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Testing GSM <-> BT

Basics: We need to tell audio codec to route sound from GSM chip to BT chip. Codec is controlled by ALSA and mixer settings.

Prerequisites: BT device must be paired before the operation.

Step one: powering on bluetooth, setting up bluetoothd, pairing

Set /etc/bluetooth/audio.conf like this:

 # SCO routing. Either PCM or HCI (in which case audio is routed to/from ALSA)   
 # Defaults to HCI                                                               
 SCORouting=PCM                                                                  

Then

 echo 1 > /sys/bus/platform/devices/neo1973-pm-bt.0/power_on
 hciconfig hci0 up
 bluetoothd

then use simple-agent from here: http://wiki.openmoko.org/wiki/Manually_using_Bluetooth#Pair to pair the device.

Test: "hcitool con" should say:

 Connection
     ACL 00:13:17:78:7B:A3 handle 0 state 5 lm MASTER

Step two: make a call

Call to the phone and answer (or place a call, whichever is cheaper).

Step three: load ALSA settings to switch codec "mode" to GSM <=> BT

Wait till frameworkd sets its statefile and then overwrite it with your own:

 alsamixer restore /path/to/the/statefile

Then due to kernel bug, do:

 amixer sset "Capture Left Mixer" "Analogue Mix Right"
 amixer sset "Capture Left Mixer" "Analogue Mix Left"

Then issue dbus call (check what it is exactly):

 org.bluez.Headset Play()

We would also need to set bluetooth IIS to 8000 rate (probably left by now).

We should hear something in the BT headset and not in phone's speaker.

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