obp/obp/dev/usb-devices/hub/hub-required.fth

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\ Hypervisor Software File: hub-required.fth
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\ ========== Copyright Header End ============================================
id: @(#)hub-required.fth 1.8 01/09/20
purpose:
copyright: Copyright 1998-2001 Sun Microsystems, Inc.  All Rights Reserved

create bad-number                       \ "Bad number syntax"
   d# 17 c,
   ascii B c,  ascii a c,  ascii d c,  bl c,  ascii n c,
   ascii u c,  ascii m c,  ascii b c,  ascii e c,  ascii r c,
   bl c,  ascii s c,  ascii y c,  ascii n c,  ascii t c,
   ascii a c,  ascii x c,  0 c,

: $>number  ( adr len -- n )
   $number  if  bad-number throw  then
;

0 value open-count

external

: decode-unit  ( adr len -- port# )
   base @ >r  hex
   dup if  $>number
   else  2drop  bad-number throw
   then
   r> base !
;

10 buffer: unit-address         \ can be used while no instance is open.

\ XXX check the other encode-units for other modules -- uses a volatile
\ area.
: encode-unit  ( port# -- adr len )
   unit-address 10 erase
   base @ >r  hex
   <# u#s u#>
   dup >r
   unit-address swap move
   unit-address r>
   r> base !
;


\ XXX open dma-alloc a request packet and a data buffer (close dma-free them)
\ for talking to the status endpoint.
\ XXX need two data buffers, one for config-descrip, one for dev-descrip
\ maybe three?
: open  ( -- ok )
   open-count 0=  if
      /request dma-alloc  to request-blank
      /common-buffer dma-alloc  to common-buffer
      0max-packet to max-packet
   then
   open-count 1+  to open-count
   true
;

: close  ( -- )
   open-count 1-  to open-count
   open-count 0=  if
      common-buffer /common-buffer dma-free
      -1 to common-buffer
      request-blank /request dma-free
      -1 to request-blank
   then
;

: reset  ( -- )  ;

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