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This commit adds support for the Cisco Meraki Z3. The Z3 is a "teleworker" device with 802.11ac and an integrated 5 port Gigabit switch. Z3 hardware info: * CPU: Qualcomm IPQ4029 * RAM: 512MB DDR3 * Storage: 128 MB (S34ML01G200TFV00) * Networking: QCA8075 internal switch (5x 1GbE ports) * WiFi: QCA4019 802.11b/g/n/ac * 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 `0x24`). 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 <your_tftp> tftpboot openwrt-ipq40xx-generic-meraki_z3-initramfs-uImage.itb ``` * Once booted into the OpenWrt initramfs, created the `ART` ubivol with the WiFi radio calibration from the mtd partition: ``` cat /dev/mtd10 > /tmp/ART.bin ubimkvol /dev/ubi0 -N ART -s 524288 ubiupdatevol /dev/ubi0_1 /tmp/ART.bin ``` * `scp` the `sysupgrade` image to the device and run the normal `sysupgrade` procedure: ``` scp -O openwrt-ipq40xx-generic-meraki_z3-squashfs-sysupgrade.bin root@192.168.1.1:/tmp/ ssh root@192.168.1.1 "sysupgrade -n /tmp/openwrt-ipq40xx-generic-meraki_z3-squashfs-sysupgrade.bin" ``` * OpenWrt should now be installed on the device. Signed-off-by: Hal Martin <hal.martin@gmail.com> Link: https://github.com/openwrt/openwrt/pull/17026 Signed-off-by: Robert Marko <robimarko@gmail.com> |
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