[PARPORT] parport_pc and via vt82c686a (fwd)

From: Philip Blundell (philb@gnu.org)
Date: Thu Jan 18 2001 - 16:41:38 EST

  • Next message: Tim Waugh: "Re: [PARPORT] parport_pc and via vt82c686a (fwd)"

    Can anybody help this guy?

    ------- Forwarded Message

    Date: Thu, 18 Jan 2001 22:33:14 +0100
    From: ilsensine <ilsensine@inwind.it>
    User-Agent: Mozilla/5.0 (X11; U; Linux 2.4.0 i686; en-US; m18) Gecko/20001107 Netscape6/6.0
    X-Accept-Language: it, en
    MIME-Version: 1.0
    To: Philip.Blundell@pobox.com
    Subject: parport_pc and via vt82c686a
    Content-Type: text/plain; charset=us-ascii; format=flowed
    Content-Transfer-Encoding: 7bit

    I report here a strange behaviour of the parport_pc module on my k7m
    m/b. I use a 2.4.0 kernel.

    My bios settings enable both ecp and epp protocols on parallel port;
    when I load parport_pc I get the following message in syslog:

    Jan 18 22:01:59 Ilsensine kernel: 0x378: FIFO is 16 bytes
    Jan 18 22:01:59 Ilsensine kernel: 0x378: writeIntrThreshold is 8
    Jan 18 22:01:59 Ilsensine kernel: 0x378: readIntrThreshold is 8
    Jan 18 22:01:59 Ilsensine kernel: 0x378: PWord is 8 bits
    Jan 18 22:01:59 Ilsensine kernel: 0x378: Interrupts are ISA-Pulses
    Jan 18 22:01:59 Ilsensine kernel: 0x378: possible IRQ conflict!
    Jan 18 22:01:59 Ilsensine kernel: 0x378: ECP port cfgA=0x10 cfgB=0x00
    Jan 18 22:01:59 Ilsensine kernel: 0x378: ECP settings irq=<none or set
    by other means> dma=<none or set by other means>
    Jan 18 22:01:59 Ilsensine kernel: parport0: PC-style at 0x378 (0x778),
    irq 7, dma 3 [PCSPP,TRISTATE,COMPAT,ECP,DMA]
    Jan 18 22:01:59 Ilsensine kernel: parport0: cpp_daisy: aa5500ff(38)
    Jan 18 22:01:59 Ilsensine kernel: parport0: assign_addrs: aa5500ff(38)
    Jan 18 22:01:59 Ilsensine kernel: parport0: cpp_daisy: aa5500ff(38)
    Jan 18 22:01:59 Ilsensine kernel: parport0: assign_addrs: aa5500ff(38)
    Jan 18 22:01:59 Ilsensine kernel: parport_pc: Via 686A parallel port:
    io=0x378, irq=7, dma=3

    As you can see, a "possible IRQ conflict" is detected, and the epp
    protocol is not shown as available. Actually, irq 7 is owened only by
    the parallel port. This message occours *only* if I enable both ecp and
    epp by bios; I also tried many solutions (various bios settings and
    parameters to parport_pc), but the message is always the same. I use at
    wotk a PIII-based pc with the same kernel, but it doesn't seem to have
    this problem.
    I'm not so skilled in kernel matters, but I think It's a problem of the
    686a controller (wich also seems to cause troubles to many kernel
    developers, as I read). What do you think?

    Please email me if you need more details.
    Thank you for your contribute to the linux kernel :-)
    Giancarlo Formicuccia
    ilsensine@inwind.it

    ------- End of Forwarded Message

    -- To unsubscribe, send mail to: linux-parport-request@torque.net --
    -- with the single word "unsubscribe" in the body of the message. --



    This archive was generated by hypermail 2b29 : Thu Jan 18 2001 - 16:52:17 EST