HID: wiimote: add support for Guitar-Hero devices

This adds the drums and guitar extensions for Wiimote devices.

Devices are reported as "Nintendo Wii Remote Guitar/Drums". If I ever
get my hands on "RockBand" guitars, I will try to report them via the
same interface so user-space does not have to bother which device it
deals with.

This is a rebase of the original commits 8e22ecb603c8 and 73f8645db191.
They were reverted several years ago, since they were dependent on the
ABS_* rework of the input core. Sadly, this never worked out so these
commits were never pushed into a release. This rebase now uses the
ABS_HAT* event codes to report all pressure information.

Signed-off-by: Nicolas.Adenis-Lamarre <nicolas.adenis.lamarre@gmail.com>
(Original commits by Nicolas, adapted to v4.18 by David)
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/hid/hid-wiimote.h b/drivers/hid/hid-wiimote.h
index 510ca77fe14e..3bf3d3cc1c38 100644
--- a/drivers/hid/hid-wiimote.h
+++ b/drivers/hid/hid-wiimote.h
@@ -89,6 +89,8 @@ enum wiimote_exttype {
 	WIIMOTE_EXT_CLASSIC_CONTROLLER,
 	WIIMOTE_EXT_BALANCE_BOARD,
 	WIIMOTE_EXT_PRO_CONTROLLER,
+	WIIMOTE_EXT_DRUMS,
+	WIIMOTE_EXT_GUITAR,
 	WIIMOTE_EXT_NUM,
 };
 
@@ -137,6 +139,7 @@ struct wiimote_state {
 	/* calibration/cache data */
 	__u16 calib_bboard[4][3];
 	__s16 calib_pro_sticks[4];
+	__u8 pressure_drums[7];
 	__u8 cache_rumble;
 };