liminix/devices/gl-mt300a/default.nix

# GL.iNet GL-MT300A

{
  system = {
    crossSystem = {
      config = "mipsel-unknown-linux-musl";
      gcc = {
        abi = "32";
        arch = "mips32"; # maybe mips_24kc-
      };
    };
  };

  description = ''
    GL.iNet GL-MT300A
    *****************

    The GL-MT300A is based on a MT7620 chipset.

    For flashing from U-Boot, the firmware partition is from
    0xbc050000 to 0xbcfd0000.

    WiFi on this device is provided by the rt2800soc module. It
    expects firmware to be present in the "factory" MTD partition, so
    - assuming we want to use the wireless - we need to build MTD
    support into the kernel even if we're using TFTP root.

    Installation
    ============

    The stock vendor firmware is a fork of OpenWrt, meaning that the
    binary created by :ref:`system-outputs-mtdimage` can be flashed
    using the vendor web UI or the U-Boot emergency "unbrick" routine.

    Flashing over an existing Liminix system is not possible while
    that system is running, otherwise you'll be overwriting flash
    partitions while they're in use - and that might not end well.
    Configure the system with :ref:`levitate` if you need to
    make it upgradable.

    Vendor web page: https://www.gl-inet.com/products/gl-mt300a/

    OpenWrt web page: https://openwrt.org/toh/gl.inet/gl-mt300a

  '';

  module =
    {
      pkgs,
      config,
      lib,
      lim,
      ...
    }:
    let
      inherit (pkgs) openwrt;
      mac80211 = pkgs.kmodloader.override {
        targets = [ "rt2800soc" ];
        inherit (config.system.outputs) kernel;
      };
    in
    {
      imports = [
        ../../modules/arch/mipsel.nix
        ../../modules/outputs/tftpboot.nix
        ../../modules/outputs/mtdimage.nix
        ../../modules/outputs/jffs2.nix
      ];
      hardware = {
        defaultOutput = "mtdimage";
        loadAddress = lim.parseInt "0x80000000";
        entryPoint = lim.parseInt "0x80000000";

        # Creating 5 MTD partitions on "spi0.0":
        # 0x000000000000-0x000000030000 : "u-boot"
        # 0x000000030000-0x000000040000 : "u-boot-env"
        # 0x000000040000-0x000000050000 : "factory"
        # 0x000000050000-0x000000fd0000 : "firmware"
        # 2 uimage-fw partitions found on MTD device firmware
        # Creating 2 MTD partitions on "firmware":
        # 0x000000000000-0x000000260000 : "kernel"
        # 0x000000260000-0x000000f80000 : "rootfs"

        flash = {
          address = lim.parseInt "0xbc050000";
          size = lim.parseInt "0xf80000";
          eraseBlockSize = 65536;
        };
        rootDevice = "/dev/mtdblock5";

        dts = {
          src = "${openwrt.src}/target/linux/ramips/dts/mt7620a_glinet_gl-mt300a.dts";
          includePaths = [
            "${openwrt.src}/target/linux/ramips/dts"
          ];
        };
        networkInterfaces =
          let
            inherit (config.system.service.network) link;
            inherit (config.system.service) vlan;
          in
          rec {
            eth = link.build { ifname = "eth0"; };
            # lan and wan ports are both behind a switch on eth0
            lan = vlan.build {
              ifname = "eth0.1";
              primary = eth;
              vid = "1";
            };
            wan = vlan.build {
              ifname = "eth0.2";
              primary = eth;
              vid = "2";
            };
            wlan = link.build {
              ifname = "wlan0";
              dependencies = [ mac80211 ];
            };
          };
      };
      boot.tftp = {
        loadAddress = lim.parseInt "0x00A00000";
        appendDTB = true;
      };

      kernel = {
        extraPatchPhase = ''
          ${openwrt.applyPatches.ramips}
          ${openwrt.applyPatches.rt2x00}
        '';
        config =
          {

            RALINK = "y";
            PCI = "y";
            SOC_MT7620 = "y";

            SERIAL_8250_CONSOLE = "y";
            SERIAL_8250 = "y";
            SERIAL_CORE_CONSOLE = "y";
            SERIAL_OF_PLATFORM = "y";

            CONSOLE_LOGLEVEL_DEFAULT = "8";
            CONSOLE_LOGLEVEL_QUIET = "4";

            NET = "y";
            ETHERNET = "y";
            NET_VENDOR_RALINK = "y";
            NET_RALINK_MDIO = "y";
            NET_RALINK_MDIO_MT7620 = "y";
            NET_RALINK_MT7620 = "y";
            SWPHY = "y";

            SPI = "y";
            MTD_SPI_NOR = "y";
            SPI_MT7621 = "y"; # } probably don't need both of these
            SPI_RT2880 = "y"; # }
            SPI_MASTER = "y";
            SPI_MEM = "y";

            MTD = "y";
            MTD_BLOCK = "y"; # fix undefined ref to register_mtd_blktrans_devs

            EARLY_PRINTK = "y";

            NEW_LEDS = "y";
            LEDS_CLASS = "y"; # required by rt2x00lib

            PRINTK_TIME = "y";
          }
          // lib.optionalAttrs (config.system.service ? vlan) {
            SWCONFIG = "y";
          };
        conditionalConfig = {
          WLAN = {
            WLAN_VENDOR_RALINK = "y";
            RT2800SOC = "m";
            RT2X00 = "m";
          };
        };

      };
    };
}