Copyright (c) 2006-2007 Daniel Roethlisberger <daniel@roe.ch>
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$FreeBSD: releng/11.0/share/man/man4/cmx.4 301597 2016-06-08 10:26:17Z trasz $
.Dd July 7, 2007 .Dt CMX 4 .Os .Sh NAME .Nm cmx .Nd Omnikey CardMan 4040 smartcard reader device driver .Sh SYNOPSIS .Cd device cmx .Sh DESCRIPTION The .Nm driver provides support for the PCCARD based .Em Omnikey CardMan 4040 smartcard reader. The driver provides a character device special file based .Em Chip/Smart Card Interface Devices (CCID) interface. The driver implements what the vendor calls the .Em Synchronous API onto the smartcard reader device.
p Reading and writing is synchronous, meaning that a call to .Xr write 2 directly corresponds to a complete CCID command sent to the device, while the following .Xr read 2 will return the complete answer from the reader. There is no support for partial reads or writes. There is no upper limit on CCID request or response sizes, but the complete CCID request must be sent to the driver in .Xr write 2 and the complete CCID response must fit into the buffer supplied to .Xr read 2 .
p
Non-blocking I/O,
.Xr select 2
and
.Xr poll 2
are supported and work as expected.
An open file descriptor
will always be ready for writing, but only ready for reading
if the device indicates that it has data available.
.Sh FILES
l -tag -width /usr/ports/security/openct -compact t Pa /dev/cmxn Character device special file.
t Pa /usr/ports/security/openct OpenCT, a userspace smartcard daemon containing a
.Em CCID
driver which directly supports
.Nm
devices.
.It Pa /usr/ports/devel/pcsc-lite
PC/SC-Lite, a userspace smartcard daemon.
.It Pa /usr/ports/devel/libccid
libccid, a generic
.Em CCID
driver for use by PC/SC-Lite to interface to
.Nm
devices.
.El
.Sh COMPATIBILITY
Userland smartcard code written for the vendor's Linux drivers
should work with the
.Nm
driver without modification.
.Sh SEE ALSO
.Xr pccard 4
.Sh HISTORY
The
.Nm cmx
driver first appeared in
.Fx 7.1 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Daniel Roethlisberger Aq Mt daniel@roe.ch ,
originally based on the Linux driver v1.1.0 by
.An Omnikey GmbH Lk www.omnikey.com .
Early testing and bug fixes by
.An Marcin Cieslak Aq Mt saper@system.pl .
.Sh BUGS
.An -nosplit
The way the
.Nm
driver talks to the CardMan 4040 is a bit rough.
Due to the complete lack of hardware documentation other than vendor drivers
for other operating systems, the gory details of the device's
I/O registers are not understood very well.
There may be error conditions which can only be solved by physically
reinserting the reader.