From c08797334916315e66cd53abcb0ffb51bcd113d8 Mon Sep 17 00:00:00 2001
From: Lukas Timmermann <lukas@timmermann.space>
Date: Mon, 17 Nov 2025 17:30:38 +0100
Subject: [PATCH] u-boot-manta: Introduce u-boot package for
 device-samsung-manta

Signed-off-by: Lukas Timmermann <lukas@timmermann.space>
Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/7208>
---
 device/community/u-boot-manta/APKBUILD      |  53 +++++++++
 device/community/u-boot-manta/update-u-boot | 112 ++++++++++++++++++++
 2 files changed, 165 insertions(+)
 create mode 100644 device/community/u-boot-manta/APKBUILD
 create mode 100644 device/community/u-boot-manta/update-u-boot

diff --git a/device/community/u-boot-manta/APKBUILD b/device/community/u-boot-manta/APKBUILD
new file mode 100644
index 000000000..ffe2f314b
--- /dev/null
+++ b/device/community/u-boot-manta/APKBUILD
@@ -0,0 +1,53 @@
+# Maintainer: Lukas Timmermann <linux@timmermann.space>
+
+pkgname=u-boot-manta
+pkgver=2026.01
+pkgrel=0
+pkgdesc="U-Boot bootloader for the Samsung Manta (Google Nexus 10) Tablet"
+url="https://gitlab.com/LaT3St/u-boot"
+arch="armv7"
+license="GPL-2.0-or-later OFL-1.1 BSD-2-Clause BSD-3-Clause eCos-2.0 IBM-pibs
+	ISC LGPL-2.0-only LGPL-2.1-only X11"
+makedepends="$depends_dev
+	bc
+	bison
+	dtc
+	flex
+	openssl-dev
+	py3-setuptools
+	python3-dev
+	swig
+	gnutls-dev
+	android-tools
+	"
+options="!check"
+source="https://gitlab.com/LaT3St/u-boot/-/archive/lat3st/samsung-manta/u-boot-lat3st-samsung-manta.tar.gz
+		update-u-boot
+	"
+builddir="$srcdir/u-boot-lat3st-samsung-manta"
+
+build() {
+	LC_ALL=C date +'#define U_BOOT_DATE "%b %d %C%y"' > include/timestamp_autogenerated.h
+	LC_ALL=C date +'#define U_BOOT_TIME "%T"' >> include/timestamp_autogenerated.h
+
+	export BUILD_DIR="$builddir"/build
+
+	mkdir -p "$BUILD_DIR"
+	make O="$BUILD_DIR" HOSTCC=gcc ARCH=arm manta_defconfig
+	make O="$BUILD_DIR" HOSTCC=gcc ARCH=arm all
+	sha512sum -b "$BUILD_DIR/u-boot.bin" > "$BUILD_DIR/u-boot.bin.sha512"
+}
+
+package() {
+	install -D -m644 "build/u-boot.bin" \
+		"$pkgdir/usr/share/u-boot/samsung-manta/u-boot.bin"
+	install -D -m644 "build/u-boot.bin.sha512" \
+		"$pkgdir/usr/share/u-boot/samsung-manta/u-boot.bin.sha512"
+
+	install -D -m 755 "$srcdir"/update-u-boot "$pkgdir"/usr/sbin/update-u-boot
+}
+
+sha512sums="
+aa47486537fa9f8b16f50919ae2f16a2556f1ac07acc24943a9798b35236ecc7de77c8b48aa07179e07422eda1435ed701d4a1e65b8993edc1c97f809efe72a3  u-boot-lat3st-samsung-manta.tar.gz
+654c3fe5ed9eb078f97b990d2743dd875fb3d395bcbbb8a3082fd8e73bdf1842f8919f7b58a81c4446f00739e935d31cfabb59086d255c5d978e0f7a0bc3c3d8  update-u-boot
+"
diff --git a/device/community/u-boot-manta/update-u-boot b/device/community/u-boot-manta/update-u-boot
new file mode 100644
index 000000000..fc8d5d6c3
--- /dev/null
+++ b/device/community/u-boot-manta/update-u-boot
@@ -0,0 +1,112 @@
+#!/bin/sh
+
+partition=/dev/mmcblk0p3
+verbose=
+dryrun=
+imagedir=/usr/share/u-boot/
+skip_delay=
+
+die() {
+	echo "ERROR: $@"
+	exit 1
+}
+
+usage() {
+	cat <<EOF
+usage: $0 [-n,--dry-run] [-i,--imagedir <imagedir>] [-s|--skip-delay]
+
+options:
+
+ -p, --partition <partition> Specify partition to flash u-boot to
+						  (current default: ${partition}) 
+
+ -i,--imagedir <imagedir> Specify u-boot image directory
+                          (current default: ${imagedir:-none})
+
+ -n,--dry-run             Print commands but don't execute them
+
+ -s,--skip-delay          Skip delay and flash the image immediately 
+
+EOF
+}
+
+validate_checksum() {
+	file="$1"
+	file_sha512="$file.sha512"
+	file_size=$(stat -c%s $file)
+	partition="$2"
+	bs="$3"
+
+	checksum0=$(cat $file_sha512 | awk {'print $1'})
+	checksum1=$(dd if=$partition bs=1 count=$file_size status=none | sha512sum | awk {'print $1'})
+	if [ "$checksum0" != "$checksum1" ]; then
+		echo "File: $checksum0"
+		echo "Part: $checksum1"
+		die "Checksum failed"
+	fi
+	echo "Successful U-Boot image checksum verification on $partition :"
+	echo -e "\t$checksum1"
+}
+
+while [ $# -gt 0 ]; do
+	opt="$1"
+	shift
+	case "$opt" in
+	-p|--partition)
+		partition="$1"
+		shift
+		;;
+	-i|--imagedir)
+		imagedir="$1"
+		shift
+		;;
+	-n|--dry-run)
+		dryrun="echo"
+		;;
+	-s|--skip-delay)
+		skip_delay="yes"
+		;;
+        --)
+                break
+                ;;
+        -*)
+                usage
+                exit 1
+                ;;
+        esac
+done
+
+echo "/!\ WARNING:"
+echo "This upgrade may not work reliably, postmarketOS might not boot anymore!"
+echo
+read -p "Continue? (y/n) [n]: " -n 1 -r
+echo
+case "$REPLY" in
+	y|Y) ;;
+	*) exit 1 ;;
+esac
+
+if [ -z "$dryrun" ]; then
+	if [ -z "$skip_delay" ]; then
+		echo "Updating $board u-boot in $device in 3 seconds..."
+		sleep 3
+	else
+		echo "Updating $board u-boot in $device"
+	fi
+fi
+
+(
+set -e
+	[ -e "$imagedir/samsung-manta/" ] || die "manta images not installed, apk add u-boot-manta"
+	$dryrun echo "Generating android boot image..."
+	$dryrun dd if=/dev/zero of=/tmp/ramdisk iflag=fullblock bs=4b count=1
+	$dryrun gzip /tmp/ramdisk
+	$dryrun mkbootimg --kernel "$imagedir"samsung-manta/u-boot.bin --ramdisk /tmp/ramdisk.gz --base "0x40000000" --kernel_offset "0x00008000" --ramdisk_offset "0x01000000" --tags_offset "0x00000100" --second_offset "0x00f00000" --pagesize "2048" -o /tmp/aboot.img
+	$dryrun sha512sum /tmp/aboot.img > /tmp/aboot.img.sha512
+	$dryrun dd if=/tmp/aboot.img of=$partition bs=512 oflag=direct status=none
+	[ -z "$dryrun" ] && validate_checksum /tmp/aboot.img $partition 512
+	$dryrun rm -f /tmp/aboot.img /tmp/ramdisk.gz /tmp/ramdisk /tmp/aboot.img.sha512
+$dryrun sync
+) || die "U-Boot installation in $partition failed"
+
+[ -z "$dryrun" ] && echo "Completed successfully."