From 11f7aa122ae7e63ede8bae0f3cad3f688f917e63 Mon Sep 17 00:00:00 2001 From: Hal Martin Date: Sun, 19 Oct 2025 12:13:54 +0200 Subject: [PATCH] ipq40xx: add support for Cisco Meraki Go GX20 This commit adds support for the Cisco Meraki Go GX20. The Go GX20 is a wired router with 5 port Gigabit switch. It shares the same PCB as the Meraki Z3, but without the WiFi radios. GX20 hardware info: * CPU: Qualcomm IPQ4029 * RAM: 512MB DDR3 * Storage: 128 MB (S34ML01G200TFV00) * Networking: QCA8075 internal switch (5x 1GbE ports) * USB: 1x USB3.0 * Serial: Internal header (J8, 2.54mm, populated) Port 5 has POE output (802.3af). The Internet/WAN port is used for tftp booting in U-Boot. This device ships with secure boot, and cannot be flashed without external programmers (TSOP48 NAND and I2C EEEPROM)! Disassembly: * Remove the four T8 screws on the bottom of the device under the rubber feet. * Using a guitar pick or similar plastic tool, insert it on the side between the bottom case and the side, pry up gently. The plastic bottom has several latches around the perimeter (but none on the rear by the Ethernet ports). * The TSOP48 NAND flash (U30, Spansion S34ML01G200TFV00) is located on the bottom side of the PCB (facing you as you remove the bottom plastic). To flash, you will need to desolder the TSOP48. Attempts to flash in-circuit using a 360 clip were unsuccessful. * The SOIC8 I2C EEPROM (U32, Atmel 24C64) is located on the bottom side of the PCB (facing you as you remove the bottom plastic). It can be flashed in circuit using a SOIC8 chip clip. Installation: The dumps to flash can be found in this repository: https://github.com/halmartin/meraki-openwrt-docs/tree/main/z3_gx20 The device has the following flash layout (offsets with OOB data): ``` 0x000000000000-0x000000100000 : "sbl1" 0x000000100000-0x000000200000 : "mibib" 0x000000200000-0x000000300000 : "bootconfig" 0x000000300000-0x000000400000 : "qsee" 0x000000400000-0x000000500000 : "qsee_alt" 0x000000500000-0x000000580000 : "cdt" 0x000000580000-0x000000600000 : "cdt_alt" 0x000000600000-0x000000680000 : "ddrparams" 0x000000700000-0x000000900000 : "u-boot" 0x000000900000-0x000000b00000 : "u-boot-backup" 0x000000b00000-0x000000b80000 : "ART" 0x000000c00000-0x000007c00000 : "ubi" ``` * Dump your original NAND (if using nanddump, include OOB data). * Decompress `u-boot.bin.gz` dump from the GitHub repository above (dump contains OOB data) and overwrite the `u-boot` portion of NAND from `0x738000`-`0x948000` (length `0x210000`). Offsets here include OOB data. * Decompress `ubi.bin.gz` dump from the GitHub repository above (dump contains OOB data) and overwrite the `ubi` portion of NAND from `0xc60000`-`0x8400000` (length `0x77a0000`). Offsets here include OOB data. * Dump your original EEPROM. Change the byte at offset `0x49` to `0x1e` (originally `0x2b`). Remember to re-write the EEPROM with the modified data. * This can be done on Linux via the following command: `printf "\x1e" | dd of=/tmp/eeprom.bin bs=1 seek=$((0x49)) conv=notrunc` **Note**: the device will not boot if you modify the board major number and have not yet overwritten the `ubi` and `u-boot` regions of NAND. * Resolder the NAND after overwriting the `u-boot` and `ubi` regions. OpenWrt Installation: * After flashing NAND and EEPROM with external programmers. Plug an Ethernet cable into the Internet/WAN port. Power up the device. * The new U-Boot build uses the space character `" "` (without quotes) to interrupt boot. * Interrupt U-Boot and `tftpboot` the OpenWrt initramfs image from your tftp server ``` dhcp setenv serverip tftpboot openwrt-ipq40xx-generic-meraki_gx20-initramfs-uImage.itb ``` * Once booted into the OpenWrt initramfs, `scp` the `sysupgrade` image to the device and run the normal `sysupgrade` procedure: ``` scp -O openwrt-ipq40xx-generic-meraki_gx20-squashfs-sysupgrade.bin root@192.168.1.1:/tmp/ ssh root@192.168.1.1 "sysupgrade -n /tmp/openwrt-ipq40xx-generic-meraki_gx20-squashfs-sysupgrade.bin" ``` * OpenWrt should now be installed on the device. Signed-off-by: Hal Martin Link: https://github.com/openwrt/openwrt/pull/17026 Signed-off-by: Robert Marko --- .../ipq40xx/base-files/etc/board.d/01_leds | 1 + .../ipq40xx/base-files/etc/board.d/02_network | 1 + .../base-files/etc/board.d/03_gpio_switches | 1 + .../base-files/lib/upgrade/platform.sh | 1 + .../arm/boot/dts/qcom/qcom-ipq4029-gx20.dts | 109 ++++++++++++++++++ 5 files changed, 113 insertions(+) create mode 100644 target/linux/ipq40xx/files-6.12/arch/arm/boot/dts/qcom/qcom-ipq4029-gx20.dts diff --git a/target/linux/ipq40xx/base-files/etc/board.d/01_leds b/target/linux/ipq40xx/base-files/etc/board.d/01_leds index 9fd42a56ea..96ad903244 100644 --- a/target/linux/ipq40xx/base-files/etc/board.d/01_leds +++ b/target/linux/ipq40xx/base-files/etc/board.d/01_leds @@ -96,6 +96,7 @@ mobipromo,cm520-79f) ucidef_set_led_netdev "lan1" "LAN1" "blue:lan1" "lan1" ucidef_set_led_netdev "lan2" "LAN2" "blue:lan2" "lan2" ;; +meraki,gx20 |\ meraki,z3) ucidef_set_led_netdev "wan_link" "WAN (link)" "green:wan-0" "wan" "link" ucidef_set_led_netdev "wan_act" "WAN (txrx)" "green:wan-1" "wan" "tx rx" diff --git a/target/linux/ipq40xx/base-files/etc/board.d/02_network b/target/linux/ipq40xx/base-files/etc/board.d/02_network index 3f4ca99b0f..af92401a30 100644 --- a/target/linux/ipq40xx/base-files/etc/board.d/02_network +++ b/target/linux/ipq40xx/base-files/etc/board.d/02_network @@ -29,6 +29,7 @@ ipq40xx_setup_interfaces() zyxel,nbg6617) ucidef_set_interfaces_lan_wan "lan1 lan2 lan3 lan4" "wan" ;; + meraki,gx20|\ meraki,z3) ucidef_set_interfaces_lan_wan "lan2 lan3 lan4 lan5" "wan" ;; diff --git a/target/linux/ipq40xx/base-files/etc/board.d/03_gpio_switches b/target/linux/ipq40xx/base-files/etc/board.d/03_gpio_switches index fc43ae3d0f..003fd685b9 100644 --- a/target/linux/ipq40xx/base-files/etc/board.d/03_gpio_switches +++ b/target/linux/ipq40xx/base-files/etc/board.d/03_gpio_switches @@ -21,6 +21,7 @@ cilab,meshpoint-one) compex,wpj428) ucidef_add_gpio_switch "sim_card_select" "SIM card select" "3" "0" ;; +meraki,gx20|\ meraki,z3) ucidef_add_gpio_switch "lan5_poe_disable" "LAN5 PoE disable" "540" "0" ;; diff --git a/target/linux/ipq40xx/base-files/lib/upgrade/platform.sh b/target/linux/ipq40xx/base-files/lib/upgrade/platform.sh index 298ba6eb9c..cea5b0ce69 100644 --- a/target/linux/ipq40xx/base-files/lib/upgrade/platform.sh +++ b/target/linux/ipq40xx/base-files/lib/upgrade/platform.sh @@ -183,6 +183,7 @@ platform_do_upgrade() { CI_KERNPART="part.safe" nand_do_upgrade "$1" ;; + meraki,gx20|\ meraki,z3) # DO NOT set CI_KERNPART to part.safe, # that is used for chain-loading an unlocked u-boot diff --git a/target/linux/ipq40xx/files-6.12/arch/arm/boot/dts/qcom/qcom-ipq4029-gx20.dts b/target/linux/ipq40xx/files-6.12/arch/arm/boot/dts/qcom/qcom-ipq4029-gx20.dts new file mode 100644 index 0000000000..0c951e56da --- /dev/null +++ b/target/linux/ipq40xx/files-6.12/arch/arm/boot/dts/qcom/qcom-ipq4029-gx20.dts @@ -0,0 +1,109 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Device Tree Source for Meraki Go GX20 (Fairyfly) + +#include "qcom-ipq4029-wired-qca-common.dtsi" + +/ { + model = "Meraki Go GX20 Router"; + compatible = "meraki,gx20"; + + leds { + compatible = "gpio-leds"; + + power_orange: power { + color = ; + function = LED_FUNCTION_POWER; + gpios = <&tlmm 49 GPIO_ACTIVE_LOW>; + panic-indicator; + }; + + led-1 { + /* WAN left */ + color = ; + function = LED_FUNCTION_WAN; + function-enumerator = <0>; + gpios = <&tlmm 46 GPIO_ACTIVE_LOW>; + }; + + led-2 { + /* WAN right */ + color = ; + function = LED_FUNCTION_WAN; + function-enumerator = <1>; + gpios = <&tlmm 30 GPIO_ACTIVE_LOW>; + }; + + led-3 { + /* port 2 left */ + color = ; + function = LED_FUNCTION_LAN; + function-enumerator = <2>; + gpios = <&tlmm 23 GPIO_ACTIVE_LOW>; + }; + + led-4 { + /* port 2 right */ + color = ; + function = LED_FUNCTION_LAN; + function-enumerator = <3>; + gpios = <&tlmm 22 GPIO_ACTIVE_LOW>; + }; + + led-5 { + /* port 3 left */ + color = ; + function = LED_FUNCTION_LAN; + function-enumerator = <4>; + gpios = <&tlmm 25 GPIO_ACTIVE_LOW>; + }; + + led-6 { + /* port 3 right */ + color = ; + function = LED_FUNCTION_LAN; + function-enumerator = <5>; + gpios = <&tlmm 24 GPIO_ACTIVE_LOW>; + }; + + led-7 { + /* port 4 left */ + color = ; + function = LED_FUNCTION_LAN; + function-enumerator = <6>; + gpios = <&tlmm 29 GPIO_ACTIVE_LOW>; + }; + + led-8 { + /* port 4 right */ + color = ; + function = LED_FUNCTION_LAN; + function-enumerator = <7>; + gpios = <&tlmm 26 GPIO_ACTIVE_LOW>; + }; + + led-9 { + /* port 5 left */ + color = ; + function = LED_FUNCTION_LAN; + function-enumerator = <8>; + gpios = <&tlmm 33 GPIO_ACTIVE_LOW>; + }; + + led-10 { + /* port 5 right */ + color = ; + function = LED_FUNCTION_LAN; + function-enumerator = <9>; + gpios = <&tlmm 32 GPIO_ACTIVE_LOW>; + }; + }; +}; + +/* GX20 does not have WiFi radios */ +&wifi0 { + status = "disabled"; +}; + +&wifi1 { + status = "disabled"; +}; -- 2.30.2