[BUG] pxa3xx: wait time out when scanning for bb
Sean Nyekjær
sean.nyekjaer at prevas.dk
Wed Dec 13 01:31:44 PST 2017
Hi Miquel
> Hi Sean,
>
>>>>> 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.
>
>> Tracing:
>> 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.
>
>
>> 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: ethernet at 30000 (eth0) using random MAC address -
>> d6:4c:37:5e:b6:28 eth0: ethernet at 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
>> [ ... ]
> 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
>> [ 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"
>> [ ... ]
>> root at output-module:~# nanddump -nop -l 0x800 --bb=dumpbad -s
>> 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.
=> nand dump 0xFFC0000
Page 0ffc0000 dump:
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OOB:
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=> nand dump 0xFFE0000
Page 0ffe0000 dump:
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OOB:
ff ff ff ff ff ff ff ff
4d 56 42 62 74 30 01 ff
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=>
> - dump the entire MTD1 device from Linux (same configuration as before)
> and grep for the string "MVBbt".
https://gist.github.com/anonymous/2264abdc94e5d12e3efa8fc085fa1dd5
/Sean
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