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version = "0.8.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "4b18820d944b33caa75a71378964ac46f58517c92b6ae5f762636247c09e78fb"
|
||||
dependencies = [
|
||||
"base64",
|
||||
"blake2b_simd",
|
||||
"constant_time_eq",
|
||||
"crossbeam-utils",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "rustversion"
|
||||
version = "1.0.22"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "b39cdef0fa800fc44525c84ccb54a029961a8215f9619753635a9c0d2538d46d"
|
||||
|
||||
[[package]]
|
||||
name = "shlex"
|
||||
version = "2.0.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f8fadd59c855ef2080decdef8ff161eb6661b86933c9d82e5ba29dc602a55aba"
|
||||
|
||||
[[package]]
|
||||
name = "slab"
|
||||
version = "0.4.12"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0c790de23124f9ab44544d7ac05d60440adc586479ce501c1d6d7da3cd8c9cf5"
|
||||
|
||||
[[package]]
|
||||
name = "strum"
|
||||
version = "0.8.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "4ca6e4730f517e041e547ffe23d29daab8de6b73af4b6ae2a002108169f5e7da"
|
||||
|
||||
[[package]]
|
||||
name = "strum_macros"
|
||||
version = "0.8.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "3384590878eb0cab3b128e844412e2d010821e7e091211b9d87324173ada7db8"
|
||||
dependencies = [
|
||||
"quote 0.3.15",
|
||||
"syn 0.11.11",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "surface-dial-renewed"
|
||||
version = "0.1.0"
|
||||
dependencies = [
|
||||
"evdev-rs",
|
||||
"hidapi",
|
||||
"notify-rust",
|
||||
"udev",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "syn"
|
||||
version = "0.11.11"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
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|
||||
dependencies = [
|
||||
"quote 0.3.15",
|
||||
"synom",
|
||||
"unicode-xid",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "syn"
|
||||
version = "2.0.118"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "1b9ae57f904213ebb649ce6895b8a66c66f0203b9319718f69a5612a065b1422"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote 1.0.46",
|
||||
"unicode-ident",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "synom"
|
||||
version = "0.11.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "a393066ed9010ebaed60b9eafa373d4b1baac186dd7e008555b0f702b51945b6"
|
||||
dependencies = [
|
||||
"unicode-xid",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "udev"
|
||||
version = "0.5.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "048df778e99eea028c08cca7853b9b521df6948b59bb29ab8bb737c057f58e6d"
|
||||
dependencies = [
|
||||
"libc",
|
||||
"libudev-sys",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "unicode-ident"
|
||||
version = "1.0.24"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
|
||||
|
||||
[[package]]
|
||||
name = "unicode-xid"
|
||||
version = "0.0.4"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8c1f860d7d29cf02cb2f3f359fd35991af3d30bac52c57d265a3c461074cb4dc"
|
||||
|
||||
[[package]]
|
||||
name = "wasi"
|
||||
version = "0.9.0+wasi-snapshot-preview1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen"
|
||||
version = "0.2.126"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "4b067c0c11094aef6b7a801c1e34a26affafdf3d051dba08456b868789aaf9a4"
|
||||
dependencies = [
|
||||
"cfg-if",
|
||||
"once_cell",
|
||||
"rustversion",
|
||||
"wasm-bindgen-macro",
|
||||
"wasm-bindgen-shared",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen-macro"
|
||||
version = "0.2.126"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "167ce5e579f6bcf889c4f7175a8a5a585de84e8ff93976ce393efa5f2837aab1"
|
||||
dependencies = [
|
||||
"quote 1.0.46",
|
||||
"wasm-bindgen-macro-support",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen-macro-support"
|
||||
version = "0.2.126"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f3997c7839262f4ef12cf90b818d6340c18e80f263f1a94bf157d0ec4420380e"
|
||||
dependencies = [
|
||||
"bumpalo",
|
||||
"proc-macro2",
|
||||
"quote 1.0.46",
|
||||
"syn 2.0.118",
|
||||
"wasm-bindgen-shared",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen-shared"
|
||||
version = "0.2.126"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "dc1b4cb0cc549fcf58d7dfc081778139b3d283a081644e833e84682ad71cea24"
|
||||
dependencies = [
|
||||
"unicode-ident",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winapi"
|
||||
version = "0.3.9"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
|
||||
dependencies = [
|
||||
"winapi-i686-pc-windows-gnu",
|
||||
"winapi-x86_64-pc-windows-gnu",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winapi-i686-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||
|
||||
[[package]]
|
||||
name = "winapi-x86_64-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
|
||||
[[package]]
|
||||
name = "windows-core"
|
||||
version = "0.61.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "c0fdd3ddb90610c7638aa2b3a3ab2904fb9e5cdbecc643ddb3647212781c4ae3"
|
||||
dependencies = [
|
||||
"windows-implement",
|
||||
"windows-interface",
|
||||
"windows-link 0.1.3",
|
||||
"windows-result",
|
||||
"windows-strings",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows-implement"
|
||||
version = "0.60.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "053e2e040ab57b9dc951b72c264860db7eb3b0200ba345b4e4c3b14f67855ddf"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote 1.0.46",
|
||||
"syn 2.0.118",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows-interface"
|
||||
version = "0.59.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "3f316c4a2570ba26bbec722032c4099d8c8bc095efccdc15688708623367e358"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote 1.0.46",
|
||||
"syn 2.0.118",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows-link"
|
||||
version = "0.1.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5e6ad25900d524eaabdbbb96d20b4311e1e7ae1699af4fb28c17ae66c80d798a"
|
||||
|
||||
[[package]]
|
||||
name = "windows-link"
|
||||
version = "0.2.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
|
||||
|
||||
[[package]]
|
||||
name = "windows-result"
|
||||
version = "0.3.4"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "56f42bd332cc6c8eac5af113fc0c1fd6a8fd2aa08a0119358686e5160d0586c6"
|
||||
dependencies = [
|
||||
"windows-link 0.1.3",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows-strings"
|
||||
version = "0.4.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "56e6c93f3a0c3b36176cb1327a4958a0353d5d166c2a35cb268ace15e91d3b57"
|
||||
dependencies = [
|
||||
"windows-link 0.1.3",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winrt"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "7e30cba82e22b083dc5a422c2ee77e20dc7927271a0dc981360c57c1453cb48d"
|
||||
dependencies = [
|
||||
"winapi",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winrt-notification"
|
||||
version = "0.2.4"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "57790eb281688a4682dab44df2a1ba8b78373233bd71cb291c3e75fecb1a01c4"
|
||||
dependencies = [
|
||||
"strum",
|
||||
"strum_macros",
|
||||
"winapi",
|
||||
"winrt",
|
||||
"xml-rs",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "xml-rs"
|
||||
version = "0.6.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "e1945e12e16b951721d7976520b0832496ef79c31602c7a29d950de79ba74621"
|
||||
dependencies = [
|
||||
"bitflags 0.9.1",
|
||||
]
|
||||
+13
@@ -0,0 +1,13 @@
|
||||
[package]
|
||||
name = "surface-dial-renewed"
|
||||
version = "0.1.0"
|
||||
edition = "2021"
|
||||
|
||||
[dependencies]
|
||||
evdev-rs = { git = "https://github.com/ndesh26/evdev-rs.git", rev = "8e995b8bf" }
|
||||
hidapi = { version = "1.2.3", default-features = false, features = ["linux-shared-hidraw"] }
|
||||
notify-rust = "=4.0.0"
|
||||
udev = "0.5"
|
||||
|
||||
[profile.release.package.evdev-rs]
|
||||
opt-level = 0
|
||||
@@ -0,0 +1,42 @@
|
||||
# Surface Dial Renewed Driver
|
||||
|
||||
This is a concept rewrite of the Surface Dial userspace driver. It is kept
|
||||
separate from the existing daemon so the new event model can be tested without
|
||||
touching the current code.
|
||||
|
||||
## Goals
|
||||
|
||||
- Multitouch scrolling first.
|
||||
- Regular wheel scrolling as a fallback mode.
|
||||
- Dial sensitivity adjustment by holding the button and rotating.
|
||||
- Desktop notification feedback for sensitivity changes.
|
||||
- Small, explicit state machines instead of mode/thread sprawl.
|
||||
|
||||
## Run
|
||||
|
||||
```bash
|
||||
cargo run --manifest-path renewed_driver/Cargo.toml -- --mode multitouch
|
||||
```
|
||||
|
||||
Regular wheel mode:
|
||||
|
||||
```bash
|
||||
cargo run --manifest-path renewed_driver/Cargo.toml -- --mode wheel
|
||||
```
|
||||
|
||||
The process still needs access to the Surface Dial event device and
|
||||
`/dev/uinput`, just like the original daemon.
|
||||
|
||||
## Controls
|
||||
|
||||
- Rotate: scroll.
|
||||
- Hold and rotate: change sensitivity.
|
||||
- Release after changing sensitivity: resume scroll mode.
|
||||
|
||||
Sensitivity levels are 1 through 32. KDE displays the current value through the
|
||||
native OSD text path, with desktop notifications used only as a fallback.
|
||||
|
||||
## Documentation
|
||||
|
||||
Detailed architecture, behavior, protocol, install, and troubleshooting notes
|
||||
live under [`doc/`](doc/README.md).
|
||||
@@ -0,0 +1,13 @@
|
||||
# Renewed Driver Documentation
|
||||
|
||||
This folder documents the current concept driver implementation.
|
||||
|
||||
- [Architecture](architecture.md): process layout, module responsibilities, and data flow.
|
||||
- [Behavior](behavior.md): user-visible controls, scrolling model, sensitivity, haptics, and OSD.
|
||||
- [Input and Output Protocol](input-output.md): Surface Dial event decoding and virtual uinput devices.
|
||||
- [Installation and Service](installation-service.md): install files, udev rules, systemd user service, and logs.
|
||||
- [Troubleshooting](troubleshooting.md): raw event inspection and common failure modes.
|
||||
|
||||
The driver intentionally stays small. The main design choice is to keep the
|
||||
event loop explicit and avoid the configurable mode framework from the older
|
||||
daemon until there is a concrete need for it.
|
||||
@@ -0,0 +1,86 @@
|
||||
# Architecture
|
||||
|
||||
`surface-dial-renewed` is a userspace Linux driver. It reads the Microsoft
|
||||
Surface Dial through evdev, emits virtual input devices through uinput, uses HID
|
||||
for haptic feedback, and uses KDE's OSD service for sensitivity feedback.
|
||||
|
||||
## Runtime Threads
|
||||
|
||||
The process has one main event loop and one input worker thread.
|
||||
|
||||
The input worker is created by `DialReader::spawn` in `src/dial.rs`. It finds
|
||||
the `Surface Dial System Multi Axis` event node through udev, blocks on evdev
|
||||
events, and sends simplified raw events through a channel.
|
||||
|
||||
The main thread owns all output state:
|
||||
|
||||
- `DriverState` in `src/main.rs`
|
||||
- `VirtualInput` in `src/virtual_input.rs`
|
||||
- `Haptics` in `src/haptics.rs`
|
||||
- `SensitivityNotifier` in `src/notify.rs`
|
||||
|
||||
Keeping output ownership on one thread avoids locking around uinput devices and
|
||||
keeps gesture lifecycle decisions local to the main loop.
|
||||
|
||||
## Module Responsibilities
|
||||
|
||||
`src/main.rs`
|
||||
|
||||
The state machine. It decides whether a Dial rotation means scroll or
|
||||
sensitivity adjustment. It starts and ends multitouch gestures, updates
|
||||
sensitivity, and calls haptics/OSD hooks.
|
||||
|
||||
`src/dial.rs`
|
||||
|
||||
Device discovery and event decoding. It converts evdev events into
|
||||
`DialEventKind` values: connect, disconnect, button press/release, long press,
|
||||
rotation, and ignored noise.
|
||||
|
||||
`src/virtual_input.rs`
|
||||
|
||||
Creates two uinput devices:
|
||||
|
||||
- `Surface Dial Renewed Touchpad` for multitouch scrolling.
|
||||
- `Surface Dial Renewed Wheel` for regular wheel mode.
|
||||
|
||||
The touchpad device is intentionally not advertised as a buttonpad and does not
|
||||
expose `BTN_LEFT`, reducing the chance that very short gestures become tap or
|
||||
right-click behavior.
|
||||
|
||||
`src/sensitivity.rs`
|
||||
|
||||
Defines the 1-32 sensitivity scale and maps each level to scroll scaling.
|
||||
|
||||
`src/haptics.rs`
|
||||
|
||||
Opens the Dial's HID device and sends manual haptic buzz reports. Haptics are
|
||||
best-effort; failure disables haptics but does not stop scrolling.
|
||||
|
||||
`src/notify.rs`
|
||||
|
||||
Shows the sensitivity value. KDE uses `qdbus6` with
|
||||
`org.kde.osdService.showText`. If that fails, the code falls back to
|
||||
FreeDesktop notifications.
|
||||
|
||||
`src/error.rs`
|
||||
|
||||
Small shared error enum for the concept driver.
|
||||
|
||||
## Data Flow
|
||||
|
||||
1. `DialReader` finds `Surface Dial System Multi Axis`.
|
||||
2. Raw evdev events are sent to the main loop.
|
||||
3. `main.rs` decodes intent:
|
||||
- button held + rotate: sensitivity adjustment
|
||||
- rotate alone: scrolling
|
||||
- connect/disconnect: haptics and gesture cleanup
|
||||
4. `VirtualInput` emits either multitouch or wheel events.
|
||||
5. `Haptics` buzzes on selector entry and sensitivity level changes.
|
||||
6. `SensitivityNotifier` displays `Surface Dial sensitivity N/32`.
|
||||
|
||||
## Reconnect Model
|
||||
|
||||
The input worker scans for an existing Dial at startup. If the device is removed
|
||||
or an input read fails, it sends a disconnect event, sleeps briefly, and retries
|
||||
discovery/monitoring. The main loop ends any active multitouch gesture and drops
|
||||
the HID haptics handle on disconnect. On reconnect it reopens haptics.
|
||||
@@ -0,0 +1,85 @@
|
||||
# Driver Behavior
|
||||
|
||||
## Default Mode
|
||||
|
||||
The default mode is multitouch scrolling. Run explicitly with:
|
||||
|
||||
```bash
|
||||
surface-dial-renewed --mode multitouch
|
||||
```
|
||||
|
||||
Regular wheel mode exists for fallback/testing:
|
||||
|
||||
```bash
|
||||
surface-dial-renewed --mode wheel
|
||||
```
|
||||
|
||||
## Normal Rotation
|
||||
|
||||
Normal Dial rotation emits a synthetic two-finger touchpad scroll through
|
||||
`Surface Dial Renewed Touchpad`.
|
||||
|
||||
The driver starts a virtual two-finger contact on the first rotation event,
|
||||
moves both virtual fingers vertically, and ends the touch gesture after no
|
||||
rotation has arrived for 2 seconds.
|
||||
|
||||
The 2 second hold is intentional. Very slow physical Dial movement can emit
|
||||
sparse `REL_DIAL` events. If the virtual fingers are lifted too quickly, libinput
|
||||
can treat those sparse movements as many tiny gestures and ignore them. Holding
|
||||
the contact makes slow and precise movement accumulate into one gesture.
|
||||
|
||||
## Sensitivity Selector
|
||||
|
||||
Hold the Dial down and rotate to change sensitivity.
|
||||
|
||||
- Range: `1/32` through `32/32`
|
||||
- Default: `7/32`
|
||||
- Step threshold: `48` raw Dial units per sensitivity level
|
||||
- Display: KDE OSD text, falling back to notification
|
||||
- Haptics: one buzz when entering the selector, one buzz per accepted level
|
||||
|
||||
While the button is held, rotation never scrolls. If a multitouch scroll gesture
|
||||
is active when the button is pressed, it is ended before sensitivity adjustment.
|
||||
|
||||
## Sensitivity Scaling
|
||||
|
||||
The sensitivity level maps to milli-pixels per raw Dial unit:
|
||||
|
||||
```text
|
||||
500 + (level - 1) * 250
|
||||
```
|
||||
|
||||
This means level 1 is `0.5` virtual coordinate units per raw Dial unit, level 7
|
||||
is `2.0`, and level 32 is `8.25`.
|
||||
|
||||
The driver stores fractional remainders while a gesture is active. A nonzero raw
|
||||
Dial event is rounded away from zero if it would otherwise produce no integer
|
||||
coordinate movement.
|
||||
|
||||
## Haptics
|
||||
|
||||
Haptics are deliberately limited:
|
||||
|
||||
- Enter sensitivity selector: buzz once.
|
||||
- Change sensitivity level: buzz once.
|
||||
|
||||
Normal scrolling does not buzz. It was tested and removed because it was
|
||||
distracting and hard to align with physical rotation consistently.
|
||||
|
||||
## OSD
|
||||
|
||||
On KDE, the driver calls:
|
||||
|
||||
```text
|
||||
org.kde.plasmashell /org/kde/osdService org.kde.osdService.showText
|
||||
```
|
||||
|
||||
The displayed text is:
|
||||
|
||||
```text
|
||||
Surface Dial sensitivity N/32
|
||||
```
|
||||
|
||||
KDE exposes polished volume/brightness OSD methods, but those are semantically
|
||||
volume/brightness-specific. The generic custom progress API is not callable as a
|
||||
normal method on this system, so the driver uses text OSD instead.
|
||||
@@ -0,0 +1,100 @@
|
||||
# Input and Output Protocol
|
||||
|
||||
## Physical Dial Input
|
||||
|
||||
The driver reads the `Surface Dial System Multi Axis` evdev device.
|
||||
|
||||
Find it with:
|
||||
|
||||
```bash
|
||||
rg -n -C 8 "Surface Dial System Multi Axis" /proc/bus/input/devices
|
||||
```
|
||||
|
||||
Then inspect raw data:
|
||||
|
||||
```bash
|
||||
sudo evtest /dev/input/eventXX
|
||||
```
|
||||
|
||||
Expected raw events:
|
||||
|
||||
```text
|
||||
EV_REL / REL_DIAL: rotation
|
||||
EV_KEY / BTN_0: button press and release
|
||||
EV_SYN and EV_MSC: ignored framing/scancode events
|
||||
```
|
||||
|
||||
The `Surface Dial System Control` node is not used for scrolling. It exposes
|
||||
sleep/wakeup-style keys, not rotation.
|
||||
|
||||
## Virtual Touchpad
|
||||
|
||||
The multitouch output device is named:
|
||||
|
||||
```text
|
||||
Surface Dial Renewed Touchpad
|
||||
```
|
||||
|
||||
It exposes a type-B multitouch touchpad with slots. On gesture start it creates
|
||||
two active tracking IDs. On movement it moves both slots along the Y axis and
|
||||
updates the single-touch compatibility `ABS_Y` value.
|
||||
|
||||
Important implementation details:
|
||||
|
||||
- Two fingers are used because libinput interprets that as scroll.
|
||||
- `INPUT_PROP_POINTER` is enabled.
|
||||
- `INPUT_PROP_BUTTONPAD` is intentionally not enabled.
|
||||
- `BTN_LEFT` is intentionally not exposed.
|
||||
- Pressure/touch-major/tool-width axes are exposed to look more like a real
|
||||
touchpad.
|
||||
|
||||
The lack of buttonpad/left-button capability reduces accidental tap/click
|
||||
interpretation when a scroll gesture is short.
|
||||
|
||||
## Gesture Lifecycle
|
||||
|
||||
`multitouch_start`
|
||||
|
||||
Creates slot 0 and slot 1 with tracking IDs, positions, pressure, touch major,
|
||||
and two-finger tool state.
|
||||
|
||||
`multitouch_move`
|
||||
|
||||
Moves both slots to the same new Y position. The driver keeps an accumulated
|
||||
`mt_position` relative to `MT_BASELINE`.
|
||||
|
||||
`multitouch_settle`
|
||||
|
||||
Emits one final stationary frame before ending. This reduces the chance that the
|
||||
final movement is interpreted as a flick.
|
||||
|
||||
`multitouch_end`
|
||||
|
||||
Sets both tracking IDs to `-1`, releases `BTN_TOUCH` and tool keys, and reports
|
||||
zero pressure.
|
||||
|
||||
## Coordinate Model
|
||||
|
||||
`MT_BASELINE` is `10_000`, with coordinates from `0` to `20_000`.
|
||||
|
||||
The driver recenters the synthetic gesture if `mt_position` exceeds
|
||||
`MT_RECENTER_THRESHOLD`. This avoids running into coordinate limits during long
|
||||
scrolls.
|
||||
|
||||
## Virtual Wheel
|
||||
|
||||
The fallback wheel device is named:
|
||||
|
||||
```text
|
||||
Surface Dial Renewed Wheel
|
||||
```
|
||||
|
||||
It emits both:
|
||||
|
||||
```text
|
||||
REL_WHEEL
|
||||
REL_WHEEL_HI_RES
|
||||
```
|
||||
|
||||
Wheel mode is implemented but has not received the same tuning as multitouch
|
||||
mode.
|
||||
@@ -0,0 +1,87 @@
|
||||
# Installation and Systemd Service
|
||||
|
||||
## Files
|
||||
|
||||
Install helpers:
|
||||
|
||||
```text
|
||||
renewed_driver/install.sh
|
||||
renewed_driver/uninstall.sh
|
||||
```
|
||||
|
||||
Systemd user service:
|
||||
|
||||
```text
|
||||
renewed_driver/install/surface-dial-renewed.service
|
||||
```
|
||||
|
||||
udev rules:
|
||||
|
||||
```text
|
||||
renewed_driver/install/70-surface-dial-renewed-uinput.rules
|
||||
renewed_driver/install/70-surface-dial-renewed-input.rules
|
||||
renewed_driver/install/70-surface-dial-renewed-hidraw.rules
|
||||
```
|
||||
|
||||
## Install
|
||||
|
||||
From the repository root:
|
||||
|
||||
```bash
|
||||
./renewed_driver/install.sh
|
||||
```
|
||||
|
||||
This performs:
|
||||
|
||||
1. `cargo install --path renewed_driver`
|
||||
2. udev rule installation under `/etc/udev/rules.d`
|
||||
3. udev reload and trigger
|
||||
4. systemd user service installation
|
||||
5. `systemctl --user enable --now surface-dial-renewed.service`
|
||||
|
||||
The service runs as the desktop user, not root. That is required for access to
|
||||
the user session D-Bus used by KDE OSD.
|
||||
|
||||
## Service
|
||||
|
||||
The service runs:
|
||||
|
||||
```text
|
||||
%h/.cargo/bin/surface-dial-renewed --mode multitouch
|
||||
```
|
||||
|
||||
It restarts on failure with a 2 second delay.
|
||||
|
||||
Useful commands:
|
||||
|
||||
```bash
|
||||
systemctl --user status surface-dial-renewed.service
|
||||
systemctl --user restart surface-dial-renewed.service
|
||||
journalctl --user -u surface-dial-renewed.service -f
|
||||
```
|
||||
|
||||
## Permissions
|
||||
|
||||
The udev rules grant user-session access to:
|
||||
|
||||
- `/dev/uinput`
|
||||
- Surface Dial input event nodes
|
||||
- Surface Dial HID raw node for haptics
|
||||
|
||||
If input permissions still fail, add the user to the group that owns
|
||||
`/dev/input/event*`, then log out and back in:
|
||||
|
||||
```bash
|
||||
sudo gpasswd -a "$(whoami)" "$(stat -c '%G' /dev/input/event0)"
|
||||
```
|
||||
|
||||
## Uninstall
|
||||
|
||||
From the repository root:
|
||||
|
||||
```bash
|
||||
./renewed_driver/uninstall.sh
|
||||
```
|
||||
|
||||
This disables the user service, removes service/rule files, reloads udev, and
|
||||
uninstalls the Cargo binary.
|
||||
@@ -0,0 +1,82 @@
|
||||
# Troubleshooting
|
||||
|
||||
## Check the Service
|
||||
|
||||
```bash
|
||||
systemctl --user status surface-dial-renewed.service
|
||||
journalctl --user -u surface-dial-renewed.service -n 100 --no-pager
|
||||
```
|
||||
|
||||
Expected startup lines:
|
||||
|
||||
```text
|
||||
surface-dial-renewed: running in Multitouch mode
|
||||
surface-dial-renewed: dial connected
|
||||
```
|
||||
|
||||
## Check Raw Dial Rotation
|
||||
|
||||
Find the current event node:
|
||||
|
||||
```bash
|
||||
rg -n -C 8 "Surface Dial System Multi Axis" /proc/bus/input/devices
|
||||
```
|
||||
|
||||
Then run:
|
||||
|
||||
```bash
|
||||
sudo evtest /dev/input/eventXX
|
||||
```
|
||||
|
||||
Rotation should produce:
|
||||
|
||||
```text
|
||||
type 2 (EV_REL), code 7 (REL_DIAL), value ...
|
||||
```
|
||||
|
||||
If `REL_DIAL` does not appear, the driver cannot scroll. Reconnect the Dial over
|
||||
Bluetooth and check again.
|
||||
|
||||
## Wrong Event Node
|
||||
|
||||
The Control node is not the rotation node. It looks like:
|
||||
|
||||
```text
|
||||
Surface Dial System Control
|
||||
```
|
||||
|
||||
and exposes `KEY_SLEEP`/`KEY_WAKEUP`. Use `Surface Dial System Multi Axis` for
|
||||
rotation.
|
||||
|
||||
## Haptics Work But Scroll Does Not
|
||||
|
||||
Haptics use HID raw access; scrolling uses evdev input plus uinput output.
|
||||
Haptics working only proves the HID path works.
|
||||
|
||||
Check:
|
||||
|
||||
1. Raw `REL_DIAL` events with `evtest`.
|
||||
2. Service logs for `dial connected`.
|
||||
3. `/dev/uinput` permissions.
|
||||
4. Whether `Surface Dial Renewed Touchpad` appears in `/proc/bus/input/devices`.
|
||||
|
||||
## Sensitivity OSD Warnings
|
||||
|
||||
The service may log messages from `qdbus6` about locale fallback, for example
|
||||
`Detected locale "C"`. The OSD still works. This is caused by the systemd user
|
||||
service environment lacking a UTF-8 locale variable.
|
||||
|
||||
If it becomes noisy, set locale environment for the user service or replace the
|
||||
shell-out OSD backend with a direct D-Bus implementation.
|
||||
|
||||
## Reconnect Oddities
|
||||
|
||||
After Bluetooth reconnects, event numbers can change. Always rediscover with:
|
||||
|
||||
```bash
|
||||
rg -n -C 8 "Surface Dial" /proc/bus/input/devices
|
||||
```
|
||||
|
||||
If button events appear but rotation does not, disconnect and reconnect the Dial
|
||||
again. The driver cannot synthesize rotation if the kernel is not emitting
|
||||
`REL_DIAL`.
|
||||
Executable
+24
@@ -0,0 +1,24 @@
|
||||
#!/usr/bin/env bash
|
||||
set -euo pipefail
|
||||
|
||||
repo_dir="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)"
|
||||
driver_dir="${repo_dir}/renewed_driver"
|
||||
|
||||
cargo install --path "${driver_dir}"
|
||||
|
||||
sudo install -Dm644 "${driver_dir}/install/70-surface-dial-renewed-uinput.rules" \
|
||||
/etc/udev/rules.d/70-surface-dial-renewed-uinput.rules
|
||||
sudo install -Dm644 "${driver_dir}/install/70-surface-dial-renewed-input.rules" \
|
||||
/etc/udev/rules.d/70-surface-dial-renewed-input.rules
|
||||
sudo install -Dm644 "${driver_dir}/install/70-surface-dial-renewed-hidraw.rules" \
|
||||
/etc/udev/rules.d/70-surface-dial-renewed-hidraw.rules
|
||||
sudo udevadm control --reload-rules
|
||||
sudo udevadm trigger
|
||||
|
||||
install -Dm644 "${driver_dir}/install/surface-dial-renewed.service" \
|
||||
"${HOME}/.config/systemd/user/surface-dial-renewed.service"
|
||||
|
||||
systemctl --user daemon-reload
|
||||
systemctl --user enable --now surface-dial-renewed.service
|
||||
|
||||
systemctl --user --no-pager status surface-dial-renewed.service
|
||||
@@ -0,0 +1 @@
|
||||
KERNEL=="hidraw*", SUBSYSTEM=="hidraw", ATTRS{idVendor}=="045e", ATTRS{idProduct}=="091b", TAG+="uaccess", TAG+="udev-acl"
|
||||
@@ -0,0 +1,2 @@
|
||||
KERNEL=="event*", SUBSYSTEM=="input", ATTRS{name}=="Surface Dial System Multi Axis", TAG+="uaccess", TAG+="udev-acl"
|
||||
KERNEL=="event*", SUBSYSTEM=="input", ATTRS{name}=="Surface Dial System Control", TAG+="uaccess", TAG+="udev-acl"
|
||||
@@ -0,0 +1 @@
|
||||
KERNEL=="uinput", SUBSYSTEM=="misc", OPTIONS+="static_node=uinput", TAG+="uaccess", TAG+="udev-acl"
|
||||
@@ -0,0 +1,77 @@
|
||||
# Installing `surface-dial-renewed`
|
||||
|
||||
These files install the renewed driver as a systemd user service. The service
|
||||
runs as your desktop user so it can access your session D-Bus for KDE OSD.
|
||||
|
||||
## Build and Install the Binary
|
||||
|
||||
Automatic install from the repository root:
|
||||
|
||||
```bash
|
||||
./renewed_driver/install.sh
|
||||
```
|
||||
|
||||
Manual install:
|
||||
|
||||
```bash
|
||||
cargo install --path renewed_driver
|
||||
```
|
||||
|
||||
This installs:
|
||||
|
||||
```text
|
||||
~/.cargo/bin/surface-dial-renewed
|
||||
```
|
||||
|
||||
## Install Device Permission Rules
|
||||
|
||||
```bash
|
||||
sudo cp renewed_driver/install/70-surface-dial-renewed-uinput.rules /etc/udev/rules.d/
|
||||
sudo cp renewed_driver/install/70-surface-dial-renewed-input.rules /etc/udev/rules.d/
|
||||
sudo cp renewed_driver/install/70-surface-dial-renewed-hidraw.rules /etc/udev/rules.d/
|
||||
sudo udevadm control --reload-rules
|
||||
sudo udevadm trigger
|
||||
```
|
||||
|
||||
If the service still cannot access input devices, add your user to the group
|
||||
that owns `/dev/input/event*` on your system, then log out and back in:
|
||||
|
||||
```bash
|
||||
sudo gpasswd -a "$(whoami)" "$(stat -c '%G' /dev/input/event0)"
|
||||
```
|
||||
|
||||
## Install the User Service
|
||||
|
||||
```bash
|
||||
mkdir -p ~/.config/systemd/user
|
||||
cp renewed_driver/install/surface-dial-renewed.service ~/.config/systemd/user/
|
||||
systemctl --user daemon-reload
|
||||
systemctl --user enable --now surface-dial-renewed.service
|
||||
```
|
||||
|
||||
## Check Status and Logs
|
||||
|
||||
```bash
|
||||
systemctl --user status surface-dial-renewed.service
|
||||
journalctl --user -u surface-dial-renewed.service -f
|
||||
```
|
||||
|
||||
## Uninstall
|
||||
|
||||
Automatic uninstall from the repository root:
|
||||
|
||||
```bash
|
||||
./renewed_driver/uninstall.sh
|
||||
```
|
||||
|
||||
Manual uninstall:
|
||||
|
||||
```bash
|
||||
systemctl --user disable --now surface-dial-renewed.service
|
||||
rm ~/.config/systemd/user/surface-dial-renewed.service
|
||||
sudo rm /etc/udev/rules.d/70-surface-dial-renewed-uinput.rules
|
||||
sudo rm /etc/udev/rules.d/70-surface-dial-renewed-input.rules
|
||||
sudo rm /etc/udev/rules.d/70-surface-dial-renewed-hidraw.rules
|
||||
systemctl --user daemon-reload
|
||||
sudo udevadm control --reload-rules
|
||||
```
|
||||
@@ -0,0 +1,15 @@
|
||||
[Unit]
|
||||
Description=Surface Dial Renewed Driver
|
||||
After=graphical-session.target
|
||||
PartOf=graphical-session.target
|
||||
|
||||
[Service]
|
||||
Type=simple
|
||||
ExecStart=%h/.cargo/bin/surface-dial-renewed --mode multitouch
|
||||
Restart=on-failure
|
||||
RestartSec=2
|
||||
StandardOutput=journal
|
||||
StandardError=journal
|
||||
|
||||
[Install]
|
||||
WantedBy=default.target
|
||||
+261
@@ -0,0 +1,261 @@
|
||||
use std::fs;
|
||||
use std::sync::mpsc;
|
||||
use std::time::{Duration, Instant};
|
||||
|
||||
use evdev_rs::enums::{EventCode, EventType, EV_KEY, EV_REL};
|
||||
use evdev_rs::{InputEvent, ReadFlag};
|
||||
|
||||
use crate::error::{Error, Result};
|
||||
|
||||
const MULTI_AXIS_NAME: &str = r#""Surface Dial System Multi Axis""#;
|
||||
|
||||
#[derive(Debug)]
|
||||
pub struct DialEvent {
|
||||
pub kind: DialEventKind,
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
pub enum DialEventKind {
|
||||
Connected,
|
||||
Disconnected,
|
||||
Ignored,
|
||||
ButtonPress,
|
||||
ButtonRelease,
|
||||
ButtonLongPress,
|
||||
Rotate(i32),
|
||||
}
|
||||
|
||||
enum RawDialEvent {
|
||||
Connected,
|
||||
Disconnected,
|
||||
Input(InputEvent),
|
||||
}
|
||||
|
||||
pub struct DialReader {
|
||||
rx: mpsc::Receiver<RawDialEvent>,
|
||||
long_press_timeout: Duration,
|
||||
// Long-press is not used by the current UX, but keeping the detection here
|
||||
// leaves room for a future mode/menu without complicating the main loop.
|
||||
long_press_deadline: Option<Instant>,
|
||||
}
|
||||
|
||||
impl DialReader {
|
||||
pub fn spawn(long_press_timeout: Duration) -> Result<Self> {
|
||||
let (tx, rx) = mpsc::channel();
|
||||
|
||||
std::thread::Builder::new()
|
||||
.name("dial-input".to_string())
|
||||
.spawn(move || {
|
||||
if let Err(err) = input_worker(tx) {
|
||||
eprintln!("surface-dial-renewed: input worker stopped: {err}");
|
||||
}
|
||||
})?;
|
||||
|
||||
Ok(Self {
|
||||
rx,
|
||||
long_press_timeout,
|
||||
long_press_deadline: None,
|
||||
})
|
||||
}
|
||||
|
||||
pub fn next_event(&mut self, idle_timeout: Option<Duration>) -> Result<Option<DialEvent>> {
|
||||
let timeout = self.next_timeout(idle_timeout);
|
||||
|
||||
let raw = match timeout {
|
||||
Some(timeout) => match self.rx.recv_timeout(timeout) {
|
||||
Ok(raw) => raw,
|
||||
Err(mpsc::RecvTimeoutError::Timeout) => {
|
||||
if self.long_press_due() {
|
||||
self.long_press_deadline = None;
|
||||
return Ok(Some(DialEvent {
|
||||
kind: DialEventKind::ButtonLongPress,
|
||||
}));
|
||||
}
|
||||
|
||||
return Ok(None);
|
||||
}
|
||||
Err(mpsc::RecvTimeoutError::Disconnected) => {
|
||||
return Err(Error::UnexpectedEvent(
|
||||
"input worker disconnected".to_string(),
|
||||
));
|
||||
}
|
||||
},
|
||||
None => self
|
||||
.rx
|
||||
.recv()
|
||||
.map_err(|_| Error::UnexpectedEvent("input worker disconnected".to_string()))?,
|
||||
};
|
||||
|
||||
let event = match raw {
|
||||
RawDialEvent::Connected => DialEvent {
|
||||
kind: DialEventKind::Connected,
|
||||
},
|
||||
RawDialEvent::Disconnected => DialEvent {
|
||||
kind: DialEventKind::Disconnected,
|
||||
},
|
||||
RawDialEvent::Input(input) => decode_input(input)?,
|
||||
};
|
||||
|
||||
match event.kind {
|
||||
DialEventKind::ButtonPress => {
|
||||
self.long_press_deadline = Some(Instant::now() + self.long_press_timeout);
|
||||
}
|
||||
DialEventKind::ButtonRelease | DialEventKind::Rotate(_) => {
|
||||
self.long_press_deadline = None;
|
||||
}
|
||||
_ => {}
|
||||
}
|
||||
|
||||
Ok(Some(event))
|
||||
}
|
||||
|
||||
fn next_timeout(&self, idle_timeout: Option<Duration>) -> Option<Duration> {
|
||||
let long_press_timeout = self
|
||||
.long_press_deadline
|
||||
.map(|deadline| deadline.saturating_duration_since(Instant::now()));
|
||||
|
||||
match (idle_timeout, long_press_timeout) {
|
||||
(Some(idle), Some(long_press)) => Some(idle.min(long_press)),
|
||||
(Some(idle), None) => Some(idle),
|
||||
(None, Some(long_press)) => Some(long_press),
|
||||
(None, None) => None,
|
||||
}
|
||||
}
|
||||
|
||||
fn long_press_due(&self) -> bool {
|
||||
self.long_press_deadline
|
||||
.is_some_and(|deadline| Instant::now() >= deadline)
|
||||
}
|
||||
}
|
||||
|
||||
fn input_worker(tx: mpsc::Sender<RawDialEvent>) -> std::io::Result<()> {
|
||||
loop {
|
||||
// First handle already-connected Dials. Bluetooth reconnects can create
|
||||
// new event node numbers, so each outer loop does a fresh udev scan.
|
||||
match find_existing_device() {
|
||||
Ok(Some(device)) => {
|
||||
if let Err(err) = read_device(device, &tx) {
|
||||
eprintln!("surface-dial-renewed: input read failed: {err}");
|
||||
let _ = tx.send(RawDialEvent::Disconnected);
|
||||
std::thread::sleep(Duration::from_millis(250));
|
||||
}
|
||||
continue;
|
||||
}
|
||||
Ok(None) => {}
|
||||
Err(err) => {
|
||||
eprintln!("surface-dial-renewed: input scan failed: {err}");
|
||||
std::thread::sleep(Duration::from_millis(250));
|
||||
}
|
||||
}
|
||||
|
||||
// If there is no current Dial, block on udev add events and immediately
|
||||
// read the first matching device. Errors are logged and retried so a
|
||||
// transient Bluetooth/udev issue does not kill the daemon.
|
||||
if let Err(err) = wait_for_added_device(&tx) {
|
||||
eprintln!("surface-dial-renewed: input monitor failed: {err}");
|
||||
std::thread::sleep(Duration::from_millis(250));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn find_existing_device() -> std::io::Result<Option<evdev_rs::Device>> {
|
||||
let mut enumerator = udev::Enumerator::new()?;
|
||||
enumerator.match_subsystem("input")?;
|
||||
|
||||
for device in enumerator.scan_devices()? {
|
||||
if let Some(device) = udev_to_evdev(&device)? {
|
||||
return Ok(Some(device));
|
||||
}
|
||||
}
|
||||
|
||||
Ok(None)
|
||||
}
|
||||
|
||||
fn wait_for_added_device(tx: &mpsc::Sender<RawDialEvent>) -> std::io::Result<()> {
|
||||
let mut socket = udev::MonitorBuilder::new()?
|
||||
.match_subsystem("input")?
|
||||
.listen()?;
|
||||
|
||||
loop {
|
||||
let Some(event) = socket.next() else {
|
||||
std::thread::sleep(Duration::from_millis(25));
|
||||
continue;
|
||||
};
|
||||
|
||||
if !matches!(event.event_type(), udev::EventType::Add) {
|
||||
continue;
|
||||
}
|
||||
|
||||
let Some(device) = udev_to_evdev(&event.device())? else {
|
||||
continue;
|
||||
};
|
||||
|
||||
read_device(device, tx)?;
|
||||
return Ok(());
|
||||
}
|
||||
}
|
||||
|
||||
fn udev_to_evdev(device: &udev::Device) -> std::io::Result<Option<evdev_rs::Device>> {
|
||||
let Some(devnode) = device.devnode() else {
|
||||
return Ok(None);
|
||||
};
|
||||
|
||||
let Some(parent) = device.parent() else {
|
||||
return Ok(None);
|
||||
};
|
||||
|
||||
// The /dev/input/eventXX node itself is a child. The readable device name
|
||||
// lives on its parent input device.
|
||||
let name = parent
|
||||
.property_value("NAME")
|
||||
.unwrap_or_else(|| std::ffi::OsStr::new(""))
|
||||
.to_string_lossy();
|
||||
|
||||
if name != MULTI_AXIS_NAME {
|
||||
return Ok(None);
|
||||
}
|
||||
|
||||
let file = fs::File::open(devnode)?;
|
||||
evdev_rs::Device::new_from_fd(file).map(Some)
|
||||
}
|
||||
|
||||
fn read_device(device: evdev_rs::Device, tx: &mpsc::Sender<RawDialEvent>) -> std::io::Result<()> {
|
||||
let _ = tx.send(RawDialEvent::Connected);
|
||||
|
||||
loop {
|
||||
match device.next_event(ReadFlag::BLOCKING) {
|
||||
Ok((_status, event)) => {
|
||||
let _ = tx.send(RawDialEvent::Input(event));
|
||||
}
|
||||
// ENODEV means the Bluetooth input device disappeared.
|
||||
Err(err) if err.raw_os_error() == Some(19) => break,
|
||||
Err(err) => return Err(err),
|
||||
}
|
||||
}
|
||||
|
||||
let _ = tx.send(RawDialEvent::Disconnected);
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn decode_input(input: InputEvent) -> Result<DialEvent> {
|
||||
// Keep the public event surface deliberately small: BTN_0 is the button,
|
||||
// REL_DIAL is rotation, SYN/MSC framing is noise for this driver.
|
||||
let kind = match input.event_type {
|
||||
EventType::EV_SYN | EventType::EV_MSC => DialEventKind::Ignored,
|
||||
EventType::EV_KEY => match input.event_code {
|
||||
EventCode::EV_KEY(EV_KEY::BTN_0) => match input.value {
|
||||
0 => DialEventKind::ButtonRelease,
|
||||
1 => DialEventKind::ButtonPress,
|
||||
_ => return Err(Error::UnexpectedEvent(format!("{input:?}"))),
|
||||
},
|
||||
_ => DialEventKind::Ignored,
|
||||
},
|
||||
EventType::EV_REL => match input.event_code {
|
||||
EventCode::EV_REL(EV_REL::REL_DIAL) => DialEventKind::Rotate(input.value),
|
||||
_ => DialEventKind::Ignored,
|
||||
},
|
||||
_ => DialEventKind::Ignored,
|
||||
};
|
||||
|
||||
Ok(DialEvent { kind })
|
||||
}
|
||||
@@ -0,0 +1,42 @@
|
||||
use std::fmt;
|
||||
|
||||
pub type Result<T> = std::result::Result<T, Error>;
|
||||
|
||||
#[derive(Debug)]
|
||||
pub enum Error {
|
||||
Io(std::io::Error),
|
||||
Hid(hidapi::HidError),
|
||||
Notify(notify_rust::error::Error),
|
||||
UnexpectedEvent(String),
|
||||
}
|
||||
|
||||
impl fmt::Display for Error {
|
||||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||||
match self {
|
||||
Error::Io(err) => write!(f, "{err}"),
|
||||
Error::Hid(err) => write!(f, "{err}"),
|
||||
Error::Notify(err) => write!(f, "{err}"),
|
||||
Error::UnexpectedEvent(event) => write!(f, "unexpected input event: {event}"),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl std::error::Error for Error {}
|
||||
|
||||
impl From<std::io::Error> for Error {
|
||||
fn from(err: std::io::Error) -> Self {
|
||||
Error::Io(err)
|
||||
}
|
||||
}
|
||||
|
||||
impl From<notify_rust::error::Error> for Error {
|
||||
fn from(err: notify_rust::error::Error) -> Self {
|
||||
Error::Notify(err)
|
||||
}
|
||||
}
|
||||
|
||||
impl From<hidapi::HidError> for Error {
|
||||
fn from(err: hidapi::HidError) -> Self {
|
||||
Error::Hid(err)
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,76 @@
|
||||
use hidapi::{HidApi, HidDevice};
|
||||
|
||||
const SURFACE_DIAL_VENDOR_ID: u16 = 0x045e;
|
||||
const SURFACE_DIAL_PRODUCT_ID: u16 = 0x091b;
|
||||
|
||||
pub struct Haptics {
|
||||
device: Option<DialHid>,
|
||||
}
|
||||
|
||||
impl Haptics {
|
||||
pub fn new() -> Self {
|
||||
Self { device: None }
|
||||
}
|
||||
|
||||
pub fn reconnect(&mut self) {
|
||||
// HID raw is separate from evdev. Treat it as optional: lack of hidraw
|
||||
// permission should not break scrolling.
|
||||
if self.device.is_some() {
|
||||
return;
|
||||
}
|
||||
|
||||
self.device = match DialHid::open() {
|
||||
Ok(device) => Some(device),
|
||||
Err(err) => {
|
||||
eprintln!("surface-dial-renewed: haptics unavailable: {err}");
|
||||
None
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
pub fn disconnect(&mut self) {
|
||||
self.device = None;
|
||||
}
|
||||
|
||||
pub fn buzz(&mut self, repeat: u8) {
|
||||
let Some(device) = &self.device else {
|
||||
return;
|
||||
};
|
||||
|
||||
// If the Bluetooth HID handle went stale, drop it. The next Dial
|
||||
// reconnect event will try to reopen haptics.
|
||||
if let Err(err) = device.buzz(repeat) {
|
||||
eprintln!("surface-dial-renewed: haptics failed: {err}");
|
||||
self.device = None;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
struct DialHid {
|
||||
// Keep HidApi alive for at least as long as HidDevice. Some hidapi backends
|
||||
// tie device lifetime to the owning API context.
|
||||
device: HidDevice,
|
||||
_api: HidApi,
|
||||
}
|
||||
|
||||
impl DialHid {
|
||||
fn open() -> Result<Self, hidapi::HidError> {
|
||||
let api = HidApi::new()?;
|
||||
let device = api.open(SURFACE_DIAL_VENDOR_ID, SURFACE_DIAL_PRODUCT_ID)?;
|
||||
Ok(Self { device, _api: api })
|
||||
}
|
||||
|
||||
fn buzz(&self, repeat: u8) -> Result<(), hidapi::HidError> {
|
||||
// Manual haptic trigger report, ported from the old driver. We only use
|
||||
// this for selector entry and level changes.
|
||||
let buf = [
|
||||
0x01, // Report ID
|
||||
repeat, // RepeatCount
|
||||
0x03, // ManualTrigger
|
||||
0x00, // RetriggerPeriod low byte
|
||||
0x00, // RetriggerPeriod high byte
|
||||
];
|
||||
self.device.write(&buf)?;
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
+275
@@ -0,0 +1,275 @@
|
||||
mod dial;
|
||||
mod error;
|
||||
mod haptics;
|
||||
mod notify;
|
||||
mod sensitivity;
|
||||
mod virtual_input;
|
||||
|
||||
use std::time::Duration;
|
||||
|
||||
use dial::{DialEvent, DialEventKind, DialReader};
|
||||
use error::Result;
|
||||
use haptics::Haptics;
|
||||
use notify::SensitivityNotifier;
|
||||
use sensitivity::Sensitivity;
|
||||
use virtual_input::{VirtualInput, WheelDirection};
|
||||
|
||||
const MULTITOUCH_IDLE_TIMEOUT: Duration = Duration::from_millis(2_000);
|
||||
const MULTITOUCH_SETTLE_TIMEOUT: Duration = Duration::from_millis(80);
|
||||
const SENSITIVITY_STEP_UNITS: i32 = 48;
|
||||
|
||||
#[derive(Debug, Clone, Copy, Eq, PartialEq)]
|
||||
enum OutputMode {
|
||||
Multitouch,
|
||||
Wheel,
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
struct DriverState {
|
||||
mode: OutputMode,
|
||||
sensitivity: Sensitivity,
|
||||
button_down: bool,
|
||||
adjusted_while_pressed: bool,
|
||||
sensitivity_accumulator: i32,
|
||||
// Active synthetic touchpad gesture state. These are kept in the main loop
|
||||
// so all uinput writes happen from one place and gesture cleanup is explicit.
|
||||
mt_active: bool,
|
||||
mt_position: i32,
|
||||
mt_remainder_milli: i32,
|
||||
}
|
||||
|
||||
impl DriverState {
|
||||
fn new(mode: OutputMode) -> Self {
|
||||
Self {
|
||||
mode,
|
||||
sensitivity: Sensitivity::default(),
|
||||
button_down: false,
|
||||
adjusted_while_pressed: false,
|
||||
sensitivity_accumulator: 0,
|
||||
mt_active: false,
|
||||
mt_position: 0,
|
||||
mt_remainder_milli: 0,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn main() {
|
||||
if let Err(err) = run() {
|
||||
eprintln!("surface-dial-renewed: {err}");
|
||||
std::process::exit(1);
|
||||
}
|
||||
}
|
||||
|
||||
fn run() -> Result<()> {
|
||||
let mode = parse_mode(std::env::args().skip(1));
|
||||
let mut state = DriverState::new(mode);
|
||||
// Input reading runs on a worker thread; output devices stay owned by the
|
||||
// main thread to avoid sharing uinput handles across threads.
|
||||
let mut dial = DialReader::spawn(Duration::from_millis(750))?;
|
||||
let mut output = VirtualInput::new()?;
|
||||
let mut notifier = SensitivityNotifier::new();
|
||||
let mut haptics = Haptics::new();
|
||||
|
||||
eprintln!("surface-dial-renewed: running in {mode:?} mode");
|
||||
|
||||
loop {
|
||||
// While a synthetic two-finger gesture is active, recv with a timeout.
|
||||
// Timeout means "the user stopped rotating", so the virtual fingers can
|
||||
// be lifted. The 2s delay is deliberate: very slow Dial movement emits
|
||||
// sparse REL_DIAL events, and libinput needs one continuous gesture to
|
||||
// recognize those as precise scroll movement.
|
||||
let timeout = if state.mt_active {
|
||||
Some(MULTITOUCH_IDLE_TIMEOUT)
|
||||
} else {
|
||||
None
|
||||
};
|
||||
|
||||
match dial.next_event(timeout)? {
|
||||
Some(event) => {
|
||||
handle_event(event, &mut state, &mut output, &mut notifier, &mut haptics)?
|
||||
}
|
||||
None => end_multitouch_if_active(&mut state, &mut output)?,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn handle_event(
|
||||
event: DialEvent,
|
||||
state: &mut DriverState,
|
||||
output: &mut VirtualInput,
|
||||
notifier: &mut SensitivityNotifier,
|
||||
haptics: &mut Haptics,
|
||||
) -> Result<()> {
|
||||
match event.kind {
|
||||
DialEventKind::Connected => {
|
||||
eprintln!("surface-dial-renewed: dial connected");
|
||||
// Haptics are tied to the HID raw device, not the evdev input node,
|
||||
// so reconnect them when the input side confirms the Dial is back.
|
||||
haptics.reconnect();
|
||||
}
|
||||
DialEventKind::Disconnected => {
|
||||
end_multitouch_if_active(state, output)?;
|
||||
haptics.disconnect();
|
||||
eprintln!("surface-dial-renewed: dial disconnected");
|
||||
}
|
||||
DialEventKind::ButtonPress => {
|
||||
// Holding the button turns rotation into sensitivity adjustment. The
|
||||
// buzz is the tactile "selector entered" cue.
|
||||
state.button_down = true;
|
||||
state.adjusted_while_pressed = false;
|
||||
state.sensitivity_accumulator = 0;
|
||||
haptics.buzz(1);
|
||||
}
|
||||
DialEventKind::ButtonRelease => {
|
||||
state.button_down = false;
|
||||
state.adjusted_while_pressed = false;
|
||||
state.sensitivity_accumulator = 0;
|
||||
}
|
||||
DialEventKind::ButtonLongPress => {
|
||||
// The concept driver reserves long-press for future mode switching.
|
||||
}
|
||||
DialEventKind::Rotate(delta) => {
|
||||
if state.button_down {
|
||||
// Never scroll while the sensitivity selector is active. End a
|
||||
// pending touchpad gesture before showing the selector so the
|
||||
// desktop does not see overlapping scroll and adjustment input.
|
||||
end_multitouch_if_active(state, output)?;
|
||||
adjust_sensitivity(delta, state, notifier, haptics)?;
|
||||
return Ok(());
|
||||
}
|
||||
|
||||
match state.mode {
|
||||
OutputMode::Multitouch => multitouch_scroll(delta, state, output)?,
|
||||
OutputMode::Wheel => wheel_scroll(delta, state, output)?,
|
||||
}
|
||||
}
|
||||
DialEventKind::Ignored => {}
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn adjust_sensitivity(
|
||||
delta: i32,
|
||||
state: &mut DriverState,
|
||||
notifier: &mut SensitivityNotifier,
|
||||
haptics: &mut Haptics,
|
||||
) -> Result<()> {
|
||||
// The Dial emits many REL_DIAL events per visible detent. Accumulating raw
|
||||
// units makes the 1-32 selector controllable instead of changing a level for
|
||||
// every tiny event.
|
||||
state.sensitivity_accumulator = state.sensitivity_accumulator.saturating_add(delta);
|
||||
|
||||
while state.sensitivity_accumulator.abs() >= SENSITIVITY_STEP_UNITS {
|
||||
let direction = state.sensitivity_accumulator.signum();
|
||||
state.sensitivity_accumulator -= direction * SENSITIVITY_STEP_UNITS;
|
||||
|
||||
if state.sensitivity.adjust(direction) {
|
||||
notifier.show(state.sensitivity)?;
|
||||
haptics.buzz(1);
|
||||
eprintln!(
|
||||
"surface-dial-renewed: sensitivity level {}",
|
||||
state.sensitivity.level()
|
||||
);
|
||||
state.adjusted_while_pressed = true;
|
||||
}
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn multitouch_scroll(delta: i32, state: &mut DriverState, output: &mut VirtualInput) -> Result<()> {
|
||||
if !state.mt_active {
|
||||
state.mt_position = 0;
|
||||
output.multitouch_start()?;
|
||||
state.mt_active = true;
|
||||
}
|
||||
|
||||
// Sensitivity is expressed in milli-pixels so low sensitivity can preserve
|
||||
// fractional motion. A nonzero raw delta rounds away from zero; otherwise a
|
||||
// tiny slow rotation could be observed by evtest but never move the virtual
|
||||
// fingers enough to give libinput a chance to scroll.
|
||||
let scaled_delta = delta
|
||||
.saturating_mul(state.sensitivity.multitouch_milli_pixels())
|
||||
.saturating_add(state.mt_remainder_milli);
|
||||
let mut whole_delta = scaled_delta / 1_000;
|
||||
state.mt_remainder_milli = scaled_delta % 1_000;
|
||||
|
||||
if whole_delta == 0 && scaled_delta != 0 {
|
||||
whole_delta = scaled_delta.signum();
|
||||
state.mt_remainder_milli = 0;
|
||||
}
|
||||
|
||||
state.mt_position = state.mt_position.saturating_add(whole_delta);
|
||||
|
||||
if state.mt_position.abs() > virtual_input::MT_RECENTER_THRESHOLD {
|
||||
// Long scrolls would eventually hit the virtual touchpad coordinate
|
||||
// limits. Recreate the two-finger contact near the baseline and keep
|
||||
// only the latest movement.
|
||||
output.multitouch_end()?;
|
||||
output.multitouch_start()?;
|
||||
state.mt_position = whole_delta;
|
||||
state.mt_remainder_milli = 0;
|
||||
}
|
||||
|
||||
output.multitouch_move(state.mt_position)?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn wheel_scroll(delta: i32, state: &DriverState, output: &mut VirtualInput) -> Result<()> {
|
||||
let ticks = delta.abs().saturating_mul(state.sensitivity.wheel_ticks());
|
||||
let direction = if delta > 0 {
|
||||
WheelDirection::Up
|
||||
} else {
|
||||
WheelDirection::Down
|
||||
};
|
||||
|
||||
for _ in 0..ticks.max(1) {
|
||||
output.wheel_step(direction)?;
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn end_multitouch_if_active(state: &mut DriverState, output: &mut VirtualInput) -> Result<()> {
|
||||
if state.mt_active {
|
||||
// Emit one stationary frame and wait briefly before lifting fingers.
|
||||
// This made libinput less likely to interpret the final delta as a
|
||||
// touchpad flick/coast.
|
||||
output.multitouch_settle(state.mt_position)?;
|
||||
std::thread::sleep(MULTITOUCH_SETTLE_TIMEOUT);
|
||||
output.multitouch_end()?;
|
||||
state.mt_active = false;
|
||||
state.mt_position = 0;
|
||||
state.mt_remainder_milli = 0;
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn parse_mode(args: impl Iterator<Item = String>) -> OutputMode {
|
||||
let mut mode = OutputMode::Multitouch;
|
||||
let mut previous = String::new();
|
||||
|
||||
for arg in args {
|
||||
if previous == "--mode" {
|
||||
mode = parse_mode_value(&arg);
|
||||
} else if let Some(value) = arg.strip_prefix("--mode=") {
|
||||
mode = parse_mode_value(value);
|
||||
}
|
||||
previous = arg;
|
||||
}
|
||||
|
||||
mode
|
||||
}
|
||||
|
||||
fn parse_mode_value(value: &str) -> OutputMode {
|
||||
match value {
|
||||
"wheel" | "scroll" | "regular" => OutputMode::Wheel,
|
||||
"multitouch" | "mt" | "touchpad" => OutputMode::Multitouch,
|
||||
other => {
|
||||
eprintln!("surface-dial-renewed: unknown mode '{other}', using multitouch");
|
||||
OutputMode::Multitouch
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,75 @@
|
||||
use std::process::Command;
|
||||
|
||||
use notify_rust::{Hint, Notification, NotificationHandle, Timeout};
|
||||
|
||||
use crate::error::Result;
|
||||
use crate::sensitivity::Sensitivity;
|
||||
|
||||
pub struct SensitivityNotifier {
|
||||
handle: Option<NotificationHandle>,
|
||||
}
|
||||
|
||||
impl SensitivityNotifier {
|
||||
pub fn new() -> Self {
|
||||
Self { handle: None }
|
||||
}
|
||||
|
||||
pub fn show(&mut self, sensitivity: Sensitivity) -> Result<()> {
|
||||
let text = sensitivity_text(sensitivity);
|
||||
// KDE notifications can collapse/suppress rapid replacement updates.
|
||||
// Plasma's OSD text path is more reliable for a repeatedly-updated
|
||||
// sensitivity readout, so try it first.
|
||||
if show_kde_osd(&text) {
|
||||
return Ok(());
|
||||
}
|
||||
|
||||
// Non-KDE fallback. Replacement by notification id prevents stacking
|
||||
// many sensitivity notifications.
|
||||
let mut notification = Notification::new();
|
||||
notification
|
||||
.appname("surface-dial-renewed")
|
||||
.summary(&format!(
|
||||
"Surface Dial sensitivity: {}",
|
||||
sensitivity.level()
|
||||
))
|
||||
.body(&text)
|
||||
.icon("input-mouse")
|
||||
.hint(Hint::Transient(true))
|
||||
.hint(Hint::Category("device".to_string()))
|
||||
.hint(Hint::CustomInt(
|
||||
"value".to_string(),
|
||||
sensitivity.percent().clamp(0, 100),
|
||||
))
|
||||
.timeout(Timeout::Milliseconds(1_800));
|
||||
|
||||
if let Some(handle) = &self.handle {
|
||||
notification.id(handle.id());
|
||||
}
|
||||
|
||||
self.handle = Some(notification.show()?);
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
fn show_kde_osd(text: &str) -> bool {
|
||||
// Shelling out keeps the dependency set simple. A future direct D-Bus
|
||||
// backend would avoid qdbus locale warnings in journal output.
|
||||
Command::new("qdbus6")
|
||||
.args([
|
||||
"org.kde.plasmashell",
|
||||
"/org/kde/osdService",
|
||||
"org.kde.osdService.showText",
|
||||
"input-mouse",
|
||||
text,
|
||||
])
|
||||
.status()
|
||||
.is_ok_and(|status| status.success())
|
||||
}
|
||||
|
||||
fn sensitivity_text(sensitivity: Sensitivity) -> String {
|
||||
format!(
|
||||
"Surface Dial sensitivity {}/{}",
|
||||
sensitivity.level(),
|
||||
Sensitivity::MAX
|
||||
)
|
||||
}
|
||||
@@ -0,0 +1,43 @@
|
||||
#[derive(Debug, Clone, Copy)]
|
||||
pub struct Sensitivity {
|
||||
level: i32,
|
||||
}
|
||||
|
||||
impl Default for Sensitivity {
|
||||
fn default() -> Self {
|
||||
Self { level: 7 }
|
||||
}
|
||||
}
|
||||
|
||||
impl Sensitivity {
|
||||
pub const MIN: i32 = 1;
|
||||
pub const MAX: i32 = 32;
|
||||
|
||||
pub fn level(self) -> i32 {
|
||||
self.level
|
||||
}
|
||||
|
||||
pub fn percent(self) -> i32 {
|
||||
((self.level - Self::MIN) * 100) / (Self::MAX - Self::MIN)
|
||||
}
|
||||
|
||||
pub fn adjust(&mut self, direction: i32) -> bool {
|
||||
let old = self.level;
|
||||
self.level = (self.level + direction).clamp(Self::MIN, Self::MAX);
|
||||
old != self.level
|
||||
}
|
||||
|
||||
pub fn multitouch_milli_pixels(self) -> i32 {
|
||||
// Milli-pixels allow fractional scaling at low levels while the main
|
||||
// gesture code still writes integer evdev coordinates.
|
||||
500 + (self.level - Self::MIN) * 250
|
||||
}
|
||||
|
||||
pub fn wheel_ticks(self) -> i32 {
|
||||
if self.level >= 8 {
|
||||
2
|
||||
} else {
|
||||
1
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,308 @@
|
||||
use std::io;
|
||||
|
||||
use evdev_rs::enums::*;
|
||||
use evdev_rs::{AbsInfo, Device, InputEvent, TimeVal, UInputDevice};
|
||||
|
||||
use crate::error::Result;
|
||||
|
||||
pub const MT_BASELINE: i32 = 10_000;
|
||||
pub const MT_RECENTER_THRESHOLD: i32 = MT_BASELINE / 2;
|
||||
|
||||
// The touchpad coordinate space is synthetic. Large enough coordinates make
|
||||
// long scrolls possible; recentering in main.rs prevents limit exhaustion.
|
||||
const TOUCHPAD_MAX: i32 = MT_BASELINE * 2;
|
||||
const SLOT_0_TRACKING_ID: i32 = 10;
|
||||
const SLOT_1_TRACKING_ID: i32 = 11;
|
||||
const FINGER_GAP: i32 = MT_BASELINE / 4;
|
||||
const TOUCH_PRESSURE: i32 = 30;
|
||||
const TOUCH_MAJOR: i32 = 700;
|
||||
const TOOL_WIDTH: i32 = 4;
|
||||
const HI_RES_WHEEL_STEP: i32 = 120;
|
||||
|
||||
pub struct VirtualInput {
|
||||
wheel: UInputDevice,
|
||||
touchpad: UInputDevice,
|
||||
}
|
||||
|
||||
#[derive(Debug, Clone, Copy)]
|
||||
pub enum WheelDirection {
|
||||
Up,
|
||||
Down,
|
||||
}
|
||||
|
||||
impl VirtualInput {
|
||||
pub fn new() -> Result<Self> {
|
||||
let wheel = create_wheel_device()?;
|
||||
let touchpad = create_touchpad_device()?;
|
||||
|
||||
// Give udev/libinput a brief chance to notice the new virtual devices
|
||||
// before the first synthetic event is written.
|
||||
std::thread::sleep(std::time::Duration::from_millis(250));
|
||||
|
||||
Ok(Self { wheel, touchpad })
|
||||
}
|
||||
|
||||
pub fn wheel_step(&mut self, direction: WheelDirection) -> Result<()> {
|
||||
let value = match direction {
|
||||
WheelDirection::Up => 1,
|
||||
WheelDirection::Down => -1,
|
||||
};
|
||||
|
||||
self.wheel
|
||||
.write_event(&event_rel(EV_REL::REL_WHEEL, value))?;
|
||||
self.wheel.write_event(&event_rel(
|
||||
EV_REL::REL_WHEEL_HI_RES,
|
||||
value * HI_RES_WHEEL_STEP,
|
||||
))?;
|
||||
self.wheel_syn()?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
pub fn multitouch_start(&mut self) -> Result<()> {
|
||||
// Type-B multitouch start: create slot 0, report one-finger state, then
|
||||
// create slot 1 and switch to two-finger state. This shape mirrors a
|
||||
// real touchpad closely enough for libinput to classify it as scrolling.
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_SLOT, 0))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_TRACKING_ID, SLOT_0_TRACKING_ID))?;
|
||||
self.touchpad.write_event(&event_abs(
|
||||
EV_ABS::ABS_MT_POSITION_X,
|
||||
MT_BASELINE - FINGER_GAP,
|
||||
))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_POSITION_Y, MT_BASELINE))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_PRESSURE, TOUCH_PRESSURE))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_TOUCH_MAJOR, TOUCH_MAJOR))?;
|
||||
self.touchpad
|
||||
.write_event(&event_key(EV_KEY::BTN_TOUCH, 1))?;
|
||||
self.touchpad
|
||||
.write_event(&event_key(EV_KEY::BTN_TOOL_FINGER, 1))?;
|
||||
self.touchpad
|
||||
.write_event(&event_key(EV_KEY::BTN_TOOL_DOUBLETAP, 1))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_X, MT_BASELINE - FINGER_GAP))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_Y, MT_BASELINE))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_PRESSURE, TOUCH_PRESSURE))?;
|
||||
self.touch_syn()?;
|
||||
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_SLOT, 1))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_TRACKING_ID, SLOT_1_TRACKING_ID))?;
|
||||
self.touchpad.write_event(&event_abs(
|
||||
EV_ABS::ABS_MT_POSITION_X,
|
||||
MT_BASELINE + FINGER_GAP,
|
||||
))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_POSITION_Y, MT_BASELINE))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_PRESSURE, TOUCH_PRESSURE))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_TOUCH_MAJOR, TOUCH_MAJOR))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_TOOL_WIDTH, TOOL_WIDTH))?;
|
||||
self.touchpad
|
||||
.write_event(&event_key(EV_KEY::BTN_TOOL_FINGER, 0))?;
|
||||
self.touchpad
|
||||
.write_event(&event_key(EV_KEY::BTN_TOOL_DOUBLETAP, 1))?;
|
||||
self.touch_syn()?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
pub fn multitouch_move(&mut self, y_delta: i32) -> Result<()> {
|
||||
let y = (MT_BASELINE + y_delta).clamp(1, TOUCHPAD_MAX - 1);
|
||||
|
||||
self.write_multitouch_y(y)?;
|
||||
self.touch_syn()?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
pub fn multitouch_settle(&mut self, y_delta: i32) -> Result<()> {
|
||||
// A final stationary frame before lift-off reduces accidental flicking
|
||||
// or coasting at the end of a synthetic scroll gesture.
|
||||
let y = (MT_BASELINE + y_delta).clamp(1, TOUCHPAD_MAX - 1);
|
||||
|
||||
self.write_multitouch_y(y)?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_PRESSURE, TOUCH_PRESSURE))?;
|
||||
self.touch_syn()?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn write_multitouch_y(&mut self, y: i32) -> Result<()> {
|
||||
// Move both virtual fingers together. For two-finger scrolling, libinput
|
||||
// cares about the gesture movement, not about preserving a changing
|
||||
// distance between fingers.
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_SLOT, 0))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_POSITION_Y, y))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_SLOT, 1))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_POSITION_Y, y))?;
|
||||
self.touchpad.write_event(&event_abs(EV_ABS::ABS_Y, y))?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
pub fn multitouch_end(&mut self) -> Result<()> {
|
||||
// End both tracking IDs and clear touch/tool state. If this is skipped
|
||||
// because the process is killed, the uinput device disappearing should
|
||||
// still clear the state in the compositor.
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_SLOT, 0))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_TRACKING_ID, -1))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_SLOT, 1))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_MT_TRACKING_ID, -1))?;
|
||||
self.touchpad
|
||||
.write_event(&event_key(EV_KEY::BTN_TOUCH, 0))?;
|
||||
self.touchpad
|
||||
.write_event(&event_key(EV_KEY::BTN_TOOL_FINGER, 0))?;
|
||||
self.touchpad
|
||||
.write_event(&event_key(EV_KEY::BTN_TOOL_DOUBLETAP, 0))?;
|
||||
self.touchpad
|
||||
.write_event(&event_key(EV_KEY::BTN_TOOL_TRIPLETAP, 0))?;
|
||||
self.touchpad
|
||||
.write_event(&event_key(EV_KEY::BTN_TOOL_QUADTAP, 0))?;
|
||||
self.touchpad
|
||||
.write_event(&event_abs(EV_ABS::ABS_PRESSURE, 0))?;
|
||||
self.touch_syn()?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn wheel_syn(&mut self) -> io::Result<()> {
|
||||
self.wheel.write_event(&event_syn())
|
||||
}
|
||||
|
||||
fn touch_syn(&mut self) -> io::Result<()> {
|
||||
self.touchpad.write_event(&event_syn())
|
||||
}
|
||||
}
|
||||
|
||||
fn create_wheel_device() -> io::Result<UInputDevice> {
|
||||
let device = Device::new().expect("evdev device allocation failed");
|
||||
device.set_name("Surface Dial Renewed Wheel");
|
||||
|
||||
device.enable(&EventType::EV_SYN)?;
|
||||
device.enable(&EventCode::EV_SYN(EV_SYN::SYN_REPORT))?;
|
||||
device.enable(&EventType::EV_REL)?;
|
||||
device.enable(&EventCode::EV_REL(EV_REL::REL_WHEEL))?;
|
||||
device.enable(&EventCode::EV_REL(EV_REL::REL_WHEEL_HI_RES))?;
|
||||
|
||||
UInputDevice::create_from_device(&device)
|
||||
}
|
||||
|
||||
fn create_touchpad_device() -> io::Result<UInputDevice> {
|
||||
let device = Device::new().expect("evdev device allocation failed");
|
||||
device.set_name("Surface Dial Renewed Touchpad");
|
||||
|
||||
device.enable(&InputProp::INPUT_PROP_POINTER)?;
|
||||
// Do not advertise BUTTONPAD or BTN_LEFT. Those made very short gestures
|
||||
// easier for the desktop stack to treat as tap/click behavior.
|
||||
|
||||
device.enable(&EventType::EV_SYN)?;
|
||||
device.enable(&EventCode::EV_SYN(EV_SYN::SYN_REPORT))?;
|
||||
|
||||
device.enable(&EventType::EV_KEY)?;
|
||||
device.enable(&EventCode::EV_KEY(EV_KEY::BTN_TOUCH))?;
|
||||
device.enable(&EventCode::EV_KEY(EV_KEY::BTN_TOOL_FINGER))?;
|
||||
device.enable(&EventCode::EV_KEY(EV_KEY::BTN_TOOL_DOUBLETAP))?;
|
||||
device.enable(&EventCode::EV_KEY(EV_KEY::BTN_TOOL_TRIPLETAP))?;
|
||||
device.enable(&EventCode::EV_KEY(EV_KEY::BTN_TOOL_QUADTAP))?;
|
||||
|
||||
device.enable(&EventType::EV_ABS)?;
|
||||
enable_abs(&device, EV_ABS::ABS_X, 0, TOUCHPAD_MAX, MT_BASELINE)?;
|
||||
enable_abs(&device, EV_ABS::ABS_Y, 0, TOUCHPAD_MAX, MT_BASELINE)?;
|
||||
enable_abs(&device, EV_ABS::ABS_PRESSURE, 0, 255, 0)?;
|
||||
enable_abs(&device, EV_ABS::ABS_TOOL_WIDTH, 0, 15, 0)?;
|
||||
enable_abs(&device, EV_ABS::ABS_MT_SLOT, 0, 4, 0)?;
|
||||
enable_abs(&device, EV_ABS::ABS_MT_TOUCH_MAJOR, 0, 2_500, 0)?;
|
||||
enable_abs(&device, EV_ABS::ABS_MT_TRACKING_ID, 0, 65535, 0)?;
|
||||
enable_abs(
|
||||
&device,
|
||||
EV_ABS::ABS_MT_POSITION_X,
|
||||
0,
|
||||
TOUCHPAD_MAX,
|
||||
MT_BASELINE,
|
||||
)?;
|
||||
enable_abs(
|
||||
&device,
|
||||
EV_ABS::ABS_MT_POSITION_Y,
|
||||
0,
|
||||
TOUCHPAD_MAX,
|
||||
MT_BASELINE,
|
||||
)?;
|
||||
enable_abs(&device, EV_ABS::ABS_MT_PRESSURE, 0, 255, 0)?;
|
||||
|
||||
UInputDevice::create_from_device(&device)
|
||||
}
|
||||
|
||||
fn enable_abs(
|
||||
device: &Device,
|
||||
code: EV_ABS,
|
||||
minimum: i32,
|
||||
maximum: i32,
|
||||
value: i32,
|
||||
) -> io::Result<()> {
|
||||
// Resolution affects how libinput interprets physical movement. Keep this
|
||||
// consistent across axes unless the gesture scaling is retuned deliberately.
|
||||
device.enable_event_code(
|
||||
&EventCode::EV_ABS(code),
|
||||
Some(&AbsInfo {
|
||||
value,
|
||||
minimum,
|
||||
maximum,
|
||||
fuzz: 0,
|
||||
flat: 0,
|
||||
resolution: 32,
|
||||
}),
|
||||
)
|
||||
}
|
||||
|
||||
fn event_syn() -> InputEvent {
|
||||
InputEvent {
|
||||
time: TimeVal::new(0, 0),
|
||||
event_code: EventCode::EV_SYN(EV_SYN::SYN_REPORT),
|
||||
event_type: EventType::EV_SYN,
|
||||
value: 0,
|
||||
}
|
||||
}
|
||||
|
||||
fn event_key(code: EV_KEY, value: i32) -> InputEvent {
|
||||
InputEvent {
|
||||
time: TimeVal::new(0, 0),
|
||||
event_code: EventCode::EV_KEY(code),
|
||||
event_type: EventType::EV_KEY,
|
||||
value,
|
||||
}
|
||||
}
|
||||
|
||||
fn event_rel(code: EV_REL, value: i32) -> InputEvent {
|
||||
InputEvent {
|
||||
time: TimeVal::new(0, 0),
|
||||
event_code: EventCode::EV_REL(code),
|
||||
event_type: EventType::EV_REL,
|
||||
value,
|
||||
}
|
||||
}
|
||||
|
||||
fn event_abs(code: EV_ABS, value: i32) -> InputEvent {
|
||||
InputEvent {
|
||||
time: TimeVal::new(0, 0),
|
||||
event_code: EventCode::EV_ABS(code),
|
||||
event_type: EventType::EV_ABS,
|
||||
value,
|
||||
}
|
||||
}
|
||||
Executable
+13
@@ -0,0 +1,13 @@
|
||||
#!/usr/bin/env bash
|
||||
set -euo pipefail
|
||||
|
||||
systemctl --user disable --now surface-dial-renewed.service || true
|
||||
rm -f "${HOME}/.config/systemd/user/surface-dial-renewed.service"
|
||||
systemctl --user daemon-reload
|
||||
|
||||
sudo rm -f /etc/udev/rules.d/70-surface-dial-renewed-uinput.rules
|
||||
sudo rm -f /etc/udev/rules.d/70-surface-dial-renewed-input.rules
|
||||
sudo rm -f /etc/udev/rules.d/70-surface-dial-renewed-hidraw.rules
|
||||
sudo udevadm control --reload-rules
|
||||
|
||||
cargo uninstall surface-dial-renewed || true
|
||||
Reference in New Issue
Block a user