* Re: What ISA hardware is integrated into m68k bridges
2012-05-20 16:31 What ISA hardware is integrated into m68k bridges Paul Gortmaker
@ 2012-05-20 21:10 ` Michael Schmitz
2012-05-22 13:52 ` Paul Gortmaker
2012-05-21 1:35 ` Finn Thain
2012-05-22 19:52 ` Geert Uytterhoeven
2 siblings, 1 reply; 6+ messages in thread
From: Michael Schmitz @ 2012-05-20 21:10 UTC (permalink / raw)
To: Paul Gortmaker; +Cc: Geert Uytterhoeven, linux-m68k, Alan Cox
Paul,
On Mon, May 21, 2012 at 4:31 AM, Paul Gortmaker
<paul.gortmaker@windriver.com> wrote:
> Hi Geert,
>
> A discussion is underway with respect to the future of the various ISA
> drivers[1], and Alan suggested checking with the m68k folks:
>
> Check with the M68K people however. 3c501 won't matter to them but I'm
> not sure which of the other chips ended up on Amiga ISA bridges. I know
> NE2000 clones did.
>
> I know you've currently got that "almost ne2k" driver that runs IRQ-less. Are
> there other "ISA-like" onboard devices in the M68k harware scope that rely on
> existing (x86) ISA drivers?
Not sure it's still considered ISA based in its current state, but the
smc91x is another one used on Atari. That one's got an interrupt
though, and I had confirmation that it works fine from a user just a
few days ago.
You mentioned the IRQ-less ne2k already - making that one run on
netpoll has stalled for now because I'm too busy at work. Neither
driver has been merged mainstream yet.
Most of the Amiga cards are 8390 or Lance based IIRC (there's a Lance
based Atari driver as well!) but these do not share code with the ISA
Lance drivers as far as I can see. Geert may know more details.
Cheers,
Michael
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: What ISA hardware is integrated into m68k bridges
2012-05-20 21:10 ` Michael Schmitz
@ 2012-05-22 13:52 ` Paul Gortmaker
2012-05-23 8:51 ` Michael Schmitz
0 siblings, 1 reply; 6+ messages in thread
From: Paul Gortmaker @ 2012-05-22 13:52 UTC (permalink / raw)
To: Michael Schmitz; +Cc: Geert Uytterhoeven, linux-m68k, Alan Cox
On 12-05-20 05:10 PM, Michael Schmitz wrote:
> Paul,
>
> On Mon, May 21, 2012 at 4:31 AM, Paul Gortmaker
> <paul.gortmaker@windriver.com> wrote:
>> Hi Geert,
>>
>> A discussion is underway with respect to the future of the various ISA
>> drivers[1], and Alan suggested checking with the m68k folks:
>>
>> Check with the M68K people however. 3c501 won't matter to them but I'm
>> not sure which of the other chips ended up on Amiga ISA bridges. I know
>> NE2000 clones did.
>>
>> I know you've currently got that "almost ne2k" driver that runs IRQ-less. Are
>> there other "ISA-like" onboard devices in the M68k harware scope that rely on
>> existing (x86) ISA drivers?
>
> Not sure it's still considered ISA based in its current state, but the
> smc91x is another one used on Atari. That one's got an interrupt
> though, and I had confirmation that it works fine from a user just a
> few days ago.
>
> You mentioned the IRQ-less ne2k already - making that one run on
> netpoll has stalled for now because I'm too busy at work. Neither
> driver has been merged mainstream yet.
>
> Most of the Amiga cards are 8390 or Lance based IIRC (there's a Lance
> based Atari driver as well!) but these do not share code with the ISA
> Lance drivers as far as I can see. Geert may know more details.
Thanks Michael for the level headed on-topic reply, I appreciate
it. That smc is used by 20-odd arm defconfigs, so it really isn't
valid to consider it as a stand alone ISA card used just by older
x86 hardware with ISA bus. In fact I'm not sure it ever shipped as
a standalone ISA card...
Paul.
>
> Cheers,
>
> Michael
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: What ISA hardware is integrated into m68k bridges
2012-05-22 13:52 ` Paul Gortmaker
@ 2012-05-23 8:51 ` Michael Schmitz
0 siblings, 0 replies; 6+ messages in thread
From: Michael Schmitz @ 2012-05-23 8:51 UTC (permalink / raw)
To: Paul Gortmaker; +Cc: Michael Schmitz, Geert Uytterhoeven, linux-m68k, Alan Cox
Hi Paul,
On 23/05/12 01:52, Paul Gortmaker wrote:
>> Not sure it's still considered ISA based in its current state, but the
>> smc91x is another one used on Atari. That one's got an interrupt
>> though, and I had confirmation that it works fine from a user just a
>> few days ago.
> Thanks Michael for the level headed on-topic reply, I appreciate
> it. That smc is used by 20-odd arm defconfigs, so it really isn't
> valid to consider it as a stand alone ISA card used just by older
> x86 hardware with ISA bus. In fact I'm not sure it ever shipped as
> a standalone ISA card...
Just the infamous NE2000 clone then for Atari (RTL8019AS is what it
reads on the ISA card hanging off the ROM port of my Falcon).
Cheers,
Michael
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: What ISA hardware is integrated into m68k bridges
2012-05-20 16:31 What ISA hardware is integrated into m68k bridges Paul Gortmaker
2012-05-20 21:10 ` Michael Schmitz
@ 2012-05-21 1:35 ` Finn Thain
2012-05-22 19:52 ` Geert Uytterhoeven
2 siblings, 0 replies; 6+ messages in thread
From: Finn Thain @ 2012-05-21 1:35 UTC (permalink / raw)
To: Paul Gortmaker; +Cc: Geert Uytterhoeven, linux-m68k, Alan Cox
> [1] http://patchwork.ozlabs.org/patch/160144/
>
That thread makes it pretty clear that you don't like the presence of a
certain NIC driver, because you don't like limited hardware, and because
you personally have no need of neither.
But, nowhere in that thread is there any reason given for piecemeal ISA
removal: Alan asked "So, should we dump ISA?" after suggesting "Removing
[the NIC driver] because nobody is running one even in a museum might be a
good reason".
So, I wonder, how will you ascertain that there are no users of this code
you've targetted?
Finn
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: What ISA hardware is integrated into m68k bridges
2012-05-20 16:31 What ISA hardware is integrated into m68k bridges Paul Gortmaker
2012-05-20 21:10 ` Michael Schmitz
2012-05-21 1:35 ` Finn Thain
@ 2012-05-22 19:52 ` Geert Uytterhoeven
2 siblings, 0 replies; 6+ messages in thread
From: Geert Uytterhoeven @ 2012-05-22 19:52 UTC (permalink / raw)
To: Paul Gortmaker; +Cc: linux-m68k, Alan Cox
Hi Paul,
On Sun, May 20, 2012 at 6:31 PM, Paul Gortmaker
<paul.gortmaker@windriver.com> wrote:
> A discussion is underway with respect to the future of the various ISA
> drivers[1], and Alan suggested checking with the m68k folks:
>
> Check with the M68K people however. 3c501 won't matter to them but I'm
> not sure which of the other chips ended up on Amiga ISA bridges. I know
> NE2000 clones did.
>
> I know you've currently got that "almost ne2k" driver that runs IRQ-less. Are
> there other "ISA-like" onboard devices in the M68k harware scope that rely on
> existing (x86) ISA drivers?
IIRC, the only m68k machines (supported by Linux) with ISA slots are:
- Q40/Q60, probably used with NE2000 cards only,
- Various Amiga bridgeboards, none of which are supported,
- Apollo DN, used with a 3Com 3c505 ISA Ethernet card (preferably the
version with an Apollo boot ROM), but the (changes to the existing) driver
never entered mainline, witnessed by the orphan APOLLO_ELPLUS config
option we removed a few years ago.
Apart from that, several "ISA" (Ethernet) chips were/are used, as
typically that's
the simplest solution to add peripheral support to a CPU local bus using a
minimum of glue logic.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
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
^ permalink raw reply [flat|nested] 6+ messages in thread