ath79: split base-files into subtargets

While most of the target's contents are split into subtargets, the
base-files are maintained for the target as a whole.

However, OpenWrt already implements a mechanism that will use (and
even prefer) files in the subtargets' directories. This can be
exploited to make several scripts subtarget-specific and thus save
some space (especially helpful for the tiny devices).

The only script remaining in parent base-files is
/etc/hotplug.d/ieee80211/00-wifi-migration, everything else is
moved/split.

Note that this will increase overall code lines, but reduce code
per subtarget.

base-files ipk size reduction:
master (generic)   49135 B
split (generic)    48533 B (- 0.6 kiB)
split (tiny)       43337 B (- 5.7 kiB)
split (nand)       44423 B (- 4.6 kiB)

Tested on TL-WR1043ND v4 (generic) and TL-WR841N v12 (tiny).

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

2 files changed, 116 insertions, 0 deletions

diff --git a/target/linux/ath79/generic/base-files/lib/functions/k2t.sh b/target/linux/ath79/generic/base-files/lib/functions/k2t.sh
new file mode 100755
index 0000000000..1158df818b
--- /dev/null
+++ b/target/linux/ath79/generic/base-files/lib/functions/k2t.sh
@@ -0,0 +1,55 @@
+#!/bin/sh
+#
+# Copyright (C) 2018 Weijie Gao <hackpascal@gmail.com>
+#
+# Helper function to extract mac addresses from mtd part for Phicomm K2T
+#
+
+. /lib/functions.sh
+. /lib/functions/system.sh
+. /usr/share/libubox/jshn.sh
+
+k2t_config_load() {
+	local mtd_blk=$(find_mtd_part config)
+
+	if [ -z "$mtd_blk" ]; then
+		echo "k2t_config_load: no mtd part named config" >&2
+		exit 1
+	fi
+
+	local json_size=$(dd if=$mtd_blk bs=1 count=8 2>/dev/null)
+
+	json_size="0x$json_size"
+	json_size=$((json_size))
+
+	if [ "$?" -ne 0 ]; then
+		echo "k2t_config_load: invalid json data size" >&2
+		exit 2
+	fi
+
+	if [ "$json_size" -eq 0 ]; then
+		echo "k2t_config_load: empty json data" >&2
+		exit 3
+	fi
+
+	local json_data=$(dd if=$mtd_blk bs=1 skip=8 count=$json_size 2>/dev/null)
+
+	json_load "$json_data"
+}
+
+k2t_get_mac() {
+	local old_ns
+
+	json_set_namespace "k2t" old_ns
+
+	if k2t_config_load; then
+		json_select "this_dev_info"
+		json_get_var val "$1"
+		json_select ..
+	fi
+
+	json_set_namespace old_ns
+
+	echo $val
+}
+
diff --git a/target/linux/ath79/generic/base-files/lib/upgrade/platform.sh b/target/linux/ath79/generic/base-files/lib/upgrade/platform.sh
new file mode 100644
index 0000000000..83c4e78d25
--- /dev/null
+++ b/target/linux/ath79/generic/base-files/lib/upgrade/platform.sh
@@ -0,0 +1,61 @@
+#
+# Copyright (C) 2011 OpenWrt.org
+#
+
+PART_NAME=firmware
+REQUIRE_IMAGE_METADATA=1
+
+redboot_fis_do_upgrade() {
+	local append
+	local sysup_file="$1"
+	local kern_part="$2"
+	local magic=$(get_magic_word "$sysup_file")
+
+	if [ "$magic" = "4349" ]; then
+		local kern_length=0x$(dd if="$sysup_file" bs=2 skip=1 count=4 2>/dev/null)
+
+		[ -f "$UPGRADE_BACKUP" ] && append="-j $UPGRADE_BACKUP"
+		dd if="$sysup_file" bs=64k skip=1 2>/dev/null | \
+			mtd -r $append -F$kern_part:$kern_length:0x80060000,rootfs write - $kern_part:rootfs
+
+	elif [ "$magic" = "7379" ]; then
+		local board_dir=$(tar tf $sysup_file | grep -m 1 '^sysupgrade-.*/$')
+		local kern_length=$(tar xf $sysup_file ${board_dir}kernel -O | wc -c)
+
+		[ -f "$UPGRADE_BACKUP" ] && append="-j $UPGRADE_BACKUP"
+		tar xf $sysup_file ${board_dir}kernel ${board_dir}root -O | \
+			mtd -r $append -F$kern_part:$kern_length:0x80060000,rootfs write - $kern_part:rootfs
+
+	else
+		echo "Unknown image, aborting!"
+		return 1
+	fi
+}
+
+platform_check_image() {
+	return 0
+}
+
+platform_do_upgrade() {
+	local board=$(board_name)
+
+	case "$board" in
+	adtran,bsap1800-v2|\
+	adtran,bsap1840)
+		redboot_fis_do_upgrade "$1" vmlinux_2
+		;;
+	jjplus,ja76pf2)
+		echo "Sysupgrade disabled due bug FS#2428"
+		;;
+	ubnt,routerstation|\
+	ubnt,routerstation-pro)
+		echo "Sysupgrade disabled due bug FS#2428"
+		;;
+	zyxel,nbg6716)
+		nand_do_upgrade "$1"
+		;;
+	*)
+		default_do_upgrade "$1"
+		;;
+	esac
+}