What is VoodooSMBus?
VoodooSMBus solves two related problems:- VoodooSMBus is a project that provides a kernel extension (driver) for macOS that adds support for the SMBus capabilities of Intel I/O Controller Hubs (ICH), also called i801 SMBus.
- VoodooSMBus also contains a slave device driver for the ELAN Touchpad device found on the SMBus of some Thinkpad models (T480s, L380, P52) making it possible to use multitouch gestures efficiently.
VoodooSMBus ports the i2c-i8011 driver and the elan_i2c_smbus2 from linux to macOS.
In the future we might want to split up the project, similar as it has been done in VoodooI2C, into a controller kext and kexts for the slave device drivers.
Installation
- Add VoodooPS2Controller.kext
- Add the patch in config.plist.patch, so VoodooPS2Controller does not attach itself to the PS2 interface of the touchpad
- Delete VoodooPS2Controller.kext/Contents/PlugIns/VoodooPS2Mouse.kext, otherwise the touchpad will not work after sleep
- Add the four patches found here https://github.com/leo-labs/macOS-T...ter/EFI/CLOVER/config.example.plist#L436-L467 and https://github.com/leo-labs/macOS-T...ter/EFI/CLOVER/config.example.plist#L500-L535 to supress loading of those kexts
- Install this kext
Configuration
Some settings can be configured in the Configuration dictionary in Info.plist:- DisableWhileTyping Enable disable while typing functionality. After a key press the touchpad is deactivated for a certain amount of time, specified by
- DisableWhileTypingTimeoutMs The amount of time in milliseconds that touch input is ignored after typing
- DisableWhileTrackpoint Disables the touchpad when the trackpoint is in use.
- DisableWhileTrackpointTimeoutMs The amount of time in milliseconds that touch input is ignored after trackpoint usage
- IgnoreSetTouchpadStatus Ignores messages from the keyboard driver to disable the touchpad. If not ignored, the touchpad can usually be toggled with the PrtSc key.
Current Status
Currently the following Intel I/O Controller Hubs are supported and tested:Name | Id | Device |
---|---|---|
Sunrise Point-LP (PCH) | pci8086,9d23 | Thinkpad T480s, L380 |
Cannon Lake-H (PCH) | pci8086,a323 | Thinkpad P52 |
Trackpoint support is implemented, make sure to activate the trackpoint in BIOS.
For a list of planned features, see https://github.com/leo-labs/VoodooSMBus/labels/enhancement
Supported Gestures
For supported gestures please see https://voodooi2c.github.io/#Supported Gestures/Supported GesturesAcknowledgments
Thanks to:- @gokula for the first version of an SMBus driver for the touchpad https://github.com/gokula/ELANSMBus
- @alexandred, @coolstar, @kprinssu (& others) for the development of the VoodooI2C kernel extension, VoodooI2CELAN satellite and the native gestures implementation. https://github.com/alexandred/VoodooI2C & https://github.com/kprinssu/VoodooI2CELAN/tree/master
- @rehabman for the VoodooPS2 kernel extension and all other stuff he makes. https://github.com/RehabMan/OS-X-Voodoo-PS2-Controller
- @dukzcry for his Intel ICH SMBus controller which was of great help in the driver development. https://github.com/dukzcry/osx-goodies/tree/master/ic
- all linux kernel driver developers (especially the ones responsible for the i2c/smbus implementation and the elan i2c/smbus driver)
Changelog v2.2
- Support for OpenCore
- Switch to message based communication between SMBus controller and devices on the bus
In v3 we will change the driver model so that https://github.com/VoodooSMBus/VoodooRMI will be supported and the ELAN driver will be moved into it's own project.
Footnotes
1: https://github.com/torvalds/linux/blob/master/drivers/i2c/busses/i2c-i801.c2: https://github.com/torvalds/linux/blob/master/drivers/input/mouse/elan_i2c_smbus.c