[U-Boot] [PATCH v2 0/14] sunxi: Add support for the CHIP Pro

[Maxime Ripard]

On Mon, Dec 05, 2016 at 10:33:35PM +0100, Jagan Teki wrote:
> Hi Maxime,
> 
> On Sun, Dec 4, 2016 at 8:19 AM, Jagan Teki <jagan at openedev.com> wrote:
> > On Tue, Nov 22, 2016 at 6:08 PM, Maxime Ripard
> > <maxime.ripard at free-electrons.com> wrote:
> >> The CHIP Pro is a SoM made by NextThing Co, and that embeds a GR8 SIP, an
> >> AXP209 PMIC, a WiFi BT chip and a 512MB SLC NAND.
> >>
> >> Since the first Allwinner device coming whit an SLC NAND that doesn't have
> >> the shortcomings (and breakages) the MLC NAND has, we can finally enable
> >> the NAND support on a board by default.
> >>
> >> This is the occasion to introduce a bunch of additions needed imo to be
> >> able to come up with a sane NAND support for our users.
> >>
> >> The biggest pain point is that the BROM uses a different ECC and randomizer
> >> configuration than for the rest of the NAND. In order to lessen the number
> >> of bitflips, you also need to pad with random data the SPL image.
> >>
> >> Since it's quite tedious to do right (and most users won't be able to
> >> figure it out) and since if it is not done right, it will eventually turn
> >> into an unusable system (which is bad UX), we think that the best solution
> >> is to generate an SPL image that already embeds all this. We'll possible
> >> have to do the same thing for the U-Boot image (at least for the random
> >> padding) on MLC NANDs.
> >>
> >> The only drawback from that is that you need to flash it raw, instead of
> >> using the usual nand write, but it's just a different command, nothing
> >> major anyway.
> >>
> >> In order to flash it, from a device switched in FEL, on your host:
> >> sunxi-fel spl spl/sunxi-spl.bin
> >> sunxi-fel write 0x4a000000 u-boot-dtb.bin
> >> sunxi-fel write 0x43000000 spl/sunxi-spl-with-ecc.bin
> >> sunxi-fel exe 0x4a000000
> >>
> >> And on the board, once u-boot is running (assuming the NAND is already
> >> erased):
> >>
> >> nand write.raw.noverify 0x43000000 0 40
> >> nand write.raw.noverify 0x43000000 0x400000 40
> >>
> >> nand write 0x4a000000 0x800000 0xc0000
> >>
> >> I also encountered some weird bug in the private libgcc that prevents
> >> U-Boot from loading. Disabling CONFIG_USE_PRIVATE_LIBGCC fixes that.
> >>
> >> Let me know what you think,
> >> Maxime
> >>
> >> Changes from v1:
> >>   - Allowed to build lib/bch.c for the host, and used that in the image
> >>     builder
> >>   - Fixed a bug in the NAND driver
> >>   - Wrote a documentation on how to flash a NAND image on an Allwinner
> >>     board
> >>   - Fixed a few compilation breakages and issues
> >>   - Moved U-boot offset out of the config header and into Kconfig
> >>   - Moved the environment into UBI
> >>   - Moved the environment selection to Kconfig
> >>   - Moved the CMD_MTDPARTS options to Kconfig
> >>   - Provide MTDIDS_DEFAULT and MTDPARTS_DEFAULT options through Kconfig
> >>   - Added the tags from everyone
> >>
> >> Boris Brezillon (1):
> >>   mtd: nand: add support for the TC58NVG2S0H chip
> >
> > Will skip this, already in tree.
> >
> >>
> >> Hans de Goede (1):
> >>   sunxi: Enable UBI and NAND support
> >>
> >> Maxime Ripard (12):
> >>   nand: sunxi: Fix modulo by zero error
> >>   bch: Allow to build for the host
> >>   tools: sunxi: Add spl image builder
> >>   common: Move environment choice to Kconfig
> >>   cmd: Add Kconfig option for CMD_MTDPARTS and related options
> >>   mtd: sunxi: Select the U-Boot location config option
> >>   mtd: sunxi: Change U-Boot offset
> >>   sunxi: Add the default mtdids and mtdparts to our env
> >>   nand: sunxi: Add options for the SPL NAND configuration
> >>   scripts: sunxi: Build an raw SPL image
> >
> > Reviewed-by: Jagan Teki <jagan at openedev.com>
> >
> >>   sunxi: Sync GR8 DTS and AXP209 with the kerne
> >
> > Sent the review comments about this.
> >
> >>   sunxi: Add support for the CHIP Pro
> 
> Found many buildman issue with this series[1], please refer to
> master-next and let me know for if I miss any or fixes from you.
> 
> [1] https://paste.ubuntu.com/23585255/

Sorry, I haven't been able to work on this lately. Please ignore that
version for now, I will resubmit a v3 with this fixed.

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 801 bytes
Desc: not available
URL: <http://lists.denx.de/pipermail/u-boot/attachments/20161209/7e8fbbe7/attachment.sig>