ath79: add support for Teltonika RUT955

Specification:

- 550/400/200 MHz (CPU/DDR/AHB)
- 128 MB of RAM (DDR2)
- 16 MB of FLASH (SPI NOR)
- 4x 10/100 Mbps Ethernet, with passive PoE support on LAN1
- 2T2R 2,4 GHz (AR9344)
- built-in 4G/3G module (example: Quectel EC-25EU)
- internal microSD slot (spi-mmc, buggy and disabled for now)
- RS232 on D-Sub9 port (Cypress ACM via USB, /dev/ttyACM0)
- RS422/RS485 (AR934x high speed UART, /dev/ttyATH1)
- analog 0-24V input (MCP3221)
- various digital inputs and outputs incl. a relay
- 11x LED (4 are driven by AR9344, 7 by 74HC595)
- 2x miniSIM slot (can be swapped via GPIO)
- 2x RP-SMA/F (Wi-Fi), 3x SMA/F (2x WWAN, GPS)
- 1x button (reset)
- DC jack for main power input (9-30 V)
- debugging UART available on PCB edge connector

Serial console (/dev/ttyS0) pinout:

- RX: pin1 (square) on top side of the main PCB (AR9344 is on top)
- TX: pin1 (square) on bottom side

Flash instruction:

Vendor firmware is based on OpenWrt CC release. Use the "factory" image
directly in GUI (make sure to uncheck "keep settings") or in U-Boot web
based recovery. To avoid any problems, make sure to first update vendor
firmware to latest version - "factory" image was successfully tested on
device running "RUT9XX_R_00.06.051" firmware and U-Boot "3.0.2".

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/target/linux/ath79/image/generic.mk b/target/linux/ath79/image/generic.mk
index 1fa9b30c51..3c0aa2ee4d 100644
--- a/target/linux/ath79/image/generic.mk
+++ b/target/linux/ath79/image/generic.mk
@@ -36,6 +36,11 @@ define Build/addpattern
 	-mv "$@.new" "$@"
 endef
 
+define Build/append-md5sum-bin
+	$(STAGING_DIR_HOST)/bin/mkhash md5 $@ | sed 's/../\\\\x&/g' |\
+		xargs echo -ne >> $@
+endef
+
 define Build/cybertan-trx
 	@echo -n '' > $@-empty.bin
 	-$(STAGING_DIR_HOST)/bin/trx -o $@.new \
@@ -73,6 +78,17 @@ define Build/pisen_wmb001n-factory
   rm -rf "$@.tmp"
 endef
 
+define Build/teltonika-fw-fake-checksum
+	# Teltonika U-Boot web based firmware upgrade/recovery routine compares
+	# 16 bytes from md5sum1[16] field in TP-Link v1 header (offset: 76 bytes
+	# from begin of the firmware file) with 16 bytes stored just before
+	# 0xdeadc0de marker. Values are only compared, MD5 sum is not verified.
+	let \
+		offs="$$(stat -c%s $@) - 20"; \
+		dd if=$@ bs=1 count=16 skip=76 |\
+		dd of=$@ bs=1 count=16 seek=$$offs conv=notrunc
+endef
+
 define Device/seama
   KERNEL := kernel-bin | append-dtb | relocate-kernel | lzma
   KERNEL_INITRAMFS := $$(KERNEL) | seama
@@ -1070,6 +1086,28 @@ define Device/sitecom_wlr-7100
 endef
 TARGET_DEVICES += sitecom_wlr-7100
 
+define Device/teltonika_rut955
+  SOC := ar9344
+  DEVICE_VENDOR := Teltonika
+  DEVICE_MODEL := RUT955
+  DEVICE_PACKAGES := kmod-usb2 kmod-usb-acm kmod-usb-net-qmi-wwan \
+	kmod-usb-serial-option kmod-hwmon-mcp3021 uqmi -uboot-envtools
+  IMAGE_SIZE := 15552k
+  TPLINK_HWID := 0x35000001
+  TPLINK_HWREV := 0x1
+  TPLINK_HEADER_VERSION := 1
+  KERNEL := kernel-bin | append-dtb | lzma | tplink-v1-header
+  KERNEL_INITRAMFS := kernel-bin | append-dtb | lzma | uImage lzma
+  IMAGES += factory.bin
+  IMAGE/factory.bin := append-kernel | pad-to $$$$(BLOCKSIZE) | append-rootfs |\
+	pad-rootfs | teltonika-fw-fake-checksum | append-string master |\
+	append-md5sum-bin | check-size $$$$(IMAGE_SIZE)
+  IMAGE/sysupgrade.bin := append-kernel | pad-to $$$$(BLOCKSIZE) |\
+	append-rootfs | pad-rootfs | append-metadata |\
+	check-size $$$$(IMAGE_SIZE)
+endef
+TARGET_DEVICES += teltonika_rut955
+
 define Device/trendnet_tew-823dru
   SOC := qca9558
   DEVICE_VENDOR := Trendnet