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[DEV][Bootloader] u-boot / omap4boot for P920/P720/P940 and its variant

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cross post from http://forum.xda-developers.com/show...6&postcount=43

I have only KU5400(the same hardware spec of SU540)
but I can port the omap4boot / u-boot for SU760/SU870 with others help.

LG Prada 3.0 is very similar with the P920/SU760 and P720/P725/SU870
So I cross post it in this dev section.

Now SU540/SU760/SU870 are unbrickable with this omap4boot + u-boot,
and with the new ported u-boot you can even change your kernel too!


Quote:
Originally Posted by milaq

thanks for the headsup. any of such is much appreciated (as many stuff for the prada is in korean, chinese, etc.)

these are the opensource gpl components for the ku5400 (which essentially is the p940 for the eastern market). you can get the zips for the p940 here http://www.lg.com/global/support/ope...delCode=LGP940

this includes the kernel sourcecode which allowed me to build e.g. the cifs. module.
unfortunately we are still st(r)uck with an encrypted bootloader. therefore it is not possible to boot any custom kernel atm.

Now it is possible

from http://forum.xda-developers.com/show...3&postcount=23

Quote:
Originally Posted by wkpark

Quote:
Originally Posted by wkpark

Currently Im working on "Unbrickable Optimus 3D"

LG accidently leaked the RSA keys of the P920/SU760 and the signing tool
in the GB source.
http://www.lg.com/global/support/ope...elCode=LGSU760
(I guess the leaked RSA keys could be the reference keys of the TI signing tool)

so I can signing it's x-loader / u-boot etc.
the leaked RSA keys are used by Prada3.0(SU540 model), P920, SU760, SU870(Korean version of Optimus 3D Cube known as P720)

and the omap4boot port of the Prada3.0 working nicely with the new u-boot based on the SU760/SU870 u-boot source.
http://cafe.naver.com/androidhacker/406 (written in Korean)

Finally, the omap4boot port of SU760/SU870 + u-boot port of SU760/SU870 works nicely!!

http://cafe.naver.com/androidhacker/406 (written in Korean)

Instruction
Please see also
http://forum.xda-developers.com/show....php?t=1244490
(this method does not recover from broken bootloader at all)

1. Install OMAP4430 USB driver

If you plug your Phone on PC without battery, OMAP4430 device appeared for seconds and then disappeared.

2. start start_fastboot.bat using the omap4boot + u-boot (win32 port of omap4boot included)

1. Turn off your Phone, pull out battery.
2. start "start_fastboot.bat" (it will waiting until phone connected)
3. connect USB cable, the usbboot will start
4. insert battery while the usbboot is waiting
5. unplug USB cable the LG logo will appeard and the fastboot started.

If you have some time please test it with your phone.

Im not sure It is working for P940

just test it and report about it. it is almost there to unlock change your bootloader(lk bootloader) to the new u-boot bootloader
to circumvent locked booloader.

original post from http://cafe.naver.com/androidhacker/406 (in Korean)
you can get the latest omap4boot + signed u-boot from.

ChangeLog
●P940 signed u-boot added (11/12) muxtable dumped by milaq
●P920 signed u-boot added (11/12) muxtable dumped by iodak (v1.17a or v1.17b)
●P920: replace mux table with new one (11/28) dumped by kidkoala_uk (v1.18)
- script rewritten
- fixed p920-u-boot_fastboot.bin (v1.18a)

●P920/SU760: revert charging mode support to fix 0% battery (v1.21)
- SU870/SU540/P720 fixup to support charging mode and reboot/poweroff
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3rd November 2012, 11:42 AM |#2  
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I have p725. Will this work?
And kernel means zimage or boot.img?

Sent from my LG-P725 using xda premium
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3rd November 2012, 11:50 AM |#3  
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p725 is pretty much the same as p720 so yea it should boot into recovery/fastboot. I'm presuming kernel is kernel.img from a dump or some sort.
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3rd November 2012, 06:09 PM |#4  
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I can boot into fastboot, but not get u-boot binary to work and boot unsigned boot/recovery.

got P920 with SU760 ics port edition here
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3rd November 2012, 10:01 PM |#5  
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P940 confirmed working
http://forum.xda-developers.com/show...8&postcount=46

booting unsigned recovery/boot images not yet tested
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3rd November 2012, 10:06 PM |#6  
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Question
What really does that give us?
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3rd November 2012, 11:00 PM |#7  
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Thumbs up Thank You
Nice to see you are still working with the omap4boot project wkpark.
Believe me your tool has helped me in so many cases (apart from porting ICS) that it really is priceless.

Once again THANK YOU for your hard work on this and most of all because i am not afraid to brick my phone anymore.
It's your hard work that made me come back to the O3D party and try new stuff.
You are great.
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3rd November 2012, 11:39 PM |#8  
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where is his recorgnized DEv/Contributer imo he Deserves it MOds?
4th November 2012, 12:03 AM |#9  
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Quote:
Originally Posted by defcomg

where is his recorgnized DEv/Contributer imo he Deserves it MOds?

Exactly as above.
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5th November 2012, 05:56 PM |#10  
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Hi, great you are.
Btw, I wonder how can get signed file, example: p920-u-boot_fastboot-signed.bin while p920-u-boot_fastboot.bin maybe can get from LG opensources files.
And after extract files from KDZ, which file is uboot, x-loader, gpt.....

http://forum.xda-developers.com/atta...0&d=1351868951
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6th November 2012, 06:57 AM |#11  
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Quote:
Originally Posted by Thanh_GSM

Hi, great you are.
Btw, I wonder how can get signed file, example: p920-u-boot_fastboot-signed.bin while p920-u-boot_fastboot.bin maybe can get from LG opensources files.
And after extract files from KDZ, which file is uboot, x-loader, gpt.....

http://forum.xda-developers.com/atta...0&d=1351868951

Please read the original post first.
LG leaked their RSA signing keys and the signing tool
Thats why it can be born

Sent from my LG-KU5400 using xda app-developers app
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