ath79: add support for Dongwon T&I DW02-412H

Dongwon T&I DW02-412H is a 2.4/5GHz band 11ac (WiFi-5) router, based on
Qualcomm Atheros QCA9557.

Specifications
--------------

- SoC: Qualcomm Atheros QCA9557-AT4A
- RAM: DDR2 128MB
- Flash: SPI NOR 2MB (Winbond W25Q16DVSSIG / ESMT F25L16PA(2S)) +
         NAND 64/128MB
- WiFi:
  - 2.4GHz: QCA9557 WMAC
  - 5GHz: QCA9882-BR4A
- Ethernet: 5x 10/100/1000Mbps
  - Switch: QCA8337N-AL3C
- USB: 1x USB 2.0
- UART:
  - JP2: 3.3V, TX, RX, GND (3.3V is the square pad) / 115200 8N1

Installation
--------------

1.  Connect a serial interface to UART header and
    interrupt the autostart of kernel.
2.  Transfer the factory image via TFTP and write it to the NAND flash.
3.  Update U-Boot environment variable.
    > tftpboot 0x81000000 <your image>-factory.img
    > nand erase 0x1000000
    > nand write 0x81000000 0x1000000 ${filesize}
    > setenv bootpart 2
    > saveenv

Revert to stock firmware
--------------

1.  Revert to stock U-Boot environment variable.
    > setenv bootpart 1
    > saveenv

MAC addresses as verified by OEM firmware
--------------

   WAN: *:XX (label)
   LAN: *:XX + 1
  2.4G: *:XX + 3
    5G: *:XX + 4

The label MAC address was found in art 0x0.

Credits
--------------

Credit goes to the @manatails who first developed how to port OpenWRT
to this device and had a significant impact on this patch.

And thanks to @adschm and @mans0n for guiding me to revise the code
in many ways.

Signed-off-by: Jihoon Han <rapid_renard@renard.ga>
Reviewed-by: Sungbo Eo <mans0n@gorani.run>
Tested-by: Sungbo Eo <mans0n@gorani.run>

3 files changed, 19 insertions, 0 deletions

diff --git a/target/linux/ath79/nand/base-files/etc/board.d/01_leds b/target/linux/ath79/nand/base-files/etc/board.d/01_leds
index fc74554763..f694d07e9c 100644
--- a/target/linux/ath79/nand/base-files/etc/board.d/01_leds
+++ b/target/linux/ath79/nand/base-files/etc/board.d/01_leds
@@ -6,6 +6,10 @@ board_config_update
 board=$(board_name)
 
 case "$board" in
+dongwon,dw02-412h-64m|\
+dongwon,dw02-412h-128m)
+	ucidef_set_led_switch "wan" "WAN" "green:wan" "switch0" "0x02"
+	;;
 glinet,gl-ar300m-nand|\
 glinet,gl-ar300m-nor)
 	ucidef_set_led_netdev "lan" "LAN" "green:lan" "eth0"
diff --git a/target/linux/ath79/nand/base-files/etc/board.d/02_network b/target/linux/ath79/nand/base-files/etc/board.d/02_network
index 7402fc067a..dbb9e68150 100644
--- a/target/linux/ath79/nand/base-files/etc/board.d/02_network
+++ b/target/linux/ath79/nand/base-files/etc/board.d/02_network
@@ -15,6 +15,11 @@ ath79_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0@eth0" "1:wan" "2:lan" "3:lan" "4:lan" "5:lan" "6@eth1"
 		;;
+	dongwon,dw02-412h-64m|\
+	dongwon,dw02-412h-128m)
+		ucidef_add_switch "switch0" \
+			"0@eth0" "2:lan:4" "3:lan:3" "4:lan:2" "5:lan:1" "1:wan"
+		;;
 	glinet,gl-ar750s-nor|\
 	glinet,gl-ar750s-nor-nand)
 		ucidef_add_switch "switch0" \
@@ -47,6 +52,11 @@ ath79_setup_macs()
 	local board="$1"
 
 	case "$board" in
+	dongwon,dw02-412h-64m|\
+	dongwon,dw02-412h-128m)
+		wan_mac=$(mtd_get_mac_binary art 0x0)
+		label_mac=$wan_mac
+		;;
 	netgear,wndr3700-v4|\
 	netgear,wndr4300|\
 	netgear,wndr4300sw|\
diff --git a/target/linux/ath79/nand/base-files/etc/hotplug.d/firmware/11-ath10k-caldata b/target/linux/ath79/nand/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
index f8cc8f1a2b..71dfb161e4 100644
--- a/target/linux/ath79/nand/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
+++ b/target/linux/ath79/nand/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
@@ -13,6 +13,11 @@ case "$FIRMWARE" in
 		caldata_extract "art" 0x5000 0x844
 		ath10k_patch_mac $(mtd_get_mac_binary art 0x12)
 		;;
+	dongwon,dw02-412h-64m|\
+	dongwon,dw02-412h-128m)
+		caldata_extract "art" 0x5000 0x844
+		ath10k_patch_mac $(macaddr_add $(mtd_get_mac_binary art 0x0) 4)
+		;;
 	glinet,gl-ar750s-nor|\
 	glinet,gl-ar750s-nor-nand)
 		caldata_extract "art" 0x5000 0x844