Problem with finding flash device AM29F040B

[Dmytro Bablinyuk <dmytro.bablinyuk@tait.co.nz>]

I have a MPC866ADS out of the box board and I got linux running from 
ramdisk.
But I could not get flash (AM29F040B) working with 2.4.21 kernel.
I tried to specify phys map but I still have:

physmap flash device: 200000 at 2800000
CFI: Found no Physically mapped flash device at location zero
kmod: failed to exec /sbin/modprobe -s -k jedec_probe, errno = 2
kmod: failed to exec /sbin/modprobe -s -k map_rom, errno = 2

Could somebody please give me a clue about this.
Thank you in advance for any help.

Some details of my kernel config:

#
# Mapping drivers for chip access
#
CONFIG_MTD_PHYSMAP=y
CONFIG_MTD_PHYSMAP_START=2800000
CONFIG_MTD_PHYSMAP_LEN=200000
CONFIG_MTD_PHYSMAP_BUSWIDTH=2
# CONFIG_MTD_TQM8XXL is not set
# CONFIG_MTD_RPXLITE is not set
# CONFIG_MTD_MBX860 is not set
# CONFIG_MTD_DBOX2 is not set
# CONFIG_MTD_CFI_FLAGADM is not set
# CONFIG_MTD_REDWOOD is not set
# CONFIG_MTD_PCI is not set
# CONFIG_MTD_PCMCIA 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 is not set
# 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=y
CONFIG_MTD_AMDSTD=y

#
# Memory Technology Devices (MTD)
#
CONFIG_MTD=y
# CONFIG_MTD_DEBUG is not set
CONFIG_MTD_PARTITIONS=y
# CONFIG_MTD_CONCAT is not set
# CONFIG_MTD_REDBOOT_PARTS is not set
# CONFIG_MTD_CMDLINE_PARTS is not set
CONFIG_MTD_CHAR=y
CONFIG_MTD_BLOCK=y
# CONFIG_FTL is not set
# CONFIG_NFTL is not set