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
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