Using MTDPARTS to partition SPI flash on AM335x-EVM

Hi,

Please check this wiki: http://processors.wiki.ti.com/index.php/Linux_Core_U-Boot_User's_Guide#Using_SPI

Hi,

Thanks for the reply and the link.

When I issue the command mtdparts at u-boot prompt I get the following error.

mtdparts variable not set, see 'help mtdparts'
Device nor0 not found!

When I do the sf probe 0 I get the following ouput

SF: Detected W25Q64CV with page size 256 Bytes, erase size 4 KiB, total 8 MiB

Even I tried to change the include/configs/am335x-evm.h in u-boot source code

#define MTDIDS_DEFAULT "nor0=w25q64cv-flash.0"
#define MTDPARTS_DEFAULT "mtdparts=w25q64cv-flash.0:" \

from

#define MTDIDS_DEFAULT "nor0=m25p80-flash.0"
#define MTDPARTS_DEFAULT "mtdparts=m25p80-flash.0:"

Please let me know what part of code to be changed.

Hi,

When you run mtdparts you get:

  "mtdparts variable not set, see 'help mtdparts'

   Device nor1 not found!" 

But in am335x_evm.h, you are setting: 
  #define MTDIDS_DEFAULT "nor0=w25q64cv-flash.0"
  #define MTDPARTS_DEFAULT "mtdparts=w25q64cv-flash.0:" \ 

Can you please share the output of printenv on your platform? 

Do you use uEnv.txt file? What is its content? 

Best Regards, 

Yordan

Hi Yordan.

Thanks for reply. Please find the output of printenv environment.

U-Boot# mtdparts
mtdparts variable not set, see 'help mtdparts'
Device nor0 not found!

U-Boot# echo $mtdids
nor0=w25q64cv

U-Boot# printenv
arch=arm
baudrate=115200
board=am335x
board_name=A33515BB
board_rev=1.4A
boot_fdt=try
bootargs=console=ttyO0,115200n8 root=/dev/mmcblk0p2 ro rootfstype=ext4 rootwait
bootcmd=run spiboot;
bootcount=1
bootdelay=1
bootdir=/boot
bootenv=uEnv.txt
bootfile=zImage
bootm_size=0x10000000
bootpart=0:2
console=ttyO0,115200n8
cpu=armv7
eth1addr=00:18:31:f2:5d:58
ethact=cpsw
ethaddr=00:18:31:f2:5d:57
fdt_addr_r=0x88000000
fdtaddr=0x88000000
fdtfile=undefined
findfdt=if test $board_name = A335BONE; then setenv fdtfile am335x-bone.dtb; fi; if test $board_name = A335BNLT; then setenv fdtfile am3i
importbootenv=echo Importing environment from mmc ...; env import -t -r $loadaddr $filesize
kernel_addr_r=0x82000000
loadaddr=0x82000000
loadbootenv=load mmc ${mmcdev} ${loadaddr} ${bootenv}
loadfdt=load mmc ${bootpart} ${fdtaddr} ${bootdir}/${fdtfile}
loadimage=load mmc ${bootpart} ${loadaddr} ${bootdir}/${bootfile}
loadramdisk=load mmc ${mmcdev} ${rdaddr} ramdisk.gz
mmcargs=setenv bootargs console=${console} ${optargs} root=${mmcroot} rootfstype=${mmcrootfstype}
mmcboot=mmc dev ${mmcdev}; if mmc rescan; then echo SD/MMC found on device ${mmcdev};if run loadbootenv; then echo Loaded environment fr;
mmcdev=0
mmcloados=run mmcargs; if test ${boot_fdt} = yes || test ${boot_fdt} = try; then if run loadfdt; then bootz ${loadaddr} - ${fdtaddr}; el;
mmcroot=/dev/mmcblk0p2 ro
mmcrootfstype=ext4 rootwait
mtdids=nor0=w25q64cv
netargs=setenv bootargs console=${console} ${optargs} root=/dev/nfs nfsroot=${serverip}:${rootpath},${nfsopts} rw ip=dhcp
netboot=echo Booting from network ...; setenv autoload no; dhcp; tftp ${loadaddr} ${bootfile}; tftp ${fdtaddr} ${fdtfile}; run netargs; }
nfsopts=nolock
partitions=uuid_disk=${uuid_gpt_disk};name=rootfs,start=2MiB,size=-,uuid=${uuid_gpt_rootfs}
ramargs=setenv bootargs console=${console} ${optargs} root=${ramroot} rootfstype=${ramrootfstype}
ramboot=echo Booting from ramdisk ...; run ramargs; bootz ${loadaddr} ${rdaddr} ${fdtaddr}
ramdisk_addr_r=0x88080000
ramroot=/dev/ram0 rw
ramrootfstype=ext2
rdaddr=0x88080000
rootpath=/export/rootfs
soc=am33xx
spiargs=setenv bootargs console=${console} ${optargs} root=${mmcroot} rootfstype=${mmcrootfstype}
spiboot=echo Booting from spi ...; run spiargs; sf probe ${spibusno}:0; sf read ${loadaddr} ${spisrcaddr} ${spiimgsize}; bootz ${loadadd}
spibusno=0
spiimgsize=0x362000
spiroot=/dev/mtdblock4 rw
spirootfstype=jffs2
spisrcaddr=0xe0000
static_ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off
stderr=serial
stdin=serial
stdout=serial
usbnet_devaddr=00:18:31:f2:5d:58
vendor=ti
ver=U-Boot 2014.07-00107-gd28f2b9-dirty (May 11 2015 - 16:17:00)

Environment size: 3215/4091 bytes

Hi, 

Again do you use uEnv.txt? If yes, try deleting it & use the default environment variables in am335x_evm.h. 

Can you add the highlighted code bellow:

#define MTDIDS_DEFAULT "nor0=w25q64cv-flash.0"

#define MTDPARTS_DEFAULT "mtdparts=w25q64cv-flash.0:128k(SPL)," \

                                                         "512k(u-boot),128k(u-boot-env1)," \

                                                          "128k(u-boot-env2),3464k(kernel)," \

                                                          "-(rootfs)"

#elif defined(CONFIG_EMMC_BOOT)

#define CONFIG_ENV_IS_IN_MMC

#define CONFIG_SPL_ENV_SUPPORT

#define CONFIG_SYS_MMC_ENV_DEV 1

#define CONFIG_SYS_MMC_ENV_PART 2

#define CONFIG_ENV_OFFSET 0x0

#define CONFIG_ENV_OFFSET_REDUND (CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE)

#define CONFIG_SYS_REDUNDAND_ENVIRONMENT

#elif defined(CONFIG_NOR_BOOT)

#define CONFIG_ENV_IS_IN_FLASH

#define CONFIG_ENV_SECT_SIZE (128 << 10) /* 128 KiB */

#define CONFIG_ENV_OFFSET (512 << 10) /* 512 KiB */

#define CONFIG_ENV_OFFSET_REDUND (768 << 10) /* 768 KiB */

#define MTDIDS_DEFAULT "nor0=physmap-flash.0"

#define MTDPARTS_DEFAULT "mtdparts=physmap-flash.0:" \

                                                    "512k(u-boot)," \

                                                    "128k(u-boot-env1)," \

                                                    "128k(u-boot-env2)," \

                                                    "4m(kernel),-(rootfs)" 

In define CONFIG_EXTRA_ENV_SETTINGS  add: 

    "mtdids=" MTDIDS_DEFAULT "\0" \
    "mtdparts=" MTDPARTS_DEFAULT "\0" \ 

After that, compile your u-boot and try using: 

  u-boot# mtdparts default 

  u-boot# mtdparts 

Best Regards, 

Yordan

Hi Yordan,

Appreciate your time and Thanks for the steps. Though I have followed the steps issue is still the same and its say Device nor0 not found.

U-Boot# sf probe 0
SF: Detected W25Q64CV with page size 256 Bytes, erase size 4 KiB, total 8 MiB

U-Boot# mtdparts default
Device nor0 not found!
U-Boot# mtdparts
Device nor0 not found!

Regards,
Nagaraj