OK, thank you for all your comments, so it was finally successful with Nokia DKU-5 TTL . But now I have got another problem. Following the guide on https://forum.openwrt.org/viewtopic.php?id=33906, I uploaded the firmware, everything is fine, router boot first - but the second reboot get stuck always and I can again bring it to life only via serial and only first boot is fine.
Anyone get any idea what is wrong please ?
U-Boot 1.1.4 (Sep 3 2010 - 12:35:51)
AP99 (ar7241 - Virian) U-boot
DRAM:
sri
ar7240_ddr_initial_config(133): virian ddr1 init
#### TAP VALUE 1 = 0xf, 2 = 0x10 [0x0: 0x1f]
32 MB
id read 0x100000ff
sector count = 64
Flash: 4 MB
Using default environment
In: serial
Out: serial
Err: serial
Net: ag7240_enet_initialize...
No valid address in Flash. Using fixed address
No valid address in Flash. Using fixed address
Virian MDC CFG Value ==> 4
: cfg1 0xf cfg2 0x7014
eth0: 00:03:7f:09:0b:ad
eth0 up
Virian MDC CFG Value ==> 4
: cfg1 0xf cfg2 0x7214
eth1: 00:03:7f:09:0b:ad
ATHRS26: resetting s26
ATHRS26: s26 reset done
eth1 up
eth0, eth1
Autobooting in 1 seconds
## Booting image at 9f020000 ...
Uncompressing Kernel Image ... OK
Starting kernel ...
[ 0.000000] Linux version 3.18.8 (someone@debian) (gcc version 4.8.3 (OpenWrt/Linaro GCC 4.8-2014.04 r44597) ) #3 Thu Mar 5 13:21:11 CST 2015
[ 0.000000] bootconsole [early0] enabled
[ 0.000000] CPU0 revision is: 00019374 (MIPS 24Kc)
[ 0.000000] SoC: Atheros AR7241 rev 1
[ 0.000000] Determined physical RAM map:
[ 0.000000] memory: 02000000 @ 00000000 (usable)
[ 0.000000] Initrd not found or empty - disabling initrd
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x00000000-0x01ffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x00000000-0x01ffffff]
[ 0.000000] Initmem setup node 0 [mem 0x00000000-0x01ffffff]
[ 0.000000] Primary instruction cache 64kB, VIPT, 4-way, linesize 32 bytes.
[ 0.000000] Primary data cache 32kB, 4-way, VIPT, cache aliases, linesize 32 bytes
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 8128
[ 0.000000] Kernel command line: board=TL-WR841N-v7 console=ttyS0,115200 rootfstype=squashfs,jffs2 noinitrd
[ 0.000000] PID hash table entries: 128 (order: -3, 512 bytes)
[ 0.000000] Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.000000] Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.000000] Writing ErrCtl register=00000000
[ 0.000000] Readback ErrCtl register=00000000
[ 0.000000] Memory: 28456K/32768K available (2480K kernel code, 120K rwdata, 528K rodata, 252K init, 188K bss, 4312K reserved)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] NR_IRQS:51
[ 0.000000] Clocks: CPU:400.000MHz, DDR:400.000MHz, AHB:200.000MHz, Ref:5.000MHz
[ 0.000000] Calibrating delay loop... 265.42 BogoMIPS (lpj=1327104)
[ 0.080000] pid_max: default: 32768 minimum: 301
[ 0.080000] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.090000] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.100000] NET: Registered protocol family 16
[ 0.100000] MIPS: machine is TP-LINK TL-WR841N/ND v7
[ 0.550000] registering PCI controller with io_map_base unset
[ 0.560000] PCI host bridge to bus 0000:00
[ 0.570000] pci_bus 0000:00: root bus resource [mem 0x10000000-0x13ffffff]
[ 0.570000] pci_bus 0000:00: root bus resource [io 0x0000]
[ 0.580000] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
[ 0.580000] pci 0000:00:00.0: fixup device configuration
[ 0.590000] pci 0000:00:00.0: BAR 0: assigned [mem 0x10000000-0x1000ffff 64bit]
[ 0.590000] pci 0000:00:00.0: using irq 40 for pin 1
[ 0.600000] Switched to clocksource MIPS
[ 0.600000] NET: Registered protocol family 2
[ 0.610000] TCP established hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.610000] TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.620000] TCP: Hash tables configured (established 1024 bind 1024)
[ 0.630000] TCP: reno registered
[ 0.630000] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.640000] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.640000] NET: Registered protocol family 1
[ 0.650000] futex hash table entries: 256 (order: -1, 3072 bytes)
[ 0.660000] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.670000] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[ 0.680000] msgmni has been set to 55
[ 0.700000] io scheduler noop registered
[ 0.700000] io scheduler deadline registered (default)
[ 0.710000] Serial: 8250/16550 driver, 1 ports, IRQ sharing disabled
[ 0.710000] console [ttyS0] disabled
(Last edited by sharkys on 13 Mar 2015, 20:29)