The TRENDnet TEW-827DRU is an ipq806x wireless router.

ipq8064 SoC with 2x ARMv7-ish Krait 300 CPUs at 1.4Ghz
512MB RAM, 256MB SLC NAND flash (64MB default UBI img size)
1x qca8337-al3c 1000BASE-T ethernet switch, 1-WAN, 4-LAN
2x qca9980 802.11 radios
2x USB3 type A

Product page: 
https://www.trendnet.com/products/wifi/AC2600-MU-MIMO-AC-routers/TEW-827DRU

Development thread: https://forum.openwrt.org/viewtopic.php?id=65956

The tew827dru factory image format supports installation from both the OEM web 
interface and a u-boot "recovery loader" HTTP page, which is accessible by 
booting the device with the reset button held down for four seconds. This 
factory image must be packaged in a FIT file with specific content and a Cameo 
signature/hwid appended to the file. The FIT image itself contains a u-boot 
hush shell script which installs a UBI image containing the kernel, 
sqaushfs-rootfs, and ubifs-overlay. Supporting this factory image required the 
addition of a new ITS formatter tool (its-maker.sh), a u-boot shell script 
(tew827dru-flash.scr), and a tiny "Fail Safe" bootconfig binary blob 
(tew827dru-bootconfig.bin).

Signed-off-by: jmomo <jm...@jmomo.net>
---
 include/image-commands.mk                          | 45 ++++++++++++++++++++++
 package/boot/uboot-envtools/files/ipq              |  3 ++
 .../linux/ipq806x/base-files/etc/board.d/01_leds   |  6 +++
 .../ipq806x/base-files/etc/board.d/02_network      |  4 ++
 target/linux/ipq806x/base-files/etc/diag.sh        |  3 ++
 .../etc/hotplug.d/firmware/11-ath10k-caldata       |  8 ++++
 .../etc/hotplug.d/ieee80211/10_fix_wifi_mac        |  3 ++
 target/linux/ipq806x/base-files/lib/ipq806x.sh     |  3 ++
 .../base-files/lib/preinit/06_set_iface_mac        | 24 ++++++++++++
 .../ipq806x/base-files/lib/upgrade/platform.sh     |  6 ++-
 target/linux/ipq806x/image/Makefile                | 19 ++++++++-
 .../linux/ipq806x/patches-4.4/800-devicetree.patch |  1 +
 12 files changed, 122 insertions(+), 3 deletions(-)
 create mode 100644 target/linux/ipq806x/base-files/lib/preinit/06_set_iface_mac

diff --git a/include/image-commands.mk b/include/image-commands.mk
index 40a9619..209caf4 100644
--- a/include/image-commands.mk
+++ b/include/image-commands.mk
@@ -167,3 +167,48 @@ define Build/sysupgrade-tar
                --rootfs $(call param_get_default,rootfs,$(1),$(IMAGE_ROOTFS)) \
                $@
 endef
+
+define Build/mkfit-TEW827DRU
+       $(TOPDIR)/scripts/its-maker.sh \
+               --device $(DEVICE_NAME) \
+               -O $@.its \
+               --img-name 0 script \
+               --img-descr 0 "u-boot-HTTP firmware update script" \
+               --img-file 0 
$(TOPDIR)/target/linux/ipq806x/image/tew827dru-flash.scr \
+               --img-type 0 script --img-arch 0 $(ARCH) \
+               --img-compression 0 none \
+               --img-hashes 0 crc32 \
+               --img-name 1 ubi-image \
+               --img-descr 1 "UBI rootfs image" \
+               --img-file 1 $@ \
+               --img-type 1 firmware \
+               --img-arch 1 $(ARCH) \
+               --img-compression 1 none \
+               --img-hashes 1 crc32 \
+               --img-name 2 bootconfig \
+               --img-descr 2 "BOOTCONFIG: boot from APPSBL and rootfs" \
+               --img-file 2 
$(TOPDIR)/target/linux/ipq806x/image/tew827dru-bootconfig.bin \
+               --img-type 2 firmware \
+               --img-arch 2 $(ARCH) \
+               --img-compression 2 none \
+               --img-hashes 2 crc32
+       PATH=$(LINUX_DIR)/scripts/dtc:$(PATH) mkimage -f $@.its $@.fit
+       @rm $@.its
+       @mv $@.fit $@
+endef
+
+define Build/cameo-sig
+       { \
+               cameo_sig=$(word 1, $(1)) ;\
+               align=$(if $(2),$(2),64) ;\
+               oldsize=$$(stat -c %s $@) ;\
+               sigsize=$$(echo -n $$cameo_sig | wc -c) ;\
+               padsize=$$(( ( ( ( $$oldsize + $$sigsize ) / $$align ) + 1 ) - 
( ( $$oldsize + $$sigsize ) / $$align ) )) ;\
+               newsize=$$(( $$oldsize + $$padsize )) ;\
+               echo "Appending Cameo signature: \"$$cameo_sig\", 
oldsize=$$oldsize align=$$align sigsize=$$sigsize padsize=$$padsize 
newsize=$$newsize" ;\
+               dd if=$@ of=$@.new bs=$$newsize count=1 conv=sync ;\
+               echo -n "$$cameo_sig" >> $@.new ; \
+       }
+       @mv $@.new $@
+endef
+
diff --git a/package/boot/uboot-envtools/files/ipq 
b/package/boot/uboot-envtools/files/ipq
index 8cf0ddb..f66aabc 100755
--- a/package/boot/uboot-envtools/files/ipq
+++ b/package/boot/uboot-envtools/files/ipq
@@ -18,6 +18,9 @@ case "$board" in
 "ea8500")
        ubootenv_add_uci_config "/dev/mtd10" "0x0" "0x20000" "0x20000"
        ;;
+"tew827dru")
+       ubootenv_add_uci_config "/dev/mtd9" "0x0" "0x40000" "0x20000" "2"
+       ;;
 esac
 
 config_load ubootenv
diff --git a/target/linux/ipq806x/base-files/etc/board.d/01_leds 
b/target/linux/ipq806x/base-files/etc/board.d/01_leds
index 0b75b11..269dfa8 100755
--- a/target/linux/ipq806x/base-files/etc/board.d/01_leds
+++ b/target/linux/ipq806x/base-files/etc/board.d/01_leds
@@ -33,6 +33,12 @@ ea8500)
        ucidef_set_led_wlan "wifi" "WIFI" "ea8500:green:wifi" "phy0radio"
        ucidef_set_led_default "wps" "WPS" "ea8500:green:wps" "0"
        ;;
+tew827dru)
+       ucidef_set_led_usbdev "usb2" "USB2" "tew827dru:blue:usb" "2-1"
+       # The ledtrig_usbdev kernel module can only map 1 LED-GPIO to 1 USB 
port.
+       # Thus, this only works for one of the two ports, for now.
+       # ucidef_set_led_usbdev "usb4" "USB4" "tew827dru:blue:usb" "4-1"
+       ;;
 *)
        ;;
 esac
diff --git a/target/linux/ipq806x/base-files/etc/board.d/02_network 
b/target/linux/ipq806x/base-files/etc/board.d/02_network
index b720455..e419f9b 100755
--- a/target/linux/ipq806x/base-files/etc/board.d/02_network
+++ b/target/linux/ipq806x/base-files/etc/board.d/02_network
@@ -22,6 +22,10 @@ r7800)
        ucidef_add_switch "switch0" \
                "1:lan" "2:lan" "3:lan" "4:lan" "6@eth1" "5:wan" "0@eth0"
        ;;
+tew827dru)
+       ucidef_add_switch "switch0" \
+               "1:lan" "2:lan" "3:lan" "4:lan" "6t@eth1" "5:wan" "0t@eth0"
+       ;;
 db149)
        ucidef_set_interface_lan "eth1 eth2 eth3"
        ucidef_add_switch "switch0" \
diff --git a/target/linux/ipq806x/base-files/etc/diag.sh 
b/target/linux/ipq806x/base-files/etc/diag.sh
index 0bf5934..11705ee 100755
--- a/target/linux/ipq806x/base-files/etc/diag.sh
+++ b/target/linux/ipq806x/base-files/etc/diag.sh
@@ -11,6 +11,9 @@ get_status_led() {
        ea8500)
                status_led="ea8500:white:power"
                ;;
+       tew827dru)
+               status_led="tew827dru:blue:power"
+               ;;
        esac
 }
 
diff --git 
a/target/linux/ipq806x/base-files/etc/hotplug.d/firmware/11-ath10k-caldata 
b/target/linux/ipq806x/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
index c7977e6..a218183 100644
--- a/target/linux/ipq806x/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
+++ b/target/linux/ipq806x/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
@@ -60,6 +60,10 @@ case "$FIRMWARE" in
          r7800)
                ath10kcal_extract "art" 4096 12064
                ;;
+       tew827dru)
+               hw_mac_addr=$(mtd_get_mac_ascii devinfo hw_mac_addr)
+               ath10kcal_extract "ART" 4096 12064
+               ;;
        esac
        ;;
 "ath10k/cal-pci-0001:01:00.0.bin")
@@ -76,6 +80,10 @@ case "$FIRMWARE" in
         r7800)
                ath10kcal_extract "art" 20480 12064
                ;;
+       tew827dru)
+               hw_mac_addr=$(mtd_get_mac_ascii devinfo hw_mac_addr)
+               ath10kcal_extract "ART" 20480 12064
+               ;;
        esac
        ;;
 *)
diff --git 
a/target/linux/ipq806x/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac 
b/target/linux/ipq806x/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac
index 1ae4352..a3326ab 100644
--- a/target/linux/ipq806x/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac
+++ b/target/linux/ipq806x/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac
@@ -18,6 +18,9 @@ case "$board" in
        ea8500)
                echo $(macaddr_add $(mtd_get_mac_ascii devinfo hw_mac_addr) 
$(($PHYNBR + 1)) ) > /sys${DEVPATH}/macaddress
                ;;
+       tew827dru)
+               echo $(macaddr_add $(mtd_get_mac_ascii APPSBLENV wan_mac) 
$(($PHYNBR + 1)) ) > /sys${DEVPATH}/macaddress
+               ;;
        *)
                ;;
 esac
diff --git a/target/linux/ipq806x/base-files/lib/ipq806x.sh 
b/target/linux/ipq806x/base-files/lib/ipq806x.sh
index 0b11b72..ffd08ea 100644
--- a/target/linux/ipq806x/base-files/lib/ipq806x.sh
+++ b/target/linux/ipq806x/base-files/lib/ipq806x.sh
@@ -38,6 +38,9 @@ ipq806x_board_detect() {
        *"R7800")
                name="r7800"
                ;;
+       "TRENDnet TEW-827DRU")
+               name="tew827dru"
+               ;;
        esac
 
        [ -z "$name" ] && name="unknown"
diff --git a/target/linux/ipq806x/base-files/lib/preinit/06_set_iface_mac 
b/target/linux/ipq806x/base-files/lib/preinit/06_set_iface_mac
new file mode 100644
index 0000000..04d92ff
--- /dev/null
+++ b/target/linux/ipq806x/base-files/lib/preinit/06_set_iface_mac
@@ -0,0 +1,24 @@
+#!/bin/sh
+#
+# Copyright (c) 2014 The Linux Foundation. All rights reserved.
+#
+
+set_ether_mac() {
+       . /lib/functions/uci-defaults.sh
+       . /lib/ipq806x.sh
+       . /lib/functions/system.sh
+
+       board=$(ipq806x_board_name)
+
+       case "$board" in
+       tew827dru)
+               # Set the correct ethernet MAC addresses per OEM intent.
+               ifconfig eth0 hw ether $(mtd_get_mac_ascii APPSBLENV wan_mac) 
2>/dev/null
+               ifconfig eth1 hw ether $(mtd_get_mac_ascii APPSBLENV lan_mac) 
2>/dev/null
+               ;;
+       esac
+
+}
+
+boot_hook_add preinit_main set_ether_mac
+
diff --git a/target/linux/ipq806x/base-files/lib/upgrade/platform.sh 
b/target/linux/ipq806x/base-files/lib/upgrade/platform.sh
index 7726abb..69bda42 100644
--- a/target/linux/ipq806x/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ipq806x/base-files/lib/upgrade/platform.sh
@@ -11,7 +11,8 @@ platform_check_image() {
        ea8500 |\
        r7500 |\
        r7500v2 |\
-       r7800)
+       r7800 |\
+       tew827dru)
                nand_do_platform_check $board $1
                return $?;
                ;;
@@ -36,7 +37,8 @@ platform_pre_upgrade() {
        d7800 |\
        r7500 |\
        r7500v2 |\
-       r7800)
+       r7800 |\
+       tew827dru)
                nand_do_upgrade "$1"
                ;;
        ea8500)
diff --git a/target/linux/ipq806x/image/Makefile 
b/target/linux/ipq806x/image/Makefile
index 8c1064e..43a98ec 100644
--- a/target/linux/ipq806x/image/Makefile
+++ b/target/linux/ipq806x/image/Makefile
@@ -201,6 +201,23 @@ define Device/R7800
        DEVICE_PACKAGES := ath10k-firmware-qca9984
 endef
 
-TARGET_DEVICES += AP148 AP148-legacy C2600 D7800 DB149 EA8500 R7500 R7500v2 
R7800
+define Device/TEW827DRU
+       DEVICE_DTS := qcom-ipq8064-tew827dru
+       BLOCKSIZE := 128KiB
+       PAGESIZE := 2048
+       FILESYSTEMS := squashfs
+       KERNEL_SUFFIX := -uImage
+       KERNEL = kernel-bin | append-dtb | uImage none | pad-to 2k
+       KERNEL_NAME := zImage
+       KERNEL_IN_UBI := 1
+       IMAGES := factory.bin sysupgrade.tar
+       IMAGE/factory.bin := append-ubi | mkfit-TEW827DRU | cameo-sig 
AP148AR9880-RT-150127-00
+       IMAGE/sysupgrade.tar := sysupgrade-tar
+       BOARD_NAME := tew827dru
+       DEVICE_TITLE := TRENDnet TEW-827DRU
+       DEVICE_PACKAGES := ath10k-firmware-qca99x0
+endef
+
+TARGET_DEVICES += AP148 AP148-legacy C2600 D7800 DB149 EA8500 R7500 R7500v2 
R7800 TEW827DRU
 
 $(eval $(call BuildImage))
diff --git a/target/linux/ipq806x/patches-4.4/800-devicetree.patch 
b/target/linux/ipq806x/patches-4.4/800-devicetree.patch
index 85f2534..35308c1 100644
--- a/target/linux/ipq806x/patches-4.4/800-devicetree.patch
+++ b/target/linux/ipq806x/patches-4.4/800-devicetree.patch
@@ -23,6 +23,7 @@ Signed-off-by: Jonas Gorski <j...@openwrt.org>
 +      qcom-ipq8064-r7500.dtb \
 +      qcom-ipq8064-r7500v2.dtb \
 +      qcom-ipq8065-r7800.dtb \
++      qcom-ipq8064-tew827dru.dtb \
        qcom-msm8660-surf.dtb \
        qcom-msm8960-cdp.dtb \
        qcom-msm8974-sony-xperia-honami.dtb
-- 
2.9.3


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