Bug In v0.89 tulip.c
Mon Oct 5 00:04:00 1998
On Sun, 4 Oct 1998, Jason Ledbetter wrote:
> From: Jason Ledbetter <firstname.lastname@example.org>
[[ I replied to Jason privately. ]]
> I'm trying to get the integrated ethernet card in my Compaq Presario 5660
> working under 2.0.34. As far as I know, it is a 21143 based chipset .. at
> least according to Win98. The proc/pci output below seems to contradict
> Ethernet controller: DEC DC21142 (rev 65).
The 21142 and 21143 have the same PCI IDs. (Grrrr..)
> tulip-diag.c:v1.06 9/18/98 Donald Becker (email@example.com)
> Index #1: Found a Digital DS21143 Tulip adapter at 0x2400.
I always report it as a 21143. Few 21142 chips were made and this questions
was often asked.
> Digital DS21143 Tulip Tulip chip registers at 0x2400:
> f9a08000 ffffffff ffffffff 00096028 00096228 f0660000 b2422202 fbfffbff
> e0000000 fff483ff ffffffff 00000000 000000c6 ffff0000 fffbffff 8ff4c008
> The Rx process state is 'Waiting for packets'.
> The Tx process state is 'Idle'.
This is normal operation.
> Leaf node at offset 30, default media type 0800 (Autosense).
> 2 transceiver description blocks:
> Media 10baseT, block type 2.
> Media 10baseT-Full Duplex, block type 2.
You don't have 100mbps capabilitly with this design.
This is likely accurate. (A very common mistake is using the Digital design
kit EEPROM verbatim. If a designer changes the EEPROM they usually have a
> ... now something interesting.. after 5-10 seconds, if I rerun this again,
> I get the following diff'ed output.
> > f9a08000 ffffffff ffffffff 00096028 00096228 f0066000 b3862002 fbfffbff
> > e0000000 fff583ff ffffffff 00000000 000000c6 ffff0000 fffbff7f 8ff4c008
> > Transmit started, Receive started, half-duplex.
> > The transmit threshold is 128.
> > Port selection is 100mbps-SYM/PCS 100BaseTx scrambler, half-duplex.
This is because I recently modified the driver to ignore the EEPROM table.
Why? Because the EEPROM media table is so often wrong.
It should still detect the correct media type if you have a 10baseT cable
Donald Becker firstname.lastname@example.org
USRA-CESDIS, Center of Excellence in Space Data and Information Sciences.
Code 930.5, Goddard Space Flight Center, Greenbelt, MD. 20771