[ECOS] MCF5208 Ethernet not transmitting
Tarmo Kuuse
tarmo.kuuse@mail.ee
Thu Dec 4 15:49:00 GMT 2008
Hi!
Ethernet driver for ColdFire 5272/5282 was donated by eCosPro 2 weeks
ago (/devs/eth/m68k/mcf52782). Recent Coldfires have same Ethernet
controller as 5282. I had to make only trivial changes to create a 5208
port.
I conneted the MCF5208 EVBe to a computer running a sniffer. I use a
switch (to see activity LED blinking). Code is broadcasting a DHCP
query. Driver outputs nice tracing messages so all command traffic
to/from the FEC (Fast Ethernet Controller) is clearly visible.
Driver properly initializes and configures the FEC, puts it into "live"
mode, fills the buffer with data and tells it to transmit.
The PHY link is active, but nothing is sent. It looks like the FEC
completely ignores the TX request. It does not clear the TX request flag
in TDAR or "Ready" flag in the BD. It does not set any error flags in
EIR. Nothing happens - it looks like the controller is dead.
I have read the HW spec forwards and backwards. Everything seems OK. The
driver knows all the details - register and flag positions, command
sequence, buffer alignment, etc. Changelog shows it has been in
development for 5 years so I don't really expect to find any trivial
errors there.
I'm a bit stumped. I assume I missed something when porting, but the
changes were rather simple. I only enabled buffer alignment and set up
correct interrupts.
The debug output is at:
http://www.hot.ee/tarmospam/eth_trace_20081204.txt
Changes to source code are highlighted here:
http://www.hot.ee/tarmospam/diffreport.html
Any suggestions on how to get FEC up and running?
--
Kind regards,
Tarmo Kuuse
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