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dm8148 nand flash BOOT HANGS

YL HE
Prodigy 30 points

 Flashing images to TI814X  NAND in SD boot， I   do it  by executing the following command：

1.  Flashing 1st stage to NAND from 2nd stage in SD boot

TI8148_EVM#mmc rescan 0
TI8148_EVM#mw.b 0x81000000 0xFF 0x20000
TI8148_EVM#fatload mmc 0 0x81000000 u-boot.min.nand
TI8148_EVM#nand erase 0x0 0x20000
TI8148_EVM#nand write.i 0x81000000 0x0 0x20000


2   Flashing 2nd stage to NAND from 2nd stage in SD boot

TI8148_EVM#mmc rescan 0
TI8148_EVM#mw.b 0x81000000 0xFF 0x60000
TI8148_EVM#fatload mmc 0 0x81000000 u-boot.bin
TI8148_EVM#nand erase 0x20000 0x60000
TI8148_EVM#nand write.i 0x81000000 0x20000 0x60000

There are no error messages are displayed the 1st /2nd stage of NAND boot has been successfully transferred to NAND.

but  i power down ,and power up the custom board ,  the  flash  BOOT HANGS and Stop at  "Starting application at 0x81000000' !!

our   Boot Mode Order  is : 10011

The message is below :

U-Boot 2010.06 (Oct 19 2015 - 20:12:15)

TI8148-GP rev 3.0

ARM clk: 600MHz
DDR clk: 400MHz

DRAM:  2 GiB
NAND:  HW ECC BCH8 Selected
256 MiB
Using default environment

The 2nd stage U-Boot will now be auto-loaded
Please do not interrupt the countdown till TI8148_EVM prompt if 2nd stage is already flashed
Hit any key to stop autoboot:  0

NAND read: device 0 offset 0x100000, size 0x40000
 262144 bytes read: OK
## Starting application at 0x81000000 ...


why .

  • 0
    Guru 11260 points
    Hello,

    What base release you took and what are the custom changes which you have done to your board ?
    What NAND flash chip are you using ?
    What cross compiler are you using ?

    Cheers,
    --Prabhakar Lad
  • 0 in reply to Prabhakar Lad
    Prodigy 30 points

    hi, Prabhakar Lad:

     Thank you for your reply.

               1. What base release you took and what are the custom changes which you have done to your board ?

                       I  took  the release TI81XX-LINUX-PSP-04.04.00.01,and the custom  have no change. and 16bit mode.

               2. What NAND flash chip are you using ?

            I'm using the MT29F2G16ABAEAWP-AITE.

    3.  What cross compiler are you using ?

            The cross compiler is "CROSS_COMPILE=arm-arago-linux-gnueabi-" .

    And  I   compile  the  MLO  and u-boot.bin built for SD using the same u-boot source , then  I copy the U-Boot image MLO built for 1st stage SD and u-boot.bin built for SD in the FAT partition on the SD card. the SD card  can run normally.

                 

      

  • 0
    Guru 11260 points
    Hello,

    Just to clarify you flashed proper copy of u-boot.bin to nand,
    Are these the exact steps which you followed ?
    TI8148_EVM#mmc rescan 0
    TI8148_EVM#mw.b 0x81000000 0xFF 0x60000
    TI8148_EVM#fatload mmc 0 0x81000000 u-boot.bin
    TI8148_EVM#nand erase 0x20000 0x60000
    TI8148_EVM#nand write.i 0x81000000 0x20000 0x60000

    If yes then you have flashed u-boot.bin which is created using ti8148_evm_config_sd which is for SD boot mode.
    You need to create 2nd stage bootloader using ti8148_evm_config_nand which is for NAND, create a folder in SD card and store these images separate and then flash them accordingly.

    For example:

    TI8148_EVM#mmc rescan 0
    TI8148_EVM#mw.b 0x81000000 0xFF 0x60000
    TI8148_EVM#fatload mmc 0 0x81000000 nand/u-boot.bin

    Cheers,
    --Prabhakar Lad