On 02/05/2013 07:37:20 AM, Robert P. J. Day wrote:
a few basic questions about a board i don't have access to right this minute but did yesterday and will later today. it's an AM1808 experimenter kit lookalike except that it has (allegedly) had its NOR flash replaced with 2G of NAND flash, and i want to figure out what i can add to the current u-boot da850evm configuration to let me poke around and get all the info i can on that flash because there seems to be something strange about the current setup.
first, when i let the board boot fully into linux, "dmesg" told me this:
"NAND device: Manufacturer ID: 0x2c, Chip ID: 0xdc (Micron NAND 512MiB 3,3V 8-bit)"
that appears to tell me 512M of NAND flash, not 2G. i asked someone who was initially adamant that there was 2G but promised to check with the H/W folks to make absolutely sure. is there a possible reason why 2G would show up only as 512M in dmesg? (not really a u-boot question, just wondering.)
Is it possible you have 4 chips, each of which are 512 MiB?
If that's not it, probably the ID table is wrong. Maybe they're using the same ID for multiple sizes now (it's not exactly a large numberspace), and expecting you to use ONFI or other ID bytes to determine the actual size.
What does U-Boot print on boot, regarding NAND?
-Scott