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108 wiersze
4.8 KiB
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<!-- received="Sat May 8 07:45:28 1999 PDT" -->
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<!-- sent="Sat, 8 May 1999 16:44:28 +0000" -->
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<!-- name="Michele Bini" -->
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<!-- email="mibin@tin.it" -->
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<!-- subject="Re: [PARPORT] Re: parport scanners and the 90c26 adapter" -->
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<!-- inreplyto="199905072041.QAA25969@knot.torque.net" -->
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<title>sane-devel: Re: [PARPORT] Re: parport scanners and the 90c26 adapter</title>
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<h1>Re: [PARPORT] Re: parport scanners and the 90c26 adapter</h1>
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<b>Michele Bini</b> (<a href="mailto:mibin@tin.it"><i>mibin@tin.it</i></a>)<br>
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<i>Sat, 8 May 1999 16:44:28 +0000</i>
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<p>
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<ul>
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<li> <b>Messages sorted by:</b> <a href="date.html#66">[ date ]</a><a href="index.html#66">[ thread ]</a><a href="subject.html#66">[ subject ]</a><a href="author.html#66">[ author ]</a>
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<li> <b>Next message:</b> <a href="0067.html">Nick Lamb: "Re: USB scanner drivers"</a>
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<li> <b>Previous message:</b> <a href="0065.html">David Mosberger-Tang: "Re: USB scanner drivers"</a>
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<li> <b>In reply to:</b> <a href="0063.html">grant@torque.net: "Re: parport scanners and the 90c26 adapter"</a>
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</ul>
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On Fri, May 07, 1999 at 04:41:56PM -0400, <a href="mailto:grant@torque.net">grant@torque.net</a> wrote:<br>
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<i>> > Who is working on it?</i><br>
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<p>
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<i>> I am, with some help from a small number of testers.</i><br>
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<p>
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Glad to hear that. You can count on me as a tester, if<br>
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you like. I assume the responsibility of any eventual<br>
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damage.<br>
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<p>
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<i>> Currently, the driver is stable for all devices _except_</i><br>
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<i>> scanners. We can make it work with scanners, but it</i><br>
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<i>> is extremely slow. So slow that it is not useable.</i><br>
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<p>
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That's better then no support at all.<br>
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<p>
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<i>> I have not yet solved this problem.</i><br>
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<i>> </i><br>
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<i>> > I'd like to work on the code produced so far,</i><br>
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<i>> > even if it is still at an experimental stage.</i><br>
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<p>
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For working I mostly meant testing or tuning.<br>
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<p>
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<i>> Perhaps. Have you done any device driver debugging before ?</i><br>
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<p>
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Not much, however i have some experience of port i/o with<br>
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assembler and i know the basics about kernel modules and<br>
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kernel patching (once i sent at linux-kernel a patch to<br>
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make kernel nfsroot over plip possible, but it got few<br>
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attention).<br>
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<p>
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<p>
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I am pleased that a skilled person like you is developing<br>
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this chip's support, and i am very probably unable to<br>
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replace you on this task.<br>
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The point was that i wrongly feared that<br>
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nobody was anymore developing on it.<br>
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<p>
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<i>> Do you understand the risks ? Be sure that you have a machine</i><br>
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<i>> available with nothing important on it.</i><br>
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<p>
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Do you mean the risks linked to the scanner (i heard about<br>
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overheating, but it seems rare and specific to some models)<br>
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or generic kernel patching/hacking risks (like fs corruption)?<br>
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I am aware of the latter, and assume the responsibility<br>
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of eventual damage (even regarding scanner).<br>
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<p>
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<i>> > I received a Phantom 336CX scanner as a present</i><br>
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<i>> > from a friend, and it seems to have a 90c26</i><br>
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<i>> > parallel-scsi adapter in it.</i><br>
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<i>></i><br>
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<i>> > Using the paride on26 module i'm currently able to</i><br>
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<i>> > turn off and on the led on it, and the driver seems</i><br>
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<i>> > to be able to talk to the chip at first, but after</i><br>
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<i>> > a few seconds it timeouts giving</i><br>
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<i>> > </i><br>
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<i>> > on26: Device reset failed (ff,ff)</i><br>
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<i>> </i><br>
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<i>> Actually, what's happened is that the paride driver</i><br>
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<i>> detects the 90c26 chip. The registers in the chip have</i><br>
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<i>> entirely different functions in the IDE application and</i><br>
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<i>> the SCSI application, except for the bus reset bit. The</i><br>
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<i>> ISA device reset and the SCSI bus reset happen to be </i><br>
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<i>> controlled by the same bit in the same register. That's</i><br>
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<i>> why you see the light flash.</i><br>
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<p>
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Thank you. Is there any spec on this chip?<br>
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I haven't found any spec on OnSpec's site (ironically).<br>
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<p>
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-Michele<br>
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<p>
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<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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</pre>
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<!-- body="end" -->
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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0067.html">Nick Lamb: "Re: USB scanner drivers"</a>
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<li> <b>Previous message:</b> <a href="0065.html">David Mosberger-Tang: "Re: USB scanner drivers"</a>
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<li> <b>In reply to:</b> <a href="0063.html">grant@torque.net: "Re: parport scanners and the 90c26 adapter"</a>
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<!-- nextthread="start" -->
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<!-- reply="end" -->
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</ul>
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