On Mon, 7 Apr 2008, Michael Schmitz wrote:
> > Is it possible to detect the presence of Atari ROM port adapters?
>
> That depends - what happens if you read from the ROM port with nothing
> attached? I'll have to try. From memory, when I accidentially disconnected the
> ROM port adapter, the EtherNEC module just got stuck and required a reload. No
> kernel panic or other errors (tx timeouts aside). So I guess a simple read
> test is not going to cut it. I'm not sure whether we can use ARAnyM to check
> this - should accessing an empty ROM port generate a kernel bus error, and
> will ARAnyM do this? Petr?
>
> Something akin to the ISA ethercard probe should work, though. Is there some
> way to explicitly test for presence of _any_ ISA card in a given slot, or at a
> given IO address?
>
> > Currently a kernel with support for multiple ISA types cannot use Atari
> > ROM port ISA, as arch/m68k/kernel/setup.c has no support to set isa_type
> > dynamically if MULTI_ISA is defined.
>
> The conflict is with Q40, right? Do these boxes also have a ROM port?
> Otherwise we could fix that by using something from the bootinfo, or make it
> depend on the precise kind of Atari model detected in atari/config.c ...

In the mean time, I changed it to the code below, as the Ethernec probe gave me
NULL pointer dereferences in isa_inb() for multi-platform kernels:

/* set ISA defs early as possible */
#if defined(CONFIG_ISA) && defined(MULTI_ISA)
        if (MACH_IS_Q40) {
                isa_type = ISA_TYPE_Q40;
                isa_sex = 0;
        }
#ifdef CONFIG_GG2
        if (MACH_IS_AMIGA && AMIGAHW_PRESENT(GG2_ISA)) {
                isa_type = ISA_TYPE_GG2;
                isa_sex = 0;
        }
#endif
#ifdef CONFIG_AMIGA_PCMCIA
        if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
                isa_type = ISA_TYPE_AG;
                isa_sex = 1;
        }
#endif
#ifdef CONFIG_ATARI_ROM_ISA
        if (MACH_IS_ATARI) {
                isa_type = ISA_TYPE_ENEC;
                isa_sex = 0;
        }
#endif
#endif

And ARAnyM doesn't seem to complain...

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linu...

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
    -- Linus Torvalds
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