obp/obp/dev/network/bge/mif.fth

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\ Hypervisor Software File: mif.fth
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id: @(#)mif.fth 1.1 02/09/06
purpose:
copyright: Copyright 2002 Sun Microsystems, Inc.  All Rights Reserved
copyright: Use is subject to license terms.


headers

\ Routines to access the phy using the MDIO Auto-access method

1 value phy-adr        \ Internal phy address

: phy-cmd-complete?  ( -- error? )
   d# 5000
   begin                                        ( loops )
      1- dup 0>                                 ( loops notimeout? )
      h# 44c breg@ h# 2000.0000 and             ( loops notimeout? !complete? )
      and 0=                                    ( loops not-done? )
   until                                        ( loops )
   drop h# 44c breg@ h# 1000.0000 and           ( error? )
;

: phy@  ( reg-adr -- data error? )      \ 16 bits
   phy-cmd-complete? drop
   h# 1f and d# 16 <<                           \ shift in reg adr
   phy-adr h# 1f and d# 21 << or                \ shift in phy adr
   1 d# 29 << or                                \ set start bit
   2 d# 26 << or h# 44c breg!                   \ read transaction
   phy-cmd-complete?                            ( timeout? )
   h# 44c breg@ dup h# ffff and                 ( timeout? reg data )
   -rot h# 10000000 and or drop                 ( data error? )
;

: phy!  ( data reg-adr --  error? )     \ 16 bits
   phy-cmd-complete? drop
   h# 1f and d# 16 <<                           \ shift in reg adr
   phy-adr h# 1f and d# 21 << or                \ shift in phy adr
   swap h# ffff and or                          \ data
   1 d# 29 << or                                \ set start bit
   1 d# 26 << or h# 44c breg!                   \ write transaction
   phy-cmd-complete? drop
;