liminix

default.nix (7424B)

---

 {
   system = {
     crossSystem = {
       config = "mips-unknown-linux-musl";
       gcc = {
         abi = "32";
         arch = "24kc";          # maybe mips_24kc-
       };
     };
   };
 
   description = ''
     GL.iNet GL-AR750
     ****************
 
     Hardware summary
     ================
 
     The GL-AR750 "Creta" travel router features:
 
      - QCA9531 @650Mhz SoC
      - dual band wireless: IEEE 802.11a/b/g/n/ac
      - two 10/100Mbps LAN ports and one WAN
      - 128MB DDR2 RAM
      - 16MB NOR Flash
      - supported in OpenWrt by the "ath79" SoC family
 
     The GL-AR750 has two distinct sets of wifi hardware. The 2.4GHz
     radio is part of the QCA9531 SoC, i.e. it's on the same silicon as
     the CPU, the Ethernet, the USB etc. The device is connected to the
     host via `AHB <https://en.wikipedia.org/wiki/Advanced_Microcontroller_Bus_Architecture>`_ and it is
     supported in Linux using the ath9k driver. 5GHz wifi
     is provided by a QCA9887 PCIe (PCI embedded) WLAN chip,
     supported by the ath10k driver.
 
     Installation
     ============
 
     As with many GL.iNet devices, 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.
 
     For flashing from an existing Liminix system (we believe that) it
     is necessary to first boot into a :ref:`system-outputs-kexecboot`
     system, otherwise you'll be overwriting flash partitions while
     they're in use - and that might not end well.
 
     Vendor web page: https://www.gl-inet.com/products/gl-ar750/
 
     OpenWrt web page: https://openwrt.org/toh/gl.inet/gl-ar750
 
   '';
 
   module = {pkgs, config, lim, ... }:
     let
       openwrt = pkgs.openwrt;
       firmwareBlobs = pkgs.pkgsBuildBuild.fetchFromGitHub {
         owner = "kvalo";
         repo = "ath10k-firmware";
         rev = "5d63529ffc6e24974bc7c45b28fd1c34573126eb";
         sha256 = "1bwpifrwl5mvsmbmc81k8l22hmkwk05v7xs8dxag7fgv2kd6lv2r";
       };
       firmware = pkgs.stdenv.mkDerivation {
         name = "wlan-firmware";
         phases = ["installPhase"];
         installPhase = ''
           mkdir -p $out/ath10k/QCA9887/hw1.0/
           blobdir=${firmwareBlobs}/QCA9887/hw1.0
           cp $blobdir/10.2.4-1.0/firmware-5.bin_10.2.4-1.0-00047 $out/ath10k/QCA9887/hw1.0/firmware-5.bin
           cp $blobdir/board.bin  $out/ath10k/QCA9887/hw1.0/
         '';
       };
       mac80211 = pkgs.mac80211.override {
         drivers = ["ath9k" "ath10k_pci"];
         klibBuild = config.system.outputs.kernel.modulesupport;
       };
       ath10k_cal_data =
         let
           offset = lim.parseInt "0x5000";
           size = lim.parseInt "0x844";
         in pkgs.liminix.services.oneshot rec  {
           name = "ath10k_cal_data";
           up = ''
             part=$(basename $(dirname $(grep -l art /sys/class/mtd/*/name)))
             echo ART partition is ''${part-unset}
             test -n "$part" || exit 1
             (in_outputs ${name}
              dd if=/dev/$part of=data iflag=skip_bytes,fullblock bs=${toString size} skip=${toString offset} count=1
             )
         '';
       };
       inherit (pkgs.pseudofile) dir symlink;
       inherit (pkgs.liminix.networking) interface;
     in {
       imports = [
         ../../modules/network
         ../../modules/arch/mipseb.nix
         ../../modules/outputs/tftpboot.nix
         ../../modules/outputs/mtdimage.nix
         ../../modules/outputs/jffs2.nix
       ];
 
       programs.busybox.options = {
         FEATURE_DD_IBS_OBS = "y"; # ath10k_cal_data needs skip_bytes,fullblock
       };
       hardware = {
         defaultOutput = "mtdimage";
         loadAddress = lim.parseInt "0x80060000";
         entryPoint = lim.parseInt "0x80060000";
         flash = {
           address = lim.parseInt "0x9F060000";
           size = lim.parseInt "0xfa0000";
           eraseBlockSize = 65536;
         };
         rootDevice = "/dev/mtdblock5";
         dts = {
           src = "${openwrt.src}/target/linux/ath79/dts/qca9531_glinet_gl-ar750.dts";
           includes =  [
             "${openwrt.src}/target/linux/ath79/dts"
           ];
         };
 
         networkInterfaces =
           let inherit (config.system.service.network) link;
           in {
             lan = link.build { ifname = "eth0"; };
             wan = link.build { ifname = "eth1"; };
             wlan = link.build {
               ifname = "wlan0";
               dependencies = [ mac80211 ];
             };
             wlan5 = link.build {
               ifname = "wlan1";
               dependencies = [ mac80211 ath10k_cal_data ];
             };
           };
       };
       filesystem = dir {
         lib = dir {
           firmware = dir {
             ath10k = dir {
               QCA9887 = symlink "${firmware}/ath10k/QCA9887";
               "cal-pci-0000:00:00.0.bin" = symlink "${ath10k_cal_data}/.outputs/data";
             };
           };
         };
       };
       boot.tftp = {
         loadAddress = lim.parseInt "0x00A00000";
       };
       kernel = {
         src = pkgs.pkgsBuildBuild.fetchurl {
           name = "linux.tar.gz";
           url = "https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.15.71.tar.gz";
           hash = "sha256-yhO2cXIeIgUxkSZf/4aAsF11uxyh+UUZu6D1h92vCD8=";
         };
 
         # Mainline linux 5.19 doesn't have device-tree support for
         # this device or even for the SoC, so we use the extensive
         # OpenWrt kernel patches
         extraPatchPhase = ''
           ${openwrt.applyPatches.ath79}
         '';
 
         config = {
           ATH79 = "y";
           PCI = "y";
           PCI_AR724X = "y";
 
           SERIAL_8250_CONSOLE = "y";
           SERIAL_8250 = "y";
           SERIAL_CORE_CONSOLE = "y";
 
           # need this to open console device at boot. dmesg goes from
           # [    0.272934] Warning: unable to open an initial console.
           # to
           # [    0.247413] printk: console [ttyS0] disabled
           # [     0.25200] 18020000.uart: ttyS0 at MMIO 0x1802000 (irq = 10, base_baud = 1562500) is a 16550A
           SERIAL_OF_PLATFORM = "y";
 
           CONSOLE_LOGLEVEL_DEFAULT = "8";
           CONSOLE_LOGLEVEL_QUIET = "4";
 
           NET = "y";
           ETHERNET = "y";
           NET_VENDOR_ATHEROS = "y";
           AG71XX = "y";             # ethernet (qca,qca9530-eth)
           MFD_SYSCON = "y";         # ethernet (compatible "syscon")
           AR8216_PHY = "y";         # eth1 is behind a switch
 
           MTD_SPI_NOR = "y";
 
           SPI_ATH79 = "y";      # these are copied from OpenWrt.
           SPI_MASTER= "y";      # At least one of them is necessary
           SPI_MEM= "y";
           SPI_AR934X= "y";
           SPI_BITBANG= "y";
           SPI_GPIO= "y";
 
           GPIO_ATH79 = "y";
           GPIOLIB = "y";
           EXPERT="y";
           GPIO_SYSFS = "y"; # required by patches-5.15/0004-phy-add-ath79-usb-phys.patch
           OF_GPIO = "y";
           SYSFS = "y";
           SPI = "y";
           MTD = "y";
           MTD_BLOCK = "y";          # fix undefined ref to register_mtd_blktrans_devs
 
           WATCHDOG = "y";
           ATH79_WDT = "y";  # watchdog timer
 
           # this is all copied from nixwrt ath79 config. Clearly not all
           # of it is device config, some of it is wifi config or
           # installation method config or ...
 
           EARLY_PRINTK = "y";
 
           PRINTK_TIME = "y";
         };
       };
     };
 }