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    SubjectRe: [PATCH] yenta: irq-routing for TI bridges
    Date
    [removing akpm from cc as it is pcmcia centric]

    On Tuesday 24 February 2004 13:40, Russell King wrote:
    > On Tue, Feb 24, 2004 at 12:59:50PM +0100, Daniel Ritz wrote:
    > > there's another bug btw. one that is probably never hit and harmless too:
    > > rmk's notbook has parellel isa interrupts, INTA is _not_ routed.
    >
    > Not true. It has parallel ISA interrupts _and_ parallel PCI interrupts.
    > It's a TI 1250. Unfortunately, the 1250 data sheet isn't available,
    > however there seems to be some consistency in the device codes to
    > features offered.

    ok, i see the 1250, 1450 are different. the 1410/1520 doc says nothing about it.
    did i miss something about the 1410/1520/etc ?

    >
    > The 1450 and 1251A (both of which seem similar to 1250) has separate pins
    > for PCI parallel interrupts which are outside the control of the "IRQMUX"
    > register. When these pins are not used for parallel PCI interrupts,
    > they function as "GPIO3" and "IRQSER" (for PCI serial interrupts)
    > respectively. The function of these pins is controlled by the device
    > control register.
    >
    > Please note that "IRQMUX" is a misleading definition of the register in
    > question. The register programs various multifunction pins on the device
    > which _may_ be IRQ outputs, LED outputs, ZV switching outputs, audio, or
    > even GPIO.

    TI calls it Multifunction Routing Register for a reason :)

    so i think the safe way would be:
    - move routing code to 12xx_override()
    - first test interrupts, do nothing if working correct
    - try to reflect the settings in device control register, test again
    - fall back to pci if nothing works
    - handle the 125x/1450 by not touching MFUNC0
    - don't do INTB routing, set INTRTIE instead (on 2 slot chips)
    (- remove the bad code from 2.4 and do the same)

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