* Davicom DM9000A regression
@ 2013-06-12 13:39 Nikita Kiryanov
2013-06-12 21:23 ` Francois Romieu
2013-06-13 6:22 ` Nikita Kiryanov
0 siblings, 2 replies; 4+ messages in thread
From: Nikita Kiryanov @ 2013-06-12 13:39 UTC (permalink / raw)
To: netdev; +Cc: josright123
Hi all.
I've encountered a connectivity problem with Davicom DM9000A chip.
The symptoms are the following message when booting via NFS:
dm9000 dm9000.0: eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1
A bit of digging revealed the cause as this patch:
"DM9000B: driver initialization upgrade"
and specifically, the following line that was added by it:
dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
(uncommenting this line solves the problem).
Adding a delay after the phy reset did not help.
I'll appreciate any insight someone might have on this issue.
--
Regards,
Nikita.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Davicom DM9000A regression
2013-06-12 13:39 Davicom DM9000A regression Nikita Kiryanov
@ 2013-06-12 21:23 ` Francois Romieu
2013-06-13 6:58 ` Nikita Kiryanov
2013-06-13 6:22 ` Nikita Kiryanov
1 sibling, 1 reply; 4+ messages in thread
From: Francois Romieu @ 2013-06-12 21:23 UTC (permalink / raw)
To: Nikita Kiryanov; +Cc: netdev, josright123
Nikita Kiryanov <nikita@compulab•co.il> :
[...]
> A bit of digging revealed the cause as this patch:
> "DM9000B: driver initialization upgrade"
(aka 6741f40d198c6a5feb23653a1efd4ca47f93d83d)
> and specifically, the following line that was added by it:
> dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
> (uncommenting this line solves the problem).
> Adding a delay after the phy reset did not help.
(I have no idea why Davicom enforced a dsp phy register write everywhere
instead of using db->type to identify the specific chipset revision that
requires it)
The last version of the patch changed - not much - without notice and
it did not contain the "tested on DM9000{A, B, E}, x86, arm" part.
You may try http://marc.info/?l=linux-netdev&m=136443908225335 to
see if it behaves the same.
--
Ueimor
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Davicom DM9000A regression
2013-06-12 13:39 Davicom DM9000A regression Nikita Kiryanov
2013-06-12 21:23 ` Francois Romieu
@ 2013-06-13 6:22 ` Nikita Kiryanov
1 sibling, 0 replies; 4+ messages in thread
From: Nikita Kiryanov @ 2013-06-13 6:22 UTC (permalink / raw)
To: netdev; +Cc: josright123, davem
On 06/12/2013 04:39 PM, Nikita Kiryanov wrote:
> Hi all.
>
> I've encountered a connectivity problem with Davicom DM9000A chip.
> The symptoms are the following message when booting via NFS:
> dm9000 dm9000.0: eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1
Eh, copy pasted the wrong thing.
The message is a link down message:
dm9000 dm9000.0: eth0: link down
Also, CC-ing David Miller
--
Regards,
Nikita.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-06-13 6:58 UTC | newest]
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2013-06-12 13:39 Davicom DM9000A regression Nikita Kiryanov
2013-06-12 21:23 ` Francois Romieu
2013-06-13 6:58 ` Nikita Kiryanov
2013-06-13 6:22 ` Nikita Kiryanov
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