Kernel hangs when trying to probe AM29LV160DB flash device

Kernel hangs when trying to probe AM29LV160DB flash device

[David Jones]

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

Re: Kernel hangs when trying to probe AM29LV160DB flash device

[Thayne Harbaugh]

[-- Attachment #1: Type: text/plain, Size: 2569 bytes --]

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.

On Mon, 2003-03-31 at 15:08, David Jones wrote:
> 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
-- 
Thayne Harbaugh
Linux Networx

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 232 bytes --]

Re: Kernel hangs when trying to probe AM29LV160DB flash device

[David Jones]

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

Thayne Harbaugh wrote:
> 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.
> 

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