Unable to pass certain IR remote key codes to Android

Question

I'm trying to use an IR remote to pass certain key codes to Android. So far, I'm able to pass numeric keys (0-9) and D-pad keys (up, down, left, right, enter). Now I'm trying to extend the keys to include other characters like a-z.

The code that I'm modifying is an IR driver in the Linux kernel part of Android. It's similar to this driver. However, when I pass a value like KEY_A (maps "a" to 30: defined in Linux's include/linux/input.h), Android doesn't see it.

The section of code that passes the command up is the following:

        input_report_key(cir->input, cir->last_key, 1);
        input_report_key(cir->input, cir->last_key, 0);
        input_sync(cir->input);

When I print cir->last_key, I can see the value 30 when I press the "a" button. However, I'm not sure how to trace the code from here to Android to see where the button press is being dropped.

In Android, I have a file called /system/usr/keylayout/qwerty.kl that maps values, e.g. 30 maps to "a". The problem is Android never gets the value of 30 when I press "a".

Answer 1

The keybit field of this structure has to be set to include all the key codes being passed.

For example,

set_bit(KEY_A, input_dev->keybit);