[sane-devel] Lexmark X215 backend (patch)

[r. a. schmied]

On 05/12/21 14:45, Andrzej Szombierski via sane-devel wrote:
> Hello everyone,
>
> I got an old Lexmark X215 scanner/printer combo. The device is a
> rebranded Samsung and it didn't take much to convince the xerox_mfp
> backend to support it. I've made a preliminary patch (attached). I'm
> posting it in case anyone else is interested in getting this ancient
> device to work.
>
> In case anyone would think it's a good idea to merge this, below is a
> summary of the oddities of this device and my patch.
>
> 1. It seems quite confusing to me, but both the printer and the scanner
> utilize the same set of BULK usb endpoints, on a Printer class
> interface. So they are skipped by sanei_usb. And even if they weren't,
> the interface is usually claimed by usblp.
> 2. To reduce interference with usblp, I've decided to utilize it instead
> (or is there a better way?) So I've added a new transport
> xerox_mfp-usblp. Instead of using sanei_usb (and libusb underneath),
> data is sent directly to the usblp device. On startup, the usual paths
> are searched for usblp devices (with vid/pid filtering to filter out
> only the Lexmark). The code is unlikely to work under a non-Linux OS
> 3. The scanner doesn't support CMD_OBJECT_POSITION. The windows driver
> doesn't send this command. I've added code to skip this command if the
> device model matches "SAMSUNG/ORION" (yes, that's the model name sent by
> the firmware).
> 4. On inquiry, the scanner returns zero values for maximum window height
> (both AFP and manual values). I'm using the max_win_len value instead.
>
> Let me know if you have any comments.
>
aloha Andrzej

now i'm just a kibitzing hack, but you should probably conditionally
bracket #include <unistd.h> with #ifdef HAVE_UNISTD_H.

then tweak configure(am,in) to check for asm/ioctls.h and
then conditionally include it.  solaris 10 sparc has no such header,
but there is /usr/include/sys/ioctl.h.  don't know what you are
doing with asm/ioctls.h but it is probably doable, possibly with
a lot of additional work, on most *nix like os'es.

maybe you could also include some of your text description of
the Lexmark X215/Samsung/ORION/xerox_mfp solution in a comment block
in xerox_mfp-usblp.c so future readers are aware of your approach.

just my couple of bytes

aloha

ras