Hi all,
Im trying to use my NAND flash at MPC8360E-RDK based board. But it seems that the whole chip is bad blocked. Dont know if Im missing something... below some outputs:
=> nand info
Device 0: NAND 64MiB 3,3V 8-bit, sector size 16 KiB
=> nand bad 00000000 00004000 . . . 03ff4000 03ff8000 03ffc000 => nand erase clean
NAND erase: device 0 whole chip Skipping bad block at 0x00000000 Skipping bad block at 0x00004000 . . . Skipping bad block at 0x03ff8000 Skipping bad block at 0x03ffc000
OK =>
I read that any block that contains bytes != 0xff in the OOB is marked as "factory bad" block.
At nand_block_bad() function (drivers/nand/nand_base.c) I saw the implementation of the statment above.
--- this->cmdfunc (mtd, NAND_CMD_READOOB, this->badblockpos, page);
if (this->read_byte(mtd) != 0xff) res = 1; ---
So I did some dumps in NAND:
=> nand dump 0x00004000 Page 0x00004000 dump: . . . OOB: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=> nand dump 0x03ff8000 Page 03ff8000 dump: . . . OOB: 81 81 81 01 81 81 81 81 81 81 81 81 81 81 81 81
All dumps had OOB != 0xff
I also tried to write only 1 byte... no success:
=> tftpboot 0x02000000 kernel_blob.img => nand write.jffs2 0x02000000 0x0 0x1 . . . Bad block at 0x2010000 in erase block from 0x2010000 will be skipped writing NAND page at offset 0x2014000 failed Data did not fit into device, due to bad blocks 1 bytes written: ERROR =>
Any help/suggestions welcome.
Im using U-Boot-1.1.4 with NAND and FSL_UPM drivers from U-Boot-1.3.3
Cheers,
-- Alemao