custom build A13 tablet similar Q88 board

[Thedemon007]

Hello i successful compile kernel for my chinese tablet and work but usb host no work.

 

# modprobe g_ether
modprobe: ERROR: could not insert 'g_ether': No such device

I use this configuration in kernel: https://pastebin.com/gWJWtRav  i use base image cubieboard 1 legacy, script.bin for A13-SOM and uboot from archlinux uboot-a13-olinuxino-2017.01-2-armv7h.pkg.tar.xz ..

 

Work:

Wifi Realtek RTL8188CUS

Nand read/write

sdcard

Audio jack 3.5

 

No tested/No know:

LCD no can test at broken.

Touch Guddix GT811 how to test?

HYM8563S Real Time Clock (I2C). how to test?

MMA7660FC 1.5 g 3-Axis Accelerometer (I2C). how to test?

Keypad (no work show key no out)

 

[Igor]

1 hour ago, Thedemon007 said:

script.bin for A13-SOM

This is the critical part. You will need exact board configuration (script.bin) for your tablet, so you need to find it ... from stock Android, which is probably on your NAND. If you already killed it, than you need to find stock image ...

[Thedemon007]

Ok i extract script.bin from nand and copy inside boot folder, the blacklight of lcd turn on now how to can off?

 

Now the wifi usb no work... In boot the usb turn off

 

root@cubieboard:~# lsusb
unable to initialize libusb: -99

boot stdout: https://pastebin.com/0GFuPvsb i attach script.bins

 

script_bins_a13_tablet.7z

[Igor]

how do you power the tablet? is battery operational?

[Thedemon007]

Yes battery, i can too feed via dc jack....

[Thedemon007]

Yes the battery are operational.. I use bin2fex tool i try analize .bins, my original bintofex: https://pastebin.com/fJmt6j3M

olinux-som-a13.bin bintofex: https://pastebin.com/Nmc0CUkU

[Thedemon007]

Ok i solved problem with usb wifi, and turn off lcd with new script.bin ..

 

i change usb_host_init_state = 0 for usb_host_init_state = 1 .. For turn off blacklight lcd_bl_en_used = 0 and lcd_power_used = 0 ... 

 

I still can not load the module g_ether in archlinux work....

 

Power button can turn off tablet but others buttons no work i try  modprobe sun4i_keyboard

<6>input: sun4i-keyboard as /devices/virtual/input/input1
[  165.043666] input: sun4i-keyboard as /devices/virtual/input/input1

something crash if i try unload modprobe -r sun4i_keyboard 

[  295.073256] ------------[ cut here ]------------
<4>WARNING: at kernel/irq/manage.c:1196 __free_irq+0xb0/0x220()
[  295.086624] WARNING: at kernel/irq/manage.c:1196 __free_irq+0xb0/0x220()
Trying to free already-free IRQ 31
[  295.099506] Trying to free already-free IRQ 31
<d>Modules linked in:[  295.108780] Modules linked in: sun4i_keyboard(-) sun4i_keyboard(-) 8192cu 8192]

[<c0014fac>] (unwind_backtrace+0x0/0x12c) from [<c002f4a4>] (warn_slowpath_common+0x54/0x64)
[  295.138198] [<c0014fac>] (unwind_backtrace+0x0/0x12c) from [<c002f4a4>] (warn_slowpath_common+0x54/)
[<c002f4a4>] (warn_slowpath_common+0x54/0x64) from [<c002f4e4>] (warn_slowpath_fmt+0x30/0x40)
[  295.162162] [<c002f4a4>] (warn_slowpath_common+0x54/0x64) from [<c002f4e4>] (warn_slowpath_fmt+0x30)
[<c002f4e4>] (warn_slowpath_fmt+0x30/0x40) from [<c007b008>] (__free_irq+0xb0/0x220)
[  295.185618] [<c002f4e4>] (warn_slowpath_fmt+0x30/0x40) from [<c007b008>] (__free_irq+0xb0/0x220)
[<c007b008>] (__free_irq+0xb0/0x220) from [<c007b340>] (free_irq+0x30/0x4c)
[  295.204471] [<c007b008>] (__free_irq+0xb0/0x220) from [<c007b340>] (free_irq+0x30/0x4c)
[<c007b340>] (free_irq+0x30/0x4c) from [<bf08b35c>] (sun4ikbd_exit+0x14/0x28 [sun4i_keyboard])
[  295.224260] [<c007b340>] (free_irq+0x30/0x4c) from [<bf08b35c>] (sun4ikbd_exit+0x14/0x28 [sun4i_key)
[<bf08b35c>] (sun4ikbd_exit+0x14/0x28 [sun4i_keyboard]) from [<c0069768>] (sys_delete_module+0x210/0x2)
[  295.250202] [<bf08b35c>] (sun4ikbd_exit+0x14/0x28 [sun4i_keyboard]) from [<c0069768>] (sys_delete_m)
[<c0069768>] (sys_delete_module+0x210/0x2a0) from [<c000edc0>] (ret_fast_syscall+0x0/0x30)
[  295.276226] [<c0069768>] (sys_delete_module+0x210/0x2a0) from [<c000edc0>] (ret_fast_syscall+0x0/0x)
<4>---[ end trace 732765dac3ed31f5 ]---
[  295.296875] ---[ end trace 732765dac3ed31f5 ]---

If i load again give a segmentation fault and if ipressed a key a kernel pacnic! https://pastebin.com/pRjeN7Cu

 

I try too modprobe sun4i_keypad

[kpad]: sw keypad init
sw keypad fetch keypad uning configuration failed
<4>keypad: cannot find using configuration, return without doing anything!

 

Need a configuration file?

[Dais]

Hello, Thedemon007, so is there some progress in your work? Here, in 2019 I'm interested if you got working Armbian on A13 Q88 tablet? Because I have this kind of device. It's working on android, but became sooooo slow and lazy, that I started to look for linux based alternatives.