DESK-MX8M-L/Peripherals/Ethernet

History
Version	Issue Date	Notes
1.0.0	Jan 2022	First DESK-MX8M release

Contents

Peripheral EthernetEdit

The ethernet interface is made available through the i.MX8M fec interface which should be initialized on the device tree.

Device tree configurationEdit

Here below an example of device tree configuration used on standard DAVE's kit for the ORCA SOM:

From imx8mp-mito8mplus-cb1001.dts :

&fec {
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_fec>;
	phy-mode = "rgmii-id";
	phy-handle = <&ethphy1>;
	fsl,magic-packet;
	status = "okay";

	mdio {
		#address-cells = <1>;
		#size-cells = <0>;

		ethphy1: ethernet-phy@8 {
			compatible = "ethernet-phy-ieee802.3-c22";
			reg = <8>;
			eee-broken-1000t;
			eee-broken-100tx;
		};
	};
};

From imx8mp-mito8mplus.dtsi :

&eqos {
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_eqos>;
	phy-mode = "rgmii-id";
	phy-handle = <&ethphy0>;
	status = "okay";

	mdio {
		compatible = "snps,dwmac-mdio";
		#address-cells = <1>;
		#size-cells = <0>;

		ethphy0: ethernet-phy@7 {
			compatible = "ethernet-phy-ieee802.3-c22";
			reg = <7>;
			eee-broken-1000t;
			eee-broken-100tx;
		};
	};
};
...
...

&iomuxc {
...
...
	pinctrl_eqos: eqosgrp {
		fsl,pins = <
			MX8MP_IOMUXC_ENET_MDC__ENET_QOS_MDC		0x3
			MX8MP_IOMUXC_ENET_MDIO__ENET_QOS_MDIO		0x3
			MX8MP_IOMUXC_ENET_RD0__ENET_QOS_RGMII_RD0	0x91
			MX8MP_IOMUXC_ENET_RD1__ENET_QOS_RGMII_RD1	0x91
			MX8MP_IOMUXC_ENET_RD2__ENET_QOS_RGMII_RD2	0x91
			MX8MP_IOMUXC_ENET_RD3__ENET_QOS_RGMII_RD3	0x91
			MX8MP_IOMUXC_ENET_RXC__CCM_ENET_QOS_CLOCK_GENERATE_RX_CLK	0x91
			MX8MP_IOMUXC_ENET_RX_CTL__ENET_QOS_RGMII_RX_CTL	0x91
			MX8MP_IOMUXC_ENET_TD0__ENET_QOS_RGMII_TD0	0x1f
			MX8MP_IOMUXC_ENET_TD1__ENET_QOS_RGMII_TD1	0x1f
			MX8MP_IOMUXC_ENET_TD2__ENET_QOS_RGMII_TD2	0x1f
			MX8MP_IOMUXC_ENET_TD3__ENET_QOS_RGMII_TD3	0x1f
			MX8MP_IOMUXC_ENET_TX_CTL__ENET_QOS_RGMII_TX_CTL	0x1f
			MX8MP_IOMUXC_ENET_TXC__CCM_ENET_QOS_CLOCK_GENERATE_TX_CLK	0x1f
			MX8MP_IOMUXC_GPIO1_IO10__GPIO1_IO10		0x19
		>;
	};

	pinctrl_fec: fecgrp {
		fsl,pins = <
			MX8MP_IOMUXC_SAI1_RXD2__ENET1_MDC		0x3
			MX8MP_IOMUXC_SAI1_RXD3__ENET1_MDIO		0x3
			MX8MP_IOMUXC_SAI1_RXD4__ENET1_RGMII_RD0		0x91
			MX8MP_IOMUXC_SAI1_RXD5__ENET1_RGMII_RD1		0x91
			MX8MP_IOMUXC_SAI1_RXD6__ENET1_RGMII_RD2		0x91
			MX8MP_IOMUXC_SAI1_RXD7__ENET1_RGMII_RD3		0x91
			MX8MP_IOMUXC_SAI1_TXC__ENET1_RGMII_RXC		0x91
			MX8MP_IOMUXC_SAI1_TXFS__ENET1_RGMII_RX_CTL	0x91
			MX8MP_IOMUXC_SAI1_TXD0__ENET1_RGMII_TD0		0x1f
			MX8MP_IOMUXC_SAI1_TXD1__ENET1_RGMII_TD1		0x1f
			MX8MP_IOMUXC_SAI1_TXD2__ENET1_RGMII_TD2		0x1f
			MX8MP_IOMUXC_SAI1_TXD3__ENET1_RGMII_TD3		0x1f
			MX8MP_IOMUXC_SAI1_TXD4__ENET1_RGMII_TX_CTL	0x1f
			MX8MP_IOMUXC_SAI1_TXD5__ENET1_RGMII_TXC		0x1f
			MX8MP_IOMUXC_SAI1_RXD0__GPIO4_IO02		0x19
		>;
	};
...
...
};

Accessing the peripheralEdit

ORCA SOM provides the network interface mapped as eth0 and eth1.

Linux messages at boot timeEdit

• eth0

...
...
[    2.253084] fec 30be0000.ethernet eth0: registered PHC device 0
...
[    6.211939] Generic PHY 30be0000.ethernet-1:08: attached PHY driver [Generic PHY] (mii_bus:phy_addr=30be0000.ethernet-1:08, irq=POLL)

• eth1

[    6.139981] imx-dwmac 30bf0000.ethernet eth1: PHY [stmmac-1:07] driver [Microchip KSZ9131 Gigabit PHY]
[    6.162868] imx-dwmac 30bf0000.ethernet eth1: No Safety Features support found
[    6.170459] imx-dwmac 30bf0000.ethernet eth1: IEEE 1588-2008 Advanced Timestamp supported
[    6.181622] imx-dwmac 30bf0000.ethernet eth1: registered PTP clock
[    6.187870] imx-dwmac 30bf0000.ethernet eth1: configuring for phy/rgmii-id link mode

Cable connection:

...
...
[   10.422034] fec 30be0000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
[   10.429651] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

Check the interface with ifconfigEdit

root@desk-mx8mp:~# ifconfig eth0
eth0      Link encap:Ethernet  HWaddr f2:b3:2f:ee:0c:69
          inet6 addr: fe80::f0b3:2fff:feee:c69/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:16657 errors:0 dropped:0 overruns:0 frame:0
          TX packets:109 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1806277 (1.7 MiB)  TX bytes:19191 (18.7 KiB)

root@desk-mx8mp:~# ifconfig eth1
eth1      Link encap:Ethernet  HWaddr 2e:89:64:91:78:a6
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:45

root@desk-mx8mp:~#

Test with iperf3Edit

root@desk-mx8mp:~#  iperf3 -t 5 -c 192.168.0.125
Connecting to host 192.168.0.125, port 5201
[  5] local 192.168.0.146 port 56130 connected to 192.168.0.131 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   114 MBytes   954 Mbits/sec    0    385 KBytes
[  5]   1.00-2.00   sec   113 MBytes   945 Mbits/sec    0    385 KBytes
[  5]   2.00-3.00   sec   112 MBytes   938 Mbits/sec    0    403 KBytes
[  5]   3.00-4.00   sec   112 MBytes   940 Mbits/sec    0    423 KBytes
[  5]   4.00-5.00   sec   112 MBytes   941 Mbits/sec    0    423 KBytes
[  5]   5.00-6.00   sec   113 MBytes   945 Mbits/sec    0    423 KBytes
[  5]   6.00-7.00   sec   112 MBytes   940 Mbits/sec    0    423 KBytes
[  5]   7.00-8.00   sec   112 MBytes   941 Mbits/sec    0    465 KBytes
[  5]   8.00-9.00   sec   112 MBytes   943 Mbits/sec    0    465 KBytes
[  5]   9.00-10.00  sec   112 MBytes   938 Mbits/sec    0    465 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.10 GBytes   943 Mbits/sec    0             sender
[  5]   0.00-10.00  sec  1.10 GBytes   941 Mbits/sec                  receiver

iperf Done.
root@desk-mx8mp:~#

MAC AddressEdit

For the MAC Address programming, refers to the following wiki page

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