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Re: IP32: serial console broken with current git

To: Ricardo Mendoza <ricmm@kanux.com>
Subject: Re: IP32: serial console broken with current git
From: Ralf Baechle <ralf@linux-mips.org>
Date: Wed, 26 Sep 2007 13:02:37 +0100
Cc: Martin Michlmayr <tbm@cyrius.com>, linux-mips@linux-mips.org
In-reply-to: <46F93692.4050801@kanux.com>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <20070925182453.GA15749@deprecation.cyrius.com> <46F93692.4050801@kanux.com>
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.5.14 (2007-02-12)
On Tue, Sep 25, 2007 at 12:25:54PM -0400, Ricardo Mendoza wrote:

> Martin Michlmayr wrote:
> > With current git (and 2.6.23-rc1), nothing shows up on the serial
> > console on IP32.  Ricardo Mendoza commented on this on IRC:
> > 
> >> I think it was that using iobase member in the plat_serial8250_port
> >> struct was not working, swapping to membase gave console messages
> >> but kind of stopped printing messages at some point (further in than
> >> first line of C tho)
> > 
> > He also sent me a patch to test.  With this patch, I get serial
> > console output - but only until:
> > 
> > | Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled
> > | serial8250.0: ttyS0 at MMIO 0x0 (irq = 53) is a 16550A
> > | console [ttyS0] enabled
> > 
> > Maybe Ricardo can post his patch for comments and someone can look
> > into the second issue.
> 
> 
> The patch is the following, please ignore the rewrite of the MACE_PORT
> specifications, those are not needed (I don't remember why I did that at
> all).
> 
> As Martin said, the output stops on the 'console [ttyS0] enabled'
> message. I don't know much about the serial code internals but I presume
> something is getting trashed on the console setup.. or perhaps it's just
> something really dumb like a missing call or something. Someone
> enlightened in the issue can perhaps shed a light.

The membase part of it looks right.

  Ralf

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