2 commits

Author	SHA1	Message	Date
Andriy Gapon	ef32901b25	cp2112: a number of cleanups and improvements ... - hoist all request / response structures from function level to top level - replace magic numeric literals with constants - regroup types, data and functions - remove setting of the id field in responses as they are completely overwritten with data from the device - centralize setting of the id field as it is always set to the value of request type - fix setting and querying of open-drain vs push-pull configuration of an output pin -- it's always in one of those configurations - detect special pin configurations: a pin in a special configuration is neither general purpose input or output - there is still no support for setting special configurations MFC after: 2 weeks	2020-08-12 09:07:07 +00:00
Andriy Gapon	c178a7e73c	cp2112: driver for the namesake GPIO and I2C master gadget ... Documentation: - CP2112 Datasheet https://www.silabs.com/documents/public/data-sheets/cp2112-datasheet.pdf - AN495: CP2112 Interface Specification https://www.silabs.com/documents/public/application-notes/an495-cp2112-interface-specification.pdf - CP2112 Errata https://www.silabs.com/documents/public/errata/cp2112-errata.pdf The logic is implemented as three sub-drivers. The parent driver claims the USB device and creates two child devices. One acts as a GPIO controller and the other is an I2C controller. Tested with CP2112 revision F02. Both features seem to work. HTU21 sensor was used as an I2C slave. Reviewed by: adrian, hselasky MFC after: 2 weeks Relnotes: maybe Differential Revision: https://reviews.freebsd.org/D25359	2020-08-06 13:41:42 +00:00