linux: devicetree: Early experimental support for Ethernet switching with DSA

Author: CFSworks

tp2bmc/board/tp2bmc/boot.scr

@@ -20,7 +20,4 @@ load ${devtype} ${devnum}:${distro_bootpart} ${loadaddr} /boot/zImage
 load ${devtype} ${devnum}:${distro_bootpart} ${fdt_addr_r} /boot/${fdt_filename}
 fdt addr ${fdt_addr_r}
 
-# Our build of Linux doesn't yet know how to manage the switch, so:
-run ethsw_do_reset
-
 bootz ${loadaddr} - ${fdt_addr_r}

tp2bmc/board/tp2bmc/linux_defconfig

@@ -52,6 +52,9 @@ CONFIG_IP_MULTIPLE_TABLES=y
 CONFIG_INET_IPCOMP=y
 CONFIG_INET_UDP_DIAG=y
 CONFIG_IPV6_TUNNEL=y
+CONFIG_BRIDGE=y
+CONFIG_NET_DSA=y
+CONFIG_NET_DSA_TAG_RTL4_A=y
 CONFIG_NETLINK_DIAG=y
 CONFIG_UEVENT_HELPER=y
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
@@ -66,6 +69,9 @@ CONFIG_EEPROM_AT24=y
 CONFIG_SCSI=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_NETDEVICES=y
+CONFIG_NET_DSA_REALTEK=y
+# CONFIG_NET_DSA_REALTEK_MDIO is not set
+CONFIG_NET_DSA_REALTEK_RTL8365MB=y
 # CONFIG_NET_VENDOR_ALACRITECH is not set
 # CONFIG_NET_VENDOR_ALLWINNER is not set
 # CONFIG_NET_VENDOR_AMAZON is not set
@@ -114,7 +120,6 @@ CONFIG_STMMAC_ETH=y
 # CONFIG_NET_VENDOR_WANGXUN is not set
 # CONFIG_NET_VENDOR_WIZNET is not set
 # CONFIG_NET_VENDOR_XILINX is not set
-CONFIG_REALTEK_PHY=y
 # CONFIG_USB_NET_DRIVERS is not set
 # CONFIG_WLAN is not set
 CONFIG_INPUT_EVDEV=y

tp2bmc/board/tp2bmc/overlay/etc/init.d/S00dsa

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# Kind of a hack, don't know where else to put this
+# Rename `eth0` to `dsa` on boot, so that it is not confused for a usable
+# Ethernet interface
+
+case "$1" in
+    start|"")
+    	exec ip link set eth0 name dsa
+    	;;
+    *)
+        echo "Usage: $0 {start}"
+        exit 1
+        ;;
+esac

tp2bmc/board/tp2bmc/overlay/etc/network/interfaces

@@ -0,0 +1,11 @@
+# interface file auto-generated by buildroot
+
+auto lo
+iface lo inet loopback
+
+auto br0
+iface br0 inet dhcp
+  bridge-ports node1 node2 node3 node4 ge0 ge1
+  pre-up /etc/network/nfs_check
+  wait-delay 15
+  hostname $(hostname)

tp2bmc/board/tp2bmc/sun8i-t113s-turing-pi2-v2.4.dts

@@ -164,6 +164,10 @@
 	};
 };
 
+&ethernet_switch {
+		reset-gpios = <&pio 6 13 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+};
+
 &i2c2 {
 	/*
 	 * The TP2 board design includes a 4-pin fan header (J16) and

tp2bmc/board/tp2bmc/sun8i-t113s-turing-pi2-v2.5.dts

@@ -188,6 +188,10 @@
 	};
 };
 
+&ethernet_switch {
+		reset-gpios = <&pio 6 3 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+};
+
 &i2c0 {
 	status = "okay";
 

tp2bmc/board/tp2bmc/sun8i-t113s-turing-pi2.dtsi

@@ -218,6 +218,88 @@
 
 		pagesize = <16>;
 	};
+
+	ethernet_switch: ethernet-switch@5c {
+		compatible = "realtek,rtl8365mb";
+		reg = <0x5c>;
+
+		ethernet-ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			ethernet-port@0 {
+				reg = <0>;
+				label = "node1";
+				phy-handle = <&ethphy0>;
+				phy-mode = "internal";
+			};
+			ethernet-port@1 {
+				reg = <1>;
+				label = "node2";
+				phy-handle = <&ethphy1>;
+				phy-mode = "internal";
+			};
+			ethernet-port@2 {
+				reg = <2>;
+				label = "node3";
+				phy-handle = <&ethphy2>;
+				phy-mode = "internal";
+			};
+			ethernet-port@3 {
+				reg = <3>;
+				label = "node4";
+				phy-handle = <&ethphy3>;
+				phy-mode = "internal";
+			};
+			ethernet-port@4 {
+				reg = <4>;
+				label = "cpu";
+				ethernet = <&emac>;
+				phy-handle = <&ethphy4>;
+				phy-mode = "internal";
+			};
+			ethernet-port@5 {
+				reg = <5>;
+				label = "ge0";
+				phy-handle = <&ethphy5>;
+				phy-mode = "internal";
+			};
+			ethernet-port@6 {
+				reg = <6>;
+				label = "ge1";
+				phy-handle = <&ethphy6>;
+				phy-mode = "internal";
+			};
+		};
+
+		mdio {
+			compatible = "realtek,smi-mdio";
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			ethphy0: ethernet-phy@0 {
+				reg = <0>;
+			};
+			ethphy1: ethernet-phy@1 {
+				reg = <1>;
+			};
+			ethphy2: ethernet-phy@2 {
+				reg = <2>;
+			};
+			ethphy3: ethernet-phy@3 {
+				reg = <3>;
+			};
+			ethphy4: ethernet-phy@4 {
+				reg = <4>;
+			};
+			ethphy5: ethernet-phy@5 {
+				reg = <5>;
+			};
+			ethphy6: ethernet-phy@6 {
+				reg = <6>;
+			};
+		};
+	};
 };
 
 &emac {

tp2bmc/package/ifupdown-ng/ifupdown-ng.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 IFUPDOWN_NG_VERSION = 0.12.1
-IFUPDOWN_NG_SITE = $(call github,ifupdown-ng,ifupdown-ng,$(IFUPDOWN_NG_VERSION))
+IFUPDOWN_NG_SITE = $(call github,ifupdown-ng,ifupdown-ng,ifupdown-ng-$(IFUPDOWN_NG_VERSION))
 IFUPDOWN_NG_LICENSE = GPL-2.0+
 IFUPDOWN_NG_LICENSE_FILES = COPYING