qemu with Z2 support

I spent some days getting qemu to emulate some Z2 hardware, and got some results :)

Almost all hw is emulated, it lacks only voltage regulator and WiFi, but it's not easy to implement Marvell's WiFi chip, because there's no datasheet, and anyway it makes no sense. Also screen rotation is not supported (yet).

Stock bootloader - blob - (with slight modification) and stock kernel works. Blob puts Z2 into deepsleep on reset, so I hacked it not to do this.

How to compile qemu:

• git clone git://github.com/anarsoul/qemu-z2.git
• cd qemu-z2
• ./configure --audio-drv-list=alsa --target-list=arm-softmmu
• make -j4
• arm-softmmu/qemu-system-arm binary is what you need.

So, how to hack blob:

• put your blob image (first 64kb of NOR) somewhere
• convert it to hex representation with xxd: xxd mtdblock1.bin >mtdblock1.hex
• apply patch onto mtdblock1.hex
• convert hex back to bin: mv mtdblock1.bin mtdblock1.bin.bak; xxd -r mtdblock1.hex >mtdblock1.bin

I don't put modified nor original blob binary anywhere, as I doubt it's legal.

How to run stock sw:

• cd qemu-z2; mkdir z2; wget http://downloads.tuxfamily.org/linuxrx1950/tmp/z2_start.sh
• Combine mtdblocks into one flash image: cat mtdblock1.bin >z2_flash; cat mtdblock2.bin >>z2_flash; cat mtdblock3.bin >>z2_flash
• So, z2 directory contains following files: z2_start.sh, z2_flash
• Now just start z2_start.sh script

How to run latest kernel:

• Use same z2_flash and z2_start.sh files from z2 directory
• You'll also need kernel image - zImage (not uImage!)
• Start z2_start.sh as follows: ./z2_start.sh -kernel zImage -append console=tty0

You can also use SD card image, just specify -sd image.filename as argument to z2_start.sh script

Update (2013-Nov-27): link to blob patch is updated!