Document:	Flashing bootloader 

Copyright (c) 2009, Voipac Technologies a.s.


It is required to have OpenOCD based USB jtag adapter from Voipac or compatible.
Refer to folowing location about how to install OpenOCD JTAG software.

http://voipac.com/downloads/jtag/doc/vpaclink-jtag.txt


Connect USB JTAG adapter to 20pin JTAG connector on baseboard and USB port on PC.
Plug in dimm module and power up the baseboard, startup OpenOCD daemon with configuration in vpac270.cfg.

bash$> openocd -f vpac270.cfg

Open On-Chip Debugger 1.0 (2009-03-02-21:09) svn:1383

BUGS? Read http://svn.berlios.de/svnroot/repos/openocd/trunk/BUGS

$URL: svn://svn.berlios.de/openocd/trunk/src/openocd.c $
jtag_speed: 0
Info : JTAG tap: pxa270.cpu tap/device found: 0x79265013 (Manufacturer: 0x009, Part: 0x9265, Version: 0x7)
Info : JTAG Tap/device matched
Warn : no tcl port specified, using default port 6666


In other terminal window use telnet to connect to OpenOCD daemon.

bash$> telnet localhost 4444

Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Open On-Chip Debugger
>


Download latest bootloader binaries and move it to TFTP root directory.

bash$> wget http://voipac.com/downloads/pxa/270m/dimm/bin/linux/x-load.bin
bash$> wget http://voipac.com/downloads/pxa/270m/dimm/bin/linux/u-boot-1.1.2-vpac4m.bin
bash$> mv x-load.bin u-boot-1.1.2-vpac4m.bin /tftpboot


Connect serial console cable, open minicom and set it to mode 38400, 8N1.
In OpenOCD terminal execute following commands to download bootloader binary to PXA270 SRAM and execute it.

> reset halt
JTAG tap: pxa270.cpu tap/device found: 0x79265013 (Manufacturer: 0x009, Part: 0x9265, Version: 0x7)
JTAG Tap/device matched
target state: halted
target halted in ARM state due to debug-request, current mode: Supervisor
cpsr: 0x080000d3 pc: 0x00000000
MMU: disabled, D-Cache: disabled, I-Cache: disabled
(processor reset)

> load_image /tftpboot/u-boot-1.1.2-vpac4m.bin 0x5c010000
55752 byte written at address 0x5c010000
downloaded 55752 byte in 0.359166s

> resume 0x5c010000


After power cycling baseboard, the u-boot bootloader should come up.

U-Boot 1.1.2-vpac4 (Feb 26 2009 - 18:20:24)

U-Boot code: 5C010000 -> 5C01D9C8  BSS: -> 5C0214D8
RAM Configuration:
Bank #0: a0000000 64 MB
Bank #1: 80000000  0 kB
OneNAND: Scanning device for bad blocks
Bad eraseblock 22 at 0x002c0000
Flash: 128 MB
*** Warning - bad CRC, using default environment

dm9000 i/o: 0x8000300 (32bit), id: 0x90000a46 
MAC: 00:01:02:03:04:05                                                          
Hit any key to stop autoboot:  0                                                
u-boot>


Use TFT to download first stage boot loader x-load.bin and write it to flash at offset 0.

u-boot> erase all
u-boot> tftp x-load.bin
u-boot> cp.b a1000000 0 400


NOTE: During erase some blocks may fail to erase, those are bad blocks which may appear.

Download second stage bootloader and write it to flash at offset 0x800.

u-boot> tftp u-boot-1.1.2-vpac4m.bin
u-boot> cp.b a1000000 800 $(filesize)


After power cycling baseboard, the first stage X-Loader and next u-boot bootloader should come up.
                                                                                
NAND X-Loader 1.22                                                              
                                                                                
                                                                                
U-Boot 1.1.2-vpac4 (Feb 26 2009 - 18:20:24)                                     
                                                                                
U-Boot code: 5C010000 -> 5C01D9C8  BSS: -> 5C0214D8                             
RAM Configuration:                                                              
Bank #0: a0000000 64 MB                                                         
Bank #1: 80000000  0 kB                                                         
OneNAND: Scanning device for bad blocks                                         
Bad eraseblock 22 at 0x002c0000                                                 
Flash: 128 MB                                                                   
*** Warning - bad CRC, using default environment                                
                                                                                
dm9000 i/o: 0x8000300 (32bit), id: 0x90000a46                                   
MAC: 00:01:02:03:04:05                                                          
Hit any key to stop autoboot:  0                                                
u-boot>