• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 98 subscribers
  • Views 1864 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Creating JFFS2 Nand File System

Komal Kumar Dhote
Prodigy 95 points

Hi All,

I was trying to create JFFS2 nand file system. Here is my steps

1. mkfs.jffs2 -lqn –e 128 -r target -o /tftpboot/rd-jffs2.bin on linux server
2. mw.b 0x81000000 0xFF 0x0C820000
3. tftp 0x81000000 <filesystem_image>
4. nand erase clean 0x006C0000 0x0C820000      

5. nand write 0x81000000 0x006C0000 <image_size> (I will get image_size from the tftp 0x81000000 <filesystem_image>) I will aling the size for 2Kb size also

6. Then I changed the bootargs to setenv bootargs 'console=ttyO2,115200n8 root=/dev/mtdblock3 rw rootfstype=jffs2 mem=100M earlyprintk ip=dhcp'

 

When booting happen I was getting the following errors

mtd->read(0x100 bytes from 0x0) returned ECC error

jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000000: 0x0185 instead

jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000004: 0x26e6 instead

jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000000c: 0x496d instead

jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000010: 0x8bc2 instead

jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000014: 0x6e62 instead

jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000018: 0x0044 instead

jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000001c: 0x0002 instead

jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000020: 0x00ed instead

jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000028: 0x496d instead

jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000038: 0x0185 instead

Further such events for this erase block will not be printed

mtd->read(0x1ff08 bytes from 0xf8) returned ECC error

mtd->read(0x1fbf4 bytes from 0x40c) returned ECC error

mtd->read(0x1f3fc bytes from 0xc04) returned ECC error

mtd->read(0x1ebfc bytes from 0x1404) returned ECC error

mtd->read(0x1e3fc bytes from 0x1c04) returned ECC error

mtd->read(0x1dbfc bytes from 0x2404) returned ECC error

mtd->read(0x1d3fc bytes from 0x2c04) returned ECC error

mtd->read(0x1cbfc bytes from 0x3404) returned ECC error

mtd->read(0x1c3fc bytes from 0x3c04) returned ECC error

mtd->read(0x1bbfc bytes from 0x4404) returned ECC error

mtd->read(0x1b3fc bytes from 0x4c04) returned ECC error

mtd->read(0x1abfc bytes from 0x5404) returned ECC error

mtd->read(0x1a3fc bytes from 0x5c04) returned ECC error

 

mtd->read(0x19bfc bytes from 0x6404) returned ECC error

mtd->read(0x193fc bytes from 0x6c04) returned ECC error

mtd->read(0x18bfc bytes from 0x7404) returned ECC error

 

Can somebody tell me what is wrong?

Regards,

Komal

  • 0
    Intellectual 300 points

    Hi,

    I usually add the p option when doing mkfs.jffs, as in:

    mkfs.jffs2 -lqnp –e 128 -r target -o /tftpboot/rd-jffs2.bin on linux server

    so that the image gets padded. That way, after transferring the image through tftp, when doing nand write, i can use the $filesize variable without having to manually align the size.

    Also, are you completely sure that the erase blocksize of your nand memory is 128KB?

    I hope this helps.