Digi CCWMX53

[Russell Haley]

Warner,

I was looking for a Digi reference but it turns out the Nand Flash
Controller is part of the Freescale Processor. Here is the link to the
Reference Manual:

cache.freescale.com/files/32bit/doc/ref_manual/iMX53RM.pdf

The NAND Flash Controller is in Chapter 51 page 3571 to page 3647.

Is this relevant to what you are looking at doing?
https://wiki.freebsd.org/NAND

I also found something called CHFS for NetBSD that looks interesting:
http://chewiefs.sed.hu/home

Thanks,
Russ







On Thu, Oct 2, 2014 at 2:34 PM, Warner Losh <imp at bsdimp.com> wrote:

>
> On Oct 1, 2014, at 12:48 AM, Russell Haley <russ.haley at gmail.com> wrote:
>
> > Warner,
> >
> > First, I was just watching your 2010 talk on supporting FreeBSD in a
> commercial environment. Has there been any updates in the process of
> maintaining a commercial branch in the last 4 years (not that I have any
> commercial ventures yet! lolz)?
> >
> > Anyway, I talked to an Engineer about the NAND controller spec and he
> chided me for being naive (poor little software developer, in way over his
> head. tisk tisk). He mentioned a FIVE THOUSAND page reference manual, which
> I have yet to find on the Digi site.
>
> URL + section number. 5k pages doesn’t necessarily mean it will be useful,
> though. :(
>
> > I have however found this hardware reference:
> >
> > http://ftp1.digi.com/support/documentation/90001270_E.pdf
> >
> > From Page 41:
> >
> > NAND flash memory
> > The ConnectCore for i.MX53 module provides 8GB of NAND flash memory. On
> the module in
> > the development kits a 512MByte, 2Kbyte page, NAND flash chip is used.
> This NAND flash
> > device is connected to NAND flash Chip Select 0.
> > The NAND flash controller signals are available on the module connectors.
>
> This basically says nothing more useful than “There’s NAND on this board
> that’s 4Gbits on CS0.” which is useful, but far from sufficient. How do I
> program the DMA so that ECC is added to the OOB areas of that NAND? How do
> I set different ECC tables? How do I do ECC error correction and detection?
> If you can’t answer that sort of question from the docs you have, then they
> aren’t helpful enough.
>
> > There are pin references to NAND further down in the section "GPIO
> multiplexing table in the ConnectCore for i.MX53 module" on page 44 and 49.
> >
> > I fear this is not the information we are looking for.
>
> Not really. The GPIO info might be mildly helpful in a few cases
>
> > I have found another u-boot fork for the CCWMX53 on github here:
> https://github.com/Varcain/uboot-ccwmx53-digi
> >
> > With what seems to be the information about booting from NAND here:
> https://github.com/Varcain/uboot-ccwmx53-digi/tree/master/nand_spl
> >
> > If you can let me know what I am looking for I can both ask a more
> directed question at work and also perform a better search.
> >
> > I have also started looking over the Architecture handbook as well
> because I have a feeling there is going to be lots of driver code in my
> future.
>
> A good first step would be to get a URL or search string to get the URL
> for that big spec. It is of the right size to possibly be useful, but
> sometimes really long specs have 1-2 page descriptions of things like the
> SD controller or the NAND controller that you need special NDAs + business
> arrangements to get, so it is hard to say…
>
> Warner
>
> >
> > On Sun, Sep 28, 2014 at 12:12 AM, Warner Losh <imp at bsdimp.com> wrote:
> >
> > On Sep 27, 2014, at 9:49 PM, Russell Haley <russ.haley at gmail.com> wrote:
> >
> > > I will attempt to load the kernel from tftp as soon as I can. I will
> need
> > > to figure out how to get ethernet to the unit.
> > >
> > > I know nothing about u-boot so forgive my ignorance but I was hoping to
> > > modify the Arndale configuration to work such as:
> > >
> > > # mmc read 1 0x70800000 0x800 0x1800;
> > > #go 0x70800000;
> > >
> > > and then point the rootfs to /dev/da1s1
> > >
> > > On another note, do you know where I could find out more about the
> missing
> > > MTD support?
> >
> > A spec for the NAND controller is needed to make that work…  Is one
> about?
> >
> > Warner
> >
> >
> > > BTW, I thought your wireless mesh stuff was pretty cool. Ah, so many
> cool
> > > projects, so little time...
> > >
> > > Thanks,
> > >
> > > Russ
> > >
> > > On Sat, Sep 27, 2014 at 2:35 PM, Rui Paulo <rpaulo at me.com> wrote:
> > >
> > >> On Sep 27, 2014, at 13:31, Russell Haley <russ.haley at gmail.com>
> wrote:
> > >>>
> > >>> Rui,
> > >>>
> > >>> So no MTD means the NAND on the SOM is out, but can I boot the kernel
> > >> and load rootfs from the microSD, like in this example:
> > >>>      •
> > >>> ARNDALE5250 # setenv bootcmd "fatload mmc 0:1 0x40f00000 kernel.bin;
> go
> > >> 0x40f00000"
> > >>>
> > >>> ARNDALE5250 # saveenv
> > >>>
> > >>> ARNDALE5250 # boot
> > >>
> > >> You can't use the Arndale config since the load addresses are
> different.
> > >> You should be able to load a kernel from the network.  Can you do
> that?
> > >>
> > >> --
> > >> Rui Paulo
> > >>
> > >>
> > >>
> > >>
> > > _______________________________________________
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> > > http://lists.freebsd.org/mailman/listinfo/freebsd-arm
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> >
> >
>
>