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[NewITMalcolm]

These instructions should get you from a Bricked Sheeva/Dream/Guru/OpenRD to getting uboot running in Ram ready to restore your system from USB/TFTP.

I am assuming you are using a Linux PC to run Openocd.

Firstly install the packages required.

Code: [Select]

sudo apt-get install openocd telnet screen
Connect & Power up your device with the mini usb cable and jtag(Dreamplug & Guruplug).

Open a terminal session and connect to the plug console.

Code: [Select]

screen /dev/ttyUSB0 115200
Open a 2nd terminal session.

Select one of these for your device.

Code: [Select]

Marvell u-boot
wget http://www.downloadsnewit.co.uk/u-boot/recovery/sheevaplug/u-boot.elf
wget http://www.downloadsnewit.co.uk/u-boot/recovery/dreamplug/u-boot.elf

DENX u-boot
wget http://www.downloadsnewit.co.uk/u-boot/recovery/sheevaplug/denx/u-boot.elf
wget http://www.downloadsnewit.co.uk/u-boot/recovery/dreamplug/denx/u-boot.elf
wget http://www.downloadsnewit.co.uk/u-boot/recovery/guruplug/denx/u-boot.elf
wget http://www.downloadsnewit.co.uk/u-boot/recovery/openrd/denx/u-boot.elf

For Sheevaplug/ Dreamplug / Guruplug

Code: [Select]

sudo openocd -f /usr/share/openocd/scripts/board/sheevaplug.cfg -s /usr/share/openocd/scripts
For OpenRD

Code: [Select]

sudo openocd -f /usr/share/openocd/scripts/board/openrd.cfg -s /usr/share/openocd/scripts
You should see output similar to this.

Open On-Chip Debugger 0.4.0 (2010-10-08-15:52)
Licensed under GNU GPL v2
For bug reports, read
   http://openocd.berlios.de/doc/doxygen/bugs.html
2000 kHz
trst_and_srst separate srst_gates_jtag trst_push_pull srst_open_drain
jtag_nsrst_delay: 200
jtag_ntrst_delay: 200
dcc downloads are enabled
Warn : use 'feroceon.cpu' as target identifier, not '0'
Info : clock speed 2000 kHz
Info : JTAG tap: feroceon.cpu tap/device found: 0x20a023d3 (mfg: 0x1e9, part: 0x0a02, ver: 0x2)
Info : Embedded ICE version 0
Info : feroceon.cpu: hardware has 1 breakpoint/watchpoint unit

If you are using a jtag and getting errors at this point replug or even swap jtag cables and retry.

Next open a 3rd terminal session.

Code: [Select]

telnet localhost 4444
Output should look like this.

$ telnet localhost 4444
Trying ::1...
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Open On-Chip Debugger
>

For the Sheevaplug / Dreamplug / Guruplug

Code: [Select]

reset;sheevaplug_init;load_image u-boot.elf;resume 0x00600000
For the OpenRD

Code: [Select]

reset;openrd_init;load_image u-boot.elf;resume 0x00600000
Now you should see Uboot starting to run in the 1st terminal session and you are ready to start restoring your plug.

[PacoLM]

Just fantastic, good job! I would like to see the same level of support for each device I own...

[Splatter]

Sorry to revive a post over a year old but I just made an account to post this.

First off thanks for this, I was able to get my plug back working temporarily using this guide it was great.

Only problem is is doesn't persist after a reboot. Blue light goes back off and the sheevaplug goes back to brick.  Is there another command I need to give the onchip debugger after the "reset;sheevaplug_init;load_image u-boot.elf;resume 0x00600000" command to make this persist?

I was using a Debian livecd so I only hade a command line & didn't use the screen command. Just hit the OpenOcd line with a & sign and then used telnet to reset the box to the new elf file.

Thanks!!

[zurctrebla]

Sorry to revive a post over a year old but I just made an account to post this.

I make all, but I don`t see nothing in 1st terminal, where is a error?

I was using a Ubuntu install on my notebook.

after the last step, how make?

Thanks!!

ps: sorry my poor English

[jmeeks4u]

Hello I'm new to the plug computing, but have I had a crash course over the last two weeks! Literally. My dreamplug is bricked. I've seem to have successfully dd images to my micro sd card,. but it won't boot. I can get all the way through the above mentioned process, but where do we go from there? I've tried to fatload, without success.

[axel]

Hi,

Sorry to revive a post over a year old but I just made an account to post this.
I make all, but I don`t see nothing in 1st terminal, where is a error?

I'm stuck here as well. I tried the process and nothing on the serial port.

The output of openocd is:

Code: [Select]

JTAG tap: feroceon.cpu tap/device found: 0x20a023d3 (mfg: 0x1e9, part: 0x0a02, ver: 0x2)
target state: halted
target halted in ARM state due to debug-request, current mode: Supervisor
cpsr: 0x000000d3 pc: 0xffff0000
MMU: disabled, D-Cache: disabled, I-Cache: disabled
149712 bytes written at address 0x00600000
downloaded 149712 bytes in 1.081951s (135.129 KiB/s)


[EmJayArr]

Sorry to revive a post over a year old but I just made an account to post this.

First off thanks for this, I was able to get my plug back working temporarily using this guide it was great.

Only problem is is doesn't persist after a reboot. Blue light goes back off and the sheevaplug goes back to brick.  Is there another command I need to give the onchip debugger after the "reset;sheevaplug_init;load_image u-boot.elf;resume 0x00600000" command to make this persist?

I was using a Debian livecd so I only hade a command line & didn't use the screen command. Just hit the OpenOcd line with a & sign and then used telnet to reset the box to the new elf file.

Thanks!!

The elf file is basically a "live" u-boot that you temporarily push to your device. I hope you've fixed it by now, but here's what I did on my Dreamplug after the last step (inserting the command into telnet) for anyone else wondering:

In terminal #1, stop the boot of the pushed u-boot.elf by pressing any key to get to the Marvell>> prompt.
Put a u-boot image named u-boot.kwb (such as the one from http://code.google.com/p/dreamplug/downloads/detail?name=dream_burn_spi.tar.bz2 in the testenv folder) on a thumb drive & plug in to Dreamplug. (Actually, you should probably do this first, before all of the first steps in the OP.)

At the Marvell>> prompt:

Code: [Select]

usb start
fatload usb 1:1 0x6400000 u-boot.kwb (you can use 'usb storage' to find the correct usb device & partition, 1:1 was correct for me)
sf probe 0
sf erase 0x0 0x100000
sf write 0x6400000 0 0xd0000
reset

Technically, 0xd0000 on the 'sf write' line should be the file size of u-boot.kwb in hex, eg: sf write 0x6400000 0x0 0x2FDEC, but it doesn't seem to matter. You'll also have to reset your u-boot environment variables using setenv (particularly ethaddr and eth1addr, at least, in my case).
You also should be able to push u-boot.kwb using JTAG or TFTP, but I hadn't been able to get that to work.

References (other than this thread):
http://www.newit.co.uk/forum/index.php/topic,2647.0.html
http://wiki.debian.org/FreedomBox/DreamPlug/Firmware

[AdmiralVS]

Firstly: thanks for these great instructions. They made my day. Or night, actually.

I ran into the problem that version 0.8 of openocd, at least the Debian Version 0.8.0-1, don't have support for the transport "ft2232" anymore.
The error message is "Error: The specified debug interface was not found (ft2232)"
I just filed a corresponding bug report: "Bug#751372: openocd: connecting to SheevaPlug broken in 0.8".
What worked for me was downgrading openocd to 0.7 from the Debian repository.
I'll post a reply here if / when openocd properly supports the Sheevaplug again.

Thanks again!

[tomg1]

Hi,

I'm tying to unbrick my Sheevaplug plug.

When I try opened get this :-


[email protected]:~ $ sudo openocd -f /usr/share/openocd/scripts/board/sheevaplug.cfg -s /usr/share/openocd/scripts
Open On-Chip Debugger 0.9.0 (2018-01-22-06:14)
Licensed under GNU GPL v2
For bug reports, read
   http://openocd.org/doc/doxygen/bugs.html
Info : auto-selecting first available session transport "jtag". To override use 'transport select <transport>'.
trst_and_srst separate srst_gates_jtag trst_push_pull srst_open_drain connect_deassert_srst
adapter_nsrst_delay: 200
jtag_ntrst_delay: 200
adapter speed: 2000 kHz
dcc downloads are enabled
Warn : use 'feroceon.cpu' as target identifier, not '0'
sheevaplug_load_uboot
Info : clock speed 2000 kHz

and then it just hangs I don't get

Info : JTAG tap: feroceon.cpu tap/device found: 0x20a023d3 (mfg: 0x1e9, part: 0x0a02, ver: 0x2)
Info : Embedded ICE version 0
Info : feroceon.cpu: hardware has 1 breakpoint/watchpoint unit

I've tried several different cables any ideas else what I might try?