DP83TG721EVM-MC: DP83TG721EVM-MC Automotive Ethernet Setup - Link Up but no ping

Vignesh S

Part Number: DP83TG721EVM-MC
Other Parts Discussed in Thread: AM62A7,

We are working on AM62A7 based custom board with TJA1120A Auto Ethernet PHY.

We connected DP83TG721EVM-MC AutoEthernet to our Custom Board. Link was detected.

root@am62axx-evm:~# dmesg | grep eth
[    0.000000] psci: probing for conduit method from DT.
[    0.944429] optee: probing for conduit method.
[    1.352845] am65-cpsw-nuss 8000000.ethernet: initializing am65 cpsw nuss version 0x6BA01103, cpsw version 0x6BA81103 Ports: 3 quirks:00000006
[    1.365779] am65-cpsw-nuss 8000000.ethernet: Use random MAC address
[    1.452604] am65-cpsw-nuss 8000000.ethernet: initialized cpsw ale version 1.5
[    1.459737] am65-cpsw-nuss 8000000.ethernet: ALE Table size 512, Policers 32
[    1.467615] am65-cpsw-nuss 8000000.ethernet: CPTS ver 0x4e8a010c, freq:500000000, add_val:1 pps:1
[    1.488042] am65-cpsw-nuss 8000000.ethernet: set new flow-id-base 19
[    5.875382] am65-cpsw-nuss 8000000.ethernet eth1: PHY [8000f00.mdio:00] driver [Micrel KSZ9031 Gigabit PHY] (irq=POLL)
[    5.890378] am65-cpsw-nuss 8000000.ethernet eth1: configuring for phy/rgmii link mode
[    6.618291] am65-cpsw-nuss 8000000.ethernet eth0: PHY [8000f00.mdio:04] driver [NXP C45 TJA1120] (irq=POLL)
[    6.629693] am65-cpsw-nuss 8000000.ethernet eth0: configuring for phy/rgmii link mode
[    6.662963] am65-cpsw-nuss 8000000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
[   38.194116] am65-cpsw-nuss 8000000.ethernet eth0: Link is Down
[  116.023614] am65-cpsw-nuss 8000000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off

Right now Media Converter is set to Slave and TJA1120 to Master. Media Converter in Autonomous mode.

root@am62axx-evm:~# ethtool eth0
Settings for eth0:
        Supported ports: [ TP    MII ]
        Supported link modes:   1000baseT1/Full
        Supported pause frame use: Symmetric
        Supports auto-negotiation: No
        Supported FEC modes: Not reported
        Advertised link modes:  1000baseT1/Full
        Advertised pause frame use: Symmetric
        Advertised auto-negotiation: No
        Advertised FEC modes: Not reported
        Speed: 1000Mb/s
        Duplex: Full
        Auto-negotiation: off
        master-slave cfg: forced master
        master-slave status: master
        Port: Twisted Pair
        PHYAD: 4
        Transceiver: external
        MDI-X: Unknown
        Supports Wake-on: d
        Wake-on: d
        Current message level: 0x000020f7 (8439)
                               drv probe link ifdown ifup rx_err tx_err hw
        Link detected: yes
        SQI: 7/7

FYI eth0 is the Auto-Ethernet

But ping dosent work

acs@a-tract-10:~$ ping 192.168.1.100
PING 192.168.1.100 (192.168.1.100) 56(84) bytes of data.
From 192.168.1.101 icmp_seq=1 Destination Host Unreachable
From 192.168.1.101 icmp_seq=2 Destination Host Unreachable
From 192.168.1.101 icmp_seq=3 Destination Host Unreachable
From 192.168.1.101 icmp_seq=4 Destination Host Unreachable
From 192.168.1.101 icmp_seq=5 Destination Host Unreachable
From 192.168.1.101 icmp_seq=6 Destination Host Unreachable
^C
--- 192.168.1.100 ping statistics ---
8 packets transmitted, 0 received, +6 errors, 100% packet loss, time 7185ms
pipe 4

When i Ping from my laptop, i can see LEDs on my custom board blinking. But ping dosent succeed.

root@am62axx-evm:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 64:1C:10:1C:06:E2
          inet addr:192.168.1.100  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::661c:10ff:fe1c:6e2/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:84 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:16232 (15.8 KiB)

eth1      Link encap:Ethernet  HWaddr E2:F1:04:D8:68:19
          inet addr:192.168.2.100  Bcast:192.168.2.255  Mask:255.255.255.0
          inet6 addr: fe80::e0f1:4ff:fed8:6819/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:472 errors:0 dropped:0 overruns:0 frame:0
          TX packets:500 errors:0 dropped:6 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:44160 (43.1 KiB)  TX bytes:57756 (56.4 KiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:30 errors:0 dropped:0 overruns:0 frame:0
          TX packets:30 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:3262 (3.1 KiB)  TX bytes:3262 (3.1 KiB)

Kindly help us if anything more needs to be done since its Automotive ethernet and autonegotiation is not supported here.

1 month ago

0 Drew Miller1 1 month ago

TI__Mastermind 42748 points

Hi Vignesh,

A few things to check:

Verify that laptop is linked up with media converter at 1000Mbps.
Check packet counter registers on DP83TG721, 0x639-0x63E. This will indicate if PHY is receiving/transmitting packets and will also indicate if any FCS errors are detected.

Thanks,

Drew

0 Vignesh S 1 month ago in reply to Drew Miller1

Prodigy 30 points

Its working now, we just changed to RGMII-TXID for NXP TJA1120A. Pinging fine, no issues at all. We tested with 1Gbps speed on iperf3

But according to you 0x639 should increment,it dosent increment while Pinging from Board to PC

Just asking since you mentioned about this register

Thanks,

Vignesh

0 Drew Miller1 28 days ago in reply to Vignesh S

TI__Mastermind 42748 points

Hi Vignesh,

Could you try reading these registers in sequence? This should enable clearing the registers, which will give us a better perspective.

You can save below as txt file and load it as script for USB2MDIO.

begin

0639
063A
063B
063C
063D
063E

end

Thanks,

Drew

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DP83TG721EVM-MC: DP83TG721EVM-MC Automotive Ethernet Setup - Link Up but no ping