flashing from linux

[Sharad P. Katti]

Hi All,

I'm working on sigma designs' arm based em8622 board with 2.4.22-2
kernel with uclinux patch applied, in which i have 4MB nor flash which
is amd/fujitsu complaint.

Now, when i try to update the flash with a new initrd image from the
linux, it is allowing me to erase and write only 64Kbytes
where as in the mtdpartitions.h, my Rootfs is having the size of 3840 bytes.

dmesg shows me the partitions created in the flash as follows.

Probing EM86XX Flash Memory
 Amd/Fujitsu Extended Query Table v1.1 at 0x0040
number of CFI chips: 1
Using word write method
cfi_cmdset_0002: Disabling fast programming due to code brokenness.
mtd: Giving out device 0 to EM86XX mapped flash
Creating 4 MTD partitions on "EM86XX mapped flash":
0x00030000-0x003c0000 : "RootFS"
mtd: Giving out device 1 to RootFS
0x003f0000-0x00400000 : "User"
mtd: Giving out device 2 to User
0x00000000-0x00010000 : "BootROM1"
mtd: Giving out device 3 to BootROM1
0x00010000-0x00030000 : "BootROM2"
mtd: Giving out device 4 to BootROM2

from the flash_info utility, i'm getting the partition informations as
em86xx#./flash_info /dev/mtd/1
MTD_open
MTD_ioctl
Device /MTD_close
dev/mtd/1 has 0 erase regions

and the mtd_debug o/p shows me the erasesize as,

em86xx#./mtd_debug info /dev/mtd/1
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NORFLASH
mtd.size = 3932160 (3M)
mtd.erasesize = 65536 (64K)
mtd.oobblock = 0
mtd.oobsize = 0
mtd.ecctype = MTD_ECC_NONE
regions = 0


These are the steps i followed to write the new image to the flash.
em86xx#flashcp -v /new/Image/romfs.bin /dev/mtd/1
after writing the first 64K of the /dev/mtd/1, i'm getting the warning
message as
"File does not seem to match flash data. First mismatch at 0x00000000
- 0x00002800"

I have set the folowing in my kernel configurations wrt mtd drivers.
#
# Memory Technology Devices (MTD)
#
CONFIG_MTD=y
CONFIG_MTD_DEBUG=y
CONFIG_MTD_DEBUG_VERBOSE=2
CONFIG_MTD_PARTITIONS=y
CONFIG_MTD_CONCAT=y
# CONFIG_MTD_REDBOOT_PARTS is not set
# CONFIG_MTD_CMDLINE_PARTS is not set
# CONFIG_MTD_AFS_PARTS is not set
CONFIG_MTD_CHAR=y
CONFIG_MTD_BLOCK=y
# CONFIG_FTL is not set
# CONFIG_NFTL is not set
# CONFIG_INFTL is not set

#
# RAM/ROM/Flash chip drivers
#
CONFIG_MTD_CFI=y
# CONFIG_MTD_JEDECPROBE is not set
CONFIG_MTD_GEN_PROBE=y
# CONFIG_MTD_CFI_ADV_OPTIONS is not set
# CONFIG_MTD_CFI_INTELEXT is not set
CONFIG_MTD_CFI_AMDSTD=y
# CONFIG_MTD_CFI_STAA is not set
# CONFIG_MTD_RAM is not set
# CONFIG_MTD_ROM is not set# CONFIG_MTD_ABSENT is not set
# CONFIG_MTD_OBSOLETE_CHIPS is not set
# CONFIG_MTD_AMDSTD is not set
# CONFIG_MTD_SHARP is not set
# CONFIG_MTD_JEDEC is not set

#
# Mapping drivers for chip access
#
CONFIG_MTD_EM86XX=y
# CONFIG_MTD_EM86XX_FLASH2 is not set
# CONFIG_MTD_EM86XX_16BIT_BUSWIDTH is not set
# CONFIG_MTD_PHYSMAP is not set
# CONFIG_MTD_DRAGONIX is not set
# CONFIG_MTD_NETtel is not set
# CONFIG_MTD_SNAPGEODE is not set
# CONFIG_MTD_NETteluC is not set
# CONFIG_MTD_MBVANILLA is not set
# CONFIG_MTD_KeyTechnology is not set
# CONFIG_MTD_NORA is not set
# CONFIG_MTD_ARM_INTEGRATOR is not set
# CONFIG_MTD_CDB89712 is not set

can anyone shows me a pointer about what could be wrong with the
configurations.?

regards,

--
Sharad P.Katti

"GOD is real, unless declared as an int"