umcs — USB support for serial adapters based on the MCS7820 and MCS7840 chips

       The umcs driver was written by Lev Serebryakov <lev@FreeBSD.org>.

       This  driver  doesn't  support  access  to  any  fine  tunes of chip, like RS522/RS485 mode, non-standard
       baudrates, etc.

Debian                                           April 26, 2017                                          UMCS(4)

       The  umcs  driver  provides support for various multiport serial adapters based on the MosCom MCS7820 and
       MCS7840 chips.  They are 2- or  4-port  adapters  with  full-featured  16550-compatible  UARTs  and  very
       flexible baud generators.  Also, these chips support RS422/RS485 and IrDA operations.

       The device is accessed through the ucom(4) driver which makes it behave like a tty(4).

       Different ports on device are presented as sub-units, like /dev/ttyU0.1 and /dev/ttyU0.2.

/dev/ttyU*.*       for callin ports
       /dev/ttyU*.*.init/dev/ttyU*.*.lock  corresponding callin initial-state and lock-state devices

       /dev/cuaU*.*       for callout ports
       /dev/cuaU*.*.init/dev/cuaU*.*.lock  corresponding callout initial-state and lock-state devices

       The umcs driver was tested on the following adapters:

       •   ST Lab U-360 two-port serial USB adapter
       •   ST Lab U-400 four-port serial USB adapter

       The umcs driver appeared in ports since December of 2010.

       umcs — USB support for serial adapters based on the MCS7820 and MCS7840 chips

tty(4), ucom(4), usb(4)

       To compile this driver into the kernel, place the following lines in your kernel configuration file:

             deviceusbdeviceucomdeviceumcs

       Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

             umcs_load="YES"