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+ postmarketOS
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+
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+
+nokia rx51 (Nokia N900)
+Contributors
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+
- MartijnBraam +
- craftyguy +
What works
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+
- Booting the system +
- Kernel log to the display +
- Framebuffer graphics +
- Unlocking the root partition using the keyboard +
- Display Backlight control +
- Wayland on framebuffer +
- Module loading +
- Wifi (see Additional Info below) +
- Notification led +
- Audio playback +
- Keyboard backlight (see Additional Info below) +
- Battery capacity reporting (see Additional Info below) +
What does not work
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+
- Virtual terminal keymap is incorrect, the shift key doesn't allow entering numbers +
- Both cameras +
Links
+ +Additional info
+-
+
- Martijn's N900 has uboot installed a long time ago, I'm using sdcard boot from the bootmenu shell using
run sdboot
+ - The Neo900 (still in development) will upgrade the hardware inside of the N900, and has some nice features such as hardware sandboxing the modem. +
Wifi
+The linux-firmware package is required to provide the wl1251 firmware necessary for initializing the wifi device. (#158)
Once the device has been successfully initialized, enable it:
+$ sudo ip link set wlan0 up
+$ sudo iw wlan0 set type managedConfigure wpa_supplicant (only necessary on encrypted networks):
+$ sudo su -
+# wpa_passphrase $YOUR_SSID > /etc/wpa_supplicant/wlan0.conf
+<enter passphrase here and press Enter>
+# exitConnect to network using wpa_supplicant:
+$ sudo wpa_supplicant -Dwext -i wlan0 -c /etc/wpa_supplicant/wlan0.confIf your network uses DHCP, start the DHCP client:
+$ sudo udhcpc -i wlan0Keyboard Backlight
+There are 6 keyboard backlight LEDs that can be adjusted, they are found under /sys/class/leds/lp5523:kb{1-6}. To adjust brightness, write a value, $VAL between 0 and 255, to the brightness parameter as the root user:
for i in $(seq 1 6);
+ do echo $VAL > /sys/class/leds/lp5523\:kb$i/brightness
+doneBoot partition within postmarketos
+The boot partition can be accessed within postmarketos by mounting /dev/dm-0. This allows performing kernel updates by installing the linux-nokia-rx51 apk after mounting /dev/dm-0 to /boot.
Display
+With DRM enabled (#197), the display can be managed at this location: /sys/devices/platform/omapdrm.0/graphics/fb0/
Keyboard layout in console
+In order to set the keyboard layout for the virtual console (e.g. to take advantage of number keys on the N900 keyboard), obtain your desired language keymap file for the RX-51, such as this one.. (TODO: Need to pull 'official' vconsole keymaps from Maemo5 if they exist..).
+On the N900, install kbd-bkeymaps, either by using pmbootstrap install --add kbd-bkeysmaps on the host system or by running apk add kbd-bkeysmaps on the device itself.
The keymap must be in binary format, bmap. This can be accomplished using the loadkeys tool:
$ apk add kbd kbd-bkeymaps
+$ loadkeys -b rx51_us.map > rx51_us.bmap
+$ gzip rx51_us.bmapCompress it and copy it to /usr/share/bkeymaps/us/ on the N900.
Log into the N900, and run sudo setup-keymap, then select us and finally rx51_us.
Battery Capacity Reporting
+The current battery capacity can be found under /sys/class/power_supply/bq27200-0/capacity, and is represented as a percentage. For example, a value of 11 equates to 11%. If capacity does not exist or contains erroneous information, then your battery needs to be calibrated first. To calibrate the battery:
1) Charge it up fully, using a wall power adapter.
+2) Once it is charged up, power on the device
+3) Unplug the device and allow the battery to run all the way down until it powers off. This may take quite a while to happen (>24hrs, but can be made shorter by running a CPU intensive workload)
+4) When device powers off, plug it back into wall adapter and allow to charge up fully again. The battery and charging chip should now be calibrated.
+