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 umcsAlternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
umcs_load="YES"
DESCRIPTION
Theumcs 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
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.