[flashrom] [PATCH] Dediprog SF100 support

Stefan Reinauer stepan at coresystems.de
Thu Jan 21 22:03:16 CET 2010

On 1/19/10 2:57 PM, Carl-Daniel Hailfinger wrote:
> On 19.01.2010 14:36, Carl-Daniel Hailfinger wrote:
>> As interim measure, I can increase read chunk size to 16 (speedup factor
>> 4) once we know if read works. Once we know read chunk size 16 works, I
>> can test bigger chunk sizes up to 64 (USB protocol limit). That would be
>> a factor of 16 faster than the current implementation. Maybe not
>> perfect, but it would definitely be usable.
>> I need those chunk size tests anyway to implement write support.
> Tests of this patch are appreciated. Please run in verbose (-V) mode,
> but not SPEW mode (-VV) because SPEW will slow reading down. Some
> timings for a full read would be nice. If we're lucky, full read is
> around 5 minutes, but it should not take substantially longer than 10
> minutes.
> Mark 4 byte RDID as supported by Dediprog.
> Increase read size from 4 bytes to 16 bytes (speedup factor 4).
> Really abort if any unhandled command sizes are run.
> Add some debugging at SPEW level.

It assumes that an ID of 00 00 is a "generic SPI chip". Instead it means
there is no chip connected.

./flashrom -pdediprog
flashrom v0.9.1-r878
Calibrating delay loop... OK.
Found chip "Generic unknown SPI chip (RDID)" (0 KB, SPI) at physical
address 0x0.
This flash part has status NOT WORKING for operations: PROBE READ ERASE
Please email a report to flashrom at flashrom.org if any of the above
work correctly for you with this flash part. Please include the flashrom
output with the additional -V option for all operations you tested (-V, -rV,
-wV, -EV), and mention which mainboard or programmer you tested. Thanks
for your help!
No operations were specified.

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