MTD Flash-unlock with Nymonix Strata Flash (P30) doesn't work

[Roggli, Lukas]

Hi all

I'm a newbie to the embedded linux world and I've been trying for days
to access the flash chip (Nymonix 64MB Flash, Intel-Strata based) on my
hardware. I've been reading myself through the mailinglist and tried all
the advices - but still not successful.
I'm using Kernel 2.6.28. 

flinfo print-out:
Bank #1: CFI conformant FLASH (16 x 16) Size: 64 MB in 512 Sectors
Intel Extended command set, Manufacturer ID: 0x89, Device ID: 0x99

What I am doing:

First, I'm creating a new ubi-Partition:

ubimkvol /dev/ubi0 -S 5 -N flash_test_area --> this generates a new
mtd-Device mtd5

Because the Nymonix-Flash powers up with locked sectors, I need to
unlock it first:

strace -o /tmp/flash.log flash_unlock /dev/mtd5  

flash.log print out:

execve("/usr/sbin/flash_unlock", ["flash_unlock", "/dev/mtd5"], [/* 17
vars */]) = 0
brk(0)                                  = 0x10041000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x4801d000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY)      = -1 ENOENT (No such file or
directory)
open("/lib/tls/ppc603/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/lib/tls/ppc603", 0xbfb13f48)   = -1 ENOENT (No such file or
directory)
open("/lib/tls/libc.so.6", O_RDONLY)    = -1 ENOENT (No such file or
directory)
stat64("/lib/tls", 0xbfb13f48)          = -1 ENOENT (No such file or
directory)
open("/lib/ppc603/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/lib/ppc603", 0xbfb13f48)       = -1 ENOENT (No such file or
directory)
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\1\2\1\0\0\0\0\0\0\0\0\0\0\3\0\24\0\0\0\1\0\1\346"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0777, st_size=1381924, ...}) = 0
mmap(0xfe62000, 1626832, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE,
3, 0) = 0xfe62000
mprotect(0xffa8000, 262144, PROT_NONE)  = 0
mmap(0xffe8000, 20480, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x146000) = 0xffe8000
mmap(0xffed000, 8912, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffed000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x4801e000
mprotect(0xffe8000, 8192, PROT_READ)    = 0
mprotect(0x4805c000, 4096, PROT_READ)   = 0
open("/dev/mtd5", O_RDWR)               = 3
ioctl(3, 0x40204d01, 0xbfb148c0)        = 0
ioctl(3, 0x80084d06, 0xbfb148b8)        = -1 EOPNOTSUPP (Operation not
supported)
write(2, "Could not unlock MTD device: /de"..., 39) = 39
close(3)                                = 0
exit_group(1)                           = ?

Why does the mtd-layer not support flash unlocking? Do I need to set a
specific flag in the kernel configuration (or even in my definitions in
the flattened device tree)?

Flash unlocking/programming/erasing works fine with u-boot - so there's
probably no hardware issue.

Thanks in advance for all advices.

Luke