[PARPORT] FW: results from EPP mode

From: Mark Cianfaglione (markcia@nortelnetworks.com)
Date: Thu Mar 22 2001 - 15:49:10 EST

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    Tim, Philip

    Sorry about the delay but here are the results of the test on the EPP mode
    with the camera.
    I re-compiled the kernel with ieee1284.c and ieee1284_ops.c debugging turned
    on...

    here are the results...

    Mar 21 21:08:27 localhost kernel: negotiation
    Mar 21 21:08:27 localhost kernel: parport0: Mode 0x2040 rejected by
    peripheral
    Mar 21 21:08:27 localhost kernel: parport0: In compatibility (forward idle)
    mode
    Mar 21 21:08:27 localhost kernel: QuickCamVC:WCN1 ieee1284 failed
    negotiation
    Mar 21 21:08:27 localhost kernel: parport0: Mode 0x2040 rejected by
    peripheral
    Mar 21 21:08:27 localhost kernel: parport0: In compatibility (forward idle)
    mode
    Mar 21 21:08:27 localhost kernel: QuickCamVC:WCN1 ieee1284 failed
    negotiation
    Mar 21 21:08:27 localhost kernel: parport0: Mode 0x2040 rejected by
    peripheral
    Mar 21 21:08:27 localhost kernel: parport0: In compatibility (forward idle)
    mode

    >In message
    <6DDA62170439D31185750000F80826AC0588B51F@zmerd004.ca.nortel.com>, "
    >Mark Cianfaglione" writes:
    >>I'm trying to get EPP mode to work on a driver here and I'm coming up with
    >>mode negotiation failures. It seems to work fine trying to negotiate ECP
    >>modes but it fails on EPP modes negotiation. I have the Bios set to
    ECP/EPP
    >>and I've tried EPP 1.7 and 1.9 as well but no luck.

    >Negotiation isn't affected by the mode you have set in the BIOS -- in fact,

    >you can negotiate to EPP even with a SPP port, you just won't be able to
    >transfer any data afterwards. You can enable some debugging at compile
    time
    >in parport/ieee1284.c that should reveal why the handshake is failing.

    >p.

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