[U-Boot-Users] uboot basics ?

[Ram <vshrirama@gmail.com>]

Hi,
I am going through the uboot drivers code for smc91111 ethernet controller 
in uboot.

My Objective is to know how boot loader configures the ethernet controller.

This is for the first time i am going thru a boot loader code.

I have some doubts:

How does a boot loader know which device is connected. say i have connected 
the smc 91111 ethernet 
controller - how does it know it is smc91111 controller.

I think as soon as it detects the smc91111 controller is connected. it must 
configure that - i think the 
code in drivers/smc91111.c must be executed.

What will happen if there are 2 ethernet controllers in the board. how 
u-boot responds to this.

However, i am not following the code given in smc91111.c i really dont know 
what it is doing ?.

i have the data sheets with me and going thru it. i must admit i am totally 
confused.

Does anybody know what constitues configuring a ethernet controller and what 
the code does ?.

i would request you to kindly let me the flow in u-boot. from startup to 
configuring ind. devices.


Any description is available in this matter will be very useful. 


Any pointers in this matter is highly appreciated.


Thanks,


Regards,
Ram
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