ath79: add support for Belkin F9J1108v2 (AC1750 DB Wi-Fi)

This device is the non-US build of the F9K1115 v2, with a different
firmware magic.

Specifications:

SoC: QCA9558
CPU: 720 MHz
Flash: 16 MiB NOR
RAM: 128 MiB
WiFi 2.4 GHz: QCA9558-AT4A 3x3 MIMO 802.11b/g/n
WiFi 5 GHz: QCA9880-2R4E 3x3 MIMO 802.11a/n/ac
Ethernet: 4x LAN and 1x WAN (all 1gbps)
USB: 1 x USB 2.0 (lower), 1 x USB 3.0 (upper)

MAC addresses based on OEM firmware:

Interface   Address   Location
---------   -------   --------
lan         *:5A      sometimes in 0x6
wan         *:5B      0x0
2.4Ghz      *:5A      0x1002
5Ghz        As per mini PCIe EEPROM

Flashing instructions:

The factory.bin can be flashed via the Belkin web UI or via the uboot
http upgrade page.
Once the factory.bin has been written, sysupgrade.bin will work as usual.

Signed-off-by: Damien Mascord <tusker@tusker.org>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
[wrap commit message/code, adjust label-mac-device, whitespace fixes,
merge block in 02_network]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

target/linux/ath79/image/generic.mk

@@ -50,6 +50,24 @@ define Build/cybertan-trx
 	-rm $@-empty.bin
 endef
 
+define Build/edimax-headers
+	$(eval edimax_magic=$(word 1,$(1)))
+	$(eval edimax_model=$(word 2,$(1)))
+
+	$(STAGING_DIR_HOST)/bin/edimax_fw_header -M $(edimax_magic) -m $(edimax_model)\
+		-v $(VERSION_DIST)$(firstword $(subst +, , $(firstword $(subst -, ,$(REVISION))))) \
+		-n "uImage" \
+		-i $(KDIR)/loader-$(DEVICE_NAME).uImage \
+		-o $@.uImage
+	$(STAGING_DIR_HOST)/bin/edimax_fw_header -M $(edimax_magic) -m $(edimax_model)\
+		-v $(VERSION_DIST)$(firstword $(subst +, , $(firstword $(subst -, ,$(REVISION))))) \
+		-n "rootfs" \
+		-i $@ \
+		-o $@.rootfs
+	cat $@.uImage $@.rootfs > $@
+	rm -rf $@.uImage $@.rootfs
+endef
+
 # This needs to make /tmp/_sys/sysupgrade.tgz an empty file prior to
 # sysupgrade, as otherwise it will implant the old configuration from
 # OEM firmware when writing rootfs from factory.bin
@@ -363,6 +381,27 @@ define Device/avm_fritzdvbc
 endef
 TARGET_DEVICES += avm_fritzdvbc
 
+define Device/belkin_f9j1108-v2
+  SOC := qca9558
+  DEVICE_VENDOR := Belkin
+  DEVICE_MODEL := F9J1108 v2 (AC1750 DB Wi-Fi)
+  IMAGE_SIZE := 14464k
+  DEVICE_PACKAGES += kmod-ath10k-ct ath10k-firmware-qca988x-ct kmod-usb2 \
+	kmod-usb3 kmod-usb-ledtrig-usbport
+  LOADER_TYPE := bin
+  LOADER_FLASH_OFFS := 0x50000
+  COMPILE := loader-$(1).bin loader-$(1).uImage
+  COMPILE/loader-$(1).bin := loader-okli-compile
+  COMPILE/loader-$(1).uImage := append-loader-okli $(1) | pad-to 64k | \
+	lzma | uImage lzma
+  KERNEL := kernel-bin | append-dtb | lzma | uImage lzma -M 0x4f4b4c49
+  IMAGES += factory.bin
+  IMAGE/factory.bin := append-kernel | pad-to $$$$(BLOCKSIZE) | \
+	append-rootfs | pad-rootfs | check-size | \
+	edimax-headers F9J1108v1 BR-6679BAC | pad-to $$$$(BLOCKSIZE)
+endef
+TARGET_DEVICES += belkin_f9j1108-v2
+
 define Device/buffalo_bhr-4grv
   $(Device/buffalo_common)
   SOC := ar7242