NAME

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

SYNOPSIS

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

           device usb
           device ucom
           device umcs

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

           umcs_load="YES"

DESCRIPTION

     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.

HARDWARE

     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

FILES

     /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

SEE ALSO

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

HISTORY

     The umcs driver appeared in ports since December of 2010.

AUTHORS

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

BUGS

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