[sane-devel] Canon CanoScan Lide120

Stef stef.dev at free.fr
Thu Oct 23 04:55:06 UTC 2014

On 17/10/2014 11:34, Hayder Aziz wrote:
>>    bcdDevice 7.04 signals a genesys chip newer than the GL124 (which 
>> has7.01). Since GL128 is 7.05, we could bet on a GL126 (there is also 
>> a GL125), or like the GL8417 and GL124, another one specially 
>> taylored for Canon, a GL127? . Anyway, I don't know any public 
>> datasheet for these ASICs, which complicates the work for supporting 
>> it. One would have to guess what registers are used for.
>> Regards,
>>     Stef
> Hi.
> Thanks for the reply.
> Should I give up and return this scanner, or is there a way I can help 
> build a driver for it? (if its not too complex!).

     the C code in the genesys backend isn't that complicated. What 
takes time is the guess work on the ASIC behavior and tests involved. 
The guess work will even be bigger without a datasheet. Have a look at 
the rts8891 backend sources to have an idea of this work.

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