Dear All!
I have a custom board with an IMX6ULL on it.
It's set up to boot from NAND flash (MT29F2G08ABAGAWP)
I want to flash BCB area using u-boot command.
So I flashed BCB area as follow step
Step 1. Flash NAND boot(BCB) area using uuu command.
kobs-ng init -x -v --chip_0_device_path=/dev/mtd${NAND_uboot} /tmp/boot
Step 2. Update BCB area using u-boot command.
=> usb start
=> mw.b 0x81000000 0xFF 0x100000
=> fatload usb 0:1 0x81000000 u-boot.imx
=> nandbcb init 0x81000000 NAND_uboot ${filesize}
But I found some dump value was different.
(Compared uuu flashed hex dump value of BCB area with u-boot command hex dump value of BCB area)
<uuu flashed hex dump value of BCB area> <u-boot command hex dump value of BCB>
These two nandbcb dump value is same like as belows
=> nandbcb dump NAND_uboot
device 0 offset 0x0, size 0x300000
NAND FCB read from 0x0 offset 0x400 read: OK
NAND FCB read from 0x20000 offset 0x400 read: OK
NAND FCB read from 0x40000 offset 0x400 read: OK
NAND FCB read from 0x60000 offset 0x400 read: OK
NAND DBBT read from 0x80000 offset 0x14 read: OK
NAND DBBT read from 0xa0000 offset 0x14 read: OK
NAND DBBT read from 0xc0000 offset 0x14 read: OK
NAND DBBT read from 0xe0000 offset 0x14 read: OK
FCB
checksum = 0xfffffbec
fingerprint = 0x20424346
version = 0x01000000
datasetup = 80
datahold = 60
addr_setup = 25
dsample_time = 6
pagesize = 2048
oob_pagesize = 2176
sectors = 64
nr_nand = 0
nr_die = 0
celltype = 0
ecc_type = 4
ecc_nr = 512
ecc_size = 512
ecc_level = 4
meta_size = 10
nr_blocks = 3
ecc_type_sdk = 0
ecc_nr_sdk = 0
ecc_size_sdk = 0
ecc_level_sdk = 0
nr_blocks_sdk = 0
meta_size_sdk = 0
erase_th = 0
bootpatch = 0
patch_size = 0
fw1_start = 512
fw2_start = 1024
fw1_pages = 342
fw2_pages = 342
dbbt_start = 256
bb_byte = 1999
bb_start_bit = 0
phy_offset = 2048
bchtype = 0
readlatency = 0
predelay = 0
cedelay = 0
postdelay = 0
cmdaddpause = 0
datapause = 0
tmspeed = 0
busytimeout = 0
disbbm = 0
spare_offset = 0
onfi_sync_enable = 0
onfi_sync_speed = 0
onfi_sync_nand_data = 0
disbbm_search = 0
disbbm_search_limit = 0
read_retry_enable = 0
DBBT :
checksum = 0x00000000
fingerprint = 0x54424244
version = 0x01000000
dbbtpages = 0
Firmware: image #0 @ 0x200 size 0xab000
Firmware: image #1 @ 0x400 size 0xab000
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<Question>
1. Why these two hex dump values are different?
2. Device that BCB area is flashed by u-boot command is, OK?
(I want to use this nandbcb command if this method is OK)
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Best Regards
gnani
