[Arm-netbook] evaluating rk3188

[FUKAUMI Naoki]

hi

On 07/31/2013 11:58 PM, Stefan Monnier wrote:
 > I did a plain `dd' and now it doesn't boot any more.  It appears to get
 > into bootloader mode now.
 >
 >> bootloader mode, bootloader(currently made by rockchip only) is 
loaded from
 >> flash or USB, it should be possible to read/write RAM, NAND and
 >> IDB(bootloader) via USB.
 >> rkflashtool can read/write NAND and can read RAM/IDB for now.
 >
 > After my use of `dd' my mk808b boots into a mode where `rkflashtool'
 > accepts to read and write.  Only problem is that the write doesn't seem
 > to work: after "erase" I read all 0xff values, as expected, but after
 > any "write", I only "read" \x00 values.

are you sure it's bootloader mode? if it's mask rom mode, rkflashtool 
can't do anything(for now I'm not sure how rkflashtool returns, but I'm 
sure it doesn't do any meaningful work).

 > Any idea what might be going on, and how I might install a working
 > firmware again (at this point, any firmware would do, tho what I'd like
 > is to install Debian on it).

(if you are developer and you can build working bootloader/kernel 
yourself, please ignore below)

if it's mask rom mode, please use RKAndroidTool.exe or RKBatchTool.exe 
or something like that on Windows, and flash official firmware image.

firmware includes bootloader and kernel, these are device specific. you 
must use correct one for your device. (bootloader may be same as others, 
but kernel will not)