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    SubjectRe: libata PATA support - work items?
    On Wed, 05 Jan 2005 00:50:05 +0000, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
    > On Maw, 2005-01-04 at 23:41, Jeff Garzik wrote:
    > > So, that said, I think it is important for libata to fully support PATA,
    > > if it is to support it at all. That means handling the errata that Alan
    > > always bugs me about, and that means handling C/H/S support as well.
    >
    > I think so. If it supports all the features of the old IDE layer we get
    > to have a party when we eliminate the need for drivers/ide once and for
    > all.
    >
    > That means
    > - Hotplug (controller and disk)
    > - CHS
    > - "Not quite generic" IDE DMA (eg CS5520)
    > - VDMA (eg CS5520)
    > - IORDY timers (not handled well in drivers/ide but needed)
    > - Funky Maxtor "LBA48.. maybe" oddments
    > - Missing slave detection
    > - Controller errata hooks (modes, drives, timings, "dont touch during an
    > I/O" etc)
    > - Drive nIEN bugs
    > - No nIEN cases
    > - Drives that don't do some DMA/modes right
    > - Crazy shit "Don't DMA from the page below 640K" (not handled by
    > drivers/ide but an AMD errata
    > fixed by using a PS/2 mouse)
    > - Serialize (RZ1000, CMD640, some 469, etc)
    > - Bandwidth arbiter (not in drivers/ide but needed)
    > - Non PCI shared IRQ mess 8(
    >
    > Hopefully most of this can be buried away in a pata-errata.c 8)

    :-)

    few more:
    - Power Management for devices
    - 32 bit I/O support
    - Multiple Mode PIO support
    - Host Protected Area support
    (can be done from user-space but "coldplug" is needed)
    - ide-{cd,disk,floppy,tape}.c specific quirks
    -
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