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HID:hid-lg4ff: Switch autocentering off when strength is set to zero. 

When the autocenter is set to zero, this patch issues a command to
totally disable the autocenter - this results in less resistance
in the wheel.

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 12:30:41 -07:00 committed by Jiri Kosina
parent f8c231569a
commit d2c02da549
1 changed files with 25 additions and 0 deletions
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25
drivers/hid/hid-lg4ff.c
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@ -220,6 +220,20 @@ static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitud
__s32 *value = report->field[0]->value;
__u32 expand_a, expand_b;
/* De-activate Auto-Center */
if (magnitude == 0) {
value[0] = 0xf5;
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;
}
if (magnitude <= 0xaaaa) {
expand_a = 0x0c * magnitude;
expand_b = 0x80 * magnitude;
@ -237,6 +251,17 @@ static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitud
value[6] = 0x00;
hid_hw_request(hid, report, HID_REQ_SET_REPORT);
/* Activate Auto-Center */
value[0] = 0x14;
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);
}
/* Sends autocentering command compatible with Formula Force EX */