


 	tar -xf skulls-x230-<version>.tar.xz
 	cd skulls-x230-<version>


 #### ifd unlock and me_cleaner: the 8MB chip

 Flashing the bottom chip (closer to you) is optional. It has the same pinout
 than the upper chip. This allows you to enable/disable in-system flashing
 (without disassembling the Thinkpad) and/or to neuter the
 [Intel Management Engine](https://en.wikipedia.org/wiki/Intel_Management_Engine)
 for [security reasons](https://en.wikipedia.org/wiki/Intel_Management_Engine#Security_vulnerabilities).


 	sudo ./external_install_bottom.sh -m -k <backup-file-to-create>


 That's it. Keep the backup safe. Here are the options (just so you know):

 * The `-m` option applies `me_cleaner -S -d` before flashing back, see
 [me_cleaner](https://github.com/corna/me_cleaner).
 * The `-l` option will (re-)lock your flash ROM, in case you want to force
 yourself (and others) to hardware-flashing, see [updating](#updating).

 #### Your BIOS choice: the 4MB chip
 Now it's time to make your choice! Choose one of the images included in our
 release and select it during running:


 	sudo ./external_install_top.sh -k <backup-file-to-create>


 This selects and flashes it and that's it.
 Keep the backup safe, assemble and
 turn on the X230. coreboot will do hardware init and start SeaBIOS.

 ## Updating
 If you have locked your flash (i.e. `./external_install_bottom -l`) you can
 flash externally using `external_install_top.sh` just like the
 first time, see above. Only the "upper" 4MB chip has to be written.

 It is recommended to do the the update directly on your X230 using Linux
 though. This is considered more safe for your hardware and is very convenient -
 just install the "flashrom" program and run  `./x230_skulls.sh`, see below.

 1. boot Linux with the `iomem=relaxed` boot parameter (for example in /etc/default/grub `GRUB_CMDLINE_LINUX_DEFAULT`)
 2. [download](https://github.com/merge/skulls/releases) the latest Skulls release tarball and unpack it or check for updates by running `./x230_skulls.sh -U`.
 3. run `sudo ./x230_skulls.sh` and choose the image to flash.

 Hint: In case your Linux distribution's GRUB bootloader doesn't use the full
 screen, put the line `GRUB_GFXMODE=1366x768x32` in your `/etc/default/grub` file
 (and run `update_grub`).

 ## Moving to Heads
 [Heads](http://osresearch.net/) is an alternative BIOS system with advanced
 security features. It's more complicated to use though. When having Skulls
 installed, installing Heads is as easy as updating Skulls. You can directly
 start using it:

 * [build Heads](https://github.com/osresearch/heads)
 * boot Linux with the `iomem=relaxed` boot parameter
 * copy Heads' 12M image file `build/x230/coreboot.rom` to Skulls' x230 directory
 * run `sudo ./x230_heads.sh`

 That's it. Heads is a completely different project. Please read the
 [documentation](http://osresearch.net/) for how to use it and report bugs
 [over there](https://github.com/osresearch/heads/issues)

 Switching back to Skulls is the same as [updating](#updating). Just run
 `./x230_skulls.sh`.

 ## Why does this work?
 On the X230, there are 2 physical "BIOS" chips. The "upper" 4MB
 one holds the actual bios we can generate using coreboot, and the "lower" 8MB
 one holds the rest that you can [modify yourself once](#first-time-installation),
 if you like, but strictly speaking, you
 [don't need to touch it at all](https://www.coreboot.org/Board:lenovo/x230#Building_Firmware).
 What's this "rest"?
 Mainly a tiny binary used by the Ethernet card and the Intel Management Engine.
 Read the [coreboot documentation](https://doc.coreboot.org/mainboard/lenovo/xx30_series.html)
 for more details.

 ## how to reproduce the release images
 * `git clone https://github.com/merge/skulls`
 * `cd skulls/x230`
 * `git checkout 0.1.5` for the release you want to build. In this example 0.1.5.
 * `./build.sh` and choose the configuration you want to build

 ### replace the splashscreen image
 In order to create your own splashscreen image, before building,
 overwrite the `splashscreen.jpg` with your own JPEG, using
 * "Progressive" turned off, and
 * "4:2:0 (chroma quartered)" Subsampling

--- a/x230t/bootsplash.jpg
+++ b/x230t/bootsplash.jpg
--- a/x230t/bootsplash.xcf
+++ b/x230t/bootsplash.xcf
--- a/x230t/build.sh
+++ b/x230t/build.sh
@ -0,0 +1,81 @@
 #!/bin/bash
 source "util/functions.sh"

 warn_not_root

 have_config=0

 usage()
 {
 	echo "Skulls for the X230 Tablet"
 	echo "  Run this script to rebuild a released image"
 	echo ""
 	echo "Usage: $0 [-c <config_file>]"
 	echo ""
 	echo " -c <config_file>        to use for flashrom"
 }

 args=$(getopt -o c:h -- "$@")
 if [ $? -ne 0 ] ; then
 	usage
 	exit 1
 fi

 eval set -- "$args"
 while [ $# -gt 0 ]
 do
 	case "$1" in
 	-c)
 		CONFIGFILE=$2
 		have_config=1
 		shift
 		;;
 	-h)
 		usage
 		exit 1
 		;;
 	--)
 		shift
 		break
 		;;
 	*)
 		echo "Invalid option: $1"
 		exit 1
 		;;
 	esac
 	shift
 done

 if [ ! "$have_config" -gt 0 ] ; then
 	configs_available=$(ls -1 | grep config || true)
 	if [ -z "${configs_available}" ] ; then
 		echo "No config file found. Please add -c <file>"
 		echo ""
 		usage
 		exit 1
 	fi

 	prompt="Please select a configuration to use for building or start with the -c option to use a different one:"
 	options=( $(find -maxdepth 1 -name "*config*" -print0 | xargs -0) )

 	PS3="$prompt "
 	select CONFIGFILE in "${options[@]}" "Quit" ; do
 		if (( REPLY == 1 + ${#options[@]} )) ; then
 			exit

 		elif (( REPLY > 0 && REPLY <= ${#options[@]} )) ; then
 			break

 		else
 			echo "Invalid option. Try another one."
 		fi
 	done
 fi

 rm -f defconfig-*
 CONFIGFILE_READY=$(echo $CONFIGFILE | cut -d'-' -f2-)
 cp $CONFIGFILE $CONFIGFILE_READY

 cd ..
 ./build.sh --clean-slate --commit $(ls -1 x230t/defconfig-* |  cut -d'-' -f2-) x230t
 rm -f x230t/defconfig-*
--- a/x230t/ch341a.jpg
+++ b/x230t/ch341a.jpg
--- a/x230t/compile.sh
+++ b/x230t/compile.sh
@ -0,0 +1,46 @@
 #!/bin/bash
 # SPDX-License-Identifier: GPL-3.0+
 # Copyright (C) 2018, Tom Hiller <thrilleratplay@gmail.com>

 # shellcheck disable=SC1091
 source /home/coreboot/common_scripts/variables.sh
 source /home/coreboot/common_scripts/download_coreboot.sh
 source /home/coreboot/common_scripts/config_and_make.sh

 ################################################################################
 ## MODEL VARIABLES
 ################################################################################
 MAINBOARD="lenovo"
 MODEL="x230t"

 ################################################################################

 ###############################################
 ##   download/git clone/git pull Coreboot    ##
 ###############################################
 downloadOrUpdateCoreboot

 ##############################
 ##   Copy config and make   ##
 ##############################
 configAndMake

 #####################
 ##   Post build    ##
 #####################
 if [ ! -f "$DOCKER_COREBOOT_DIR/build/coreboot.rom" ]; then
  echo "Uh oh. Things did not go according to plan."
  exit 1;
 else
  #split out top BIOS
  if [ ! -z "$COREBOOT_COMMIT" ]; then
    RELEASEFILE="${MODEL}_coreboot_seabios_$(echo ${COREBOOT_COMMIT} | cut -c 1-10)_top.rom"
  else
    RELEASEFILE="coreboot_$MAINBOARD-$MODEL-top.rom"
  fi
  dd if="$DOCKER_COREBOOT_DIR/build/coreboot.rom" of="$DOCKER_COREBOOT_DIR/$RELEASEFILE" bs=1M skip=8
  sha256sum "$DOCKER_COREBOOT_DIR/$RELEASEFILE" > "$DOCKER_COREBOOT_DIR/${RELEASEFILE}".sha256
  echo "==================== result: ======================"
  echo "$DOCKER_COREBOOT_DIR/$RELEASEFILE"
  echo "==================================================="
 fi
--- a/x230t/external_install_bottom.sh
+++ b/x230t/external_install_bottom.sh
@ -0,0 +1,265 @@
 #!/bin/bash
 # SPDX-License-Identifier: GPL-3.0+
 # Copyright (C) 2018, Martin Kepplinger <martink@posteo.de>
 RED='\033[0;31m'
 GREEN='\033[0;32m'
 NC='\033[0m'

 set -e

 cd "$(dirname "$0")"

 IFDTOOL=./util/ifdtool/ifdtool
 ME_CLEANER_PATH=./util/me_cleaner/me_cleaner.py
 have_chipname=0
 have_backupname=0
 me_clean=0
 lock=0
 have_flasher=0
 rpi_frequency=0

 usage()
 {
 	echo "Skulls for the X230 Tablet"
 	echo "  Run this script on an external computer with a flasher"
 	echo "  connected to the X230T's bottom chip (farther away from"
 	echo "  the display, closer to you)."
 	echo ""
 	echo "Usage: $0 [-m] [-k <backup_filename>] [-l] [-f <flasher>] [-b <spispeed>] [-c <chip>]"
 	echo ""
 	echo " -f <hardware_flasher>   supported flashers: rpi, ch341a"
 	echo " -c <chipname>           flashrom chip name to use"
 	echo " -m                      apply me_cleaner -S -d"
 	echo " -l                      lock the flash instead of unlocking it"
 	echo " -k <backup>             save the current image as"
 	echo " -b <spi frequency>      frequency of the RPi SPI bus in Hz. default: 128"
 }

 args=$(getopt -o f:mlc:k:hb: -- "$@")
 if [ $? -ne 0 ] ; then
 	usage
 	exit 1
 fi

 eval set -- "$args"
 while [ $# -gt 0 ]
 do
 	case "$1" in
 	-f)
 		FLASHER=$2
 		have_flasher=1
 		shift
 		;;
 	-m)
 		me_clean=1
 		;;
 	-l)
 		lock=1
 		;;
 	-c)
 		CHIPNAME=$2
 		have_chipname=1
 		shift
 		;;
 	-k)
 		BACKUPNAME=$2
 		have_backupname=1
 		shift
 		;;
 	-b)
 		rpi_frequency=$2
 		shift
 		;;
 	-h)
 		usage
 		exit 1
 		;;
 	--)
 		shift
 		break
 		;;
 	*)
 		echo "Invalid option: $1"
 		usage
 		exit 1
 		;;
 	esac
 	shift
 done

 command -v flashrom >/dev/null 2>&1 || { echo -e >&2 "${RED}Please install flashrom and run as root${NC}."; exit 1; }
 command -v make >/dev/null 2>&1 || { echo -e >&2 "${RED}Please install make and a C compiler${NC}."; exit 1; }
 command -v mktemp >/dev/null 2>&1 || { echo -e >&2 "${RED}Please install mktemp (coreutils)${NC}."; exit 1; }

 if [ ! "$have_flasher" -gt 0 ] ; then
 	echo "Skulls for the X230"
 	echo ""
 	echo "Please select the hardware you use:"
 	PS3='Please select the hardware flasher: '
 	options=("Raspberry Pi" "CH341A" "Exit")
 	select opt in "${options[@]}"
 	do
 		case $opt in
 			"Raspberry Pi")
 				FLASHER="rpi"
 				break
 				;;
 			"CH341A")
 				FLASHER="ch341a"
 				break
 				;;
 			"Exit")
 				exit 0
 				;;
 			*) echo invalid option;;
 		esac
 	done
 fi

 if [ ! "${rpi_frequency}" -gt 0 ] ; then
 	rpi_frequency=512
 fi

 programmer=""
 if [ "${FLASHER}" = "rpi" ] ; then
 	echo "Ok. Run this on a Rasperry Pi."
 	programmer="linux_spi:dev=/dev/spidev0.0,spispeed=${rpi_frequency}"
 elif [ "${FLASHER}" = "ch341a" ] ; then
 	echo "Ok. Connect a CH341A programmer"
 	programmer="ch341a_spi"
 else
 	echo "invalid flashrom programmer"
 	usage
 	exit 1
 fi

 TEMP_DIR=$(mktemp -d)
 if [ ! -d "$TEMP_DIR" ]; then
 	echo -e "${RED}Error:${NC} Could not create temp dir"
 	rm -rf "${TEMP_DIR}"
 	exit 1
 fi

 if [ ! "$have_chipname" -gt 0 ] ; then
 	echo "trying to detect the chip..."
 	flashrom -p ${programmer} &> "${TEMP_DIR}"/chips || true
 	flashrom_error=""
 	flashrom_error=$(cat "${TEMP_DIR}"/chips | grep -i error || true)
 	if [ ! -z "${flashrom_error}" ] ; then
 		usage
 		echo "-------------- flashrom error: ---------------"
 		cat "${TEMP_DIR}"/chips
 		rm -rf "${TEMP_DIR}"
 		exit 1
 	fi

 	CHIPNAME=""
 	chip_found=0
 	if [ ! "$chip_found" -gt 0 ] ; then
 		CHIPNAME=$(cat "${TEMP_DIR}"/chips | grep Found | grep "MX25L6406E/MX25L6408E" | grep -oP '"\K[^"\047]+(?=["\047])' || true)
 		if [ ! -z "${CHIPNAME}" ] ; then
 			chip_found=1
 		fi
 	fi

 	if [ ! "$chip_found" -gt 0 ] ; then
 		CHIPNAME=$(cat "${TEMP_DIR}"/chips | grep Found | grep "EN25QH64" | grep -o '".*"' | grep -oP '"\K[^"\047]+(?=["\047])' || true)
 		if [ ! -z "${CHIPNAME}" ] ; then
 			chip_found=1
 		fi
 	fi

 	if [ ! "$chip_found" -gt 0 ] ; then
 		CHIPNAME=$(cat "${TEMP_DIR}"/chips | grep Found | grep "W25Q64.V" | grep -o '".*"' | grep -oP '"\K[^"\047]+(?=["\047])' || true)
 		if [ ! -z "${CHIPNAME}" ] ; then
 			chip_found=1
 		fi
 	fi

 	if [ ! "$chip_found" -gt 0 ] ; then
 		echo "chip not detected."
 		flashrom -p ${programmer} || true
 		rm -rf "${TEMP_DIR}"
 		echo "chip not detected. Please find it manually and rerun with the -c parameter."
 		exit 1
 	else
 		echo -e "Detected ${GREEN}${CHIPNAME}${NC}."
 	fi
 fi

 make -C util/ifdtool
 if [ ! -e ${IFDTOOL} ] ; then
 	echo "ifdtool not found at ${IFDTOOL}"
 	exit 1
 fi

 if [ ! "$me_clean" -gt 0 ] ; then
 	echo -e "Intel ME will ${RED}not${NC} be cleaned. Use -m if it should be."
 else
 	echo -e "Intel ME will be ${GREEN}cleaned${NC}."
 fi

 if [ ! "$lock" -gt 0 ] ; then
 	echo -e "The flash ROM will be ${GREEN}unlocked${NC}."
 else
 	echo -e "The flash ROM will be ${RED}locked${NC}."
 fi

 if [ "$me_clean" -gt 0 ] ; then
 	if [ ! -e ${ME_CLEANER_PATH} ] ; then
 		echo "me_cleaner not found at ${ME_CLEANER_PATH}"
 		rm -rf "${TEMP_DIR}"
 		exit 1
 	fi
 fi

 echo "Start reading 2 times. Please be patient..."
 flashrom -p ${programmer} -c ${CHIPNAME} -r "${TEMP_DIR}"/test1.rom
 flashrom -p ${programmer} -c ${CHIPNAME} -r "${TEMP_DIR}"/test2.rom
 cmp --silent "${TEMP_DIR}"/test1.rom "${TEMP_DIR}"/test2.rom
 if [ "$have_backupname" -gt 0 ] ; then
 	cp "${TEMP_DIR}"/test1.rom "${BACKUPNAME}"
 	sha256sum "${TEMP_DIR}"/test1.rom > "${BACKUPNAME}".sha256
 	echo "current image saved as ${BACKUPNAME}"
 fi

 reference_size=8388608
 TEMP_SIZE=$(wc -c <"$TEMP_DIR/test1.rom")
 if [ ! "$reference_size" -eq "$TEMP_SIZE" ] ; then
 	echo -e "${RED}Error:${NC} didn't read 8M. You might be at the wrong chip."
 	rm -rf "${TEMP_DIR}"
 	exit 1
 fi

 echo -e "${GREEN}connection ok${NC}"

 echo "start unlocking ..."
 if [ "$me_clean" -gt 0 ] ; then
 	${ME_CLEANER_PATH} -d -S -O "${TEMP_DIR}"/work.rom "${TEMP_DIR}"/test1.rom
 else
 	cp "${TEMP_DIR}"/test1.rom "${TEMP_DIR}"/work.rom
 fi

 if [ ! "$lock" -gt 0 ] ; then
 	${IFDTOOL} -u "${TEMP_DIR}"/work.rom
 else
 	${IFDTOOL} -l "${TEMP_DIR}"/work.rom
 fi

 if [ ! -e "${TEMP_DIR}"/work.rom.new ] ; then
 	echo -e "${RED}Error:${NC} ifdtool failed. ${TEMP_DIR}/work.rom.new not found."
 	rm -rf "${TEMP_DIR}"
 	exit 1
 fi
 if [ "$me_clean" -gt 0 ] ; then
 	echo -e "${GREEN}ifdtool and me_cleaner ok${NC}"
 else
 	echo -e "${GREEN}ifdtool ok${NC}"
 fi
 make clean -C util/ifdtool

 echo "start writing..."

 flashrom -p ${programmer} -c "${CHIPNAME}" -w "${TEMP_DIR}"/work.rom.new
 rm -rf "${TEMP_DIR}"
 echo -e "${GREEN}DONE${NC}"
--- a/x230t/external_install_top.sh
+++ b/x230t/external_install_top.sh
@ -0,0 +1,219 @@
 #!/bin/bash
 # SPDX-License-Identifier: GPL-3.0+
 # Copyright (C) 2018, Martin Kepplinger <martink@posteo.de>
 RED='\033[0;31m'
 GREEN='\033[0;32m'
 NC='\033[0m'

 set -e

 have_input_image=0
 have_chipname=0
 have_backupname=0
 have_flasher=0
 rpi_frequency=0

 usage()
 {
 	echo "Skulls for the X230 Tablet"
 	echo "  Run this script on an external computer with a flasher"
 	echo "  connected to the X230's top chip (closer to the display"
 	echo "  and farther from you)"
 	echo ""
 	echo "Usage: $0 [-i <image.rom>] [-c <chipname>] [-k <backup_filename>] [-f <flasher>] [-b <spispeed>]"
 	echo ""
 	echo " -f <hardware_flasher>   supported flashers: rpi, ch341a"
 	echo " -i <image>              path to image to flash"
 	echo " -c <chipname>           to use for flashrom"
 	echo " -k <backup>             save the current image as"
 	echo " -b <spi frequency>      frequency of the RPi SPI bus in Hz. default: 128"
 }

 args=$(getopt -o f:i:c:k:hb: -- "$@")
 if [ $? -ne 0 ] ; then
 	usage
 	exit 1
 fi

 eval set -- "$args"
 while [ $# -gt 0 ]
 do
 	case "$1" in
 	-f)
 		FLASHER=$2
 		have_flasher=1
 		shift
 		;;
 	-i)
 		INPUT_IMAGE_PATH=$2
 		have_input_image=1
 		shift
 		;;
 	-c)
 		CHIPNAME=$2
 		have_chipname=1
 		shift
 		;;
 	-k)
 		BACKUPNAME=$2
 		have_backupname=1
 		shift
 		;;
 	-b)
 		rpi_frequency=$2
 		shift
 		;;
 	-h)
 		usage
 		exit 1
 		;;
 	--)
 		shift
 		break
 		;;
 	*)
 		echo "Invalid option: $1"
 		exit 1
 		;;
 	esac
 	shift
 done

 command -v flashrom >/dev/null 2>&1 || { echo -e >&2 "${RED}Please install flashrom and run as root${NC}."; exit 1; }
 command -v mktemp >/dev/null 2>&1 || { echo -e >&2 "${RED}Please install mktemp (coreutils)${NC}."; exit 1; }

 if [ ! "$have_input_image" -gt 0 ] ; then
 	image_available=$(ls -1 | grep x230t_coreboot_seabios || true)
 	if [ -z "${image_available}" ] ; then
 		echo "No image file found. Please add -i <file>"
 		echo ""
 		usage
 		exit 1
 	fi

 	prompt="Please select a file to flash or start with the -i option to use a different one:"
 	options=( $(find -maxdepth 1 -name "*rom" -print0 | xargs -0) )

 	PS3="$prompt "
 	select INPUT_IMAGE_PATH in "${options[@]}" "Quit" ; do
 		if (( REPLY == 1 + ${#options[@]} )) ; then
 			exit

 		elif (( REPLY > 0 && REPLY <= ${#options[@]} )) ; then
 			break

 		else
 			echo "Invalid option. Try another one."
 		fi
 	done
 fi

 if [ ! "$have_flasher" -gt 0 ] ; then
 	echo "Please select the hardware you use:"
 	PS3='Please select the hardware flasher: '
 	options=("Raspberry Pi" "CH341A" "Quit")
 	select opt in "${options[@]}"
 	do
 		case $opt in
 			"Raspberry Pi")
 				FLASHER="rpi"
 				break
 				;;
 			"CH341A")
 				FLASHER="ch341a"
 				break
 				;;
 			"Quit")
 				exit 0
 				;;
 			*) echo invalid option;;
 		esac
 	done
 fi

 if [ ! "${rpi_frequency}" -gt 0 ] ; then
 	rpi_frequency=512
 fi

 programmer=""
 if [ "${FLASHER}" = "rpi" ] ; then
 	programmer="linux_spi:dev=/dev/spidev0.0,spispeed=${rpi_frequency}"
 elif [ "${FLASHER}" = "ch341a" ] ; then
 	programmer="ch341a_spi"
 else
 	echo "invalid flashrom programmer"
 	usage
 	exit 1
 fi

 TEMP_DIR=$(mktemp -d)
 if [ ! -d "$TEMP_DIR" ]; then
 	echo "${RED}Error:${NC} Could not create temp dir"
 	exit 1
 fi

 if [ ! "$have_chipname" -gt 0 ] ; then
 	echo "trying to detect the chip..."
 	flashrom -p ${programmer} &> "${TEMP_DIR}"/chips || true
 	flashrom_error=""
 	flashrom_error=$(cat "${TEMP_DIR}"/chips | grep -i error || true)
 	if [ ! -z "${flashrom_error}" ] ; then
 		cat "${TEMP_DIR}"/chips
 		rm -rf "${TEMP_DIR}"
 		exit 1
 	fi

 	CHIPNAME=""
 	chip_found=0
 	if [ ! "$chip_found" -gt 0 ] ; then
 		CHIPNAME=$(cat "${TEMP_DIR}"/chips | grep Found | grep MX25L3206E | grep -oP '"\K[^"\047]+(?=["\047])' || true)
 		if [ ! -z "${CHIPNAME}" ] ; then
 			chip_found=1
 		fi
 	fi

 	if [ ! "$chip_found" -gt 0 ] ; then
 		CHIPNAME=$(cat "${TEMP_DIR}"/chips | grep Found | grep EN25QH32 | grep -oP '"\K[^"\047]+(?=["\047])' || true)
 		if [ ! -z "${CHIPNAME}" ] ; then
 			chip_found=1
 		fi
 	fi

 	if [ ! "$chip_found" -gt 0 ] ; then
 		echo "chip not detected."
 		flashrom -p ${programmer} || true
 		rm -rf "${TEMP_DIR}"
 		echo "Please find it manually in the list above and rerun with the -c parameter."
 		exit 1
 	else
 		echo -e "Detected ${GREEN}${CHIPNAME}${NC}."
 	fi
 fi

 INPUT_IMAGE_NAME=$(basename "${INPUT_IMAGE_PATH}")
 INPUT_IMAGE_SIZE=$(wc -c < "$INPUT_IMAGE_PATH")
 reference_filesize=4194304
 if [ ! "$INPUT_IMAGE_SIZE" -eq "$reference_filesize" ] ; then
 	echo -e "${RED}Error:${NC} input file must be 4MB of size"
 	exit 1
 fi

 echo "verifying SPI connection by reading 2 times. please wait."
 flashrom -p ${programmer} -c ${CHIPNAME} -r ${TEMP_DIR}/test1.rom
 flashrom -p ${programmer} -c ${CHIPNAME} -r ${TEMP_DIR}/test2.rom
 cmp --silent "${TEMP_DIR}"/test1.rom "${TEMP_DIR}"/test2.rom
 if [ "$have_backupname" -gt 0 ] ; then
 	cp "${TEMP_DIR}"/test1.rom "${BACKUPNAME}"
 	sha256sum "${TEMP_DIR}"/test1.rom > "${BACKUPNAME}".sha256
 	echo "current image saved as ${BACKUPNAME}"
 fi
 TEMP_SIZE=$(wc -c < "$TEMP_DIR/test1.rom")
 if [ ! "$INPUT_IMAGE_SIZE" -eq "$TEMP_SIZE" ] ; then
 	echo -e "${RED}Error:${NC} read image (${TEMP_SIZE}) has different size that new image $INPUT_IMAGE_NAME (${INPUT_IMAGE_SIZE})"
 	exit 1
 fi
 rm -rf "${TEMP_DIR}"

 echo -e "${GREEN}connection ok${NC}. flashing ${INPUT_IMAGE_NAME}"
 flashrom -p ${programmer} -c "${CHIPNAME}" -w "${INPUT_IMAGE_PATH}"
 echo -e "${GREEN}DONE${NC}"
--- a/x230t/free-defconfig-4bd6927388
+++ b/x230t/free-defconfig-4bd6927388
@ -0,0 +1,17 @@
 CONFIG_USE_OPTION_TABLE=y
 CONFIG_USE_BLOBS=y
 CONFIG_BOOTSPLASH_IMAGE=y
 CONFIG_VENDOR_LENOVO=y
 CONFIG_NO_POST=y
 CONFIG_ONBOARD_VGA_IS_PRIMARY=y
 CONFIG_VGA_BIOS=y
 CONFIG_CBFS_SIZE=0x400000
 CONFIG_BOARD_LENOVO_X230T=y
 CONFIG_DRIVERS_PS2_KEYBOARD=y
 CONFIG_PCIEXP_L1_SUB_STATE=y
 CONFIG_PCIEXP_CLK_PM=y
 # CONFIG_H8_BEEP_ON_DEATH is not set
 CONFIG_MAINBOARD_USE_LIBGFXINIT=y
 CONFIG_DEFAULT_CONSOLE_LOGLEVEL_8=y
 CONFIG_COREINFO_SECONDARY_PAYLOAD=y
 CONFIG_NVRAMCUI_SECONDARY_PAYLOAD=y
--- a/x230t/front.jpg
+++ b/x230t/front.jpg
--- a/x230t/nonfree-defconfig-4bd6927388
+++ b/x230t/nonfree-defconfig-4bd6927388
@ -0,0 +1,22 @@
 CONFIG_USE_OPTION_TABLE=y
 CONFIG_USE_BLOBS=y
 CONFIG_BOOTSPLASH_IMAGE=y
 CONFIG_VENDOR_LENOVO=y
 CONFIG_NO_POST=y
 CONFIG_ONBOARD_VGA_IS_PRIMARY=y
 CONFIG_VGA_BIOS=y
 CONFIG_CBFS_SIZE=0x400000
 CONFIG_BOARD_LENOVO_X230T=y
 CONFIG_DRIVERS_PS2_KEYBOARD=y
 CONFIG_PCIEXP_L1_SUB_STATE=y
 # CONFIG_S3_VGA_ROM_RUN is not set
 CONFIG_PCIEXP_CLK_PM=y
 # CONFIG_H8_BEEP_ON_DEATH is not set
 CONFIG_VGA_ROM_RUN=y
 CONFIG_PCI_OPTION_ROM_RUN_YABEL=y
 CONFIG_FRAMEBUFFER_SET_VESA_MODE=y
 CONFIG_VBE_LINEAR_FRAMEBUFFER=y
 CONFIG_BOOTSPLASH=y
 CONFIG_DEFAULT_CONSOLE_LOGLEVEL_8=y
 CONFIG_COREINFO_SECONDARY_PAYLOAD=y
 CONFIG_NVRAMCUI_SECONDARY_PAYLOAD=y
--- a/x230t/pci8086,0166.rom
+++ b/x230t/pci8086,0166.rom
--- a/x230t/release.sh
+++ b/x230t/release.sh
@ -0,0 +1,150 @@
 #!/bin/bash
 # SPDX-License-Identifier: GPL-3.0+
 # Copyright (C) 2018, Martin Kepplinger <martink@posteo.de>
 #
 # Script to build release-archives with. This requires a checkout from git.
 # WARNING: This script is very dangerous! It may delete any untracked files.
 set -e
 have_version=0
 have_image=0
 have_image_2=0

 usage()
 {
        echo "Usage: $0 -v version -i release_image -f second_release_image"
 }

 args=$(getopt -o v:i:f: -- "$@")
 if [ $? -ne 0 ] ; then
        usage
        exit 1
 fi
 eval set -- "$args"
 while [ $# -gt 0 ]
 do
        case "$1" in
 	-i)
 		RELEASE_IMAGE=$2
 		have_image=1
 		shift
 		;;
 	-f)
 		RELEASE_IMAGE_2=$2
 		have_image_2=1
 		shift
 		;;
        -v)
                version=$2
                have_version=1
                shift
                ;;
        --)
                shift
                break
                ;;
        *)
                echo "Invalid option: $1"
                usage
                exit 1
                ;;
        esac
        shift
 done

 if [ ! "$have_image" -gt 0 ] ; then
 	echo "we currently need 2 release images"
 	usage
 	exit 1
 fi
 if [ ! "$have_image_2" -gt 0 ] ; then
 	echo "we currently need 2 release images"
 	usage
 	exit 1
 fi

 # Do we have a desired version number?
 if [ "$have_version" -gt 0 ] ; then
       echo "trying to build version $version"
 else
       echo "please specify a version"
       usage
       exit 1
 fi

 # Version number sanity check
 if grep "${version}" NEWS
 then
       echo "configurations seems ok"
 else
       echo "please check the NEWS file"
       exit 1
 fi

 # Check that we are on master
 branch=$(git rev-parse --abbrev-ref HEAD)
 echo "we are on branch $branch"

 if [ ! "${branch}" = "master" ] ; then
 	echo "you don't seem to be on the master branch"
 	exit 1
 fi

 if git diff-index --quiet HEAD --; then
 	# no changes
 	echo "there are no uncommitted changes (version bump)"
 	exit 1
 fi
 echo "======================================================"
 echo "    are you fine with the following version bump?"
 echo "======================================================"
 git diff
 echo "======================================================"
 read -r -p "           Press enter to continue"
 echo "======================================================"

 filesize=$(wc -c <"${RELEASE_IMAGE}")
 reference_filesize=4194304
 if [ ! "$filesize" -eq "$reference_filesize" ] ; then
 	echo "filesize of release image is wrong"
 	exit 1
 fi
 filesize=$(wc -c <"${RELEASE_IMAGE_2}")
 reference_filesize=4194304
 if [ ! "$filesize" -eq "$reference_filesize" ] ; then
 	echo "filesize of release image is wrong"
 	exit 1
 fi

 RELEASE_DIR="skulls-x230t-${version}"
 rm -rf "$RELEASE_DIR"
 mkdir -p "$RELEASE_DIR"

 # copy-in the ROMs
 cp "${RELEASE_IMAGE}" "$RELEASE_DIR"
 cp "${RELEASE_IMAGE_2}" "$RELEASE_DIR"

 RELEASE_IMAGE_FILE=$(basename "${RELEASE_IMAGE}")
 sha256sum ${RELEASE_DIR}/${RELEASE_IMAGE_FILE} > "${RELEASE_DIR}/${RELEASE_IMAGE_FILE}.sha256"
 RELEASE_IMAGE_FILE_2=$(basename "${RELEASE_IMAGE_2}")
 sha256sum ${RELEASE_DIR}/${RELEASE_IMAGE_FILE_2} > "${RELEASE_DIR}/${RELEASE_IMAGE_FILE_2}.sha256"

 # copy in device independent stuff
 cp ../SOURCE.md "$RELEASE_DIR"
 cp -a ../util "$RELEASE_DIR"

 # copy in x230t stuff
 cp -a README.md NEWS LICENSE* \
 	x230t_skulls.sh \
 	external_install_bottom.sh external_install_top.sh \
 	"$RELEASE_DIR"

 tar -cJf "$RELEASE_DIR".tar.xz "$RELEASE_DIR"

 rm -rf "$RELEASE_DIR"

 git commit -a -m "update to ${version}"
 git tag -s "${version}" -m "skulls-x230t ${version}"

 sha256sum "$RELEASE_DIR".tar.xz > "$RELEASE_DIR".tar.xz.sha256
 sha512sum "$RELEASE_DIR".tar.xz > "$RELEASE_DIR".tar.xz.sha512
 gpg -b -a "$RELEASE_DIR".tar.xz
--- a/x230t/rpi_clip.jpg
+++ b/x230t/rpi_clip.jpg
--- a/x230t/soic8.png
+++ b/x230t/soic8.png
--- a/x230t/util
+++ b/x230t/util
@ -0,0 +1 @@
 ../util
--- a/x230t/x230t_skulls.sh
+++ b/x230t/x230t_skulls.sh
@ -0,0 +1,224 @@
 #!/bin/bash
 # SPDX-License-Identifier: GPL-3.0+
 # Copyright (C) 2019, Martin Kepplinger <martink@posteo.de>

 set -e

 cd "$(dirname "$0")"

 source "util/functions.sh"

 have_input_image=0
 request_update=0
 verbose=0

 usage()
 {
 	echo "Skulls for the X230 Tablet"
 	echo "  Run this script on the X230 Tablet directly."
 	echo ""
 	echo "  This flashes the BIOS with the given image."
 	echo "  Make sure you booted Linux with iomem=relaxed"
 	echo ""
 	echo "Usage: $0 [-i <4mb_top_image>.rom] [-U] [-h]"
 	echo "Options:"
 	echo "  -i	path to the image to flash"
 	echo "  -U	update: check for a new Skulls package online"
 	echo "  -v	verbose output. prints more information"
 	echo "  -h	print this help text"
 }

 args=$(getopt -o i:hUv -- "$@")
 if [ $? -ne 0 ] ; then
 	usage
 	exit 1
 fi

 eval set -- "$args"
 while [ $# -gt 0 ]
 do
 	case "$1" in
 	-i)
 		INPUT_IMAGE_PATH=$2
 		have_input_image=1
 		shift
 		;;
 	-h)
 		usage
 		exit 1
 		;;
 	-U)
 		request_update=1
 		;;
 	-v)
 		verbose=1
 		;;
 	--)
 		shift
 		break
 		;;
 	*)
 		echo "Invalid option: $1"
 		exit 1
 		;;
 	esac
 	shift
 done

 if [ "$request_update" -gt 0 ] ; then
 	warn_not_root

 	command -v curl >/dev/null 2>&1 || { echo -e >&2 "${RED}Please install curl.${NC}"; exit 1; }

 	CURRENT_VERSION=$(head -2 NEWS | egrep -o "([0-9]{1,}\.)+[0-9]{1,}")

 	UPSTREAM_FILE=$(curl -s https://api.github.com/repos/merge/skulls/releases/latest | grep browser_download_url | cut -d'"' -f4 | cut -d'/' -f9 | head -n 1)

 	UPSTREAM_VERSION=$(curl -s https://api.github.com/repos/merge/skulls/releases/latest | grep browser_download_url | cut -d'"' -f4 | cut -d'/' -f9 | head -n 1 | egrep -o "([0-9]{1,}\.)+[0-9]{1,}")

 	UPSTREAM_X230T=$(echo ${UPSTREAM_FILE} | grep x230t)
 	if [[ -z "$UPSTREAM_X230T" ]] ; then
 		echo "The latest release didn't include the X230 Tablet"
 		exit 0
 	fi

 	if [[ $verbose -gt 0 ]] ; then
 		echo "This is v$CURRENT_VERSION and latest is v$UPSTREAM_VERSION"
 	fi

 	if [[ "$CURRENT_VERSION" = "$UPSTREAM_VERSION" ]] ; then
 		echo -e "${GREEN}You are using the latest version of Skulls for the X230 Tablet${NC}"
 		exit 0
 	elif [[ "$CURRENT_VERSION" < "$UPSTREAM_VERSION" ]] ; then
 		echo -e "${RED}You have ${CURRENT_VERSION} but there is version ${UPSTREAM_VERSION} available for the X230 Tablet. Please update.${NC}"
 		read -r -p "Download it to the parent directory now? [y/N] " response
 		case "$response" in
 			[yY][eE][sS]|[yY])
 				UPSTREAM_URL=$(curl -s https://api.github.com/repos/merge/skulls/releases/latest | grep browser_download_url | cut -d'"' -f4 | head -n 1)
 				UPSTREAM_URL_SHA256=$(curl -s https://api.github.com/repos/merge/skulls/releases/latest | grep browser_download_url | cut -d'"' -f4 | head -n 3 | tail -n 1)
 				cd ..
 				curl -LO ${UPSTREAM_URL}
 				curl -LO ${UPSTREAM_URL_SHA256}
 				sha256sum -c ${UPSTREAM_FILE}.sha256
 				mkdir skulls-x230t-${UPSTREAM_VERSION}
 				tar -xf ${UPSTREAM_FILE} -C skulls-x230t-${UPSTREAM_VERSION}/
 				echo "Version ${UPSTREAM_VERSION} extracted to ../skulls-x230t-${UPSTREAM_VERSION}/"
 				echo "Please continue in the new directory."
 				;;
 			*)
 				exit 0
 			;;
 		esac
 	else
 		echo "You seem to use a development version. Please use release package skulls-x230t ${UPSTREAM_VERSION} for flashing."
 	fi

 	exit 0
 fi

 force_x230_and_root

 BIOS_VENDOR=$(${DMIDECODE} -t bios | grep Vendor | cut -d':' -f2)
 if [[ $BIOS_VENDOR != *"coreboot"* ]] ; then
 	BIOS_VERSION=$(${DMIDECODE} -s bios-version | grep -o '[1-2].[0-7][0-9]')
 	bios_major=$(echo "$BIOS_VERSION" | cut -d. -f1)
 	bios_minor=$(echo "$BIOS_VERSION" | cut -d. -f2)

 	if [ "${bios_minor}" -ge "61" ] ; then
 		echo "Ready to use external_install_bottom.sh and external_install_top.sh"
 		echo "Please run both scripts from a different computer with a"
 		echo "hardware SPI flasher."
 	else
 		echo -e "The installed original BIOS is very old."
 		echo -e "${RED}Please upgrade${NC} from lenovo.com before installing coreboot."
 	fi
 	exit 0
 fi

 if [[ "$verbose" -gt 0 ]] ; then
 	if [ -d "/sys/class/power_supply/BAT0" ] ; then
 		bat_last_full=$(cat /sys/class/power_supply/BAT0/charge_full)
 		bat_design_cap=$(cat /sys/class/power_supply/BAT0/charge_full_design)
 		bat_health=$(echo "scale=2 ; $bat_last_full/$bat_design_cap" | bc | sed 's/^\./0./')
 		echo "INFO: Battery hardware health is $bat_health%"
 	fi
 fi

 if [ ! "$have_input_image" -gt 0 ] ; then
 	image_available=$(ls -1 | grep x230t_coreboot_seabios || true)
 	if [ -z "${image_available}" ] ; then
 		echo "No image file found. Please add -i <file>"
 		echo ""
 		usage
 		exit 1
 	fi

 	prompt="file not specified. Please select a file to flash. Please read the README for details about the differences:"
 	options=( $(find -maxdepth 1 -name "x230t_coreboot_seabios*rom" -print0 | xargs -0) )

 	PS3="$prompt "
 	select INPUT_IMAGE_PATH in "${options[@]}" "Quit" ; do
 		if (( REPLY == 1 + ${#options[@]} )) ; then
 			exit

 		elif (( REPLY > 0 && REPLY <= ${#options[@]} )) ; then
 			break

 		else
 			echo "Invalid option. Try another one."
 		fi
 	done
 fi


 OUTPUT_PATH=output
 INPUT_IMAGE_NAME=$(basename "${INPUT_IMAGE_PATH}")
 OUTPUT_IMAGE_NAME=${INPUT_IMAGE_NAME%%.*}_prepared_12mb.rom
 OUTPUT_IMAGE_PATH=${OUTPUT_PATH}/${OUTPUT_IMAGE_NAME}

 echo -e "input: ${INPUT_IMAGE_NAME}"
 echo -e "output: ${OUTPUT_IMAGE_PATH}"

 input_filesize=$(wc -c <"$INPUT_IMAGE_PATH")
 reference_filesize=4194304
 if [ ! "$input_filesize" -eq "$reference_filesize" ] ; then
 	echo "Error: input file must be 4MB of size"
 	exit 1
 fi

 rm -rf ${OUTPUT_PATH}
 mkdir ${OUTPUT_PATH}

 dd if=/dev/zero of="${OUTPUT_IMAGE_PATH}" bs=4M count=2 status=none
 dd if="${INPUT_IMAGE_PATH}" oflag=append conv=notrunc of="${OUTPUT_IMAGE_PATH}" bs=4M status=none

 LAYOUT_FILENAME="x230-layout.txt"

 echo "0x00000000:0x00000fff ifd" > ${OUTPUT_PATH}/${LAYOUT_FILENAME}
 echo "0x00001000:0x00002fff gbe" >> ${OUTPUT_PATH}/${LAYOUT_FILENAME}
 echo "0x00003000:0x004fffff me" >> ${OUTPUT_PATH}/${LAYOUT_FILENAME}
 echo "0x00500000:0x007fffff unused" >> ${OUTPUT_PATH}/${LAYOUT_FILENAME}
 echo "0x00800000:0x00bfffff bios" >> ${OUTPUT_PATH}/${LAYOUT_FILENAME}

 echo -e "${YELLOW}WARNING${NC}: Make sure not to power off your computer or interrupt this process in any way!"
 echo -e "         Interrupting this process may result in irreparable damage to your computer!"
 check_battery
 while true; do
 	read -r -p "Flash the BIOS now? y/N: " yn
 	case $yn in
 		[Yy]* ) cd ${OUTPUT_PATH} && ${FLASHROM} --force --noverify-all -p internal --layout ${LAYOUT_FILENAME} --image bios -w "${OUTPUT_IMAGE_NAME}"; break;;
 		[Nn]* ) exit;;
 		* ) exit;;
 	esac
 done

 rm -rf ${OUTPUT_PATH}

 while true; do
 	read -r -p "Power off now? (please do!) Y/n: " yn
 	case $yn in
 		[Yy]* ) poweroff ;;
 		[Nn]* ) exit;;
 		* ) poweroff ;;
 	esac
 done