bmips: add experimental ethernet support

This adds experimental ethernet support for BCM6318, BCM6328, BCM6362, BCM6368
and BCM63268.
BCM6358 needs a different driver, so there's no support for now.

Working devices:
- Comtrend AR-5315u
- Comtrend AR-5387un
- Comtrend VR-3025u
- Comtrend VR-3032u

Not working devices:
- Netgear DGND3700 v2 (no idea on how the external switch is connected)
- Huawei HG556a ver B (BCM6358 needs a separate driveer)

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 93 insertions, 0 deletions

diff --git a/target/linux/bmips/dts/bcm6368.dtsi b/target/linux/bmips/dts/bcm6368.dtsi
index 5aa2b82221..5b5064b29e 100644
--- a/target/linux/bmips/dts/bcm6368.dtsi
+++ b/target/linux/bmips/dts/bcm6368.dtsi
@@ -467,6 +467,99 @@
 
 			resets = <&periph_rst BCM6368_RST_IPSEC>;
 		};
+
+		ethernet: ethernet@10006800 {
+			compatible = "brcm,bcm6368-enetsw";
+			reg = <0x10006800 0x80>,
+			      <0x10006a00 0x80>,
+			      <0x10006c00 0x80>;
+			reg-names = "dma",
+				    "dma-channels",
+				    "dma-sram";
+
+			interrupt-parent = <&periph_intc>;
+			interrupts = <BCM6368_IRQ_ENETSW_RX_DMA0>,
+				     <BCM6368_IRQ_ENETSW_TX_DMA0>;
+			interrupt-names = "rx",
+					  "tx";
+
+			clocks = <&periph_clk BCM6368_CLK_SWPKT_USB>,
+				 <&periph_clk BCM6368_CLK_SWPKT_SAR>,
+				 <&periph_clk BCM6368_CLK_ROBOSW>;
+
+			resets = <&periph_rst BCM6368_RST_SWITCH>,
+				 <&periph_rst BCM6368_RST_EPHY>;
+
+			dma-rx = <0>;
+			dma-tx = <1>;
+
+			status = "disabled";
+		};
+
+		switch0: switch@10f00000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "brcm,bcm6328-switch";
+			reg = <0x10f00000 0x8000>;
+			big-endian;
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@8 {
+					reg = <8>;
+					label = "cpu";
+
+					phy-mode = "internal";
+					ethernet = <&ethernet>;
+
+					fixed-link {
+						speed = <1000>;
+						full-duplex;
+					};
+				};
+			};
+		};
+
+		mdio: mdio@10f000b0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "brcm,bcm6368-mdio-mux";
+			reg = <0x10f000b0 0x8>;
+
+			mdio_int: mdio@0 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				reg = <0>;
+
+				phy1: ethernet-phy@1 {
+					compatible = "ethernet-phy-ieee802.3-c22";
+					reg = <1>;
+				};
+
+				phy2: ethernet-phy@2 {
+					compatible = "ethernet-phy-ieee802.3-c22";
+					reg = <2>;
+				};
+
+				phy3: ethernet-phy@3 {
+					compatible = "ethernet-phy-ieee802.3-c22";
+					reg = <3>;
+				};
+
+				phy4: ethernet-phy@4 {
+					compatible = "ethernet-phy-ieee802.3-c22";
+					reg = <4>;
+				};
+			};
+
+			mdio_ext: mdio@1 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				reg = <1>;
+			};
+		};
 	};
 
 	pflash: nor@18000000 {