From: Takashi Oe <toe@unlserve.unl.edu>
To: Benjamin Herrenschmidt <bh40@calva.net>
Cc: Paul.Mackerras@cs.anu.edu.au, linuxppc-dev@lists.linuxppc.org
Subject: Re: update on macserial/DMA
Date: Wed, 6 Oct 1999 08:47:03 -0500 (CDT) [thread overview]
Message-ID: <Pine.LNX.3.96LJ1.1b7.991006082634.2962A-100000@ofey.inetnebr.com> (raw)
In-Reply-To: <19991006103527.016707@mailhost.mipsys.com>
On Wed, 6 Oct 1999, Benjamin Herrenschmidt wrote:
> It breaks (crash) on the wallstreet's internal modem. The reason is that
> this machines has two SCCs (4 channels) but the device tree only declares
> channel A on the second SCC (so we have only 3 channels visible). This
I see. That would be a problem.
> breaks the channel cross-references you use to access channel B's
> registers. I'll try to make a simple fix if I find some time today and I
> think I'll just rewrite the probe code by the end of the week or next
> week end since it's too much dependent on the device tree layout.
I've just tried your fix, and, as expected, it causes no harm for PMac
7600. Thanks. It's not a big problem, but I think we don't want the
"fake" channel to take up "/dev/ttyS3" or such in case another serial
driver is to be used concurrently.
>
> BTW. Paul: The patches on my test page (url below + .../test.html)
> include among other things support for the PowerBooks 3400/3500
> ethernet/modem combo interrupt. It looks like there is a second ohare
> chip with cascaded interrupt controller either in the combo itself or on
> the motherboard (or a chip that mimmics the ohare chip). It's not
> referenced by name in the device tree but by vendorid/deviceid. I'm
> wondering if it might contains also an SCC cell for the modem but I can't
> test, I don't have access to one of those machines. I think you have a
> 3400, don't you ? I'll make sure my new probe code can easily be used to
I think ehternet/modem combo is only for the US model of PowerBook
3400/3500. If Paul had it, the combo should be working a long ago. :)
> declare SCC cells for this kind of cases (but just passing the addresses
> in) just in case...
>
Takashi Oe
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~1999-10-06 13:47 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <37F1AD4B.585E99AB@chpc.utah.edu>
1999-09-29 7:11 ` [Fwd: Bug: 2.2.12 still hangs PPC after some PPP activity] Geert Uytterhoeven
1999-09-29 7:16 ` Takashi Oe
1999-09-29 7:40 ` Geert Uytterhoeven
1999-09-29 9:13 ` Benjamin Herrenschmidt
1999-09-30 0:46 ` Takashi Oe
1999-09-30 8:50 ` Benjamin Herrenschmidt
1999-09-30 16:21 ` Takashi Oe
1999-09-30 16:35 ` Benjamin Herrenschmidt
1999-10-06 5:33 ` update on macserial/DMA Takashi Oe
1999-10-06 8:35 ` Benjamin Herrenschmidt
1999-10-06 13:47 ` Takashi Oe [this message]
1999-10-06 16:25 ` Benjamin Herrenschmidt
1999-10-06 16:50 ` Benjamin Herrenschmidt
1999-10-08 7:13 ` Lou Langholtz
1999-10-09 17:57 ` Lou Langholtz
[not found] ` <Pine.LNX.3.96LJ1.1b7.991005234830.1210A-100000@ofey.inetne br.com>
1999-10-07 9:48 ` Franz Sirl
1999-10-07 15:37 ` phandel
1999-10-12 7:20 ` [Fwd: Bug: 2.2.12 still hangs PPC after some PPP activity] Lou Langholtz
1999-09-29 16:44 ` Lou Langholtz
1999-09-29 17:02 ` Benjamin Herrenschmidt
1999-09-29 18:08 ` Lou Langholtz
1999-09-29 18:46 ` Lou Langholtz
1999-09-29 20:00 ` Lou Langholtz
1999-09-30 1:14 ` Takashi Oe
1999-09-30 5:33 ` Geert Uytterhoeven
1999-10-01 13:26 ` Franz Sirl
1999-10-01 13:46 ` Alvin Brattli
[not found] ` <Pine.OSF.3.96.991001153658.16772E-100000@mitra.phys.uit.no >
1999-10-01 14:08 ` Franz Sirl
1999-10-01 16:14 ` Lou Langholtz
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