Re: [PARPORT] ECP mode in 2.2.14 kernel?

From: Dave Strauss (dstrauss@wavemark.com)
Date: Thu Jun 15 2000 - 13:10:27 EDT

  • Next message: Tim Waugh: "Re: [PARPORT] ECP mode in 2.2.14 kernel?"

    On Thu, 15 Jun 2000 17:59:48 +0100, Tim Waugh <twaugh@redhat.com> wrote:
    >
    > On Thu, Jun 15, 2000 at 12:37:40PM -0400, Dave Strauss wrote:
    >
    > > I'm trying to find out if the parallel port code in the 2.2.14 kernel
    > > supports ECP mode. As far as I can tell from reading the sources it
    > > doesn't, but I wanted to verify that this is the case. If it *does*
    > > support ECP, how do I get it to happen? If not, is there any way
    > > I can add patches to add ECP support? What are the plans for adding
    > > ECP support in future kernels?
    >
    > It doesn't support the ECP protocol.
    >
    > There is a patch (ppdev) for 2.2 to make it support the ECP protocol,
    > but which doesn't use hardware ECP assistance.
    >

    I don't understand the significance of "doesn't use hardware ECP
    assistance". What sort of assistance are you referring to? DMA?

    > The 2.4 kernel will use ECP assistance as well.
    >

    Do you mean "The 2.4 kernel also will not use ECP assistance."?
    Does this imply that the 2.4 kernel will do ECP transfers, but
    might be slower than other implementations?

    > Tim.
    > */
    >
    > [ ... ]

    Thanks.

    -- Dave Strauss

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