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AM335x evm always boot from NAND ( SD card problem)

Hafedh Haouala
Intellectual 315 points

Hi,

I'm unable to make the AM335x evm board boot from the SD-card. it always boot from the NAND ( see attached file for u-boot log)

I tried several DIP switches config but none ofthem seems to work. 

Here are the DIP switch configs I tried : 

http://processors.wiki.ti.com/index.php/AM335x_U-Boot_User%27s_Guide#Boot_Switch_Settings

http://processors.wiki.ti.com/index.php/TI-Android-ICS-4.0.3-DevKit-3.0.1_DevelopersGuide#Booting_the_Platform

http://processors.wiki.ti.com/index.php/AM335X_StarterWare_Booting_And_Flashing#Boot_Modes ( 11100 & 10111 )

And I'm aware that " ON is labeled on the wrong side of SW3 boot mode switch "

I really appreciate your help.

Thanks in advance.

B.R

  • 0
    TI__Mastermind 25235 points

    Hi Hafedh,

    I can't find the attached log file. Could you please attach it again?

    Best regards,
    Miroslav

  • 0
    Expert 1075 points

    Hi,

    Please set as mentioned below as its working on my AM335x EVM for SD boot.

    SW4 - switch pins towards ON side if mentioned else off side...

    1    2    3   4   5   6   7   8

    on on on on on on off on

    SW3 - switch pin towards ON side...

    1    2    3   4   5   6   7   8

    off off off on off on on on

     

  • 0 in reply to Miroslav Kiradzhiyski XID
    Intellectual 315 points

    Hi Miroslav,

    I was able to solve the problem "temporary" by erasing the NAND.

    So, here's the u-boot log for SD card DIP switches config.

    Thank you in advance.

    Best regards

    Fullscreen 3252.uboot_log.txt Download 
    U-Boot SPL 2011.09-00381-g6309768 (Mar 13 2013 - 14:41:38)                                           
Texas Instruments Revision detection unimplemented                                                   
Found a daughter card connected                                              
OMAP SD/MMC: 0                                                               
reading u-boot.img                                   
reading u-boot.img                                   
                                                     
                                                     
U-Boot 2011.09-00381-g6309768 (Mar 14 2013 - 13:22:41)
                                                     
I2C:   ready
DRAM:  256 MiB
WARNING: Caches not enabled
Found a daughter card connected
NAND:  HW ECC Hamming Code selected
256 MiB
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
Net:   cpsw
Hit any key to stop autoboot:  0 
Booting from nand ...
HW ECC BCH8 Selected

NAND read: device 0 offset 0x280000, size 0x500000
 5242880 bytes read: OK
## Booting kernel from Legacy Image at 81000000 ...
   Image Name:   Linux-3.2.0-gb02ab39
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    3574368 Bytes = 3.4 MiB
   Load Address: 80008000
   Entry Point:  80008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK

Starting kernel ...

  • 0 in reply to Vageesh KM
    Intellectual 315 points

    Hi,

    Vageesh KM said:

    SW4 - switch pins towards ON side if mentioned else off side...

    1    2    3   4   5   6   7   8

    on on on on on on off on

    SW3 - switch pin towards ON side...

    1    2    3   4   5   6   7   8

    off off off on off on on on

    This is the DIP switch config that I was using but I had to erase the NAND in order to

    make the board boot from the SD card.

    I don't know if it's the expected behavior or not .

    Best regards

  • 0 in reply to Hafedh Haouala
    TI__Mastermind 25235 points

    Hi Hafedh,

    It seems like your U-Boot is loaded from the SD-Card correctly, but the Kernel is then read from the NAND memory.

    What are the contents of your SD-Card?

    Please interrupt the U-Boot timer:

    Hit any key to stop autoboot:  3

    and post the results of the following command in U-Boot: print - this will print all the U-Boot environment settings.

    Best regards,
    Miroslav

  • 0 in reply to Miroslav Kiradzhiyski XID
    Intellectual 315 points

    Hi,

    I erased my NAND content so, I hope that the u-boot print command's output still relevant.

    Best Regards 

    Fullscreen 2818.uboot-log2.txt Download 
    U-Boot SPL 2011.09-00381-g6309768 (Mar 25 2013 - 17:04:06)
Texas Instruments Revision detection unimplemented
Found a daughter card connected
OMAP SD/MMC: 0
reading u-boot.img
reading u-boot.img


U-Boot 2011.09-00381-g6309768 (Mar 25 2013 - 17:04:06)

I2C:   ready
DRAM:  256 MiB
WARNING: Caches not enabled
Found a daughter card connected
NAND:  HW ECC Hamming Code selected
256 MiB
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
*** Warning - bad CRC, using default environment

Net:   cpsw
Hit any key to stop autoboot:  0 
U-Boot# print
autoload=yes
baudrate=115200
bootargs_defaults=setenv bootargs console=${console} ${optargs}
bootcmd=if mmc rescan; then echo SD/MMC found on device ${mmc_dev};if run loadbootenv; then echo Loaded environment from ${bootenv};run importbootenv;fi;if test -n $uenvcmd;
bootdelay=3
bootenv=uEnv.txt
bootfile=uImage
console=ttyO0,115200n8
ethact=cpsw
ethaddr=00:18:31:e0:a3:df
importbootenv=echo Importing environment from mmc ...; env import -t $loadaddr $filesize
ip_method=none
kloadaddr=0x80007fc0
loadaddr=0x82000000
loadbootenv=fatload mmc ${mmc_dev} ${loadaddr} ${bootenv}
mmc_args=run bootargs_defaults;setenv bootargs ${bootargs} root=${mmc_root} rootfstype=${mmc_root_fs_type} ip=${ip_method}
mmc_boot=run mmc_args; run mmc_load_uimage; bootm ${kloadaddr}
mmc_dev=0
mmc_load_uimage=fatload mmc ${mmc_dev} ${kloadaddr} ${bootfile}
mmc_root=/dev/mmcblk0p2 rw
mmc_root_fs_type=ext3 rootwait
nand_args=run bootargs_defaults;setenv bootargs ${bootargs} root=${nand_root} noinitrd rootfstype=${nand_root_fs_type} ip=${ip_method}
nand_boot=echo Booting from nand ...; run nand_args; nandecc hw 2; nand read.i ${kloadaddr} ${nand_src_addr} ${nand_img_siz}; bootm ${kloadaddr}
nand_img_siz=0x500000
nand_root=ubi0:rootfs rw ubi.mtd=7,2048
nand_root_fs_type=ubifs rootwait=1
nand_src_addr=0x280000
net_args=run bootargs_defaults;setenv bootargs ${bootargs} root=/dev/nfs nfsroot=${serverip}:${rootpath},${nfsopts} rw ip=dhcp
net_boot=echo Booting from network ...; setenv autoload no; dhcp; tftp ${kloadaddr} ${bootfile}; run net_args; bootm ${kloadaddr}
nfsopts=nolock
nor_args=run bootargs_defaults;setenv bootargs ${bootargs} root={nor_root} rootfstype=${nor_root_fs_type} ip=${ip_method}
nor_boot=echo Booting from NOR ...; run nor_args; cp.b ${0x08080000} ${kloadaddr} ${nor_img_siz}; bootm ${kloadaddr}
nor_img_siz=0x280000
nor_root=/dev/mtdblock3 rw
nor_root_fs_type=jffs2
nor_src_addr=0x08080000
rootpath=/export/rootfs
script_addr=0x81900000
spi_args=run bootargs_defaults;setenv bootargs ${bootargs} root=${spi_root} rootfstype=${spi_root_fs_type} ip=${ip_method}
spi_boot=echo Booting from spi ...; run spi_args; sf probe ${spi_bus_no}:0; sf read ${kloadaddr} ${spi_src_addr} ${spi_img_siz}; bootm ${kloadaddr}
spi_bus_no=0
spi_img_siz=0x380000
spi_root=/dev/mtdblock4 rw
spi_root_fs_type=jffs2
spi_src_addr=0x62000
static_ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off
stderr=serial
stdin=serial
stdout=serial

Environment size: 2663/8188 bytes

  • 0 in reply to Hafedh Haouala
    TI__Mastermind 25235 points

    Hi,

    And what are the contents of your SD card? I'm interested in the /boot partition. Is there a uEnv.txt file? If yes - please attach it.

    Best regards,
    Miroslav

  • 0 in reply to Miroslav Kiradzhiyski XID
    Intellectual 315 points

    Hi,

    my SD card contains :

    -  boot partition : MLO , u-boot.img, uImage, uEnv.txt

    - rootfs partition : rootfs

    - data partition : nothing

    and I'm using the same uEnv.txt found on http://processors.wiki.ti.com/index.php/TI-Android-ICS-4.0.3-DevKit-3.0.1_DevelopersGuide#.3D_Configure_Boot_Arguments

    and I made sure to do chmod a+x uEnv.txt as all the SD card example provided by TI are having this privilege.

    Thank you.

    Best Regards

  • 0 in reply to Hafedh Haouala
    TI__Mastermind 25235 points

    Hi,

    From your log posted a few posts above I see this output:

    Hit any key to stop autoboot:  0
    Booting from nand ...

    This print is part of the nand_boot command:

    nand_boot=echo Booting from nand ...; run nand_args; nandecc hw 2; nand read.i ${kloadaddr} ${nand_src_addr} ${nand_img_siz}; bootm ${kloadaddr}

    This means that some other command is invoking nand_boot. However, I can't manage to find which, neither in your U-Boot environment, nor in the three lines of the uEnv.txt file posted in the wiki:

    File: uEnv.txt 
    bootargs=console=ttyO0,115200n8 androidboot.console=ttyO0 mem=256M root=/dev/mmcblk0p2 rw rootfstype=ext4 rootwait init=/init ip=off
bootcmd=mmc rescan ; fatload mmc 0 81000000 uImage ; bootm 81000000
uenvcmd=boot

    Are you sure this is the only content in your uEnv.txt file? Perhaps there were some erroneous environment settings before you erased your NAND. Does this issue still occur?

    Please try executing these commands by hand while in U-Boot:
    mmc rescan
    fatload mmc 0 81000000 uImage
    bootm 81000000

    Best regards,
    Miroslav

  • 0 in reply to Miroslav Kiradzhiyski XID
    Intellectual 315 points

    Hi Miroslav,

    I'm sure that this is my uEnv.txt file.

    Miroslav Kiradzhiyski XID said:
    Please try executing these commands by hand while in U-Boot:
    mmc rescan
    fatload mmc 0 81000000 uImage
    bootm 81000000

    And yes, when I tried those commands, I was able to boot from the SD card.

    and, that's why I erased the NAND.

    Best Regards

  • 0 in reply to Hafedh Haouala
    TI__Mastermind 25235 points

    Hi,

    So I suppose this means that the issue does not occur any more?

    Best regards,
    Miroslav

  • 0 in reply to Miroslav Kiradzhiyski XID
    Intellectual 315 points

    Hi Miroslav,

    well, my NAND is empty, so I'm not facing the issue.

    however, I hope this will be the case when I will try to flash the NAND.

    Thank you for your guidance.

    Best Regards

  • 0 in reply to Hafedh Haouala
    TI__Mastermind 25235 points

    Hi,

    You should not face this problem once you flash your NAND.

    Take a look at this link about the NAND layout. This is where the ENV settings are stored:

    0x00260000-> ENV start

    0x0027FFFF-> ENV end

    When you erased the NAND, you erased the erroneous env settings. After you flash your NAND, please check your environment settings (print command). If you wish to alter them and then write them to NAND use the setenv and saveenv commands in U-Boot:

    saveenv - save environment variables to persistent storage
    setenv  - set environment variables

    Best regards,
    Miroslav