% sudo ./usbboot -f ../doc/usbboot.cfg 
usbboot - Ingenic XBurst USB Boot Utility
(c) 2009 Ingenic Semiconductor Inc., Qi Hardware Inc., Xiangfu Liu, Marek Lindner
This program is Free Software and comes with ABSOLUTELY NO WARRANTY.

Now checking whether all configure args valid: YES
Current device information:
CPU type is Ingenic XBurst Jz4740
Crystal work at 12MHz, the CCLK up to 252MHz and PMH_CLK up to 84MHz
SDRAM Total size is 32 MB, work in 4 bank and 16 bit mode
Nand page per block 128, Nand page size 2048, ECC offset in OOB 6, bad block offset in OOB 0, bad block page 127, use 1 plane mode
usbboot :> help
 command support in current version:
 nquery     query NAND flash info
 nerase     erase NAND flash
 nread      read NAND flash data with checking bad block and ECC
 nreadraw   read NAND flash data without checking bad block and ECC
 nreadoo    read NAND flash oob without checking bad block and ECC
 nprog      program NAND flash with data and ECC
 help       print this help
 version    show current USB Boot software version
 go         execute program in SDRAM
 fconfig    set USB Boot config file(not implement)
 exit       quit from telnet session
 readnand   read data from nand flash and store to SDRAM
 gpios      set one GPIO to high level
 gpioc      set one GPIO to low level
 boot       boot device and make it in stage2
 list       show current device number can connect(not implement)
 nmark      mark a bad block in NAND flash
 nmake      read all data from nand flash and store to file(not implement)
 load       load file data to SDRAM
 memtest    do SDRAM test
 run        run command script in file(implement by -c args)
 sdprog     program SD card(not implement)
 sdread     read data from SD card(not implement)
usbboot :>