Re: [ECOS] PCI Ethernet card

["Michael Anburaj" <embeddedeng at hotmail dot com>]

Hi Eric,

> a. Check the value of the basic mode status register (0x64), the
> auto-negotiation registers (0x66, 0x68, 0x6A), and the disconnect (0x6c)
> and false carrier sense (0x6e) counters.

BMCR = 0x1000            - enable auto-negotiation
BMSR = 0x7809 (default)
ANAR = 0x01e1 (default)
ANLPAR = 0x0000
ANER = 0x0000
DIS = 0x0000
FCSC = 0x0000

> b. Force the 8139 to use a particular speed and duplex mode by setting
> bits #13 and #8 in the basic mode control register (0x62) explicitely.
> Don't forget to disable autonegotiation by clearing bit #12. (I'm
> assuming that the EEPROM on your card selects autonegotiation by
> default).

Yes you are right. To keep things simple, I will start out by doing this. 
But, is it not ok to set this bit (auto-negotiation)?

I am still reading the documentation & trying to understand it better.

Questions:
1. Is the auto-negotiation (sending & receiving negotiation packets) under 
software (device driver)  control?
      a. If yes, does the rltk8139 driver Ver 2 support this feature? Or 
does it assume fixed link parameters?
     b.If no, then is there a problem with the Hub (the link partner on the 
other side of this link)? < Presumably, the both sides understand 
?auto-negotiation?, should negotiate the link parameters & settle down for 
actual transfers (with the sable connection - Link Status bit of BMSR set), 
am I right? >

Thanks,
-Mike.

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