[U-Boot] No NAND device found!!! Freescale MPC8544+SAMSUNG 1GB Nand Flash , please help!

[duckycool]

http://www.nabble.com/file/p25455541/nand_error.bmp nand_error.bmp Hi all,
  I can't do READID with nand_get_flash_type in the nand_base.c
  What I get is an error "No NAND device found!!!"
  My board is freescale mpc8544 with samsung K9K8G08U0A, the device is
supposed {NAND 1GiB 3,3V 8-bit",  0xD3, 0, 1024, 0, LP_OPTIONS} .

  What I did is copy the nand.c from /board/tqc/tqm85xx/nand.c into
/board/freescale/mpc8544ds
  Add #define CONFIG_CMD_NAND into MPC8544DS.h, setup TLB/LAW/BR/OR for nand
flash.
  Add RAM array of upm into /board/.../nand.c.

  When booting, I can get the chip select signal put low with scope.
  Trace the code, it get both dev_id and tmp_id 0x000000ff.

  Per the /driver/mtd/nand/nand_base.c , /driver/mtd/nand/fsl_upm.c , and
/board/.../nand.c ....
  I break down the upm operation into the upm control(mamr, mar, IO_ADDR_R,
IO_ADDR_W)
  And then, I tried the low level register control under CodeWarrior command
window, it's still failed.

  As below: (CCSRBR = 0xe0000000 , nand_flash_base = 0xff000000)
  change 0xe0005070 0x30000008 (OP=11, pattern_offset=8)
  change 0xe0005068 0x90000000
  change 0xff000000 0x0
  change 0xe0005070 0x0
  change 0xe0005070 0x30000010
  change 0xe0005068 0x00000000
  change 0xff000000 0x0
  change 0xe0005070 0x0
  change 0xe0005070 0x30000008
  change 0xe0005068 0x00000000
  change 0xff000000 0x0
  change 0xe0005070 0x0
  display 0xff000000

  I don't know why? 
  Any MARCO I should add ? 
  Or any special operation should I add into nand_base.c ? 
  Please help, thank you.
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