Linksys EA7500 V1 UBOOT is gone

Installing and Using OpenWrt
1

Hello , i was trying to install openwrt but i think deleted uboot, because i dont see anything from the serial console anymore..
This is the last thing that i have done and these are the last logs from the serial port... after the reset now nothing happens , nothing sent from the serial port...

U-Boot .07 [Standard IPQ806X.LN,r40331] (Nov 05 2015 - 14:44:22)

CBT U-Boot ver: 1.1.4

smem ram ptable found: ver: 0 len: 5
DRAM: 235 MiB
NAND: SF: Unsupported manufacturer 00
ipq_spi: SPI Flash not found (bus/cs/speed/mode) = (0/0/48000000/0)
128 MiB
MMC:
PCI0 Link Intialized
PCI1 Link Intialized
In: serial
Out: serial
Err: serial
cdp: get part failed for 0:HLOS
Net: MAC1 addr:0:3:7f:ba:db:1
athrs17_reg_init: complete
athrs17_vlan_config ...done
S17c init done
MAC2 addr:0:3:7f:ba:db:2
eth0
Warning: eth0 MAC addresses don't match:
Address in SROM is 00:03:7f:ba:db:01
Address in environment is 00:06:3b:01:41:00
, eth1

Updating boot_count ... done

Hit any key to stop autoboot: 0
Write Reg: 0x00000660: Oldval = 0x00140002 Newval = 0x0014007e
Write Reg: 0x0000066c: Oldval = 0x00140001 Newval = 0x0014007d
Write Reg: 0x00000678: Oldval = 0x00140078 Newval = 0x0014007b
Write Reg: 0x00000684: Oldval = 0x00140074 Newval = 0x00140077
Write Reg: 0x00000690: Oldval = 0x0014006c Newval = 0x0014006f
Write Reg: 0x0000069c: Oldval = 0x0014005c Newval = 0x0014005f
Write Reg: 0x000006a8: Oldval = 0x0014003c Newval = 0x0014003f
Write Reg: 0x00000420: Oldval = 0x00020001 Newval = 0x00010001
Write Reg: 0x00000428: Oldval = 0x00020001 Newval = 0x00010001
Write Reg: 0x00000430: Oldval = 0x00010001 Newval = 0x00010001
Write Reg: 0x00000438: Oldval = 0x00010001 Newval = 0x00010001
Write Reg: 0x00000440: Oldval = 0x00010001 Newval = 0x00010001
Write Reg: 0x00000448: Oldval = 0x00010001 Newval = 0x00010001
Write Reg: 0x00000450: Oldval = 0x00010001 Newval = 0x00010001
(IPQ) # <INTERRUPT>
(IPQ) # <INTERRUPT>
(IPQ) # <INTERRUPT>
(IPQ) # setenv ipaddr 192.168.1.1
(IPQ) # setenv serverip 192.168.1.254
(IPQ) # tftpboot 0x80000000 factory.bin
Unknown command 'tftpboot' - try 'help'
(IPQ) # <INTERRUPT>
(IPQ) # tftp 0x80000000 ${serverip}:factory.bin
Mac1 unit failed
Using eth1 device
TFTP from server 192.168.1.254; our IP address is 192.168.1.1
Filename 'factory.bin'.
Load address: 0x80000000
Loading: #################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
##########################################################
done
Bytes transferred = 9437184 (900000 hex)
(IPQ) # md5sum 0x80000000 ${filesize}
Unknown command 'md5sum' - try 'help'
(IPQ) # <INTERRUPT>
(IPQ) # nand erase 0x0 0x900000

NAND erase: device 0 offset 0x0, size 0x900000
Erasing at 0x8e0000 -- 100% complete.
OK
(IPQ) # nand write 0x80000000 0x0 ${filesize}

NAND write: device 0 offset 0x0, size 0x900000
9437184 bytes written: OK
(IPQ) # reset
resetting ...

Resetting with watch dog!

I jave jlink or ulink jtag devices, soldering station but i dont have any idea how to recover this ? can re load uboot from jtag ? thank you for any help.

2

Just to be clear, is there a Wiki or instruction that told you to do this?

If so, provide a link so we can edit it.

I cannot find this information anywhere in the official installation instructions nor on the TFTP instructions.

3

Hi ,
i did a mistake , so these info was no where. i took some notes to my txt file ,most probably for some other system , and i copy and paste these commands blindly.... i dig the forum , i saw some one was soldered the IO0-8 NAND pins back of the pcb, so most probably i will follow that path. i think i still have ART section for calibration data ...

4

can you give this a go?