Re: [PARPORT] PCI Parallel Card ECP/EPP modes not detected

From: Tim Waugh (
Date: Sun Nov 03 2002 - 07:38:09 EST

  • Next message: stef: "Re: [PARPORT] ppdev hangs on read"

    On Sat, Nov 02, 2002 at 11:25:37AM -0800, Jason wrote:

    > I have a Timedia PCI Parallel Port Card that I know has ECP/EPP
    > capabilities (it's speced as such and it has ECP/EPP capabilities in
    > windows). BUT parport_pc does not detect it. I am guessing this may
    > have to do with the ECP Register being located at 0xb800 when the
    > SPP register is at 0xd000 (i.e. not the +0x400 like the motherboard
    > parallel port). I am wondering if there is anything I can do to
    > make the ECP/EPP modes detectable as I want to use ppdev to write a
    > user space driver for my scanner.

    Note that you don't need to have hardware ECP support to use ECP
    transfer mode; it just speeds it up.

    > Here is all the info I have:
    > dmesg reports:
    > PCI: Found IRQ 9 for device 00:09.0
    > PCI parallel port detected: 1409:7268, I/O at 0xd000(0xb800)
    > parport1: PC-style at 0xd000 (0xb800) [PCSPP,TRISTATE]
                                   ^^^^^^^^ ^^^^^^^^^^^^^^^^
    It knows that the ECR register is supposed to be there, but couldn't
    see it. Perhaps that board needs to have ECP mode enabled with some
    special utility?


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