NAND flash on dbmx1ads

[z xw]

Dear All,

          I want to use the k9f2808 NAND flash on my mx1ads board, and I 
use kernel 2.4.27 version. Also, the nand_scan function can sucussfully 
read the manufacture id and vendor id from my nand flash, but when boot up, 
it will pop up such following message, it seems that the kernel try to 
erase the NAND flash but failed and the whole kernel halt.
          Anybody has encounterred such a situation. I really got a 
headache on my NAND device. Thanks for you help.
          The kernel boot up information is as below:

Linux version 2.4.27-vrs1-ssl7 (root at localhost.localdomain) (gcc version 
3.2.3) #22 五 10月 21 18:01:05 CST 2005
CPU: Arm920Tid(wb) revision 0
Machine: Motorola MX1ADS
......
start to init nand flash
ep7312_fio_pbase=0xf2000000
ep7312_fio_base=0xf2000000
start to scan the mx1 nand flash
nand_scan() function start
nand_command
nand_maf_id=0xec,nand_dev_id=0x73
NAND device: Manufacture ID: 0xec, Chip ID: 0x73 (Samsung NAND 16MB 3,3V)
bp6
nand_scan() function end
Using static partition definition
Creating 1 MTD partitions on "NAND 16MB 3,3V":
0x00000000-0x01000000 : "MX1 Nand Flash"
init nand flash complete
SDRAM disk initialized.
cramfs: wrong magic
FAT: bogus logical sector size 29440
UMSDOS: msdos_read_super failed, mount aborted.
FAT: bogus logical sector size 29440
FAT: bogus logical sector size 29440
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000000: 
0x3de5 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000004: 
0xe073 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000008: 
0x00ef instead
......
......
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x004e0004: 
0x00ad instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x004e0008: 
0xb0f3 instead
JFFS2: Erase block at 0x004e0000 is not formatted. It will be erased
Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes
Kernel panic: VFS: Unable to mount root fs on 1f:02


Regards,
Vincent Zhou

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