RE: FW: Barebox on Karo TX25

From: John Parker <John.Parker@lucyautomation.co.uk>
To: Sascha Hauer <s.hauer@pengutronix.de>,
	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: "barebox@lists.infradead.org" <barebox@lists.infradead.org>
Subject: RE: FW: Barebox on Karo TX25
Date: Thu, 19 Dec 2013 14:14:21 +0000	[thread overview]
Message-ID: <EAF1F21DA385DA4797F21C5DCAEF6BAC46810F1D99@AUTOSERVER1.auto.local> (raw)
In-Reply-To: <20131205152456.GT24559@pengutronix.de>

> -----Original Message-----
> From: Sascha Hauer [mailto:s.hauer@pengutronix.de]
> Sent: 05 December 2013 15:25
> To: Jean-Christophe PLAGNIOL-VILLARD
> Cc: John Parker; barebox@lists.infradead.org
> Subject: Re: FW: Barebox on Karo TX25
> 
> On Tue, Dec 03, 2013 at 08:01:26PM +0100, Jean-Christophe PLAGNIOL-
> VILLARD wrote:
> > On 10:26 Tue 03 Dec     , Sascha Hauer wrote:
> > > BTW Please don't top-post.
> > >
> > > On Mon, Dec 02, 2013 at 09:13:31AM +0000, John Parker wrote:
> > > > Hi again
> > > >
> > > > So now my problem is that I really could do with the LED and UBIFS stuff
> that happened since February.
> > > >
> > > > Should I try to fix mx25 in the latest code, or undo the problematic
> commit?
> > >
> > > Well preferably you should fix the latest code and send a patch to
> > > make it work again ;) However, that could become tricky. For doing
> > > so the patch to enable the debug UART early may become useful. With
> > > this you can use putc_ll and puthex_ll in early code.
> > >
> > > I did some investigation. What happens here is really strange. First
> > > I added a missing instruction cache invalidation. That alone doesn't
> > > fix the problem. Inserting a nop fixes booting for me, see the
> > > attached patch. If I move the nop up in the code it still works. If
> > > I move it down, then the board does not work. I have no idea what's
> > > happening here :(
> >
> > could be that the sdram controler need times to stabelized and that
> > you miss a delay for this
> 
> I thought about this aswell, but I don't believe that a single nop could make
> such a reproducable difference. I tried all this with JTAG debugging aswell
> which should make all timing issues vanish.
> 
> Sascha
> 

Hi again

Sorry for the delay coming back on this.

I was able to get the 2013.02 release working well on the tx25 and have made a huge amount of progress.

I have even automated the replacement of Redboot with Barebox!

In the New Year I will try your patch on the latest code and let you know how I get on.

Once again , many thanks all.

Seasons Greetings and Happy New Year to you all.

Kind regards

John

_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox