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{
fetchurl,
writeText,
libguestfs-with-appliance,
pkgsCross,
qemu,
runCommand,
cpio,
writeShellApplication,
sshPassword,
sshPort,
httpPort,
}:
let
updateName = "remarkable-production-memfault-image-3.14.1.9-rm2-public";
updateArchive = fetchurl {
url =
# TODO: this is not an official source. might be worth authenticating the updates
"https://storage.googleapis.com/remarkable-versions/${updateName}.swu";
hash = "sha256-8zlAGdv+w2KO7BruRQLQC9ivGSHtK82e36ASIeRF3zI=";
};
xochitlConfig = writeText "xochitl.conf" ''
[General]
DeveloperPassword=${sshPassword}
wifion=false
WebInterfaceEnabled=true
IdleSuspendDelay=0
SuspendPowerOffDelay=0
'';
usbMacAddr = "52:54:00:12:34:56";
ifnameUdevRule = writeText "70-persistent-net.rules" ''
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", \
ATTR{address}=="${usbMacAddr}", \
ATTR{type}=="1", KERNEL=="eth*", NAME="usb0"
'';
usbNetworkConfig = writeText "10-usb.network" ''
[Match]
Name=usb*
[Network]
DHCP=yes
'';
xochitlService = writeText "xochitl.service" ''
[Unit]
Description=reMarkable main application
After=home.mount network.target
[Service]
ExecStart=/usr/bin/xochitl --system
Restart=always
# required to make xochitl run
Environment=LD_PRELOAD=/usr/lib/libfakefbdev.so
[Install]
WantedBy=multi-user.target
'';
fakefbdev = pkgsCross.armv7l-hf-multiplatform.gcc11Stdenv.mkDerivation {
name = "fakefbdev";
src = ./fakefbdev;
installFlags = [ "DESTDIR=${placeholder "out"}" ];
};
kernel = pkgsCross.armv7l-hf-multiplatform.linux_5_4;
rootfsImage = runCommand "rm-rootfs.ext4" { nativeBuildInputs = [ cpio ]; } ''
cpio -i --file ${updateArchive}
gzip -dc ${updateName}.ext4.gz > $out
'';
diskImage =
runCommand "rm-disk.qcow2"
{
nativeBuildInputs = [
qemu
libguestfs-with-appliance
];
}
''
qemu-img create -f qcow2 $out 8G
guestfish --rw --blocksize=512 --add $out <<EOF
run
# not the original partition table of the RM2
part-init /dev/sda gpt
part-add /dev/sda p 2048 2099199
part-add /dev/sda p 2099200 10487807
part-add /dev/sda p 10487808 12584959
part-add /dev/sda p 12584960 16775167
mkfs vfat /dev/sda1
upload ${rootfsImage} /dev/sda2
resize2fs /dev/sda2
mkfs ext4 /dev/sda4
mount /dev/sda2 /
copy-in ${kernel}/lib/modules /lib
download /etc/fstab fstab
! sed -i 's/mmcblk2p/vda/' fstab
upload fstab /etc/fstab
upload ${ifnameUdevRule} /etc/udev/rules.d/70-persistent-net.rules
upload ${usbNetworkConfig} /etc/systemd/network/10-usb.network
upload ${xochitlService} /lib/systemd/system/xochitl.service
# delete any systemd units that hinder or delay startup
rm /lib/systemd/system/kdump.service
rm /lib/systemd/system/wacom_flash.service
rm /lib/systemd/system/memfaultd.service
rm /lib/systemd/system/swupdate.service
rm /lib/systemd/system/swupdate.socket
rm /etc/systemd/system/multi-user.target.wants/busybox-ifplugd@usb1.service
upload ${fakefbdev}/lib/libfakefbdev.so /usr/lib/libfakefbdev.so
chmod 0755 /usr/lib/libfakefbdev.so
mount /dev/sda4 /home
cp-a /etc/skel /home/root
mkdir-p /home/root/.local/share/remarkable/xochitl
mkdir-p /home/root/.config/remarkable
upload ${xochitlConfig} /home/root/.config/remarkable/xochitl.conf
EOF
'';
in
writeShellApplication {
name = "reMder-server";
runtimeInputs = [ qemu ];
text = ''
qemu-img create -b ${diskImage} -F qcow2 -f qcow2 ./reMder.qcow2
qemu-system-aarch64 \
-machine virt \
-enable-kvm \
-cpu host,aarch64=off \
-m 2048 \
-kernel ${kernel}/zImage \
-drive if=none,file=./reMder.qcow2,format=qcow2,id=hd \
-device virtio-blk-device,drive=hd \
-netdev user,hostfwd=tcp::${toString sshPort}-:22,hostfwd=tcp::${toString httpPort}-:80,id=net \
-device virtio-net-device,netdev=net,mac=${usbMacAddr} \
-append "console=ttyAMA0 rootfstype=ext4 root=/dev/vda2 rw rootwait init=/sbin/init" \
-serial mon:stdio \
-nographic
'';
}
|