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UMCS(4) NetBSD Kernel Interfaces Manual UMCS(4)
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umcs -- USB multiport serial adapters driver
umcs* at uhub?
ucom* at umcs?
The umcs driver supports a wide variety of hardware based on the MosChip
7810, 7820, 7840 chipsets and clones thereof. Devices range from single
port to eight port (implemented as a USB hub and two umcs four port
instances behind it).
Examples of hardware known to work with this driver are:
The umcs driver attaches the MosChip multiport chipset with individual
port drivers via ucom(4), which makes it behave like a tty(4).
tty(4), ucom(4), usb(4)
The umcs driver appeared in NetBSD 7.
NetBSD 9.0 May 7, 2019 NetBSD 9.0