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<TITLE>sane-devel: [EPSON / Generic USB] New backend - please test wit</TITLE>
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<META NAME="Author" CONTENT="Karl Heinz Kremer (khk@khk.net)">
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<META NAME="Subject" CONTENT="[EPSON / Generic USB] New backend - please test with SCSI scanners / New USB Query Feature">
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<H1>[EPSON / Generic USB] New backend - please test with SCSI scanners / New USB Query Feature</H1>
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<!-- name="Karl Heinz Kremer" -->
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<STRONG>From:</STRONG> Karl Heinz Kremer (<A HREF="mailto:khk@khk.net?Subject=Re:%20[EPSON%20/%20Generic%20USB]%20New%20backend%20-%20please%20test%20with%20SCSI%20scanners%20/%20New%20USB%20Query%20Feature&In-Reply-To=<20010523223016.A9898@khk.net>"><EM>khk@khk.net</EM></A>)<BR>
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<STRONG>Date:</STRONG> Wed May 23 2001 - 19:30:16 PDT
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<LI><STRONG>Next message:</STRONG> <A HREF="0315.html">Karl Heinz Kremer: "Re: [EPSON / Generic USB] New backend - please test with SCSI scanners / New USB Query Feature"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0313.html">Mick Barry: "Re: Canon 620S conf file"</A>
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<P>
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I just put up a test version of the EPSON backend. It adds support
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<BR>
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for the GT-8000 scanner in the standard backend distribution - so far
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<BR>
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this was only available as a patch agains the backend. If you have any
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<BR>
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EPSON SCSI scanner, please download this backend and give it a try. It
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<BR>
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works for me, but I've tested it just with one model. The backend also
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<BR>
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has experimental (and disabled) support for automatically recognizing
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<BR>
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USB scanners. You need a patched version of the USB scanner driver for
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<BR>
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this. The patch needs to be applied to the scanner.c file of a recent
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<BR>
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(2.4.4 or similar) version of the kernel. In addition you have to enable
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<BR>
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the new functionality by adding the following line to the file epson.c:
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<BR>
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<P>#define TEST_IOCTL
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<BR>
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<P>This feature enables the backend to get information about the connected
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<BR>
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scanner before it sends data to the scanner. It is fairly common that
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<BR>
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a backend tries to send data to a scanner without knowing that the
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<BR>
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scanner can actually be handled by this backend. Sometimes the backend
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<BR>
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not just sends data, it also wants to see a response. This of course
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<BR>
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will fail if the scanner does not even understand the command. My kernel
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<BR>
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patch adds two IOCTLs to the scanner driver that can be used to get
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<BR>
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the vendor and product ID of a connected scanner without having to
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<BR>
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send data to the device. With these IOCTLs the backend can query the
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<BR>
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type and manufacturer of a scanner and then decide if it makes sense
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<BR>
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to actually send data to the device.
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<BR>
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<P>I've submitted this patch to David Nelson for inclusion into the
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<BR>
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USB scanner driver, but have not received any response so far.
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<BR>
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<P>Karl Heinz
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<BR>
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<P>
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<BR><HR NOSHADE>
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<UL>
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<LI>application/pgp-signature attachment: <A HREF="att-0314/01-part">stored</A>
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</UL>
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<P><PRE>
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--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20[EPSON%20/%20Generic%20USB]%20New%20backend%20-%20please%20test%20with%20SCSI%20scanners%20/%20New%20USB%20Query%20Feature&In-Reply-To=<20010523223016.A9898@khk.net>">majordomo@mostang.com</A>
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<LI><STRONG>Next message:</STRONG> <A HREF="0315.html">Karl Heinz Kremer: "Re: [EPSON / Generic USB] New backend - please test with SCSI scanners / New USB Query Feature"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0313.html">Mick Barry: "Re: Canon 620S conf file"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0315.html">Karl Heinz Kremer: "Re: [EPSON / Generic USB] New backend - please test with SCSI scanners / New USB Query Feature"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0315.html">Karl Heinz Kremer: "Re: [EPSON / Generic USB] New backend - please test with SCSI scanners / New USB Query Feature"</A>
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<EM>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Wed May 23 2001 - 19:31:28 PDT</EM>
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