[U-Boot-Users] [PATCH] lan91c96 driver MAC address detection

[Dave Peverley]

Wolfgang Denk wrote:
> The rules are simple and documented:
Sure, I've read these...

> You cannot use BOOTP (nor ony  other  network  related  protocol)  to
> detect a MAC address!!!
I think that either we operate on utterly different brainwave-lengths 
or theres some kind of language barrier issue here!

If you issue a 'bootp' command to u-boot via its interface as I stated, 
the following call sequence happens if you're using the lan91c96 (with 
patch) or smc91111 ethernet devices :
  
   do_bootp()                     [cmd_net.c]
    netboot_common()              [cmd_net.c]
     NetLoop()                    [net.c]
      eth_init()                  [lan91c96.c]
       smc_open()                 [lan91c96.c]
        smc_get_ethaddr()         [lan91c96.c]
         get_rom_mac()            [lan91c96.c]
 
So in practical use, issuing a bootp detects the mac address of the 
adapter. 

> (nor ony  other  network  related  protocol) 
Well, the following network related protocol calls :
  do_tftpb()
  do_rarpb()
  do_dhcp()
  do_nfs()
all call netboot_common() so will in effect detect the MAC address as 
well ;-)

Best Wishes,

Dave Peverley

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             Dave Peverley, Software Engineer, MPC Data Limited.
Phone : [+44] (0) 1225 868 228              Web : http://www.mpc-data.co.uk