Adding OpenWrt support for Xiaomi "Redmi Router AX6S"/"Xiaomi Router AX3200"

remittor · February 18, 2024, 6:56am

Original nvram options:

  boot_auto=bootxq
  boot_fw0=run boot_rd_img;bootm
  boot_fw1=run boot_rd_img2;bootm
  boot_rd_img=nand read ${loadaddr} 0x2C0000 2000;image_blks 2048;nand read ${loadaddr} 0x2C0000 ${img_align_size}
  boot_rd_img2=nand read ${loadaddr} 0x20C0000 2000;image_blks 2048;nand read ${loadaddr} 0x20C0000 ${img_align_size}

I think that to support kernel 6.x we will change this:

github.com

openwrt/openwrt/blob/49ed52b862c9f3e0dc1c1024ccd4db3bc9795122/target/linux/mediatek/dts/mt7622-xiaomi-redmi-router-ax6s.dts#L298-L316


      
          			/* Shrunk and renamed from "firmware"
          			 * as to not break luci size checks
          			 */
          			partition@2c0000 {
          				label = "kernel";
          				reg = <0x2c0000 0x400000>;
          			};
          
          			/* ubi partition is the result of squashing
          			 * consecutive stock partitions:
          			 * - firmware (partially)
          			 * - firmware1
          			 * - overlay
          			 * - obr
          			 */
          			partition@6c0000 {
          				label = "ubi";
          				reg = <0x6C0000 0x6f00000>;
          			};

And add similar patch: https://github.com/openwrt/openwrt/commit/e8646f5b3d050d61084b4cf373f8f64507ced8a6

And to switch from OpenWRT 23.x to OpenWRT 24.x, the user must run the following commands:

dd if=factory.bin bs=1M count=4 | mtd write - kernel
dd if=factory.bin bs=1M skip=4 count=2 | mtd write - ubi
dd if=factory.bin bs=1M skip=6  | mtd -p 2097152 write - ubi
reboot -f