NUC980 Cannot boot from SPI NAND when bad block

[hongduc10]

I have an issue when boot from SPI NAND flash. The windbond flash is bad block at 0,1,2,3 (block contained Uboot SPL) so system cannot boot.

Are there any solution?

[ychuang3]

Please provide enough information. The type name of SPI NAND, and how do you program the images. And please provide the complete boot meesage log in text.

[hongduc10]

SPI NAND: W25N01GV Programmer: Nu writer

This is actually the output of boot message.

If I program the image on the good PCBA or the NUC980-IIoT DK, the system can not (show the Uboot SPL log).

[ychuang3]

I just want make sure if the SPI-NAND bad block a false alram. Generally, manufacture should guarantee the NAND flash block 0 be a good block. NUC980 IBR (Internal Boot ROM) boots NAND flash based on this. If SPI-NAND flash block 0 is a bad block, NUC980 cannot boot from SPI.

[hongduc10]

Thank you @ychuang3,

May be I have to check the NAND flash.

I want to ask another case, when the bad block is at block I programed u-boot/uImage(kernel), is this handled by u-boot SPL/Uboot respectively?

[ychuang3]

As I know, bab blocks are flagged at manufacturing. In case of block 1 is a bad block, NuWriter should be able to detect and skip it when programming the flash. The SPL can detect and skip it, too. Logically, the block number are still contiguous, but physically skip the bad blocks.

[hongduc10]

Thank you @ychuang3 let me check more about the reason why the SPI NAND have bad block on block 0

[hongduc10]

Hi @ychuang3, I have found the different part number of SPI NAND Flash

NUC980 IIoT-DK: W25N01GVZEIT (BUF=1 Buffer Read Mode, default when power up, BUF can be written to 0) Our PCBA: W25N01GVZEIG (BUF=0 Continuous Read Mode, default when power up, BUF can be written to 1)

So by default, NUC980 Boot ROM will only handle BUF=1 Buffer Read Mode ?

[ychuang3]

Yes, NUC980 IBR support buffer mode only. Continuous read mode is not supported.

[hongduc10]

Thank you @ychuang3 .