lantiq: add Netgear DM200 support

Netgear DM200 is an inexpensive VDSL modem:

    CPU: VRX220 MIPS 34Kc 5.6 @ 500Mhz
    RAM: 64MiB
    Flash: 8MiB
    Ethernet: 1x100M
    DSL: VDSL2+, ADSL2+
    reset button, 3x bi-color LEDs

Serial port is 115200 baud, on the 4 pin header; pins from the bottom to
top are GND, RX, TX.

To upgrade from the vendor firmware, upload factory.img

The DM200 bootloader supports flashing over TFTP; hold the reset button
while powering on the device, and wait for the power light to start
flashing green before releasing. The device is now listening on
192.168.0.1/24, and can be sent a factory.img or a netgear image with a
TFTP put.

Once the image is loaded, it will be written to the flash, and the
device will reboot; this will take a few minutes.

Thanks to Edward O'Callaghan and Baptiste Jonglez, who implemented their
own ports for this device and provided valuable feedback.

Signed-off-by: Thomas Nixon <tom@tomn.co.uk>

target/linux/lantiq/base-files/etc/board.d/01_leds

@@ -50,6 +50,9 @@ ARV7519RW22)
 BTHOMEHUBV5A)
 	ucidef_set_led_default "dimmed" "dimmed" "dimmed" "0"
 	;;
+DM200)
+	ucidef_set_led_netdev "lan" "lan" "dm200:green:lan" "eth0"
+	;;
 FRITZ7320)
 	ucidef_set_led_netdev "wifi" "wifi" "fritz7320:green:wlan" "wlan0"
 	;;

target/linux/lantiq/base-files/etc/board.d/02_network

@@ -100,6 +100,12 @@ DGN3500*)
 		"0:lan:4" "1:lan:3" "2:lan:2" "3:lan:1" "5t@eth0"
 	;;
 
+DM200)
+	lan_mac=$(mtd_get_mac_binary ART 0)
+	wan_mac=$(macaddr_add "$lan_mac" 1)
+	ucidef_set_interface_lan 'eth0'
+	;;
+
 EASY80920NAND|EASY80920NOR)
 	lan_mac=$(mtd_get_mac_ascii uboot_env ethaddr)
 	wan_mac=$(macaddr_add "$lan_mac" 1)

target/linux/lantiq/dts/DM200.dts

@@ -0,0 +1,214 @@
+/dts-v1/;
+
+#include "vr9.dtsi"
+
+#include <dt-bindings/input/input.h>
+
+/ {
+	model = "DM200 - Netgear DM200";
+
+	chosen {
+		bootargs = "console=ttyLTQ0,115200";
+	};
+
+	aliases {
+		led-boot = &power_green;
+		led-failsafe = &power_amber;
+		led-running = &power_green;
+
+		led-dsl = &dsl_green;
+	};
+
+	memory@0 {
+		reg = <0x0 0x4000000>;
+	};
+
+	fpi@10000000 {
+		gpio: pinmux@E100B10 {
+			pinctrl-names = "default";
+			pinctrl-0 = <&state_default>;
+
+			state_default: pinmux {
+				mdio {
+					lantiq,groups = "mdio";
+					lantiq,function = "mdio";
+				};
+			};
+
+			pins_spi_default: pins_spi_default {
+				spi_in {
+					lantiq,groups = "spi_di";
+					lantiq,function = "spi";
+				};
+				spi_out {
+					lantiq,groups = "spi_do", "spi_clk", "spi_cs4";
+					lantiq,function = "spi";
+					lantiq,output = <1>;
+				};
+			};
+		};
+
+		pcie@d900000 {
+			status = "disabled";
+		};
+	};
+
+	gphy-xrx200 {
+		compatible = "lantiq,phy-xrx200";
+		firmware = "lantiq/vr9_phy22f_a2x.bin";
+		phys = [ 01 ];
+	};
+
+	gpio-keys-polled {
+		compatible = "gpio-keys-polled";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		poll-interval = <100>;
+		reset {
+			label = "reset";
+			gpios = <&gpio 7 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+	};
+
+	gpio_export {
+		compatible = "gpio-export";
+		#size-cells = <0>;
+
+		annexa {
+			gpio-export,name = "annexa";
+			gpio-export,output = <0>;
+			gpios = <&gpio 12 GPIO_ACTIVE_HIGH>;
+		};
+		annexb {
+			gpio-export,name = "annexb";
+			gpio-export,output = <0>;
+			gpios = <&gpio 15 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		power_amber: power_amber {
+			label = "dm200:amber:power";
+			gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
+		};
+		power_green: power_green {
+			label = "dm200:green:power";
+			gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
+		};
+
+		lan_amber {
+			label = "dm200:amber:lan";
+			gpios = <&gpio 33 GPIO_ACTIVE_HIGH>;
+		};
+		lan_green {
+			label = "dm200:green:lan";
+			gpios = <&gpio 11 GPIO_ACTIVE_HIGH>;
+		};
+
+		dsl_amber {
+			label = "dm200:amber:dsl";
+			gpios = <&gpio 8 GPIO_ACTIVE_HIGH>;
+		};
+		dsl_green: dsl_green {
+			label = "dm200:green:dsl";
+			gpios = <&gpio 36 GPIO_ACTIVE_HIGH>;
+		};
+	};
+};
+
+&spi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pins_spi_default>;
+
+	status = "ok";
+
+	m25p80@4 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "jedec,spi-nor";
+		reg = <4 0>;
+		spi-max-frequency = <10000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				reg = <0x0 0x20000>;
+				label = "uboot";
+				read-only;
+			};
+
+			partition@20000 {
+				reg = <0x20000 0x10000>;
+				label = "gphyfirmware";
+				read-only;
+			};
+
+			partition@30000 {
+				reg = <0x30000 0x7b0000>;
+				label = "firmware";
+			};
+
+			partition@7e0000 {
+				reg = <0x7e0000 0x10000>;
+				label = "sysconfig";
+				read-only;
+			};
+
+			partition@7f0000 {
+				reg = <0x7f0000 0x2000>;
+				label = "ubootconfig";
+				read-only;
+			};
+
+			partition@7f2000 {
+				reg = <0x7f2000 0x1000>;
+				label = "ART";
+				read-only;
+			};
+
+			partition@7f3000 {
+				reg = <0x7f3000 0x1000>;
+				label = "pot";
+				read-only;
+			};
+
+			partition@7f4000 {
+				reg = <0x7f4000 0xc000>;
+				label = "ret";
+				read-only;
+			};
+		};
+	};
+};
+
+&eth0 {
+	lan: interface@0 {
+		compatible = "lantiq,xrx200-pdi";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <0>;
+
+		ethernet@4 {
+			compatible = "lantiq,xrx200-pdi-port";
+			reg = <4>;
+			phy-mode = "mii";
+			phy-handle = <&phy13>;
+		};
+	};
+
+	mdio@0 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "lantiq,xrx200-mdio";
+		phy13: ethernet-phy@13 {
+			reg = <0x13>;
+			compatible = "lantiq,phy22f", "ethernet-phy-ieee802.3-c22";
+		};
+	};
+};

target/linux/lantiq/image/Makefile

@@ -513,6 +513,17 @@ define Device/BTHOMEHUBV5A
 endef
 TARGET_DEVICES += BTHOMEHUBV5A
 
+define Device/DM200
+  IMAGES := sysupgrade.bin factory.img
+  IMAGE/factory.img := $$(IMAGE/sysupgrade.bin) | netgear-dni
+  IMAGE_SIZE := 7872k
+  DEVICE_TITLE := Netgear DM200
+  NETGEAR_BOARD_ID := DM200
+  NETGEAR_HW_ID := 29765233+8+0+64+0+0
+endef
+DEVICE_VARS += NETGEAR_BOARD_ID NETGEAR_HW_ID
+TARGET_DEVICES += DM200
+
 define Device/EASY80920NAND
   $(Device/lantiqFullImage)
   IMAGE_SIZE := 64512k