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projects:kindlepw5 [2022/10/02 18:30] – trimen | projects:kindlepw5 [2022/10/31 12:47] – trimen | ||
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-< | -< | ||
-U-Boot CLI\\ | -U-Boot CLI\\ | ||
- | -< | + | -< |
-Reverse engineering of unlocking mechanism\\ | -Reverse engineering of unlocking mechanism\\ | ||
+ | -< | ||
- | ====Overwirev==== | + | ====Overview==== |
In the new Kindle PW5, Amazon started using different CPU from previous models. Kindle PW5 is using Mediatek MT8113, bundled with 512Mb RAM.\\ | In the new Kindle PW5, Amazon started using different CPU from previous models. Kindle PW5 is using Mediatek MT8113, bundled with 512Mb RAM.\\ | ||
All production devices are locked, which means you cannot use u-boot CLI because on a locked device there is forced execution of fastboot command followed by boot command when you try to access u-boot CLI.\\ | All production devices are locked, which means you cannot use u-boot CLI because on a locked device there is forced execution of fastboot command followed by boot command when you try to access u-boot CLI.\\ | ||
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Amazon also removed debug UART connector from the PCB.\\ | Amazon also removed debug UART connector from the PCB.\\ | ||
On the production devices, the UART Linux shell is disabled.\\ | On the production devices, the UART Linux shell is disabled.\\ | ||
+ | 28-10-2022: | ||
+ | If u-boot fails to load the kernel from eMMC, it enters fastboot.\\ | ||
+ | |||
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{{https:// | {{https:// | ||
+ | ====eMMC interposer: | ||
+ | In order to be able to easily modify, read out, and backup content of the eMMC chip, I created an interposer with the connector on which the board with the eMMC chip is placed.\\ | ||
+ | Pinout was chosen to match the PINE64 eMMC module and [[https:// | ||
+ | 31-10-2022\\ | ||
+ | PCBs arrived along with the reballing stencils and balls. | ||
+ | |||
+ | Files are available at GitLab [[https:// | ||
====Boot log:==== | ====Boot log:==== |