async page mode flash support?
Brian Kuschak
bkuschak at yahoo.com
Fri Sep 12 15:32:57 EDT 2008
Do the current CFI physmap flash drivers (2.6.18+) support NOR flash configured to operate in async page mode?
When I enable async page mode access in the memory controller, the CFI probe fails. I can verify on a logic analyzer and BDI-2000 that the CPU is doing an 8-word (16 byte) burst read from the flash. My bootrom and BDI-2K verify that the data is in fact transferred properly (csums match in regular and page-mode reads). However, linux fails the cfi probe. It looks like the CFI query commands are in fact sent as single-word cycles, not burst mode. (This is as it should be).
Anyone else successful using page-mode flash?
Thx,
Brian
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