[openwince-list] Wiggler IXDPG425 RedBoot HOWTO

[Stewart H. <st...@he...>]

Here are instructions for programming a RedBoot image into
the FLASH of the Intel IXDPG425 board using a McRaigor Wiggler
and openwince JTAG (0.5.1) tools under Linux.
Much of the credit goes to Rogier Stam who helped me get this
working, and I am posting the results to help future generations.

Firstly, there appears to be differences in the way different
versions of the McRaigor Wigglers function.
Newer Wigglers seem to draw power on previously unused pins of
the parallel port. A patch to the jtag-0.5.1 is required to fix
this as well as some other patches relating to the IXP425.
All those patches (1060345, 1030647, 1040199) already exist on
the openwince Sourceforge site
  http://sourceforge.net/tracker/?atid=469852&group_id=52603&func=browse
but Rogier has collated them into one single patch which I am
attaching to this posting for convenience.
WARNING: the Wiggler-related patch will NOT apply to all Wigglers.
My Wiggler (which does require the patch) was bought new from
McRaigor in July 2005 and has no identifying marks other than
"CE NP-JTAG XSCALE".


STEP 1: INSTALL JTAG INCLUDE-0.3.2
  $ tar -xvjf include-0.3.2.tar.bz2  
  $ cd include-0.3.2   
  $ ./configure
  $ su
  $ make install
  $ exit

STEP 2: PATCH, BUILD, AND INSTALL JTAG-0.5.1
  $ tar -xvjf jtag-0.5.1.tar.bz2     
  $ patch -p0 < ixp425wiggler.patch
  patching file jtag-0.5.1/data/intel/ixp425/STEPPINGS
  patching file jtag-0.5.1/data/intel/PARTS
  patching file jtag-0.5.1/libbrux/flash/jedec.c
  patching file jtag-0.5.1/src/tap/cable/wiggler.c
  $ cd jtag-0.5.1 
  $ ./configure
  $ make
  $ su
  $ make install
  $ exit

STEP 3: BYTE-SWAP YOUR BOOT IMAGE
The binary image must be byte-swapped prior to writing to FLASH
on the Intel IXP425 boards. Here we create a byte-swapped version
of redboot_ROM.bin in redboot_ROM_BS.bin
  $ dd if=redboot_ROM.bin of=redboot_ROM_BS.bin conv=swab

Check that it resembles this:
  $ hexdump redboot_ROM_BS.bin | head
  0000000 e59f f018 e59f f018 e59f f018 e59f f018
  0000010 e59f f018 0000 0000 e59f f018 e59f f018
  0000020 0000 0040 5000 0504 5000 0528 5000 0554
  0000030 5000 0570 0000 0000 5000 0688 5000 0650
  0000040 ee11 0f10 e380 0080 ee01 0f10 ee12 0f10
  0000050 e1a0 0000 e24f f004 e3a0 00d3 e129 f000
  0000060 ee07 0f17 ee12 0f10 e1a0 0000 e24f f004
  0000070 ee08 0f17 ee12 0f10 e1a0 0000 e24f f004
  0000080 ee07 0f9a ee12 0f10 e1a0 0000 e24f f004
  0000090 ee11 0f30 e380 0001 ee01 0f30 ee12 0f10

STEP 4: CHECK PARALLEL PORT BIOS SETTINGS
  JTAG does not support parallel ports in ECP mode.
  Check the settings in your BIOS are not ECP (I use BI-DIR)
  and note your parallel port address (usually 0x378).

STEP 5: BURN YOUR BOOT IMAGE TO FLASH
  $ jtag
  jtag> cable parallel 0x378  WIGGLER
  jtag> detect
  jtag> detectflash
  jtag> eraseflash 0x50000000 4
  jtag> flashmem 0x50000000 redboot_ROM_BS.bin 
  jtag> quit

It takes about 45 minutes to burn a 256KB image.
I have found that I can reboot the target board with the
JTAG connector still attached provided I have quit jtag-tools.

If you have the parport support in your kernel and don't have
any printer software (CUPS, LPD) loaded then you could
alternatively use
  jtag> cable ppdev /dev/parport0  WIGGLER
instead of 
  jtag> cable parallel 0x378  WIGGLER


Good luck!
-- 
Stewart Heitmann