I was just looking at the PSP SDK, and without assembly or something, I dont think (in my mega-nooby opinion) that it will be easily do-able. Basically, the descriptors for the USB in PSGroove are absolutly giant, probably because they are the buffer overflow. The PS3 doesnt expect it do be this long, and unfortunatly, neither does the PSP. The PSP wants: unsigned char desc; for the config descriptor, but the PSGroove requires a MUCH larger amount for the port1_config_descriptor.
It may be possible, because the USB HUB seems to have decent descriptor lengths, and maybe we could make the PSP appear as one and then run data down the USB to pretend its putting in another USB device, but I'm not sure if the firmware wouldn't stuff up the message.
I havn't done PSP development in a long time, and I've never touched USB stuff, but from the looks of it, it wont be too easy.
i know you can remove the jailbreak now, but do you still need to have it connected on each start of your PS3 for it to work? or is it a one time only jailbreak deal. jailbreak it once and never have to connect the dongle again?
Ummm... i think you answered your own question.. "supported devices.. " implies that it requires AT90USB1287 and therefore this chipset is not included.
But the pdf i linked had the chip drawn in in the schematics. So if this work it would be perfect for me... Because its small. A little expensive because of the unneeded 2.4ghz tranciever but its in stock.
There may be a simple way to not causing any problems oneline. if you have updated you ps3 hdd to a bigger size you may still have your stock hdd. Just pop the stock hdd in your ps3. that way your ps3 will be as sony intended.