Copyright (c) 2010 Lev Serebryakov <lev@FreeBSD.org>.
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$FreeBSD: releng/11.0/share/man/man4/umcs.4 267938 2014-06-26 21:46:14Z bapt $
.Dd February 25, 2012 .Dt UMCS 4 .Os .Sh NAME .Nm umcs .Nd USB support for serial adapters based on the MCS7820 and MCS7840 chips .Sh SYNOPSIS To compile this driver into the kernel, place the following lines in your kernel configuration file: d -ragged -offset indent .Cd "device usb" .Cd "device ucom" .Cd "device umcs" .Ed
p Alternatively, to load the driver as a module at boot time, place the following line in .Xr loader.conf 5 : d -literal -offset indent umcs_load="YES" .Ed .Sh DESCRIPTION The .Nm 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.
p The device is accessed through the .Xr ucom 4 driver which makes it behave like a .Xr tty 4 .
p Different ports on device are presented as sub-units, like
a /dev/ttyU0.2 . .Sh HARDWARE The .Nm driver was tested on the following adapters:
p l -bullet -compact t ST Lab U-360 two-port serial USB adapter t ST Lab U-400 four-port serial USB adapter .El .Sh SEE ALSO .Xr tty 4 , .Xr ucom 4 , .Xr usb 4 .Sh HISTORY The .Nm driver appeared in ports since December of 2010. .Sh AUTHORS .An -nosplit The .Nm driver was written by .An Lev Serebryakov Aq Mt lev@FreeBSD.org . .Sh BUGS This driver doesn't support access to any fine tunes of chip, like RS522/RS485 mode, non-standard baudrates, etc.