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HID:hid-lg4ff: ensure ConstantForce is disabled when set to 0

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When 'Constant Force' is set to 0 it is not turned off completely,
the wheel feels 'heavy'. This patch issues the '13 00..' command
to ensure that the force in slot 1 (the Constant Force) is
deactivated.

Reported-by: Elias Vanderstuyft <elias.vds@gmail.com>
Signed-off-by: Simon Wood <simon@mungewell.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Simon Wood 2013-11-06 12:30:42 -07:00 committed by Jiri Kosina
parent d2c02da549
commit 56930e7ab8
1 changed files with 15 additions and 0 deletions
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15
drivers/hid/hid-lg4ff.c
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@ -196,6 +196,21 @@ static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *e
case FF_CONSTANT:
x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
CLAMP(x);
if (x == 0x80) {
/* De-activate force in slot-1*/
value[0] = 0x13;
value[1] = 0x00;
value[2] = 0x00;
value[3] = 0x00;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
return 0;
}
value[0] = 0x11; /* Slot 1 */
value[1] = 0x08;
value[2] = x;