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Allwinner A13 Chinese Tablet
90% of info will come from: https://linux-sunxi.org/Main_Page
- Board model: TW_A0910_16B_V1.1_0830 (silkscreened). The id tag is searchable as "TW_A0910"
- Manufacturing: 2013 08 30 (silkscreened)
- Screen size: 9" , 800x480
- touch controller: gslx680 - https://github.com/jabjoe/sunxi-gslx680
- Extracted kernel module (.ko), and firmware(.fw)[really just a register values for settings] from driver: https://jii.moe/4kLOCPMVl.tar.gz / sha256sum: 29d2218ba11ef76dc51c5f949a2c53e7f2ce1677b28782178d30ba1fab1c027e
- wifi: Realtek RTL8188 - has been in linux kernel forever at this point
- Power management: AXP209 - drivers should already be in linux-arm-kernel / datenblatt: https://linux-sunxi.org/AXP209
- Flash: Hynix
- RAM: 256X16 DDR3 Generic (4GB)
- FEL mode procedure
- Detach all wiring.
- Hold volume and power for about 3 secs. Screen will remain black, but green light should turn on.
- Connecting USB and running lsusb should give you a device with an ID of 1f3a:efe8
- Build sunxi-tools and "$ ./sunxi-fel ver" should return a string like: AWUSBFEX soc=00001625(A13) 00000001 ver=0001 44 08 scratchpad=00007e00 00000000 00000000
- No obviously exposed UART/JTAG - might be tied to uSD slot
- Entering FEL is part of the boot process (handled by the masked BROM): https://linux-sunxi.org/Boot_Process
- The BROM, proper: https://linux-sunxi.org/BROM
- LiveSuit factory flashing software (Linux, OSX, Win) for Allwinner: http://linux-sunxi.org/LiveSuit
- 'PhoenixSuit' (may be Windows only): https://github.com/linux-sunxi/sunxi-livesuite
Bootloader & Onboard Flash
- A13 is now mainlined on U-boot
- Caveat is that to run completely from the NAND Flash (MTD device), you need some patches
- MTD device driver as well for using the onboard flash directly
- VERY IMPORTANT info over here on how to do that: https://linux-sunxi.org/Installing_to_NAND
- nand-part is used to build the descriptor. Remember to keep partitions for the chain loaders.
- Reusing older sources: https://linux-sunxi.org/Linux_Kernel [most likely not necessary to reuse, because of Mali400 being pretty opensource now]