Solved - Unknown or NO Flash Chip Detected & no results even with correct /fc

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Solved - Unknown or NO Flash Chip Detected & no results even with correct /fc

david.lynch

JTAGers,
Trying to flash without success another model of Linksys WRT54GL V1.1, with flash Samsung K8D3216UBC, using TIAO USB Multi-Protocol Adapter.
Here is the verbose output:

==============================================
zJTAG EJTAG Debrick Utility v1.0
==============================================
Set I/O speed to 7500 KHz
USB TAP device has been initialized. Please confirm VREF signal connected!
Press any key to continue... ONCE target board is powered on!
Probing bus ... Done
Detected IR chain Length is 8
CPU assumed running under LITTLE endian
CPU Chip ID: 00000101001101010010000101111111 (0535217F)
*** Found a Broadcom manufactured BCM5352 REV 01 CPU ***
- EJTAG IMPCODE ....... : 00000000100000000000100100000100 (00800904)
- EJTAG Version ....... : 1 or 2.0
- EJTAG DMA Support ... : Yes
- EJTAG Implementation flags: R4k MIPS32
Issuing Processor / Peripheral Reset ... Done
Enabling Memory Writes ... Done
Halting Processor ... <Processor did NOT enter Debug Mode!> ... Done
Clearing Watchdog ... Done
Loading CPU Configuration Code ... Skipped
Probing Flash at Address: 0x1FC00000 ...
Read raw Chip ID (MfrIDevID = 0000 : 0000)
Detected Chip ID (VenIDevID = 0000 : 0000)
Read Array Starting from offset
Array = 0x0000
Array = 0x0000
Array = 0x0000
Read Array Starting from offset
Array = 0x0000
Array = 0x0000
Array = 0x0000
Read Array Starting from offset
Array = 0x0000
Array = 0x0000
Array = 0x0000
Read Array Starting from offset
Array = 0x0000
Array = 0x0000
Array = 0x0000
*** Unknown or NO Flash Chip Detected ***
*** REQUESTED OPERATION IS COMPLETE ***

I'm getting no results even using /fc:034 (from Supported Flash Chips).
Output when I try to erase, using zjtag.exe -erase:wholeflash /L1:3 /fc:34:

- EJTAG IMPCODE ....... : 00000000100000000000100100000100 (00800904)
- EJTAG Version ....... : 1 or 2.0
- EJTAG DMA Support ... : Yes
- EJTAG Implementation flags: R4k MIPS32
Issuing Processor / Peripheral Reset ... Done
Enabling Memory Writes ... Done
Halting Processor ... <Processor did NOT enter Debug Mode!> ... Done
Clearing Watchdog ... Done
Loading CPU Configuration Code ... Skipped
*** Manually Selected a K8D3216UBC 2Mx16 BotB (4MB) from Samsung
- Flash Chip Window Start .... : 1FC00000
- Flash Chip Window Length ... : 00200000
- Selected Area Start ........ : 1FC00000
- Selected Area Length ....... : 00200000
*** You Selected to Erase the WHOLEFLASH.BIN ***
=========================
Erasing Routine Started
=========================
Total Blocks to Erase: 39
Erasing block: 1 (addr = 1FC00000)...

(...and it hangs on this)
With /bypass it accepts to flash CFE, but when tested it still did not work (all lan lights on). The exact same CFE recovered another identical model (except for the flash Samsung, it was a Intel).
Any help is greatly appreciated!

[deleted]

flash chip may be damaged, if so you will need to replace flash chip.
please also try older zjtag version 0.4 to make sure that we didn't break anything in the upgrade.

david.lynch

It is now identifying correctly the flash, with no explanation at all

Succesfully flashed with latest version, after hours of many attempts...

If I remember correctly, one thing that I've done before I could get Debug Access and Flash identification was:
zjtag.exe -probeonly /erasechip /L1:3
But I'm not sure of that, since I've made a lot of attempts.

[deleted]

Thank you for the feedback. I'm closing this topic as your issue is solved.