115 lines
3.3 KiB
Nix
115 lines
3.3 KiB
Nix
{ config, lib, ... }:
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with lib;
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{
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###### interface
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options = {
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hardware.trackpoint = {
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enable = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Enable sensitivity and speed configuration for trackpoints.
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'';
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};
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sensitivity = mkOption {
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default = 128;
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example = 255;
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type = types.int;
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description = ''
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Configure the trackpoint sensitivity. By default, the kernel
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configures 128.
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'';
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};
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speed = mkOption {
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default = 97;
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example = 255;
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type = types.int;
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description = ''
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Configure the trackpoint speed. By default, the kernel
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configures 97.
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'';
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};
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emulateWheel = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Enable scrolling while holding the middle mouse button.
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'';
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};
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fakeButtons = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Switch to "bare" PS/2 mouse support in case Trackpoint buttons are not recognized
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properly. This can happen for example on models like the L430, T450, T450s, on
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which the Trackpoint buttons are actually a part of the Synaptics touchpad.
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'';
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};
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device = mkOption {
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default = "TPPS/2 IBM TrackPoint";
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type = types.str;
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description = ''
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The device name of the trackpoint. You can check with xinput.
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Some newer devices (example x1c6) use "TPPS/2 Elan TrackPoint".
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'';
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};
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};
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};
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###### implementation
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config =
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let cfg = config.hardware.trackpoint; in
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mkMerge [
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(mkIf cfg.enable {
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services.udev.extraRules =
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''
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ACTION=="add|change", SUBSYSTEM=="input", ATTR{name}=="${cfg.device}", ATTR{device/speed}="${toString cfg.speed}", ATTR{device/sensitivity}="${toString cfg.sensitivity}"
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'';
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systemd.services.trackpoint = {
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wantedBy = [ "sysinit.target" ] ;
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before = [ "sysinit.target" "shutdown.target" ];
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conflicts = [ "shutdown.target" ];
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unitConfig.DefaultDependencies = false;
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serviceConfig.Type = "oneshot";
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serviceConfig.RemainAfterExit = true;
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serviceConfig.ExecStart = ''
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${config.systemd.package}/bin/udevadm trigger --attr-match=name="${cfg.device}"
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'';
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};
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})
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(mkIf (cfg.emulateWheel) {
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services.xserver.inputClassSections = [
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''
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Identifier "Trackpoint Wheel Emulation"
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MatchProduct "${if cfg.fakeButtons then "PS/2 Generic Mouse" else "ETPS/2 Elantech TrackPoint|Elantech PS/2 TrackPoint|TPPS/2 IBM TrackPoint|DualPoint Stick|Synaptics Inc. Composite TouchPad / TrackPoint|ThinkPad USB Keyboard with TrackPoint|USB Trackpoint pointing device|Composite TouchPad / TrackPoint|${cfg.device}"}"
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MatchDevicePath "/dev/input/event*"
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Option "EmulateWheel" "true"
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Option "EmulateWheelButton" "2"
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Option "Emulate3Buttons" "false"
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Option "XAxisMapping" "6 7"
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Option "YAxisMapping" "4 5"
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''
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];
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})
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(mkIf cfg.fakeButtons {
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boot.extraModprobeConfig = "options psmouse proto=bare";
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})
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];
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}
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