obp/obp/dev/usb2/device/storage/atapi.fth

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\ Hypervisor Software File: atapi.fth
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id: @(#)atapi.fth 1.1 07/01/24
purpose: ATAPI interface
\ See license at end of file

hex

headers

d# 12 dup constant pkt-len
buffer: pkt-buf

\ ATAPI devices only accept 12 byte long commands
\ Fixup the SCSI commands before sending them out

: translate-atapi-command  ( cmd-adr,len -- pkt-buf,len )
   pkt-buf dup >r pkt-len erase                 \ Zero pkt-buf
   r@ swap move                                 \ Copy cmd$ to pkt-buf
   r@ c@ dup h# 15 = swap h# 1a = or  if        \ Mode send or mode select command
      r@ c@ h# 40 or r@ c!                      \ Fix it
      r@ 4 + c@ r@ 8 + c!
      0 r@ 4 + c!
   else
      r@ c@ dup 8 = swap h# a = or  if          \ Read or write command
         r@ c@ h# 20 or r@ c!                   \ Fix it
         r@ 1+ c@ dup h# e0 and r@ 1+ c!
         r@ 4 + c@ r@ 8 + c!
         r@ 3 + c@ r@ 5 + c!
         r@ 2 + c@ r@ 4 + c!
         h# 1f and r@ 3 + c!
         0 r@ 2 + c!
      then
   then
   r> pkt-len
;

: init-atapi-execute-command  ( -- )
   " is-atapi" get-my-property 0=  if
      2drop
      ['] translate-atapi-command to execute-command-hook
   then
;
' init-atapi-execute-command  to init-execute-command

\ LICENSE_BEGIN
\ Copyright (c) 2006 FirmWorks
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