This is a note to let you know that I've just added the patch titled
HID:hid-lg4ff: Scale autocentering force properly on Logitech wheel
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
hid-hid-lg4ff-scale-autocentering-force-properly-on-logitech-wheel.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f8c231569a7a455dfa1907294a46ba52b3aa8859 Mon Sep 17 00:00:00 2001
From: Simon Wood <simon@xxxxxxxxxxxxx>
Date: Wed, 6 Nov 2013 12:30:40 -0700
Subject: HID:hid-lg4ff: Scale autocentering force properly on Logitech wheel
From: Simon Wood <simon@xxxxxxxxxxxxx>
commit f8c231569a7a455dfa1907294a46ba52b3aa8859 upstream.
Adjust the scaling and lineartity to match that of the Windows
driver (from MOMO testing).
Reported-by: Elias Vanderstuyft <elias.vds@xxxxxxxxx>
Signed-off-by: Simon Wood <simon@xxxxxxxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hid/hid-lg4ff.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -218,12 +218,21 @@ static void hid_lg4ff_set_autocenter_def
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
__s32 *value = report->field[0]->value;
+ __u32 expand_a, expand_b;
+
+ if (magnitude <= 0xaaaa) {
+ expand_a = 0x0c * magnitude;
+ expand_b = 0x80 * magnitude;
+ } else {
+ expand_a = (0x0c * 0xaaaa) + 0x06 * (magnitude - 0xaaaa);
+ expand_b = (0x80 * 0xaaaa) + 0xff * (magnitude - 0xaaaa);
+ }
value[0] = 0xfe;
value[1] = 0x0d;
- value[2] = magnitude >> 13;
- value[3] = magnitude >> 13;
- value[4] = magnitude >> 8;
+ value[2] = expand_a / 0xaaaa;
+ value[3] = expand_a / 0xaaaa;
+ value[4] = expand_b / 0xaaaa;
value[5] = 0x00;
value[6] = 0x00;
Patches currently in stable-queue which might be from simon@xxxxxxxxxxxxx are
queue-3.12/hid-hid-lg4ff-scale-autocentering-force-properly-on-logitech-wheel.patch
queue-3.12/hid-hid-lg4ff-initialize-device-properties-before-we-touch-autocentering.patch
queue-3.12/hid-hid-lg4ff-switch-autocentering-off-when-strength-is-set-to-zero.patch
queue-3.12/hid-lg-fix-reportdescriptor-for-logitech-formula-vibration.patch
queue-3.12/hid-logitech-lg2ff-add-ids-for-formula-vibration-feedback-wheel.patch
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