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History: see the git log.
Work sponsored by: Sigos GmbH, Germany
info@sigos.de
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This driver exists because the "normal" serial driver
doesn't work too well with GSM modems. Issues: --
data loss -- one single Receive URB is not nearly
enough - nonstandard flow (Option devices) control
- controlling the baud rate doesn't make sense
This driver is named "option" because the most
common device it's used for is a PC-Card (with an
internal OHCI-USB interface, behind which the GSM
interface sits), made by Option Inc.
Some of the "one port" devices actually exhibit
multiple USB instances on the USB bus. This is not a
bug, these ports are used for different device
features.
Copyright 2003 (C) Al Borchers
alborchers@steinerpoint.com
(
This code is based in part on the Gadget Zero driver,
which is Copyright (C) 2003 by David Brownell, all
rights reserved.
This code also borrows from usbserial.c, which is
Copyright (C) 1999 - 2002 Greg Kroah-Hartman
greg@kroah.com
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