mediatek: add Linksys E8450 support

The Linksys E8450, also known as Belkin RT3200, is a dual-band
IEEE 802.11bgn/ac/ax router based on MediaTek MT7622BV and
MediaTek MT7915AN chips.

FCC: K7S-03571 and K7S-03572

Hardware highlights:
 - CPU: MediaTek MT7622BV (2x ARM Cortex-A53 @ 1350 MHz max.)
 - RAM: 512MB DDR3
 - Flash: 128MB SPI-NAND (2k+64)
 - Ethernet: MT7531BE switch with 5 1000Base-T ports
             CPU port connected with 2500Base-X
 - WiFi 2.4 GHz: 802.11bgn 4T4R built-in antennas
                 MT7622VB built-in
 - WiFi   5 GHz: 802.11ac/ax 4T4R built-in antennas
                 MT7915AN chip on-board via PCIe
                 MT7975AN front-end
 - Buttons: Reset and WPS
 - LEDS: 3 user controllable LEDs, 4 wired to switch
 - USB: USB2.0, single port
 - no Bluetooth (supported by SoC, not wired on board)
 - Serial: JST PH 2.0MM 6 Pin connector inside device
            ----_____________----
           [  GND RX - TX  -  -  ]
            ---------------------
 - JTAG:   unpopulated ARM JTAG 20-pin connector (works)

This commit adds support for the device in a way that is compatible
with the vendor firmware's bootloader and dual-boot flash layout, the
resulting image can directly be flashed using the vendor firmware.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

4 files changed, 47 insertions, 3 deletions

diff --git a/target/linux/mediatek/mt7622/base-files/etc/board.d/01_leds b/target/linux/mediatek/mt7622/base-files/etc/board.d/01_leds
new file mode 100755
index 0000000000..e74944a65f
--- /dev/null
+++ b/target/linux/mediatek/mt7622/base-files/etc/board.d/01_leds
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+. /lib/functions/leds.sh
+. /lib/functions/uci-defaults.sh
+
+board=$(board_name)
+
+board_config_update
+
+case $board in
+linksys,e8450)
+	ucidef_set_led_netdev "wan" "WAN" "inet:blue" "wan"
+	;;
+esac
+
+board_config_flush
+
+exit 0
diff --git a/target/linux/mediatek/mt7622/base-files/etc/board.d/02_network b/target/linux/mediatek/mt7622/base-files/etc/board.d/02_network
index 3a409c8ec9..3d2b9ffe49 100755
--- a/target/linux/mediatek/mt7622/base-files/etc/board.d/02_network
+++ b/target/linux/mediatek/mt7622/base-files/etc/board.d/02_network
@@ -10,9 +10,8 @@ mediatek_setup_interfaces()
 
 	case $board in
 	bananapi,bpi-r64-rootdisk|\
-	bananapi,bpi-r64)
-		ucidef_set_interfaces_lan_wan "lan0 lan1 lan2 lan3" wan
-		;;
+	bananapi,bpi-r64|\
+	linksys,e8450|\
 	mediatek,mt7622-rfb1)
 		ucidef_set_interfaces_lan_wan "lan1 lan2 lan3 lan4" wan
 		;;
@@ -31,7 +30,15 @@ mediatek_setup_macs()
 	local board="$1"
 
 	case $board in
+	linksys,e8450)
+		wan_mac=$(mtd_get_mac_ascii devinfo wan_mac_addr)
+		lan_mac=$(mtd_get_mac_ascii devinfo lan_mac_addr)
+		label_mac=$wan_mac
+		;;
 	esac
+	[ -n "$lan_mac" ] && ucidef_set_interface_macaddr "lan" $lan_mac
+	[ -n "$wan_mac" ] && ucidef_set_interface_macaddr "wan" $wan_mac
+	[ -n "$label_mac" ] && ucidef_set_label_macaddr $label_mac
 }
 
 board_config_update
diff --git a/target/linux/mediatek/mt7622/base-files/etc/init.d/bootcount b/target/linux/mediatek/mt7622/base-files/etc/init.d/bootcount
new file mode 100755
index 0000000000..bc4eeb6530
--- /dev/null
+++ b/target/linux/mediatek/mt7622/base-files/etc/init.d/bootcount
@@ -0,0 +1,11 @@
+#!/bin/sh /etc/rc.common
+
+START=99
+
+boot() {
+	case $(board_name) in
+	linksys,e8450)
+		mtd erase senv || true
+		;;
+	esac
+}
diff --git a/target/linux/mediatek/mt7622/base-files/lib/upgrade/platform.sh b/target/linux/mediatek/mt7622/base-files/lib/upgrade/platform.sh
index 8144476943..95ac8b5657 100755
--- a/target/linux/mediatek/mt7622/base-files/lib/upgrade/platform.sh
+++ b/target/linux/mediatek/mt7622/base-files/lib/upgrade/platform.sh
@@ -10,6 +10,14 @@ platform_do_upgrade() {
 	mediatek,mt7622,ubi)
 		nand_do_upgrade "$1"
 		;;
+	linksys,e8450)
+		if grep -q mtdparts=slave /proc/cmdline; then
+			PART_NAME=firmware2
+		else
+			PART_NAME=firmware1
+		fi
+		default_do_upgrade "$1"
+		;;
 	*)
 		default_do_upgrade "$1"
 		;;