+ Yifeng Zhao On 2020/1/9 4:53, Johan Jonker wrote:
DISCLAIMER: Use at your own risk. Status: For testing only! Version: V1 Title: Enable RK3066 NANDC for MK808. The majority of Rockchip devices use a closed source FTL driver to reduce wear leveling. This patch serie proposes an experimental raw NAND controller driver for basic tasks in order to get the bindings and the nodes accepted for in the dts files. What does it do: On module load this driver will reserve its resources. After initialization the MTD framework will then try to detect the type and number of NAND chips. When all conditions are met, it registers it self as MTD device. This driver is then ready to receive user commands such as to read and write NAND pages. Test examples: # dd if-/dev/mtd0 of=dd.bin bs=8192 count=4 # nanddump -a -l 32768 -f nanddump.bin /dev/mtd0 Not tested: NANDC version 9. NAND raw write. RK3066 still has no support for Uboot. Any write command would interfere with data structures made by the boot loader. Etc. Problems: No bad block support. Most devices use a FTL bad block map with tags that must be located on specific page locations which is outside the scope of the raw MTD framework.
Hi Johan, I loop in the author of the original NANDC driver who is now gonna to develop a new version of NANDC driver in near future that supports more features like bad block supoort. Maybe he could share his TODO.
No partition support. A FTL driver will store at random locations and a linear user specific layout does not fit within the generic character of this basic driver. Etc. Chris Zhong (1): ARM: dts: rockchip: add nandc node for rk3066a/rk3188 Dingqiang Lin (2): arm64: dts: rockchip: add nandc node for px30 arm64: dts: rockchip: add nandc node for rk3308 Jianqun Xu (1): ARM: dts: rockchip: add nandc nodes for rk3288 Johan Jonker (2): dt-bindings: mtd: add rockchip nand controller bindings ARM: dts: rockchip: rk3066a-mk808: enable nandc node Jon Lin (1): ARM: dts: rockchip: add nandc node for rv1108 Wenping Zhang (1): ARM: dts: rockchip: add nandc node for rk322x Yifeng Zhao (1): mtd: nand: raw: add rockchip nand controller driver Zhaoyifeng (1): arm64: dts: rockchip: add nandc node for rk3368 .../devicetree/bindings/mtd/rockchip,nandc.yaml | 78 ++ arch/arm/boot/dts/rk3066a-mk808.dts | 9 + arch/arm/boot/dts/rk322x.dtsi | 11 + arch/arm/boot/dts/rk3288.dtsi | 24 + arch/arm/boot/dts/rk3xxx.dtsi | 11 + arch/arm/boot/dts/rv1108.dtsi | 11 + arch/arm64/boot/dts/rockchip/px30.dtsi | 15 + arch/arm64/boot/dts/rockchip/rk3308.dtsi | 11 + arch/arm64/boot/dts/rockchip/rk3368.dtsi | 12 + drivers/mtd/nand/raw/Kconfig | 8 + drivers/mtd/nand/raw/Makefile | 1 + drivers/mtd/nand/raw/rockchip_nandc.c | 1224 ++++++++++++++++++++ 12 files changed, 1415 insertions(+) create mode 100644 Documentation/devicetree/bindings/mtd/rockchip,nandc.yaml create mode 100644 drivers/mtd/nand/raw/rockchip_nandc.c -- 2.11.0 _______________________________________________ Linux-rockchip mailing list Linux-rockchip@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-rockchip
