Hi,
I did some googling and found some tools with functionality that maybe could be integrated into flashrom.
flasher is a tool to dump/flash LG drives with Renesas chipsets. (GPLv3) git://flasher.git.sourceforge.net/gitroot/flasher/flasher http://sourceforge.net/projects/flasher/
There is source code (for OS X) to flash firmware on Matshita drives: http://forum.rpc1.org/viewtopic.php?t=42953#p207704
At one point there was source available tool to also dump firmware from Matshita drives. (Unfortunately the link referenced in this forum post has expired.) http://forum.rpc1.org/viewtopic.php?t=43046
Some other tools for dumping/flashing are listed here, most of them without source code: http://forum.rpc1.org/viewtopic.php?t=44362
-mattias