/* * USB FTDI SIO driver * * 	Copyright (C) 1999 - 2001 * 	    Greg Kroah-Hartman (greg@kroah.com) *          Bill Ryder (bryder@sgi.com) *	Copyright (C) 2002 *	    Kuba Ober (kuba@mareimbrium.org) * * 	This program is free software; you can redistribute it and/or modify * 	it under the terms of the GNU General Public License as published by * 	the Free Software Foundation; either version 2 of the License, or * 	(at your option) any later version. * * See Documentation/usb/usb-serial.txt for more information on using this driver * * See http://ftdi-usb-sio.sourceforge.net for upto date testing info *	and extra documentation * * (2/Feb/2006) ST *      Added support for the 232R chip. * * (10/Mar/2004) Jan Capek *      Added PID's for ICD-U20/ICD-U40 - incircuit PIC debuggers from CCS Inc. * * (09/Feb/2004) Ian Abbott *      Changed full name of USB-UIRT device to avoid "/" character. *      Added FTDI's alternate PID (0x6006) for FT232/245 devices. *      Added PID for "ELV USB Module UO100" from Stefan Frings. *  * (21/Oct/2003) Ian Abbott *      Renamed some VID/PID macros for Matrix Orbital and Perle Systems *      devices.  Removed Matrix Orbital and Perle Systems devices from the *      8U232AM device table, but left them in the FT232BM table, as they are *      known to use only FT232BM. * * (17/Oct/2003) Scott Allen *      Added vid/pid for Perle Systems UltraPort USB serial converters * * (21/Sep/2003) Ian Abbott *      Added VID/PID for Omnidirectional Control Technology US101 USB to *      RS-232 adapter (also rebadged as Dick Smith Electronics XH6381). *      VID/PID supplied by Donald Gordon. * * (19/Aug/2003) Ian Abbott *      Omitted some paranoid checks in write bulk callback that don't matter. * * (05/Aug/2003) Ian Abbott *      Added VID/PID for ID TECH IDT1221U USB to RS-232 adapter. *      VID/PID provided by Steve Briggs. * * (23/Jul/2003) Ian Abbott *      Added PIDs for CrystalFontz 547, 633, 631, 635, 640 and 640 from *      Wayne Wylupski. * * (10/Jul/2003) David Glance *      Added PID for DSS-20 SyncStation cradle for Sony-Ericsson P800. * * (23/Jun/2003) Ian Abbott *      Reduced flip buffer pushes and corrected a data length test in *      ftdi_read_bulk_callback. *      Defererence pointers after any paranoid checks, not before. * * (21/Jun/2003) Erik Nygren *      Added support for Home Electronics Tira-1 IR tranceiver using FT232BM chip. *      See <http://www.home-electro.com/tira1.htm>.  Only operates properly  *      at 100000 and RTS-CTS, so set custom divisor mode on startup. *      Also force the Tira-1 and USB-UIRT to only use their custom baud rates. * * (18/Jun/2003) Ian Abbott *      Added Device ID of the USB relais from Rudolf Gugler (backported from *      Philipp G黨ring's patch for 2.5.x kernel). *      Moved read transfer buffer reallocation into startup function. *      Free existing write urb and transfer buffer in startup function. *      Only use urbs in write urb pool that were successfully allocated. *      Moved some constant macros out of functions. *      Minor whitespace and comment changes. * * (12/Jun/2003) David Norwood *      Added support for USB-UIRT IR tranceiver using 8U232AM chip. *      See <http://home.earthlink.net/~jrhees/USBUIRT/index.htm>.  Only *      operates properly at 312500, so set custom divisor mode on startup. * * (12/Jun/2003) Ian Abbott *      Added Sealevel SeaLINK+ 210x, 220x, 240x, 280x vid/pids from Tuan Hoang *      - I've eliminated some that don't seem to exist! *      Added Home Electronics Tira-1 IR transceiver pid from Chris Horn *      Some whitespace/coding-style cleanups * * (11/Jun/2003) Ian Abbott *      Fixed unsafe spinlock usage in ftdi_write * * (24/Feb/2003) Richard Shooter *      Increase read buffer size to improve read speeds at higher baud rates *      (specifically tested with up to 1Mb/sec at 1.5M baud) * * (23/Feb/2003) John Wilkins *      Added Xon/xoff flow control (activating support in the ftdi device) *      Added vid/pid for Videonetworks/Homechoice (UK ISP) * * (23/Feb/2003) Bill Ryder *      Added matrix orb device vid/pids from Wayne Wylupski * * (19/Feb/2003) Ian Abbott *      For TIOCSSERIAL, set alt_speed to 0 when ASYNC_SPD_MASK value has *      changed to something other than ASYNC_SPD_HI, ASYNC_SPD_VHI, *      ASYNC_SPD_SHI or ASYNC_SPD_WARP.  Also, unless ASYNC_SPD_CUST is in *      force, don't bother changing baud rate when custom_divisor has changed. * * (18/Feb/2003) Ian Abbott *      Fixed TIOCMGET handling to include state of DTR and RTS, the state *      of which are now saved by set_dtr() and set_rts(). *      Fixed improper storage class for buf in set_dtr() and set_rts(). *      Added FT232BM chip type and support for its extra baud rates (compared *      to FT8U232AM). *      Took account of special case divisor values for highest baud rates of *      FT8U232AM and FT232BM. *      For TIOCSSERIAL, forced alt_speed to 0 when ASYNC_SPD_CUST kludge used, *      as previous alt_speed setting is now stale. *      Moved startup code common between the startup routines for the *      different chip types into a common subroutine. * * (17/Feb/2003) Bill Ryder *      Added write urb buffer pool on a per device basis *      Added more checking for open file on callbacks (fixed OOPS) *      Added CrystalFontz 632 and 634 PIDs  *         (thanx to CrystalFontz for the sample devices - they flushed out *           some driver bugs) *      Minor debugging message changes *      Added throttle, unthrottle and chars_in_buffer functions *      Fixed FTDI_SIO (the original device) bug *      Fixed some shutdown handling *       *  *  *  * (07/Jun/2002) Kuba Ober *	Changed FTDI_SIO_BASE_BAUD_TO_DIVISOR macro into ftdi_baud_to_divisor *	function. It was getting too complex. *	Fix the divisor calculation logic which was setting divisor of 0.125 *	instead of 0.5 for fractional parts of divisor equal to 5/8, 6/8, 7/8. *	Also make it bump up the divisor to next integer in case of 7/8 - it's *	a better approximation. * * (25/Jul/2002) Bill Ryder inserted Dmitri's TIOCMIWAIT patch *      Not tested by me but it doesn't break anything I use. *  * (04/Jan/2002) Kuba Ober *	Implemented 38400 baudrate kludge, where it can be substituted with other *	  values. That's the only way to set custom baudrates. *	Implemented TIOCSSERIAL, TIOCGSERIAL ioctl's so that setserial is happy. *	FIXME: both baudrate things should eventually go to usbserial.c as other *	  devices may need that functionality too. Actually, it can probably be *	  merged in serial.c somehow - too many drivers repeat this code over *	  and over. *	Fixed baudrate forgetfulness - open() used to reset baudrate to 9600 every time. *	Divisors for baudrates are calculated by a macro. *	Small code cleanups. Ugly whitespace changes for Plato's sake only ;-]. * * (04/Nov/2001) Bill Ryder *	Fixed bug in read_bulk_callback where incorrect urb buffer was used. *	Cleaned up write offset calculation *	Added write_room since default values can be incorrect for sio *	Changed write_bulk_callback to use same queue_task as other drivers *        (the previous version caused panics) *	Removed port iteration code since the device only has one I/O port and it *	  was wrong anyway. *  * (31/May/2001) gkh *	Switched from using spinlock to a semaphore, which fixes lots of problems. * * (23/May/2001)   Bill Ryder *	Added runtime debug patch (thanx Tyson D Sawyer). *	Cleaned up comments for 8U232 *	Added parity, framing and overrun error handling *	Added receive break handling. *  * (04/08/2001) gb *	Identify version on module load. *        * (18/March/2001) Bill Ryder *	(Not released) *	Added send break handling. (requires kernel patch too) *	Fixed 8U232AM hardware RTS/CTS etc status reporting. *	Added flipbuf fix copied from generic device *  * (12/3/2000) Bill Ryder *	Added support for 8U232AM device. *	Moved PID and VIDs into header file only. *	Turned on low-latency for the tty (device will do high baudrates) *	Added shutdown routine to close files when device removed. *	More debug and error message cleanups. * * (11/13/2000) Bill Ryder *	Added spinlock protected open code and close code. *	Multiple opens work (sort of - see webpage mentioned above). *	Cleaned up comments. Removed multiple PID/VID definitions. *	Factorised cts/dtr code *	Made use of __FUNCTION__ in dbg's *       * (11/01/2000) Adam J. Richter *	usb_device_id table support *  * (10/05/2000) gkh *	Fixed bug with urb->dev not being set properly, now that the usb *	core needs it. *  * (09/11/2000) gkh *	Removed DEBUG #ifdefs with call to usb_serial_debug_data * * (07/19/2000) gkh *	Added module_init and module_exit functions to handle the fact that this *	driver is a loadable module now. * * (04/04/2000) Bill Ryder  *	Fixed bugs in TCGET/TCSET ioctls (by removing them - they are *        handled elsewhere in the tty io driver chain). * * (03/30/2000) Bill Ryder  *	Implemented lots of ioctls *	Fixed a race condition in write *	Changed some dbg's to errs * * (03/26/2000) gkh *	Split driver up into device specific pieces. * *//* Bill Ryder - bryder@sgi.com - wrote the FTDI_SIO implementation *//* Thanx to FTDI for so kindly providing details of the protocol required *//*   to talk to the device *//* Thanx to gkh and the rest of the usb dev group for all code I have assimilated :-) */#include <linux/config.h>#include <linux/kernel.h>#include <linux/errno.h>#include <linux/init.h>#include <linux/slab.h>#include <linux/tty.h>#include <linux/tty_driver.h>#include <linux/tty_flip.h>#include <linux/module.h>#include <linux/spinlock.h>#include <asm/uaccess.h>#include <linux/usb.h>#include <linux/serial.h>#ifdef CONFIG_USB_SERIAL_DEBUG	static int debug = 1;#else	static int debug;#endif#include "usb-serial.h"#include "ftdi_sio.h"/* * Version Information */#define DRIVER_VERSION "v1.3.5r1"#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Bill Ryder <bryder@sgi.com>, Kuba Ober <kuba@mareimbrium.org>"#define DRIVER_DESC "USB FTDI Serial Converters Driver"static struct usb_device_id id_table_sio [] = {	{ USB_DEVICE(FTDI_VID, FTDI_SIO_PID) },	{ }						/* Terminating entry */};/* * The 8U232AM has the same API as the sio except for: * - it can support MUCH higher baudrates; up to: *   o 921600 for RS232 and 2000000 for RS422/485 at 48MHz *   o 230400 at 12MHz *   so .. 8U232AM's baudrate setting codes are different * - it has a two byte status code. * - it returns characters every 16ms (the FTDI does it every 40ms) * * the bcdDevice value is used to differentiate FT232BM and FT245BM from * the earlier FT8U232AM and FT8U232BM.  For now, include all known VID/PID * combinations in both tables. * FIXME: perhaps bcdDevice can also identify 12MHz devices, but I don't know * if those ever went into mass production. [Ian Abbott] */static struct usb_device_id id_table_8U232AM [] = {	{ USB_DEVICE_VER(FTDI_VID, FTDI_IRTRANS_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, FTDI_8U232AM_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, FTDI_8U232AM_ALT_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, FTDI_RELAIS_PID, 0, 0x3ff) },	{ USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_IOBOARD_PID) },	{ USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_MINI_IOBOARD_PID) },	{ USB_DEVICE_VER(FTDI_NF_RIC_VID, FTDI_NF_RIC_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, FTDI_XF_632_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, FTDI_XF_634_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, FTDI_XF_547_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, FTDI_XF_633_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, FTDI_XF_631_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, FTDI_XF_635_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, FTDI_XF_640_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, FTDI_XF_642_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, FTDI_VNHCPCUSB_D_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, FTDI_DSS20_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2101_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2102_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2103_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2104_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2201_1_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2201_2_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2202_1_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2202_2_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2203_1_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2203_2_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2401_1_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2401_2_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2401_3_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2401_4_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2402_1_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2402_2_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2402_3_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2402_4_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2403_1_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2403_2_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2403_3_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2403_4_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2801_1_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2801_2_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2801_3_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2801_4_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2801_5_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2801_6_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2801_7_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2801_8_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2802_1_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2802_2_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2802_3_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2802_4_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2802_5_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2802_6_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2802_7_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2802_8_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2803_1_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2803_2_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2803_3_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2803_4_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2803_5_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2803_6_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2803_7_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2803_8_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(IDTECH_VID, IDTECH_IDT1221U_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(OCT_VID, OCT_US101_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, PROTEGO_SPECIAL_1, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, PROTEGO_R2X0, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, PROTEGO_SPECIAL_3, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, PROTEGO_SPECIAL_4, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, FTDI_ELV_UO100_PID, 0, 0x3ff) },	{ USB_DEVICE_VER(FTDI_VID, FTDI_ELV_UM100_PID, 0, 0x3ff) },