[sane-devel] HP ADF Support for chipset RT58822

Valentine Christian valentine.christian at gmail.com
Sat Aug 21 03:19:11 UTC 2010

I have a couple of HP 8250 ADF scanners.  Work nice, but when they get
messed up, I have to plug them into a Win box.  Then I can use them again.
So some initialization and error detection SW is probably missing.  Also,
things like the duplex page feed doesn't work.

I believe the avision driver is not getting any more development at this

If you can tell me how to determine the architecture, without pulling them
apart, I can do that.


On Fri, Aug 20, 2010 at 9:36 PM, JKD <jkdsoft at gmail.com> wrote:

> Hello,
> 2010/8/20 Alejandro Imass <aimass at p2ee.org>
> Hi,
>> I would like to know the current support for the several HP ADF
>> scanners that share the common chipset. From what I could see, it
>> seems that the hp3900 series driver should support most if not all HP
>> scanners based on the RT58822 chipset. Nevertheless, I don't have
>> enough scanner skills to actually confirm this.
> hp3900 focuses on RTS8822 and derivates. I don't know if RT58822 is just
> a mistake or another chipset.
> Here are the scanners we would need support for:
>> 8290, 8350, 8390, 8420, 7800
>> I think our team has confirmed that all except for the 7800 share the
>> same chipset. We can't confirm the 7800 because we haven't had access
>> to it yet, but we will next week.
>  All scanners I've tested using RTS882x don't provide ADF functionality so
> I didn't
> recognize any related register and hp3900 doesn't support it.
>> Question: Is adding support for these as simple as adding their
>> hardware ids to the lists in hp3900.xxx ? What else should we be aware
>> of?
> hp3900 backend has extended options to test device's behavior using known
> settings from recognized chipsets but this chipset is a bit complex needing
> many data to be programmed (such as lamp settings, sensor type, sensor
> clocks,
> motor steps depending on supported resolutions and so on). The idea is
> analyze
> windows' driver to extract all necessary data that may be different in each
> scanner
> model. That may take some time.
> Jonathan Bravo Lopez
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