[BUG] pxa3xx: wait time out when scanning for bb

Hi Sean,

Post by Sean NyekjÃ¦r
I'm currently in the process of doing bringup on a custom armada 38x
board. During the firsts boots of the Linux kernel we saw that the
NAND driver throws a lot of timeout messages.
[ 28.321054] pxa3xx-nand f10d0000.flash: Wait time out!!!
[ 28.521054] pxa3xx-nand f10d0000.flash: Wait time out!!!
[ 28.721054] pxa3xx-nand f10d0000.flash: Wait time out!!!

Could you paste the entire dmesg please ?

Also, what kernel are you using ?

Post by Sean NyekjÃ¦r
That lead me to investigate the issue and found this thread (quite
old): https://www.spinics.net/lists/arm-kernel/msg488581.html
In the thread some is describing a possible race condition when the
NAND framework is scanning for bad blocks.

Not sure this is still relevant, but, who knows.

Thanks,
Miquèl

Sean Nyekjær

2017-11-28 13:12:45 UTC

Hi Miquel

Post by Miquel RAYNAL
Hi Sean,

Could you paste the entire dmesg please ?

Sure, se below. BBT is disabled

Post by Miquel RAYNAL
Also, what kernel are you using ?

4.14.0 :-)

Not sure this is still relevant, but, who knows.
Thanks,
Miquèl

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.14.0-00023-gd0f553c82aac-dirty (***@skn)
(gcc version 7.2.0 (Arch Repository)) #46 SMP PREEMPT Tue Nov 28
12:44:43 CET 2017
[    0.000000] CPU: ARMv7 Processor [414fc091] revision 1 (ARMv7),
cr=10c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
instruction cache
[    0.000000] OF: fdt: Machine model: Triax DVB-TC Output
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] random: fast init done
[    0.000000] percpu: Embedded 17 pages/cpu @ef7ca000 s37132 r8192
d24308 u69632
[    0.000000] Built 1 zonelists, mobility grouping on. Total pages: 260608
[    0.000000] Kernel command line: console=ttyS0,115200 ubi.mtd=1
mtdparts=pxa3xx_nand-0:1m(uboot),-(ubi0) shell
[    0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
[    0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288
bytes)
[    0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144
bytes)
[    0.000000] Memory: 1026888K/1048576K available (6144K kernel code,
428K rwdata, 1328K rodata, 1024K init, 159K bss, 21688K reserved, 0K
cma-reserved, 262144K highmem)
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap : 0xffc00000 - 0xfff00000   (3072 kB)
[    0.000000]     vmalloc : 0xf0800000 - 0xff800000   ( 240 MB)
[    0.000000]     lowmem : 0xc0000000 - 0xf0000000   ( 768 MB)
[    0.000000]     pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
[    0.000000]     modules : 0xbf000000 - 0xbfe00000   ( 14 MB)
[    0.000000]       .text : 0xc0008000 - 0xc0700000   (7136 kB)
[    0.000000]       .init : 0xc0900000 - 0xc0a00000   (1024 kB)
[    0.000000]       .data : 0xc0a00000 - 0xc0a6b230   ( 429 kB)
[    0.000000]        .bss : 0xc0a6b230 - 0xc0a9317c   ( 160 kB)
[    0.000000] Preemptible hierarchical RCU implementation.
[    0.000000]     RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=2.
[    0.000000]     Tasks RCU enabled.
[    0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[    0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[    0.000000] L2C-310 enabling early BRESP for Cortex-A9
[    0.000000] L2C-310 full line of zeros enabled for Cortex-A9
[    0.000000] L2C-310 D prefetch enabled, offset 1 lines
[    0.000000] L2C-310 dynamic clock gating enabled, standby mode enabled
[    0.000000] L2C-310 Coherent cache controller enabled, 16 ways, 1024 kB
[    0.000000] L2C-310 Coherent: CACHE_ID 0x410054c9, AUX_CTRL 0x56070001
[    0.000010] sched_clock: 64 bits at 533MHz, resolution 1ns, wraps
every 2199023255551ns
[    0.000023] clocksource: arm_global_timer: mask: 0xffffffffffffffff
max_cycles: 0x7aed16d152, max_idle_ns: 440795225656 ns
[    0.000042] Switching to timer-based delay loop, resolution 1ns
[    0.000209] Ignoring duplicate/late registration of
read_current_timer delay
[    0.000219] clocksource: armada_370_xp_clocksource: mask: 0xffffffff
max_cycles: 0xffffffff, max_idle_ns: 76450417870 ns
[    0.000559] Console: colour dummy device 80x30
[    0.000580] Calibrating delay loop (skipped), value calculated using
timer frequency.. 1066.00 BogoMIPS (lpj=5330000)
[    0.000590] pid_max: default: 32768 minimum: 301
[    0.000671] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)
[    0.000680] Mountpoint-cache hash table entries: 2048 (order: 1, 8192
bytes)
[    0.001053] CPU: Testing write buffer coherency: ok
[    0.001211] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.040132] Setting up static identity map for 0x100000 - 0x100060
[    0.040228] mvebu-soc-id: MVEBU SoC ID=0x6810, Rev=0x4
[    0.040323] mvebu-pmsu: Initializing Power Management Service Unit
[    0.060106] Hierarchical SRCU implementation.
[    0.100104] smp: Bringing up secondary CPUs ...
[    0.170166] Booting CPU 1
[    1.200101] CPU1: failed to come online
[    1.200154] smp: Brought up 1 node, 1 CPU
[    1.200160] SMP: Total of 1 processors activated (1066.00 BogoMIPS).
[    1.200165] CPU: All CPU(s) started in SVC mode.
[    1.200696] devtmpfs: initialized
[    1.202583] VFP support v0.3: implementor 41 architecture 3 part 30
variant 9 rev 4
[    1.202704] clocksource: jiffies: mask: 0xffffffff max_cycles:
0xffffffff, max_idle_ns: 19112604462750000 ns
[    1.202715] futex hash table entries: 512 (order: 3, 32768 bytes)
[    1.202821] pinctrl core: initialized pinctrl subsystem
[    1.203212] NET: Registered protocol family 16
[    1.203846] DMA: preallocated 256 KiB pool for atomic coherent
allocations
[    1.204397] cpuidle: using governor ladder
[    1.204462] hw-breakpoint: found 5 (+1 reserved) breakpoint and 1
watchpoint registers.
[    1.204469] hw-breakpoint: maximum watchpoint size is 4 bytes.
[    1.204598] mvebu-pmsu: CPU hotplug support is currently broken on
Armada 38x: disabling
[    1.204608] mvebu-pmsu: CPU idle is currently broken on Armada 38x:
disabling
[    1.240390] SCSI subsystem initialized
[    1.260188] clocksource: Switched to clocksource arm_global_timer
[    1.286316] NET: Registered protocol family 2
[    1.286687] TCP established hash table entries: 8192 (order: 3, 32768
bytes)
[    1.286746] TCP bind hash table entries: 8192 (order: 4, 65536 bytes)
[    1.286841] TCP: Hash tables configured (established 8192 bind 8192)
[    1.286921] UDP hash table entries: 512 (order: 2, 16384 bytes)
[    1.286959] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[    1.287074] NET: Registered protocol family 1
[    1.307361] RPC: Registered named UNIX socket transport module.
[    1.307367] RPC: Registered udp transport module.
[    1.307372] RPC: Registered tcp transport module.
[    1.307376] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    1.307513] Unpacking initramfs...
[    1.439858] Freeing initrd memory: 2656K
[    1.440285] hw perfevents: enabled with armv7_cortex_a9 PMU driver, 7
counters available
[    1.441143] workingset: timestamp_bits=30 max_order=18 bucket_order=0
[    1.452415] bounce: pool size: 64 pages
[    1.452451] Block layer SCSI generic (bsg) driver version 0.4 loaded
(major 251)
[    1.452459] io scheduler noop registered
[    1.452464] io scheduler deadline registered
[    1.452499] io scheduler cfq registered (default)
[    1.452505] io scheduler mq-deadline registered
[    1.452510] io scheduler kyber registered
[    1.453243] armada-38x-pinctrl f1018000.pinctrl: registered pinctrl
driver
[    1.454825] mvebu-pcie soc:pcie: PCI host bridge to bus 0000:00
[    1.454837] pci_bus 0000:00: root bus resource [io 0x1000-0xfffff]
[    1.454845] pci_bus 0000:00: root bus resource [mem
0xe0000000-0xe7ffffff]
[    1.454852] pci_bus 0000:00: root bus resource [bus 00-ff]
[    1.455028] PCI: bus0: Fast back to back transfers disabled
[    1.455037] pci 0000:00:01.0: bridge configuration invalid ([bus
00-00]), reconfiguring
[    1.455102] PCI: bus1: Fast back to back transfers enabled
[    1.455129] pci 0000:00:01.0: PCI bridge to [bus 01]
[    1.455456] mv_xor f1060800.xor: Marvell shared XOR driver
[    1.510678] mv_xor f1060800.xor: Marvell XOR (Descriptor Mode): ( xor
cpy intr )
[    1.510833] mv_xor f1060900.xor: Marvell shared XOR driver
[    1.570660] mv_xor f1060900.xor: Marvell XOR (Descriptor Mode): ( xor
cpy intr )
[    1.594127] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[    1.595218] console [ttyS0] disabled
[    1.615355] f1012000.serial: ttyS0 at MMIO 0xf1012000 (irq = 22,
base_baud = 15625000) is a 16550A
[    2.284175] console [ttyS0] enabled
[    2.288684] pxa3xx-nand f10d0000.flash: This platform can't do DMA on
this device
[    2.296924] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda
[    2.303311] nand: Micron MT29F2G08ABAEAH4
[    2.307334] nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048,
OOB size: 64
[    2.314939] pxa3xx-nand f10d0000.flash: ECC strength 16, ECC step
size 2048
[    2.321936] Scanning device for bad blocks
[    2.530193] pxa3xx-nand f10d0000.flash: Wait time out!!!
[    2.740191] pxa3xx-nand f10d0000.flash: Wait time out!!!
[    2.950191] pxa3xx-nand f10d0000.flash: Wait time out!!!
[    3.160192] pxa3xx-nand f10d0000.flash: Wait time out!!!
[    3.370191] pxa3xx-nand f10d0000.flash: Wait time out!!!
[    3.580191] pxa3xx-nand f10d0000.flash: Wait time out!!!
[    3.790191] pxa3xx-nand f10d0000.flash: Wait time out!!!
[    4.000191] pxa3xx-nand f10d0000.flash: Wait time out!!!
[    4.210191] pxa3xx-nand f10d0000.flash: Wait time out!!!
[    4.420191] pxa3xx-nand f10d0000.flash: Wait time out!!!
...

Miquel RAYNAL

2017-11-28 13:30:55 UTC

Hi Sean,

Post by Miquel RAYNAL
Also, what kernel are you using ?

4.14.0 :-)

Good !

Post by Sean NyekjÃ¦r
[ 2.288684] pxa3xx-nand f10d0000.flash: This platform can't do DMA
on this device

FYI, this is normal, the NAND controller does not have any DMA feature
on Armada 38x (NFCv2).

Post by Sean NyekjÃ¦r
0xda [ 2.303311] nand: Micron MT29F2G08ABAEAH4
2048, OOB size: 64
[ 2.314939] pxa3xx-nand f10d0000.flash: ECC strength 16, ECC step
size 2048

In theory, Marvell NAND flash controller does support 16-bit strength
per 512 bytes over 2048 bytes pages. However, this controller driver
(pxa3xx_nand) does not. See [1] for the supported configurations.

The ECC strength shown here is probably the best to use with this type
of NAND device but I suggest you try with 4b/512B by using these two
properties like in [2]:

nand-ecc-strength = <4>;
nand-ecc-step-size = <512>;

Thanks,
Miquèl

[1]
http://elixir.free-electrons.com/linux/v4.14/source/drivers/mtd/nand/pxa3xx_nand.c#L1575

[2]
http://elixir.free-electrons.com/linux/v4.14/source/arch/arm/boot/dts/armada-385-db-ap.dts#L172

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Linux MTD discussion mailing list

Sean Nyekjær

2017-11-28 13:42:46 UTC

Hi Miquel

Post by Miquel RAYNAL
Hi Sean,

Post by Miquel RAYNAL
Also, what kernel are you using ?

4.14.0 :-)

Good !

Post by Sean NyekjÃ¦r
[ 2.288684] pxa3xx-nand f10d0000.flash: This platform can't do DMA
on this device

FYI, this is normal, the NAND controller does not have any DMA feature
on Armada 38x (NFCv2).

Post by Sean NyekjÃ¦r
0xda [ 2.303311] nand: Micron MT29F2G08ABAEAH4
2048, OOB size: 64
[ 2.314939] pxa3xx-nand f10d0000.flash: ECC strength 16, ECC step
size 2048

My dts iscreated with great inspiration from the armada-385-dp-ap.dts

&nand {
        status = "okay";
        pinctrl-names = "default";
        pinctrl-0 = <&nand_pins>, <&nand_rb>;
        num-cs = <1>;
        nand-on-flash-bbt;
        nand-ecc-strength = <4>;
        nand-ecc-step-size = <512>;
};

Why does the driver not set these values?
(I only see the timeouts if I remove the nand-on-flash-bbt)

Post by Miquel RAYNAL
Thanks,
Miquèl
[1]
http://elixir.free-electrons.com/linux/v4.14/source/drivers/mtd/nand/pxa3xx_nand.c#L1575
[2]
http://elixir.free-electrons.com/linux/v4.14/source/arch/arm/boot/dts/armada-385-db-ap.dts#L172

______________________________________________________
Linux MTD discussion mailing list

Miquel RAYNAL

2017-11-28 14:04:17 UTC

Hi Sean,

Post by Sean NyekjÃ¦r
[ 2.314939] pxa3xx-nand f10d0000.flash: ECC strength 16, ECC
step size 2048

My dts iscreated with great inspiration from the armada-385-dp-ap.dts
&nand {
        status = "okay";
        pinctrl-names = "default";
        pinctrl-0 = <&nand_pins>, <&nand_rb>;
        num-cs = <1>;
        nand-on-flash-bbt;
        nand-ecc-strength = <4>;
        nand-ecc-step-size = <512>;
};

Just for testing purpose, could you also put the keep-config and
enable-arbiter properties ?

Post by Sean NyekjÃ¦r
Why does the driver not set these values?

Perhaps you can add traces there [3] and see where it fails?

[3]
http://elixir.free-electrons.com/linux/v4.14/source/drivers/mtd/nand/pxa3xx_nand.c#L1721

Post by Sean NyekjÃ¦r
(I only see the timeouts if I remove the nand-on-flash-bbt)

The nand-on-flash-bbt will read some of the last pages in you NAND chip
where a bad block table is supposed to be and derive from that
whether a block is bad or not. So this does only one read. I guess you
should have at least one timeout there?

Without this property, the NAND core will read every bad block marker
(a few bytes at the beginning of the OOB area) and detect if the block
was marked bad. Each access seems to produce a timeout, hence the big
amount of errors you see.

Thanks,
Miquèl

Sean Nyekjær

2017-11-29 07:14:57 UTC

Post by Miquel RAYNAL
Hi Sean,

Post by Sean NyekjÃ¦r
[ 2.314939] pxa3xx-nand f10d0000.flash: ECC strength 16, ECC
step size 2048

My dts iscreated with great inspiration from the armada-385-dp-ap.dts
&nand {
        status = "okay";
        pinctrl-names = "default";
        pinctrl-0 = <&nand_pins>, <&nand_rb>;
        num-cs = <1>;
        nand-on-flash-bbt;
        nand-ecc-strength = <4>;
        nand-ecc-step-size = <512>;
};

Just for testing purpose, could you also put the keep-config and
enable-arbiter properties ?

Yes, but i don't think the arbiter have any affect in the nand controller.
Bit 12 in NDCR register is marked reserved in the datasheet.

Post by Sean NyekjÃ¦r
Why does the driver not set these values?

Perhaps you can add traces there [3] and see where it fails?
[3]
http://elixir.free-electrons.com/linux/v4.14/source/drivers/mtd/nand/pxa3xx_nand.c#L1721

See here [4] the driver is selecting 16 bit strength when we are
specifying 4 bits in the dts.

[4]
http://elixir.free-electrons.com/linux/v4.14/source/drivers/mtd/nand/pxa3xx_nand.c#L1595

Post by Sean NyekjÃ¦r
(I only see the timeouts if I remove the nand-on-flash-bbt)

Maybe, but the flash is fine we are running a rootfs in the NAND chip.

Post by Miquel RAYNAL
Without this property, the NAND core will read every bad block marker
(a few bytes at the beginning of the OOB area) and detect if the block
was marked bad. Each access seems to produce a timeout, hence the big
amount of errors you see.

in the old thread I linked, they had the same issue and like me only
when scanning for
bad blocks.

/Sean

Miquel RAYNAL

2017-11-29 08:03:05 UTC

Hi Sean,

Post by Sean NyekjÃ¦r
[ 2.314939] pxa3xx-nand f10d0000.flash: ECC strength 16, ECC
step size 2048

My dts iscreated with great inspiration from the
armada-385-dp-ap.dts
&nand {
        status = "okay";
        pinctrl-names = "default";
        pinctrl-0 = <&nand_pins>, <&nand_rb>;
        num-cs = <1>;
        nand-on-flash-bbt;
        nand-ecc-strength = <4>;
        nand-ecc-step-size = <512>;
};

Just for testing purpose, could you also put the keep-config and
enable-arbiter properties ?

Yes, but i don't think the arbiter have any affect in the nand
controller. Bit 12 in NDCR register is marked reserved in the
datasheet.

Be careful with that. I recently enabled 64-bit platforms featuring
this NAND controller. After hours of digging because it was not
working, I set this bit by adding this property like in any other device
tree and it worked. I am not telling that it will solve your issue,
mostly not, but this is something you should be careful about.

Post by Sean NyekjÃ¦r
Why does the driver not set these values?

Perhaps you can add traces there [3] and see where it fails?
[3]
http://elixir.free-electrons.com/linux/v4.14/source/drivers/mtd/nand/pxa3xx_nand.c#L1721

See here [4] the driver is selecting 16 bit strength when we are
specifying 4 bits in the dts.

That is right.

Post by Sean NyekjÃ¦r
[4]
http://elixir.free-electrons.com/linux/v4.14/source/drivers/mtd/nand/pxa3xx_nand.c#L1595

Post by Sean NyekjÃ¦r
(I only see the timeouts if I remove the nand-on-flash-bbt)

Maybe, but the flash is fine we are running a rootfs in the NAND chip.

So you can safely use the content of the NAND chip? Without any timeout
neither with reads nor writes? Can you try the mtd-utils from [5]:
nanddump/nandwrite or nandpagetest?

Also, can you isolate the line that produces the timeouts?

[5] http://www.linux-mtd.infradead.org/

Post by Miquel RAYNAL
Without this property, the NAND core will read every bad block
marker (a few bytes at the beginning of the OOB area) and detect if
the block was marked bad. Each access seems to produce a timeout,
hence the big amount of errors you see.

in the old thread I linked, they had the same issue and like me only
when scanning for
bad blocks.
/Sean

Sean Nyekjær

2017-11-30 12:00:37 UTC

Hi Miquel

Post by Sean NyekjÃ¦r
Yes, but i don't think the arbiter have any affect in the nand
controller. Bit 12 in NDCR register is marked reserved in the
datasheet.

I have tried with arbiter enabled, no different behaviour observed.

Post by Sean NyekjÃ¦r
(I only see the timeouts if I remove the nand-on-flash-bbt)

Maybe, but the flash is fine we are running a rootfs in the NAND chip.

So you can safely use the content of the NAND chip? Without any timeout
nanddump/nandwrite or nandpagetest?
Also, can you isolate the line that produces the timeouts?
[5]http://www.linux-mtd.infradead.org/

Yes the NAND chip is working fine and stores our data.

It is the command NAND_CMD_READOOB that causes it to timeout.

Here is a dump (booting with bbt enabled):
***@output-module:~# nanddump -oa /dev/mtd1
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 8
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x0ff00000...
[ 984.580213] pxa3xx-nand f10d0000.flash: Wait time out!!!
[ 984.790195] pxa3xx-nand f10d0000.flash: Wait time out!!!
[ 985.000195] pxa3xx-nand f10d0000.flash: Wait time out!!!

/Sean

Miquel RAYNAL

2017-11-30 17:18:47 UTC

Hi Sean,

+Boris (NAND maintainer).

Post by Sean NyekjÃ¦r
Yes, but i don't think the arbiter have any affect in the nand
controller. Bit 12 in NDCR register is marked reserved in the
datasheet.

Be careful with that. I recently enabled 64-bit platforms featuring
this NAND controller. After hours of digging because it was not
working, I set this bit by adding this property like in any other
device tree and it worked. I am not telling that it will solve your
issue, mostly not, but this is something you should be careful
about.

I have tried with arbiter enabled, no different behaviour observed.

Ok.

Post by Sean NyekjÃ¦r
(I only see the timeouts if I remove the nand-on-flash-bbt)

Maybe, but the flash is fine we are running a rootfs in the NAND chip.

So you can safely use the content of the NAND chip? Without any
timeout neither with reads nor writes? Can you try the mtd-utils
from [5]: nanddump/nandwrite or nandpagetest?
Also, can you isolate the line that produces the timeouts?
[5]http://www.linux-mtd.infradead.org/

Yes the NAND chip is working fine and stores our data.
It is the command NAND_CMD_READOOB that causes it to timeout.

Ok, I had a look at the nand_cmdfunc() function which is, I suppose,
the one that is in use (because you are using 2k pages) but I could
not see anything obvious. Is your setup special in some way?

Could you enable dynamic debug by adding "#define DEBUG" *before* all
#includes at the top of the pxa3xx_nand.c driver? It should display all
register accesses. Also, can you read the content of NDCR and NDSR when
it timeouts?

Thanks,
Miquèl

Sean Nyekjær

2017-11-30 18:13:17 UTC

Post by Sean NyekjÃ¦r
(I only see the timeouts if I remove the nand-on-flash-bbt)

Maybe, but the flash is fine we are running a rootfs in the NAND chip.

So you can safely use the content of the NAND chip? Without any
timeout neither with reads nor writes? Can you try the mtd-utils
from [5]: nanddump/nandwrite or nandpagetest?
Also, can you isolate the line that produces the timeouts?
[5]http://www.linux-mtd.infradead.org/

Yes the NAND chip is working fine and stores our data.
It is the command NAND_CMD_READOOB that causes it to timeout.

Ok, I had a look at the nand_cmdfunc() function which is, I suppose,
the one that is in use (because you are using 2k pages) but I could
not see anything obvious. Is your setup special in some way?

Yes it's nand_cmdfunc()
No a clean 4.14.0 kernel with a custom dts.

Post by Miquel RAYNAL
Could you enable dynamic debug by adding "#define DEBUG" *before* all
#includes at the top of the pxa3xx_nand.c driver? It should display all
register accesses. Also, can you read the content of NDCR and NDSR when
it timeouts?

[   32.765604] pxa3xx-nand f10d0000.flash: pxa3xx_nand_start():605
nand_writel(0x1, 0x0028)
[   32.765609] pxa3xx-nand f10d0000.flash: pxa3xx_nand_start():625
nand_writel(0xfff, 0x0014)
[   32.765614] pxa3xx-nand f10d0000.flash: pxa3xx_nand_start():626
nand_writel(0x0, 0x0000)
[   32.765620] pxa3xx-nand f10d0000.flash: pxa3xx_nand_start():627
nand_writel(0xd1078000, 0x0000)
[   32.765627] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():824
nand_readl(0x0014) = 0x1
[   32.765632] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():874
nand_writel(0x1, 0x0014)
[   32.765637] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():888
nand_writel(0xd3000, 0x0048)
[   32.765643] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():889
nand_writel(0x2060000, 0x0048)
[   32.765648] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():890
nand_writel(0x0, 0x0048)
[   32.765653] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():894
nand_writel(0x0, 0x0048)
[   32.765677] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():824
nand_readl(0x0014) = 0x800
[   32.765682] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():874
nand_writel(0x800, 0x0014)
[   32.765797] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():824
nand_readl(0x0014) = 0x2
[   32.765886] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq_thread():804
nand_writel(0x6, 0x0014)
[   32.765893] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():824
nand_readl(0x0014) = 0x500
[   32.765899] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():874
nand_writel(0x500, 0x0014)
[   32.765950] pxa3xx-nand f10d0000.flash: pxa3xx_nand_start():609
nand_writel(0x0, 0x0028)
[   32.765956] pxa3xx-nand f10d0000.flash: pxa3xx_nand_start():625
nand_writel(0xfff, 0x0014)
[   32.765961] pxa3xx-nand f10d0000.flash: pxa3xx_nand_start():626
nand_writel(0x0, 0x0000)
[   32.765966] pxa3xx-nand f10d0000.flash: pxa3xx_nand_start():627
nand_writel(0x91078000, 0x0000)
[   32.765974] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():824
nand_readl(0x0014) = 0x1
[   32.765979] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():874
nand_writel(0x1, 0x0014)
[   32.765984] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():888
nand_writel(0xd3000, 0x0048)
[   32.765989] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():889
nand_writel(0x2060000, 0x0048)
[   32.765994] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():890
nand_writel(0x0, 0x0048)
[   32.766000] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():894
nand_writel(0x0, 0x0048)
[   32.766022] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():824
nand_readl(0x0014) = 0x800
[   32.766028] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():874
nand_writel(0x800, 0x0014)
[   32.766143] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():824
nand_readl(0x0014) = 0x2
[   32.766233] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq_thread():804
nand_writel(0x6, 0x0014)
[   32.970203] pxa3xx-nand f10d0000.flash: Wait time out!!!
*[   32.975535] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():636
nand_readl(0x0014) = 0x0*
*[   32.975540] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():637
nand_readl(0x0000) = 0x91078000*
[   32.975546] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():639
nand_readl(0x0000) = 0x91078000
[   32.975552] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():639
nand_readl(0x0000) = 0x91078000
[   32.975559] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():639
nand_readl(0x0000) = 0x91078000
[   32.975565] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():639
nand_readl(0x0000) = 0x91078000
[   32.975572] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():645
nand_writel(0x81078000, 0x0000)
[   32.975577] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():651
nand_writel(0xfff, 0x0014)

I think I got one whole timeout sequence here :-)
Register 0x0014 is NDSR and reg 0x0000 is NDCR, I have added a read of the
NDSR register in the pxa3xx_nand_stop routine as highlighted above.
It pussles me that the nand_start is called two times before
the timeout, maybe it's okay.

/Sean

______________________________________________________
Linux MTD discussion mailing list

Miquel RAYNAL

2017-12-01 08:15:39 UTC

Post by Sean NyekjÃ¦r
(I only see the timeouts if I remove the nand-on-flash-bbt)

Maybe, but the flash is fine we are running a rootfs in the NAND chip.

So you can safely use the content of the NAND chip? Without any
timeout neither with reads nor writes? Can you try the mtd-utils
from [5]: nanddump/nandwrite or nandpagetest?
Also, can you isolate the line that produces the timeouts?
[5]http://www.linux-mtd.infradead.org/

Yes the NAND chip is working fine and stores our data.
It is the command NAND_CMD_READOOB that causes it to timeout.

Ok, I had a look at the nand_cmdfunc() function which is, I suppose,
the one that is in use (because you are using 2k pages) but I could
not see anything obvious. Is your setup special in some way?

Yes it's nand_cmdfunc()
No a clean 4.14.0 kernel with a custom dts.

Post by Miquel RAYNAL
Could you enable dynamic debug by adding "#define DEBUG" *before*
all #includes at the top of the pxa3xx_nand.c driver? It should
display all register accesses. Also, can you read the content of
NDCR and NDSR when it timeouts?

This is a write command request.

Post by Sean NyekjÃ¦r
[ 32.765627] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():824
nand_readl(0x0014) = 0x1
[ 32.765632] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():874
nand_writel(0x1, 0x0014)

The command is ready to be written in NDCB* registers (0x48).

Post by Sean NyekjÃ¦r
[   32.765637] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():888
nand_writel(0xd3000, 0x0048)
[   32.765643] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():889
nand_writel(0x2060000, 0x0048)
[   32.765648] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():890
nand_writel(0x0, 0x0048)
[   32.765653] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():894
nand_writel(0x0, 0x0048)

"Command" registers are set:
- READ0/READSTART commands (double byte command)
- 5 address cycles: column is 0, page is 0x206 which is weird if this
is a READOOB operation, where column should be something like 0x800
(mtd->writesize).

Post by Sean NyekjÃ¦r
[   32.765677] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():824
nand_readl(0x0014) = 0x800
[   32.765682] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():874
nand_writel(0x800, 0x0014)
[   32.765797] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():824
nand_readl(0x0014) = 0x2
pxa3xx_nand_irq_thread():804 nand_writel(0x6, 0x0014)

Read data request received, the FIFO may be drawn.

Post by Sean NyekjÃ¦r
[   32.765893] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():824
nand_readl(0x0014) = 0x500
[   32.765899] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():874
nand_writel(0x500, 0x0014)
[   32.765950] pxa3xx-nand f10d0000.flash: pxa3xx_nand_start():609
nand_writel(0x0, 0x0028)
[   32.765956] pxa3xx-nand f10d0000.flash: pxa3xx_nand_start():625
nand_writel(0xfff, 0x0014)

Command done received, it means data was read correctly.

And this is the start of another "action".

Post by Sean NyekjÃ¦r
[   32.765961] pxa3xx-nand f10d0000.flash: pxa3xx_nand_start():626
nand_writel(0x0, 0x0000)
[   32.765966] pxa3xx-nand f10d0000.flash: pxa3xx_nand_start():627
nand_writel(0x91078000, 0x0000)
[   32.765974] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():824
nand_readl(0x0014) = 0x1
[   32.765979] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():874
nand_writel(0x1, 0x0014)

Same as before, command is ready to be written, single difference is
the use of the HW ECC engine. But, a few lines earlier, 0 was written
to NDECCCTRL (0x28), disabling BCH, which is weird because there we
will do an operation under Hamming ECC engine.

Post by Sean NyekjÃ¦r
[   32.765984] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():888
nand_writel(0xd3000, 0x0048)
[   32.765989] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():889
nand_writel(0x2060000, 0x0048)
[   32.765994] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():890
nand_writel(0x0, 0x0048)
[   32.766000] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():894
nand_writel(0x0, 0x0048)

Same read operation as before.

Post by Sean NyekjÃ¦r
[   32.766022] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():824
nand_readl(0x0014) = 0x800
[   32.766028] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():874
nand_writel(0x800, 0x0014)
[   32.766143] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():824
nand_readl(0x0014) = 0x2
pxa3xx_nand_irq_thread():804 nand_writel(0x6, 0x0014)

Read data request received, I guess there is some ioread32_rep here

Post by Sean NyekjÃ¦r
[ 32.970203] pxa3xx-nand f10d0000.flash: Wait time out!!!

Next lines are the error path.

Post by Sean NyekjÃ¦r
*[   32.975535] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():636
nand_readl(0x0014) = 0x0*
*[   32.975540] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():637
nand_readl(0x0000) = 0x91078000*
[   32.975546] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():639
nand_readl(0x0000) = 0x91078000
[   32.975552] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():639
nand_readl(0x0000) = 0x91078000
[   32.975559] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():639
nand_readl(0x0000) = 0x91078000
[   32.975565] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():639
nand_readl(0x0000) = 0x91078000
[   32.975572] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():645
nand_writel(0x81078000, 0x0000)
[   32.975577] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():651
nand_writel(0xfff, 0x0014)
I think I got one whole timeout sequence here :-)
Register 0x0014 is NDSR and reg 0x0000 is NDCR, I have added a read
of the NDSR register in the pxa3xx_nand_stop routine as highlighted
above. It pussles me that the nand_start is called two times before
the timeout, maybe it's okay.

Can you add traces there [1] to see which path is used ?

[1]
http://elixir.free-electrons.com/linux/latest/source/drivers/mtd/nand/pxa3xx_nand.c#L669

Thanks,
Miquèl

--
Miquel Raynal, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

Sean Nyekjær

2017-12-01 08:54:20 UTC

Post by Miquel RAYNAL
Can you add traces there [1] to see which path is used ?
[1]
http://elixir.free-electrons.com/linux/latest/source/drivers/mtd/nand/pxa3xx_nand.c#L669

I have inserted trace in drain_fifo:
Line 672 right at the top
Line 677 inside "if (info->ecc_bch)"
Line 687 in the while loop
Line 702 just before ioread32_rep

[   37.356209] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():827
nand_readl(0x0014) = 0x1
[   37.356214] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():877
nand_writel(0x1, 0x0014)
[   37.356219] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():891
nand_writel(0xd3000, 0x0048)
[   37.356224] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():892
nand_writel(0x2040000, 0x0048)
[   37.356228] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():893
nand_writel(0x0, 0x0048)
[   37.356233] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():897
nand_writel(0x0, 0x0048)
[   37.356256] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():827
nand_readl(0x0014) = 0x800
[   37.356261] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():877
nand_writel(0x800, 0x0014)
[   37.356376] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():827
nand_readl(0x0014) = 0x2
[   37.356386] pxa3xx-nand f10d0000.flash: drain_fifo():672
[   37.356390] pxa3xx-nand f10d0000.flash: drain_fifo():677
[   37.356394] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356400] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356405] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356410] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356415] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356420] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356425] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356430] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356435] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356440] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356446] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356451] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356456] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356461] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356466] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356471] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356476] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356481] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356486] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356491] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356497] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356502] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356507] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356512] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356517] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356522] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356527] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356532] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356537] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356542] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356548] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356553] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356558] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356563] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356568] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356573] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356578] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356583] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356588] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356593] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356598] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356604] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356609] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356614] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356619] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356624] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356629] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356634] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356639] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356644] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356650] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356655] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356660] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356665] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356670] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356675] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356680] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356685] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356690] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356695] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356700] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356705] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356711] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356716] pxa3xx-nand f10d0000.flash: drain_fifo():702
[   37.356721] pxa3xx-nand f10d0000.flash: drain_fifo():672
[   37.356725] pxa3xx-nand f10d0000.flash: drain_fifo():677
[   37.356728] pxa3xx-nand f10d0000.flash: drain_fifo():702
[   37.356734] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq_thread():807
nand_writel(0x6, 0x0014)
[   37.560189] pxa3xx-nand f10d0000.flash: Wait time out!!!
[   37.565521] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():636
nand_readl(0x0000) = 0x91078000

Thanks
/Sean

Miquel RAYNAL

2017-12-07 20:38:14 UTC

Hi Sean,

Post by Miquel RAYNAL
Can you add traces there [1] to see which path is used ?
[1]
http://elixir.free-electrons.com/linux/latest/source/drivers/mtd/nand/pxa3xx_nand.c#L669

Line 672 right at the top
Line 677 inside "if (info->ecc_bch)"
Line 687 in the while loop
Line 702 just before ioread32_rep
[   37.356209] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():827
nand_readl(0x0014) = 0x1
[   37.356214] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():877
nand_writel(0x1, 0x0014)
[   37.356219] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():891
nand_writel(0xd3000, 0x0048)
[   37.356224] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():892
nand_writel(0x2040000, 0x0048)
[   37.356228] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():893
nand_writel(0x0, 0x0048)
[   37.356233] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():897
nand_writel(0x0, 0x0048)
[   37.356256] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():827
nand_readl(0x0014) = 0x800
[   37.356261] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():877
nand_writel(0x800, 0x0014)
[   37.356376] pxa3xx-nand f10d0000.flash: pxa3xx_nand_irq():827
nand_readl(0x0014) = 0x2
[   37.356386] pxa3xx-nand f10d0000.flash: drain_fifo():672
[   37.356390] pxa3xx-nand f10d0000.flash: drain_fifo():677
[   37.356394] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356400] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356405] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356410] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356415] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356420] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356425] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356430] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356435] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356440] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356446] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356451] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356456] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356461] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356466] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356471] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356476] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356481] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356486] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356491] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356497] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356502] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356507] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356512] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356517] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356522] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356527] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356532] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356537] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356542] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356548] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356553] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356558] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356563] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356568] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356573] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356578] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356583] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356588] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356593] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356598] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356604] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356609] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356614] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356619] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356624] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356629] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356634] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356639] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356644] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356650] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356655] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356660] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356665] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356670] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356675] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356680] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356685] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356690] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356695] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356700] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356705] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356711] pxa3xx-nand f10d0000.flash: drain_fifo():687
[   37.356716] pxa3xx-nand f10d0000.flash: drain_fifo():702
[   37.356721] pxa3xx-nand f10d0000.flash: drain_fifo():672
[   37.356725] pxa3xx-nand f10d0000.flash: drain_fifo():677
[   37.356728] pxa3xx-nand f10d0000.flash: drain_fifo():702
pxa3xx_nand_irq_thread():807 nand_writel(0x6, 0x0014)
[   37.560189] pxa3xx-nand f10d0000.flash: Wait time out!!!
[   37.565521] pxa3xx-nand f10d0000.flash: pxa3xx_nand_stop():636
nand_readl(0x0000) = 0x91078000

I had a look at the traces you provided, but I could not find a
plausible explanation for the timeouts.

As you may know, I am actively working on a new interface in the NAND
core called ->exec_op() (see [1] and [2]) and the first driver to
implement this interface is a rework of pxa3xx_nand.c renamed
marvell_nand.c (see [3]).

May I suggest you to test these changes and report me if it fails? I
prepared a branch ready to be tested (just add your own device tree),
available on my Github at [4].

If you have failures, it would be great to enable dynamic debug in the
core (put #define DEBUG before all #includes in
drivers/mtd/nand/nand_core.c) and report on the mailing list what you
get. Otherwise, you may stack this commits on top of your branch, or
wait for 4.16 to be released (hopefully).

Thanks,
Miquèl

[1] https://www.spinics.net/lists/arm-kernel/msg619633.html
[2] http://lists.infradead.org/pipermail/linux-mtd/2017-December/077965.html
[3] http://lists.infradead.org/pipermail/linux-mtd/2017-December/077973.html
[4] https://github.com/miquelraynal/linux/tree/marvell/nand-next/nfc-rework

Sean Nyekjær

2017-12-08 09:04:36 UTC

Hi Miquel

Post by Miquel RAYNAL
As you may know, I am actively working on a new interface in the NAND
core called ->exec_op() (see [1] and [2]) and the first driver to
implement this interface is a rework of pxa3xx_nand.c renamed
marvell_nand.c (see [3]).
May I suggest you to test these changes and report me if it fails? I
prepared a branch ready to be tested (just add your own device tree),
available on my Github at [4].
If you have failures, it would be great to enable dynamic debug in the
core (put #define DEBUG before all #includes in
drivers/mtd/nand/nand_core.c) and report on the mailing list what you
get. Otherwise, you may stack this commits on top of your branch, or
wait for 4.16 to be released (hopefully).
Thanks,
Miquèl
[1] https://www.spinics.net/lists/arm-kernel/msg619633.html
[2] http://lists.infradead.org/pipermail/linux-mtd/2017-December/077965.html
[3] http://lists.infradead.org/pipermail/linux-mtd/2017-December/077973.html
[4] https://github.com/miquelraynal/linux/tree/marvell/nand-next/nfc-rework

Thanks I didn't know about that :-)

I had a look at it and I have rebased my stuff on top of your branch.
I have edited my devicetree to look like this:
&nand_controller {
    status = "okay";
    pinctrl-names = "default";
    pinctrl-0 = <&nand_pins>, <&nand_rb>;

    ***@0 {
        reg = <0>;
        label = "pxa3xx_nand-0";
        marvell,rb = <0>;
        marvell,nand-keep-config;
        nand-on-flash-bbt;
        nand-ecc-strength = <4>;
        nand-ecc-step-size = <512>;
    };
};

It produces a lot of bad eraseblocks entrys
[    2.693343] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda
[    2.699717] nand: Micron MT29F2G08ABAEAH4
[    2.703772] nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048,
OOB size: 64
[    2.714286] Bad block table not found for chip 0
[    2.721509] Bad block table not found for chip 0
[    2.726139] Scanning device for bad blocks
[    2.730583] Bad eraseblock 0 at 0x000000000000
[    2.735365] Bad eraseblock 1 at 0x000000020000
[    2.740145] Bad eraseblock 2 at 0x000000040000
[    2.744934] Bad eraseblock 3 at 0x000000060000
[    2.749714] Bad eraseblock 4 at 0x000000080000

Is my devicetree correct?

Br
/Sean

Miquel RAYNAL

2017-12-08 09:21:48 UTC

Hi Sean,

Post by Miquel RAYNAL
As you may know, I am actively working on a new interface in the
NAND core called ->exec_op() (see [1] and [2]) and the first driver
to implement this interface is a rework of pxa3xx_nand.c renamed
marvell_nand.c (see [3]).
May I suggest you to test these changes and report me if it fails? I
prepared a branch ready to be tested (just add your own device
tree), available on my Github at [4].
If you have failures, it would be great to enable dynamic debug in
the core (put #define DEBUG before all #includes in
drivers/mtd/nand/nand_core.c) and report on the mailing list what
you get. Otherwise, you may stack this commits on top of your
branch, or wait for 4.16 to be released (hopefully).
Thanks,
Miquèl
[1] https://www.spinics.net/lists/arm-kernel/msg619633.html
[2]
http://lists.infradead.org/pipermail/linux-mtd/2017-December/077965.html
[3]
http://lists.infradead.org/pipermail/linux-mtd/2017-December/077973.html
[4]
https://github.com/miquelraynal/linux/tree/marvell/nand-next/nfc-rework

Thanks I didn't know about that :-)
I had a look at it and I have rebased my stuff on top of your branch.
&nand_controller {
    status = "okay";
    pinctrl-names = "default";
    pinctrl-0 = <&nand_pins>, <&nand_rb>;
        reg = <0>;
        label = "pxa3xx_nand-0";
        marvell,rb = <0>;
        marvell,nand-keep-config;
        nand-on-flash-bbt;
        nand-ecc-strength = <4>;
        nand-ecc-step-size = <512>;
    };
};
It produces a lot of bad eraseblocks entrys
0xda [    2.699717] nand: Micron MT29F2G08ABAEAH4
2048, OOB size: 64
[    2.714286] Bad block table not found for chip 0
[    2.721509] Bad block table not found for chip 0
[    2.726139] Scanning device for bad blocks
[    2.730583] Bad eraseblock 0 at 0x000000000000
[    2.735365] Bad eraseblock 1 at 0x000000020000
[    2.740145] Bad eraseblock 2 at 0x000000040000
[    2.744934] Bad eraseblock 3 at 0x000000060000
[    2.749714] Bad eraseblock 4 at 0x000000080000
Is my devicetree correct?

It depends:
- Did you already use bad block tables before ?
- Is your bootloader using 4b/512B ECC strength ?

Besides:

- What filesystem are you booting? Is it UBIFS or JFFS2 or
something else?
- Did you show the 5 first bad eraseblocks only or all of them?
- Do you have good blocks ?
- Can you make use of the NAND chip after?

Thanks,
Miquèl

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Linux MTD discussion mailing list

Sean Nyekjær

2017-12-11 08:25:45 UTC

Hi Miquel,

Post by Miquel RAYNAL
Hi Sean,

Post by Sean NyekjÃ¦r
Thanks I didn't know about that :-)
I had a look at it and I have rebased my stuff on top of your branch.
&nand_controller {
    status = "okay";
    pinctrl-names = "default";
    pinctrl-0 = <&nand_pins>, <&nand_rb>;
        reg = <0>;
        label = "pxa3xx_nand-0";
        marvell,rb = <0>;
        marvell,nand-keep-config;
        nand-on-flash-bbt;
        nand-ecc-strength = <4>;
        nand-ecc-step-size = <512>;
    };
};
It produces a lot of bad eraseblocks entrys
0xda [    2.699717] nand: Micron MT29F2G08ABAEAH4
2048, OOB size: 64
[    2.714286] Bad block table not found for chip 0
[    2.721509] Bad block table not found for chip 0
[    2.726139] Scanning device for bad blocks
[    2.730583] Bad eraseblock 0 at 0x000000000000
[    2.735365] Bad eraseblock 1 at 0x000000020000
[    2.740145] Bad eraseblock 2 at 0x000000040000
[    2.744934] Bad eraseblock 3 at 0x000000060000
[    2.749714] Bad eraseblock 4 at 0x000000080000
Is my devicetree correct?

- Did you already use bad block tables before ?

Yes because if I don't i would get the timeouts described in this thread :-)

Post by Miquel RAYNAL
- Is your bootloader using 4b/512B ECC strength ?

strength 4, ecc_stepsize 512, page_size 2048 but the uboot driver sets
it to strength 16, ecc_stepsize 512, page_size 2048,
just like the current pxa3xx driver in the kernel does.

Post by Miquel RAYNAL
- What filesystem are you booting? Is it UBIFS or JFFS2 or
something else?

UBI

Post by Miquel RAYNAL
- Did you show the 5 first bad eraseblocks only or all of them?

It continues to count to:
Bad eraseblock 2047 at 0x00000ffe0000

Post by Miquel RAYNAL
- Do you have good blocks ?

Post by Miquel RAYNAL
- Can you make use of the NAND chip after?

No

Correct me if i'm wrong, but i can't find anywhere the
nand-ecc-step-size is read by the new nand driver?

/Sean

Sean Nyekjær

2017-12-11 08:45:33 UTC

Hi Miquel,

Post by Sean NyekjÃ¦r
It produces a lot of bad eraseblocks entrys
0xda [    2.699717] nand: Micron MT29F2G08ABAEAH4
2048, OOB size: 64
[    2.714286] Bad block table not found for chip 0
[    2.721509] Bad block table not found for chip 0
[    2.726139] Scanning device for bad blocks
[    2.730583] Bad eraseblock 0 at 0x000000000000
[    2.735365] Bad eraseblock 1 at 0x000000020000
[    2.740145] Bad eraseblock 2 at 0x000000040000
[    2.744934] Bad eraseblock 3 at 0x000000060000
[    2.749714] Bad eraseblock 4 at 0x000000080000

Some more tracing, boot continues with this:
[   12.939411] marvell-nfc f10d0000.nand-controller: NDCB0: 0x300d3000
[   12.939411] NDCB1: 0xff400000
[   12.939411] NDCB2: 0x00000001
[   12.939411] NDCB3: 0x00000820
[   12.939682] marvell-nfc f10d0000.nand-controller: NDCB0: 0x100ae005
[   12.939682] NDCB1: 0x00000820
[   12.939682] NDCB2: 0x00000000
[   12.939682] NDCB3: 0x00000020
[   12.939731] Bad eraseblock 2045 at 0x00000ffa0000
[   12.944462] marvell-nfc f10d0000.nand-controller: NDCB0: 0x300d3000
[   12.944462] NDCB1: 0xff800000
[   12.944462] NDCB2: 0x00000001
[   12.944462] NDCB3: 0x00000820
[   12.944731] marvell-nfc f10d0000.nand-controller: NDCB0: 0x100ae005
[   12.944731] NDCB1: 0x00000820
[   12.944731] NDCB2: 0x00000000
[   12.944731] NDCB3: 0x00000020
[   12.944781] Bad eraseblock 2046 at 0x00000ffc0000
[   12.949503] marvell-nfc f10d0000.nand-controller: NDCB0: 0x300d3000
[   12.949503] NDCB1: 0xffc00000
[   12.949503] NDCB2: 0x00000001
[   12.949503] NDCB3: 0x00000820
[   12.949771] marvell-nfc f10d0000.nand-controller: NDCB0: 0x100ae005
[   12.949771] NDCB1: 0x00000820
[   12.949771] NDCB2: 0x00000000
[   12.949771] NDCB3: 0x00000020
[   12.949821] Bad eraseblock 2047 at 0x00000ffe0000
[   12.954547] No space left to write bad block table
[   12.959353] nand_bbt: error while writing bad block table -28
[   12.965126] marvell-nfc f10d0000.nand-controller: nand_scan_tail
failed: -28
[   12.972244] marvell-nfc: probe of f10d0000.nand-controller failed
with error -28

/Sean

Miquel RAYNAL

2017-12-11 09:53:59 UTC

Hi Sean,

Post by Sean NyekjÃ¦r
I had a look at it and I have rebased my stuff on top of your
&nand_controller {
    status = "okay";
    pinctrl-names = "default";
    pinctrl-0 = <&nand_pins>, <&nand_rb>;
        reg = <0>;
        label = "pxa3xx_nand-0";
        marvell,rb = <0>;
        marvell,nand-keep-config;
        nand-on-flash-bbt;
        nand-ecc-strength = <4>;
        nand-ecc-step-size = <512>;
    };
};
It produces a lot of bad eraseblocks entrys
0xda [    2.699717] nand: Micron MT29F2G08ABAEAH4
2048, OOB size: 64
[    2.714286] Bad block table not found for chip 0
[    2.721509] Bad block table not found for chip 0
[    2.726139] Scanning device for bad blocks
[    2.730583] Bad eraseblock 0 at 0x000000000000
[    2.735365] Bad eraseblock 1 at 0x000000020000
[    2.740145] Bad eraseblock 2 at 0x000000040000
[    2.744934] Bad eraseblock 3 at 0x000000060000
[    2.749714] Bad eraseblock 4 at 0x000000080000
Is my devicetree correct?

- Did you already use bad block tables before ?

Yes because if I don't i would get the timeouts described in this thread :-)

Actually, if you look carefully to the trace behind, you are not using
the same bad block table with the bootloader ("Bad block table not
found for chip 0") so the core then reads the OOB area of every first
page for each block and looks at the first OOB bytes for the bad block
markers. If there was data there, the block will be declared as bad.

Can you please check that by using the configuration that actually
boots and use nanddump in raw mode with the OOB area (options -n and -o)
to show us the content of the first page of any block of the last NAND
MTD device?

Post by Miquel RAYNAL
- Is your bootloader using 4b/512B ECC strength ?

strength 4, ecc_stepsize 512, page_size 2048 but the uboot driver
sets it to strength 16, ecc_stepsize 512, page_size 2048,
just like the current pxa3xx driver in the kernel does.

Post by Miquel RAYNAL
- What filesystem are you booting? Is it UBIFS or JFFS2 or
something else?

UBI

Post by Miquel RAYNAL
- Did you show the 5 first bad eraseblocks only or all of them?

Bad eraseblock 2047 at 0x00000ffe0000

Post by Miquel RAYNAL
- Do you have good blocks ?

Post by Miquel RAYNAL
- Can you make use of the NAND chip after?

No
Correct me if i'm wrong, but i can't find anywhere the
nand-ecc-step-size is read by the new nand driver?

The core does (nand_scan_tail -> nand_dt_init ->
of_get_nand_ecc_step_size).

Thanks,
Miquèl

Sean Nyekjær

2017-12-11 10:20:40 UTC

Hi Miquel,

Post by Miquel RAYNAL
Actually, if you look carefully to the trace behind, you are not using
the same bad block table with the bootloader ("Bad block table not
found for chip 0") so the core then reads the OOB area of every first
page for each block and looks at the first OOB bytes for the bad block
markers. If there was data there, the block will be declared as bad.

With the new NFC driver, is the bad block table located elsewhere?
I have not done any changes to my bootloader when i did the switch to
the new driver,
so i guess it should work as before.

Post by Miquel RAYNAL
Can you please check that by using the configuration that actually
boots and use nanddump in raw mode with the OOB area (options -n and -o)
to show us the content of the first page of any block of the last NAND
MTD device?

Will do

/Sean

Sean Nyekjær

2017-12-11 11:35:21 UTC

Hi Miquel,

With the new NFC driver, is the bad block table located elsewhere?
I have not done any changes to my bootloader when i did the switch to
the new driver,
so i guess it should work as before.

Will do

Dumped from uboot:
=> nand dump.oob 0xffc0000
Page 0ffc0000 dump:
OOB:
        ff ff ff ff ff ff ff ff
        31 74 62 42 56 4d 01 ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
=> nand dump.oob 0xffe0000
Page 0ffe0000 dump:
OOB:
        ff ff ff ff ff ff ff ff
        4d 56 42 62 74 30 01 ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff

I have tried to dump some random pages, and they all contain 0xFF's.
I'll try to trace what the NFC driver is reading from the OOBs.

/Sean

Sean Nyekjær

2017-12-11 13:22:18 UTC

Hi Miquel,

With the new NFC driver, is the bad block table located elsewhere?
I have not done any changes to my bootloader when i did the switch to
the new driver,
so i guess it should work as before.

Will do

=> nand dump.oob 0xffc0000
        ff ff ff ff ff ff ff ff
        31 74 62 42 56 4d 01 ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
=> nand dump.oob 0xffe0000
        ff ff ff ff ff ff ff ff
        4d 56 42 62 74 30 01 ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
I have tried to dump some random pages, and they all contain 0xFF's.
I'll try to trace what the NFC driver is reading from the OOBs.

What function is called in the marvel_nand.c driver here [1].
From my tracing i can see:
mtd->_read_oob(mtd, from, ops);
->    marvell_nfc_hw_ecc_bch_read_oob
->        marvell_nfc_hw_ecc_bch_read_page
marvell_nfc_hw_ecc_bch_read_page is returning 0 (bitflips)
But the mtd->_read_oob is returning -74.

Some of the tracing:
[    2.947220] Scanning device for bad blocks
[    2.951334] mtd_read_oob
[    2.953874] marvell_nfc_hw_ecc_bch_read_oob
[    2.958393] marvell_nfc_hw_ecc_bch_read_page: max_bitflips: 0, page 0x0
[    2.965034] marvell_nfc_hw_ecc_bch_read_oob: returns 0
[    2.970194] mtd_read_oob: ret_code -74
[    2.983669] Bad eraseblock 0 at 0x000000000000

[1]:
https://github.com/miquelraynal/linux/blob/marvell/nand-next/nfc-rework/drivers/mtd/mtdcore.c#L1154

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Linux MTD discussion mailing lis

Miquel RAYNAL

2017-12-11 14:02:00 UTC

On Mon, 11 Dec 2017 14:22:18 +0100

Post by Sean NyekjÃ¦r
Hi Miquel,

Post by Miquel RAYNAL
Actually, if you look carefully to the trace behind, you are not
using the same bad block table with the bootloader ("Bad block
table not found for chip 0") so the core then reads the OOB area
of every first page for each block and looks at the first OOB
bytes for the bad block markers. If there was data there, the
block will be declared as bad.

With the new NFC driver, is the bad block table located elsewhere?
I have not done any changes to my bootloader when i did the switch
to the new driver,
so i guess it should work as before.

Will do

What function is called in the marvel_nand.c driver here [1].
mtd->_read_oob(mtd, from, ops);
-> marvell_nfc_hw_ecc_bch_read_oob
-> marvell_nfc_hw_ecc_bch_read_page
marvell_nfc_hw_ecc_bch_read_page is returning 0 (bitflips)
But the mtd->_read_oob is returning -74.

This means the hardware detected an ECC error (and the page was not
empty).

Post by Sean NyekjÃ¦r
[    2.947220] Scanning device for bad blocks
[    2.951334] mtd_read_oob
[    2.953874] marvell_nfc_hw_ecc_bch_read_oob
[    2.958393] marvell_nfc_hw_ecc_bch_read_page: max_bitflips: 0,
page 0x0 [    2.965034] marvell_nfc_hw_ecc_bch_read_oob: returns 0
[    2.970194] mtd_read_oob: ret_code -74
[    2.983669] Bad eraseblock 0 at 0x000000000000

This behavior is "normal", it is because the number of failure has
been incremented (probably by marvell_nfc_hw_ecc_correct()).

Can you hack the code right before this line [1] and add:
1/ A dump of both the data buffer and the oob buffer (entirely)
2/ Add a memset(mtd->oob_poi, 0xff, mtd->oobsize) conditionally until
the probe is finished (you may want to add a global boolean value that
changes its state after the nand_scan_tail() call).

Then please do a raw dump with nanddump from Linux.

Also, please try booting without the nand-keep-config property.

Thank you,
Miquèl

[1]
https://github.com/miquelraynal/linux/blob/marvell/nand-next/nfc-rework/drivers/mtd/nand/marvell_nand.c#L1351

Miquel RAYNAL

2017-12-11 14:09:29 UTC

On Mon, 11 Dec 2017 15:02:00 +0100

Post by Miquel RAYNAL
On Mon, 11 Dec 2017 14:22:18 +0100

Post by Sean NyekjÃ¦r
Hi Miquel,

Post by Miquel RAYNAL
Actually, if you look carefully to the trace behind, you are not
using the same bad block table with the bootloader ("Bad block
table not found for chip 0") so the core then reads the OOB area
of every first page for each block and looks at the first OOB
bytes for the bad block markers. If there was data there, the
block will be declared as bad.

With the new NFC driver, is the bad block table located
elsewhere? I have not done any changes to my bootloader when i
did the switch to the new driver,
so i guess it should work as before.

Post by Miquel RAYNAL
Can you please check that by using the configuration that
actually boots and use nanddump in raw mode with the OOB area
(options -n and -o)
to show us the content of the first page of any block of the
last NAND MTD device?

Will do

=> nand dump.oob 0xffc0000
        ff ff ff ff ff ff ff ff
        31 74 62 42 56 4d 01 ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
=> nand dump.oob 0xffe0000
        ff ff ff ff ff ff ff ff
        4d 56 42 62 74 30 01 ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
I have tried to dump some random pages, and they all contain
0xFF's. I'll try to trace what the NFC driver is reading from the
OOBs.

This means the hardware detected an ECC error (and the page was not
empty).

This behavior is "normal", it is because the number of failure has
been incremented (probably by marvell_nfc_hw_ecc_correct()).
1/ A dump of both the data buffer and the oob buffer (entirely)
2/ Add a memset(mtd->oob_poi, 0xff, mtd->oobsize) conditionally until
the probe is finished (you may want to add a global boolean value that
changes its state after the nand_scan_tail() call).

Instead of hacking this way, to boot until you get a prompt, you may
add this property to the nand controller node:

nand-ecc-mode = "none";

Then please use nanddump over a programmed page, including the OOB area.

Post by Miquel RAYNAL
Then please do a raw dump with nanddump from Linux.
Also, please try booting without the nand-keep-config property.
Thank you,
Miquèl
[1]
https://github.com/miquelraynal/linux/blob/marvell/nand-next/nfc-rework/drivers/mtd/nand/marvell_nand.c#L1351

--
Miquel Raynal, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

Boris Brezillon

2017-12-11 14:49:12 UTC

On Mon, 11 Dec 2017 15:09:29 +0100

Post by Miquel RAYNAL
On Mon, 11 Dec 2017 15:02:00 +0100

Post by Miquel RAYNAL
On Mon, 11 Dec 2017 14:22:18 +0100

Post by Sean NyekjÃ¦r
Hi Miquel,

Post by Miquel RAYNAL
Actually, if you look carefully to the trace behind, you are not
using the same bad block table with the bootloader ("Bad block
table not found for chip 0") so the core then reads the OOB area
of every first page for each block and looks at the first OOB
bytes for the bad block markers. If there was data there, the
block will be declared as bad.

With the new NFC driver, is the bad block table located
elsewhere? I have not done any changes to my bootloader when i
did the switch to the new driver,
so i guess it should work as before.

Post by Miquel RAYNAL
Can you please check that by using the configuration that
actually boots and use nanddump in raw mode with the OOB area
(options -n and -o)
to show us the content of the first page of any block of the
last NAND MTD device?

Will do

=> nand dump.oob 0xffc0000
        ff ff ff ff ff ff ff ff
        31 74 62 42 56 4d 01 ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
=> nand dump.oob 0xffe0000
        ff ff ff ff ff ff ff ff
        4d 56 42 62 74 30 01 ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
        ff ff ff ff ff ff ff ff
I have tried to dump some random pages, and they all contain
0xFF's. I'll try to trace what the NFC driver is reading from the
OOBs.

This means the hardware detected an ECC error (and the page was not
empty).

Instead of hacking this way, to boot until you get a prompt, you may

I guess you mean the nand node, not the nand-controller node?

Post by Miquel RAYNAL
nand-ecc-mode = "none";
Then please use nanddump over a programmed page, including the OOB area.

Sean Nyekjær

2017-12-12 08:44:43 UTC

Hi Miquel,

Post by Miquel RAYNAL
This behavior is "normal", it is because the number of failure has
been incremented (probably by marvell_nfc_hw_ecc_correct()).
1/ A dump of both the data buffer and the oob buffer (entirely)
2/ Add a memset(mtd->oob_poi, 0xff, mtd->oobsize) conditionally until
the probe is finished (you may want to add a global boolean value that
changes its state after the nand_scan_tail() call).

Instead of hacking this way, to boot until you get a prompt, you may
nand-ecc-mode = "none";
Then please use nanddump over a programmed page, including the OOB area.

Boot log:
[    2.692856] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda
[    2.699231] nand: Micron MT29F2G08ABAEAH4
[    2.703286] nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048,
OOB size: 64
[    2.711135] nand: NAND_ECC_NONE selected by board driver. This is not
recommended!
[    2.718730] nand: WARNING: pxa3xx_nand-0: the ECC used on your system
is too weak compared to the one required by the NAND chip
[    2.732632] Bad block table not found for chip 0
[    2.739609] Bad block table not found for chip 0
[    2.744250] Scanning device for bad blocks
[    2.985502] Bad block table written to 0x00000ffe0000, version 0x01
[    2.992760] Bad block table written to 0x00000ffc0000, version 0x01

Nanddump:
***@output-module:~# nanddump -oa /dev/mtd1
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 0
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x0ff00000...
UBIXS...

I guess it's safe to say something is not right with ECC enabled.

Post by Miquel RAYNAL
Then please do a raw dump with nanddump from Linux.

/Sean

Miquel RAYNAL

2017-12-12 08:51:19 UTC

Hi Sean,

On Tue, 12 Dec 2017 09:44:43 +0100

Post by Sean NyekjÃ¦r
Hi Miquel,

Post by Miquel RAYNAL
This behavior is "normal", it is because the number of failure has
been incremented (probably by marvell_nfc_hw_ecc_correct()).
1/ A dump of both the data buffer and the oob buffer (entirely)
2/ Add a memset(mtd->oob_poi, 0xff, mtd->oobsize) conditionally
until the probe is finished (you may want to add a global boolean
value that changes its state after the nand_scan_tail() call).

Instead of hacking this way, to boot until you get a prompt, you may
nand-ecc-mode = "none";
Then please use nanddump over a programmed page, including the OOB area.

0xda [    2.699231] nand: Micron MT29F2G08ABAEAH4
2048, OOB size: 64
[    2.711135] nand: NAND_ECC_NONE selected by board driver. This is
not recommended!
[    2.718730] nand: WARNING: pxa3xx_nand-0: the ECC used on your
system is too weak compared to the one required by the NAND chip
[    2.732632] Bad block table not found for chip 0
[    2.739609] Bad block table not found for chip 0
[    2.744250] Scanning device for bad blocks
[    2.985502] Bad block table written to 0x00000ffe0000, version 0x01
[    2.992760] Bad block table written to 0x00000ffc0000, version 0x01
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 0
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x0ff00000...
UBIXS...
I guess it's safe to say something is not right with ECC enabled.

Post by Miquel RAYNAL
Then please do a raw dump with nanddump from Linux.

Thanks for testing this, but I _really_ need the entire output of

nanddump -o -n -p -l 0x800 /dev/mtd1

Thank you,
Miquèl

Sean Nyekjær

2017-12-12 08:56:19 UTC

Hi Miquel,

Post by Sean NyekjÃ¦r
0xda [    2.699231] nand: Micron MT29F2G08ABAEAH4
2048, OOB size: 64
[    2.711135] nand: NAND_ECC_NONE selected by board driver. This is
not recommended!
[    2.718730] nand: WARNING: pxa3xx_nand-0: the ECC used on your
system is too weak compared to the one required by the NAND chip
[    2.732632] Bad block table not found for chip 0
[    2.739609] Bad block table not found for chip 0
[    2.744250] Scanning device for bad blocks
[    2.985502] Bad block table written to 0x00000ffe0000, version 0x01
[    2.992760] Bad block table written to 0x00000ffc0000, version 0x01
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 0
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x0ff00000...
UBIXS...
I guess it's safe to say something is not right with ECC enabled.

Post by Miquel RAYNAL
Then please do a raw dump with nanddump from Linux.

Thanks for testing this, but I _really_ need the entire output of
nanddump -o -n -p -l 0x800 /dev/mtd1

***@output-module:~# nanddump -o -n -p -l 0x800 /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00000800...
0x00000000: 55 42 49 23 01 00 00 00 00 00 00 00 00 00 00 01
0x00000010: 00 00 08 00 00 00 10 00 00 00 00 00 00 00 00 00
0x00000020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000030: 00 00 00 00 00 00 00 00 00 00 00 00 7f 58 53 19
0x00000040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000000a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000000b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000000c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000000d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000000e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000000f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000001a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000001b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000001c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000001d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000001e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000001f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000220: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000230: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000250: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000260: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000270: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000290: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000002a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000002b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000002c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000002d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000002e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000002f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000310: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000320: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000330: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000340: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000350: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000360: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000370: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000390: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000003a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000003b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000003c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000003d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000003e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000003f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000410: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000420: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000450: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000460: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000490: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000004a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000004b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000004c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000004d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000004e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000004f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000510: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000520: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000530: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000540: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000550: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000560: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000570: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000590: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000005a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000005b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000005c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000005d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000005e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000005f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000610: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000620: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000630: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000640: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000650: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000660: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000670: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000690: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000006a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000006b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000006c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000006d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000006e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000006f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000710: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000720: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000730: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000740: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000770: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00000790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000007a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000007b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000007c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000007d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000007e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x000007f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: c1 eb aa 03 d3 5c d8 ae fa fd ba 34 2a a5 20 38
OOB Data: fd 0b 22 59 c1 8c 3c a5 a4 62 df f2 d4 7e ff ff

/Sean

Miquel RAYNAL

2017-12-12 10:12:27 UTC

Hello Sean,

On Tue, 12 Dec 2017 09:56:19 +0100

Post by Sean NyekjÃ¦r
Hi Miquel,

Post by Sean NyekjÃ¦r
0xda [    2.699231] nand: Micron MT29F2G08ABAEAH4
2048, OOB size: 64
[    2.711135] nand: NAND_ECC_NONE selected by board driver. This
is not recommended!
[    2.718730] nand: WARNING: pxa3xx_nand-0: the ECC used on your
system is too weak compared to the one required by the NAND chip
[    2.732632] Bad block table not found for chip 0
[    2.739609] Bad block table not found for chip 0
[    2.744250] Scanning device for bad blocks
[    2.985502] Bad block table written to 0x00000ffe0000, version
0x01 [    2.992760] Bad block table written to 0x00000ffc0000,
version 0x01
ECC failed: 0
ECC corrected: 0
Number of bad blocks: 0
Number of bbt blocks: 0
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x0ff00000...
UBIXS...
I guess it's safe to say something is not right with ECC enabled.

Post by Miquel RAYNAL
Then please do a raw dump with nanddump from Linux.

Thanks for testing this, but I _really_ need the entire output of
nanddump -o -n -p -l 0x800 /dev/mtd1

Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x00000000 and ending at 0x00000800...

[...]

Post by Sean NyekjÃ¦r
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: c1 eb aa 03 d3 5c d8 ae fa fd ba 34 2a a5 20 38
OOB Data: fd 0b 22 59 c1 8c 3c a5 a4 62 df f2 d4 7e ff ff

This is exactly what the driver expects, an empty spare area (free OOB)
of 32B, 30B of ECC and 2B lost.

Are you sure your U-Boot does actually use the BBT?

The last two blocks (supposedly written by U-Boot) are usually declared
bad by Linux when it does not find the BBT. This is not the case, like
if the last blocks were empty.

Could you try this, still with "ecc-none" and without the
"nand-keep-config" property:

1/ From U-Boot, scrub the last 4 blocks. As your NAND is 256MiB
wide with 128kiB blocks, this should do the trick:

nand scrub 0xFF80000 0x80000

2/ At this point, U-Boot should tell you it cannot find a bad block
table, a second later it will tell you that it created it twice at the
end of the NAND chip.

3/ Boot Linux with ECC == none
4/ Dump the first page of the 4 last blocks:

nanddump -nop -l 0x800 -s <adddr> /dev/mtd1

Supposedly that /dev/mtd1 is the _last_ MTD partition of your NAND
device and <addr> being sequentially:

0xFF80000
0xFFA0000
0xFFC0000
0xFFE0000

Please copy/paste the overall trace without any cuts (including U-Boot
traces, literally everything).

Thanks for your effort,
Miquèl

Sean Nyekjær

2017-12-12 10:55:22 UTC

Hi Miquel

Post by Miquel RAYNAL
Are you sure your U-Boot does actually use the BBT?
The last two blocks (supposedly written by U-Boot) are usually declared
bad by Linux when it does not find the BBT. This is not the case, like
if the last blocks were empty.
Could you try this, still with "ecc-none" and without the

&nand_controller {
        status = "okay";
        pinctrl-names = "default";
        pinctrl-0 = <&nand_pins>, <&nand_rb>;

        ***@0 {
                reg = <0>;
                label = "pxa3xx_nand-0";
                marvell,rb = <0>;
                nand-ecc-mode = "none";
                nand-on-flash-bbt;
    };
};

Post by Miquel RAYNAL
1/ From U-Boot, scrub the last 4 blocks. As your NAND is 256MiB
nand scrub 0xFF80000 0x80000
2/ At this point, U-Boot should tell you it cannot find a bad block
table, a second later it will tell you that it created it twice at the
end of the NAND chip.

Yes uboot is recreating the bbt and after a new reset it recognise the
new bbt.

Post by Miquel RAYNAL
3/ Boot Linux with ECC == none
nanddump -nop -l 0x800 -s <adddr> /dev/mtd1

See tracing below

Post by Miquel RAYNAL
Supposedly that /dev/mtd1 is the _last_ MTD partition of your NAND
0xFF80000
0xFFA0000
0xFFC0000
0xFFE0000
Please copy/paste the overall trace without any cuts (including U-Boot
traces, literally everything).

U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)

SoC:   MV88F6810-A0 at 1066 MHz
DRAM: 1 GiB (533 MHz, 16-bit, ECC not enabled)
WDT:   Enabling Armada 385 watchdog.
NAND: PXA3xx: strength 4, ecc_stepsize 512, page_size 2048
256 MiB
Bad block table found at page 131008, version 0x01
Bad block table found at page 130944, version 0x01
Model: Triax dvb-tc output
Board: Triax dvb-tc output
Net:
Warning: ***@30000 (eth0) using random MAC address - 26:d3:56:98:ca:b4
eth0: ***@30000
=> nand scrub 0xFF80000 0x80000

NAND scrub: device 0 offset 0xff80000, size 0x80000
Warning: scrub option will erase all factory set bad blocks!
         There is no reliable way to recover them.
         Use this command only for testing purposes if you
         are sure of what you are doing!

Really scrub this NAND flash? <y/N>
y
Erasing at 0xffe0000 -- 100% complete.
OK
=> boot

Starting kernel ...

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.15.0-rc1-00094-g1791eb8f2475-dirty
(***@skn) (gcc version 7.2.0 (Arch Repository)) #30 SMP PREEMPT Tue Dec
12 09:28:30 CET 2017
...
[    2.692801] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda
[    2.699176] nand: Micron MT29F2G08ABAEAH4
[    2.703232] nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048,
OOB size: 64
[    2.710928] nand: NAND_ECC_NONE selected by board driver. This is not
recommended!
[    2.718523] nand: WARNING: pxa3xx_nand-0: the ECC used on your system
is too weak compared to the one required by the NAND chip
[    2.731429] Bad block table not found for chip 0
[    2.737384] Bad block table not found for chip 0
[    2.742024] Scanning device for bad blocks
[    2.891818] Bad block table written to 0x00000ffe0000, version 0x01
[    2.898837] Bad block table written to 0x00000ffc0000, version 0x01
[    2.905152] 2 cmdlinepart partitions found on MTD device pxa3xx_nand-0
[    2.911708] Creating 2 MTD partitions on "pxa3xx_nand-0":
[    2.917130] 0x000000000000-0x000000100000 : "uboot"
[    2.922512] 0x000000100000-0x000010000000 : "ubi0"
...
output-module login: root
Password:
***@output-module:~#
***@output-module:~# nanddump -nop -l 0x800 -s 0xFF80000 /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ff80000 and ending at 0x0ff80800...
***@output-module:~# nanddump -nop -l 0x800 -s 0xFFA0000 /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ffa0000 and ending at 0x0ffa0800...
***@output-module:~# nanddump -nop -l 0x800 -s 0xFFC0000 /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ffc0000 and ending at 0x0ffc0800...
***@output-module:~# nanddump -nop -l 0x800 -s 0xFFE0000 /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ffe0000 and ending at 0x0ffe0800...
***@output-module:~# reboot
...
U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)

SoC:   MV88F6810-A0 at 1066 MHz
DRAM: 1 GiB (533 MHz, 16-bit, ECC not enabled)
WDT:   Enabling Armada 385 watchdog.
NAND: PXA3xx: strength 4, ecc_stepsize 512, page_size 2048
256 MiB
Bad block table not found for chip 0
Bad block table not found for chip 0
Scanning device for bad blocks
Bad block table written to 0x00000ffe0000, version 0x01
Bad block table written to 0x00000ffc0000, version 0x01

If I reboot uboot is unable recognise the bbt, but recreates it. But the
kernel is scanning on every boot.
Am I doing anything wrong in the nanddump command?

/Sean

Miquel RAYNAL

2017-12-12 11:08:06 UTC

On Tue, 12 Dec 2017 11:55:22 +0100

Post by Sean NyekjÃ¦r
Hi Miquel

Post by Miquel RAYNAL
Are you sure your U-Boot does actually use the BBT?
The last two blocks (supposedly written by U-Boot) are usually
declared bad by Linux when it does not find the BBT. This is not
the case, like if the last blocks were empty.
Could you try this, still with "ecc-none" and without the

&nand_controller {
        status = "okay";
        pinctrl-names = "default";
        pinctrl-0 = <&nand_pins>, <&nand_rb>;
                reg = <0>;
                label = "pxa3xx_nand-0";
                marvell,rb = <0>;
                nand-ecc-mode = "none";
                nand-on-flash-bbt;
    };
};

Yes uboot is recreating the bbt and after a new reset it recognise
the new bbt.

Post by Miquel RAYNAL
3/ Boot Linux with ECC == none
nanddump -nop -l 0x800 -s <adddr> /dev/mtd1

See tracing below

U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)
SoC:   MV88F6810-A0 at 1066 MHz
DRAM: 1 GiB (533 MHz, 16-bit, ECC not enabled)
WDT:   Enabling Armada 385 watchdog.
NAND: PXA3xx: strength 4, ecc_stepsize 512, page_size 2048
256 MiB
Bad block table found at page 131008, version 0x01
Bad block table found at page 130944, version 0x01
Model: Triax dvb-tc output
Board: Triax dvb-tc output
=> nand scrub 0xFF80000 0x80000
NAND scrub: device 0 offset 0xff80000, size 0x80000
Warning: scrub option will erase all factory set bad blocks!
         There is no reliable way to recover them.
         Use this command only for testing purposes if you
         are sure of what you are doing!
Really scrub this NAND flash? <y/N>
y
Erasing at 0xffe0000 -- 100% complete.
OK
=> boot
Starting kernel ...
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.15.0-rc1-00094-g1791eb8f2475-dirty
Dec 12 09:28:30 CET 2017
...
0xda [    2.699176] nand: Micron MT29F2G08ABAEAH4
2048, OOB size: 64
[    2.710928] nand: NAND_ECC_NONE selected by board driver. This is
not recommended!
[    2.718523] nand: WARNING: pxa3xx_nand-0: the ECC used on your
system is too weak compared to the one required by the NAND chip
[    2.731429] Bad block table not found for chip 0
[    2.737384] Bad block table not found for chip 0
[    2.742024] Scanning device for bad blocks
[    2.891818] Bad block table written to 0x00000ffe0000, version 0x01
[    2.898837] Bad block table written to 0x00000ffc0000, version 0x01
[    2.905152] 2 cmdlinepart partitions found on MTD device
pxa3xx_nand-0 [    2.911708] Creating 2 MTD partitions on
"uboot" [    2.922512] 0x000000100000-0x000010000000 : "ubi0"
...
output-module login: root
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ff80000 and ending at 0x0ff80800...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ffa0000 and ending at 0x0ffa0800...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ffc0000 and ending at 0x0ffc0800...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ffe0000 and ending at 0x0ffe0800...
...
U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)
SoC:   MV88F6810-A0 at 1066 MHz
DRAM: 1 GiB (533 MHz, 16-bit, ECC not enabled)
WDT:   Enabling Armada 385 watchdog.
NAND: PXA3xx: strength 4, ecc_stepsize 512, page_size 2048
256 MiB
Bad block table not found for chip 0
Bad block table not found for chip 0
Scanning device for bad blocks
Bad block table written to 0x00000ffe0000, version 0x01
Bad block table written to 0x00000ffc0000, version 0x01
If I reboot uboot is unable recognise the bbt, but recreates it. But
the kernel is scanning on every boot.
Am I doing anything wrong in the nanddump command?

I did not realize your NAND had 2 partitions (I though /dev/mtd0 was
something else).

In Linux, the offset your give to nanddump is from the beginning of the
MTD device, not the NAND device. Because /dev/mtd1 starts at 0x100000
(8 blocks are used for U-Boot), you have to substract 0x100000 from the
offsets I gave you otherwise you read beyond the device (ie. nothing).

Please try again with:

0xFE80000
0xFEA0000
0xFEC0000
0xFEE0000

Thank you,
Miquèl

Sean Nyekjær

2017-12-12 11:28:46 UTC

Post by Miquel RAYNAL
On Tue, 12 Dec 2017 11:55:22 +0100

Post by Sean NyekjÃ¦r
Hi Miquel

Post by Miquel RAYNAL
Are you sure your U-Boot does actually use the BBT?
The last two blocks (supposedly written by U-Boot) are usually
declared bad by Linux when it does not find the BBT. This is not
the case, like if the last blocks were empty.
Could you try this, still with "ecc-none" and without the

Yes uboot is recreating the bbt and after a new reset it recognise
the new bbt.

Post by Miquel RAYNAL
3/ Boot Linux with ECC == none
nanddump -nop -l 0x800 -s <adddr> /dev/mtd1

See tracing below

U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)
SoC:   MV88F6810-A0 at 1066 MHz
DRAM: 1 GiB (533 MHz, 16-bit, ECC not enabled)
WDT:   Enabling Armada 385 watchdog.
NAND: PXA3xx: strength 4, ecc_stepsize 512, page_size 2048
256 MiB
Bad block table found at page 131008, version 0x01
Bad block table found at page 130944, version 0x01
Model: Triax dvb-tc output
Board: Triax dvb-tc output
=> nand scrub 0xFF80000 0x80000
NAND scrub: device 0 offset 0xff80000, size 0x80000
Warning: scrub option will erase all factory set bad blocks!
         There is no reliable way to recover them.
         Use this command only for testing purposes if you
         are sure of what you are doing!
Really scrub this NAND flash? <y/N>
y
Erasing at 0xffe0000 -- 100% complete.
OK
=> boot
Starting kernel ...
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.15.0-rc1-00094-g1791eb8f2475-dirty
Dec 12 09:28:30 CET 2017
...
0xda [    2.699176] nand: Micron MT29F2G08ABAEAH4
2048, OOB size: 64
[    2.710928] nand: NAND_ECC_NONE selected by board driver. This is
not recommended!
[    2.718523] nand: WARNING: pxa3xx_nand-0: the ECC used on your
system is too weak compared to the one required by the NAND chip
[    2.731429] Bad block table not found for chip 0
[    2.737384] Bad block table not found for chip 0
[    2.742024] Scanning device for bad blocks
[    2.891818] Bad block table written to 0x00000ffe0000, version 0x01
[    2.898837] Bad block table written to 0x00000ffc0000, version 0x01
[    2.905152] 2 cmdlinepart partitions found on MTD device
pxa3xx_nand-0 [    2.911708] Creating 2 MTD partitions on
"uboot" [    2.922512] 0x000000100000-0x000010000000 : "ubi0"
...
output-module login: root
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ff80000 and ending at 0x0ff80800...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ffa0000 and ending at 0x0ffa0800...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ffc0000 and ending at 0x0ffc0800...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ffe0000 and ending at 0x0ffe0800...
...
U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)
SoC:   MV88F6810-A0 at 1066 MHz
DRAM: 1 GiB (533 MHz, 16-bit, ECC not enabled)
WDT:   Enabling Armada 385 watchdog.
NAND: PXA3xx: strength 4, ecc_stepsize 512, page_size 2048
256 MiB
Bad block table not found for chip 0
Bad block table not found for chip 0
Scanning device for bad blocks
Bad block table written to 0x00000ffe0000, version 0x01
Bad block table written to 0x00000ffc0000, version 0x01
If I reboot uboot is unable recognise the bbt, but recreates it. But
the kernel is scanning on every boot.
Am I doing anything wrong in the nanddump command?

I did not realize your NAND had 2 partitions (I though /dev/mtd0 was
something else).

Sorry i should have said that :-)

Post by Miquel RAYNAL
In Linux, the offset your give to nanddump is from the beginning of the
MTD device, not the NAND device. Because /dev/mtd1 starts at 0x100000
(8 blocks are used for U-Boot), you have to substract 0x100000 from the
offsets I gave you otherwise you read beyond the device (ie. nothing).
0xFE80000
0xFEA0000
0xFEC0000
0xFEE0000

***@wandboard:~# nanddump -nop -l 0x800 -s 0xFE80000 /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fe80000 and ending at 0x0fe80800...
***@wandboard:~# nanddump -nop -l 0x800 -s 0xFEA0000 /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fea0000 and ending at 0x0fea0800...
***@wandboard:~# nanddump -nop -l 0x800 -s 0xFEC0000 /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fec0000 and ending at 0x0fec0800...
***@wandboard:~# nanddump -nop -l 0x800 -s 0xFEE0000 /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fee0000 and ending at 0x0fee0800...

/Sean

Miquel RAYNAL

2017-12-12 11:35:23 UTC

On Tue, 12 Dec 2017 12:28:46 +0100

Post by Miquel RAYNAL
On Tue, 12 Dec 2017 11:55:22 +0100

Post by Sean NyekjÃ¦r
Hi Miquel

Post by Miquel RAYNAL
Are you sure your U-Boot does actually use the BBT?
The last two blocks (supposedly written by U-Boot) are usually
declared bad by Linux when it does not find the BBT. This is not
the case, like if the last blocks were empty.
Could you try this, still with "ecc-none" and without the

Post by Miquel RAYNAL
1/ From U-Boot, scrub the last 4 blocks. As your NAND is 256MiB
nand scrub 0xFF80000 0x80000
2/ At this point, U-Boot should tell you it cannot find a bad
block table, a second later it will tell you that it created it
twice at the end of the NAND chip.

Yes uboot is recreating the bbt and after a new reset it recognise
the new bbt.

Post by Miquel RAYNAL
3/ Boot Linux with ECC == none
nanddump -nop -l 0x800 -s <adddr> /dev/mtd1

See tracing below

U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)
SoC:   MV88F6810-A0 at 1066 MHz
DRAM: 1 GiB (533 MHz, 16-bit, ECC not enabled)
WDT:   Enabling Armada 385 watchdog.
NAND: PXA3xx: strength 4, ecc_stepsize 512, page_size 2048
256 MiB
Bad block table found at page 131008, version 0x01
Bad block table found at page 130944, version 0x01
Model: Triax dvb-tc output
Board: Triax dvb-tc output
=> nand scrub 0xFF80000 0x80000
NAND scrub: device 0 offset 0xff80000, size 0x80000
Warning: scrub option will erase all factory set bad blocks!
         There is no reliable way to recover them.
         Use this command only for testing purposes if you
         are sure of what you are doing!
Really scrub this NAND flash? <y/N>
y
Erasing at 0xffe0000 -- 100% complete.
OK
=> boot
Starting kernel ...
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.15.0-rc1-00094-g1791eb8f2475-dirty
Dec 12 09:28:30 CET 2017
...
0xda [    2.699176] nand: Micron MT29F2G08ABAEAH4
2048, OOB size: 64
[    2.710928] nand: NAND_ECC_NONE selected by board driver. This
is not recommended!
[    2.718523] nand: WARNING: pxa3xx_nand-0: the ECC used on your
system is too weak compared to the one required by the NAND chip
[    2.731429] Bad block table not found for chip 0
[    2.737384] Bad block table not found for chip 0
[    2.742024] Scanning device for bad blocks
[    2.891818] Bad block table written to 0x00000ffe0000, version
0x01 [    2.898837] Bad block table written to 0x00000ffc0000,
version 0x01 [    2.905152] 2 cmdlinepart partitions found on MTD
device pxa3xx_nand-0 [    2.911708] Creating 2 MTD partitions on
"uboot" [    2.922512] 0x000000100000-0x000010000000 : "ubi0"
...
output-module login: root
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ff80000 and ending at 0x0ff80800...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ffa0000 and ending at 0x0ffa0800...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ffc0000 and ending at 0x0ffc0800...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ffe0000 and ending at 0x0ffe0800...
...
U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)
SoC:   MV88F6810-A0 at 1066 MHz
DRAM: 1 GiB (533 MHz, 16-bit, ECC not enabled)
WDT:   Enabling Armada 385 watchdog.
NAND: PXA3xx: strength 4, ecc_stepsize 512, page_size 2048
256 MiB
Bad block table not found for chip 0
Bad block table not found for chip 0
Scanning device for bad blocks
Bad block table written to 0x00000ffe0000, version 0x01
Bad block table written to 0x00000ffc0000, version 0x01
If I reboot uboot is unable recognise the bbt, but recreates it.
But the kernel is scanning on every boot.
Am I doing anything wrong in the nanddump command?

I did not realize your NAND had 2 partitions (I though /dev/mtd0 was
something else).

Sorry i should have said that :-)

Post by Miquel RAYNAL
In Linux, the offset your give to nanddump is from the beginning of
the MTD device, not the NAND device. Because /dev/mtd1 starts at
0x100000 (8 blocks are used for U-Boot), you have to substract
0x100000 from the offsets I gave you otherwise you read beyond the
device (ie. nothing).
0xFE80000
0xFEA0000
0xFEC0000
0xFEE0000

Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fe80000 and ending at 0x0fe80800...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fea0000 and ending at 0x0fea0800...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fec0000 and ending at 0x0fec0800...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fee0000 and ending at 0x0fee0800...

Failure is on me for this one: Linux marks the block containing the BBT
as bad to avoid user accesses on it, please use --bb=dumpbad in the
nanddump command.

Once you will have the trace, please do the same again without
on-flash-bbt, this way we can compare both U-Boot and Linux layouts and
find what is wrong.

Thank you,
Miquèl

Sean Nyekjær

2017-12-12 11:49:35 UTC

Hi Miquel,

Post by Miquel RAYNAL
On Tue, 12 Dec 2017 12:28:46 +0100

Post by Miquel RAYNAL
On Tue, 12 Dec 2017 11:55:22 +0100

Post by Sean NyekjÃ¦r
Hi Miquel

Post by Miquel RAYNAL
Are you sure your U-Boot does actually use the BBT?
The last two blocks (supposedly written by U-Boot) are usually
declared bad by Linux when it does not find the BBT. This is not
the case, like if the last blocks were empty.
Could you try this, still with "ecc-none" and without the

Post by Miquel RAYNAL
1/ From U-Boot, scrub the last 4 blocks. As your NAND is 256MiB
nand scrub 0xFF80000 0x80000
2/ At this point, U-Boot should tell you it cannot find a bad
block table, a second later it will tell you that it created it
twice at the end of the NAND chip.

Yes uboot is recreating the bbt and after a new reset it recognise
the new bbt.

Post by Miquel RAYNAL
3/ Boot Linux with ECC == none
nanddump -nop -l 0x800 -s <adddr> /dev/mtd1

See tracing below

U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)
SoC:   MV88F6810-A0 at 1066 MHz
DRAM: 1 GiB (533 MHz, 16-bit, ECC not enabled)
WDT:   Enabling Armada 385 watchdog.
NAND: PXA3xx: strength 4, ecc_stepsize 512, page_size 2048
256 MiB
Bad block table found at page 131008, version 0x01
Bad block table found at page 130944, version 0x01
Model: Triax dvb-tc output
Board: Triax dvb-tc output
=> nand scrub 0xFF80000 0x80000
NAND scrub: device 0 offset 0xff80000, size 0x80000
Warning: scrub option will erase all factory set bad blocks!
         There is no reliable way to recover them.
         Use this command only for testing purposes if you
         are sure of what you are doing!
Really scrub this NAND flash? <y/N>
y
Erasing at 0xffe0000 -- 100% complete.
OK
=> boot
Starting kernel ...
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.15.0-rc1-00094-g1791eb8f2475-dirty
Dec 12 09:28:30 CET 2017
...
0xda [    2.699176] nand: Micron MT29F2G08ABAEAH4
2048, OOB size: 64
[    2.710928] nand: NAND_ECC_NONE selected by board driver. This
is not recommended!
[    2.718523] nand: WARNING: pxa3xx_nand-0: the ECC used on your
system is too weak compared to the one required by the NAND chip
[    2.731429] Bad block table not found for chip 0
[    2.737384] Bad block table not found for chip 0
[    2.742024] Scanning device for bad blocks
[    2.891818] Bad block table written to 0x00000ffe0000, version
0x01 [    2.898837] Bad block table written to 0x00000ffc0000,
version 0x01 [    2.905152] 2 cmdlinepart partitions found on MTD
device pxa3xx_nand-0 [    2.911708] Creating 2 MTD partitions on
"uboot" [    2.922512] 0x000000100000-0x000010000000 : "ubi0"
...
output-module login: root
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ff80000 and ending at 0x0ff80800...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ffa0000 and ending at 0x0ffa0800...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ffc0000 and ending at 0x0ffc0800...
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0ffe0000 and ending at 0x0ffe0800...
...
U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)
SoC:   MV88F6810-A0 at 1066 MHz
DRAM: 1 GiB (533 MHz, 16-bit, ECC not enabled)
WDT:   Enabling Armada 385 watchdog.
NAND: PXA3xx: strength 4, ecc_stepsize 512, page_size 2048
256 MiB
Bad block table not found for chip 0
Bad block table not found for chip 0
Scanning device for bad blocks
Bad block table written to 0x00000ffe0000, version 0x01
Bad block table written to 0x00000ffc0000, version 0x01
If I reboot uboot is unable recognise the bbt, but recreates it.
But the kernel is scanning on every boot.
Am I doing anything wrong in the nanddump command?

I did not realize your NAND had 2 partitions (I though /dev/mtd0 was
something else).

Sorry i should have said that :-)

Post by Miquel RAYNAL
In Linux, the offset your give to nanddump is from the beginning of
the MTD device, not the NAND device. Because /dev/mtd1 starts at
0x100000 (8 blocks are used for U-Boot), you have to substract
0x100000 from the offsets I gave you otherwise you read beyond the
device (ie. nothing).
0xFE80000
0xFEA0000
0xFEC0000
0xFEE0000

Failure is on me for this one: Linux marks the block containing the BBT
as bad to avoid user accesses on it, please use --bb=dumpbad in the
nanddump command.

nanddump -nop -l 0x800 -s 0xFE80000 --bb=dumpbad /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fe80000 and ending at 0x0fe80800...
0x0fe80000: 55 42 49 23 01 00 00 00 00 00 00 00 00 00 00 01
0x0fe80010: 00 00 08 00 00 00 10 00 00 00 00 00 00 00 00 00
0x0fe80020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80030: 00 00 00 00 00 00 00 00 00 00 00 00 7f 58 53 19
0x0fe80040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe800a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe800b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe800c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe800d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe800e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe800f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe801a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe801b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe801c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe801d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe801e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe801f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80220: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80230: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80250: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80260: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80270: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80290: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe802a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe802b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe802c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe802d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe802e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe802f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80310: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80320: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80330: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80340: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80350: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80360: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80370: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80390: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe803a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe803b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe803c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe803d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe803e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe803f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80410: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80420: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80450: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80460: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80490: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe804a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe804b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe804c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe804d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe804e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe804f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80510: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80520: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80530: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80540: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80550: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80560: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80570: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80590: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe805a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe805b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe805c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe805d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe805e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe805f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80610: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80620: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80630: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80640: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80650: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80660: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80670: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80690: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe806a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe806b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe806c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe806d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe806e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe806f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80710: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80720: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80730: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80740: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80770: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe807a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe807b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe807c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe807d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe807e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe807f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: c1 eb aa 03 d3 5c d8 ae fa fd ba 34 2a a5 20 38
OOB Data: fd 0b 22 59 c1 8c 3c a5 a4 62 df f2 d4 7e ff ff

nanddump -nop -l 0x800 -s 0xFEA0000 --bb=dumpbad /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fea0000 and ending at 0x0fea0800...
0x0fea0000: 55 42 49 23 01 00 00 00 00 00 00 00 00 00 00 01
0x0fea0010: 00 00 08 00 00 00 10 00 00 00 00 00 00 00 00 00
0x0fea0020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0030: 00 00 00 00 00 00 00 00 00 00 00 00 7f 58 53 19
0x0fea0040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea00a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea00b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea00c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea00d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea00e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea00f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea01a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea01b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea01c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea01d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea01e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea01f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0220: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0230: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0250: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0260: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0270: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0290: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea02a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea02b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea02c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea02d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea02e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea02f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0310: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0320: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0330: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0340: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0350: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0360: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0370: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0390: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea03a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea03b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea03c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea03d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea03e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea03f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0410: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0420: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0450: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0460: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0490: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea04a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea04b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea04c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea04d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea04e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea04f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0510: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0520: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0530: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0540: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0550: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0560: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0570: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0590: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea05a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea05b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea05c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea05d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea05e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea05f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0610: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0620: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0630: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0640: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0650: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0660: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0670: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0690: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea06a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea06b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea06c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea06d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea06e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea06f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0710: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0720: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0730: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0740: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0770: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea07a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea07b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea07c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea07d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea07e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea07f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: c1 eb aa 03 d3 5c d8 ae fa fd ba 34 2a a5 20 38
OOB Data: fd 0b 22 59 c1 8c 3c a5 a4 62 df f2 d4 7e ff ff

nanddump -nop -l 0x800 -s 0xFEC0000 --bb=dumpbad /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fec0000 and ending at 0x0fec0800...
0x0fec0000: 55 42 49 23 01 00 00 00 00 00 00 00 00 00 00 07
0x0fec0010: 00 00 08 00 00 00 10 00 00 00 00 00 00 00 00 00
0x0fec0020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 ce ae 33
0x0fec0040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec00a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec00b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec00c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec00d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec00e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec00f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec01a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec01b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec01c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec01d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec01e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec01f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0220: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0230: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0250: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0260: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0270: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0290: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec02a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec02b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec02c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec02d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec02e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec02f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0310: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0320: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0330: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0340: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0350: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0360: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0370: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0390: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec03a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec03b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec03c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec03d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec03e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec03f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0410: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0420: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0450: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0460: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0490: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec04a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec04b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec04c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec04d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec04e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec04f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0510: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0520: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0530: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0540: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0550: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0560: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0570: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0590: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec05a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec05b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec05c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec05d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec05e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec05f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0610: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0620: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0630: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0640: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0650: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0660: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0670: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0690: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec06a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec06b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec06c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec06d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec06e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec06f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0710: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0720: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0730: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0740: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0770: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec07a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec07b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec07c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec07d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec07e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec07f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
OOB Data: ff ff ff ff ff ff ff ff 31 74 62 42 56 4d 01 ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: 35 5d 8f b6 13 7e 01 97 f5 09 1d a5 6f 06 05 2b
OOB Data: ae c6 8c d5 73 ac 38 4e 61 0f c7 99 cc 5a ff ff

nanddump -nop -l 0x800 -s 0xFEE0000 --bb=dumpbad /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fee0000 and ending at 0x0fee0800...
0x0fee0000: 55 42 49 23 01 00 00 00 00 00 00 00 00 00 00 07
0x0fee0010: 00 00 08 00 00 00 10 00 00 00 00 00 00 00 00 00
0x0fee0020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 ce ae 33
0x0fee0040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee00a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee00b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee00c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee00d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee00e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee00f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee01a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee01b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee01c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee01d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee01e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee01f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0220: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0230: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0250: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0260: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0270: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0290: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee02a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee02b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee02c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee02d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee02e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee02f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0310: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0320: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0330: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0340: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0350: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0360: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0370: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0390: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee03a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee03b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee03c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee03d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee03e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee03f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0410: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0420: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0450: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0460: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0490: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee04a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee04b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee04c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee04d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee04e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee04f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0510: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0520: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0530: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0540: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0550: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0560: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0570: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0590: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee05a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee05b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee05c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee05d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee05e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee05f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0610: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0620: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0630: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0640: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0650: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0660: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0670: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0690: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee06a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee06b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee06c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee06d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee06e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee06f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0710: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0720: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0730: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0740: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0770: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee07a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee07b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee07c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee07d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee07e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee07f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
OOB Data: ff ff ff ff ff ff ff ff 4d 56 42 62 74 30 01 ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: 35 5d 8f b6 13 7e 01 97 f5 09 1d a5 6f 06 05 2b
OOB Data: ae c6 8c d5 73 ac 38 4e 61 0f c7 99 cc 5a ff ff

Post by Miquel RAYNAL
Once you will have the trace, please do the same again without
on-flash-bbt, this way we can compare both U-Boot and Linux layouts and
find what is wrong.

Should I compile a new uboot without on-flash-bbt, disable it in the
kernel dts and finally scrub the last nand pages?

/Sean

Miquel RAYNAL

2017-12-12 12:47:06 UTC

On Tue, 12 Dec 2017 12:49:35 +0100

Post by Sean NyekjÃ¦r
Hi Miquel,

Post by Miquel RAYNAL
On Tue, 12 Dec 2017 12:28:46 +0100

Post by Miquel RAYNAL
On Tue, 12 Dec 2017 11:55:22 +0100

Post by Sean NyekjÃ¦r
Hi Miquel

Post by Miquel RAYNAL
Are you sure your U-Boot does actually use the BBT?
The last two blocks (supposedly written by U-Boot) are usually
declared bad by Linux when it does not find the BBT. This is not
the case, like if the last blocks were empty.
Could you try this, still with "ecc-none" and without the

Post by Miquel RAYNAL
1/ From U-Boot, scrub the last 4 blocks. As your NAND is 256MiB
nand scrub 0xFF80000 0x80000
2/ At this point, U-Boot should tell you it cannot find a bad
block table, a second later it will tell you that it created it
twice at the end of the NAND chip.

Yes uboot is recreating the bbt and after a new reset it
recognise the new bbt.

Post by Miquel RAYNAL
3/ Boot Linux with ECC == none
nanddump -nop -l 0x800 -s <adddr> /dev/mtd1

See tracing below

Post by Miquel RAYNAL
Supposedly that /dev/mtd1 is the _last_ MTD partition of your
0xFF80000
0xFFA0000
0xFFC0000
0xFFE0000
Please copy/paste the overall trace without any cuts (including
U-Boot traces, literally everything).

U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)
SoC:   MV88F6810-A0 at 1066 MHz
DRAM: 1 GiB (533 MHz, 16-bit, ECC not enabled)
WDT:   Enabling Armada 385 watchdog.
NAND: PXA3xx: strength 4, ecc_stepsize 512, page_size 2048
256 MiB
Bad block table found at page 131008, version 0x01
Bad block table found at page 130944, version 0x01
Model: Triax dvb-tc output
Board: Triax dvb-tc output
=> nand scrub 0xFF80000 0x80000
NAND scrub: device 0 offset 0xff80000, size 0x80000
Warning: scrub option will erase all factory set bad blocks!
         There is no reliable way to recover them.
         Use this command only for testing purposes if you
         are sure of what you are doing!
Really scrub this NAND flash? <y/N>
y
Erasing at 0xffe0000 -- 100% complete.
OK
=> boot
Starting kernel ...
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.15.0-rc1-00094-g1791eb8f2475-dirty
Tue Dec 12 09:28:30 CET 2017
...
[    2.692801] nand: device found, Manufacturer ID: 0x2c, Chip
ID: 0xda [    2.699176] nand: Micron MT29F2G08ABAEAH4
[    2.703232] nand: 256 MiB, SLC, erase size: 128 KiB, page
size: 2048, OOB size: 64
[    2.710928] nand: NAND_ECC_NONE selected by board driver. This
is not recommended!
[    2.718523] nand: WARNING: pxa3xx_nand-0: the ECC used on your
system is too weak compared to the one required by the NAND chip
[    2.731429] Bad block table not found for chip 0
[    2.737384] Bad block table not found for chip 0
[    2.742024] Scanning device for bad blocks
[    2.891818] Bad block table written to 0x00000ffe0000, version
0x01 [    2.898837] Bad block table written to 0x00000ffc0000,
version 0x01 [    2.905152] 2 cmdlinepart partitions found on MTD
device pxa3xx_nand-0 [    2.911708] Creating 2 MTD partitions on
"uboot" [    2.922512] 0x000000100000-0x000010000000 : "ubi0"
...
output-module login: root
0xFF80000 /dev/mtd1 Block size 131072, page size 2048, OOB size
64 Dumping data starting at 0x0ff80000 and ending at
0xFFA0000 /dev/mtd1 Block size 131072, page size 2048, OOB size
64 Dumping data starting at 0x0ffa0000 and ending at
0xFFC0000 /dev/mtd1 Block size 131072, page size 2048, OOB size
64 Dumping data starting at 0x0ffc0000 and ending at
0xFFE0000 /dev/mtd1 Block size 131072, page size 2048, OOB size
64 Dumping data starting at 0x0ffe0000 and ending at
...
U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)
SoC:   MV88F6810-A0 at 1066 MHz
DRAM: 1 GiB (533 MHz, 16-bit, ECC not enabled)
WDT:   Enabling Armada 385 watchdog.
NAND: PXA3xx: strength 4, ecc_stepsize 512, page_size 2048
256 MiB
Bad block table not found for chip 0
Bad block table not found for chip 0
Scanning device for bad blocks
Bad block table written to 0x00000ffe0000, version 0x01
Bad block table written to 0x00000ffc0000, version 0x01
If I reboot uboot is unable recognise the bbt, but recreates it.
But the kernel is scanning on every boot.
Am I doing anything wrong in the nanddump command?

I did not realize your NAND had 2 partitions (I though /dev/mtd0
was something else).

Sorry i should have said that :-)

Post by Miquel RAYNAL
In Linux, the offset your give to nanddump is from the beginning
of the MTD device, not the NAND device. Because /dev/mtd1 starts
at 0x100000 (8 blocks are used for U-Boot), you have to substract
0x100000 from the offsets I gave you otherwise you read beyond the
device (ie. nothing).
0xFE80000
0xFEA0000
0xFEC0000
0xFEE0000

Failure is on me for this one: Linux marks the block containing the
BBT as bad to avoid user accesses on it, please use --bb=dumpbad in
the nanddump command.

nanddump -nop -l 0x800 -s 0xFE80000 --bb=dumpbad /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fe80000 and ending at 0x0fe80800...
0x0fe80000: 55 42 49 23 01 00 00 00 00 00 00 00 00 00 00 01
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0x0fe80100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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0x0fe80160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe801a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe801b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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0x0fe801d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe801e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe801f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80220: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80230: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80250: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80260: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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0x0fe802e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe802f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80310: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80320: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80330: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80340: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80350: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80360: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80370: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80390: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe803a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe803b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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0x0fe80430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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0x0fe80460: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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0x0fe80500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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0x0fe805a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe805b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe805c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe805d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe805e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe805f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80610: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80620: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80630: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80640: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80650: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80660: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80670: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80690: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe806a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe806b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe806c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe806d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe806e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe806f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80710: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80720: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80730: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80740: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80770: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe80790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe807a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe807b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe807c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe807d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe807e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fe807f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: c1 eb aa 03 d3 5c d8 ae fa fd ba 34 2a a5 20 38
OOB Data: fd 0b 22 59 c1 8c 3c a5 a4 62 df f2 d4 7e ff ff
nanddump -nop -l 0x800 -s 0xFEA0000 --bb=dumpbad /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fea0000 and ending at 0x0fea0800...
0x0fea0000: 55 42 49 23 01 00 00 00 00 00 00 00 00 00 00 01
0x0fea0010: 00 00 08 00 00 00 10 00 00 00 00 00 00 00 00 00
0x0fea0020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0030: 00 00 00 00 00 00 00 00 00 00 00 00 7f 58 53 19
0x0fea0040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea00a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea00b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea00c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea00d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea00e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea00f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea01a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea01b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea01c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea01d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea01e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea01f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0220: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0230: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0250: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0260: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0270: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0290: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea02a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea02b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea02c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea02d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea02e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea02f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0310: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0320: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0330: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0340: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0350: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0360: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0370: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0390: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea03a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea03b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea03c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea03d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea03e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea03f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0410: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0420: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0450: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0460: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0490: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea04a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea04b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea04c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea04d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea04e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea04f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0510: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0520: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0530: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0540: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0550: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0560: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0570: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0590: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea05a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea05b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea05c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea05d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea05e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea05f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0610: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0620: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0630: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0640: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0650: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0660: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0670: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0690: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea06a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea06b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea06c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea06d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea06e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea06f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0710: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0720: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0730: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0740: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0770: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea0790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea07a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea07b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea07c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea07d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea07e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fea07f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: c1 eb aa 03 d3 5c d8 ae fa fd ba 34 2a a5 20 38
OOB Data: fd 0b 22 59 c1 8c 3c a5 a4 62 df f2 d4 7e ff ff
nanddump -nop -l 0x800 -s 0xFEC0000 --bb=dumpbad /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fec0000 and ending at 0x0fec0800...
0x0fec0000: 55 42 49 23 01 00 00 00 00 00 00 00 00 00 00 07
0x0fec0010: 00 00 08 00 00 00 10 00 00 00 00 00 00 00 00 00
0x0fec0020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 ce ae 33
0x0fec0040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec00a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec00b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec00c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec00d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec00e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec00f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec01a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec01b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec01c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec01d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec01e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec01f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0220: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0230: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0250: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0260: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0270: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0290: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec02a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec02b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec02c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec02d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec02e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec02f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0310: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0320: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0330: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0340: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0350: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0360: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0370: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0390: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec03a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec03b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec03c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec03d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec03e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec03f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0410: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0420: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0450: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0460: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0490: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec04a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec04b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec04c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec04d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec04e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec04f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0510: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0520: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0530: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0540: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0550: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0560: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0570: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0590: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec05a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec05b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec05c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec05d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec05e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec05f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0610: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0620: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0630: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0640: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0650: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0660: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0670: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0690: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec06a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec06b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec06c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec06d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec06e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec06f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0710: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0720: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0730: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0740: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0770: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec0790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec07a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec07b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec07c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec07d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec07e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fec07f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
OOB Data: ff ff ff ff ff ff ff ff 31 74 62 42 56 4d 01 ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: 35 5d 8f b6 13 7e 01 97 f5 09 1d a5 6f 06 05 2b
OOB Data: ae c6 8c d5 73 ac 38 4e 61 0f c7 99 cc 5a ff ff
nanddump -nop -l 0x800 -s 0xFEE0000 --bb=dumpbad /dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fee0000 and ending at 0x0fee0800...
0x0fee0000: 55 42 49 23 01 00 00 00 00 00 00 00 00 00 00 07
0x0fee0010: 00 00 08 00 00 00 10 00 00 00 00 00 00 00 00 00
0x0fee0020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 ce ae 33
0x0fee0040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee00a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee00b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee00c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee00d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee00e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee00f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee01a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee01b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee01c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee01d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee01e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee01f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0220: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0230: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0250: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0260: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0270: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0290: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee02a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee02b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee02c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee02d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee02e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee02f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0310: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0320: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0330: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0340: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0350: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0360: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0370: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0390: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee03a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee03b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee03c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee03d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee03e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee03f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0410: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0420: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0450: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0460: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0490: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee04a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee04b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee04c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee04d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee04e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee04f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0510: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0520: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0530: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0540: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0550: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0560: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0570: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0590: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee05a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee05b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee05c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee05d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee05e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee05f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0610: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0620: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0630: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0640: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0650: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0660: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0670: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0690: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee06a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee06b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee06c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee06d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee06e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee06f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0710: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0720: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0730: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0740: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0770: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee0790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee07a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee07b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee07c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee07d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee07e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0fee07f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
OOB Data: ff ff ff ff ff ff ff ff 4d 56 42 62 74 30 01 ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: 35 5d 8f b6 13 7e 01 97 f5 09 1d a5 6f 06 05 2b
OOB Data: ae c6 8c d5 73 ac 38 4e 61 0f c7 99 cc 5a ff ff

Post by Miquel RAYNAL
Once you will have the trace, please do the same again without
on-flash-bbt, this way we can compare both U-Boot and Linux layouts
and find what is wrong.

Should I compile a new uboot without on-flash-bbt, disable it in the
kernel dts and finally scrub the last nand pages?

Please prevent the script attaching UBI to run on boot (or remove the
ubi.mtd thing from the cmdline) because it fails the test. As you can
see, the BBT (the last two pages) are filled with UBI data because the
blocks are marked free after scrubbing.

Also, please give us the traces twice, one time with and one time
without the on-flash-bbt property in the Linux DT (do not recompile
u-boot).

Thank you,
Miquèl

Sean Nyekjær

2017-12-12 13:09:29 UTC

Hi Miquel

Post by Miquel RAYNAL
Please prevent the script attaching UBI to run on boot (or remove the
ubi.mtd thing from the cmdline) because it fails the test. As you can
see, the BBT (the last two pages) are filled with UBI data because the
blocks are marked free after scrubbing.
Also, please give us the traces twice, one time with and one time
without the on-flash-bbt property in the Linux DT (do not recompile
u-boot).

Without kernel bbt (nand scrubbed in uboot just before boot):
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fe80000 and ending at 0x0fe80800...
0x0fe80000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80040: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80060: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80090: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80110: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80120: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80130: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80140: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80150: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80160: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80170: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80190: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80210: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80220: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80230: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80240: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80250: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80260: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80270: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80290: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80310: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80320: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80330: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80340: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80350: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80360: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80370: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80390: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80410: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80420: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80430: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80440: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80450: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80460: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80470: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80490: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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0x0fe80790: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fea0000 and ending at 0x0fea0800...
0x0fea0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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0x0fea0750: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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0x0fea0770: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fec0000 and ending at 0x0fec0800...
0x0fec0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0040: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0060: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0090: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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0x0fec07a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fee0000 and ending at 0x0fee0800...
0x0fee0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0040: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0060: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0090: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0110: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0120: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0130: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0140: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0150: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0160: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0170: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0190: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0210: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0220: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0230: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0240: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0250: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0260: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0270: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0290: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0310: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0320: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0330: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0340: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0350: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0360: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0370: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0390: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee03a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee03b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee03c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee03d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee03e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee03f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0410: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0420: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0430: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0440: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0450: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0460: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0470: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0490: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0510: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0520: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0530: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0540: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0550: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0560: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0570: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0590: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0610: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0620: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0630: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0640: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0650: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0660: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0670: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0690: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0710: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0720: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0730: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0740: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0750: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0760: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0770: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0790: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

With kernel bbt (nand scrubbed in uboot just before boot):
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fe80000 and ending at 0x0fe80800...
0x0fe80000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80040: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80060: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80090: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80110: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80120: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80130: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80140: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80150: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80160: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80170: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80190: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80210: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80220: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80230: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80240: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80250: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80260: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80270: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80290: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80310: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80320: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80330: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80340: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80350: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80360: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80370: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80390: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80410: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80420: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80430: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80440: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80450: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80460: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80470: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80490: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80510: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80520: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80530: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80540: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80550: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80560: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80570: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80590: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe805a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe805b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe805c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe805d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe805e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe805f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80610: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80620: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80630: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80640: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80650: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80660: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80670: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80690: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe806a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe806b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe806c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe806d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe806e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe806f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80710: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80720: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80730: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80740: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80750: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80760: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80770: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80790: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe807a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe807b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe807c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe807d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe807e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe807f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fea0000 and ending at 0x0fea0800...
0x0fea0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0040: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0060: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0090: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea00a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea00b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea00c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea00d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea00e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea00f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0110: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0120: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0130: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0140: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0150: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0160: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0170: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0190: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea01a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea01b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea01c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea01d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea01e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea01f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0210: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0220: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0230: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0240: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0250: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0260: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0270: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0290: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea02a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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0x0fea0730: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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0x0fea0750: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0760: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0770: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0790: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fec0000 and ending at 0x0fec0800...
0x0fec0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0040: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0060: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0090: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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0x0fec0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0110: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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0x0fec0130: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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0x0fec0150: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0160: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0170: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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0x0fec0190: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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0x0fec0680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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0x0fec06f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0710: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0720: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0730: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0740: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0750: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0760: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0770: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0790: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff 31 74 62 42 56 4d 01 ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fee0000 and ending at 0x0fee0800...
0x0fee0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0040: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0060: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0090: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0110: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0120: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0130: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0140: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0150: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0160: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0170: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0190: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0210: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0220: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0230: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0240: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0250: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0260: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0270: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0290: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0310: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0320: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0330: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0340: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0350: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0360: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0370: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0390: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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0x0fee03c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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0x0fee03e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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0x0fee0400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0410: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0420: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0430: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0440: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0450: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0460: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0470: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0490: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0510: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0520: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0530: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0540: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0550: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0560: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0570: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0590: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0610: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0620: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0630: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0640: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0650: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0660: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0670: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0690: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0710: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0720: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0730: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0740: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0750: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0760: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0770: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0790: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff 4d 56 42 62 74 30 01 ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

/Sean

Miquel RAYNAL

2017-12-12 13:35:12 UTC

Hello Sean,
[...]

Post by Sean NyekjÃ¦r
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fec0000 and ending at 0x0fec0800...

[...]

Post by Sean NyekjÃ¦r
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

As you can see, your U-Boot version does not recreate the BBT
automatically as I told you it should. Please try rebooting the board
after scrubbing and then check U-Boot creates the BBT from U-Boot
command line.

I insist on the fact that this is something I could have spotted earlier
if you had blindlessly copy/pasted the *entire* trace, I don't
mind if it is big, it can be really interesting for others to get the
full trace.

This time I only need the trace without the "on-flash-bbt" property.

Thank you,
Miquèl

Sean Nyekjær

2017-12-12 18:10:10 UTC

Hi Miquel

Post by Miquel RAYNAL
[...]

Post by Sean NyekjÃ¦r
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fec0000 and ending at 0x0fec0800...

[...]

My uboot is recreating the bbt, I have been scrubbing it just before running the bootcmd that's why the OOB is empty :-)
I thought that was what you needed but I guess I was wrong.

Post by Miquel RAYNAL
I insist on the fact that this is something I could have spotted earlier
if you had blindlessly copy/pasted the *entire* trace, I don't
mind if it is big, it can be really interesting for others to get the
full trace.
This time I only need the trace without the "on-flash-bbt" property.

I see what you want now, you want me to dump what uboot is writing in the bbt and what the new driver is writing :-)
Correct?
I'm sending some tracing the first thing tomorrow.

/Sean

Miquel RAYNAL

2017-12-12 18:23:27 UTC

On Tue, 12 Dec 2017 19:10:10 +0100

Post by Sean NyekjÃ¦r
Hi Miquel

Post by Miquel RAYNAL
[...]

Post by Sean NyekjÃ¦r
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fec0000 and ending at 0x0fec0800...

[...]

My uboot is recreating the bbt, I have been scrubbing it just before
running the bootcmd that's why the OOB is empty :-) I thought that
was what you needed but I guess I was wrong.

I see what you want now, you want me to dump what uboot is writing in
the bbt and what the new driver is writing :-) Correct?

Correct :)

You already gave me what the driver writes (without ECC, but it does
not matter, we know the ECC engine will be used in regular conditions),
what I seek now is effectively what U-Boot is writing to understand
where the mismatch is.

Post by Sean NyekjÃ¦r
I'm sending some tracing the first thing tomorrow.

Nice!

Thanks,
Miquèl

Sean Nyekjær

2017-12-13 06:25:58 UTC

Hi Miquel

Post by Miquel RAYNAL
[...]

Post by Sean NyekjÃ¦r
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fec0000 and ending at 0x0fec0800...

[...]

My uboot is recreating the bbt, I have been scrubbing it just before
running the bootcmd that's why the OOB is empty :-) I thought that
was what you needed but I guess I was wrong.

I have double checked the result without kernel bbt and the bbt written
from uboot, the marvell_nand driver is reading 0xFF's...

Tracing:
U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)

SoC:   MV88F6810-A0 at 1066 MHz
DRAM: 1 GiB (533 MHz, 16-bit, ECC not enabled)
WDT:   Enabling Armada 385 watchdog.
NAND: PXA3xx: strength 4, ecc_stepsize 512, page_size 2048
256 MiB
Bad block table found at page 131008, version 0x01
Bad block table found at page 130944, version 0x01
Model: Triax dvb-tc output
Board: Triax dvb-tc output
Net:
Warning: ***@30000 (eth0) using random MAC address - d6:4c:37:5e:b6:28
eth0: ***@30000
=> nand erase.part ubi0; nand scrub 0xFF80000 0x80000; nand bad

NAND erase.part: device 0 offset 0x100000, size 0xff00000
Skipping bad block at 0x0ff00000
Skipping bad block at 0x0ff20000
Skipping bad block at 0x0ff40000
Skipping bad block at 0x0ff60000
Skipping bad block at 0x0ff80000
Skipping bad block at 0x0ffa0000
Skipping bad block at 0x0ffc0000
Skipping bad block at 0x0ffe0000

OK

NAND scrub: device 0 offset 0xff80000, size 0x80000
Warning: scrub option will erase all factory set bad blocks!
         There is no reliable way to recover them.
         Use this command only for testing purposes if you
         are sure of what you are doing!

Really scrub this NAND flash? <y/N>
y
Erasing at 0xffe0000 -- 100% complete.
OK

Device 0 bad blocks:
Bad block table not found for chip 0
Bad block table not found for chip 0
Scanning device for bad blocks
Bad block table written to 0x00000ffe0000, version 0x01
Bad block table written to 0x00000ffc0000, version 0x01
0ff00000
0ff20000
0ff40000
0ff60000
0ff80000
0ffa0000
0ffc0000
0ffe0000
=> boot
[ ... ]
[    2.699996] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda
[    2.706413] nand: Micron MT29F2G08ABAEAH4
[    2.710461] nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048,
OOB size: 64
[    2.718122] nand: NAND_ECC_NONE selected by board driver. This is not
recommended!
[    2.725750] nand: WARNING: pxa3xx_nand-0: the ECC used on your system
is too weak compared to the one required by the NAND chip
[    2.737295] Scanning device for bad blocks
[    2.886451] 2 cmdlinepart partitions found on MTD device pxa3xx_nand-0
[    2.893008] Creating 2 MTD partitions on "pxa3xx_nand-0":
[    2.898429] 0x000000000000-0x000000100000 : "uboot"
[    2.903806] 0x000000100000-0x000010000000 : "ubi0"
[ ... ]
***@output-module:~# nanddump -nop -l 0x800 --bb=dumpbad -s 0xFE80000
/dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fe80000 and ending at 0x0fe80800...
0x0fe80000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80040: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80060: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80090: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe800f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80110: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80120: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80130: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80140: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80150: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80160: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80170: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80190: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe801f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80210: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80220: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80230: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80240: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80250: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80260: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80270: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80290: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe802f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80310: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80320: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80330: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80340: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80350: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80360: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80370: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80390: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe803f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80410: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80420: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80430: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80440: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80450: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80460: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80470: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80490: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe804f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80510: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80520: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80530: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80540: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80550: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80560: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80570: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80590: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe805a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe805b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe805c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe805d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe805e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe805f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80610: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80620: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80630: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80640: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80650: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80660: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80670: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80690: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe806a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe806b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe806c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe806d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe806e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe806f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80710: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80720: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80730: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80740: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80750: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80760: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80770: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe80790: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe807a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe807b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe807c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe807d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe807e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fe807f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
***@output-module:~# nanddump -nop -l 0x800 --bb=dumpbad -s 0xFEA0000
/dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fea0000 and ending at 0x0fea0800...
0x0fea0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0040: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0060: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0090: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea00a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea00b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea00c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea00d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea00e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea00f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0110: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0120: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0130: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0140: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0150: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0160: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0170: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0190: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea01a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea01b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea01c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea01d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea01e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea01f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0210: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0220: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0230: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0240: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0250: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0260: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0270: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0290: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea02a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea02b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea02c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea02d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea02e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea02f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0310: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0320: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0330: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0340: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0350: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0360: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0370: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0390: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea03a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea03b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea03c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea03d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea03e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea03f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0410: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0420: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0430: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0440: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0450: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0460: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0470: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0490: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea04a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea04b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea04c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea04d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea04e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea04f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0510: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0520: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0530: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0540: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0550: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0560: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0570: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0590: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea05a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea05b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea05c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea05d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea05e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea05f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0610: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0620: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0630: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0640: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0650: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0660: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0670: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0690: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea06a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea06b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea06c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea06d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea06e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea06f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0710: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0720: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0730: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0740: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0750: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0760: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0770: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea0790: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea07a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea07b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea07c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea07d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea07e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fea07f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
***@output-module:~# nanddump -nop -l 0x800 --bb=dumpbad -s 0xFEC0000
/dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fec0000 and ending at 0x0fec0800...
0x0fec0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0040: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0060: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0090: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec00a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec00b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec00c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec00d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec00e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec00f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0110: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0120: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0130: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0140: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0150: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0160: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0170: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0190: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec01a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec01b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec01c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec01d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec01e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec01f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0210: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0220: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0230: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0240: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0250: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0260: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0270: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0290: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec02a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec02b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec02c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec02d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec02e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec02f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0310: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0320: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0330: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0340: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0350: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0360: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0370: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0390: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec03a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec03b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec03c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec03d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec03e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec03f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0410: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0420: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0430: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0440: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0450: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0460: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0470: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0490: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec04a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec04b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec04c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec04d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec04e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec04f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0510: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0520: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0530: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0540: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0550: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0560: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0570: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0590: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec05a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec05b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec05c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec05d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec05e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec05f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0610: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0620: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0630: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0640: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0650: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0660: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0670: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0690: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec06a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec06b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec06c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec06d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec06e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec06f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0710: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0720: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0730: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0740: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0750: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0760: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0770: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec0790: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fec07f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
***@output-module:~# nanddump -nop -l 0x800 --bb=dumpbad -s 0xFEE0000
/dev/mtd1
Block size 131072, page size 2048, OOB size 64
Dumping data starting at 0x0fee0000 and ending at 0x0fee0800...
0x0fee0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0040: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0060: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0090: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee00f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0110: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0120: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0130: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0140: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0150: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0160: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0170: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0190: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee01f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0210: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0220: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0230: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0240: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0250: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0260: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0270: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0290: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee02f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0310: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0320: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0330: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0340: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0350: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0360: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0370: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0390: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee03a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee03b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee03c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee03d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee03e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee03f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0410: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0420: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0430: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0440: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0450: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0460: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0470: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0490: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee04f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0510: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0520: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0530: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0540: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0550: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0560: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0570: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0590: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee05f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0610: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0620: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0630: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0640: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0650: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0660: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0670: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0690: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee06f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0710: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0720: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0730: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0740: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0750: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0760: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0770: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee0790: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x0fee07f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
***@output-module:~# reboot
[ ... ]
U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)

SoC:   MV88F6810-A0 at 1066 MHz
DRAM: 1 GiB (533 MHz, 16-bit, ECC not enabled)
WDT:   Enabling Armada 385 watchdog.
NAND: PXA3xx: strength 4, ecc_stepsize 512, page_size 2048
256 MiB
Bad block table found at page 131008, version 0x01
Bad block table found at page 130944, version 0x01

Miquel RAYNAL

2017-12-13 08:41:05 UTC

Hi Sean,

Post by Miquel RAYNAL
I insist on the fact that this is something I could have spotted earlier
if you had blindlessly copy/pasted the *entire* trace, I don't
mind if it is big, it can be really interesting for others to get
the full trace.
This time I only need the trace without the "on-flash-bbt"
property.

I have double checked the result without kernel bbt and the bbt
written from uboot, the marvell_nand driver is reading 0xFF's...

That is weird. I am gonna check with my setup if the sequence I ask you
actually works.

Post by Sean NyekjÃ¦r
U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)

"-dirty"? Is the 17.11 U-Boot clean around the NAND area? What did you
change from mainline code?

Post by Sean NyekjÃ¦r
SoC:   MV88F6810-A0 at 1066 MHz
DRAM: 1 GiB (533 MHz, 16-bit, ECC not enabled)
WDT:   Enabling Armada 385 watchdog.
NAND: PXA3xx: strength 4, ecc_stepsize 512, page_size 2048
256 MiB
Bad block table found at page 131008, version 0x01
Bad block table found at page 130944, version 0x01
Model: Triax dvb-tc output
Board: Triax dvb-tc output
=> nand erase.part ubi0; nand scrub 0xFF80000 0x80000; nand bad
NAND erase.part: device 0 offset 0x100000, size 0xff00000
Skipping bad block at 0x0ff00000
Skipping bad block at 0x0ff20000
Skipping bad block at 0x0ff40000
Skipping bad block at 0x0ff60000
Skipping bad block at 0x0ff80000
Skipping bad block at 0x0ffa0000
Skipping bad block at 0x0ffc0000
Skipping bad block at 0x0ffe0000
OK
NAND scrub: device 0 offset 0xff80000, size 0x80000
Warning: scrub option will erase all factory set bad blocks!
         There is no reliable way to recover them.
         Use this command only for testing purposes if you
         are sure of what you are doing!
Really scrub this NAND flash? <y/N>
y
Erasing at 0xffe0000 -- 100% complete.
OK
Bad block table not found for chip 0
Bad block table not found for chip 0
Scanning device for bad blocks
Bad block table written to 0x00000ffe0000, version 0x01
Bad block table written to 0x00000ffc0000, version 0x01
0ff00000
0ff20000
0ff40000
0ff60000
0ff80000
0ffa0000
0ffc0000
0ffe0000
=> boot
[ ... ]

Please, stop doing this, we _really_ _really_ _really_ want the *full*
log, no matter if you think this part is irrelevant.

If for you the trace is too big, please use
http://code.bulix.org/ or https://pastebin.com/

Post by Sean NyekjÃ¦r
0xda [    2.706413] nand: Micron MT29F2G08ABAEAH4
2048, OOB size: 64
[    2.718122] nand: NAND_ECC_NONE selected by board driver. This is
not recommended!
[    2.725750] nand: WARNING: pxa3xx_nand-0: the ECC used on your
system is too weak compared to the one required by the NAND chip
[    2.737295] Scanning device for bad blocks
[    2.886451] 2 cmdlinepart partitions found on MTD device
pxa3xx_nand-0 [    2.893008] Creating 2 MTD partitions on
"uboot" [    2.903806] 0x000000100000-0x000010000000 : "ubi0"
[ ... ]
0xFE80000 /dev/mtd1

While I am investigating on my side, could you please:
- dump the same pages as before from U-Boot, with the OOB area of
course (do not substract the 0x100000 offset from U-Boot), I want
to see if there is actually something in these pages.
- dump the entire MTD1 device from Linux (same configuration as before)
and grep for the string "MVBbt".

Thanks,
Miquèl

Sean Nyekjær

2017-12-13 09:31:44 UTC

Hi Miquel

Post by Miquel RAYNAL
Hi Sean,

Post by Miquel RAYNAL
I insist on the fact that this is something I could have spotted earlier
if you had blindlessly copy/pasted the *entire* trace, I don't
mind if it is big, it can be really interesting for others to get
the full trace.
This time I only need the trace without the "on-flash-bbt"
property.

I have double checked the result without kernel bbt and the bbt
written from uboot, the marvell_nand driver is reading 0xFF's...

That is weird. I am gonna check with my setup if the sequence I ask you
actually works.

Post by Sean NyekjÃ¦r
U-Boot 2017.11-00035-ge9282bb30b-dirty (Dec 12 2017 - 11:22:21 +0100)

"-dirty"? Is the 17.11 U-Boot clean around the NAND area? What did you
change from mainline code?

Clean nand code, just added debug print so we are able to see if the bbt
is read correctly etc.

Please, stop doing this, we _really_ _really_ _really_ want the *full*
log, no matter if you think this part is irrelevant.
If for you the trace is too big, please use
http://code.bulix.org/ or https://pastebin.com/

Nothing magic happens, just tftpboot. I will dump to gist next time ;-)
See link below

- dump the same pages as before from U-Boot, with the OOB area of
course (do not substract the 0x100000 offset from U-Boot), I want
to see if there is actually something in these pages.

=> nand dump 0xFFC0000
Page 0ffc0000 dump:
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB:
    ff ff ff ff ff ff ff ff
    31 74 62 42 56 4d 01 ff
    ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff
=> nand dump 0xFFE0000
Page 0ffe0000 dump:
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
OOB:
    ff ff ff ff ff ff ff ff
    4d 56 42 62 74 30 01 ff
    ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff
    ff ff ff ff ff ff ff ff
=>

Post by Miquel RAYNAL
- dump the entire MTD1 device from Linux (same configuration as before)
and grep for the string "MVBbt".

https://gist.github.com/anonymous/2264abdc94e5d12e3efa8fc085fa1dd5

/Sean

Miquel RAYNAL

2017-12-15 17:25:12 UTC

Hello Sean,

I am very sorry for the delay but it took me some time to figure a way
to reproduce your situation until I started doing the exact sequence I
asked you to follow. It turns out there was a nasty error in the parser
so you could not observe the last blocks of your chip because I messed
up with high addresses.

I updated the Github branch [1], can you rebase on top of it? I think
this time we should get something :)

[1] https://github.com/miquelraynal/linux/tree/marvell/nand-next/nfc

Thanks for your time,
Miquèl

Sean Nyekjær

2017-12-15 18:56:27 UTC

Hi Miquel

Post by Miquel RAYNAL
I am very sorry for the delay but it took me some time to figure a way
to reproduce your situation until I started doing the exact sequence I
asked you to follow. It turns out there was a nasty error in the parser
so you could not observe the last blocks of your chip because I messed
up with high addresses.

Fantastic always nice to be able to reproduce the issue. Glad to be able to help :-)

Post by Miquel RAYNAL
I updated the Github branch [1], can you rebase on top of it? I think
this time we should get something :)

I just did a quick boot with the new commits, and the kernel is able to find the bbt table :-)

I also tried booting with ECC enabled and with that enabled the driver is unable to read the bbt and marked all blocks bad.

/Sean

Miquel RAYNAL

2017-12-15 19:19:55 UTC

Hi Sean,

On Fri, 15 Dec 2017 19:56:27 +0100

Post by Sean NyekjÃ¦r
Hi Miquel

Post by Miquel RAYNAL
I am very sorry for the delay but it took me some time to figure a
way to reproduce your situation until I started doing the exact
sequence I asked you to follow. It turns out there was a nasty error
in the parser so you could not observe the last blocks of your chip
because I messed up with high addresses.

Fantastic always nice to be able to reproduce the issue. Glad to be able to help :-)

Post by Miquel RAYNAL
I updated the Github branch [1], can you rebase on top of it? I think
this time we should get something :)

I just did a quick boot with the new commits, and the kernel is able
to find the bbt table :-)

Good ! :-)

So with nand-ecc-mode = "none" + on-flash-bbt, there is no more issue,
right?

Post by Sean NyekjÃ¦r
I also tried booting with ECC enabled and with that enabled the
driver is unable to read the bbt and marked all blocks bad.

And if I understand correctly, if you remove nand-ecc-mode = "none" (or
set it to "hw"), the kernel fails to find the BBT, that is right?

As I was not expecting such a quick answer, I did push another patch
after sending my email that fixes an issue in mtdcore.c, please check
you have it (there are a few "fixup!" patches, and on top of them you
must find one which is a well-formatted patch about
mtd_check_oob_ops()).

I learned that today: to get a prompt while all blocks are bad, you can
add:

chip->options |= NAND_SKIP_BBTSCAN;

Before nand_scan_tail().

If you can reach a prompt with the failing configuration and when you
will have the time, I will welcome a dump of the same area as before
so we will try to understand what is wrong now ! :)

Thank you,
Miquèl

Sean Nyekjaer

2017-12-17 11:56:01 UTC

Hi Miquel

Post by Miquel RAYNAL
I am very sorry for the delay but it took me some time to figure a
way to reproduce your situation until I started doing the exact
sequence I asked you to follow. It turns out there was a nasty error
in the parser so you could not observe the last blocks of your chip
because I messed up with high addresses.

Fantastic always nice to be able to reproduce the issue. Glad to be able to help :-)

Post by Miquel RAYNAL
I updated the Github branch [1], can you rebase on top of it? I think
this time we should get something :)

I just did a quick boot with the new commits, and the kernel is able
to find the bbt table :-)

Good ! :-)
So with nand-ecc-mode = "none" + on-flash-bbt, there is no more issue,
right?

No more issue with reading the bbt :-)

Post by Sean NyekjÃ¦r
I also tried booting with ECC enabled and with that enabled the
driver is unable to read the bbt and marked all blocks bad.

And if I understand correctly, if you remove nand-ecc-mode = "none" (or
set it to "hw"), the kernel fails to find the BBT, that is right?

Yes.

Post by Miquel RAYNAL
As I was not expecting such a quick answer, I did push another patch
after sending my email that fixes an issue in mtdcore.c, please check
you have it (there are a few "fixup!" patches, and on top of them you
must find one which is a well-formatted patch about
mtd_check_oob_ops()).

I have rebased on top of 9aee88a618f8 mtd: Fix mtd_check_oob_ops()

Post by Miquel RAYNAL
I learned that today: to get a prompt while all blocks are bad, you can
chip->options |= NAND_SKIP_BBTSCAN;
Before nand_scan_tail().
If you can reach a prompt with the failing configuration and when you
will have the time, I will welcome a dump of the same area as before
so we will try to understand what is wrong now ! :)

Nice one, a lot easier to read whats happens

nanddump of BBT without ECC enabled:
https://gist.github.com/anonymous/627e5be058ed93c106d61641f6aa5da0

nanddump of BBT with ECC enabled:
https://gist.github.com/anonymous/76b3240f156c6547cf76d59f2aae49fe
bootsnippet with ECC and NAND_SKIP_BBTSCAN enabled.
https://gist.github.com/anonymous/0d9be95cd9c36ff006f7aa03e7c2cc85

Please let me know what traces you need to fix the ECC :-)

/Sean

Boris Brezillon

2017-12-17 13:19:16 UTC

Hi Sean,

On Sun, 17 Dec 2017 12:56:01 +0100

Post by Sean NyekjÃ¦r
Hi Miquel

Post by Miquel RAYNAL
I am very sorry for the delay but it took me some time to figure a
way to reproduce your situation until I started doing the exact
sequence I asked you to follow. It turns out there was a nasty error
in the parser so you could not observe the last blocks of your chip
because I messed up with high addresses.

Fantastic always nice to be able to reproduce the issue. Glad to be able to help :-)

Post by Miquel RAYNAL
I updated the Github branch [1], can you rebase on top of it? I think
this time we should get something :)

I just did a quick boot with the new commits, and the kernel is able
to find the bbt table :-)

Good ! :-)
So with nand-ecc-mode = "none" + on-flash-bbt, there is no more issue,
right?

No more issue with reading the bbt :-)

Post by Sean NyekjÃ¦r
I also tried booting with ECC enabled and with that enabled the
driver is unable to read the bbt and marked all blocks bad.

And if I understand correctly, if you remove nand-ecc-mode = "none" (or
set it to "hw"), the kernel fails to find the BBT, that is right?

Yes.

I have rebased on top of 9aee88a618f8 mtd: Fix mtd_check_oob_ops()

Nice one, a lot easier to read whats happens
https://gist.github.com/anonymous/627e5be058ed93c106d61641f6aa5da0
https://gist.github.com/anonymous/76b3240f156c6547cf76d59f2aae49fe
bootsnippet with ECC and NAND_SKIP_BBTSCAN enabled.
https://gist.github.com/anonymous/0d9be95cd9c36ff006f7aa03e7c2cc85
Please let me know what traces you need to fix the ECC :-)

The dumps look good (at least, the BBT pattern is correct, we have the
number of ECC bytes we expect and they are where we expect them).

My gut feeling is that something is wrong with ECC (or something related
to ECC) in u-boot.

Can you try to let Linux create the BBT on its own and dump the last
block as you did previously?

So, to sum-up

1/ put the following in your DT

nand-ecc-mode = "hw";
nand-on-flash-bbt;

2/ scrub the NAND from u-boot and make sure you don't reboot after that,
so that u-boot can't recreate its own BBT.

3/ Let Linux boot and dump the pages (in raw mode) where BBTs created by
Linux are supposed to be (should be the same addresses as before)

If we end up with different ECC bytes than what u-boot produces then
there's a mismatch somewhere.

Regards,

Boris

Sean Nyekjaer

2017-12-17 21:47:26 UTC