Thanks a lot for quick reply --> Toru Nishimura

> Feng Xiagen wrote;
> 
> > 1.It cannot recognize the cable media at all.
> > ...
The manual tell that it can use External PHY or Internal PHY selectively.
I guess whether this special SMsC 91C111 is using External PHY.

> > 2.IP setting action will shut you link state DOWN for ever
> 
> There are large number of ARM boards equipped with SMsC 91C111
> or CS8900A in market.  They are claimed as a 'Non-PCI/Local Bus'
> Ethernet controllers, however, they are rebadgged legacy ISA devices
> in fact (imposing offset 0x300 as if ISA I/O space makes no sense
> memory mapped device scheme, look at the number of 'address' pins).
> 
> The issue of 91C111 is the after-thought MII/internal PHY upgrade to
> old ISA design HW.  I could manage to run 91C111 hooked to a certain
> ARM9 SoC after enormous hardship.  If I had a chance to do it again, I
> would choose LAN9118 which has re-designed modern FIFO architecture
> from ground.  Tx logic is scattered mbuf friendly and Rx ptr can be
> offset to absorb STRICT_ALIGNMENT.  Many of ARM9 SoC DMA circuits
> look like each other and NetBSD would make a good fit.
> 
> > at sm0 phy 0: Seeq 84220 10/100 media interface, rev. 0
> > sqphy0: using Seeq 84220 isolate/reset hack
> > sqphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
> 
> In your case it looks PHY is never controlled well.  Considerable
> amount effort would be necessary around MII/PHY control; probing
> pins to see _real_ electorical activities, or inserting ASSERTIONs make
> sure SW logic does the right things as expected.
I will refer to some Linux source and fix it.
I will report further if there is any progress.

> 
> Toru Nishimura/ALKYL Technology