Just a quick entry today. Recently, I was hacking on a PXA3xx NAND flash support for OpenOCD. It's finally ready, though it has a few limitations. The preliminary version is available in the
OpenPXA GIT as always, though the patches are being pushed into mainline OpenOCD. The limitations mentioned before are that you can't erase multiple blocks as once, you have to do it one after another for now. Also, this driver for now works only for large block devices, but adding support for small block ones should be easy. And the driver is quite slow too, so it's probably only useful for flashing in the bootloader.
A quick howto on reflashing the bootloader using the NAND code in OpenOCD follows:
- run OpenOCD with the following command: openocd -s tcl -f board/colibri_pxa320.cfg -f interface/jtagkey.cfg (for Colibri/PXA3xx board and Amontec JTAGkey)
- connect to OpenOCD using telnet: telnet localhost 4444
- Issue the following commands, one after another:
- reset halt
- nand probe 0
- nand erase 0 0x0 0x20000 ; nand erase 0x20000 0x20000 (erase first two blocks)
- nand write 0 bootloader.img 0x0
- To read data from NAND, use: nand dump 0 dump.img 0x0 0x800 (0x0 is base address, 0x800 is amount of bytes)
