N900 Old overview
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Overview
- Audio/Power Management Chip is TWL4030 (same as Palm Pre)
- /sys/class/i2c-adapter/i2c-1/1-0048
- Accelerometer is LIS302DL (same as Freerunner)
- /sys/class/i2c-adapter/i2c-3/3-001d
- Vibrator is controlled via led interface
- /sys/class/leds/twl4030\:vibrator/
- Proximity Sensor
- /sys/devices/platform/gpio-switch/proximity/
- state will return open/closed, so just 0% or 100%
- Ambient Light Sensor
- /sys/class/i2c-adapter/i2c-2/2-0029
- lux file will return the brightness
- Power Button: /dev/input/event0
- Keyboard: /dev/input/event1
- Touchscreen: /dev/input/event3
- Video Cable Detection
- /sys/devices/platform/nokia-av
- What to do about different special buttons?
- /sys/devices/platform/gpio-switch/cam_shutter/state -> open/closed
- camera LEDS should be available only if cam_shutter is opened
- /sys/devices/platform/gpio-switch/headphone/state -> connected/disconnected
- We need to reroute audio when somebody inserts a headphone
- /sys/devices/platform/gpio-switch/slide/state -> open/closed
- We should enable and disable keyboard leds according to state
- /sys/devices/platform/gpio-switch/cam_shutter/state -> open/closed
- GPS is connected via gsm modem - I haven't checked the details yet
- What to do about the cameras (video/photo)? What about tagging photos (geotag, time, whatever)? Cameras are Video4Linux devices on N900 btw.
- There's an FM receiver, but I guess we can ignore this one for now. We need a multimedia daemon for this, which could also handle DVB-H on other devices.
- There's an FM transmitter. There should be audio routing support for it in the new audio manager. It is available as /dev/radio0 on n900.
- Keyboard LEDs, status LED (exported via led interface on sysfs)
- different Buttons - I did not check this yet
LEDs
sysfs
- /sys/bus/i2c/drivers/lp5523/2-0032
- selftest
- engine1_mode
- engine2_mode
- engine3_mode
- leds:lp5523:r
- leds:lp5523:g
- leds:lp5523:b
- leds:lp5523:kb1
- leds:lp5523:kb2
- leds:lp5523:kb3
- leds:lp5523:kb4
- leds:lp5523:kb5
- leds:lp5523:kb6
engineX_mode: disabled
This pattern mode is not used.
engineX_mode: load
You can setup a pattern by writing into engineX_load and engineX_leds. engineX_leds takes a string which led's should be lighten by this pattern in form of bits ("0000rgb00"). The 0's are the 6 LEDs below the keyboard and the rgb are the colored LEDs from the status LED. The file engineX_load takes the pattern in which the LEDs should be lightend. Check LED patterns from maemo wiki
engineX_mode: run
The pattern configured in load mode will run until mode is changed again.
warning
Do not try to use trigger on LEDs while an engine is running on this LED. My N900 restarted due to this.
Free/Nonfree parts of Maemo5
http://wiki.maemo.org/Free_Maemo
As you can see basically the part FSO handles and parts of the UI are closed source, but the drivers in the kernel are free!
/proc/cpuinfo
Processor : ARMv7 Processor rev 3 (v7l) BogoMIPS : 499.92 Features : swp half thumb fastmult vfp edsp neon vfpv3 CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x1 CPU part : 0xc08 CPU revision : 3 Hardware : Nokia RX-51 board Revision : 2101 Serial : 0000000000000000
GSM
phonet0 is the control interface for the modem
phonet0 Link encap:UNSPEC HWaddr 15-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
UP POINTOPOINT RUNNING NOARP MTU:4000 Metric:1
RX packets:60703 errors:0 dropped:0 overruns:0 frame:0
TX packets:11579 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:9155288 (8.7 MiB) TX bytes:631392 (616.5 KiB)
gprs0 is the data interface for the modem (ignore the name - it's also for umts)
gprs0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:XXX.XXX.XXX.XXX P-t-P:XXX.XXX.XXX.XXX Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MTU:1400 Metric:1
RX packets:310 errors:0 dropped:0 overruns:0 frame:0
TX packets:313 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:10
RX bytes:98693 (96.3 KiB) TX bytes:29560 (28.8 KiB)
- SIM access, Network Registration, Initiating calls work, 3G works
- Here are the Phonet Implementation details
