AM6412: PHY does not work with 10Mbs on SDK 08.04.01.04

Hi,

Could you please describe the PHY mode that you are using? 

Could you please attach the results of ethtool eth0?

Best Regards,

Schuyler

Hi Schuyler,

PHY does not work at 10M speed.

• 1000M speed is fine.

root@am64xx-evm:~# ethtool eth0 | grep Speed
Speed: 1000Mb/s

root@am64xx-evm:~# ping 10.123.8.132
PING 10.123.8.132 (10.123.8.132): 56 data bytes
64 bytes from 10.123.8.132: seq=0 ttl=64 time=1.102 ms
64 bytes from 10.123.8.132: seq=1 ttl=64 time=0.636 ms

• 100M speed is fine.

root@am64xx-evm:~# ethtool -s eth0 speed 100 duplex full autoneg off
root@am64xx-evm:~# ifconfig eth0 up[ 466.806172] am65-cpsw-nuss 8000000.ethernet eth0: Link is Up - 100Mbps/Full - flow control off

root@am64xx-evm:~# ethtool eth0 | grep Speed
Speed: 100Mb/s
root@am64xx-evm:~# ifconfig eth0 | grep RUNNING
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 metric 1

root@am64xx-evm:~# ping 10.123.8.132
PING 10.123.8.132 (10.123.8.132): 56 data bytes
64 bytes from 10.123.8.132: seq=0 ttl=64 time=0.831 ms
64 bytes from 10.123.8.132: seq=1 ttl=64 time=0.790 ms

• 10M speed is not available.

root@am64xx-evm:~# ethtool -s eth0 speed 10 duplex full autoneg off
root@am64xx-evm:~# [ 603.523558] am65-cpsw-nuss 8000000.ethernet eth0: Link is Down
[ 606.581217] am65-cpsw-nuss 8000000.ethernet eth0: Link is Up - 10Mbps/Full - flow control off

root@am64xx-evm:~# ethtool eth0 | grep Speed
Speed: 10Mb/s
root@am64xx-evm:~# ifconfig eth0 | grep RUNNING
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 metric 1

root@am64xx-evm:~# ping 10.123.8.132
PING 10.123.8.132 (10.123.8.132): 56 data bytes
^C
--- 10.123.8.132 ping statistics ---
6 packets transmitted, 0 packets received, 100% packet loss
root@am64xx-evm:~# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 metric 1
inet 10.123.8.139 netmask 255.0.0.0 broadcast 10.255.255.255
inet6 fe80::3608:e1ff:fe80:af37 prefixlen 64 scopeid 0x20<link>
ether 34:08:e1:80:af:37 txqueuelen 1000 (Ethernet)
RX packets 355 bytes 26949 (26.3 KiB)
RX errors 0 dropped 99 overruns 0 frame 0
TX packets 230 bytes 19350 (18.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

root@am64xx-evm:~#

root@am64xx-evm:~# ethtool eth0
Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: Symmetric
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: No
Advertised FEC modes: Not reported
Speed: 10Mb/s
Duplex: Full
Auto-negotiation: off
master-slave cfg: preferred slave
master-slave status: slave
Port: Twisted Pair
PHYAD: 0
Transceiver: external
MDI-X: Unknown
Supports Wake-on: ubgs
Wake-on: d
SecureOn password: 00:00:00:00:00:00
Current message level: 0x000020f7 (8439)
drv probe link ifdown ifup rx_err tx_err hw
Link detected: yes
root@am64xx-evm:~#

Thanks,

Sean

In addition, both SDK-LINUX-AM64X and SDK-LINUX-RT-AM64X have the same problem on 10M full-duplex and half-duplex.