NetBSD Problem Report #60193

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Date: Thu, 16 Apr 2026 06:46:51 +0000 (UTC)
From: nia@pkgsrc.org
Reply-To: nia@pkgsrc.org
To: gnats-bugs@NetBSD.org
Subject: olimex a64 - no carrier with emac0 ethernet
X-Send-Pr-Version: www-1.0
X-From4GNATS: "nia@pkgsrc.org via gnats" <gnats-admin@NetBSD.org>

>Number:         60193
>Category:       port-arm
>Synopsis:       olimex a64 - no carrier with emac0 ethernet
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-arm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Apr 16 06:50:00 +0000 2026
>Last-Modified:  Thu May 07 14:00:01 +0000 2026
>Originator:     nia
>Release:        
>Organization:
The NoNetBSD Foundation
>Environment:
NetBSD arm64 11.99.5 NetBSD 11.99.5 (GENERIC64) #0: Wed Apr 15 16:10:35 UTC 2026  mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/evbarm/compile/GENERIC64 evbarm
>Description:
The device is never able to get a carrier, but is fully functional on
Olimex's official Linux image.

Starting dhcpcd.
dhcpcd-10.3.1 starting
DUID 00:01:blah
emac0: waiting for carrier
emac0: carrier acquired
emac0: IAID aa:blah
emac0: adding address fe80::d7a0:425e:74e4:eb0e
emac0: carrier lost - roaming
timed out

$ ifconfig
emac0: flags=0x8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        capabilities=0x3f00<IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx,TCP4CSUM_Tx>
        capabilities=0x3f00<UDP4CSUM_Rx,UDP4CSUM_Tx>
        enabled=0
        ec_capabilities=0x1<VLAN_MTU>
        ec_enabled=0
        address: 02:ba:xx:xx:xx:xx
        media: Ethernet autoselect (none)
        status: no carrier
        inet6 fe80::d7a0:425e:74e4:eb0e%emac0/64 flags 0x8<DETACHED> scopeid 0x

[     1.000004] emac0 at simplebus1: EMAC
[     1.000004] emac0: Ethernet address 02:ba:xx:xx:xx:xx
[     1.000004] emac0: interrupting on GIC irq 114
[     1.000004] ukphy0 at emac0 phy 1: OUI 0x0010a1, model 0x0022, rev. 2

Full dmesg for the board: https://dmesgd.nycbug.org/dmesgd?do=view&id=8914
>How-To-Repeat:
try to wait for dhcpcd, leave disappointed
>Fix:
might be a problem with the device tree

as temporary solution, attach axe0 over USB

>Audit-Trail:
From: Manuel Bouyer <bouyer@antioche.eu.org>
To: gnats-bugs@netbsd.org
Cc: port-arm-maintainer@netbsd.org, gnats-admin@netbsd.org,
        netbsd-bugs@netbsd.org
Subject: Re: port-arm/60193: olimex a64 - no carrier with emac0 ethernet
Date: Fri, 17 Apr 2026 12:50:20 +0200

 On Thu, Apr 16, 2026 at 06:50:01AM +0000, nia@pkgsrc.org via gnats wrote:
 > NetBSD arm64 11.99.5 NetBSD 11.99.5 (GENERIC64) #0: Wed Apr 15 16:10:35 UTC 2026  mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/evbarm/compile/GENERIC64 evbarm
 > >Description:
 > The device is never able to get a carrier, but is fully functional on
 > Olimex's official Linux image.
 > 
 > Starting dhcpcd.
 > dhcpcd-10.3.1 starting
 > DUID 00:01:blah
 > emac0: waiting for carrier
 > emac0: carrier acquired
 > emac0: IAID aa:blah
 > emac0: adding address fe80::d7a0:425e:74e4:eb0e
 > emac0: carrier lost - roaming
 > timed out

 > $ ifconfig
 > emac0: flags=0x8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
 >         capabilities=0x3f00<IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx,TCP4CSUM_Tx>
 >         capabilities=0x3f00<UDP4CSUM_Rx,UDP4CSUM_Tx>
 >         enabled=0
 >         ec_capabilities=0x1<VLAN_MTU>
 >         ec_enabled=0
 >         address: 02:ba:xx:xx:xx:xx
 >         media: Ethernet autoselect (none)
 >         status: no carrier
 >         inet6 fe80::d7a0:425e:74e4:eb0e%emac0/64 flags 0x8<DETACHED> scopeid 0x

 FWIW, I see the same issue with NetBSD 10.0.
 At boot the media is properly detected, but bringing the interface up causes
 it to loose the media:
 # ifconfig
 emac0: flags=0x8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
         capabilities=0x3f00<IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx,TCP4CSUM_Tx>
         capabilities=0x3f00<UDP4CSUM_Rx,UDP4CSUM_Tx>
         enabled=0
         ec_capabilities=0x1<VLAN_MTU>
         ec_enabled=0
         address: 02:ba:a8:c8:fe:86
         media: Ethernet autoselect (1000baseT full-duplex)
         status: active
 lo0: flags=0x8048<LOOPBACK,RUNNING,MULTICAST> mtu 33624
         status: active
 # ifconfig emac0 up
 # ifconfig         
 emac0: flags=0x8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
         capabilities=0x3f00<IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx,TCP4CSUM_Tx>
         capabilities=0x3f00<UDP4CSUM_Rx,UDP4CSUM_Tx>
         enabled=0
         ec_capabilities=0x1<VLAN_MTU>
         ec_enabled=0
         address: 02:ba:a8:c8:fe:86
         media: Ethernet autoselect (none)
         status: no carrier
         inet6 fe80::ba:a8ff:fec8:fe86%emac0/64 flags 0x8<DETACHED> scopeid 0x1
 lo0: flags=0x8048<LOOPBACK,RUNNING,MULTICAST> mtu 33624
         status: active

 -- 
 Manuel Bouyer <bouyer@antioche.eu.org>
      NetBSD: 26 ans d'experience feront toujours la difference
 --

From: "Nia Alarie" <nia@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/60193 CVS commit: src/sys/dev/mii
Date: Tue, 21 Apr 2026 15:57:51 +0000

 Module Name:	src
 Committed By:	nia
 Date:		Tue Apr 21 15:57:51 UTC 2026

 Modified Files:
 	src/sys/dev/mii: micphy.c

 Log Message:
 micphy: Apply errata workaround for KSZ9031

 This fixes ethernet on an olimex a64 board, and should be pulled up
 to -11, -10, -9...

 Thanks jmcneill for pointing out the problem.

 PR port-arm/60193: olimex a64 - no carrier with emac0 ethernet


 To generate a diff of this commit:
 cvs rdiff -u -r1.15 -r1.16 src/sys/dev/mii/micphy.c

 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

From: "Martin Husemann" <martin@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/60193 CVS commit: [netbsd-11] src/sys
Date: Thu, 7 May 2026 13:46:47 +0000

 Module Name:	src
 Committed By:	martin
 Date:		Thu May  7 13:46:47 UTC 2026

 Modified Files:
 	src/sys/arch/evbarm/conf [netbsd-11]: GENERIC64
 	src/sys/dev/mii [netbsd-11]: micphy.c

 Log Message:
 Pull up following revision(s) (requested by nia in ticket #260):

 	sys/arch/evbarm/conf/GENERIC64: revision 1.232
 	sys/dev/mii/micphy.c: revision 1.16
 	sys/dev/mii/micphy.c: revision 1.17

 Add micphy for Micrel KSZ[89]xxx PHY support
 micphy: Apply errata workaround for KSZ9031

 This fixes ethernet on an olimex a64 board.
 Thanks jmcneill for pointing out the problem.

 PR port-arm/60193: olimex a64 - no carrier with emac0 ethernet
 micphy: Fill out mii_mpd_model in the sc struct.

 The rest of the code expects this to be filled in and the driver
 seems stable with this change (at least on my machine).
 "ship it!" jmcneill@


 To generate a diff of this commit:
 cvs rdiff -u -r1.226.2.1 -r1.226.2.2 src/sys/arch/evbarm/conf/GENERIC64
 cvs rdiff -u -r1.15 -r1.15.10.1 src/sys/dev/mii/micphy.c

 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

From: "Martin Husemann" <martin@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/60193 CVS commit: [netbsd-10] src/sys
Date: Thu, 7 May 2026 13:55:44 +0000

 Module Name:	src
 Committed By:	martin
 Date:		Thu May  7 13:55:44 UTC 2026

 Modified Files:
 	src/sys/arch/evbarm/conf [netbsd-10]: GENERIC64
 	src/sys/dev/mii [netbsd-10]: micphy.c

 Log Message:
 Pull up following revision(s) (requested by nia in ticket #1257):

 	sys/arch/evbarm/conf/GENERIC64: revision 1.232
 	sys/dev/mii/micphy.c: revision 1.16
 	sys/dev/mii/micphy.c: revision 1.17

 Add micphy for Micrel KSZ[89]xxx PHY support
 micphy: Apply errata workaround for KSZ9031

 This fixes ethernet on an olimex a64 board.
 Thanks jmcneill for pointing out the problem.

 PR port-arm/60193: olimex a64 - no carrier with emac0 ethernet
 micphy: Fill out mii_mpd_model in the sc struct.

 The rest of the code expects this to be filled in and the driver
 seems stable with this change (at least on my machine).
 "ship it!" jmcneill@


 To generate a diff of this commit:
 cvs rdiff -u -r1.206.2.6 -r1.206.2.7 src/sys/arch/evbarm/conf/GENERIC64
 cvs rdiff -u -r1.15 -r1.15.2.1 src/sys/dev/mii/micphy.c

 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

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