Mpc875 Ethernet does not work under linux.
From: Cem Vedat ISIK <hidden>
Date: 2007-02-08 10:00:36
Hi all,
Sorry for duplicate posting, since I'm not sure about the topic.
I'm having a problem using ethernet with denx-provided kernel:
linuxppc_2_4_devel-2006-04-06-1735 on mpc875 (a member of mpc885 family).
Ethernet just works (tftpboot and ping are functional) under U-Boot
1.1.6 with mpc875. U-Boot boots with tftpboot, kernel starts (seems
correct-with no error messages) and ifconfig displays,
~ $ ifconfig
eth0 Link encap:Ethernet HWaddr 00:08:D1:02:06:00
inet addr:192.168.2.135 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5540 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:1 dropped:0 overruns:0 carrier:1
collisions:0 txqueuelen:1000
RX bytes:583298 (569.6 KiB) TX bytes:42 (42.0 B)
Base address:0xe00
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 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:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
$
where, the MAC addr is same as in U-Boot ( U-Boot correctly hands the
mac addr to linux kernel).
The mpc875 is situated on a daughter card, plugged onto the main board,
that contains a single phy (lxt972a). We already have a mpc852 based
daughter board which only has a single MII interface that works with the
mainboard hardware and with linuxppc_2_4_devel-2006-04-06-1735 kernel. I
mean, the difference is only the cpu type. The same mainboard/kernel
configuration for mpc852 works fine.
For some real-time patches and considerations, I have to use 2.4.25
kernel (linuxppc_2_4_devel-2006-04-06-1735). Therefore, need an idea on
using ethernet with this kernel.
Despite identifying the eth0 correctly ( which pings itself and
127.0.0.1 ), ping (and wget also) does not work, not only in pinging out
but also in replying pings.
(Pinging PC, from mpc875)
~ $ ping 192.168.2.108
No response from 192.168.2.108
~ $
Pinging the other way around (mpc875 from PC), I get "Destination
Unreachable", that is,
root@cem-kubuntu:/opt/kernel# ping 192.168.2.135
PING 192.168.2.135 (192.168.2.135) 56(84) bytes of data.From 192.168.2.108 icmp_seq=1 Destination Host Unreachable
root@cem-kubuntu:/opt/kernel# At this time, on the serial console of mpc875 I get, ~ $ NETDEV WATCHDOG: eth0: transmit timed out eth0: transmit timed out. Ring data dump: cur_tx c3070108, tx_free 0, dirty_tx c3070108, cur_rx c3070018 tx: 16 buffers c3070100: 9c00 002a 00eb9aa2 c3070108: 9c00 002a 00eb9322 c3070110: 9c00 002a 00eb93a2 c3070118: 9c00 002a 00eb9422 c3070120: 9c00 002a 00eb94a2 c3070128: 9c00 002a 00eb9522 c3070130: 9c00 002a 00eb95a2 c3070138: 9c00 002a 00eb9622 c3070140: 9c00 002a 00eb96a2 c3070148: 9c00 002a 00eb9722 c3070150: 9c00 002a 00eb97a2 c3070158: 9c00 002a 00eb9822 c3070160: 9c00 002a 00eb98a2 c3070168: 9c00 002a 00eb9922 c3070170: 9c00 002a 00eb99a2 c3070178: bc00 002a 00eb9a22 rx: 32 buffers c3070000: 8880 0072 0025c000 c3070008: 8880 0040 0025c800 c3070010: 8880 0040 0025b000 c3070018: 8880 0072 0025b800 c3070020: 8880 0060 0025a000 c3070028: 8880 0140 0025a800 c3070030: 8880 0072 00259000 c3070038: 8880 0040 00259800 c3070040: 8880 0072 00258000 c3070048: 8880 0040 00258800 c3070050: 8880 0072 00257000 c3070058: 8880 0072 00257800 c3070060: 8880 0072 00256000 c3070068: 8880 005c 00256800 c3070070: 8880 005c 00255000 c3070078: 8880 0072 00255800 c3070080: 8880 0072 00254000 c3070088: 8880 0072 00254800 c3070090: 8880 0072 00253000 c3070098: 8880 0040 00253800 c30700a0: 8880 0040 00252000 c30700a8: 8880 0059 00252800 c30700b0: 8880 0062 00251000 c30700b8: 8880 0072 00251800 c30700c0: 8880 0072 00250000 c30700c8: 8880 0065 00250800 c30700d0: 8880 0068 0024f000 c30700d8: 8880 0040 0024f800 c30700e0: 8880 0072 0024e000 c30700e8: 8880 0072 0024e800 c30700f0: 8880 0072 0024d000 c30700f8: a880 0072 0024d800 NETDEV WATCHDOG: eth0: transmit timed out eth0: transmit timed out. What can I do, to get ethernet up and working? I appreciate your help, thank you very much. -- Cem Vedat ISIK cem.isik@karel.com.tr ----------------------------------------------------------------------- Bu mesaj Karel MailScanner ile tehlikeli icerik ve virus kontrolunden gecirilmistir. KAREL A.S. - Bilgi Teknolojileri Bolumu This message has been scanned for viruses and dangerous content by Karel MailScanner, and is believed to be clean. KAREL A.S. - Information Technologies Department