[U-Boot] [PATCH 0/7] sunxi: Add support for the CHIP Pro

Heiko Schocher
2016-11-09T07:47:12Z

Hello Maxime,

Am 08.11.2016 um 17:21 schrieb Maxime Ripard:
> 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.

What was the problem?

>
> Let me know what you think,
> Maxime
>
> Boris Brezillon (1):
> mtd: nand: add support for the TC58NVG2S0H chip
>
> Hans de Goede (1):
> sunxi: Enable UBI and NAND support
>
> Maxime Ripard (5):
> sunxi: Sync GR8 DTS and AXP209 with the kernel
> tools: sunxi: Add spl image builder
> nand: sunxi: Add options for the SPL NAND configuration
> scripts: sunxi: Build an raw SPL image
> sunxi: Add support for the CHIP Pro
>
> Makefile | 3 +-
> arch/arm/dts/Makefile | 1 +-
> arch/arm/dts/axp209.dtsi | 6 +-
> arch/arm/dts/ntc-gr8-chip-pro.dts | 266 +++++++-
> arch/arm/dts/ntc-gr8.dtsi | 1132 ++++++++++++++++++++++++++++++-
> configs/CHIP_pro_defconfig | 27 +-
> drivers/mtd/nand/Kconfig | 16 +-
> drivers/mtd/nand/nand_ids.c | 3 +-
> include/configs/sunxi-common.h | 26 +-
> scripts/Makefile.spl | 12 +-
> tools/.gitignore | 1 +-
> tools/Makefile | 1 +-
> tools/sunxi-spl-image-builder.c | 1113 +++++++++++++++++++++++++++++-
> 13 files changed, 2603 insertions(+), 4 deletions(-)
> create mode 100644 arch/arm/dts/ntc-gr8-chip-pro.dts
> create mode 100644 arch/arm/dts/ntc-gr8.dtsi
> create mode 100644 configs/CHIP_pro_defconfig
> create mode 100644 tools/sunxi-spl-image-builder.c
>
> base-commit: d8bdfc80da39211d95f10d24e79f2e867305f71b

Can you please add a README file, where the above things are explained?

Thanks!

bye,
Heiko
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