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debian_uboot [2012/01/22 10:38] – Correct root= device to make initramfs work without additional tweaks paulf | debian_uboot [2016/10/24 15:59] (current) – [Installation and initial configuration story] fix s/set/setenv/ typo paulf |
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| ====== Debian hardfloat with upstream U-Boot ====== |
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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. | 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. |
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| **UPDATE 24 Oct 2016**: migrated the system to current upstream U-boot and Linux. Everything seems to be nice and reliable. The limitations section still applies. |
| Some notes on update: |
| * Needs the latest (from firmware git) ''rt2870.bin'' for stable wifi |
| * Missing ''nvec_event'' so lid open/close events are not generated |
| * To be able to use ''synaptics'' X.org driver the ''elantech'' protocol needs to be forced for ''psmouse'' kernel driver |
| * ''mpv'' works nicely for unaccelerated video playback, including streaming from Youtube and other popular hostings (''ytdl-format=18'' is usually needed) |
| ===== Status ===== |
| ==== What works ==== |
| * Booting (currently fetching kernel+rootfs is a bit slow due to u-boot bug, ~15s) |
| * Display (both text console and X.org fbdev), keyboard, touchpad |
| * Wifi |
| * Bluetooth |
| * GSM/UMTS data transfer |
| * Stereo sound both on internal speakers and the headphones |
| * Webcam |
| * Integrated digital microphone |
| * External stereo headset with microphone |
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| ==== What doesn't ==== |
| * LCD and keyboard in u-boot (pending upstream patches and paz00 integration, http://news.gmane.org/group/gmane.comp.boot-loaders.u-boot/thread=122864, for keyboard NVEC support would be needed) |
| * Boot from USB in u-boot (http://news.gmane.org/group/gmane.comp.boot-loaders.u-boot/thread=122484) |
| * Resume from suspend-to-ram (pending u-boot warmboot patches, see http://news.gmane.org/group/gmane.comp.boot-loaders.u-boot/thread=122760) |
| * Suspend-to-disk/hibernation (not anytime soon, no upstream support for ARMs) |
| * tegra_wdt watchdog resets the system but it doesn't boot after that for the reasons unknown |
| * Proprietary drivers for X and OMX-accelerated sound/video decoding (never tried, see https://build.pub.meego.com/package/files?package=nvidia-tegra2&project=home%3Acxl000%3Atrimslice%3AMer%3Atesting , http://ppa.launchpad.net/ac100/ppa/ubuntu/pool/restricted/n/nvidia-graphics-drivers-tegra/ , mplayer-omx, gst-omx etc) |
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| ===== Installation and initial configuration story ===== |
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. | 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. |
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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 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. |
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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> | I boot the u-boot.bin via putusb, then <code>mmc dev 1; ext2load mmc 1 0x408000 uImage; setenv bootargs "mem=509M@0M console=tty1 console=ttyS0,115200n8 root=/dev/mmcblk1p1"; bootm</code> |
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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). | 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). |
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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). | 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, though debian-ports.org repositories are not needed). |
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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. | 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. |
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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 you need to pay attention to using ''/dev/mapper/emmc--lvm-rootfs'' and not ''/dev/emmc-lvm/rootfs'' for the ''root='' kernel command line argument (see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=612402) or else initramfs won't call ''vgchange -ay automatically''. Add ''nilfs2'' to ''/etc/initramfs-tools/modules''. Make a symlink from ''initrd-3.0.8'' to ''initramfs'' in ''/boot''. | 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 you need to pay attention to using ''/dev/mapper/emmc%%--%%lvm-rootfs'' and not ''/dev/emmc-lvm/rootfs'' for the ''root='' kernel command line argument (see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=612402) or else initramfs won't call ''vgchange -ay automatically''. Add ''nilfs2'' to ''/etc/initramfs-tools/modules'' (if you're using ''MODULES=most''). Make a symlink from ''initrd-3.0.8'' to ''initramfs'' in ''/boot''. You'll also need a custom initramfs-tools addon script to add nilfs_cleanerd to the initramfs or you'll need to start it later from e.g. /etc/rc.local. |
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The resulting system should be bootable with | The resulting system should be bootable with |
<code> | <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/mapper/emmc--lvm-rootfs zcache initrd=0x1408000,0x${filesize}"; bootm 0x408000 | mmc dev 0; ext2load mmc 0 0x408000 uImage; ext2load mmc 0 0x1408000 initramfs; setenv bootargs "mem=509M@0M console=tty1 console=ttyS0,115200n8 root=/dev/mapper/emmc--lvm-rootfs zcache initrd=0x1408000,0x${filesize}"; bootm 0x408000 |
</code> | </code> |
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<code> | <code> |
#define CONFIG_BOOTCOMMAND \ | #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/mapper/emmc--lvm-rootfs zcache initrd=0x1408000,0x${filesize}\"; bootm 0x408000" | "mmc dev 0; ext2load mmc 0 0x408000 uImage; ext2load mmc 0 0x1408000 initramfs; setenv bootargs \"mem=509M@0M console=tty1 console=ttyS0,115200n8 root=/dev/mapper/emmc--lvm-rootfs zcache initrd=0x1408000,0x${filesize}\"; bootm 0x408000" |
</code> | </code> |
to ''include/configs/paz00.h'' and recompiling u-boot. | to ''include/configs/paz00.h'' and recompiling u-boot. |
</code> | </code> |
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To manage lid event i'm using https://github.com/gandro/input-event-daemon, it should listen on /dev/input/event4 for LID:0 and LID:1 events. | And then be sure to read suckless [[tips_and_tricks]]. |
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Playing mp3's (with libmad-based players) currently is buggy due to http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=656814 , fix available. | |