Modems
From freesmartphone.org
Contents |
By Phone
openmoko freerunner
- The openmoko freerunner has a modem that speaks AT commands over a real serial port
- the GPS and the audio CODEC are not attached to the modem, but to the main CPU
HTC Dream
- The GPS(nmea on /dev/smd27,need an activator named gps) and the audio DSP are connected to the modem
The HTC Dream's modem can be accessed trough:
- AT commands on a virtual serial port(/dev/smd0) (preferred way),the virtual serial port is an abstraction on top of shared memory
Palm pre
- The GPS is connected to the modem
The palm pre's modem can be accessed trough:
- AT command on the serial port (incomplete way)
- the way used by msmcommd:
- Link Layer (mostly the same as found in the bluetooth HCI uart protocol)
- The HCI protocol (not the same like the bluetooth HCI protocol)
- The msmcomm protocol on top of it
Nokia N900
- The GPS only is connected to the modem(not the audio CODEC)
The Nokia N900's modem can be accessed trough:
- the phonet0 network interface(speaks only phonet) /dev/cmt_speech are over an HSI serial link
A page exists on the Phonet_Implementation
Nexus one
- The GPS(nmea on /dev/smd27,need an activator) and the audio DSP are connected to the modem
The Nexus one's modem can be accessed trough:
- AT commands on a virtual serial port(/dev/smd0) (preferred way), the virtual serial port is an abstraction on top of shared memory
By modem
AT
Some modems use AT like the openmoko devices, but also some of the devices with a qualcomm SOC(like the htc dream and the nexus one). It is implemented by fsogsmd.
msmcomm
The msmcomm protocol can be found in palm/hp devices like the palm-pre,palm pre plus, palm pre 2,but also hp veer. It is implemented by msmcommd+fsogsmd
ISI
ISI can be found in the nokia n900 modem and is partially implemented in libgisi+fsogsmd
Samsung
a library exist for msm modems in samsung phones, like for instance the Samsung H1
