Hi guys,

 

I want to dump yaffs2's nand data with ioctl function. But the control param is fail for some devices, the code as so:
 
    struct nand_ecclayout ecc_layout;
    ret = ioctl(ctx->fd, ECCGETLAYOUT, &ecc_layout);

 

It return error message as so: Inappropriate ioctl for device.

Why?
 
Is there any other methods that i can get the ECC Layout data?

BR.
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yy.xue