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Linux in ARM926EJ-S 248Mhz

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126 Re: Linux in ARM926EJ-S 248Mhz on Fri 17 Aug 2012 - 9:01


Type of things that SHOULD be observed on screen if HaRET succeed booting and finding display adress :

HaRET boot
Shutting down hardware
Turning off MMU
In preloader
Tags relocated
Kernel relocated
Initrd relocated
Checking tags crc... okay
Checking kernel crc... okay
Jumping to kernel

For the moment I don't observe anything reliable..

127 Re: Linux in ARM926EJ-S 248Mhz on Sat 25 Aug 2012 - 3:13


hola me pueden ayudar a instalar windows ce de nuevo en mi lap china modelo ks-umpc070va arm 926ej-s 248mhz

128 Re: Linux in ARM926EJ-S 248Mhz on Sat 25 Aug 2012 - 8:23


Hola, parece que el modelo KS-EYO UMPC070VA tiene un procesador VIA8505, debemos buscar en este foro:

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129 Re: Linux in ARM926EJ-S 248Mhz on Sun 26 Aug 2012 - 19:06


How to get further according to cr2 in XDA Developers. Questions, Answers and HowTo.

Q> Do I need to tell HaRET about my framebuffer address?
R> No. First, haret knows the address, but it's the Linux kernel business to deal with the hardware.

Q> Does the kernel need information about the video chipset?
R> Since your framebuffer address is not in RAM, the dedicated kernel video driver is needed (i.e. not PXA LCD driver), and it needs some information where the hardware is located.

Q> What is needed to make HaRET talk over the USB serial connection?
R> You need the USB kernel driver for that, and you don't need synce, but the usb tty driver (usbserial). For that you should know which USB chipset is used (with 99% probability it is PXA UDC).

What you should do is as follows:

0>. Describe you hardware : what does it have ?
MMC/SD/CF/PCMCIA ? RS232 cable ? USB ? IR ? Camera ? Wifi ? Bluetooth ? Ethernet ? etc.
1>. Can you open the device box ? If yes, make the motherboard and parts photos and make them available over internet.
2>. Run some WinCe programm that shows the serial ports, then we can guess what of them are used and how. (Using the PHM Device Manager for instance)
2a>. Dump the WinCe registry in the human-readable form.
3>. Split the rom and run '$strings' and '$strings -el' on the files, or just on the rom itself.
Dump your rom with HaRET and with itsutils (pmemdump) . Do they produce the same output ? itsutils download here :

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Post the dumped first 8192 bytes (or a bit more) in XDA or to a forum where to get help.
5>. Now things become hard and should be handed over to the people who know better Cool

Q> Trying a new kernel with the information about the video chip, of course without any booting result.
R> You need to feed the framebuffer address to the driver, because the video chip is memory mapped somewhere around it. If you have the documentation and a linux driver, so look there. It's also worth looking into the .data section of the WinCe video driver (if you have it), or somewhere in .text in between.
Make the gpio tracelogs with 'wgpio 60' and transfer something over IR, make a GSM call, call your PDA from another phone, etc.

130 Re: Linux in ARM926EJ-S 248Mhz on Tue 28 Aug 2012 - 9:13


How To use the above itsutils utilities

- unpack utils on PC at C:\itsme
- connect device to PC via ActiveSync
- run CMD (Command line Shell)
- run command, for example :

C:\itsme\pmemdump.exe 0x00002000 0x00000000 C:\itsme\romdump.txt

command syntax can be found here :
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131 Re: Linux in ARM926EJ-S 248Mhz on Wed 29 Aug 2012 - 16:04


Linux with HaRET bootloader, a few questions among others..

- Is HaRET version adapted for the device?
- Does the display framebuffer works?
- Are default.txt parameters in HaRET (aside cmdline) optimised?
- Are kernel parameters in cmdline had hoc?
- Is the kernel version convenient?
- Are the drivers OK and no responsible for hanging?
- Is the rootfs suitable?
- Have we got the proper libraries versions?
- Is the initialisation script well written?

132 Re: Linux in ARM926EJ-S 248Mhz on Tue 2 Apr 2013 - 0:43


Some time ago I found a firmware for ak8802 device which supposedly uses Linux. Not sure if it is of any use but here is the link for download [You must be registered and logged in to see this link.] It is for this Device:S80 courses and languages translator

133 Re: Linux in ARM926EJ-S 248Mhz on Sat 3 May 2014 - 21:37


Another Linux source for Anyka devices - [You must be registered and logged in to see this link.]

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