From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heiko Schocher Date: Wed, 9 Nov 2016 08:47:12 +0100 Subject: [U-Boot] [PATCH 0/7] sunxi: Add support for the CHIP Pro In-Reply-To: References: Message-ID: <5822D480.4040308@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de 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 -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany