From b4468ca56876026ed72fb3791fb2331614e41a2c Mon Sep 17 00:00:00 2001
From: Zoltan HERPAI <wigyori@uid0.hu>
Date: Thu, 31 Aug 2023 23:35:27 +0200
Subject: [PATCH] sunxi: t113: add eMMC image generation support

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>
---
 target/linux/sunxi/image/Makefile             | 22 +++++++++++++-
 target/linux/sunxi/image/cortexa7.mk          |  4 +++
 .../linux/sunxi/image/gen_sunxi_emmc_img.sh   | 30 +++++++++++++++++++
 .../sunxi/image/mmc.bootscript.ttyS5-emmc.txt |  8 +++++
 4 files changed, 63 insertions(+), 1 deletion(-)
 create mode 100755 target/linux/sunxi/image/gen_sunxi_emmc_img.sh
 create mode 100644 target/linux/sunxi/image/mmc.bootscript.ttyS5-emmc.txt

diff --git a/target/linux/sunxi/image/Makefile b/target/linux/sunxi/image/Makefile
index 738585accc..35ccc2ba6e 100644
--- a/target/linux/sunxi/image/Makefile
+++ b/target/linux/sunxi/image/Makefile
@@ -12,6 +12,11 @@ FAT32_BLOCKS=$(shell echo $$(($(CONFIG_SUNXI_SD_BOOT_PARTSIZE)*1024*1024/$(FAT32
 DEVICE_VARS := SUNXI_DTS SUNXI_DTS_DIR
 KERNEL_LOADADDR:=0x40008000
 
+define Build/boot-scr-emmc
+	rm -f $@-boot.scr
+	mkimage -A arm -O linux -T script -C none -a 0 -e 0 -d mmc.bootscript.ttyS5-emmc.txt $(STAGING_DIR_IMAGE)/$(DEVICE_NAME)-emmcboot.scr
+endef
+
 define Build/sunxi-sdcard
 	rm -f $@.boot
 	mkfs.fat $@.boot -C $(FAT32_BLOCKS)
@@ -28,7 +33,22 @@ define Build/sunxi-sdcard
 	rm -f $@.boot
 endef
 
-# why \x00\x00\x00\x00 for zImage-initramfs
+define Build/sunxi-emmc
+	rm -f $@.boot-emmc
+	mkfs.fat $@.boot-emmc -C $(FAT32_BLOCKS)
+
+	mcopy -i $@.boot-emmc $(STAGING_DIR_IMAGE)/$(DEVICE_NAME)-emmcboot.scr ::boot.scr
+	mcopy -i $@.boot-emmc $(DTS_DIR)/$(SUNXI_DTS).dtb ::dtb
+	mcopy -i $@.boot-emmc $(IMAGE_KERNEL) ::uImage
+
+	./gen_sunxi_emmc_img.sh $@ \
+		$@.boot-emmc \
+		$(IMAGE_ROOTFS) \
+		$(CONFIG_SUNXI_SD_BOOT_PARTSIZE) \
+		$(CONFIG_TARGET_ROOTFS_PARTSIZE)
+	rm -f $@.boot
+endef
+
 define Device/Default
   PROFILES := Default
   KERNEL_NAME := zImage
diff --git a/target/linux/sunxi/image/cortexa7.mk b/target/linux/sunxi/image/cortexa7.mk
index 9536e9a6e4..377e95b8c1 100644
--- a/target/linux/sunxi/image/cortexa7.mk
+++ b/target/linux/sunxi/image/cortexa7.mk
@@ -263,7 +263,9 @@ define Device/myir_myd-yt113x
   DEVICE_MODEL := MYD-YT113X
   DEVICE_PACKAGES := kmod-rtc-sunxi kmod-eeprom-at24 kmod-gpio-pca953x kmod-rtc-rx8025
   SOC := sun8i-t113s
+  IMAGES += emmc.img.gz
   IMAGE/sdcard.img.gz := sunxi-sdcard | append-metadata | gzip
+  IMAGE/emmc.img.gz := boot-scr-emmc | sunxi-emmc | append-metadata | gzip
 endef
 TARGET_DEVICES += myir_myd-yt113x
 
@@ -280,6 +282,8 @@ define Device/rongpin_rp-t113
   DEVICE_MODEL := RP-T113
   DEVICE_PACKAGES:=kmod-rtc-sunxi
   SOC := sun8i-t113s
+  IMAGES += emmc.img.gz
   IMAGE/sdcard.img.gz := sunxi-sdcard | append-metadata | gzip
+  IMAGE/emmc.img.gz := boot-scr-emmc | sunxi-emmc | append-metadata | gzip
 endef
 TARGET_DEVICES += rongpin_rp-t113
diff --git a/target/linux/sunxi/image/gen_sunxi_emmc_img.sh b/target/linux/sunxi/image/gen_sunxi_emmc_img.sh
new file mode 100755
index 0000000000..710dccd3af
--- /dev/null
+++ b/target/linux/sunxi/image/gen_sunxi_emmc_img.sh
@@ -0,0 +1,30 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Copyright (C) 2023 OpenWrt.org
+
+set -ex
+[ $# -eq 5 ] || {
+    echo "SYNTAX: $0 <file> <bootfs> <rootfs image> <bootfs size> <rootfs size>"
+    exit 1
+}
+
+OUTPUT="$1"
+BOOTFS="$2"
+ROOTFS="$3"
+BOOTFSSIZE="$4"
+ROOTFSSIZE="$5"
+
+head=4
+sect=63
+
+set $(ptgen -o $OUTPUT -h $head -s $sect -l 1024 -t c -p ${BOOTFSSIZE}M -t 83 -p ${ROOTFSSIZE}M)
+
+BOOTOFFSET="$(($1 / 512))"
+BOOTSIZE="$(($2 / 512))"
+ROOTFSOFFSET="$(($3 / 512))"
+ROOTFSSIZE="$(($4 / 512))"
+
+dd bs=512 if="$BOOTFS" of="$OUTPUT" seek="$BOOTOFFSET" conv=notrunc
+dd bs=512 if="$ROOTFS" of="$OUTPUT" seek="$ROOTFSOFFSET" conv=notrunc
+
diff --git a/target/linux/sunxi/image/mmc.bootscript.ttyS5-emmc.txt b/target/linux/sunxi/image/mmc.bootscript.ttyS5-emmc.txt
new file mode 100644
index 0000000000..353429bd09
--- /dev/null
+++ b/target/linux/sunxi/image/mmc.bootscript.ttyS5-emmc.txt
@@ -0,0 +1,8 @@
+setenv fdt_high ffffffff
+setenv mmc_rootpart 2
+part uuid mmc ${mmc_bootdev}:${mmc_rootpart} uuid
+setenv loadkernel fatload mmc \$mmc_bootdev \$kernel_addr_r uImage
+setenv loaddtb fatload mmc \$mmc_bootdev \$fdt_addr_r dtb
+setenv bootargs console=ttyS5,115200 earlyprintk root=PARTUUID=${uuid} rootwait
+setenv uenvcmd run loadkernel \&\& run loaddtb \&\& bootm \$kernel_addr_r - \$fdt_addr_r
+run uenvcmd
-- 
2.30.2