From 08072dde333c2f09114a01b0bd32be52ecce195b Mon Sep 17 00:00:00 2001 From: David Herrmann Date: Mon, 28 Oct 2013 17:49:20 +0100 Subject: HID: wiimote: add pro-controller analog stick calibration The analog sticks of the pro-controller might report slightly off values. To guarantee a uniform setup, we now calibrate analog-stick values during pro-controller setup. Unfortunately, the pro-controller fails during normal EEPROM reads and I couldn't figure out whether there are any calibration values stored on the device. Therefore, we now use the first values reported by the device (iff they are not _way_ off, which would indicate movement) to initialize the calibration values. To allow users to change this calibration data, we provide a pro_calib sysfs attribute. We also change the "flat" values so user-space correctly smoothes our data. It makes slightly off zero-positions less visible while still guaranteeing highly precise movement reports. Note that the pro controller reports zero-positions in a quite huge range (at least: -100 to +100). Reported-by: Rafael Brune Tested-by: Rafael Brune Signed-off-by: David Herrmann Signed-off-by: Jiri Kosina --- drivers/hid/hid-wiimote.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/hid/hid-wiimote.h') diff --git a/drivers/hid/hid-wiimote.h b/drivers/hid/hid-wiimote.h index 75db0c4..03065f1 100644 --- a/drivers/hid/hid-wiimote.h +++ b/drivers/hid/hid-wiimote.h @@ -46,6 +46,7 @@ #define WIIPROTO_FLAG_DRM_LOCKED 0x8000 #define WIIPROTO_FLAG_BUILTIN_MP 0x010000 #define WIIPROTO_FLAG_NO_MP 0x020000 +#define WIIPROTO_FLAG_PRO_CALIB_DONE 0x040000 #define WIIPROTO_FLAGS_LEDS (WIIPROTO_FLAG_LED1 | WIIPROTO_FLAG_LED2 | \ WIIPROTO_FLAG_LED3 | WIIPROTO_FLAG_LED4) @@ -135,6 +136,7 @@ struct wiimote_state { /* calibration/cache data */ __u16 calib_bboard[4][3]; + __s16 calib_pro_sticks[4]; __u8 cache_rumble; }; -- cgit v1.1