[U-Boot] uboot-v2 NAND erase problem

[景文林]

Hi,

I complie uboot-v2 (use pcm038_defconfig) for my own imx27 board.
My nand flash is sansung K9F1G08R0A  2k page 8 bit nand

loadb and tftp functions work well and uboot can boot up linux kernel
correctly
But I when I erased /dev/nan0.kernel.bb  and reburn uImage
I got this error:

Hit any key to stop autoboot:  0
could not read: error -74

Does anybody know why?

BTW in nand flash driver I used
static struct nand_ecclayout nand_hw_eccoob_2k = {
      .eccbytes = 36,
      .eccpos = {
          7, 8, 9, 10, 11, 12, 13, 14, 15,
          23, 24, 25, 26, 27, 28, 29, 30, 31,
          39, 40, 41, 42, 43, 44, 45, 46, 47,
          55, 56, 57, 58, 59, 60, 61, 62, 63,
      },
      .oobfree = {
          {2, 5},
          {16, 7},
          {32, 7},
          {48, 7},
      },
};

this->ecc.size = 512;
this->ecc.bytes = 9;
this->ecc.layout = &nand_hw_eccoob_2k;

When I programmed uImage and rootfs ,I reset the board uboot echos lots of
BADBLOCK.