Re: [flashrom] Read the content of AT49F002(N)T on Syntax SV266A

[Paul Menzel]

[ Please CC me, as I am not subscribed. ]
[ This thread was started on the coreboot list [1]. ]

[1] http://www.coreboot.org/pipermail/coreboot/2009-March/045774.html

Am Sonntag, den 22.03.2009, 19:43 +0100 schrieb Paul Menzel:
> Am Montag, den 23.03.2009, 02:29 +0800 schrieb FENG Yu Ning:
> > 2009/3/23 Paul Menzel :
>
> […]
> > > I tried flashrom with the different delays (10, 100, 1000, 10000, 40000
> > > all in us) afterwards, but the image did not differ.
> >
> > How about probing? does auto-detect work now?
>
> I am afraid it does not.
>
> $ cat /proc/mtrr
> reg00: base=0x00000000 (   0MB), size= 512MB: write-back, count=1
> reg01: base=0xd0000000 (3328MB), size= 128MB: write-combining, count=1
> reg02: base=0xd0000000 (3328MB), size= 128MB: write-combining, count=1
> reg03: base=0xd8000000 (3456MB), size=  64MB: write-combining, count=1
> reg04: base=0xfffc0000 (4095MB), size= 256KB: uncachable, count=1
> $ $ sudo ./flashrom -V
> Calibrating delay loop... 490M loops per second, 100 myus = 141 us. OK.

[…]

Currently I am having access to this machine again, so I tried with
v0.9.2-r1033. Unfortunately I still cannot report success on
auto-detection.

Probing for Atmel AT49F002(N)T, 256 KB: probe_jedec_common: id1 0x25, id2 0xe4, id1 is normal flash content, id2 is normal flash content
    […]
    No EEPROM/flash device found.
    Note: flashrom can never write if the flash chip isn't found automatically.

Did something change in the flashrom infrastructure/source, that makes
adding support for this board easier than over a year ago?

I checked different probe timings (10, 100, 1000, 10000, 40000; all in
us) modifying `flashchips.c` and with and without modifying the MTRR
settings.

$ cat /proc/mtrr
        reg00: base=0x000000000 (    0MB), size=  512MB, count=1: write-back
        reg01: base=0x0d0000000 ( 3328MB), size=  128MB, count=1: write-combining
        reg02: base=0x0d0000000 ( 3328MB), size=  128MB, count=1: write-combining
        reg03: base=0x0d8000000 ( 3456MB), size=  128MB, count=1: write-combining
        $ sudo sh -c 'echo "base=0xfffc0000 size=0x40000 type=uncachable" >| /proc/mtrr'
        $ more /proc/mtrr
        reg00: base=0x000000000 (    0MB), size=  512MB, count=1: write-back
        reg01: base=0x0d0000000 ( 3328MB), size=  128MB, count=1: write-combining
        reg02: base=0x0d0000000 ( 3328MB), size=  128MB, count=1: write-combining
        reg03: base=0x0d8000000 ( 3456MB), size=  128MB, count=1: write-combining
        reg04: base=0x0fffc0000 ( 4095MB), size=  256KB, count=1: uncachable

Probably unrelated but back then the output for `reg03` was different.

reg03: base=0xd8000000 (3456MB), size=  64MB: write-combining, count=1

I am probably forced to do a BIOS upgrade on this board. Is there a
chance I will be able to do this using flashrom?

Thanks,

Paul