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Nand Flash in IMX6ULL EVK

Question asked by crcn on Jun 19, 2017
Latest reply on Jan 17, 2018 by crcn


I'm using IMX6ULL EVK and mount one Nand Flash (TC58NVG2SOHTA00).

By default the kit have mounted the SDcard and one NOR.

To support the nand:

   >> add UBOOT_CONFIG = "nand" to local.conf.

   >> change imx6ull-14x14-evk.dts

&gpmi {

pinctrl-names = "default";
    pinctrl-0 = <&pinctrl_gpmi_nand_1>;
    status = "okay";


&iomuxc {
    imx6ull-evk-gpmi-rework {
        pinctrl_gpmi_nand_1: gpmi-nand-1 {
            fsl,pins = <
                MX6UL_PAD_NAND_CLE__RAWNAND_CLE         0xb0b1
                MX6UL_PAD_NAND_ALE__RAWNAND_ALE         0xb0b1
                MX6UL_PAD_NAND_WP_B__RAWNAND_WP_B       0xb0b1
                MX6UL_PAD_NAND_READY_B__RAWNAND_READY_B 0xb000
                MX6UL_PAD_NAND_CE0_B__RAWNAND_CE0_B     0xb0b1
                MX6UL_PAD_NAND_CE1_B__RAWNAND_CE1_B     0xb0b1
                MX6UL_PAD_NAND_RE_B__RAWNAND_RE_B       0xb0b1
                MX6UL_PAD_NAND_WE_B__RAWNAND_WE_B       0xb0b1
                MX6UL_PAD_NAND_DATA00__RAWNAND_DATA00   0xb0b1
                MX6UL_PAD_NAND_DATA01__RAWNAND_DATA01   0xb0b1
                MX6UL_PAD_NAND_DATA02__RAWNAND_DATA02   0xb0b1
                MX6UL_PAD_NAND_DATA03__RAWNAND_DATA03   0xb0b1
                MX6UL_PAD_NAND_DATA04__RAWNAND_DATA04   0xb0b1
                MX6UL_PAD_NAND_DATA05__RAWNAND_DATA05   0xb0b1
                MX6UL_PAD_NAND_DATA06__RAWNAND_DATA06   0xb0b1
                MX6UL_PAD_NAND_DATA07__RAWNAND_DATA07   0xb0b1


I program the micro with MFG TOOLS, and I have this debug in uboot:


U-Boot 2016.03-imx_v2016.03_4.1.15_2.0.0_ga+g0ec2a01 (Jun 16 2017 - 14:51:48 +0200)

CPU: Freescale i.MX6ULL rev1.0 at 396MHz
CPU: Commercial temperature grade (0C to 95C) at 43C
Reset cause: POR
Board: MX6ULL 14x14 EVK
I2C: ready
DRAM: 512 MiB
NAND: 512 MiB
cannot support the NAND, missing necessary info
Display: TFT43AB (480x272)
Video: 480x272x24
In: serial
Out: serial
Err: serial
Net: FEC1
Normal Boot
Hit any key to stop autoboot: 0


Why u-boot don't recognize the nand (cannot support the NAND, missing necessary info)?


Another question, the environments variables from u-boot are saved in address 0x3c00000 (by default).

I need to change one of them in userspace, so I try to install u-boot-fw-utils and have this error:

Can't find default configuration "arch/../configs/mx6ull_14x14_evk_nand_defconfig"!

It seems that u-boot-fw-utils don support imx6ull? It's true?


So I tried to read/write the flash in that direction (nanddump and nandwrite command) and I see correct values until position 0x3c000200. After this position the data seems to be corrupted. See attachment..


If read/write in another direction (for example 0x3e000000) I don't have this issue. Why this happens?








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