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Old 04-30-2022, 11:38 AM   #1
NonaSuomy
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InkBox for Sony E-Readers Porting Attempt

Hi All,

We’re trying to port InkBox https://github.com/Kobo-InkBox/inkbox to other devices like the Sony E-Readers if you have any information on Sony’s hardware to get a Linux kernel up and running please contact me in this Discord Channel

https://discord.gg/SwGSrpYC

https://discord.com/channels/8092057...54812567130152

So far we got the Kernel compiling from Sony sources

https://oss.sony.net/Products/Linux/..._20140702.html

The PRS-T1 is similar to the Kobo Touch N905A/B (Not C) and Nook Simple.
Processor is an NXP MX508 which InkBox is already ported to.

The current issue is the watchdog timer resets the device during U-Boot and our uImage is too large.

If anyone knows how to prevent this let me know. The size issue stems from building busybox into the uImage (3.2MB) without busybox it’s normally 2.2MB.

I would like to thank @JPA for their UART information and SD image as this helped me get my corrupted eMMC out of the equation and things booting from the SDCard.

I’ve mind dumped everything so far that we have tried in the discord channel if anyone wants some haphazard fumbling reading material.

If you know things about U-Boot / watchdogs / i2c / mx508 / old kernels ( 2.6.35.3 please tell me what’s up!

There are a few other projects found that do similar things. I’ve tried to contact the creators but they seem lost to time.
https://gitlab.com/phreakuencies/prstux
This almost compiles. It is supposed to spit out a final flashing image called prstux.img instead just something called final_root.tar seems like it it’s missing the kernel compiling portion of the script.
http://fread.ink/
Got stuck in vagarent build issues.
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Old 05-14-2022, 09:47 AM   #2
NonaSuomy
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We are currently loading from the SDCard slot (to avoid bad eMMC’s on these units) and have a compiled kernel from the Sony sources booting but getting some eMMC can’t read errors (running the stock kernel from SDCard the unit boots fine). It seems to need to read VCOM from some place on the eMMC in this custom compiled kernel. I’m not sure where yet and why my compile doesn’t know where that is.

If anyone has a Sony PRS-T2 or PRS-T3 that can run rupor’s recovery please extract this file for me /proc/config.gz

Thank you.
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Old 05-15-2022, 10:07 AM   #3
NonaSuomy
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We successfully were able to accomplish kernel compiling with a busybox prompt. Next is to tackle that VCOM loading issue.
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Old 06-12-2022, 04:48 PM   #4
coolloser
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Location: Alberta, Canada
Device: Sony Prs-600,T2, Kobo Mini, Kobo Glo, Kobo Aura, countless Androids..
Just got my PRS-T1 back and am looking forward to this possibly happening!
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