hid-tmff2/src/hid-tmff2.c, branch masterACTIVE - Linux driver for Thrustmaster wheelshttps://metanimi.dy.fi/cgit/hid-tmff2/atom?h=master2026-08-18T18:41:17Zadd module description2026-08-18T18:41:17ZKimplulkimi.h.kuparinen@gmail.com2026-08-18T18:26:51Zurn:sha1:456ec7d66d58ee41377022f44618a9b40838f5f9remove generic input filtering from wheel and pedal axes2026-08-08T22:20:24ZKai Krakowkai@kaishome.de2026-08-08T11:04:36Zurn:sha1:4c142e19d14d02d0149198274b0f3f11091c71c6
+ HID derives fuzz and flat from the logical axis range. On the tested T300
this gives steering fuzz=255 and flat=4095. It filters small corrections
and adds a large centered deadzone before applications apply their own
steering model.
+ Flat is also centered for pedal axes, while their rest position is an
endpoint. Fuzz without an endpoint deadzone can retain a small nonzero
value after the hardware has returned to rest. Both behaviours are
inappropriate for wheel and pedal input, and applications already provide
the required steering and endpoint deadzones.
+ Override fuzz and flat for every available wheel and pedal axis in
input_configured on devices handled by hid-tmff2, following the existing
hid-universal-pidff precedent for high-resolution racing devices. Skip
absent axes through the input device's absbit mask.
avoid signed overflow when scaling gain2026-08-08T22:20:08ZKai Krakowkai@kaishome.de2026-08-08T10:27:06Zurn:sha1:465ce84d2997e5af6630b88d88b63509d5a88031
+ FF_GAIN and the driver gain both use the full 16-bit range. Their product
can exceed INT_MAX. Signed overflow is undefined and happens for common
settings such as 75 percent times 75 percent. Use a u32 intermediate for
the scaling operation.
+ Pass the configured gain directly when initializing or updating the
hardware. This also removes two redundant multiply-divide expressions
which could overflow before cancelling out.
use an unsigned 16-bit type for gain2026-08-08T22:20:00ZKai Krakowkai@kaishome.de2026-08-08T20:36:04Zurn:sha1:f014217288927246f92ee876afbbf9de8ba707be
+ Gain is documented and sent to the hardware as a value in the range 0 to
65535, but the module parameter and sysfs attribute accept wider integer
values. Store gain as a u16 and parse sysfs writes with kstrtou16 so
out-of-range values are rejected instead of being silently changed.
+ This constrains only the configured value. Calculations combining gain
values still require a wider intermediate to cover the product of two
full-range 16-bit values.
Revert "use on_hid_hw_open instead of input_dev->open"2026-01-26T16:21:43ZKimplulkimi.h.kuparinen@gmail.com2026-01-26T16:21:43Zurn:sha1:66e522e26549afab26d032e900ae9f6576c83b9d
This reverts commit c26573d77369c042dc2b9a881a7f2ff88ddc0dd9.
+ `on_hid_hw_open` is apparently new enough that common distros don't
have it yet, so let's wait a few years and try again. The old method
works well enough and if not, just set `open_mode=0`.
use on_hid_hw_open instead of input_dev->open2026-01-04T19:49:58ZKimplulkimi.h.kuparinen@gmail.com2026-01-04T19:49:58Zurn:sha1:c26573d77369c042dc2b9a881a7f2ff88ddc0dd9
+ Seems some applications can mess with input_dev->open, still unclear
how but on_hid_hw_open seems to be a bit more reliable so use it for
now at least
apply initial tspc patches2025-11-23T12:37:44ZKimplulkimi.h.kuparinen@gmail.com2024-09-29T14:14:10Zurn:sha1:f1b2b85a4920d8c78b5b2b51b8cf5ddb1e8e03fd
+ Courtesy of @BDave95
minimize critical section in work handler2025-11-03T18:17:32ZKimplulkimi.h.kuparinen@gmail.com2025-11-03T18:17:32Zurn:sha1:5095d47320c36e2346d41eb7e35dcbd215886557
+ Effects handlers were being called in a locked context,
which in this case happened to work due to how `hid_hw_request`
is implemented. Now, only the selected state is updated and the heavy
lifting of making the wheel aware of the requested changes is done
after the critical section.
irqsave/irqrestore spinlocks2025-01-26T18:52:52ZKimplulkimi.h.kuparinen@gmail.com2025-01-26T18:52:52Zurn:sha1:a3e70e77d95c12e3fe11e0a7ccb67e7195e0e1abfix report_fixup() on linux 6.122024-11-23T23:24:21ZMmAaXx500viktor.balogh45@gmail.com2024-11-23T23:24:21Zurn:sha1:f5b2d53fe908a847d8000d7831d411cf68731fca
"HID: change return type of report_fixup() to const" fe73965