ADB-USB: Adjustable keyboard media buttons doesn't work

[tmk]

http://geekhack.org/index.php?topic=14290.msg1408316#msg1408316
"
I confirmed the issue you mentioned on Adjustable Keyboard, the keyboard stops working and only replys with error code 'FFEF' instead of keycode after those media keys are pressed.

Hmm, those media keys don't yield a keycode unlike other keys, it may need some special initialization or procedure to get keycode of the keys. we'll need to look for the information among old apple documentations.
"

[tmk]

DEBUG: matrix enabled.
adb_host_kbd_recv: 87FF
r/c 01234567
00: 00000000
01: 00000000
02: 00000000
03: 00000000
04: 00000000
05: 00000000
06: 00000000
07: 00000000
08: 00000000
09: 00000000
0A: 00000000
0B: 00000000
0C: 00000000
0D: 00000000
0E: 00000000
0F: 00000001
adb_host_kbd_recv: FFFF
r/c 01234567
00: 00000000
01: 00000000
02: 00000000
03: 00000000
04: 00000000
05: 00000000
06: 00000000
07: 00000000
08: 00000000
09: 00000000
0A: 00000000
0B: 00000000
0C: 00000000
0D: 00000000
0E: 00000000
0F: 00000000
adb_host_kbd_recv: FFEF
adb_host_kbd_recv: ERROR(-17)
adb_host_kbd_recv: FFEF
adb_host_kbd_recv: ERROR(-17)
adb_host_kbd_recv: FFEF
adb_host_kbd_recv: ERROR(-17)
adb_host_kbd_recv: FFEF
adb_host_kbd_recv: ERROR(-17)
adb_host_kbd_recv: FFEF
adb_host_kbd_recv: ERROR(-17)
adb_host_kbd_recv: FFEF
adb_host_kbd_recv: ERROR(-17)
adb_host_kbd_recv: FFEF
adb_host_kbd_recv: ERROR(-17)
adb_host_kbd_recv: FFEF
adb_host_kbd_recv: ERROR(-17)
adb_host_kbd_recv: FFEF
adb_host_kbd_recv: ERROR(-17)
adb_host_kbd_recv: FFEF
adb_host_kbd_recv: ERROR(-17)
adb_host_kbd_recv: FFEF
adb_host_kbd_recv: ERROR(-17)
adb_host_kbd_recv: FFEF
adb_host_kbd_recv: ERROR(-17)
adb_host_kbd_recv: FFEF
adb_host_kbd_recv: ERROR(-17)
adb_host_kbd_recv: FFEF
adb_host_kbd_recv: ERROR(-17)

[tmk]

After pressing media key on Adjustable keyboad it starts 'Service Request' to send the scan code.
tmk adb converter supports just one keyboard and doesn't handle 'Service Request' so it fails to receive a code after that.

To receive from Adjustable keyboard adb.c is fixed to ignore 'Service Request' adhoc.(79840c6) Note that the mediakeys are not supported, just ignored.

Adjustable keyboard seems to be a composite device comprised of main-part keyboard and meidia key-part device. To read its meidakey-part scan code tmk will need to support multiple devices with handling 'Service Request' proplerly.

[tmk]

Adjustable keyboard's media keys are supported now.
1bce71f

The keyboard has two address; 0x02 for main keyboard part and 0x07 for media keys. So converter has to poll the two address.

'Service Request'(Srq) will contribute to polling efficiency when you have to poll multiple addresses but it is not supported now.

[tjweir]

This is awesome!