Kernel hangs when trying to probe AM29LV160DB flash device

Hi,
I am trying to get an AM29LV160DB flash device to work with the MTD
drivers under uClinux. The device is connected in a 16-bit bus fashion to a Motorola MC68VZ328.

The AM29LV160DB is supported by mtd/chips/jedec_probe.c

In my map file I have:
mymtd = do_map_probe("jedec_probe", &em1vz328_map);

The do_map_probe function calls get_mtd_chip_driver in mtd/mtd/chipreg.c and that is where things seem to hang. The get_mtd_chip_driver function never returns and hangs the kernel.

Here is a snippet of the boot messages:
---------------------------------------------------------
.
.
EMDG em1-vz328 mapping:size 200000 at 2000000
EMDG: MTD Debug: Calling the do_map_probe function...
EMDG: MTD Debug: Calling get_mtd_chip_driver function...

---------------------------------------------------------

I looked through the archives and I noticed someone else had a similar problem with this flash device under uClinux, but I could not find what the solution was.

If anyone has any ideas I would be grateful.

Thanks,
David

Kernel config:
#
# Memory Technology Devices (MTD)
#
CONFIG_MTD=y
CONFIG_MTD_DEBUG=y
CONFIG_MTD_DEBUG_VERBOSE=3
CONFIG_MTD_PARTITIONS=y
# CONFIG_MTD_CONCAT is not set
# CONFIG_MTD_REDBOOT_PARTS is not set
# CONFIG_MTD_CMDLINE_PARTS is not set

#
# User Modules And Translation Layers
#
CONFIG_MTD_CHAR=y
# CONFIG_MTD_BLOCK is not set
CONFIG_MTD_BLOCK_RO=y
# CONFIG_FTL is not set
# CONFIG_NFTL is not set

#
# RAM/ROM/Flash chip drivers
#
CONFIG_MTD_CFI=y
CONFIG_MTD_JEDECPROBE=y
CONFIG_MTD_GEN_PROBE=y
CONFIG_MTD_CFI_ADV_OPTIONS=y
CONFIG_MTD_CFI_NOSWAP=y
# CONFIG_MTD_CFI_BE_BYTE_SWAP is not set
# CONFIG_MTD_CFI_LE_BYTE_SWAP is not set
CONFIG_MTD_CFI_GEOMETRY=y
# CONFIG_MTD_CFI_B1 is not set
CONFIG_MTD_CFI_B2=y
# CONFIG_MTD_CFI_B4 is not set
CONFIG_MTD_CFI_I1=y
# CONFIG_MTD_CFI_I2 is not set
# CONFIG_MTD_CFI_I4 is not set
# CONFIG_MTD_CFI_INTELEXT is not set
# CONFIG_MTD_CFI_AMDSTD is not set
CONFIG_MTD_RAM=y
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_ABSENT is not set
# CONFIG_MTD_OBSOLETE_CHIPS is not set

David A. Jones                  Phone:  720-971-6381
Embedded Minds Design Group     Fax:    303-926-0208
www.EmbeddedMinds.com           Email:  david at EmbeddedMinds.com

You don't mention which kernel + patches you are using. Lately I have "fixed" some device probing which is in the CVS tree - although I don't think this is related to the problem you are seeing.

Thayne Harbaugh
Linux Networx

I am using a pre-packed uClinux development environment which includes Kernel 2.4.19-uc1. The mtd patches were already applied so I am trying to figure out exactly what version of mtd I have.

My understanding is that MTD is now included with the Linux kernel source right?

David

David A. Jones                  Phone:  720-971-6381
Embedded Minds Design Group     Fax:    303-926-0208
www.EmbeddedMinds.com           Email:  [email protected]