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Here I'm documenting my progress on using my ac100-116 "the right way". Feel free to reach me on [[help#irc]], my nick is PaulFertser.

U-boot doesn't support the display yet. Kernel initialises and uses the integrated panel and the backlight properly. It's possible that you'll manage this with a specially prepared bootloader that will boot from external SD automatically without a serial console.

I use a toolchain compiled by Gentoo crossdev, [[putusb]], [[uboot]], Marvin's 3.0.8 kernel.

Configure u-boot with "make paz00_config" and build it with your toolchain.

I then used my laptop and an SD card, created a single ext2 partition there and unpacked the preinstalled ubuntu rootfs. Copied the uImage to root and the created modules to /lib/modules. Erased unneeded boot scripts (including network-manager) from /etc/init/. Created there a file to start getty on ttyS0, 115200 baud. Placed a suitable wpa_supplicant.conf somewhere on the card. Removed password from /etc/shadow to give me root login.

I boot the u-boot.bin via putusb, then <code>mmc dev 1; ext2load mmc 1 0x408000 uImage; set bootargs "mem=509M@0M console=tty1 console=ttyS0,115200n8 root=/dev/mmcblk1p1"; bootm</code>

Logged in, set password to 1, start "wpa_supplicant -Dnl80211 -iwlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf &", then dhclient eth0. Installed openssh-server and switched to that (because the serial console sometimes stops to function).

Installed gdisk and repartitioned from scratch /dev/mmcblk0, creating two partitions there (one for /boot, 32M should be enough), another for LVM pv. Created LVM there, with two (for now) volumes: 1G for swap, and everything else for the rootfs. mkfs.nilfs /dev/emmc-lvm/rootfs. Mounted it, and started to Debootstrap debian armhf according to the official manual (you'll need to read both installing debian and armhf chroot).

Copied /lib/firmware/rt2870.bin to the newly established system, configured /etc/network/interfaces to bring up wlan0 for my home wlan automatically. Created a symlink from /bin/true to /usr/sbin/mkfs.nilfs2 to make the boot happy.

Initramfs is a bit tricky: a workaround from http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=649288 is needed (it has a typo where .. is used instead of . and also the script should be made +x), and also i had to add lvm vgchange -aly --ignorelockingfailure to the end of /usr/share/initramfs-tools/scripts/local-top/lvm2. Add nilfs2 to /etc/initramfs-tools/modules. Make a symlink from initrd-3.0.8 to ``initramfs'' in /boot.

The resulting system should be bootable with
<code>
mmc dev 0; ext2load mmc 0 0x408000 uImage; ext2load mmc 0 0x1408000 initramfs; set bootargs "mem=509M@0M console=tty1 console=ttyS0,115200n8 root=/dev/emmc-lvm/rootfs zcache initrd=0x1408000,0x${filesize}"; bootm 0x408000
</code>

You can hardcode this command line by adding
<code>
#define CONFIG_BOOTCOMMAND     \
       "mmc dev 0; ext2load mmc 0 0x408000 uImage; ext2load mmc 0 0x1408000 initramfs; set bootargs \"mem=509M@0M console=tty1 console=ttyS0,115200n8 root=/dev/emmc-lvm/rootfs zcache initrd=0x1408000,0x${filesize}\"; bootm 0x408000"
</code>
to include/configs/paz00.h and recompiling u-boot.

If you want to flash uboot as your main bootloader, get the dump of your part2 (DCT) with [[putusb]], use bct_dump to dump the current config to file, add <code>BootLoader    = u-boot.bin,0x00108000,0x00108000,Complete;</code> in there and create a new image with cbootimage. Then either flash it with putusb or from a running system by "echo 0 > /sys/block/mmcblk0boot0/force_ro; dd if=newdct.bin of=/dev/mmcblk0boot0".

I managed to successfully recompile u-boot on the device itself using the Debian hardfloat native toolchain, but i needed this patch to bct_dump:
<code>
diff --git a/parse.c b/parse.c
index 1005ebc..c9153a1 100644
--- a/parse.c
+++ b/parse.c
@@ -913,7 +913,7 @@ void process_config_file(build_image_context *context)
 {
        char buffer[MAX_BUFFER];
        int  space = 0;
-       char current;
+       int current;
        u_int8_t c_eol_comment_start = 0; // True after first slash
        u_int8_t comment = 0;
        u_int8_t string = 0;
</code>

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