f1b7780537
by having two separate derivations for patching the kernel source tree and building it, we have to copy said source trees from one store location to another which takes non-neglible time on spinning rust (literally minutes on my machine). Replace with a single derivation that can do more things on one tree in-place
145 lines
4.7 KiB
Nix
145 lines
4.7 KiB
Nix
# GL.INet GL-AR750 "Creta" travel router
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# - QCA9531 @650Mhz SoC
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# - dual band wireless: IEEE 802.11a/b/g/n/ac
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# - two 10/100Mbps LAN ports and one WAN
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# - 128MB DDR2 RAM / 16MB NOR Flash
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# - "ath79" soc family
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# https://www.gl-inet.com/products/gl-ar750/
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# I like GL.iNet devices because they're relatively accessible to
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# DIY users: the serial port connections have headers preinstalled
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# and don't need soldering
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# Mainline linux 5.19 doesn't have device-tree support for this device
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# or even for the SoC, so we use the extensive OpenWrt kernel patches
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{
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system = {
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crossSystem = {
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config = "mips-unknown-linux-musl";
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gcc = {
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abi = "32";
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arch = "mips32"; # maybe mips_24kc-
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};
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};
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};
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# We need to be able to import default.nix before we import nixpkgs
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# because it has the system config to tell nixpkgs what arch to build for.
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# But we also need some way to do things like fetchFromGitHub in the
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# per-device config and we can only do that once we have a reference to
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# pkgs
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overlay = final: prev:
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let
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openwrt = final.fetchFromGitHub {
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name = "openwrt-source";
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repo = "openwrt";
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owner = "openwrt";
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rev = "a5265497a4f6da158e95d6a450cb2cb6dc085cab";
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hash = "sha256-YYi4gkpLjbOK7bM2MGQjAyEBuXJ9JNXoz/JEmYf8xE8=";
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};
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in {
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kernel = prev.kernel.override {
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src = final.fetchurl {
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name = "linux.tar.gz";
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url = "https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.15.71.tar.gz";
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hash = "sha256-yhO2cXIeIgUxkSZf/4aAsF11uxyh+UUZu6D1h92vCD8=";
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};
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extraPatchPhase = ''
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cp -av ${openwrt}/target/linux/generic/files/* .
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chmod -R u+w .
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cp -av ${openwrt}/target/linux/ath79/files/* .
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chmod -R u+w .
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patches() {
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for i in $* ; do patch --batch --forward -p1 < $i ;done
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}
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patches ${openwrt}/target/linux/generic/backport-5.15/*.patch
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patches ${openwrt}/target/linux/generic/pending-5.15/*.patch
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patches ${openwrt}/target/linux/generic/hack-5.15/*.patch
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patches ${openwrt}/target/linux/ath79/patches-5.15/*.patch
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'';
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};
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};
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kernel = rec {
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checkedConfig = {
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MIPS_ELF_APPENDED_DTB = "y";
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OF = "y";
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USE_OF = "y";
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ATH79 = "y";
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SERIAL_8250_CONSOLE = "y";
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SERIAL_8250 = "y";
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SERIAL_CORE_CONSOLE = "y";
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# need this to open console device at boot. dmesg goes from
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# [ 0.272934] Warning: unable to open an initial console.
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# to
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# [ 0.247413] printk: console [ttyS0] disabled
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# [ 0.25200] 18020000.uart: ttyS0 at MMIO 0x1802000 (irq = 10, base_baud = 1562500) is a 16550A
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SERIAL_OF_PLATFORM = "y";
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CONSOLE_LOGLEVEL_DEFAULT = "8";
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CONSOLE_LOGLEVEL_QUIET = "4";
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# "empty" initramfs source should create an initial
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# filesystem that has a /dev/console node and not much
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# else. Note that pid 1 is started *before* the root
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# filesystem is mounted and it expects /dev/console to
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# be present already
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BLK_DEV_INITRD = "n";
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NET = "y";
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NETDEVICES = "y";
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ETHERNET = "y";
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NET_VENDOR_ATHEROS = "y";
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AG71XX = "y"; # ethernet (qca,qca9530-eth)
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MFD_SYSCON = "y"; # ethernet (compatible "syscon")
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AR8216_PHY = "y"; # eth1 is behind a switch
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MTD = "y";
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MTD_CMDLINE_PARTS = "y";
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MTD_BLOCK = "y"; # fix undefined ref to register_mtd_blktrans_devs
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CPU_BIG_ENDIAN= "y";
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# this is all copied from nixwrt ath79 config. Clearly not all
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# of it is device config, some of it is wifi config or
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# installation method config or ...
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"CMDLINE_PARTITION" = "y";
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"EARLY_PRINTK" = "y";
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"FW_LOADER" = "y";
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# we don't have a user helper, so we get multiple 60s pauses
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# at boot time unless we disable trying to call it
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"FW_LOADER_USER_HELPER" = "n";
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"MODULE_SIG" = "y";
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"PARTITION_ADVANCED" = "y";
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"PRINTK_TIME" = "y";
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"SQUASHFS" = "y";
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"SQUASHFS_XZ" = "y";
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# "ASN1" = "y";
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# "ASYMMETRIC_KEY_TYPE" = "y";
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# "ASYMMETRIC_PUBLIC_KEY_SUBTYPE" = "y";
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# "CRC_CCITT" = "y";
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# "CRYPTO" = "y";
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# "CRYPTO_ARC4" = "y";
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# "CRYPTO_CBC" = "y";
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# "CRYPTO_CCM" = "y";
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# "CRYPTO_CMAC" = "y";
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# "CRYPTO_GCM" = "y";
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# "CRYPTO_HASH_INFO" = "y";
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# "CRYPTO_LIB_ARC4" = "y";
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# "CRYPTO_RSA" = "y";
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# "CRYPTO_SHA1" = "y";
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# "ENCRYPTED_KEYS" = "y";
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# "KEYS" = "y";
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};
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};
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outputs.default = "directory";
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boot = {
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loadAddress = "0x80060000";
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entryPoint = "0x80060000";
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};
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}
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