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authorSimon Wood <simon@mungewell.org>2013-11-06 12:30:42 -0700
committerJiri Kosina <jkosina@suse.cz>2013-11-08 14:12:08 +0100
commit56930e7ab86f9f453399cfaa4d78525c1e028a8f (patch)
tree812767ac0fc81dbb71499e29f981be377eed8b06 /drivers/hid
parentd2c02da549b468bbb28e67d269bd3c9e10683ff5 (diff)
downloadop-kernel-dev-56930e7ab86f9f453399cfaa4d78525c1e028a8f.zip
op-kernel-dev-56930e7ab86f9f453399cfaa4d78525c1e028a8f.tar.gz
HID:hid-lg4ff: ensure ConstantForce is disabled when set to 0
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>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/hid-lg4ff.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index 49f6cc0..5d140b7 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -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;
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