Hi,
Sorry, for the slightly off-topic post, but I figured someone else might have faced a similar issue.
I'm in the process of bringing up an MPC8349E PowerPC based board. The board is configured as a compact PCI peripheral board. The board will boot U-Boot off on-board Spansion S29GL-N Flash, and U-Boot will then boot Linux. The cPCI interface is used to communicate with an x86 host CPU board.
The final system will have 15 boards per cPCI crate, and there will be 8 crates. I can use a BDI2000 to program the Flash on a board, but this doesn't scale so well when wanting to perform Flash updates on crates full of boards using the x86 host CPU.
Basically I'll have a setup where an x86 host can see the Flash on the PowerPC boards via PCI memory regions. In the case of a new board with a blank flash, the PowerPC core will be held in reset, so without using JTAG/COP, only the x86 host CPU can program the flash.
As far as flash manipulation from a PowerPC on a single board goes, I figured that once I have U-Boot and Linux working, I would just use the MTD subsystem.
However, its less clear to me whether I can use MTD on the x86 Linux host CPU, to access the flash devices on multiple boards via the PCI bus.
The documentation at:
http://www.linux-mtd.infradead.org/
wasn't much help, so I'll go and look at the code.
So while I go read some more, I figured I'd ask if anyone else has used the MTD system in a similar way for programming their flash.
Recommendations anyone?
Thanks!
Regards, Dave.