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Old 02-27-2013, 05:38 PM   #1
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Compiling U-Boot Problem
In an attempt to fix my completely wiped (serial, board ID and all) Paperwhite, I am trying to modify amazon's u-boot source to have the RAM initialisation hardcoded.

However, I am running into issues. While I can get u-boot to compile easily, whenever I try to actually load the u-boot.bin file, I get errors. With mfgtool, I get a "The handle is invalid., Error code:6"" error. When I try to use imx_usb_loader, it tells me:

Spoiler:
Code:
parse mx50_usb_work.conf
15a2:0052(KindleTouch) bConfigurationValue =1
Interface 0 claimed
report 1, wrote 16 bytes, err=0
report 3, read 4 bytes, err=0
read=56 78 78 56
u-boot.bin

unknown load address
report 1, wrote 16 bytes, err=0
report 3, read 4 bytes, err=0
read=56 78 78 56


Other, pre-compiled u-boots work perfectly. I assume I have made some sort of silly error that has caused a load address to be omitted in the header of the file.

Could anyone point me in the right direction?
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Old 02-28-2013, 06:24 AM   #2
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Do I understand it right that you are trying to add magic-key-less USB downloader mode support to u-boot ?
That would be a nice addition to the rescue pack...

I think you would increase the chance to get an advice by posting a diff between working and non-working code. Complete source code would be even more helpful.
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Old 02-28-2013, 06:24 PM   #3
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Not quite. When the kindle boots, it uses the board ID to work out what model it is and as such initialise the RAM in the appropriate manner for that board. When one totally wipes a kindle, it removes that information which prevents it from booting.

I want to bypass the detection routine and so remove the need for the board ID.

That being said, the modification you suggested is something I would gladly work on once I get my kindle running again!


However, my issue is that I can't get any u-boot.bin file that I have compiled on my system to boot, even one that was produced from amazon's unmodified source code.

I have tried on multiple machines on multiple os'es, so I assume I am missing something here.
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Old 02-28-2013, 06:37 PM   #4
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Quote:
Originally Posted by lporter View Post
Not quite. When the kindle boots, it uses the board ID to work out what model it is and as such initialise the RAM in the appropriate manner for that board. When one totally wipes a kindle, it removes that information which prevents it from booting.

I want to bypass the detection routine and so remove the need for the board ID.

That being said, the modification you suggested is something I would gladly work on once I get my kindle running again!


However, my issue is that I can't get any u-boot.bin file that I have compiled on my system to boot, even one that was produced from amazon's unmodified source code.

I have tried on multiple machines on multiple os'es, so I assume I am missing something here.
Have you tried eureka's u-boot?
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Old 02-28-2013, 06:55 PM   #5
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Old 02-28-2013, 07:41 PM   #6
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I've tried charging the battery for 24 hours - I don't think this is a battery issue. Bear in mind that u-boots that I have not compiled work perfectly.


EDIT: Just worked out that his u-boot is the one that auto-enters fastboot. Yeah, I have tried that. Bizarrely, no computer I have tried it with recognises a fastboot device or in fact any device at all when I use that.

I can't seem to find eureka's u-boot. Mind pointing me in the right direction? Also, while his u-boot might enable me to fix my kindle, I would still love to know if you have any ideas with regards to what on earth is wrong with my build environment!
Last edited by lporter; 02-28-2013 at 07:43 PM.
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Old 02-28-2013, 07:51 PM   #7
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Quote:
Originally Posted by lporter View Post
Bear in mind that u-boots that I have not compiled work perfectly.
Yep, sorry, diidn't notice that.

Quote:
Originally Posted by lporter View Post
EDIT: Just worked out that his u-boot is the one that auto-enters fastboot. Yeah, I have tried that. Bizarrely, no computer I have tried it with recognises a fastboot device or in fact any device at all when I use that.

I can't seem to find eureka's u-boot. Mind pointing me in the right direction?
You've just mentioned it, so you've certainly found it. But here is canonical source. It's also mentioned in top post of Simple Debricking thread.
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Old 02-28-2013, 10:06 PM   #8
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Are you using this recipe to build U-Boot?
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Old 03-01-2013, 10:50 AM   #9
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lporter: The original message in the <spoiler> part suggests that your binary is in a format that imx_usb_loader doesn't understand correctly. At least it looks as if it is an imx_usb_loader error, not an error reported by the unit.

I'm still scratching my head - probably I missed important bits of communication here in the board: How do you (or anyone else) bring a KPW into USB downloader mode? Or does that happen automatically because the flash/MMC is fully erased? It seems to be in USB downloader mode, the return codes reported by imx_usb_loader indicate this.
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Old 03-01-2013, 01:15 PM   #10
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Okay, so I got the compiler to work by including
Code:
TYPE=prod
to the make command. I didn't realise it needed this as it wasn't mentioned in the readme!

With a working u-boot, I made up a fake pcbsn so that the device would boot properly and set the idme variable accordingly.

Bizarrely, loading a stock u-boot.bin to my paperwhite then allowed me to use eureka's fastboot u-boot. I then tried to reflash the diags partition using the command:
Code:
>fastboot flash diags pw_5.2.0-mmcblk0p2.img
, which appeared to be successful on the fastboot end, but the serial terminal shows this error repeatedly:

Code:
ERROR : [fsl_arc_udc.c] udc_irq:1127: Packet sys err

Any idea what's going on here?
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Old 03-01-2013, 01:36 PM   #11
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If you have serial access and proper booting with stock U-Boot pre-flashed on device, then you can use fastboot mode included in pre-flashed U-Boot: don't use custom U-Boots, just reboot PW and execute bist fastboot in U-Boot console.
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Old 03-01-2013, 01:37 PM   #12
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Quote:
Originally Posted by lporter View Post
In an attempt to fix my completely wiped (serial, board ID and all) Paperwhite, I am trying to modify amazon's u-boot source to have the RAM initialisation hardcoded.

However, I am running into issues. While I can get u-boot to compile easily, whenever I try to actually load the u-boot.bin file, I get errors. With mfgtool, I get a "The handle is invalid., Error code:6"" error. When I try to use imx_usb_loader, it tells me:

Spoiler:
Code:
parse mx50_usb_work.conf
15a2:0052(KindleTouch) bConfigurationValue =1
Interface 0 claimed
report 1, wrote 16 bytes, err=0
report 3, read 4 bytes, err=0
read=56 78 78 56
u-boot.bin

unknown load address
report 1, wrote 16 bytes, err=0
report 3, read 4 bytes, err=0
read=56 78 78 56


Other, pre-compiled u-boots work perfectly. I assume I have made some sort of silly error that has caused a load address to be omitted in the header of the file.

Could anyone point me in the right direction?
I hardcoded my PCBSN and SERIAL with a custom u-boot, to debrick a K4 with corrupted idme vars. Somebody else here, with my guidance.

For compiling tips, check out some of the early links in the simple debricking sticky thread (with links to posts from yifanlu and eureka, I think) that suggests what flags to set when compiling u-boot.

EDIT: Ahh... Nevermind! I see after reading more posts in this thread that eureka already provided a link to such information. Sorry!
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Old 03-01-2013, 02:00 PM   #13
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Sorry, I wasn't clear. Nothing at all is flashed on to my device. Whenever I upload the stock u-boot to my kindle with mfgtool, it works, but crashes when I use anything bist-related for some reason.
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Old 03-01-2013, 02:14 PM   #14
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Quote:
Originally Posted by lporter View Post
Sorry, I wasn't clear. Nothing at all is flashed on to my device. Whenever I upload the stock u-boot to my kindle with mfgtool, it works, but crashes when I use anything bist-related for some reason.
Well, now I'm curious not only about how you've got to USB downloader mode on PW (as was pointed by hawhill), but also about how exactly did you wipe your device, so that pre-flashed U-Boot had been wiped too.
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Old 03-01-2013, 02:31 PM   #15
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...which still leaves the question that hawhill posted, and which I'm also very much interested in: how did you manage to get your Paperwhite into USB downloader mode in the first place? Did you find the holy grail that we have all desperately been looking for?
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