[people/arne_f/kernel.git] / drivers / usb / serial / ftdi_sio.c

/*
 * 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
 *
 * (21/Jul/2004) Ian Abbott
 *      Incorporated Steven Turner's code to add support for the FT2232C chip.
 *      The prelimilary port to the 2.6 kernel was by Rus V. Brushkoff.  I have
 *      fixed a couple of things.
 *
 * (27/May/2004) Ian Abbott
 *      Improved throttling code, mostly stolen from the WhiteHEAT driver.
 *
 * (26/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
 *      Freed urb's transfer buffer in write bulk callback.
 *      Omitted some paranoid checks in write bulk callback that don't matter.
 *      Scheduled work in write bulk callback regardless of port's open count.
 *
 * (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.
 *
 * (27/Jun/2003) Ian Abbott
 *	Reworked the urb handling logic.  We have no more pool, but dynamically
 *	allocate the urb and the transfer buffer on the fly.  In testing this
 *	does not incure any measurable overhead.  This also relies on the fact
 *	that we have proper reference counting logic for urbs.  I nicked this
 *	from Greg KH's Visor driver.
 *      
 * (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 transceiver 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
Commit	Line	Data
1da177e4 LT	1	/*
	2	* USB FTDI SIO driver
	3	*
	4	* Copyright (C) 1999 - 2001
	5	* Greg Kroah-Hartman (greg@kroah.com)
	6	* Bill Ryder (bryder@sgi.com)
	7	* Copyright (C) 2002
	8	* Kuba Ober (kuba@mareimbrium.org)
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*
	15	* See Documentation/usb/usb-serial.txt for more information on using this driver
	16	*
	17	* See http://ftdi-usb-sio.sourceforge.net for upto date testing info
	18	* and extra documentation
	19	*
	20	* (21/Jul/2004) Ian Abbott
	21	* Incorporated Steven Turner's code to add support for the FT2232C chip.
	22	* The prelimilary port to the 2.6 kernel was by Rus V. Brushkoff. I have
	23	* fixed a couple of things.
	24	*
	25	* (27/May/2004) Ian Abbott
	26	* Improved throttling code, mostly stolen from the WhiteHEAT driver.
	27	*
	28	* (26/Mar/2004) Jan Capek
	29	* Added PID's for ICD-U20/ICD-U40 - incircuit PIC debuggers from CCS Inc.
	30	*
	31	* (09/Feb/2004) Ian Abbott
	32	* Changed full name of USB-UIRT device to avoid "/" character.
	33	* Added FTDI's alternate PID (0x6006) for FT232/245 devices.
	34	* Added PID for "ELV USB Module UO100" from Stefan Frings.
	35	*
	36	* (21/Oct/2003) Ian Abbott
	37	* Renamed some VID/PID macros for Matrix Orbital and Perle Systems
	38	* devices. Removed Matrix Orbital and Perle Systems devices from the
	39	* 8U232AM device table, but left them in the FT232BM table, as they are
	40	* known to use only FT232BM.
	41	*
	42	* (17/Oct/2003) Scott Allen
	43	* Added vid/pid for Perle Systems UltraPort USB serial converters
	44	*
	45	* (21/Sep/2003) Ian Abbott
	46	* Added VID/PID for Omnidirectional Control Technology US101 USB to
	47	* RS-232 adapter (also rebadged as Dick Smith Electronics XH6381).
	48	* VID/PID supplied by Donald Gordon.
	49	*
	50	* (19/Aug/2003) Ian Abbott
	51	* Freed urb's transfer buffer in write bulk callback.
	52	* Omitted some paranoid checks in write bulk callback that don't matter.
	53	* Scheduled work in write bulk callback regardless of port's open count.
	54	*
	55	* (05/Aug/2003) Ian Abbott
	56	* Added VID/PID for ID TECH IDT1221U USB to RS-232 adapter.
	57	* VID/PID provided by Steve Briggs.
	58	*
	59	* (23/Jul/2003) Ian Abbott
	60	* Added PIDs for CrystalFontz 547, 633, 631, 635, 640 and 640 from
	61	* Wayne Wylupski.
	62	*
	63	* (10/Jul/2003) David Glance
	64	* Added PID for DSS-20 SyncStation cradle for Sony-Ericsson P800.
65	*
66	* (27/Jun/2003) Ian Abbott
67	* Reworked the urb handling logic. We have no more pool, but dynamically
68	* allocate the urb and the transfer buffer on the fly. In testing this
69	* does not incure any measurable overhead. This also relies on the fact
70	* that we have proper reference counting logic for urbs. I nicked this
71	* from Greg KH's Visor driver.
72	*
73	* (23/Jun/2003) Ian Abbott
74	* Reduced flip buffer pushes and corrected a data length test in
75	* ftdi_read_bulk_callback.
76	* Defererence pointers after any paranoid checks, not before.
77	*
78	* (21/Jun/2003) Erik Nygren
093cf723	79	* Added support for Home Electronics Tira-1 IR transceiver using FT232BM chip.
1da177e4 LT	80	* See <http://www.home-electro.com/tira1.htm>. Only operates properly
	81	* at 100000 and RTS-CTS, so set custom divisor mode on startup.
	82	* Also force the Tira-1 and USB-UIRT to only use their custom baud rates.
	83	*
	84	* (18/Jun/2003) Ian Abbott
	85	* Added Device ID of the USB relais from Rudolf Gugler (backported from
	86