* EVIOCGKEYCODE_V2 not working for a specific driver?
@ 2021-01-27 16:28 Bastien Nocera
0 siblings, 0 replies; only message in thread
From: Bastien Nocera @ 2021-01-27 16:28 UTC (permalink / raw)
To: linux-input
Hey,
I was trying to figure out, for remotes like the one supported by the
hid-creative-sb0540 driver, what needed to be done to allow keys to be
remapped, especially the ones that don't have a mapping by default.
I think that the keymap is setup correctly in:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/hid/hid-creative-sb0540.c#n194
and pressing buttons emits events with the correct keycodes.
But using EVIOCGKEYCODE or EVIOCGKEYCODE_V2 always gives me "0" as the
keycode for all the scancodes it can go through.
I also tried evmap:
https://github.com/vovcat/evmap/
and this manages to extract 257 keys, from 00, to ff, inclusive:
sudo ./evmap -d /dev/input/event20 -p
[sudo] password for hadess:
index scancode keycode name
0 ff000000 0 RESERVED
1 ff000000 0 RESERVED
2 ff000001 0 RESERVED
3 ff000002 0 RESERVED
4 ff000003 0 RESERVED
5 ff000004 0 RESERVED
6 ff000005 0 RESERVED
7 ff000006 0 RESERVED
<snip>
256 ff0000ff 0 RESERVED
I tried reading through input.c's handling of the input_get_keycode()
and associated, and can't figure out what's wrong here.
Any ideas?
Cheers
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