Date: Thu, 2 Oct 2014 15:34:15 -0600 From: Warner Losh <imp@bsdimp.com> To: Russell Haley <russ.haley@gmail.com> Cc: freebsd-arm@freebsd.org, Rui Paulo <rpaulo@me.com> Subject: Re: Digi CCWMX53 Message-ID: <27A69721-D93D-4D4C-883A-718CFFF52B21@bsdimp.com> In-Reply-To: <CABx9NuROVKvAcqj166=z%2BvP5zemjost6m12H5fLvEbKU8%2BA0xw@mail.gmail.com> References: <CABx9NuQr%2BdEb_yj3ypEe6Sb_qPY%2BqP74n0x1K5=_K6Zoio2vkw@mail.gmail.com> <C439A1ED-8AA0-4CA5-B375-D80E8BD4C624@me.com> <CABx9NuTU=E7ceQ=5=Qk%2B=e9jwLjnJZf2Lr70d7XbwAYRD5nd7Q@mail.gmail.com> <E12E12A8-32B9-4B26-B6C4-65DF9F43C396@me.com> <CABx9NuT31dVubDCCt7M5DGhoNqu0a9saxuB1fb9naq42Z8mi%2BA@mail.gmail.com> <A73CCB0A-2ED9-4505-BACD-264F768D2D72@bsdimp.com> <CABx9NuROVKvAcqj166=z%2BvP5zemjost6m12H5fLvEbKU8%2BA0xw@mail.gmail.com>
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--Apple-Mail=_FF9DBD8C-C340-49CF-9711-79091376FF5C Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 On Oct 1, 2014, at 12:48 AM, Russell Haley <russ.haley@gmail.com> wrote: > Warner,=20 >=20 > 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)? >=20 > 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.=20 URL + section number. 5k pages doesn=92t necessarily mean it will be = useful, though. :( > I have however found this hardware reference: >=20 > http://ftp1.digi.com/support/documentation/90001270_E.pdf >=20 > =46rom Page 41: >=20 > 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 =93There=92s NAND on this = board that=92s 4Gbits on CS0.=94 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=92t answer that sort of = question from the docs you have, then they aren=92t 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.=20 >=20 > I fear this is not the information we are looking for.=20 Not really. The GPIO info might be mildly helpful in a few cases=20 > I have found another u-boot fork for the CCWMX53 on github here: = https://github.com/Varcain/uboot-ccwmx53-digi >=20 > With what seems to be the information about booting from NAND here: = https://github.com/Varcain/uboot-ccwmx53-digi/tree/master/nand_spl >=20 > 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.=20 >=20 > 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=85 Warner >=20 > On Sun, Sep 28, 2014 at 12:12 AM, Warner Losh <imp@bsdimp.com> wrote: >=20 > On Sep 27, 2014, at 9:49 PM, Russell Haley <russ.haley@gmail.com> = wrote: >=20 > > 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? >=20 > A spec for the NAND controller is needed to make that work=85 Is one = about? >=20 > Warner >=20 >=20 > > 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@me.com> wrote: > > > >> On Sep 27, 2014, at 13:31, Russell Haley <russ.haley@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: > >>> =95 > >>> 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 > >> > >> > >> > >> > > _______________________________________________ > > freebsd-arm@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-arm > > To unsubscribe, send any mail to = "freebsd-arm-unsubscribe@freebsd.org" >=20 >=20 --Apple-Mail=_FF9DBD8C-C340-49CF-9711-79091376FF5C Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQIcBAEBCgAGBQJULcTXAAoJEGwc0Sh9sBEAxykP/0UDuX7ExVELl8GHlFGHrc7R 5BvMUZg4r8/mhVJ77NGYmzKP1FijZXlp1QBUnamUZN192VI1GDSOGT+o2o+rpo/G /Bv66NzlLaPQycKdUUseNauETQeRhNrS8Kj8SmisZRDLMP3xv45zh6CjrQJ9bETZ +BZk1iUrea4ti/17JVLnZtTDJFaW2ghfI/49T/8POyP0VXH16gv3qpfAhVnDpl4+ 8DpiPfets/8CFPtB4aiWIg4bWLZ4BuKoLMLIHvLSTIRp6ySAGtqp/X5Jr0hyOBKY WshFmtHAQxtTjdz9v4Vnh1ygG3zm6+JMY3YjVhFPOMCJyeI8aNqXn2MA2WYOqeMv z9RMtZRtuTEroD6b93YLREZpFBdr4AMxI//TPBfOPemBnKfkapaLJhva0iGhmUGg /Lw3iwvPNkJOKycKlggqbq74VvRHA9fukOUWhtkK+G2HzfJUq7SUidCzEjmrQIxt LMrMQeSWgiQV757s6ZfAt23YqVUeClpIZAUiR6VlF3cPpL5sXLlpj9KOhVXyEQdC F7rhDQWSpBOcZucXtII95OrULDwjV2WCenUDODut2Lc+C22HArr4lJJGN8ux9ZRi AcSAqcxc0yrSLYKQjwnQxzGVrV4y600DzYF4GnpaBWt/Brvui27YDZuulkX1Bld9 ssWF6kh64JPhw2+dO/q1 =Qxg6 -----END PGP SIGNATURE----- --Apple-Mail=_FF9DBD8C-C340-49CF-9711-79091376FF5C--
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