NAME

       cmx — Omnikey CardMan 4040 smartcard reader device driver

SYNOPSIS

       device cmx

DESCRIPTION

       The  cmx  driver provides support for the PCCARD based Omnikey CardMan 4040 smartcard reader.  The driver
       provides a character device special file based Chip/Smart Card Interface Devices (CCID)  interface.   The
       driver implements what the vendor calls the Synchronous API onto the smartcard reader device.

       Reading  and  writing  is synchronous, meaning that a call to write(2) directly corresponds to a complete
       CCID command sent to the device, while the following 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  write(2)  and  the  complete
       CCID response must fit into the buffer supplied to read(2).

       Non-blocking I/O, select(2) and 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.

FILES

       /dev/cmxn                   Character device special file.
       /usr/ports/security/openct  OpenCT, a userspace smartcard daemon containing a CCID driver which  directly
                                   supports cmx devices.

COMPATIBILITY

       Userland  smartcard  code  written for the vendor's Linux drivers should work with the cmx driver without
       modification.

SEE ALSO

       pccard(4)

HISTORY

       The cmx driver first appeared in FreeBSD 7.1.

AUTHORS

       The cmx driver was written by Daniel Roethlisberger <daniel@roe.ch>, originally based on the Linux driver
       v1.1.0 by Omnikey GmbH www.omnikey.com.  Early testing and bug fixes by Marcin Cieslak <saper@system.pl>.

BUGS

       The way the cmx 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.

Debian                                            July 7, 2007                                            CMX(4)