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28 lines
1.5 KiB
28 lines
1.5 KiB
This a proof-of-concept Linux userspace driver to hardware-enable/-disable the touchpads on TongFang/Uniwill laptops. This will also trigger the disabled-led, formerly unfunctional under linux.
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It syncs up with the software toggle in the gnome settings deamon.
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It comes with some known disfuctionalities:
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- only works on desktop evnironments using gsettings/gio
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- does not work on loginscreen(gdm)
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- needs to be started for every user seperatly
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- no script/package to setup autostart
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- every user needs write access to the /dev/hidraw* device for the touchpad (udev *.rules giving read and write access included, could be trimmed down to write only)
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- switching between 2 users is not detected (on next toggle the software and hardware disable will be in sync again however)
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Author: Werner Sembach
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Raw i2c communication with the touchpad for reference:
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```
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0x22 0x00 0x37 0x03 0x23 0x00 0x04 0x00 0x07 0x03
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[^^ ^^] (?max?) length of report? in little endian
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^ 2 bits reserved + report type
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^ report id (defined by touchpad controller?
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^ reserved
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^ opcode (0x2 = GET_REPORT, 0x3 = SET_REPORT)
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[^^ ^^ ^^ ^^ ^^] ?i2c-hid stuff?
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^ ?report id again?
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^^ report/payload: defined by touchpad controller? 0x03 enabled (0x02 auch, keine ahnung was das unterste bit tut), 0x00 disabled
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```
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