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 <ja...@openedev.com> wrote: > > On Tue, Nov 22, 2016 at 6:08 PM, Maxime Ripard > > <maxime.rip...@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 <ja...@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
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