794c944ecd
- usb_kill_urb() cleanup Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2241 lines
73 KiB
C
2241 lines
73 KiB
C
/*
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* USB FTDI SIO driver
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*
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* Copyright (C) 1999 - 2001
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* Greg Kroah-Hartman (greg@kroah.com)
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* Bill Ryder (bryder@sgi.com)
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* Copyright (C) 2002
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* Kuba Ober (kuba@mareimbrium.org)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* See Documentation/usb/usb-serial.txt for more information on using this driver
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*
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* See http://ftdi-usb-sio.sourceforge.net for upto date testing info
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* and extra documentation
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*
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* (21/Jul/2004) Ian Abbott
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* Incorporated Steven Turner's code to add support for the FT2232C chip.
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* The prelimilary port to the 2.6 kernel was by Rus V. Brushkoff. I have
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* fixed a couple of things.
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*
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* (27/May/2004) Ian Abbott
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* Improved throttling code, mostly stolen from the WhiteHEAT driver.
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*
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* (26/Mar/2004) Jan Capek
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* Added PID's for ICD-U20/ICD-U40 - incircuit PIC debuggers from CCS Inc.
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*
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* (09/Feb/2004) Ian Abbott
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* Changed full name of USB-UIRT device to avoid "/" character.
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* Added FTDI's alternate PID (0x6006) for FT232/245 devices.
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* Added PID for "ELV USB Module UO100" from Stefan Frings.
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*
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* (21/Oct/2003) Ian Abbott
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* Renamed some VID/PID macros for Matrix Orbital and Perle Systems
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* devices. Removed Matrix Orbital and Perle Systems devices from the
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* 8U232AM device table, but left them in the FT232BM table, as they are
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* known to use only FT232BM.
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*
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* (17/Oct/2003) Scott Allen
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* Added vid/pid for Perle Systems UltraPort USB serial converters
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*
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* (21/Sep/2003) Ian Abbott
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* Added VID/PID for Omnidirectional Control Technology US101 USB to
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* RS-232 adapter (also rebadged as Dick Smith Electronics XH6381).
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* VID/PID supplied by Donald Gordon.
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*
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* (19/Aug/2003) Ian Abbott
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* Freed urb's transfer buffer in write bulk callback.
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* Omitted some paranoid checks in write bulk callback that don't matter.
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* Scheduled work in write bulk callback regardless of port's open count.
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*
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* (05/Aug/2003) Ian Abbott
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* Added VID/PID for ID TECH IDT1221U USB to RS-232 adapter.
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* VID/PID provided by Steve Briggs.
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*
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* (23/Jul/2003) Ian Abbott
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* Added PIDs for CrystalFontz 547, 633, 631, 635, 640 and 640 from
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* Wayne Wylupski.
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*
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* (10/Jul/2003) David Glance
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* Added PID for DSS-20 SyncStation cradle for Sony-Ericsson P800.
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*
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* (27/Jun/2003) Ian Abbott
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* Reworked the urb handling logic. We have no more pool, but dynamically
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* allocate the urb and the transfer buffer on the fly. In testing this
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* does not incure any measurable overhead. This also relies on the fact
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* that we have proper reference counting logic for urbs. I nicked this
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* from Greg KH's Visor driver.
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*
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* (23/Jun/2003) Ian Abbott
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* Reduced flip buffer pushes and corrected a data length test in
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* ftdi_read_bulk_callback.
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* Defererence pointers after any paranoid checks, not before.
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*
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* (21/Jun/2003) Erik Nygren
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* Added support for Home Electronics Tira-1 IR transceiver using FT232BM chip.
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* See <http://www.home-electro.com/tira1.htm>. Only operates properly
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* at 100000 and RTS-CTS, so set custom divisor mode on startup.
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* Also force the Tira-1 and USB-UIRT to only use their custom baud rates.
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*
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* (18/Jun/2003) Ian Abbott
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* Added Device ID of the USB relais from Rudolf Gugler (backported from
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* Philipp G<>hring's patch for 2.5.x kernel).
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* Moved read transfer buffer reallocation into startup function.
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* Free existing write urb and transfer buffer in startup function.
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* Only use urbs in write urb pool that were successfully allocated.
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* Moved some constant macros out of functions.
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* Minor whitespace and comment changes.
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*
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* (12/Jun/2003) David Norwood
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* Added support for USB-UIRT IR transceiver using 8U232AM chip.
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* See <http://home.earthlink.net/~jrhees/USBUIRT/index.htm>. Only
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* operates properly at 312500, so set custom divisor mode on startup.
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*
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* (12/Jun/2003) Ian Abbott
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* Added Sealevel SeaLINK+ 210x, 220x, 240x, 280x vid/pids from Tuan Hoang
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* - I've eliminated some that don't seem to exist!
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* Added Home Electronics Tira-1 IR transceiver pid from Chris Horn
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* Some whitespace/coding-style cleanups
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*
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* (11/Jun/2003) Ian Abbott
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* Fixed unsafe spinlock usage in ftdi_write
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*
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* (24/Feb/2003) Richard Shooter
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* Increase read buffer size to improve read speeds at higher baud rates
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* (specifically tested with up to 1Mb/sec at 1.5M baud)
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*
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* (23/Feb/2003) John Wilkins
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* Added Xon/xoff flow control (activating support in the ftdi device)
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* Added vid/pid for Videonetworks/Homechoice (UK ISP)
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*
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* (23/Feb/2003) Bill Ryder
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* Added matrix orb device vid/pids from Wayne Wylupski
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*
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* (19/Feb/2003) Ian Abbott
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* For TIOCSSERIAL, set alt_speed to 0 when ASYNC_SPD_MASK value has
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* changed to something other than ASYNC_SPD_HI, ASYNC_SPD_VHI,
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* ASYNC_SPD_SHI or ASYNC_SPD_WARP. Also, unless ASYNC_SPD_CUST is in
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* force, don't bother changing baud rate when custom_divisor has changed.
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*
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* (18/Feb/2003) Ian Abbott
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* Fixed TIOCMGET handling to include state of DTR and RTS, the state
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* of which are now saved by set_dtr() and set_rts().
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* Fixed improper storage class for buf in set_dtr() and set_rts().
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* Added FT232BM chip type and support for its extra baud rates (compared
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* to FT8U232AM).
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* Took account of special case divisor values for highest baud rates of
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* FT8U232AM and FT232BM.
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* For TIOCSSERIAL, forced alt_speed to 0 when ASYNC_SPD_CUST kludge used,
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* as previous alt_speed setting is now stale.
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* Moved startup code common between the startup routines for the
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* different chip types into a common subroutine.
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*
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* (17/Feb/2003) Bill Ryder
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* Added write urb buffer pool on a per device basis
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* Added more checking for open file on callbacks (fixed OOPS)
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* Added CrystalFontz 632 and 634 PIDs
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* (thanx to CrystalFontz for the sample devices - they flushed out
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* some driver bugs)
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* Minor debugging message changes
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* Added throttle, unthrottle and chars_in_buffer functions
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* Fixed FTDI_SIO (the original device) bug
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* Fixed some shutdown handling
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*
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*
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*
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*
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* (07/Jun/2002) Kuba Ober
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* Changed FTDI_SIO_BASE_BAUD_TO_DIVISOR macro into ftdi_baud_to_divisor
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* function. It was getting too complex.
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* Fix the divisor calculation logic which was setting divisor of 0.125
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* instead of 0.5 for fractional parts of divisor equal to 5/8, 6/8, 7/8.
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* Also make it bump up the divisor to next integer in case of 7/8 - it's
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* a better approximation.
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*
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* (25/Jul/2002) Bill Ryder inserted Dmitri's TIOCMIWAIT patch
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* Not tested by me but it doesn't break anything I use.
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*
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* (04/Jan/2002) Kuba Ober
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* Implemented 38400 baudrate kludge, where it can be substituted with other
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* values. That's the only way to set custom baudrates.
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* Implemented TIOCSSERIAL, TIOCGSERIAL ioctl's so that setserial is happy.
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* FIXME: both baudrate things should eventually go to usbserial.c as other
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* devices may need that functionality too. Actually, it can probably be
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* merged in serial.c somehow - too many drivers repeat this code over
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* and over.
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* Fixed baudrate forgetfulness - open() used to reset baudrate to 9600 every time.
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* Divisors for baudrates are calculated by a macro.
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* Small code cleanups. Ugly whitespace changes for Plato's sake only ;-].
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*
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* (04/Nov/2001) Bill Ryder
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* Fixed bug in read_bulk_callback where incorrect urb buffer was used.
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* Cleaned up write offset calculation
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* Added write_room since default values can be incorrect for sio
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* Changed write_bulk_callback to use same queue_task as other drivers
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* (the previous version caused panics)
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* Removed port iteration code since the device only has one I/O port and it
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* was wrong anyway.
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*
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* (31/May/2001) gkh
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* Switched from using spinlock to a semaphore, which fixes lots of problems.
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*
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* (23/May/2001) Bill Ryder
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* Added runtime debug patch (thanx Tyson D Sawyer).
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* Cleaned up comments for 8U232
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* Added parity, framing and overrun error handling
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* Added receive break handling.
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*
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* (04/08/2001) gb
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* Identify version on module load.
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*
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* (18/March/2001) Bill Ryder
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* (Not released)
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* Added send break handling. (requires kernel patch too)
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* Fixed 8U232AM hardware RTS/CTS etc status reporting.
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* Added flipbuf fix copied from generic device
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*
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* (12/3/2000) Bill Ryder
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* Added support for 8U232AM device.
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* Moved PID and VIDs into header file only.
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* Turned on low-latency for the tty (device will do high baudrates)
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* Added shutdown routine to close files when device removed.
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* More debug and error message cleanups.
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*
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* (11/13/2000) Bill Ryder
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* Added spinlock protected open code and close code.
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* Multiple opens work (sort of - see webpage mentioned above).
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* Cleaned up comments. Removed multiple PID/VID definitions.
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* Factorised cts/dtr code
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* Made use of __FUNCTION__ in dbg's
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*
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* (11/01/2000) Adam J. Richter
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* usb_device_id table support
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*
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* (10/05/2000) gkh
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* Fixed bug with urb->dev not being set properly, now that the usb
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* core needs it.
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*
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* (09/11/2000) gkh
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* Removed DEBUG #ifdefs with call to usb_serial_debug_data
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*
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* (07/19/2000) gkh
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* Added module_init and module_exit functions to handle the fact that this
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* driver is a loadable module now.
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*
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* (04/04/2000) Bill Ryder
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* Fixed bugs in TCGET/TCSET ioctls (by removing them - they are
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* handled elsewhere in the tty io driver chain).
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*
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* (03/30/2000) Bill Ryder
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* Implemented lots of ioctls
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* Fixed a race condition in write
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* Changed some dbg's to errs
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*
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* (03/26/2000) gkh
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* Split driver up into device specific pieces.
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*
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*/
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/* Bill Ryder - bryder@sgi.com - wrote the FTDI_SIO implementation */
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/* Thanx to FTDI for so kindly providing details of the protocol required */
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/* to talk to the device */
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/* Thanx to gkh and the rest of the usb dev group for all code I have assimilated :-) */
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/spinlock.h>
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#include <asm/uaccess.h>
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#include <linux/usb.h>
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#include <linux/serial.h>
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#include <linux/usb/serial.h>
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#include "ftdi_sio.h"
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/*
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* Version Information
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*/
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#define DRIVER_VERSION "v1.4.3"
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#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Bill Ryder <bryder@sgi.com>, Kuba Ober <kuba@mareimbrium.org>"
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#define DRIVER_DESC "USB FTDI Serial Converters Driver"
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static int debug;
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static __u16 vendor = FTDI_VID;
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static __u16 product;
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/* struct ftdi_sio_quirk is used by devices requiring special attention. */
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struct ftdi_sio_quirk {
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void (*setup)(struct usb_serial *); /* Special settings during startup. */
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};
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static void ftdi_USB_UIRT_setup (struct usb_serial *serial);
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static void ftdi_HE_TIRA1_setup (struct usb_serial *serial);
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static struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = {
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.setup = ftdi_USB_UIRT_setup,
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};
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static struct ftdi_sio_quirk ftdi_HE_TIRA1_quirk = {
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.setup = ftdi_HE_TIRA1_setup,
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};
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/*
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* The 8U232AM has the same API as the sio except for:
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* - it can support MUCH higher baudrates; up to:
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* o 921600 for RS232 and 2000000 for RS422/485 at 48MHz
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* o 230400 at 12MHz
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* so .. 8U232AM's baudrate setting codes are different
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* - it has a two byte status code.
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* - it returns characters every 16ms (the FTDI does it every 40ms)
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*
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* the bcdDevice value is used to differentiate FT232BM and FT245BM from
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* the earlier FT8U232AM and FT8U232BM. For now, include all known VID/PID
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* combinations in both tables.
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* FIXME: perhaps bcdDevice can also identify 12MHz FT8U232AM devices,
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* but I don't know if those ever went into mass production. [Ian Abbott]
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*/
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static struct usb_device_id id_table_combined [] = {
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{ USB_DEVICE(FTDI_VID, FTDI_AMC232_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_CANUSB_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_ACTZWAVE_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_IRTRANS_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_IPLUS_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_DMX4ALL) },
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{ USB_DEVICE(FTDI_VID, FTDI_SIO_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_8U232AM_ALT_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_8U2232C_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_MICRO_CHAMELEON_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_RELAIS_PID) },
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{ USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_IOBOARD_PID) },
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{ USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_MINI_IOBOARD_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_XF_632_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_XF_634_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_XF_547_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_XF_633_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_XF_631_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_XF_635_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_XF_640_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_XF_642_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_DSS20_PID) },
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{ USB_DEVICE(FTDI_NF_RIC_VID, FTDI_NF_RIC_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_VNHCPCUSB_D_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_0_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_1_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_2_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_3_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_4_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_5_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_PERLE_ULTRAPORT_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_PIEGROUP_PID) },
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{ USB_DEVICE(FTDI_VID, FTDI_TNC_X_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2101_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2102_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2103_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2104_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2106_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_1_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_2_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_1_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_2_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_1_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_2_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_1_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_2_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_3_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_4_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_1_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_2_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_3_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_4_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_1_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_2_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_3_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_4_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_1_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_2_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_3_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_4_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_5_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_6_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_7_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_8_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_1_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_2_PID) },
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{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_3_PID) },
|
||
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_4_PID) },
|
||
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_5_PID) },
|
||
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_6_PID) },
|
||
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_7_PID) },
|
||
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_8_PID) },
|
||
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_1_PID) },
|
||
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_2_PID) },
|
||
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_3_PID) },
|
||
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_4_PID) },
|
||
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_5_PID) },
|
||
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_6_PID) },
|
||
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_7_PID) },
|
||
{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_8_PID) },
|
||
{ USB_DEVICE(IDTECH_VID, IDTECH_IDT1221U_PID) },
|
||
{ USB_DEVICE(OCT_VID, OCT_US101_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_HE_TIRA1_PID),
|
||
.driver_info = (kernel_ulong_t)&ftdi_HE_TIRA1_quirk },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_USB_UIRT_PID),
|
||
.driver_info = (kernel_ulong_t)&ftdi_USB_UIRT_quirk },
|
||
{ USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_1) },
|
||
{ USB_DEVICE(FTDI_VID, PROTEGO_R2X0) },
|
||
{ USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_3) },
|
||
{ USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_4) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E808_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E809_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80A_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80B_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80C_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80D_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80E_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80F_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E888_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E889_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88A_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88B_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88C_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88D_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88E_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88F_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_ELV_UO100_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_ELV_UM100_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_ELV_UR100_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_ELV_ALC8500_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_PYRAMID_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1000PC_PID) },
|
||
/*
|
||
* These will probably use user-space drivers. Uncomment them if
|
||
* you need them or use the user-specified vendor/product module
|
||
* parameters (see ftdi_sio.h for the numbers). Make a fuss if
|
||
* you think the driver should recognize any of them by default.
|
||
*/
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_CLI7000_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_PPS7330_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_TFM100_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_UDF77_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_UIO88_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_UAD8_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_UDA7_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_USI2_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_T1100_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_PCD200_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_ULA200_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_CSI8_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1000DL_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_PCK100_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_RFP500_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_FS20SIG_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_WS300PC_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1300PC_PID) }, */
|
||
/* { USB_DEVICE(FTDI_VID, FTDI_ELV_WS500_PID) }, */
|
||
{ USB_DEVICE(FTDI_VID, LINX_SDMUSBQSS_PID) },
|
||
{ USB_DEVICE(FTDI_VID, LINX_MASTERDEVEL2_PID) },
|
||
{ USB_DEVICE(FTDI_VID, LINX_FUTURE_0_PID) },
|
||
{ USB_DEVICE(FTDI_VID, LINX_FUTURE_1_PID) },
|
||
{ USB_DEVICE(FTDI_VID, LINX_FUTURE_2_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_CCSICDU20_0_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_CCSICDU40_1_PID) },
|
||
{ USB_DEVICE(FTDI_VID, INSIDE_ACCESSO) },
|
||
{ USB_DEVICE(INTREPID_VID, INTREPID_VALUECAN_PID) },
|
||
{ USB_DEVICE(INTREPID_VID, INTREPID_NEOVI_PID) },
|
||
{ USB_DEVICE(FALCOM_VID, FALCOM_TWIST_PID) },
|
||
{ USB_DEVICE(FALCOM_VID, FALCOM_SAMBA_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_SUUNTO_SPORTS_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_RM_CANVIEW_PID) },
|
||
{ USB_DEVICE(BANDB_VID, BANDB_USOTL4_PID) },
|
||
{ USB_DEVICE(BANDB_VID, BANDB_USTL4_PID) },
|
||
{ USB_DEVICE(BANDB_VID, BANDB_USO9ML2_PID) },
|
||
{ USB_DEVICE(FTDI_VID, EVER_ECO_PRO_CDS) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_0_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_1_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_2_PID) },
|
||
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_0_PID) },
|
||
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_1_PID) },
|
||
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_2_PID) },
|
||
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_3_PID) },
|
||
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_4_PID) },
|
||
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_5_PID) },
|
||
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_6_PID) },
|
||
{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_7_PID) },
|
||
{ USB_DEVICE(MOBILITY_VID, MOBILITY_USB_SERIAL_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_ACTIVE_ROBOTS_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_KW_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_YS_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_Y6_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_Y8_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_IC_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_DB9_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_RS232_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_MHAM_Y9_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_VCP_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_D2XX_PID) },
|
||
{ USB_DEVICE(EVOLUTION_VID, EVOLUTION_ER1_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_ARTEMIS_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16C_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HR_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HRC_PID) },
|
||
{ USB_DEVICE(KOBIL_VID, KOBIL_CONV_B1_PID) },
|
||
{ USB_DEVICE(KOBIL_VID, KOBIL_CONV_KAAN_PID) },
|
||
{ USB_DEVICE(POSIFLEX_VID, POSIFLEX_PP7000_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_TTUSB_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_ECLO_COM_1WIRE_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_777_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_8900F_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_PCDJ_DAC2_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_RRCIRKITS_LOCOBUFFER_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_ASK_RDR400_PID) },
|
||
{ USB_DEVICE(ICOM_ID1_VID, ICOM_ID1_PID) },
|
||
{ USB_DEVICE(PAPOUCH_VID, PAPOUCH_TMU_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_ACG_HFDUAL_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_YEI_SERVOCENTER31_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_THORLABS_PID) },
|
||
{ USB_DEVICE(TESTO_VID, TESTO_USB_INTERFACE_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_GAMMA_SCOUT_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13M_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13S_PID) },
|
||
{ USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13U_PID) },
|
||
{ USB_DEVICE(ELEKTOR_VID, ELEKTOR_FT323R_PID) },
|
||
{ }, /* Optional parameter entry */
|
||
{ } /* Terminating entry */
|
||
};
|
||
|
||
MODULE_DEVICE_TABLE (usb, id_table_combined);
|
||
|
||
static struct usb_driver ftdi_driver = {
|
||
.name = "ftdi_sio",
|
||
.probe = usb_serial_probe,
|
||
.disconnect = usb_serial_disconnect,
|
||
.id_table = id_table_combined,
|
||
.no_dynamic_id = 1,
|
||
};
|
||
|
||
static const char *ftdi_chip_name[] = {
|
||
[SIO] = "SIO", /* the serial part of FT8U100AX */
|
||
[FT8U232AM] = "FT8U232AM",
|
||
[FT232BM] = "FT232BM",
|
||
[FT2232C] = "FT2232C",
|
||
};
|
||
|
||
|
||
/* Constants for read urb and write urb */
|
||
#define BUFSZ 512
|
||
#define PKTSZ 64
|
||
|
||
/* rx_flags */
|
||
#define THROTTLED 0x01
|
||
#define ACTUALLY_THROTTLED 0x02
|
||
|
||
struct ftdi_private {
|
||
ftdi_chip_type_t chip_type;
|
||
/* type of the device, either SIO or FT8U232AM */
|
||
int baud_base; /* baud base clock for divisor setting */
|
||
int custom_divisor; /* custom_divisor kludge, this is for baud_base (different from what goes to the chip!) */
|
||
__u16 last_set_data_urb_value ;
|
||
/* the last data state set - needed for doing a break */
|
||
int write_offset; /* This is the offset in the usb data block to write the serial data -
|
||
* it is different between devices
|
||
*/
|
||
int flags; /* some ASYNC_xxxx flags are supported */
|
||
unsigned long last_dtr_rts; /* saved modem control outputs */
|
||
wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
|
||
char prev_status, diff_status; /* Used for TIOCMIWAIT */
|
||
__u8 rx_flags; /* receive state flags (throttling) */
|
||
spinlock_t rx_lock; /* spinlock for receive state */
|
||
struct work_struct rx_work;
|
||
int rx_processed;
|
||
unsigned long rx_bytes;
|
||
|
||
__u16 interface; /* FT2232C port interface (0 for FT232/245) */
|
||
|
||
int force_baud; /* if non-zero, force the baud rate to this value */
|
||
int force_rtscts; /* if non-zero, force RTS-CTS to always be enabled */
|
||
|
||
spinlock_t tx_lock; /* spinlock for transmit state */
|
||
unsigned long tx_bytes;
|
||
unsigned long tx_outstanding_bytes;
|
||
unsigned long tx_outstanding_urbs;
|
||
};
|
||
|
||
/* Used for TIOCMIWAIT */
|
||
#define FTDI_STATUS_B0_MASK (FTDI_RS0_CTS | FTDI_RS0_DSR | FTDI_RS0_RI | FTDI_RS0_RLSD)
|
||
#define FTDI_STATUS_B1_MASK (FTDI_RS_BI)
|
||
/* End TIOCMIWAIT */
|
||
|
||
#define FTDI_IMPL_ASYNC_FLAGS = ( ASYNC_SPD_HI | ASYNC_SPD_VHI \
|
||
ASYNC_SPD_CUST | ASYNC_SPD_SHI | ASYNC_SPD_WARP )
|
||
|
||
/* function prototypes for a FTDI serial converter */
|
||
static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id);
|
||
static int ftdi_sio_attach (struct usb_serial *serial);
|
||
static void ftdi_shutdown (struct usb_serial *serial);
|
||
static int ftdi_open (struct usb_serial_port *port, struct file *filp);
|
||
static void ftdi_close (struct usb_serial_port *port, struct file *filp);
|
||
static int ftdi_write (struct usb_serial_port *port, const unsigned char *buf, int count);
|
||
static int ftdi_write_room (struct usb_serial_port *port);
|
||
static int ftdi_chars_in_buffer (struct usb_serial_port *port);
|
||
static void ftdi_write_bulk_callback (struct urb *urb);
|
||
static void ftdi_read_bulk_callback (struct urb *urb);
|
||
static void ftdi_process_read (void *param);
|
||
static void ftdi_set_termios (struct usb_serial_port *port, struct termios * old);
|
||
static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file);
|
||
static int ftdi_tiocmset (struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear);
|
||
static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
|
||
static void ftdi_break_ctl (struct usb_serial_port *port, int break_state );
|
||
static void ftdi_throttle (struct usb_serial_port *port);
|
||
static void ftdi_unthrottle (struct usb_serial_port *port);
|
||
|
||
static unsigned short int ftdi_232am_baud_base_to_divisor (int baud, int base);
|
||
static unsigned short int ftdi_232am_baud_to_divisor (int baud);
|
||
static __u32 ftdi_232bm_baud_base_to_divisor (int baud, int base);
|
||
static __u32 ftdi_232bm_baud_to_divisor (int baud);
|
||
|
||
static struct usb_serial_driver ftdi_sio_device = {
|
||
.driver = {
|
||
.owner = THIS_MODULE,
|
||
.name = "ftdi_sio",
|
||
},
|
||
.description = "FTDI USB Serial Device",
|
||
.id_table = id_table_combined,
|
||
.num_interrupt_in = 0,
|
||
.num_bulk_in = 1,
|
||
.num_bulk_out = 1,
|
||
.num_ports = 1,
|
||
.probe = ftdi_sio_probe,
|
||
.open = ftdi_open,
|
||
.close = ftdi_close,
|
||
.throttle = ftdi_throttle,
|
||
.unthrottle = ftdi_unthrottle,
|
||
.write = ftdi_write,
|
||
.write_room = ftdi_write_room,
|
||
.chars_in_buffer = ftdi_chars_in_buffer,
|
||
.read_bulk_callback = ftdi_read_bulk_callback,
|
||
.write_bulk_callback = ftdi_write_bulk_callback,
|
||
.tiocmget = ftdi_tiocmget,
|
||
.tiocmset = ftdi_tiocmset,
|
||
.ioctl = ftdi_ioctl,
|
||
.set_termios = ftdi_set_termios,
|
||
.break_ctl = ftdi_break_ctl,
|
||
.attach = ftdi_sio_attach,
|
||
.shutdown = ftdi_shutdown,
|
||
};
|
||
|
||
|
||
#define WDR_TIMEOUT 5000 /* default urb timeout */
|
||
#define WDR_SHORT_TIMEOUT 1000 /* shorter urb timeout */
|
||
|
||
/* High and low are for DTR, RTS etc etc */
|
||
#define HIGH 1
|
||
#define LOW 0
|
||
|
||
/* number of outstanding urbs to prevent userspace DoS from happening */
|
||
#define URB_UPPER_LIMIT 42
|
||
|
||
/*
|
||
* ***************************************************************************
|
||
* Utlity functions
|
||
* ***************************************************************************
|
||
*/
|
||
|
||
static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base)
|
||
{
|
||
unsigned short int divisor;
|
||
int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
|
||
if ((divisor3 & 0x7) == 7) divisor3 ++; // round x.7/8 up to x+1
|
||
divisor = divisor3 >> 3;
|
||
divisor3 &= 0x7;
|
||
if (divisor3 == 1) divisor |= 0xc000; else // 0.125
|
||
if (divisor3 >= 4) divisor |= 0x4000; else // 0.5
|
||
if (divisor3 != 0) divisor |= 0x8000; // 0.25
|
||
if (divisor == 1) divisor = 0; /* special case for maximum baud rate */
|
||
return divisor;
|
||
}
|
||
|
||
static unsigned short int ftdi_232am_baud_to_divisor(int baud)
|
||
{
|
||
return(ftdi_232am_baud_base_to_divisor(baud, 48000000));
|
||
}
|
||
|
||
static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base)
|
||
{
|
||
static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
|
||
__u32 divisor;
|
||
int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
|
||
divisor = divisor3 >> 3;
|
||
divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
|
||
/* Deal with special cases for highest baud rates. */
|
||
if (divisor == 1) divisor = 0; else // 1.0
|
||
if (divisor == 0x4001) divisor = 1; // 1.5
|
||
return divisor;
|
||
}
|
||
|
||
static __u32 ftdi_232bm_baud_to_divisor(int baud)
|
||
{
|
||
return(ftdi_232bm_baud_base_to_divisor(baud, 48000000));
|
||
}
|
||
|
||
#define set_mctrl(port, set) update_mctrl((port), (set), 0)
|
||
#define clear_mctrl(port, clear) update_mctrl((port), 0, (clear))
|
||
|
||
static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned int clear)
|
||
{
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
char *buf;
|
||
unsigned urb_value;
|
||
int rv;
|
||
|
||
if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
|
||
dbg("%s - DTR|RTS not being set|cleared", __FUNCTION__);
|
||
return 0; /* no change */
|
||
}
|
||
|
||
buf = kmalloc(1, GFP_NOIO);
|
||
if (!buf) {
|
||
return -ENOMEM;
|
||
}
|
||
|
||
clear &= ~set; /* 'set' takes precedence over 'clear' */
|
||
urb_value = 0;
|
||
if (clear & TIOCM_DTR)
|
||
urb_value |= FTDI_SIO_SET_DTR_LOW;
|
||
if (clear & TIOCM_RTS)
|
||
urb_value |= FTDI_SIO_SET_RTS_LOW;
|
||
if (set & TIOCM_DTR)
|
||
urb_value |= FTDI_SIO_SET_DTR_HIGH;
|
||
if (set & TIOCM_RTS)
|
||
urb_value |= FTDI_SIO_SET_RTS_HIGH;
|
||
rv = usb_control_msg(port->serial->dev,
|
||
usb_sndctrlpipe(port->serial->dev, 0),
|
||
FTDI_SIO_SET_MODEM_CTRL_REQUEST,
|
||
FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
|
||
urb_value, priv->interface,
|
||
buf, 0, WDR_TIMEOUT);
|
||
|
||
kfree(buf);
|
||
if (rv < 0) {
|
||
err("%s Error from MODEM_CTRL urb: DTR %s, RTS %s",
|
||
__FUNCTION__,
|
||
(set & TIOCM_DTR) ? "HIGH" :
|
||
(clear & TIOCM_DTR) ? "LOW" : "unchanged",
|
||
(set & TIOCM_RTS) ? "HIGH" :
|
||
(clear & TIOCM_RTS) ? "LOW" : "unchanged");
|
||
} else {
|
||
dbg("%s - DTR %s, RTS %s", __FUNCTION__,
|
||
(set & TIOCM_DTR) ? "HIGH" :
|
||
(clear & TIOCM_DTR) ? "LOW" : "unchanged",
|
||
(set & TIOCM_RTS) ? "HIGH" :
|
||
(clear & TIOCM_RTS) ? "LOW" : "unchanged");
|
||
priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set;
|
||
}
|
||
return rv;
|
||
}
|
||
|
||
|
||
static __u32 get_ftdi_divisor(struct usb_serial_port * port);
|
||
|
||
|
||
static int change_speed(struct usb_serial_port *port)
|
||
{
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
char *buf;
|
||
__u16 urb_value;
|
||
__u16 urb_index;
|
||
__u32 urb_index_value;
|
||
int rv;
|
||
|
||
buf = kmalloc(1, GFP_NOIO);
|
||
if (!buf)
|
||
return -ENOMEM;
|
||
|
||
urb_index_value = get_ftdi_divisor(port);
|
||
urb_value = (__u16)urb_index_value;
|
||
urb_index = (__u16)(urb_index_value >> 16);
|
||
if (priv->interface) { /* FT2232C */
|
||
urb_index = (__u16)((urb_index << 8) | priv->interface);
|
||
}
|
||
|
||
rv = usb_control_msg(port->serial->dev,
|
||
usb_sndctrlpipe(port->serial->dev, 0),
|
||
FTDI_SIO_SET_BAUDRATE_REQUEST,
|
||
FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE,
|
||
urb_value, urb_index,
|
||
buf, 0, WDR_SHORT_TIMEOUT);
|
||
|
||
kfree(buf);
|
||
return rv;
|
||
}
|
||
|
||
|
||
static __u32 get_ftdi_divisor(struct usb_serial_port * port)
|
||
{ /* get_ftdi_divisor */
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
__u32 div_value = 0;
|
||
int div_okay = 1;
|
||
int baud;
|
||
|
||
/*
|
||
* The logic involved in setting the baudrate can be cleanly split in 3 steps.
|
||
* Obtaining the actual baud rate is a little tricky since unix traditionally
|
||
* somehow ignored the possibility to set non-standard baud rates.
|
||
* 1. Standard baud rates are set in tty->termios->c_cflag
|
||
* 2. If these are not enough, you can set any speed using alt_speed as follows:
|
||
* - set tty->termios->c_cflag speed to B38400
|
||
* - set your real speed in tty->alt_speed; it gets ignored when
|
||
* alt_speed==0, (or)
|
||
* - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
|
||
* flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP], this just
|
||
* sets alt_speed to (HI: 57600, VHI: 115200, SHI: 230400, WARP: 460800)
|
||
* ** Steps 1, 2 are done courtesy of tty_get_baud_rate
|
||
* 3. You can also set baud rate by setting custom divisor as follows
|
||
* - set tty->termios->c_cflag speed to B38400
|
||
* - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
|
||
* o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST
|
||
* o custom_divisor set to baud_base / your_new_baudrate
|
||
* ** Step 3 is done courtesy of code borrowed from serial.c - I should really
|
||
* spend some time and separate+move this common code to serial.c, it is
|
||
* replicated in nearly every serial driver you see.
|
||
*/
|
||
|
||
/* 1. Get the baud rate from the tty settings, this observes alt_speed hack */
|
||
|
||
baud = tty_get_baud_rate(port->tty);
|
||
dbg("%s - tty_get_baud_rate reports speed %d", __FUNCTION__, baud);
|
||
|
||
/* 2. Observe async-compatible custom_divisor hack, update baudrate if needed */
|
||
|
||
if (baud == 38400 &&
|
||
((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
|
||
(priv->custom_divisor)) {
|
||
baud = priv->baud_base / priv->custom_divisor;
|
||
dbg("%s - custom divisor %d sets baud rate to %d", __FUNCTION__, priv->custom_divisor, baud);
|
||
}
|
||
|
||
/* 3. Convert baudrate to device-specific divisor */
|
||
|
||
if (!baud) baud = 9600;
|
||
switch(priv->chip_type) {
|
||
case SIO: /* SIO chip */
|
||
switch(baud) {
|
||
case 300: div_value = ftdi_sio_b300; break;
|
||
case 600: div_value = ftdi_sio_b600; break;
|
||
case 1200: div_value = ftdi_sio_b1200; break;
|
||
case 2400: div_value = ftdi_sio_b2400; break;
|
||
case 4800: div_value = ftdi_sio_b4800; break;
|
||
case 9600: div_value = ftdi_sio_b9600; break;
|
||
case 19200: div_value = ftdi_sio_b19200; break;
|
||
case 38400: div_value = ftdi_sio_b38400; break;
|
||
case 57600: div_value = ftdi_sio_b57600; break;
|
||
case 115200: div_value = ftdi_sio_b115200; break;
|
||
} /* baud */
|
||
if (div_value == 0) {
|
||
dbg("%s - Baudrate (%d) requested is not supported", __FUNCTION__, baud);
|
||
div_value = ftdi_sio_b9600;
|
||
div_okay = 0;
|
||
}
|
||
break;
|
||
case FT8U232AM: /* 8U232AM chip */
|
||
if (baud <= 3000000) {
|
||
div_value = ftdi_232am_baud_to_divisor(baud);
|
||
} else {
|
||
dbg("%s - Baud rate too high!", __FUNCTION__);
|
||
div_value = ftdi_232am_baud_to_divisor(9600);
|
||
div_okay = 0;
|
||
}
|
||
break;
|
||
case FT232BM: /* FT232BM chip */
|
||
case FT2232C: /* FT2232C chip */
|
||
if (baud <= 3000000) {
|
||
div_value = ftdi_232bm_baud_to_divisor(baud);
|
||
} else {
|
||
dbg("%s - Baud rate too high!", __FUNCTION__);
|
||
div_value = ftdi_232bm_baud_to_divisor(9600);
|
||
div_okay = 0;
|
||
}
|
||
break;
|
||
} /* priv->chip_type */
|
||
|
||
if (div_okay) {
|
||
dbg("%s - Baud rate set to %d (divisor 0x%lX) on chip %s",
|
||
__FUNCTION__, baud, (unsigned long)div_value,
|
||
ftdi_chip_name[priv->chip_type]);
|
||
}
|
||
|
||
return(div_value);
|
||
}
|
||
|
||
|
||
static int get_serial_info(struct usb_serial_port * port, struct serial_struct __user * retinfo)
|
||
{
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
struct serial_struct tmp;
|
||
|
||
if (!retinfo)
|
||
return -EFAULT;
|
||
memset(&tmp, 0, sizeof(tmp));
|
||
tmp.flags = priv->flags;
|
||
tmp.baud_base = priv->baud_base;
|
||
tmp.custom_divisor = priv->custom_divisor;
|
||
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
|
||
return -EFAULT;
|
||
return 0;
|
||
} /* get_serial_info */
|
||
|
||
|
||
static int set_serial_info(struct usb_serial_port * port, struct serial_struct __user * newinfo)
|
||
{ /* set_serial_info */
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
struct serial_struct new_serial;
|
||
struct ftdi_private old_priv;
|
||
|
||
if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
|
||
return -EFAULT;
|
||
old_priv = * priv;
|
||
|
||
/* Do error checking and permission checking */
|
||
|
||
if (!capable(CAP_SYS_ADMIN)) {
|
||
if (((new_serial.flags & ~ASYNC_USR_MASK) !=
|
||
(priv->flags & ~ASYNC_USR_MASK)))
|
||
return -EPERM;
|
||
priv->flags = ((priv->flags & ~ASYNC_USR_MASK) |
|
||
(new_serial.flags & ASYNC_USR_MASK));
|
||
priv->custom_divisor = new_serial.custom_divisor;
|
||
goto check_and_exit;
|
||
}
|
||
|
||
if ((new_serial.baud_base != priv->baud_base) &&
|
||
(new_serial.baud_base < 9600))
|
||
return -EINVAL;
|
||
|
||
/* Make the changes - these are privileged changes! */
|
||
|
||
priv->flags = ((priv->flags & ~ASYNC_FLAGS) |
|
||
(new_serial.flags & ASYNC_FLAGS));
|
||
priv->custom_divisor = new_serial.custom_divisor;
|
||
|
||
port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
|
||
|
||
check_and_exit:
|
||
if ((old_priv.flags & ASYNC_SPD_MASK) !=
|
||
(priv->flags & ASYNC_SPD_MASK)) {
|
||
if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
|
||
port->tty->alt_speed = 57600;
|
||
else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
|
||
port->tty->alt_speed = 115200;
|
||
else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
|
||
port->tty->alt_speed = 230400;
|
||
else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
|
||
port->tty->alt_speed = 460800;
|
||
else
|
||
port->tty->alt_speed = 0;
|
||
}
|
||
if (((old_priv.flags & ASYNC_SPD_MASK) !=
|
||
(priv->flags & ASYNC_SPD_MASK)) ||
|
||
(((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
|
||
(old_priv.custom_divisor != priv->custom_divisor))) {
|
||
change_speed(port);
|
||
}
|
||
|
||
return (0);
|
||
|
||
} /* set_serial_info */
|
||
|
||
|
||
/* Determine type of FTDI chip based on USB config and descriptor. */
|
||
static void ftdi_determine_type(struct usb_serial_port *port)
|
||
{
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
struct usb_serial *serial = port->serial;
|
||
struct usb_device *udev = serial->dev;
|
||
unsigned version;
|
||
unsigned interfaces;
|
||
|
||
/* Assume it is not the original SIO device for now. */
|
||
priv->baud_base = 48000000 / 2;
|
||
priv->write_offset = 0;
|
||
|
||
version = le16_to_cpu(udev->descriptor.bcdDevice);
|
||
interfaces = udev->actconfig->desc.bNumInterfaces;
|
||
dbg("%s: bcdDevice = 0x%x, bNumInterfaces = %u", __FUNCTION__,
|
||
version, interfaces);
|
||
if (interfaces > 1) {
|
||
int inter;
|
||
|
||
/* Multiple interfaces. Assume FT2232C. */
|
||
priv->chip_type = FT2232C;
|
||
/* Determine interface code. */
|
||
inter = serial->interface->altsetting->desc.bInterfaceNumber;
|
||
if (inter == 0) {
|
||
priv->interface = PIT_SIOA;
|
||
} else {
|
||
priv->interface = PIT_SIOB;
|
||
}
|
||
/* BM-type devices have a bug where bcdDevice gets set
|
||
* to 0x200 when iSerialNumber is 0. */
|
||
if (version < 0x500) {
|
||
dbg("%s: something fishy - bcdDevice too low for multi-interface device",
|
||
__FUNCTION__);
|
||
}
|
||
} else if (version < 0x200) {
|
||
/* Old device. Assume its the original SIO. */
|
||
priv->chip_type = SIO;
|
||
priv->baud_base = 12000000 / 16;
|
||
priv->write_offset = 1;
|
||
} else if (version < 0x400) {
|
||
/* Assume its an FT8U232AM (or FT8U245AM) */
|
||
/* (It might be a BM because of the iSerialNumber bug,
|
||
* but it will still work as an AM device.) */
|
||
priv->chip_type = FT8U232AM;
|
||
} else {
|
||
/* Assume its an FT232BM (or FT245BM) */
|
||
priv->chip_type = FT232BM;
|
||
}
|
||
info("Detected %s", ftdi_chip_name[priv->chip_type]);
|
||
}
|
||
|
||
|
||
/*
|
||
* ***************************************************************************
|
||
* Sysfs Attribute
|
||
* ***************************************************************************
|
||
*/
|
||
|
||
static ssize_t show_latency_timer(struct device *dev, struct device_attribute *attr, char *buf)
|
||
{
|
||
struct usb_serial_port *port = to_usb_serial_port(dev);
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
struct usb_device *udev;
|
||
unsigned short latency = 0;
|
||
int rv = 0;
|
||
|
||
udev = to_usb_device(dev);
|
||
|
||
dbg("%s",__FUNCTION__);
|
||
|
||
rv = usb_control_msg(udev,
|
||
usb_rcvctrlpipe(udev, 0),
|
||
FTDI_SIO_GET_LATENCY_TIMER_REQUEST,
|
||
FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE,
|
||
0, priv->interface,
|
||
(char*) &latency, 1, WDR_TIMEOUT);
|
||
|
||
if (rv < 0) {
|
||
dev_err(dev, "Unable to read latency timer: %i", rv);
|
||
return -EIO;
|
||
}
|
||
return sprintf(buf, "%i\n", latency);
|
||
}
|
||
|
||
/* Write a new value of the latency timer, in units of milliseconds. */
|
||
static ssize_t store_latency_timer(struct device *dev, struct device_attribute *attr, const char *valbuf,
|
||
size_t count)
|
||
{
|
||
struct usb_serial_port *port = to_usb_serial_port(dev);
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
struct usb_device *udev;
|
||
char buf[1];
|
||
int v = simple_strtoul(valbuf, NULL, 10);
|
||
int rv = 0;
|
||
|
||
udev = to_usb_device(dev);
|
||
|
||
dbg("%s: setting latency timer = %i", __FUNCTION__, v);
|
||
|
||
rv = usb_control_msg(udev,
|
||
usb_sndctrlpipe(udev, 0),
|
||
FTDI_SIO_SET_LATENCY_TIMER_REQUEST,
|
||
FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE,
|
||
v, priv->interface,
|
||
buf, 0, WDR_TIMEOUT);
|
||
|
||
if (rv < 0) {
|
||
dev_err(dev, "Unable to write latency timer: %i", rv);
|
||
return -EIO;
|
||
}
|
||
|
||
return count;
|
||
}
|
||
|
||
/* Write an event character directly to the FTDI register. The ASCII
|
||
value is in the low 8 bits, with the enable bit in the 9th bit. */
|
||
static ssize_t store_event_char(struct device *dev, struct device_attribute *attr, const char *valbuf,
|
||
size_t count)
|
||
{
|
||
struct usb_serial_port *port = to_usb_serial_port(dev);
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
struct usb_device *udev;
|
||
char buf[1];
|
||
int v = simple_strtoul(valbuf, NULL, 10);
|
||
int rv = 0;
|
||
|
||
udev = to_usb_device(dev);
|
||
|
||
dbg("%s: setting event char = %i", __FUNCTION__, v);
|
||
|
||
rv = usb_control_msg(udev,
|
||
usb_sndctrlpipe(udev, 0),
|
||
FTDI_SIO_SET_EVENT_CHAR_REQUEST,
|
||
FTDI_SIO_SET_EVENT_CHAR_REQUEST_TYPE,
|
||
v, priv->interface,
|
||
buf, 0, WDR_TIMEOUT);
|
||
|
||
if (rv < 0) {
|
||
dbg("Unable to write event character: %i", rv);
|
||
return -EIO;
|
||
}
|
||
|
||
return count;
|
||
}
|
||
|
||
static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer, store_latency_timer);
|
||
static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char);
|
||
|
||
static int create_sysfs_attrs(struct usb_serial *serial)
|
||
{
|
||
struct ftdi_private *priv;
|
||
struct usb_device *udev;
|
||
int retval = 0;
|
||
|
||
dbg("%s",__FUNCTION__);
|
||
|
||
priv = usb_get_serial_port_data(serial->port[0]);
|
||
udev = serial->dev;
|
||
|
||
/* XXX I've no idea if the original SIO supports the event_char
|
||
* sysfs parameter, so I'm playing it safe. */
|
||
if (priv->chip_type != SIO) {
|
||
dbg("sysfs attributes for %s", ftdi_chip_name[priv->chip_type]);
|
||
retval = device_create_file(&udev->dev, &dev_attr_event_char);
|
||
if ((!retval) &&
|
||
(priv->chip_type == FT232BM || priv->chip_type == FT2232C)) {
|
||
retval = device_create_file(&udev->dev,
|
||
&dev_attr_latency_timer);
|
||
}
|
||
}
|
||
return retval;
|
||
}
|
||
|
||
static void remove_sysfs_attrs(struct usb_serial *serial)
|
||
{
|
||
struct ftdi_private *priv;
|
||
struct usb_device *udev;
|
||
|
||
dbg("%s",__FUNCTION__);
|
||
|
||
priv = usb_get_serial_port_data(serial->port[0]);
|
||
udev = serial->dev;
|
||
|
||
/* XXX see create_sysfs_attrs */
|
||
if (priv->chip_type != SIO) {
|
||
device_remove_file(&udev->dev, &dev_attr_event_char);
|
||
if (priv->chip_type == FT232BM || priv->chip_type == FT2232C) {
|
||
device_remove_file(&udev->dev, &dev_attr_latency_timer);
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/*
|
||
* ***************************************************************************
|
||
* FTDI driver specific functions
|
||
* ***************************************************************************
|
||
*/
|
||
|
||
/* Probe function to check for special devices */
|
||
static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id)
|
||
{
|
||
usb_set_serial_data(serial, (void *)id->driver_info);
|
||
|
||
return (0);
|
||
}
|
||
|
||
/* attach subroutine */
|
||
static int ftdi_sio_attach (struct usb_serial *serial)
|
||
{
|
||
struct usb_serial_port *port = serial->port[0];
|
||
struct ftdi_private *priv;
|
||
struct ftdi_sio_quirk *quirk;
|
||
int retval;
|
||
|
||
dbg("%s",__FUNCTION__);
|
||
|
||
priv = kzalloc(sizeof(struct ftdi_private), GFP_KERNEL);
|
||
if (!priv){
|
||
err("%s- kmalloc(%Zd) failed.", __FUNCTION__, sizeof(struct ftdi_private));
|
||
return -ENOMEM;
|
||
}
|
||
|
||
spin_lock_init(&priv->rx_lock);
|
||
spin_lock_init(&priv->tx_lock);
|
||
init_waitqueue_head(&priv->delta_msr_wait);
|
||
/* This will push the characters through immediately rather
|
||
than queue a task to deliver them */
|
||
priv->flags = ASYNC_LOW_LATENCY;
|
||
|
||
/* Increase the size of read buffers */
|
||
kfree(port->bulk_in_buffer);
|
||
port->bulk_in_buffer = kmalloc (BUFSZ, GFP_KERNEL);
|
||
if (!port->bulk_in_buffer) {
|
||
kfree (priv);
|
||
return -ENOMEM;
|
||
}
|
||
if (port->read_urb) {
|
||
port->read_urb->transfer_buffer = port->bulk_in_buffer;
|
||
port->read_urb->transfer_buffer_length = BUFSZ;
|
||
}
|
||
|
||
INIT_WORK(&priv->rx_work, ftdi_process_read, port);
|
||
|
||
/* Free port's existing write urb and transfer buffer. */
|
||
if (port->write_urb) {
|
||
usb_free_urb (port->write_urb);
|
||
port->write_urb = NULL;
|
||
}
|
||
kfree(port->bulk_out_buffer);
|
||
port->bulk_out_buffer = NULL;
|
||
|
||
usb_set_serial_port_data(serial->port[0], priv);
|
||
|
||
ftdi_determine_type (serial->port[0]);
|
||
retval = create_sysfs_attrs(serial);
|
||
if (retval)
|
||
dev_err(&serial->dev->dev, "Error creating sysfs files, "
|
||
"continuing\n");
|
||
|
||
/* Check for device requiring special set up. */
|
||
quirk = (struct ftdi_sio_quirk *)usb_get_serial_data(serial);
|
||
if (quirk && quirk->setup) {
|
||
quirk->setup(serial);
|
||
}
|
||
|
||
return 0;
|
||
} /* ftdi_sio_attach */
|
||
|
||
|
||
/* Setup for the USB-UIRT device, which requires hardwired
|
||
* baudrate (38400 gets mapped to 312500) */
|
||
/* Called from usbserial:serial_probe */
|
||
static void ftdi_USB_UIRT_setup (struct usb_serial *serial)
|
||
{
|
||
struct ftdi_private *priv;
|
||
|
||
dbg("%s",__FUNCTION__);
|
||
|
||
priv = usb_get_serial_port_data(serial->port[0]);
|
||
priv->flags |= ASYNC_SPD_CUST;
|
||
priv->custom_divisor = 77;
|
||
priv->force_baud = B38400;
|
||
} /* ftdi_USB_UIRT_setup */
|
||
|
||
/* Setup for the HE-TIRA1 device, which requires hardwired
|
||
* baudrate (38400 gets mapped to 100000) and RTS-CTS enabled. */
|
||
static void ftdi_HE_TIRA1_setup (struct usb_serial *serial)
|
||
{
|
||
struct ftdi_private *priv;
|
||
|
||
dbg("%s",__FUNCTION__);
|
||
|
||
priv = usb_get_serial_port_data(serial->port[0]);
|
||
priv->flags |= ASYNC_SPD_CUST;
|
||
priv->custom_divisor = 240;
|
||
priv->force_baud = B38400;
|
||
priv->force_rtscts = 1;
|
||
} /* ftdi_HE_TIRA1_setup */
|
||
|
||
|
||
/* ftdi_shutdown is called from usbserial:usb_serial_disconnect
|
||
* it is called when the usb device is disconnected
|
||
*
|
||
* usbserial:usb_serial_disconnect
|
||
* calls __serial_close for each open of the port
|
||
* shutdown is called then (ie ftdi_shutdown)
|
||
*/
|
||
|
||
|
||
static void ftdi_shutdown (struct usb_serial *serial)
|
||
{ /* ftdi_shutdown */
|
||
|
||
struct usb_serial_port *port = serial->port[0];
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
|
||
dbg("%s", __FUNCTION__);
|
||
|
||
remove_sysfs_attrs(serial);
|
||
|
||
/* all open ports are closed at this point
|
||
* (by usbserial.c:__serial_close, which calls ftdi_close)
|
||
*/
|
||
|
||
if (priv) {
|
||
usb_set_serial_port_data(port, NULL);
|
||
kfree(priv);
|
||
}
|
||
} /* ftdi_shutdown */
|
||
|
||
|
||
static int ftdi_open (struct usb_serial_port *port, struct file *filp)
|
||
{ /* ftdi_open */
|
||
struct usb_device *dev = port->serial->dev;
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
unsigned long flags;
|
||
|
||
int result = 0;
|
||
char buf[1]; /* Needed for the usb_control_msg I think */
|
||
|
||
dbg("%s", __FUNCTION__);
|
||
|
||
spin_lock_irqsave(&priv->tx_lock, flags);
|
||
priv->tx_bytes = 0;
|
||
spin_unlock_irqrestore(&priv->tx_lock, flags);
|
||
spin_lock_irqsave(&priv->rx_lock, flags);
|
||
priv->rx_bytes = 0;
|
||
spin_unlock_irqrestore(&priv->rx_lock, flags);
|
||
|
||
if (port->tty)
|
||
port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
|
||
|
||
/* No error checking for this (will get errors later anyway) */
|
||
/* See ftdi_sio.h for description of what is reset */
|
||
usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
||
FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE,
|
||
FTDI_SIO_RESET_SIO,
|
||
priv->interface, buf, 0, WDR_TIMEOUT);
|
||
|
||
/* Termios defaults are set by usb_serial_init. We don't change
|
||
port->tty->termios - this would loose speed settings, etc.
|
||
This is same behaviour as serial.c/rs_open() - Kuba */
|
||
|
||
/* ftdi_set_termios will send usb control messages */
|
||
if (port->tty)
|
||
ftdi_set_termios(port, NULL);
|
||
|
||
/* FIXME: Flow control might be enabled, so it should be checked -
|
||
we have no control of defaults! */
|
||
/* Turn on RTS and DTR since we are not flow controlling by default */
|
||
set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
|
||
|
||
/* Not throttled */
|
||
spin_lock_irqsave(&priv->rx_lock, flags);
|
||
priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
|
||
spin_unlock_irqrestore(&priv->rx_lock, flags);
|
||
|
||
/* Start reading from the device */
|
||
priv->rx_processed = 0;
|
||
usb_fill_bulk_urb(port->read_urb, dev,
|
||
usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress),
|
||
port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
|
||
ftdi_read_bulk_callback, port);
|
||
result = usb_submit_urb(port->read_urb, GFP_KERNEL);
|
||
if (result)
|
||
err("%s - failed submitting read urb, error %d", __FUNCTION__, result);
|
||
|
||
|
||
return result;
|
||
} /* ftdi_open */
|
||
|
||
|
||
|
||
/*
|
||
* usbserial:__serial_close only calls ftdi_close if the point is open
|
||
*
|
||
* This only gets called when it is the last close
|
||
*
|
||
*
|
||
*/
|
||
|
||
static void ftdi_close (struct usb_serial_port *port, struct file *filp)
|
||
{ /* ftdi_close */
|
||
unsigned int c_cflag = port->tty->termios->c_cflag;
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
char buf[1];
|
||
|
||
dbg("%s", __FUNCTION__);
|
||
|
||
if (c_cflag & HUPCL){
|
||
/* Disable flow control */
|
||
if (usb_control_msg(port->serial->dev,
|
||
usb_sndctrlpipe(port->serial->dev, 0),
|
||
FTDI_SIO_SET_FLOW_CTRL_REQUEST,
|
||
FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
|
||
0, priv->interface, buf, 0,
|
||
WDR_TIMEOUT) < 0) {
|
||
err("error from flowcontrol urb");
|
||
}
|
||
|
||
/* drop RTS and DTR */
|
||
clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
|
||
} /* Note change no line if hupcl is off */
|
||
|
||
/* cancel any scheduled reading */
|
||
cancel_delayed_work(&priv->rx_work);
|
||
flush_scheduled_work();
|
||
|
||
/* shutdown our bulk read */
|
||
usb_kill_urb(port->read_urb);
|
||
} /* ftdi_close */
|
||
|
||
|
||
|
||
/* The SIO requires the first byte to have:
|
||
* B0 1
|
||
* B1 0
|
||
* B2..7 length of message excluding byte 0
|
||
*
|
||
* The new devices do not require this byte
|
||
*/
|
||
static int ftdi_write (struct usb_serial_port *port,
|
||
const unsigned char *buf, int count)
|
||
{ /* ftdi_write */
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
struct urb *urb;
|
||
unsigned char *buffer;
|
||
int data_offset ; /* will be 1 for the SIO and 0 otherwise */
|
||
int status;
|
||
int transfer_size;
|
||
unsigned long flags;
|
||
|
||
dbg("%s port %d, %d bytes", __FUNCTION__, port->number, count);
|
||
|
||
if (count == 0) {
|
||
dbg("write request of 0 bytes");
|
||
return 0;
|
||
}
|
||
spin_lock_irqsave(&priv->tx_lock, flags);
|
||
if (priv->tx_outstanding_urbs > URB_UPPER_LIMIT) {
|
||
spin_unlock_irqrestore(&priv->tx_lock, flags);
|
||
dbg("%s - write limit hit\n", __FUNCTION__);
|
||
return 0;
|
||
}
|
||
spin_unlock_irqrestore(&priv->tx_lock, flags);
|
||
|
||
data_offset = priv->write_offset;
|
||
dbg("data_offset set to %d",data_offset);
|
||
|
||
/* Determine total transfer size */
|
||
transfer_size = count;
|
||
if (data_offset > 0) {
|
||
/* Original sio needs control bytes too... */
|
||
transfer_size += (data_offset *
|
||
((count + (PKTSZ - 1 - data_offset)) /
|
||
(PKTSZ - data_offset)));
|
||
}
|
||
|
||
buffer = kmalloc (transfer_size, GFP_ATOMIC);
|
||
if (!buffer) {
|
||
err("%s ran out of kernel memory for urb ...", __FUNCTION__);
|
||
return -ENOMEM;
|
||
}
|
||
|
||
urb = usb_alloc_urb(0, GFP_ATOMIC);
|
||
if (!urb) {
|
||
err("%s - no more free urbs", __FUNCTION__);
|
||
kfree (buffer);
|
||
return -ENOMEM;
|
||
}
|
||
|
||
/* Copy data */
|
||
if (data_offset > 0) {
|
||
/* Original sio requires control byte at start of each packet. */
|
||
int user_pktsz = PKTSZ - data_offset;
|
||
int todo = count;
|
||
unsigned char *first_byte = buffer;
|
||
const unsigned char *current_position = buf;
|
||
|
||
while (todo > 0) {
|
||
if (user_pktsz > todo) {
|
||
user_pktsz = todo;
|
||
}
|
||
/* Write the control byte at the front of the packet*/
|
||
*first_byte = 1 | ((user_pktsz) << 2);
|
||
/* Copy data for packet */
|
||
memcpy (first_byte + data_offset,
|
||
current_position, user_pktsz);
|
||
first_byte += user_pktsz + data_offset;
|
||
current_position += user_pktsz;
|
||
todo -= user_pktsz;
|
||
}
|
||
} else {
|
||
/* No control byte required. */
|
||
/* Copy in the data to send */
|
||
memcpy (buffer, buf, count);
|
||
}
|
||
|
||
usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, buffer);
|
||
|
||
/* fill the buffer and send it */
|
||
usb_fill_bulk_urb(urb, port->serial->dev,
|
||
usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress),
|
||
buffer, transfer_size,
|
||
ftdi_write_bulk_callback, port);
|
||
|
||
status = usb_submit_urb(urb, GFP_ATOMIC);
|
||
if (status) {
|
||
err("%s - failed submitting write urb, error %d", __FUNCTION__, status);
|
||
count = status;
|
||
kfree (buffer);
|
||
} else {
|
||
spin_lock_irqsave(&priv->tx_lock, flags);
|
||
++priv->tx_outstanding_urbs;
|
||
priv->tx_outstanding_bytes += count;
|
||
priv->tx_bytes += count;
|
||
spin_unlock_irqrestore(&priv->tx_lock, flags);
|
||
}
|
||
|
||
/* we are done with this urb, so let the host driver
|
||
* really free it when it is finished with it */
|
||
usb_free_urb (urb);
|
||
|
||
dbg("%s write returning: %d", __FUNCTION__, count);
|
||
return count;
|
||
} /* ftdi_write */
|
||
|
||
|
||
/* This function may get called when the device is closed */
|
||
|
||
static void ftdi_write_bulk_callback (struct urb *urb)
|
||
{
|
||
unsigned long flags;
|
||
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
|
||
struct ftdi_private *priv;
|
||
int data_offset; /* will be 1 for the SIO and 0 otherwise */
|
||
unsigned long countback;
|
||
|
||
/* free up the transfer buffer, as usb_free_urb() does not do this */
|
||
kfree (urb->transfer_buffer);
|
||
|
||
dbg("%s - port %d", __FUNCTION__, port->number);
|
||
|
||
if (urb->status) {
|
||
dbg("nonzero write bulk status received: %d", urb->status);
|
||
return;
|
||
}
|
||
|
||
priv = usb_get_serial_port_data(port);
|
||
if (!priv) {
|
||
dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
|
||
return;
|
||
}
|
||
/* account for transferred data */
|
||
countback = urb->actual_length;
|
||
data_offset = priv->write_offset;
|
||
if (data_offset > 0) {
|
||
/* Subtract the control bytes */
|
||
countback -= (data_offset * ((countback + (PKTSZ - 1)) / PKTSZ));
|
||
}
|
||
spin_lock_irqsave(&priv->tx_lock, flags);
|
||
--priv->tx_outstanding_urbs;
|
||
priv->tx_outstanding_bytes -= countback;
|
||
spin_unlock_irqrestore(&priv->tx_lock, flags);
|
||
|
||
usb_serial_port_softint(port);
|
||
} /* ftdi_write_bulk_callback */
|
||
|
||
|
||
static int ftdi_write_room( struct usb_serial_port *port )
|
||
{
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
int room;
|
||
unsigned long flags;
|
||
|
||
dbg("%s - port %d", __FUNCTION__, port->number);
|
||
|
||
spin_lock_irqsave(&priv->tx_lock, flags);
|
||
if (priv->tx_outstanding_urbs < URB_UPPER_LIMIT) {
|
||
/*
|
||
* We really can take anything the user throws at us
|
||
* but let's pick a nice big number to tell the tty
|
||
* layer that we have lots of free space
|
||
*/
|
||
room = 2048;
|
||
} else {
|
||
room = 0;
|
||
}
|
||
spin_unlock_irqrestore(&priv->tx_lock, flags);
|
||
return room;
|
||
} /* ftdi_write_room */
|
||
|
||
|
||
static int ftdi_chars_in_buffer (struct usb_serial_port *port)
|
||
{ /* ftdi_chars_in_buffer */
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
int buffered;
|
||
unsigned long flags;
|
||
|
||
dbg("%s - port %d", __FUNCTION__, port->number);
|
||
|
||
spin_lock_irqsave(&priv->tx_lock, flags);
|
||
buffered = (int)priv->tx_outstanding_bytes;
|
||
spin_unlock_irqrestore(&priv->tx_lock, flags);
|
||
if (buffered < 0) {
|
||
err("%s outstanding tx bytes is negative!", __FUNCTION__);
|
||
buffered = 0;
|
||
}
|
||
return buffered;
|
||
} /* ftdi_chars_in_buffer */
|
||
|
||
|
||
|
||
static void ftdi_read_bulk_callback (struct urb *urb)
|
||
{ /* ftdi_read_bulk_callback */
|
||
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
|
||
struct tty_struct *tty;
|
||
struct ftdi_private *priv;
|
||
unsigned long countread;
|
||
unsigned long flags;
|
||
|
||
if (urb->number_of_packets > 0) {
|
||
err("%s transfer_buffer_length %d actual_length %d number of packets %d",__FUNCTION__,
|
||
urb->transfer_buffer_length, urb->actual_length, urb->number_of_packets );
|
||
err("%s transfer_flags %x ", __FUNCTION__,urb->transfer_flags );
|
||
}
|
||
|
||
dbg("%s - port %d", __FUNCTION__, port->number);
|
||
|
||
if (port->open_count <= 0)
|
||
return;
|
||
|
||
tty = port->tty;
|
||
if (!tty) {
|
||
dbg("%s - bad tty pointer - exiting",__FUNCTION__);
|
||
return;
|
||
}
|
||
|
||
priv = usb_get_serial_port_data(port);
|
||
if (!priv) {
|
||
dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
|
||
return;
|
||
}
|
||
|
||
if (urb != port->read_urb) {
|
||
err("%s - Not my urb!", __FUNCTION__);
|
||
}
|
||
|
||
if (urb->status) {
|
||
/* This will happen at close every time so it is a dbg not an err */
|
||
dbg("(this is ok on close) nonzero read bulk status received: %d", urb->status);
|
||
return;
|
||
}
|
||
|
||
/* count data bytes, but not status bytes */
|
||
countread = urb->actual_length;
|
||
countread -= 2 * ((countread + (PKTSZ - 1)) / PKTSZ);
|
||
spin_lock_irqsave(&priv->rx_lock, flags);
|
||
priv->rx_bytes += countread;
|
||
spin_unlock_irqrestore(&priv->rx_lock, flags);
|
||
|
||
ftdi_process_read(port);
|
||
|
||
} /* ftdi_read_bulk_callback */
|
||
|
||
|
||
static void ftdi_process_read (void *param)
|
||
{ /* ftdi_process_read */
|
||
struct usb_serial_port *port = (struct usb_serial_port*)param;
|
||
struct urb *urb;
|
||
struct tty_struct *tty;
|
||
struct ftdi_private *priv;
|
||
char error_flag;
|
||
unsigned char *data;
|
||
|
||
int i;
|
||
int result;
|
||
int need_flip;
|
||
int packet_offset;
|
||
unsigned long flags;
|
||
|
||
dbg("%s - port %d", __FUNCTION__, port->number);
|
||
|
||
if (port->open_count <= 0)
|
||
return;
|
||
|
||
tty = port->tty;
|
||
if (!tty) {
|
||
dbg("%s - bad tty pointer - exiting",__FUNCTION__);
|
||
return;
|
||
}
|
||
|
||
priv = usb_get_serial_port_data(port);
|
||
if (!priv) {
|
||
dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
|
||
return;
|
||
}
|
||
|
||
urb = port->read_urb;
|
||
if (!urb) {
|
||
dbg("%s - bad read_urb pointer - exiting", __FUNCTION__);
|
||
return;
|
||
}
|
||
|
||
data = urb->transfer_buffer;
|
||
|
||
if (priv->rx_processed) {
|
||
dbg("%s - already processed: %d bytes, %d remain", __FUNCTION__,
|
||
priv->rx_processed,
|
||
urb->actual_length - priv->rx_processed);
|
||
} else {
|
||
/* The first two bytes of every read packet are status */
|
||
if (urb->actual_length > 2) {
|
||
usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
|
||
} else {
|
||
dbg("Status only: %03oo %03oo",data[0],data[1]);
|
||
}
|
||
}
|
||
|
||
|
||
/* TO DO -- check for hung up line and handle appropriately: */
|
||
/* send hangup */
|
||
/* See acm.c - you do a tty_hangup - eg tty_hangup(tty) */
|
||
/* if CD is dropped and the line is not CLOCAL then we should hangup */
|
||
|
||
need_flip = 0;
|
||
for (packet_offset = priv->rx_processed; packet_offset < urb->actual_length; packet_offset += PKTSZ) {
|
||
int length;
|
||
|
||
/* Compare new line status to the old one, signal if different */
|
||
/* N.B. packet may be processed more than once, but differences
|
||
* are only processed once. */
|
||
if (priv != NULL) {
|
||
char new_status = data[packet_offset+0] & FTDI_STATUS_B0_MASK;
|
||
if (new_status != priv->prev_status) {
|
||
priv->diff_status |= new_status ^ priv->prev_status;
|
||
wake_up_interruptible(&priv->delta_msr_wait);
|
||
priv->prev_status = new_status;
|
||
}
|
||
}
|
||
|
||
length = min(PKTSZ, urb->actual_length-packet_offset)-2;
|
||
if (length < 0) {
|
||
err("%s - bad packet length: %d", __FUNCTION__, length+2);
|
||
length = 0;
|
||
}
|
||
|
||
if (priv->rx_flags & THROTTLED) {
|
||
dbg("%s - throttled", __FUNCTION__);
|
||
break;
|
||
}
|
||
if (tty_buffer_request_room(tty, length) < length) {
|
||
/* break out & wait for throttling/unthrottling to happen */
|
||
dbg("%s - receive room low", __FUNCTION__);
|
||
break;
|
||
}
|
||
|
||
/* Handle errors and break */
|
||
error_flag = TTY_NORMAL;
|
||
/* Although the device uses a bitmask and hence can have multiple */
|
||
/* errors on a packet - the order here sets the priority the */
|
||
/* error is returned to the tty layer */
|
||
|
||
if ( data[packet_offset+1] & FTDI_RS_OE ) {
|
||
error_flag = TTY_OVERRUN;
|
||
dbg("OVERRRUN error");
|
||
}
|
||
if ( data[packet_offset+1] & FTDI_RS_BI ) {
|
||
error_flag = TTY_BREAK;
|
||
dbg("BREAK received");
|
||
}
|
||
if ( data[packet_offset+1] & FTDI_RS_PE ) {
|
||
error_flag = TTY_PARITY;
|
||
dbg("PARITY error");
|
||
}
|
||
if ( data[packet_offset+1] & FTDI_RS_FE ) {
|
||
error_flag = TTY_FRAME;
|
||
dbg("FRAMING error");
|
||
}
|
||
if (length > 0) {
|
||
for (i = 2; i < length+2; i++) {
|
||
/* Note that the error flag is duplicated for
|
||
every character received since we don't know
|
||
which character it applied to */
|
||
tty_insert_flip_char(tty, data[packet_offset+i], error_flag);
|
||
}
|
||
need_flip = 1;
|
||
}
|
||
|
||
#ifdef NOT_CORRECT_BUT_KEEPING_IT_FOR_NOW
|
||
/* if a parity error is detected you get status packets forever
|
||
until a character is sent without a parity error.
|
||
This doesn't work well since the application receives a never
|
||
ending stream of bad data - even though new data hasn't been sent.
|
||
Therefore I (bill) have taken this out.
|
||
However - this might make sense for framing errors and so on
|
||
so I am leaving the code in for now.
|
||
*/
|
||
else {
|
||
if (error_flag != TTY_NORMAL){
|
||
dbg("error_flag is not normal");
|
||
/* In this case it is just status - if that is an error send a bad character */
|
||
if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
|
||
tty_flip_buffer_push(tty);
|
||
}
|
||
tty_insert_flip_char(tty, 0xff, error_flag);
|
||
need_flip = 1;
|
||
}
|
||
}
|
||
#endif
|
||
} /* "for(packet_offset=0..." */
|
||
|
||
/* Low latency */
|
||
if (need_flip) {
|
||
tty_flip_buffer_push(tty);
|
||
}
|
||
|
||
if (packet_offset < urb->actual_length) {
|
||
/* not completely processed - record progress */
|
||
priv->rx_processed = packet_offset;
|
||
dbg("%s - incomplete, %d bytes processed, %d remain",
|
||
__FUNCTION__, packet_offset,
|
||
urb->actual_length - packet_offset);
|
||
/* check if we were throttled while processing */
|
||
spin_lock_irqsave(&priv->rx_lock, flags);
|
||
if (priv->rx_flags & THROTTLED) {
|
||
priv->rx_flags |= ACTUALLY_THROTTLED;
|
||
spin_unlock_irqrestore(&priv->rx_lock, flags);
|
||
dbg("%s - deferring remainder until unthrottled",
|
||
__FUNCTION__);
|
||
return;
|
||
}
|
||
spin_unlock_irqrestore(&priv->rx_lock, flags);
|
||
/* if the port is closed stop trying to read */
|
||
if (port->open_count > 0){
|
||
/* delay processing of remainder */
|
||
schedule_delayed_work(&priv->rx_work, 1);
|
||
} else {
|
||
dbg("%s - port is closed", __FUNCTION__);
|
||
}
|
||
return;
|
||
}
|
||
|
||
/* urb is completely processed */
|
||
priv->rx_processed = 0;
|
||
|
||
/* if the port is closed stop trying to read */
|
||
if (port->open_count > 0){
|
||
/* Continue trying to always read */
|
||
usb_fill_bulk_urb(port->read_urb, port->serial->dev,
|
||
usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress),
|
||
port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
|
||
ftdi_read_bulk_callback, port);
|
||
|
||
result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
|
||
if (result)
|
||
err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
|
||
}
|
||
|
||
return;
|
||
} /* ftdi_process_read */
|
||
|
||
|
||
static void ftdi_break_ctl( struct usb_serial_port *port, int break_state )
|
||
{
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
__u16 urb_value = 0;
|
||
char buf[1];
|
||
|
||
/* break_state = -1 to turn on break, and 0 to turn off break */
|
||
/* see drivers/char/tty_io.c to see it used */
|
||
/* last_set_data_urb_value NEVER has the break bit set in it */
|
||
|
||
if (break_state) {
|
||
urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK;
|
||
} else {
|
||
urb_value = priv->last_set_data_urb_value;
|
||
}
|
||
|
||
|
||
if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0),
|
||
FTDI_SIO_SET_DATA_REQUEST,
|
||
FTDI_SIO_SET_DATA_REQUEST_TYPE,
|
||
urb_value , priv->interface,
|
||
buf, 0, WDR_TIMEOUT) < 0) {
|
||
err("%s FAILED to enable/disable break state (state was %d)", __FUNCTION__,break_state);
|
||
}
|
||
|
||
dbg("%s break state is %d - urb is %d", __FUNCTION__,break_state, urb_value);
|
||
|
||
}
|
||
|
||
|
||
/* old_termios contains the original termios settings and tty->termios contains
|
||
* the new setting to be used
|
||
* WARNING: set_termios calls this with old_termios in kernel space
|
||
*/
|
||
|
||
static void ftdi_set_termios (struct usb_serial_port *port, struct termios *old_termios)
|
||
{ /* ftdi_termios */
|
||
struct usb_device *dev = port->serial->dev;
|
||
unsigned int cflag = port->tty->termios->c_cflag;
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
__u16 urb_value; /* will hold the new flags */
|
||
char buf[1]; /* Perhaps I should dynamically alloc this? */
|
||
|
||
// Added for xon/xoff support
|
||
unsigned int iflag = port->tty->termios->c_iflag;
|
||
unsigned char vstop;
|
||
unsigned char vstart;
|
||
|
||
dbg("%s", __FUNCTION__);
|
||
|
||
/* Force baud rate if this device requires it, unless it is set to B0. */
|
||
if (priv->force_baud && ((port->tty->termios->c_cflag & CBAUD) != B0)) {
|
||
dbg("%s: forcing baud rate for this device", __FUNCTION__);
|
||
port->tty->termios->c_cflag &= ~CBAUD;
|
||
port->tty->termios->c_cflag |= priv->force_baud;
|
||
}
|
||
|
||
/* Force RTS-CTS if this device requires it. */
|
||
if (priv->force_rtscts) {
|
||
dbg("%s: forcing rtscts for this device", __FUNCTION__);
|
||
port->tty->termios->c_cflag |= CRTSCTS;
|
||
}
|
||
|
||
cflag = port->tty->termios->c_cflag;
|
||
|
||
/* FIXME -For this cut I don't care if the line is really changing or
|
||
not - so just do the change regardless - should be able to
|
||
compare old_termios and tty->termios */
|
||
/* NOTE These routines can get interrupted by
|
||
ftdi_sio_read_bulk_callback - need to examine what this
|
||
means - don't see any problems yet */
|
||
|
||
/* Set number of data bits, parity, stop bits */
|
||
|
||
urb_value = 0;
|
||
urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 :
|
||
FTDI_SIO_SET_DATA_STOP_BITS_1);
|
||
urb_value |= (cflag & PARENB ?
|
||
(cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD :
|
||
FTDI_SIO_SET_DATA_PARITY_EVEN) :
|
||
FTDI_SIO_SET_DATA_PARITY_NONE);
|
||
if (cflag & CSIZE) {
|
||
switch (cflag & CSIZE) {
|
||
case CS5: urb_value |= 5; dbg("Setting CS5"); break;
|
||
case CS6: urb_value |= 6; dbg("Setting CS6"); break;
|
||
case CS7: urb_value |= 7; dbg("Setting CS7"); break;
|
||
case CS8: urb_value |= 8; dbg("Setting CS8"); break;
|
||
default:
|
||
err("CSIZE was set but not CS5-CS8");
|
||
}
|
||
}
|
||
|
||
/* This is needed by the break command since it uses the same command - but is
|
||
* or'ed with this value */
|
||
priv->last_set_data_urb_value = urb_value;
|
||
|
||
if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
||
FTDI_SIO_SET_DATA_REQUEST,
|
||
FTDI_SIO_SET_DATA_REQUEST_TYPE,
|
||
urb_value , priv->interface,
|
||
buf, 0, WDR_SHORT_TIMEOUT) < 0) {
|
||
err("%s FAILED to set databits/stopbits/parity", __FUNCTION__);
|
||
}
|
||
|
||
/* Now do the baudrate */
|
||
if ((cflag & CBAUD) == B0 ) {
|
||
/* Disable flow control */
|
||
if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
||
FTDI_SIO_SET_FLOW_CTRL_REQUEST,
|
||
FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
|
||
0, priv->interface,
|
||
buf, 0, WDR_TIMEOUT) < 0) {
|
||
err("%s error from disable flowcontrol urb", __FUNCTION__);
|
||
}
|
||
/* Drop RTS and DTR */
|
||
clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
|
||
} else {
|
||
/* set the baudrate determined before */
|
||
if (change_speed(port)) {
|
||
err("%s urb failed to set baudrate", __FUNCTION__);
|
||
}
|
||
/* Ensure RTS and DTR are raised when baudrate changed from 0 */
|
||
if (!old_termios || (old_termios->c_cflag & CBAUD) == B0) {
|
||
set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
|
||
}
|
||
}
|
||
|
||
/* Set flow control */
|
||
/* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */
|
||
if (cflag & CRTSCTS) {
|
||
dbg("%s Setting to CRTSCTS flow control", __FUNCTION__);
|
||
if (usb_control_msg(dev,
|
||
usb_sndctrlpipe(dev, 0),
|
||
FTDI_SIO_SET_FLOW_CTRL_REQUEST,
|
||
FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
|
||
0 , (FTDI_SIO_RTS_CTS_HS | priv->interface),
|
||
buf, 0, WDR_TIMEOUT) < 0) {
|
||
err("urb failed to set to rts/cts flow control");
|
||
}
|
||
|
||
} else {
|
||
/*
|
||
* Xon/Xoff code
|
||
*
|
||
* Check the IXOFF status in the iflag component of the termios structure
|
||
* if IXOFF is not set, the pre-xon/xoff code is executed.
|
||
*/
|
||
if (iflag & IXOFF) {
|
||
dbg("%s request to enable xonxoff iflag=%04x",__FUNCTION__,iflag);
|
||
// Try to enable the XON/XOFF on the ftdi_sio
|
||
// Set the vstart and vstop -- could have been done up above where
|
||
// a lot of other dereferencing is done but that would be very
|
||
// inefficient as vstart and vstop are not always needed
|
||
vstart=port->tty->termios->c_cc[VSTART];
|
||
vstop=port->tty->termios->c_cc[VSTOP];
|
||
urb_value=(vstop << 8) | (vstart);
|
||
|
||
if (usb_control_msg(dev,
|
||
usb_sndctrlpipe(dev, 0),
|
||
FTDI_SIO_SET_FLOW_CTRL_REQUEST,
|
||
FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
|
||
urb_value , (FTDI_SIO_XON_XOFF_HS
|
||
| priv->interface),
|
||
buf, 0, WDR_TIMEOUT) < 0) {
|
||
err("urb failed to set to xon/xoff flow control");
|
||
}
|
||
} else {
|
||
/* else clause to only run if cfag ! CRTSCTS and iflag ! XOFF */
|
||
/* CHECKME Assuming XON/XOFF handled by tty stack - not by device */
|
||
dbg("%s Turning off hardware flow control", __FUNCTION__);
|
||
if (usb_control_msg(dev,
|
||
usb_sndctrlpipe(dev, 0),
|
||
FTDI_SIO_SET_FLOW_CTRL_REQUEST,
|
||
FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
|
||
0, priv->interface,
|
||
buf, 0, WDR_TIMEOUT) < 0) {
|
||
err("urb failed to clear flow control");
|
||
}
|
||
}
|
||
|
||
}
|
||
return;
|
||
} /* ftdi_termios */
|
||
|
||
|
||
static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file)
|
||
{
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
unsigned char buf[2];
|
||
int ret;
|
||
|
||
dbg("%s TIOCMGET", __FUNCTION__);
|
||
switch (priv->chip_type) {
|
||
case SIO:
|
||
/* Request the status from the device */
|
||
if ((ret = usb_control_msg(port->serial->dev,
|
||
usb_rcvctrlpipe(port->serial->dev, 0),
|
||
FTDI_SIO_GET_MODEM_STATUS_REQUEST,
|
||
FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
|
||
0, 0,
|
||
buf, 1, WDR_TIMEOUT)) < 0 ) {
|
||
err("%s Could not get modem status of device - err: %d", __FUNCTION__,
|
||
ret);
|
||
return(ret);
|
||
}
|
||
break;
|
||
case FT8U232AM:
|
||
case FT232BM:
|
||
case FT2232C:
|
||
/* the 8U232AM returns a two byte value (the sio is a 1 byte value) - in the same
|
||
format as the data returned from the in point */
|
||
if ((ret = usb_control_msg(port->serial->dev,
|
||
usb_rcvctrlpipe(port->serial->dev, 0),
|
||
FTDI_SIO_GET_MODEM_STATUS_REQUEST,
|
||
FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
|
||
0, priv->interface,
|
||
buf, 2, WDR_TIMEOUT)) < 0 ) {
|
||
err("%s Could not get modem status of device - err: %d", __FUNCTION__,
|
||
ret);
|
||
return(ret);
|
||
}
|
||
break;
|
||
default:
|
||
return -EFAULT;
|
||
break;
|
||
}
|
||
|
||
return (buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) |
|
||
(buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) |
|
||
(buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) |
|
||
(buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0) |
|
||
priv->last_dtr_rts;
|
||
}
|
||
|
||
static int ftdi_tiocmset(struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear)
|
||
{
|
||
dbg("%s TIOCMSET", __FUNCTION__);
|
||
return update_mctrl(port, set, clear);
|
||
}
|
||
|
||
|
||
static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
|
||
{
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
|
||
dbg("%s cmd 0x%04x", __FUNCTION__, cmd);
|
||
|
||
/* Based on code from acm.c and others */
|
||
switch (cmd) {
|
||
|
||
case TIOCGSERIAL: /* gets serial port data */
|
||
return get_serial_info(port, (struct serial_struct __user *) arg);
|
||
|
||
case TIOCSSERIAL: /* sets serial port data */
|
||
return set_serial_info(port, (struct serial_struct __user *) arg);
|
||
|
||
/*
|
||
* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
|
||
* - mask passed in arg for lines of interest
|
||
* (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
|
||
* Caller should use TIOCGICOUNT to see which one it was.
|
||
*
|
||
* This code is borrowed from linux/drivers/char/serial.c
|
||
*/
|
||
case TIOCMIWAIT:
|
||
while (priv != NULL) {
|
||
interruptible_sleep_on(&priv->delta_msr_wait);
|
||
/* see if a signal did it */
|
||
if (signal_pending(current))
|
||
return -ERESTARTSYS;
|
||
else {
|
||
char diff = priv->diff_status;
|
||
|
||
if (diff == 0) {
|
||
return -EIO; /* no change => error */
|
||
}
|
||
|
||
/* Consume all events */
|
||
priv->diff_status = 0;
|
||
|
||
/* Return 0 if caller wanted to know about these bits */
|
||
if ( ((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) ||
|
||
((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) ||
|
||
((arg & TIOCM_CD) && (diff & FTDI_RS0_RLSD)) ||
|
||
((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS)) ) {
|
||
return 0;
|
||
}
|
||
/*
|
||
* Otherwise caller can't care less about what happened,
|
||
* and so we continue to wait for more events.
|
||
*/
|
||
}
|
||
}
|
||
return(0);
|
||
break;
|
||
default:
|
||
break;
|
||
|
||
}
|
||
|
||
|
||
/* This is not necessarily an error - turns out the higher layers will do
|
||
* some ioctls itself (see comment above)
|
||
*/
|
||
dbg("%s arg not supported - it was 0x%04x - check /usr/include/asm/ioctls.h", __FUNCTION__, cmd);
|
||
|
||
return(-ENOIOCTLCMD);
|
||
} /* ftdi_ioctl */
|
||
|
||
|
||
static void ftdi_throttle (struct usb_serial_port *port)
|
||
{
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
unsigned long flags;
|
||
|
||
dbg("%s - port %d", __FUNCTION__, port->number);
|
||
|
||
spin_lock_irqsave(&priv->rx_lock, flags);
|
||
priv->rx_flags |= THROTTLED;
|
||
spin_unlock_irqrestore(&priv->rx_lock, flags);
|
||
}
|
||
|
||
|
||
static void ftdi_unthrottle (struct usb_serial_port *port)
|
||
{
|
||
struct ftdi_private *priv = usb_get_serial_port_data(port);
|
||
int actually_throttled;
|
||
unsigned long flags;
|
||
|
||
dbg("%s - port %d", __FUNCTION__, port->number);
|
||
|
||
spin_lock_irqsave(&priv->rx_lock, flags);
|
||
actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED;
|
||
priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
|
||
spin_unlock_irqrestore(&priv->rx_lock, flags);
|
||
|
||
if (actually_throttled)
|
||
schedule_work(&priv->rx_work);
|
||
}
|
||
|
||
static int __init ftdi_init (void)
|
||
{
|
||
int retval;
|
||
|
||
dbg("%s", __FUNCTION__);
|
||
if (vendor > 0 && product > 0) {
|
||
/* Add user specified VID/PID to reserved element of table. */
|
||
int i;
|
||
for (i = 0; id_table_combined[i].idVendor; i++)
|
||
;
|
||
id_table_combined[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
|
||
id_table_combined[i].idVendor = vendor;
|
||
id_table_combined[i].idProduct = product;
|
||
}
|
||
retval = usb_serial_register(&ftdi_sio_device);
|
||
if (retval)
|
||
goto failed_sio_register;
|
||
retval = usb_register(&ftdi_driver);
|
||
if (retval)
|
||
goto failed_usb_register;
|
||
|
||
info(DRIVER_VERSION ":" DRIVER_DESC);
|
||
return 0;
|
||
failed_usb_register:
|
||
usb_serial_deregister(&ftdi_sio_device);
|
||
failed_sio_register:
|
||
return retval;
|
||
}
|
||
|
||
|
||
static void __exit ftdi_exit (void)
|
||
{
|
||
|
||
dbg("%s", __FUNCTION__);
|
||
|
||
usb_deregister (&ftdi_driver);
|
||
usb_serial_deregister (&ftdi_sio_device);
|
||
|
||
}
|
||
|
||
|
||
module_init(ftdi_init);
|
||
module_exit(ftdi_exit);
|
||
|
||
MODULE_AUTHOR( DRIVER_AUTHOR );
|
||
MODULE_DESCRIPTION( DRIVER_DESC );
|
||
MODULE_LICENSE("GPL");
|
||
|
||
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
||
MODULE_PARM_DESC(debug, "Debug enabled or not");
|
||
module_param(vendor, ushort, 0);
|
||
MODULE_PARM_DESC(vendor, "User specified vendor ID (default="
|
||
__MODULE_STRING(FTDI_VID)")");
|
||
module_param(product, ushort, 0);
|
||
MODULE_PARM_DESC(vendor, "User specified product ID");
|
||
|