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authorSimon Wood <simon@mungewell.org>2013-11-06 12:30:41 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-12-04 11:06:22 -0800
commit0c42663de5315d34e3f393b0ac4c9c720305d37d (patch)
treeccd07884a87fa458d51ad128c1d6ee624bda5b8f
parent2d7eff05cb9efcf54cb6b2edd057ca6cd2e87796 (diff)
HID:hid-lg4ff: Switch autocentering off when strength is set to zero.
commit d2c02da549b468bbb28e67d269bd3c9e10683ff5 upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/hid/hid-lg4ff.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index 530fcd19e90e..49f6cc0f9919 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -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 */