[android-kernel] Re: KEYCODE for headset button press

[Porting beginner]

On Fri, Feb 19, 2010 at 1:18 PM, Porting beginner <

On Fri, Feb 19, 2010 at 1:06 PM, Karthik Kannappan <

key 164 MEDIA_PLAY_PAUSE WAKE
key 128 MEDIA_STOP WAKE
key 163 MEDIA_NEXT WAKE
key 165 MEDIA_PREVIOUS WAKE
key 168 MEDIA_REWIND WAKE
key 159 MEDIA_FAST_FORWARD WAKE
Ok guys, I think I didn't put my question in right way, let me try again.

I have all these details and its working as below.
case 1; With KEYCODE_CALL, I can answer incoming call by pressing my
headset button.
case 2: With KEYCODE_ENDCALL , i can end the call by pressing my headset
button.
But as I have headset with one button, I can report only one keycode at a
time , either KEYCODE_CALL or KEYCODE_ENDCALL
and not both.
My goal is that no matter whats the phone status, in-call or not, when I
press button, it would take proper action, take a call or end call if
already in-call.
If you have two button on headset, you can give CALL or ENDCALL for each
button and it would be fix and dedicated.
i.e press button1 to receive call, press button2 to end call
But with only one button, how you do this ? Is that needed to add this
toggle logic in android framework ?
is this logic already implemented in Android framework ?
Again, my goal is
Headset with one button, is that anything headset driver can do to
implement above logic or its should only taken care in framework ?
Hi ,

I have resolved this issue with code change in PhoneWindowManager.java in
Android framework.
Here for KEYCODE_CALL, I have added condition to check, whether already
in-call or not.
If already in-call, on this event, end the incoming call otherwise answer
the incoming call.

This toggle logic works for me, now I can have same headset button sending
one key map with KEYCODE_CALL and I can either
answer or end the incoming call my pressing same button.

I think this should be part of framework itself or someone should add this
condition to make this generic feature works.
Can I submit this as a patch for Android ?

Hi,
I am trying from few days but don't get any information related to

issue as

below.
Which KEYCODE to send to input dev ( /dev/input/event2 here ) on

headset

button press event from my
headset driver so can answer / hang-up call ?

Button presses are interpreted as input event (KEY_MEDIA). Button
presses
are ignored if the headset is plugged in, so the buttons on 11 pin
-> 3.5mm
jack adapters do not work until a headset is plugged into the
adapter. This
is to avoid serial RX traffic causing spurious button press
events.
Also I don't think you want to inject it into the event file
static void button_pressed(void)
{
printk(KERN_INFO "[H2W] button_pressed\n");
atomic_set(&hi->btn_state, 1);
input_report_key(hi->input, KEY_MEDIA, 1);
input_sync(hi->input);
}
You will also want to read Documentation/input/input-programming.txt
Finally you might want to learn about the -R flag to grep ;-)
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Thanks