rEVERSING THE SOURCE CODE

• KernelPort26CutAndPaste
• HwTerms : terms used in the documentation

Hardware to support

hardware	status	comments
mtd	ok	With or without proprietary mtdblock?
serial console	ok
RTC	not done
sound	not done
keyboard
lcd fb	ok
lcd bl	not done
lpc915 battery charger	not done
mmc/sd	ok	does not work when card is inserted on boot
Power Management (sleep, suspend)	NOK	do not even try it!

Difference between skytone and ingenic pmpv1 board drivers

• LPC915 communications. The LPC915 is probably used as the battery charger. (called MCU in the source in minipc-misc)
• LCD controller specifics (Jzlcd.h)
• Keyboard driver (minipc-kbd.c)

The remainder seems like tweaks and stuff to enable recovery things.

The 2.6 version

• only knows about PMP v2 for the jz4730
• The pmp boards are configured with a 12MHz clock, and the minipc with a 3.something. Serial console divisor is directly depending on the configured clock. http://projects.kwaak.net/twiki/bin/view/Epc700/InternalPics?id=1&filename=IMG_0819.JPG#igp1 The system clock is 3.6864MHz

Decisions decisions:

• Go for 2.6.27 or for 2.6.24 (ingenic supported) -> 2.6.24
• Hack in the lcd, or add a new lcd -> New lcd
• Hack in the machine, or add a new ingenic machine -> new machine based on pmpv2

Steps

PMP based

• Get the lcd working (important because we don't want to kill the display)
• Get the serial console working (important because that makes life easier)

New machine based

• Clone the pmp code into a new machine
• Revert the pmp code
• Redo lcd patch (generic lcd driver/machine specific GPIO settings)
• Get the keyboard working (so we can type)
• Port LPC915 MCU stuff

Milestone 1?

• Send patches/demo to skytone
• suspend(2ram) (any kind of suspend will do for me)
• tickless keyboard scanner

Milestone 2?

• force ingenic patches upstream by porting to latest kernel and sending to linux-mips maintainer
• re-engineer proprietary MMC driver

LOG

ard@lennydev64:~/nas/src/epc/kernel/svn/minibook-kernel/linux-2.6.24.3-minibook$ make pmp_defconfig
ard@lennydev64:~/nas/src/epc/kernel/svn/minibook-kernel/linux-2.6.24.3-minibook$ make menuconfig
ard@lennydev64:~/nas/src/epc/kernel/svn/minibook-kernel/linux-2.6.24.3-minibook$ make uImage

Current status

• http://www.kwaak.net/~ard/fotos/l-2.6.24.3-ingenic-a400.diff patches against ingenic 2.6.24.3 kernel
• http://www.kwaak.net/~ard/fotos/uImage-current A straight link to my devel tree

This stuff can kill your minipc! Always be prepared to run in your system again. Do not ever flash this kernel to your minipc, only boot from sd.