econet: Add new target TP-Link Archer VR1200v (v2)

The TP-Link Archer VR1200v (v2) is a low end DSL modem based on the
EcoNet EN751221 processor platform.

While it does have an unlocked bootloader, the factory upgrade feature
requires a cryptographic signature so flashing from the web UI is not
feasible.

The Archer VR1200v (v2) uses a dual-image layout. I have chosen to reuse
this to support dual-boot between OpenWRT and the factory firmware.

Flashing instructions (from bootloader):

Build and then locate the squashfs-sysupgrade.bin image file
Get the length of that file in hex: printf '%X\n' "$(stat -c%s the-file-squashfs-sysupgrade.bin)"
Connect to device with xmodem capability, e.g. picocom --send-cmd lsx -vv -b 115200 /dev/ttyUSB0
Switch device on and press a key within 3 seconds, you should get to a `bldr>` prompt
Type: xmdm 80020000 <file length hex>
Quickly start xmodem and send the file, in picocom that is ctrl+a ctrl+s <paste-the-file-name> enter If the transfer fails to start, wait 30 seconds to a minute for the bootloader prompt to return and then try the command again.
Once the transfer has completed successfully, type the following flash 80000 80020000 <file length hex>
Type `re` or simply restart the device to boot into OpenWRT

Signed-off-by: Caleb James DeLisle <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/19021
Signed-off-by: Hauke Mehrtens <[email protected]>

diff --git a/target/linux/econet/dts/en751221_tplink_archer-vr1200v-v2.dts b/target/linux/econet/dts/en751221_tplink_archer-vr1200v-v2.dts
new file mode 100644 (file)
index 0000000..1866b44
--- /dev/null
+++ b/target/linux/econet/dts/en751221_tplink_archer-vr1200v-v2.dts
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/dts-v1/;
+
+#include "en751221.dtsi"
+
+/ {
+       model = "TP-Link Archer VR1200v (v2)";
+       compatible = "tplink,archer-vr1200v-v2", "econet,en751221";
+
+       memory@0 {
+               device_type = "memory";
+               reg = <0x00000000 0x8000000>;
+       };
+
+       chosen {
+               stdout-path = "/serial@1fbf0000:115200";
+               linux,usable-memory-range = <0x00020000 0x07fe0000>;
+       };
+};
+
+&nand {
+       status = "okay";
+       econet,bmt;
+
+       partitions {
+               compatible = "fixed-partitions";
+               #address-cells = <1>;
+               #size-cells = <1>;
+
+               partition@0 {
+                       label = "bootloader";
+                       reg = <0x0 0x00080000>;
+                       read-only;
+               };
+               partition@80000 {
+                       label = "misc";
+                       reg = <0x00080000 0x140000>;
+               };
+               partition@1c0200 {
+                       label = "kernel";
+                       reg = <0x001c0000 0x400000>;
+               };
+               partition@5c0000 {
+                       label = "rootfs";
+                       reg = <0x005c0000 0x1a40000>;
+                       linux,rootfs;
+               };
+               partition@1c0000 {
+                       label = "firmware";
+                       reg = <0x001c0000 0x1e40000>;
+               };
+               partition@2000000 {
+                       label = "firmware_factory";
+                       reg = <0x2000000 0x1e40000>;
+               };
+               partition@3fe0000 {
+                       label = "reserve";
+                       reg = <0x3fe0000 0x20000>;
+               };
+               partition@4000000 {
+                       label = "openwrt_ubi";
+                       /* From the factory this is unallocated space, so it's ours for the taking.
+                        * We have up to 0x35e0000 of space, but we reserve 10 eraseblocks (1.25MB)
+                        * in case the BMT steals them from us.
+                        */
+                       reg = <0x4000000 0x34a0000>;
+               };
+       };
+};

diff --git a/target/linux/econet/image/Makefile b/target/linux/econet/image/Makefile
index 95bff987cf6689b292a6dc30ebce91d19f3967aa..94804115cfca1563ce27dfb9b1a1e6b27151aac9 100644 (file)
--- a/target/linux/econet/image/Makefile
+++ b/target/linux/econet/image/Makefile
@@ -30,4 +30,22 @@ define Device/smartfiber_xp8421-b
 endef
 TARGET_DEVICES += smartfiber_xp8421-b
 
+# NOTE: This will not work for upgrading from factory because it requires a cryptographic signature
+#       however, it it can be flashed, then it will boot correctly.
+define Device/tplink_archer-vr1200v-v2
+  DEVICE_VENDOR := TP-Link
+  DEVICE_MODEL := Archer vr1200v
+  DEVICE_VARIANT := v2
+  TPLINK_FLASHLAYOUT := 16Mmtk
+  TPLINK_HWID := 0x0b473502
+  TPLINK_HWREV := 0x0006007c
+  TPLINK_HWREVADD := 0x0
+  TPLINK_HVERSION := 3
+  DEVICE_DTS := en751221_tplink_archer-vr1200v-v2
+  IMAGES := sysupgrade.bin
+  IMAGE/sysupgrade.bin := append-kernel | lzma | pad-to 4193792 | append-rootfs | \
+    tplink-v2-header -R 0x400000
+endef
+TARGET_DEVICES += tplink_archer-vr1200v-v2
+
 $(eval $(call BuildImage))