[flashrom] [PATCH] Add programmer for the MSTAR I2C ISP protocol

[Idwer Vollering]

2014-05-04 18:20 GMT+02:00 Alexandre Boeglin <alex at boeglin.org>:
> Hi,
>
> Here is a patch, that provides support for the MSTAR ISP protocol.
>
> Basically, among other chips, MSTAR manufactures SoCs that equip TV sets
> and computer screens, and it seems that all of their products use the
> same in-system programming protocol. Basically, they use the DDC channel
> of VGA or DVI connectors, which is actually an I2C bus, to encapsulate
> SPI frames (the flash chip is connected to the SoC through an SPI bus).
>
> I wrote this patch since the screen I bought had a software bug, and the
> manufacturer only released a new firmware binary, but no tool or
> instructions on flashing it.
>
> More details can be found here:
> http://boeglin.org/blog/index.php?entry=Flashing-a-BenQ-Z-series-for-free(dom)

There seems to be a silicon (=SoC) bug as well.

One can recover by rotating the original image (YOU DO HAVE BACKUPS,
RIGHT :) ) _back_wards - the example assumes the read file is 128
kilobyte large:
tail -c 1 orig_read.bin > realimage.bin; head -c 131071 orig_read.bin
>> realimage.bin; flashrom -p mstar -w realimage.bin --noverify

HTH,

Idwer