This document is a udev rules file for the FTDI FT2232D, FT2232H, FT232H, and Gadget Factory Papilio DUO (which uses an FT2232H with a custom product ID).
For instructions on how to use 85-ftdi.rules, see Installing and Running XXICC rev 0.0q step 9.
If you'd rather just copy and paste text, here's the contents of 85-ftdi.rules:
# FTDI rules
ATTR{idVendor}=="0403", ATTR{idProduct}=="6010", MODE="660", GROUP="dialout"
ATTR{idVendor}=="0403", ATTR{idProduct}=="6014", MODE="660", GROUP="dialout"
# These two lines are for Papilio DUO, from Jack Gassett at Gadget Factory Forum.
SUBSYSTEMS=="usb", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="7bc0", GROUP="dialout"
ACTION=="add", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="7bc0", \
RUN+="/sbin/modprobe ftdi_sio", \
RUN+="/bin/sh -c 'echo 0403 7bc0 > /sys/bus/usb-serial/drivers/ftdi_sio/new_id'"
