DESK-MX8M-L/Peripherals/Ethernet

History
ID#	Issue Date	Notes
16714	21/06/2022	First DESK-MX8M-L release
17552	24/02/2023	DESK-MX8M-L-2.0.0 release
17552	26/07/2023	DESK-MX8M-L-4.0.0 release

Peripheral Ethernet

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

Device tree configuration

ORCA SOM

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
		>;
	};
...
...
};

MITO 8M Mini

Here below an example of device tree configuration used on standard DAVE's kit for the MITO 8M Mini SOM:

From imx8mm-mito8mmini.dts :

...
...
&fec1 {
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_fec1>, <&pinctrl_enet_reset>, <&pinctrl_enet_irq>;
	phy-mode = "rgmii-id";
	phy-handle = <&ethphy0>;
	fsl,magic-packet;
	status = "okay";

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

		ethphy0: ethernet-phy@7 {
			compatible = "ethernet-phy-ieee802.3-c22";
			txc-skew-ps = <1860>;
			txen-skew-ps = <0>;
			txd0-skew-ps = <0>;
			txd1-skew-ps = <0>;
			txd2-skew-ps = <0>;
			txd3-skew-ps = <0>;
			rxc-skew-ps = <1740>;
			reg = <7>;
		};
	};
};
...
...
&iomuxc {
...
...
	pinctrl_enet_irq: enet_irqgrp {
		fsl,pins = <
			MX8MM_IOMUXC_GPIO1_IO10_GPIO1_IO10				0x41   /* ETH0_INTn */
		>;
	};

	pinctrl_enet_reset: enet_resetgrp {
		fsl,pins = <
			MX8MM_IOMUXC_GPIO1_IO01_GPIO1_IO1			0x19	/* ETH0_RESETn */
		>;
	};

	pinctrl_fec1: fec1grp {
		fsl,pins = <
			MX8MM_IOMUXC_ENET_MDC_ENET1_MDC			0x3
			MX8MM_IOMUXC_ENET_MDIO_ENET1_MDIO		0x3
			MX8MM_IOMUXC_ENET_TD3_ENET1_RGMII_TD3		0x1f
			MX8MM_IOMUXC_ENET_TD2_ENET1_RGMII_TD2		0x1f
			MX8MM_IOMUXC_ENET_TD1_ENET1_RGMII_TD1		0x1f
			MX8MM_IOMUXC_ENET_TD0_ENET1_RGMII_TD0		0x1f
			MX8MM_IOMUXC_ENET_RD3_ENET1_RGMII_RD3		0x91
			MX8MM_IOMUXC_ENET_RD2_ENET1_RGMII_RD2		0x91
			MX8MM_IOMUXC_ENET_RD1_ENET1_RGMII_RD1		0x91
			MX8MM_IOMUXC_ENET_RD0_ENET1_RGMII_RD0		0x91
			MX8MM_IOMUXC_ENET_TXC_ENET1_RGMII_TXC		0x1f
			MX8MM_IOMUXC_ENET_RXC_ENET1_RGMII_RXC		0x91
			MX8MM_IOMUXC_ENET_RX_CTL_ENET1_RGMII_RX_CTL	0x91
			MX8MM_IOMUXC_ENET_TX_CTL_ENET1_RGMII_TX_CTL	0x1f
		>;
	};
...
...
};

Accessing the peripheral in ORCA SOM

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

Linux messages at boot time

• eth0

...
...
[    2.063873] fec 30be0000.ethernet eth0: registered PHC device 0
...
[   14.263053] Generic PHY 30be0000.ethernet-1:08: attached PHY driver (mii_bus:phy_addr=30be0000.ethernet-1:08, irq=POLL)

• eth1

[   14.249319] imx-dwmac 30bf0000.ethernet eth1: PHY [stmmac-1:07] driver [Microchip KSZ9131 Gigabit PHY] (irq=POLL)
[   14.250685] imx-dwmac 30bf0000.ethernet eth1: Register MEM_TYPE_PAGE_POOL RxQ-0
[   14.251110] imx-dwmac 30bf0000.ethernet eth1: No Safety Features support found
[   14.251133] imx-dwmac 30bf0000.ethernet eth1: IEEE 1588-2008 Advanced Timestamp supported
[   14.252851] imx-dwmac 30bf0000.ethernet eth1: registered PTP clock
[   14.255249] imx-dwmac 30bf0000.ethernet eth1: FPE workqueue start
[   14.255267] imx-dwmac 30bf0000.ethernet eth1: configuring for phy/rgmii-id link mode

Cable connection:

...
...
[   18.346266] fec 30be0000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
[   18.353884] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

Check the interface with ifconfig

root@desk-mx8mp:~# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.10.118  netmask 255.255.255.0  broadcast 192.168.10.255
        inet6 fe80::8449:5cff:fe4a:2840  prefixlen 64  scopeid 0x20<link>
        ether 86:49:5c:4a:28:40  txqueuelen 1000  (Ethernet)
        RX packets 56295  bytes 9105391 (8.6 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 225  bytes 23810 (23.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

root@desk-mx8mp:~# ifconfig eth1 
eth1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether b2:79:b4:e1:19:40  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 48

root@desk-mx8mp:~#

Test with iperf3

root@desk-mx8mp:~# iperf3 -t 5 -c 192.168.4.100
Connecting to host 192.168.4.100, port 5201
[  5] local 192.168.10.118 port 51394 connected to 192.168.4.100 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   114 MBytes   956 Mbits/sec    0    680 KBytes       
[  5]   1.00-2.00   sec   111 MBytes   933 Mbits/sec    0    771 KBytes       
[  5]   2.00-3.00   sec   112 MBytes   944 Mbits/sec    0    786 KBytes       
[  5]   3.00-4.00   sec   111 MBytes   933 Mbits/sec    0    829 KBytes       
[  5]   4.00-5.00   sec   111 MBytes   933 Mbits/sec    0    829 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-5.00   sec   560 MBytes   940 Mbits/sec    0             sender
[  5]   0.00-5.00   sec   558 MBytes   936 Mbits/sec                  receiver

iperf Done.
root@desk-mx8mp:~#

Accessing the peripheral in MITO 8M Mini

MIN SOM provides the network interface mapped as eth0.

Linux messages at boot time

...
[    2.909811] fec 30be0000.ethernet eth0: registered PHC device 0
...
[   16.285429] Micrel KSZ9031 Gigabit PHY 30be0000.ethernet-1:07: attached PHY driver (mii_bus:phy_addr=30be0000.ethernet-1:07, irq=POLL)
...

Cable connection:

...
[   20.386519] fec 30be0000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[   20.394322] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
...

Check the interface with ifconfig

root@desk-mx8mm:~# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.4.153  netmask 255.255.255.0  broadcast 192.168.4.255
        inet6 fe80::80c9:10ff:fe49:b0ee  prefixlen 64  scopeid 0x20<link>
        ether 82:c9:10:49:b0:ee  txqueuelen 1000  (Ethernet)
        RX packets 65495  bytes 4562086 (4.3 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 558  bytes 134716 (131.5 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

root@desk-mx8mm:~# 

Test with iperf3

root@desk-mx8mm:~# iperf3 -t 5 -c 192.168.4.100
Connecting to host 192.168.4.100, port 5201
[  5] local 192.168.4.153 port 50938 connected to 192.168.4.100 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   113 MBytes   951 Mbits/sec    0    457 KBytes       
[  5]   1.00-2.00   sec   112 MBytes   941 Mbits/sec    0    499 KBytes       
[  5]   2.00-3.00   sec   113 MBytes   948 Mbits/sec    0    525 KBytes       
[  5]   3.00-4.00   sec   112 MBytes   941 Mbits/sec    0    525 KBytes       
[  5]   4.00-5.00   sec   112 MBytes   939 Mbits/sec    0    525 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-5.00   sec   563 MBytes   944 Mbits/sec    0             sender
[  5]   0.00-5.00   sec   560 MBytes   939 Mbits/sec                  receiver

iperf Done.
root@desk-mx8mm:~# 

MAC Address

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

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