4 * Copyright (C) 1999 - 2001
5 * Greg Kroah-Hartman (greg@kroah.com)
6 * Bill Ryder (bryder@sgi.com)
8 * Kuba Ober (kuba@mareimbrium.org)
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.
15 * See Documentation/usb/usb-serial.txt for more information on using this driver
17 * See http://ftdi-usb-sio.sourceforge.net for upto date testing info
18 * and extra documentation
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.
25 * (27/May/2004) Ian Abbott
26 * Improved throttling code, mostly stolen from the WhiteHEAT driver.
28 * (26/Mar/2004) Jan Capek
29 * Added PID's for ICD-U20/ICD-U40 - incircuit PIC debuggers from CCS Inc.
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.
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.
42 * (17/Oct/2003) Scott Allen
43 * Added vid/pid for Perle Systems UltraPort USB serial converters
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.
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.
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.
59 * (23/Jul/2003) Ian Abbott
60 * Added PIDs for CrystalFontz 547, 633, 631, 635, 640 and 640 from
63 * (10/Jul/2003) David Glance
64 * Added PID for DSS-20 SyncStation cradle for Sony-Ericsson P800.
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.
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.
78 * (21/Jun/2003) Erik Nygren
79 * Added support for Home Electronics Tira-1 IR transceiver using FT232BM chip.
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.
84 * (18/Jun/2003) Ian Abbott
85 * Added Device ID of the USB relais from Rudolf Gugler (backported from
86 * Philipp Gühring's patch for 2.5.x kernel).
87 * Moved read transfer buffer reallocation into startup function.
88 * Free existing write urb and transfer buffer in startup function.
89 * Only use urbs in write urb pool that were successfully allocated.
90 * Moved some constant macros out of functions.
91 * Minor whitespace and comment changes.
93 * (12/Jun/2003) David Norwood
94 * Added support for USB-UIRT IR transceiver using 8U232AM chip.
95 * See <http://home.earthlink.net/~jrhees/USBUIRT/index.htm>. Only
96 * operates properly at 312500, so set custom divisor mode on startup.
98 * (12/Jun/2003) Ian Abbott
99 * Added Sealevel SeaLINK+ 210x, 220x, 240x, 280x vid/pids from Tuan Hoang
100 * - I've eliminated some that don't seem to exist!
101 * Added Home Electronics Tira-1 IR transceiver pid from Chris Horn
102 * Some whitespace/coding-style cleanups
104 * (11/Jun/2003) Ian Abbott
105 * Fixed unsafe spinlock usage in ftdi_write
107 * (24/Feb/2003) Richard Shooter
108 * Increase read buffer size to improve read speeds at higher baud rates
109 * (specifically tested with up to 1Mb/sec at 1.5M baud)
111 * (23/Feb/2003) John Wilkins
112 * Added Xon/xoff flow control (activating support in the ftdi device)
113 * Added vid/pid for Videonetworks/Homechoice (UK ISP)
115 * (23/Feb/2003) Bill Ryder
116 * Added matrix orb device vid/pids from Wayne Wylupski
118 * (19/Feb/2003) Ian Abbott
119 * For TIOCSSERIAL, set alt_speed to 0 when ASYNC_SPD_MASK value has
120 * changed to something other than ASYNC_SPD_HI, ASYNC_SPD_VHI,
121 * ASYNC_SPD_SHI or ASYNC_SPD_WARP. Also, unless ASYNC_SPD_CUST is in
122 * force, don't bother changing baud rate when custom_divisor has changed.
124 * (18/Feb/2003) Ian Abbott
125 * Fixed TIOCMGET handling to include state of DTR and RTS, the state
126 * of which are now saved by set_dtr() and set_rts().
127 * Fixed improper storage class for buf in set_dtr() and set_rts().
128 * Added FT232BM chip type and support for its extra baud rates (compared
130 * Took account of special case divisor values for highest baud rates of
131 * FT8U232AM and FT232BM.
132 * For TIOCSSERIAL, forced alt_speed to 0 when ASYNC_SPD_CUST kludge used,
133 * as previous alt_speed setting is now stale.
134 * Moved startup code common between the startup routines for the
135 * different chip types into a common subroutine.
137 * (17/Feb/2003) Bill Ryder
138 * Added write urb buffer pool on a per device basis
139 * Added more checking for open file on callbacks (fixed OOPS)
140 * Added CrystalFontz 632 and 634 PIDs
141 * (thanx to CrystalFontz for the sample devices - they flushed out
143 * Minor debugging message changes
144 * Added throttle, unthrottle and chars_in_buffer functions
145 * Fixed FTDI_SIO (the original device) bug
146 * Fixed some shutdown handling
151 * (07/Jun/2002) Kuba Ober
152 * Changed FTDI_SIO_BASE_BAUD_TO_DIVISOR macro into ftdi_baud_to_divisor
153 * function. It was getting too complex.
154 * Fix the divisor calculation logic which was setting divisor of 0.125
155 * instead of 0.5 for fractional parts of divisor equal to 5/8, 6/8, 7/8.
156 * Also make it bump up the divisor to next integer in case of 7/8 - it's
157 * a better approximation.
159 * (25/Jul/2002) Bill Ryder inserted Dmitri's TIOCMIWAIT patch
160 * Not tested by me but it doesn't break anything I use.
162 * (04/Jan/2002) Kuba Ober
163 * Implemented 38400 baudrate kludge, where it can be substituted with other
164 * values. That's the only way to set custom baudrates.
165 * Implemented TIOCSSERIAL, TIOCGSERIAL ioctl's so that setserial is happy.
166 * FIXME: both baudrate things should eventually go to usbserial.c as other
167 * devices may need that functionality too. Actually, it can probably be
168 * merged in serial.c somehow - too many drivers repeat this code over
170 * Fixed baudrate forgetfulness - open() used to reset baudrate to 9600 every time.
171 * Divisors for baudrates are calculated by a macro.
172 * Small code cleanups. Ugly whitespace changes for Plato's sake only ;-].
174 * (04/Nov/2001) Bill Ryder
175 * Fixed bug in read_bulk_callback where incorrect urb buffer was used.
176 * Cleaned up write offset calculation
177 * Added write_room since default values can be incorrect for sio
178 * Changed write_bulk_callback to use same queue_task as other drivers
179 * (the previous version caused panics)
180 * Removed port iteration code since the device only has one I/O port and it
184 * Switched from using spinlock to a semaphore, which fixes lots of problems.
186 * (23/May/2001) Bill Ryder
187 * Added runtime debug patch (thanx Tyson D Sawyer).
188 * Cleaned up comments for 8U232
189 * Added parity, framing and overrun error handling
190 * Added receive break handling.
193 * Identify version on module load.
195 * (18/March/2001) Bill Ryder
197 * Added send break handling. (requires kernel patch too)
198 * Fixed 8U232AM hardware RTS/CTS etc status reporting.
199 * Added flipbuf fix copied from generic device
201 * (12/3/2000) Bill Ryder
202 * Added support for 8U232AM device.
203 * Moved PID and VIDs into header file only.
204 * Turned on low-latency for the tty (device will do high baudrates)
205 * Added shutdown routine to close files when device removed.
206 * More debug and error message cleanups.
208 * (11/13/2000) Bill Ryder
209 * Added spinlock protected open code and close code.
210 * Multiple opens work (sort of - see webpage mentioned above).
211 * Cleaned up comments. Removed multiple PID/VID definitions.
212 * Factorised cts/dtr code
213 * Made use of __FUNCTION__ in dbg's
215 * (11/01/2000) Adam J. Richter
216 * usb_device_id table support
219 * Fixed bug with urb->dev not being set properly, now that the usb
223 * Removed DEBUG #ifdefs with call to usb_serial_debug_data
226 * Added module_init and module_exit functions to handle the fact that this
227 * driver is a loadable module now.
229 * (04/04/2000) Bill Ryder
230 * Fixed bugs in TCGET/TCSET ioctls (by removing them - they are
231 * handled elsewhere in the tty io driver chain).
233 * (03/30/2000) Bill Ryder
234 * Implemented lots of ioctls
235 * Fixed a race condition in write
236 * Changed some dbg's to errs
239 * Split driver up into device specific pieces.
243 /* Bill Ryder - bryder@sgi.com - wrote the FTDI_SIO implementation */
244 /* Thanx to FTDI for so kindly providing details of the protocol required */
245 /* to talk to the device */
246 /* Thanx to gkh and the rest of the usb dev group for all code I have assimilated :-) */
248 #include <linux/kernel.h>
249 #include <linux/errno.h>
250 #include <linux/init.h>
251 #include <linux/slab.h>
252 #include <linux/tty.h>
253 #include <linux/tty_driver.h>
254 #include <linux/tty_flip.h>
255 #include <linux/module.h>
256 #include <linux/spinlock.h>
257 #include <asm/uaccess.h>
258 #include <linux/usb.h>
259 #include <linux/serial.h>
260 #include <linux/usb/serial.h>
261 #include "ftdi_sio.h"
264 * Version Information
266 #define DRIVER_VERSION "v1.4.3"
267 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Bill Ryder <bryder@sgi.com>, Kuba Ober <kuba@mareimbrium.org>"
268 #define DRIVER_DESC "USB FTDI Serial Converters Driver"
271 static __u16 vendor = FTDI_VID;
272 static __u16 product;
274 struct ftdi_private {
275 ftdi_chip_type_t chip_type;
276 /* type of the device, either SIO or FT8U232AM */
277 int baud_base; /* baud base clock for divisor setting */
278 int custom_divisor; /* custom_divisor kludge, this is for baud_base (different from what goes to the chip!) */
279 __u16 last_set_data_urb_value ;
280 /* the last data state set - needed for doing a break */
281 int write_offset; /* This is the offset in the usb data block to write the serial data -
282 * it is different between devices
284 int flags; /* some ASYNC_xxxx flags are supported */
285 unsigned long last_dtr_rts; /* saved modem control outputs */
286 wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
287 char prev_status, diff_status; /* Used for TIOCMIWAIT */
288 __u8 rx_flags; /* receive state flags (throttling) */
289 spinlock_t rx_lock; /* spinlock for receive state */
290 struct delayed_work rx_work;
291 struct usb_serial_port *port;
293 unsigned long rx_bytes;
295 __u16 interface; /* FT2232C port interface (0 for FT232/245) */
297 speed_t force_baud; /* if non-zero, force the baud rate to this value */
298 int force_rtscts; /* if non-zero, force RTS-CTS to always be enabled */
300 spinlock_t tx_lock; /* spinlock for transmit state */
301 unsigned long tx_bytes;
302 unsigned long tx_outstanding_bytes;
303 unsigned long tx_outstanding_urbs;
306 /* struct ftdi_sio_quirk is used by devices requiring special attention. */
307 struct ftdi_sio_quirk {
308 int (*probe)(struct usb_serial *);
309 void (*port_probe)(struct ftdi_private *); /* Special settings for probed ports. */
312 static int ftdi_jtag_probe (struct usb_serial *serial);
313 static void ftdi_USB_UIRT_setup (struct ftdi_private *priv);
314 static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv);
316 static struct ftdi_sio_quirk ftdi_jtag_quirk = {
317 .probe = ftdi_jtag_probe,
320 static struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = {
321 .port_probe = ftdi_USB_UIRT_setup,
324 static struct ftdi_sio_quirk ftdi_HE_TIRA1_quirk = {
325 .port_probe = ftdi_HE_TIRA1_setup,
329 * The 8U232AM has the same API as the sio except for:
330 * - it can support MUCH higher baudrates; up to:
331 * o 921600 for RS232 and 2000000 for RS422/485 at 48MHz
333 * so .. 8U232AM's baudrate setting codes are different
334 * - it has a two byte status code.
335 * - it returns characters every 16ms (the FTDI does it every 40ms)
337 * the bcdDevice value is used to differentiate FT232BM and FT245BM from
338 * the earlier FT8U232AM and FT8U232BM. For now, include all known VID/PID
339 * combinations in both tables.
340 * FIXME: perhaps bcdDevice can also identify 12MHz FT8U232AM devices,
341 * but I don't know if those ever went into mass production. [Ian Abbott]
346 static struct usb_device_id id_table_combined [] = {
347 { USB_DEVICE(FTDI_VID, FTDI_AMC232_PID) },
348 { USB_DEVICE(FTDI_VID, FTDI_CANUSB_PID) },
349 { USB_DEVICE(FTDI_VID, FTDI_ACTZWAVE_PID) },
350 { USB_DEVICE(FTDI_VID, FTDI_IRTRANS_PID) },
351 { USB_DEVICE(FTDI_VID, FTDI_IPLUS_PID) },
352 { USB_DEVICE(FTDI_VID, FTDI_IPLUS2_PID) },
353 { USB_DEVICE(FTDI_VID, FTDI_DMX4ALL) },
354 { USB_DEVICE(FTDI_VID, FTDI_SIO_PID) },
355 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID) },
356 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_ALT_PID) },
357 { USB_DEVICE(FTDI_VID, FTDI_232RL_PID) },
358 { USB_DEVICE(FTDI_VID, FTDI_8U2232C_PID) },
359 { USB_DEVICE(FTDI_VID, FTDI_MICRO_CHAMELEON_PID) },
360 { USB_DEVICE(FTDI_VID, FTDI_RELAIS_PID) },
361 { USB_DEVICE(FTDI_VID, FTDI_OPENDCC_PID) },
362 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_IOBOARD_PID) },
363 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_MINI_IOBOARD_PID) },
364 { USB_DEVICE(FTDI_VID, FTDI_XF_632_PID) },
365 { USB_DEVICE(FTDI_VID, FTDI_XF_634_PID) },
366 { USB_DEVICE(FTDI_VID, FTDI_XF_547_PID) },
367 { USB_DEVICE(FTDI_VID, FTDI_XF_633_PID) },
368 { USB_DEVICE(FTDI_VID, FTDI_XF_631_PID) },
369 { USB_DEVICE(FTDI_VID, FTDI_XF_635_PID) },
370 { USB_DEVICE(FTDI_VID, FTDI_XF_640_PID) },
371 { USB_DEVICE(FTDI_VID, FTDI_XF_642_PID) },
372 { USB_DEVICE(FTDI_VID, FTDI_DSS20_PID) },
373 { USB_DEVICE(FTDI_NF_RIC_VID, FTDI_NF_RIC_PID) },
374 { USB_DEVICE(FTDI_VID, FTDI_VNHCPCUSB_D_PID) },
375 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_0_PID) },
376 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_1_PID) },
377 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_2_PID) },
378 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_3_PID) },
379 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_4_PID) },
380 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_5_PID) },
381 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) },
382 { USB_DEVICE(FTDI_VID, FTDI_PERLE_ULTRAPORT_PID) },
383 { USB_DEVICE(FTDI_VID, FTDI_PIEGROUP_PID) },
384 { USB_DEVICE(FTDI_VID, FTDI_TNC_X_PID) },
385 { USB_DEVICE(FTDI_VID, FTDI_USBX_707_PID) },
386 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2101_PID) },
387 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2102_PID) },
388 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2103_PID) },
389 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2104_PID) },
390 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2106_PID) },
391 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_1_PID) },
392 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_2_PID) },
393 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_1_PID) },
394 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_2_PID) },
395 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_1_PID) },
396 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_2_PID) },
397 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_1_PID) },
398 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_2_PID) },
399 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_3_PID) },
400 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_4_PID) },
401 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_1_PID) },
402 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_2_PID) },
403 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_3_PID) },
404 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_4_PID) },
405 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_1_PID) },
406 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_2_PID) },
407 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_3_PID) },
408 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_4_PID) },
409 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_1_PID) },
410 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_2_PID) },
411 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_3_PID) },
412 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_4_PID) },
413 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_5_PID) },
414 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_6_PID) },
415 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_7_PID) },
416 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_8_PID) },
417 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_1_PID) },
418 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_2_PID) },
419 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_3_PID) },
420 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_4_PID) },
421 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_5_PID) },
422 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_6_PID) },
423 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_7_PID) },
424 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_8_PID) },
425 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_1_PID) },
426 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_2_PID) },
427 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_3_PID) },
428 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_4_PID) },
429 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_5_PID) },
430 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_6_PID) },
431 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_7_PID) },
432 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_8_PID) },
433 { USB_DEVICE(IDTECH_VID, IDTECH_IDT1221U_PID) },
434 { USB_DEVICE(OCT_VID, OCT_US101_PID) },
435 { USB_DEVICE(FTDI_VID, FTDI_HE_TIRA1_PID),
436 .driver_info = (kernel_ulong_t)&ftdi_HE_TIRA1_quirk },
437 { USB_DEVICE(FTDI_VID, FTDI_USB_UIRT_PID),
438 .driver_info = (kernel_ulong_t)&ftdi_USB_UIRT_quirk },
439 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_1) },
440 { USB_DEVICE(FTDI_VID, PROTEGO_R2X0) },
441 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_3) },
442 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_4) },
443 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E808_PID) },
444 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E809_PID) },
445 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80A_PID) },
446 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80B_PID) },
447 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80C_PID) },
448 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80D_PID) },
449 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80E_PID) },
450 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80F_PID) },
451 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E888_PID) },
452 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E889_PID) },
453 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88A_PID) },
454 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88B_PID) },
455 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88C_PID) },
456 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88D_PID) },
457 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88E_PID) },
458 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88F_PID) },
459 { USB_DEVICE(FTDI_VID, FTDI_ELV_UO100_PID) },
460 { USB_DEVICE(FTDI_VID, FTDI_ELV_UM100_PID) },
461 { USB_DEVICE(FTDI_VID, FTDI_ELV_UR100_PID) },
462 { USB_DEVICE(FTDI_VID, FTDI_ELV_ALC8500_PID) },
463 { USB_DEVICE(FTDI_VID, FTDI_PYRAMID_PID) },
464 { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1000PC_PID) },
465 { USB_DEVICE(FTDI_VID, FTDI_IBS_US485_PID) },
466 { USB_DEVICE(FTDI_VID, FTDI_IBS_PICPRO_PID) },
467 { USB_DEVICE(FTDI_VID, FTDI_IBS_PCMCIA_PID) },
468 { USB_DEVICE(FTDI_VID, FTDI_IBS_PK1_PID) },
469 { USB_DEVICE(FTDI_VID, FTDI_IBS_RS232MON_PID) },
470 { USB_DEVICE(FTDI_VID, FTDI_IBS_APP70_PID) },
471 { USB_DEVICE(FTDI_VID, FTDI_IBS_PEDO_PID) },
472 { USB_DEVICE(FTDI_VID, FTDI_IBS_PROD_PID) },
474 * Due to many user requests for multiple ELV devices we enable
477 { USB_DEVICE(FTDI_VID, FTDI_ELV_CLI7000_PID) },
478 { USB_DEVICE(FTDI_VID, FTDI_ELV_PPS7330_PID) },
479 { USB_DEVICE(FTDI_VID, FTDI_ELV_TFM100_PID) },
480 { USB_DEVICE(FTDI_VID, FTDI_ELV_UDF77_PID) },
481 { USB_DEVICE(FTDI_VID, FTDI_ELV_UIO88_PID) },
482 { USB_DEVICE(FTDI_VID, FTDI_ELV_UAD8_PID) },
483 { USB_DEVICE(FTDI_VID, FTDI_ELV_UDA7_PID) },
484 { USB_DEVICE(FTDI_VID, FTDI_ELV_USI2_PID) },
485 { USB_DEVICE(FTDI_VID, FTDI_ELV_T1100_PID) },
486 { USB_DEVICE(FTDI_VID, FTDI_ELV_PCD200_PID) },
487 { USB_DEVICE(FTDI_VID, FTDI_ELV_ULA200_PID) },
488 { USB_DEVICE(FTDI_VID, FTDI_ELV_CSI8_PID) },
489 { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1000DL_PID) },
490 { USB_DEVICE(FTDI_VID, FTDI_ELV_PCK100_PID) },
491 { USB_DEVICE(FTDI_VID, FTDI_ELV_RFP500_PID) },
492 { USB_DEVICE(FTDI_VID, FTDI_ELV_FS20SIG_PID) },
493 { USB_DEVICE(FTDI_VID, FTDI_ELV_WS300PC_PID) },
494 { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1300PC_PID) },
495 { USB_DEVICE(FTDI_VID, FTDI_ELV_WS500_PID) },
496 { USB_DEVICE(FTDI_VID, LINX_SDMUSBQSS_PID) },
497 { USB_DEVICE(FTDI_VID, LINX_MASTERDEVEL2_PID) },
498 { USB_DEVICE(FTDI_VID, LINX_FUTURE_0_PID) },
499 { USB_DEVICE(FTDI_VID, LINX_FUTURE_1_PID) },
500 { USB_DEVICE(FTDI_VID, LINX_FUTURE_2_PID) },
501 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU20_0_PID) },
502 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU40_1_PID) },
503 { USB_DEVICE(FTDI_VID, FTDI_CCSMACHX_2_PID) },
504 { USB_DEVICE(FTDI_VID, INSIDE_ACCESSO) },
505 { USB_DEVICE(INTREPID_VID, INTREPID_VALUECAN_PID) },
506 { USB_DEVICE(INTREPID_VID, INTREPID_NEOVI_PID) },
507 { USB_DEVICE(FALCOM_VID, FALCOM_TWIST_PID) },
508 { USB_DEVICE(FALCOM_VID, FALCOM_SAMBA_PID) },
509 { USB_DEVICE(FTDI_VID, FTDI_SUUNTO_SPORTS_PID) },
510 { USB_DEVICE(TTI_VID, TTI_QL355P_PID) },
511 { USB_DEVICE(FTDI_VID, FTDI_RM_CANVIEW_PID) },
512 { USB_DEVICE(BANDB_VID, BANDB_USOTL4_PID) },
513 { USB_DEVICE(BANDB_VID, BANDB_USTL4_PID) },
514 { USB_DEVICE(BANDB_VID, BANDB_USO9ML2_PID) },
515 { USB_DEVICE(FTDI_VID, EVER_ECO_PRO_CDS) },
516 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_1_PID) },
517 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_2_PID) },
518 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_0_PID) },
519 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_1_PID) },
520 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_2_PID) },
521 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_3_PID) },
522 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_4_PID) },
523 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_5_PID) },
524 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_6_PID) },
525 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_7_PID) },
526 { USB_DEVICE(MOBILITY_VID, MOBILITY_USB_SERIAL_PID) },
527 { USB_DEVICE(FTDI_VID, FTDI_ACTIVE_ROBOTS_PID) },
528 { USB_DEVICE(FTDI_VID, FTDI_MHAM_KW_PID) },
529 { USB_DEVICE(FTDI_VID, FTDI_MHAM_YS_PID) },
530 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y6_PID) },
531 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y8_PID) },
532 { USB_DEVICE(FTDI_VID, FTDI_MHAM_IC_PID) },
533 { USB_DEVICE(FTDI_VID, FTDI_MHAM_DB9_PID) },
534 { USB_DEVICE(FTDI_VID, FTDI_MHAM_RS232_PID) },
535 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y9_PID) },
536 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_VCP_PID) },
537 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_D2XX_PID) },
538 { USB_DEVICE(EVOLUTION_VID, EVOLUTION_ER1_PID) },
539 { USB_DEVICE(EVOLUTION_VID, EVO_HYBRID_PID) },
540 { USB_DEVICE(EVOLUTION_VID, EVO_RCM4_PID) },
541 { USB_DEVICE(FTDI_VID, FTDI_ARTEMIS_PID) },
542 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16_PID) },
543 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16C_PID) },
544 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HR_PID) },
545 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HRC_PID) },
546 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16IC_PID) },
547 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_B1_PID) },
548 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_KAAN_PID) },
549 { USB_DEVICE(POSIFLEX_VID, POSIFLEX_PP7000_PID) },
550 { USB_DEVICE(FTDI_VID, FTDI_TTUSB_PID) },
551 { USB_DEVICE(FTDI_VID, FTDI_ECLO_COM_1WIRE_PID) },
552 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_777_PID) },
553 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_8900F_PID) },
554 { USB_DEVICE(FTDI_VID, FTDI_PCDJ_DAC2_PID) },
555 { USB_DEVICE(FTDI_VID, FTDI_RRCIRKITS_LOCOBUFFER_PID) },
556 { USB_DEVICE(FTDI_VID, FTDI_ASK_RDR400_PID) },
557 { USB_DEVICE(ICOM_ID1_VID, ICOM_ID1_PID) },
558 { USB_DEVICE(PAPOUCH_VID, PAPOUCH_TMU_PID) },
559 { USB_DEVICE(FTDI_VID, FTDI_ACG_HFDUAL_PID) },
560 { USB_DEVICE(FTDI_VID, FTDI_YEI_SERVOCENTER31_PID) },
561 { USB_DEVICE(FTDI_VID, FTDI_THORLABS_PID) },
562 { USB_DEVICE(TESTO_VID, TESTO_USB_INTERFACE_PID) },
563 { USB_DEVICE(FTDI_VID, FTDI_GAMMA_SCOUT_PID) },
564 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13M_PID) },
565 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13S_PID) },
566 { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13U_PID) },
567 { USB_DEVICE(ELEKTOR_VID, ELEKTOR_FT323R_PID) },
568 { USB_DEVICE(TELLDUS_VID, TELLDUS_TELLSTICK_PID) },
569 { USB_DEVICE(FTDI_VID, FTDI_MAXSTREAM_PID) },
570 { USB_DEVICE(TML_VID, TML_USB_SERIAL_PID) },
571 { USB_DEVICE(FTDI_VID, FTDI_ELSTER_UNICOM_PID) },
572 { USB_DEVICE(OLIMEX_VID, OLIMEX_ARM_USB_OCD_PID),
573 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
574 { USB_DEVICE(FIC_VID, FIC_NEO1973_DEBUG_PID),
575 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
576 { USB_DEVICE(FTDI_VID, FTDI_OOCDLINK_PID),
577 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
578 { }, /* Optional parameter entry */
579 { } /* Terminating entry */
582 MODULE_DEVICE_TABLE (usb, id_table_combined);
584 static struct usb_driver ftdi_driver = {
586 .probe = usb_serial_probe,
587 .disconnect = usb_serial_disconnect,
588 .id_table = id_table_combined,
592 static const char *ftdi_chip_name[] = {
593 [SIO] = "SIO", /* the serial part of FT8U100AX */
594 [FT8U232AM] = "FT8U232AM",
595 [FT232BM] = "FT232BM",
596 [FT2232C] = "FT2232C",
597 [FT232RL] = "FT232RL",
601 /* Constants for read urb and write urb */
606 #define THROTTLED 0x01
607 #define ACTUALLY_THROTTLED 0x02
609 /* Used for TIOCMIWAIT */
610 #define FTDI_STATUS_B0_MASK (FTDI_RS0_CTS | FTDI_RS0_DSR | FTDI_RS0_RI | FTDI_RS0_RLSD)
611 #define FTDI_STATUS_B1_MASK (FTDI_RS_BI)
614 #define FTDI_IMPL_ASYNC_FLAGS = ( ASYNC_SPD_HI | ASYNC_SPD_VHI \
615 ASYNC_SPD_CUST | ASYNC_SPD_SHI | ASYNC_SPD_WARP )
617 /* function prototypes for a FTDI serial converter */
618 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id);
619 static void ftdi_shutdown (struct usb_serial *serial);
620 static int ftdi_sio_port_probe (struct usb_serial_port *port);
621 static int ftdi_sio_port_remove (struct usb_serial_port *port);
622 static int ftdi_open (struct usb_serial_port *port, struct file *filp);
623 static void ftdi_close (struct usb_serial_port *port, struct file *filp);
624 static int ftdi_write (struct usb_serial_port *port, const unsigned char *buf, int count);
625 static int ftdi_write_room (struct usb_serial_port *port);
626 static int ftdi_chars_in_buffer (struct usb_serial_port *port);
627 static void ftdi_write_bulk_callback (struct urb *urb);
628 static void ftdi_read_bulk_callback (struct urb *urb);
629 static void ftdi_process_read (struct work_struct *work);
630 static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios * old);
631 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file);
632 static int ftdi_tiocmset (struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear);
633 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
634 static void ftdi_break_ctl (struct usb_serial_port *port, int break_state );
635 static void ftdi_throttle (struct usb_serial_port *port);
636 static void ftdi_unthrottle (struct usb_serial_port *port);
638 static unsigned short int ftdi_232am_baud_base_to_divisor (int baud, int base);
639 static unsigned short int ftdi_232am_baud_to_divisor (int baud);
640 static __u32 ftdi_232bm_baud_base_to_divisor (int baud, int base);
641 static __u32 ftdi_232bm_baud_to_divisor (int baud);
643 static struct usb_serial_driver ftdi_sio_device = {
645 .owner = THIS_MODULE,
648 .description = "FTDI USB Serial Device",
649 .usb_driver = &ftdi_driver ,
650 .id_table = id_table_combined,
651 .num_interrupt_in = 0,
655 .probe = ftdi_sio_probe,
656 .port_probe = ftdi_sio_port_probe,
657 .port_remove = ftdi_sio_port_remove,
660 .throttle = ftdi_throttle,
661 .unthrottle = ftdi_unthrottle,
663 .write_room = ftdi_write_room,
664 .chars_in_buffer = ftdi_chars_in_buffer,
665 .read_bulk_callback = ftdi_read_bulk_callback,
666 .write_bulk_callback = ftdi_write_bulk_callback,
667 .tiocmget = ftdi_tiocmget,
668 .tiocmset = ftdi_tiocmset,
670 .set_termios = ftdi_set_termios,
671 .break_ctl = ftdi_break_ctl,
672 .shutdown = ftdi_shutdown,
676 #define WDR_TIMEOUT 5000 /* default urb timeout */
677 #define WDR_SHORT_TIMEOUT 1000 /* shorter urb timeout */
679 /* High and low are for DTR, RTS etc etc */
683 /* number of outstanding urbs to prevent userspace DoS from happening */
684 #define URB_UPPER_LIMIT 42
687 * ***************************************************************************
689 * ***************************************************************************
692 static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base)
694 unsigned short int divisor;
695 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
696 if ((divisor3 & 0x7) == 7) divisor3 ++; // round x.7/8 up to x+1
697 divisor = divisor3 >> 3;
699 if (divisor3 == 1) divisor |= 0xc000; else // 0.125
700 if (divisor3 >= 4) divisor |= 0x4000; else // 0.5
701 if (divisor3 != 0) divisor |= 0x8000; // 0.25
702 if (divisor == 1) divisor = 0; /* special case for maximum baud rate */
706 static unsigned short int ftdi_232am_baud_to_divisor(int baud)
708 return(ftdi_232am_baud_base_to_divisor(baud, 48000000));
711 static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base)
713 static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
715 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
716 divisor = divisor3 >> 3;
717 divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
718 /* Deal with special cases for highest baud rates. */
719 if (divisor == 1) divisor = 0; else // 1.0
720 if (divisor == 0x4001) divisor = 1; // 1.5
724 static __u32 ftdi_232bm_baud_to_divisor(int baud)
726 return(ftdi_232bm_baud_base_to_divisor(baud, 48000000));
729 #define set_mctrl(port, set) update_mctrl((port), (set), 0)
730 #define clear_mctrl(port, clear) update_mctrl((port), 0, (clear))
732 static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned int clear)
734 struct ftdi_private *priv = usb_get_serial_port_data(port);
739 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
740 dbg("%s - DTR|RTS not being set|cleared", __FUNCTION__);
741 return 0; /* no change */
744 buf = kmalloc(1, GFP_NOIO);
749 clear &= ~set; /* 'set' takes precedence over 'clear' */
751 if (clear & TIOCM_DTR)
752 urb_value |= FTDI_SIO_SET_DTR_LOW;
753 if (clear & TIOCM_RTS)
754 urb_value |= FTDI_SIO_SET_RTS_LOW;
756 urb_value |= FTDI_SIO_SET_DTR_HIGH;
758 urb_value |= FTDI_SIO_SET_RTS_HIGH;
759 rv = usb_control_msg(port->serial->dev,
760 usb_sndctrlpipe(port->serial->dev, 0),
761 FTDI_SIO_SET_MODEM_CTRL_REQUEST,
762 FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
763 urb_value, priv->interface,
764 buf, 0, WDR_TIMEOUT);
768 err("%s Error from MODEM_CTRL urb: DTR %s, RTS %s",
770 (set & TIOCM_DTR) ? "HIGH" :
771 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
772 (set & TIOCM_RTS) ? "HIGH" :
773 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
775 dbg("%s - DTR %s, RTS %s", __FUNCTION__,
776 (set & TIOCM_DTR) ? "HIGH" :
777 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
778 (set & TIOCM_RTS) ? "HIGH" :
779 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
780 priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set;
786 static __u32 get_ftdi_divisor(struct usb_serial_port * port);
789 static int change_speed(struct usb_serial_port *port)
791 struct ftdi_private *priv = usb_get_serial_port_data(port);
795 __u32 urb_index_value;
798 buf = kmalloc(1, GFP_NOIO);
802 urb_index_value = get_ftdi_divisor(port);
803 urb_value = (__u16)urb_index_value;
804 urb_index = (__u16)(urb_index_value >> 16);
805 if (priv->interface) { /* FT2232C */
806 urb_index = (__u16)((urb_index << 8) | priv->interface);
809 rv = usb_control_msg(port->serial->dev,
810 usb_sndctrlpipe(port->serial->dev, 0),
811 FTDI_SIO_SET_BAUDRATE_REQUEST,
812 FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE,
813 urb_value, urb_index,
814 buf, 0, WDR_SHORT_TIMEOUT);
821 static __u32 get_ftdi_divisor(struct usb_serial_port * port)
822 { /* get_ftdi_divisor */
823 struct ftdi_private *priv = usb_get_serial_port_data(port);
829 * The logic involved in setting the baudrate can be cleanly split in 3 steps.
830 * Obtaining the actual baud rate is a little tricky since unix traditionally
831 * somehow ignored the possibility to set non-standard baud rates.
832 * 1. Standard baud rates are set in tty->termios->c_cflag
833 * 2. If these are not enough, you can set any speed using alt_speed as follows:
834 * - set tty->termios->c_cflag speed to B38400
835 * - set your real speed in tty->alt_speed; it gets ignored when
837 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
838 * flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP], this just
839 * sets alt_speed to (HI: 57600, VHI: 115200, SHI: 230400, WARP: 460800)
840 * ** Steps 1, 2 are done courtesy of tty_get_baud_rate
841 * 3. You can also set baud rate by setting custom divisor as follows
842 * - set tty->termios->c_cflag speed to B38400
843 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
844 * o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST
845 * o custom_divisor set to baud_base / your_new_baudrate
846 * ** Step 3 is done courtesy of code borrowed from serial.c - I should really
847 * spend some time and separate+move this common code to serial.c, it is
848 * replicated in nearly every serial driver you see.
851 /* 1. Get the baud rate from the tty settings, this observes alt_speed hack */
853 baud = tty_get_baud_rate(port->tty);
854 dbg("%s - tty_get_baud_rate reports speed %d", __FUNCTION__, baud);
856 /* 2. Observe async-compatible custom_divisor hack, update baudrate if needed */
859 ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
860 (priv->custom_divisor)) {
861 baud = priv->baud_base / priv->custom_divisor;
862 dbg("%s - custom divisor %d sets baud rate to %d", __FUNCTION__, priv->custom_divisor, baud);
865 /* 3. Convert baudrate to device-specific divisor */
867 if (!baud) baud = 9600;
868 switch(priv->chip_type) {
869 case SIO: /* SIO chip */
871 case 300: div_value = ftdi_sio_b300; break;
872 case 600: div_value = ftdi_sio_b600; break;
873 case 1200: div_value = ftdi_sio_b1200; break;
874 case 2400: div_value = ftdi_sio_b2400; break;
875 case 4800: div_value = ftdi_sio_b4800; break;
876 case 9600: div_value = ftdi_sio_b9600; break;
877 case 19200: div_value = ftdi_sio_b19200; break;
878 case 38400: div_value = ftdi_sio_b38400; break;
879 case 57600: div_value = ftdi_sio_b57600; break;
880 case 115200: div_value = ftdi_sio_b115200; break;
882 if (div_value == 0) {
883 dbg("%s - Baudrate (%d) requested is not supported", __FUNCTION__, baud);
884 div_value = ftdi_sio_b9600;
889 case FT8U232AM: /* 8U232AM chip */
890 if (baud <= 3000000) {
891 div_value = ftdi_232am_baud_to_divisor(baud);
893 dbg("%s - Baud rate too high!", __FUNCTION__);
895 div_value = ftdi_232am_baud_to_divisor(9600);
899 case FT232BM: /* FT232BM chip */
900 case FT2232C: /* FT2232C chip */
902 if (baud <= 3000000) {
903 div_value = ftdi_232bm_baud_to_divisor(baud);
905 dbg("%s - Baud rate too high!", __FUNCTION__);
906 div_value = ftdi_232bm_baud_to_divisor(9600);
911 } /* priv->chip_type */
914 dbg("%s - Baud rate set to %d (divisor 0x%lX) on chip %s",
915 __FUNCTION__, baud, (unsigned long)div_value,
916 ftdi_chip_name[priv->chip_type]);
919 tty_encode_baud_rate(port->tty, baud, baud);
924 static int get_serial_info(struct usb_serial_port * port, struct serial_struct __user * retinfo)
926 struct ftdi_private *priv = usb_get_serial_port_data(port);
927 struct serial_struct tmp;
931 memset(&tmp, 0, sizeof(tmp));
932 tmp.flags = priv->flags;
933 tmp.baud_base = priv->baud_base;
934 tmp.custom_divisor = priv->custom_divisor;
935 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
938 } /* get_serial_info */
941 static int set_serial_info(struct usb_serial_port * port, struct serial_struct __user * newinfo)
942 { /* set_serial_info */
943 struct ftdi_private *priv = usb_get_serial_port_data(port);
944 struct serial_struct new_serial;
945 struct ftdi_private old_priv;
947 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
951 /* Do error checking and permission checking */
953 if (!capable(CAP_SYS_ADMIN)) {
954 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
955 (priv->flags & ~ASYNC_USR_MASK)))
957 priv->flags = ((priv->flags & ~ASYNC_USR_MASK) |
958 (new_serial.flags & ASYNC_USR_MASK));
959 priv->custom_divisor = new_serial.custom_divisor;
963 if ((new_serial.baud_base != priv->baud_base) &&
964 (new_serial.baud_base < 9600))
967 /* Make the changes - these are privileged changes! */
969 priv->flags = ((priv->flags & ~ASYNC_FLAGS) |
970 (new_serial.flags & ASYNC_FLAGS));
971 priv->custom_divisor = new_serial.custom_divisor;
973 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
976 if ((old_priv.flags & ASYNC_SPD_MASK) !=
977 (priv->flags & ASYNC_SPD_MASK)) {
978 if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
979 port->tty->alt_speed = 57600;
980 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
981 port->tty->alt_speed = 115200;
982 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
983 port->tty->alt_speed = 230400;
984 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
985 port->tty->alt_speed = 460800;
987 port->tty->alt_speed = 0;
989 if (((old_priv.flags & ASYNC_SPD_MASK) !=
990 (priv->flags & ASYNC_SPD_MASK)) ||
991 (((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
992 (old_priv.custom_divisor != priv->custom_divisor))) {
998 } /* set_serial_info */
1001 /* Determine type of FTDI chip based on USB config and descriptor. */
1002 static void ftdi_determine_type(struct usb_serial_port *port)
1004 struct ftdi_private *priv = usb_get_serial_port_data(port);
1005 struct usb_serial *serial = port->serial;
1006 struct usb_device *udev = serial->dev;
1008 unsigned interfaces;
1010 /* Assume it is not the original SIO device for now. */
1011 priv->baud_base = 48000000 / 2;
1012 priv->write_offset = 0;
1014 version = le16_to_cpu(udev->descriptor.bcdDevice);
1015 interfaces = udev->actconfig->desc.bNumInterfaces;
1016 dbg("%s: bcdDevice = 0x%x, bNumInterfaces = %u", __FUNCTION__,
1017 version, interfaces);
1018 if (interfaces > 1) {
1021 /* Multiple interfaces. Assume FT2232C. */
1022 priv->chip_type = FT2232C;
1023 /* Determine interface code. */
1024 inter = serial->interface->altsetting->desc.bInterfaceNumber;
1026 priv->interface = PIT_SIOA;
1028 priv->interface = PIT_SIOB;
1030 /* BM-type devices have a bug where bcdDevice gets set
1031 * to 0x200 when iSerialNumber is 0. */
1032 if (version < 0x500) {
1033 dbg("%s: something fishy - bcdDevice too low for multi-interface device",
1036 } else if (version < 0x200) {
1037 /* Old device. Assume its the original SIO. */
1038 priv->chip_type = SIO;
1039 priv->baud_base = 12000000 / 16;
1040 priv->write_offset = 1;
1041 } else if (version < 0x400) {
1042 /* Assume its an FT8U232AM (or FT8U245AM) */
1043 /* (It might be a BM because of the iSerialNumber bug,
1044 * but it will still work as an AM device.) */
1045 priv->chip_type = FT8U232AM;
1046 } else if (version < 0x600) {
1047 /* Assume its an FT232BM (or FT245BM) */
1048 priv->chip_type = FT232BM;
1050 /* Assume its an FT232R */
1051 priv->chip_type = FT232RL;
1053 info("Detected %s", ftdi_chip_name[priv->chip_type]);
1058 * ***************************************************************************
1060 * ***************************************************************************
1063 static ssize_t show_latency_timer(struct device *dev, struct device_attribute *attr, char *buf)
1065 struct usb_serial_port *port = to_usb_serial_port(dev);
1066 struct ftdi_private *priv = usb_get_serial_port_data(port);
1067 struct usb_device *udev = port->serial->dev;
1068 unsigned short latency = 0;
1072 dbg("%s",__FUNCTION__);
1074 rv = usb_control_msg(udev,
1075 usb_rcvctrlpipe(udev, 0),
1076 FTDI_SIO_GET_LATENCY_TIMER_REQUEST,
1077 FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE,
1079 (char*) &latency, 1, WDR_TIMEOUT);
1082 dev_err(dev, "Unable to read latency timer: %i\n", rv);
1085 return sprintf(buf, "%i\n", latency);
1088 /* Write a new value of the latency timer, in units of milliseconds. */
1089 static ssize_t store_latency_timer(struct device *dev, struct device_attribute *attr, const char *valbuf,
1092 struct usb_serial_port *port = to_usb_serial_port(dev);
1093 struct ftdi_private *priv = usb_get_serial_port_data(port);
1094 struct usb_device *udev = port->serial->dev;
1096 int v = simple_strtoul(valbuf, NULL, 10);
1099 dbg("%s: setting latency timer = %i", __FUNCTION__, v);
1101 rv = usb_control_msg(udev,
1102 usb_sndctrlpipe(udev, 0),
1103 FTDI_SIO_SET_LATENCY_TIMER_REQUEST,
1104 FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE,
1106 buf, 0, WDR_TIMEOUT);
1109 dev_err(dev, "Unable to write latency timer: %i\n", rv);
1116 /* Write an event character directly to the FTDI register. The ASCII
1117 value is in the low 8 bits, with the enable bit in the 9th bit. */
1118 static ssize_t store_event_char(struct device *dev, struct device_attribute *attr, const char *valbuf,
1121 struct usb_serial_port *port = to_usb_serial_port(dev);
1122 struct ftdi_private *priv = usb_get_serial_port_data(port);
1123 struct usb_device *udev = port->serial->dev;
1125 int v = simple_strtoul(valbuf, NULL, 10);
1128 dbg("%s: setting event char = %i", __FUNCTION__, v);
1130 rv = usb_control_msg(udev,
1131 usb_sndctrlpipe(udev, 0),
1132 FTDI_SIO_SET_EVENT_CHAR_REQUEST,
1133 FTDI_SIO_SET_EVENT_CHAR_REQUEST_TYPE,
1135 buf, 0, WDR_TIMEOUT);
1138 dbg("Unable to write event character: %i", rv);
1145 static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer, store_latency_timer);
1146 static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char);
1148 static int create_sysfs_attrs(struct usb_serial_port *port)
1150 struct ftdi_private *priv = usb_get_serial_port_data(port);
1153 dbg("%s",__FUNCTION__);
1155 /* XXX I've no idea if the original SIO supports the event_char
1156 * sysfs parameter, so I'm playing it safe. */
1157 if (priv->chip_type != SIO) {
1158 dbg("sysfs attributes for %s", ftdi_chip_name[priv->chip_type]);
1159 retval = device_create_file(&port->dev, &dev_attr_event_char);
1161 (priv->chip_type == FT232BM ||
1162 priv->chip_type == FT2232C ||
1163 priv->chip_type == FT232RL)) {
1164 retval = device_create_file(&port->dev,
1165 &dev_attr_latency_timer);
1171 static void remove_sysfs_attrs(struct usb_serial_port *port)
1173 struct ftdi_private *priv = usb_get_serial_port_data(port);
1175 dbg("%s",__FUNCTION__);
1177 /* XXX see create_sysfs_attrs */
1178 if (priv->chip_type != SIO) {
1179 device_remove_file(&port->dev, &dev_attr_event_char);
1180 if (priv->chip_type == FT232BM ||
1181 priv->chip_type == FT2232C ||
1182 priv->chip_type == FT232RL) {
1183 device_remove_file(&port->dev, &dev_attr_latency_timer);
1190 * ***************************************************************************
1191 * FTDI driver specific functions
1192 * ***************************************************************************
1195 /* Probe function to check for special devices */
1196 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id)
1198 struct ftdi_sio_quirk *quirk = (struct ftdi_sio_quirk *)id->driver_info;
1200 if (quirk && quirk->probe) {
1201 int ret = quirk->probe(serial);
1206 usb_set_serial_data(serial, (void *)id->driver_info);
1211 static int ftdi_sio_port_probe(struct usb_serial_port *port)
1213 struct ftdi_private *priv;
1214 struct ftdi_sio_quirk *quirk = usb_get_serial_data(port->serial);
1217 dbg("%s",__FUNCTION__);
1219 priv = kzalloc(sizeof(struct ftdi_private), GFP_KERNEL);
1221 err("%s- kmalloc(%Zd) failed.", __FUNCTION__, sizeof(struct ftdi_private));
1225 spin_lock_init(&priv->rx_lock);
1226 spin_lock_init(&priv->tx_lock);
1227 init_waitqueue_head(&priv->delta_msr_wait);
1228 /* This will push the characters through immediately rather
1229 than queue a task to deliver them */
1230 priv->flags = ASYNC_LOW_LATENCY;
1232 if (quirk && quirk->port_probe)
1233 quirk->port_probe(priv);
1235 /* Increase the size of read buffers */
1236 kfree(port->bulk_in_buffer);
1237 port->bulk_in_buffer = kmalloc (BUFSZ, GFP_KERNEL);
1238 if (!port->bulk_in_buffer) {
1242 if (port->read_urb) {
1243 port->read_urb->transfer_buffer = port->bulk_in_buffer;
1244 port->read_urb->transfer_buffer_length = BUFSZ;
1247 INIT_DELAYED_WORK(&priv->rx_work, ftdi_process_read);
1250 /* Free port's existing write urb and transfer buffer. */
1251 if (port->write_urb) {
1252 usb_free_urb (port->write_urb);
1253 port->write_urb = NULL;
1255 kfree(port->bulk_out_buffer);
1256 port->bulk_out_buffer = NULL;
1258 usb_set_serial_port_data(port, priv);
1260 ftdi_determine_type (port);
1261 create_sysfs_attrs(port);
1265 /* Setup for the USB-UIRT device, which requires hardwired
1266 * baudrate (38400 gets mapped to 312500) */
1267 /* Called from usbserial:serial_probe */
1268 static void ftdi_USB_UIRT_setup (struct ftdi_private *priv)
1270 dbg("%s",__FUNCTION__);
1272 priv->flags |= ASYNC_SPD_CUST;
1273 priv->custom_divisor = 77;
1274 priv->force_baud = 38400;
1275 } /* ftdi_USB_UIRT_setup */
1277 /* Setup for the HE-TIRA1 device, which requires hardwired
1278 * baudrate (38400 gets mapped to 100000) and RTS-CTS enabled. */
1279 static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv)
1281 dbg("%s",__FUNCTION__);
1283 priv->flags |= ASYNC_SPD_CUST;
1284 priv->custom_divisor = 240;
1285 priv->force_baud = 38400;
1286 priv->force_rtscts = 1;
1287 } /* ftdi_HE_TIRA1_setup */
1290 * First port on JTAG adaptors such as Olimex arm-usb-ocd or the FIC/OpenMoko
1291 * Neo1973 Debug Board is reserved for JTAG interface and can be accessed from
1292 * userspace using openocd.
1294 static int ftdi_jtag_probe(struct usb_serial *serial)
1296 struct usb_device *udev = serial->dev;
1297 struct usb_interface *interface = serial->interface;
1299 dbg("%s",__FUNCTION__);
1301 if (interface == udev->actconfig->interface[0]) {
1302 info("Ignoring serial port reserved for JTAG");
1309 /* ftdi_shutdown is called from usbserial:usb_serial_disconnect
1310 * it is called when the usb device is disconnected
1312 * usbserial:usb_serial_disconnect
1313 * calls __serial_close for each open of the port
1314 * shutdown is called then (ie ftdi_shutdown)
1316 static void ftdi_shutdown (struct usb_serial *serial)
1318 dbg("%s", __FUNCTION__);
1321 static int ftdi_sio_port_remove(struct usb_serial_port *port)
1323 struct ftdi_private *priv = usb_get_serial_port_data(port);
1325 dbg("%s", __FUNCTION__);
1327 remove_sysfs_attrs(port);
1329 /* all open ports are closed at this point
1330 * (by usbserial.c:__serial_close, which calls ftdi_close)
1334 usb_set_serial_port_data(port, NULL);
1341 static int ftdi_open (struct usb_serial_port *port, struct file *filp)
1343 struct usb_device *dev = port->serial->dev;
1344 struct ftdi_private *priv = usb_get_serial_port_data(port);
1345 unsigned long flags;
1348 char buf[1]; /* Needed for the usb_control_msg I think */
1350 dbg("%s", __FUNCTION__);
1352 spin_lock_irqsave(&priv->tx_lock, flags);
1354 spin_unlock_irqrestore(&priv->tx_lock, flags);
1355 spin_lock_irqsave(&priv->rx_lock, flags);
1357 spin_unlock_irqrestore(&priv->rx_lock, flags);
1360 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1362 /* No error checking for this (will get errors later anyway) */
1363 /* See ftdi_sio.h for description of what is reset */
1364 usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1365 FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE,
1367 priv->interface, buf, 0, WDR_TIMEOUT);
1369 /* Termios defaults are set by usb_serial_init. We don't change
1370 port->tty->termios - this would loose speed settings, etc.
1371 This is same behaviour as serial.c/rs_open() - Kuba */
1373 /* ftdi_set_termios will send usb control messages */
1375 ftdi_set_termios(port, port->tty->termios);
1377 /* FIXME: Flow control might be enabled, so it should be checked -
1378 we have no control of defaults! */
1379 /* Turn on RTS and DTR since we are not flow controlling by default */
1380 set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1383 spin_lock_irqsave(&priv->rx_lock, flags);
1384 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
1385 spin_unlock_irqrestore(&priv->rx_lock, flags);
1387 /* Start reading from the device */
1388 priv->rx_processed = 0;
1389 usb_fill_bulk_urb(port->read_urb, dev,
1390 usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress),
1391 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
1392 ftdi_read_bulk_callback, port);
1393 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
1395 err("%s - failed submitting read urb, error %d", __FUNCTION__, result);
1404 * usbserial:__serial_close only calls ftdi_close if the point is open
1406 * This only gets called when it is the last close
1411 static void ftdi_close (struct usb_serial_port *port, struct file *filp)
1413 unsigned int c_cflag = port->tty->termios->c_cflag;
1414 struct ftdi_private *priv = usb_get_serial_port_data(port);
1417 dbg("%s", __FUNCTION__);
1419 if (c_cflag & HUPCL){
1420 /* Disable flow control */
1421 if (usb_control_msg(port->serial->dev,
1422 usb_sndctrlpipe(port->serial->dev, 0),
1423 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1424 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1425 0, priv->interface, buf, 0,
1427 err("error from flowcontrol urb");
1430 /* drop RTS and DTR */
1431 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1432 } /* Note change no line if hupcl is off */
1434 /* cancel any scheduled reading */
1435 cancel_delayed_work(&priv->rx_work);
1436 flush_scheduled_work();
1438 /* shutdown our bulk read */
1439 usb_kill_urb(port->read_urb);
1444 /* The SIO requires the first byte to have:
1447 * B2..7 length of message excluding byte 0
1449 * The new devices do not require this byte
1451 static int ftdi_write (struct usb_serial_port *port,
1452 const unsigned char *buf, int count)
1454 struct ftdi_private *priv = usb_get_serial_port_data(port);
1456 unsigned char *buffer;
1457 int data_offset ; /* will be 1 for the SIO and 0 otherwise */
1460 unsigned long flags;
1462 dbg("%s port %d, %d bytes", __FUNCTION__, port->number, count);
1465 dbg("write request of 0 bytes");
1468 spin_lock_irqsave(&priv->tx_lock, flags);
1469 if (priv->tx_outstanding_urbs > URB_UPPER_LIMIT) {
1470 spin_unlock_irqrestore(&priv->tx_lock, flags);
1471 dbg("%s - write limit hit\n", __FUNCTION__);
1474 priv->tx_outstanding_urbs++;
1475 spin_unlock_irqrestore(&priv->tx_lock, flags);
1477 data_offset = priv->write_offset;
1478 dbg("data_offset set to %d",data_offset);
1480 /* Determine total transfer size */
1481 transfer_size = count;
1482 if (data_offset > 0) {
1483 /* Original sio needs control bytes too... */
1484 transfer_size += (data_offset *
1485 ((count + (PKTSZ - 1 - data_offset)) /
1486 (PKTSZ - data_offset)));
1489 buffer = kmalloc (transfer_size, GFP_ATOMIC);
1491 err("%s ran out of kernel memory for urb ...", __FUNCTION__);
1493 goto error_no_buffer;
1496 urb = usb_alloc_urb(0, GFP_ATOMIC);
1498 err("%s - no more free urbs", __FUNCTION__);
1504 if (data_offset > 0) {
1505 /* Original sio requires control byte at start of each packet. */
1506 int user_pktsz = PKTSZ - data_offset;
1508 unsigned char *first_byte = buffer;
1509 const unsigned char *current_position = buf;
1512 if (user_pktsz > todo) {
1515 /* Write the control byte at the front of the packet*/
1516 *first_byte = 1 | ((user_pktsz) << 2);
1517 /* Copy data for packet */
1518 memcpy (first_byte + data_offset,
1519 current_position, user_pktsz);
1520 first_byte += user_pktsz + data_offset;
1521 current_position += user_pktsz;
1525 /* No control byte required. */
1526 /* Copy in the data to send */
1527 memcpy (buffer, buf, count);
1530 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, buffer);
1532 /* fill the buffer and send it */
1533 usb_fill_bulk_urb(urb, port->serial->dev,
1534 usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress),
1535 buffer, transfer_size,
1536 ftdi_write_bulk_callback, port);
1538 status = usb_submit_urb(urb, GFP_ATOMIC);
1540 err("%s - failed submitting write urb, error %d", __FUNCTION__, status);
1544 spin_lock_irqsave(&priv->tx_lock, flags);
1545 priv->tx_outstanding_bytes += count;
1546 priv->tx_bytes += count;
1547 spin_unlock_irqrestore(&priv->tx_lock, flags);
1550 /* we are done with this urb, so let the host driver
1551 * really free it when it is finished with it */
1554 dbg("%s write returning: %d", __FUNCTION__, count);
1561 spin_lock_irqsave(&priv->tx_lock, flags);
1562 priv->tx_outstanding_urbs--;
1563 spin_unlock_irqrestore(&priv->tx_lock, flags);
1568 /* This function may get called when the device is closed */
1570 static void ftdi_write_bulk_callback (struct urb *urb)
1572 unsigned long flags;
1573 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1574 struct ftdi_private *priv;
1575 int data_offset; /* will be 1 for the SIO and 0 otherwise */
1576 unsigned long countback;
1577 int status = urb->status;
1579 /* free up the transfer buffer, as usb_free_urb() does not do this */
1580 kfree (urb->transfer_buffer);
1582 dbg("%s - port %d", __FUNCTION__, port->number);
1585 dbg("nonzero write bulk status received: %d", status);
1589 priv = usb_get_serial_port_data(port);
1591 dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
1594 /* account for transferred data */
1595 countback = urb->actual_length;
1596 data_offset = priv->write_offset;
1597 if (data_offset > 0) {
1598 /* Subtract the control bytes */
1599 countback -= (data_offset * ((countback + (PKTSZ - 1)) / PKTSZ));
1601 spin_lock_irqsave(&priv->tx_lock, flags);
1602 --priv->tx_outstanding_urbs;
1603 priv->tx_outstanding_bytes -= countback;
1604 spin_unlock_irqrestore(&priv->tx_lock, flags);
1606 usb_serial_port_softint(port);
1607 } /* ftdi_write_bulk_callback */
1610 static int ftdi_write_room( struct usb_serial_port *port )
1612 struct ftdi_private *priv = usb_get_serial_port_data(port);
1614 unsigned long flags;
1616 dbg("%s - port %d", __FUNCTION__, port->number);
1618 spin_lock_irqsave(&priv->tx_lock, flags);
1619 if (priv->tx_outstanding_urbs < URB_UPPER_LIMIT) {
1621 * We really can take anything the user throws at us
1622 * but let's pick a nice big number to tell the tty
1623 * layer that we have lots of free space
1629 spin_unlock_irqrestore(&priv->tx_lock, flags);
1631 } /* ftdi_write_room */
1634 static int ftdi_chars_in_buffer (struct usb_serial_port *port)
1635 { /* ftdi_chars_in_buffer */
1636 struct ftdi_private *priv = usb_get_serial_port_data(port);
1638 unsigned long flags;
1640 dbg("%s - port %d", __FUNCTION__, port->number);
1642 spin_lock_irqsave(&priv->tx_lock, flags);
1643 buffered = (int)priv->tx_outstanding_bytes;
1644 spin_unlock_irqrestore(&priv->tx_lock, flags);
1646 err("%s outstanding tx bytes is negative!", __FUNCTION__);
1650 } /* ftdi_chars_in_buffer */
1654 static void ftdi_read_bulk_callback (struct urb *urb)
1655 { /* ftdi_read_bulk_callback */
1656 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1657 struct tty_struct *tty;
1658 struct ftdi_private *priv;
1659 unsigned long countread;
1660 unsigned long flags;
1661 int status = urb->status;
1663 if (urb->number_of_packets > 0) {
1664 err("%s transfer_buffer_length %d actual_length %d number of packets %d",__FUNCTION__,
1665 urb->transfer_buffer_length, urb->actual_length, urb->number_of_packets );
1666 err("%s transfer_flags %x ", __FUNCTION__,urb->transfer_flags );
1669 dbg("%s - port %d", __FUNCTION__, port->number);
1671 if (port->open_count <= 0)
1676 dbg("%s - bad tty pointer - exiting",__FUNCTION__);
1680 priv = usb_get_serial_port_data(port);
1682 dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
1686 if (urb != port->read_urb) {
1687 err("%s - Not my urb!", __FUNCTION__);
1691 /* This will happen at close every time so it is a dbg not an err */
1692 dbg("(this is ok on close) nonzero read bulk status received: "
1697 /* count data bytes, but not status bytes */
1698 countread = urb->actual_length;
1699 countread -= 2 * ((countread + (PKTSZ - 1)) / PKTSZ);
1700 spin_lock_irqsave(&priv->rx_lock, flags);
1701 priv->rx_bytes += countread;
1702 spin_unlock_irqrestore(&priv->rx_lock, flags);
1704 ftdi_process_read(&priv->rx_work.work);
1706 } /* ftdi_read_bulk_callback */
1709 static void ftdi_process_read (struct work_struct *work)
1710 { /* ftdi_process_read */
1711 struct ftdi_private *priv =
1712 container_of(work, struct ftdi_private, rx_work.work);
1713 struct usb_serial_port *port = priv->port;
1715 struct tty_struct *tty;
1717 unsigned char *data;
1723 unsigned long flags;
1725 dbg("%s - port %d", __FUNCTION__, port->number);
1727 if (port->open_count <= 0)
1732 dbg("%s - bad tty pointer - exiting",__FUNCTION__);
1736 priv = usb_get_serial_port_data(port);
1738 dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
1742 urb = port->read_urb;
1744 dbg("%s - bad read_urb pointer - exiting", __FUNCTION__);
1748 data = urb->transfer_buffer;
1750 if (priv->rx_processed) {
1751 dbg("%s - already processed: %d bytes, %d remain", __FUNCTION__,
1753 urb->actual_length - priv->rx_processed);
1755 /* The first two bytes of every read packet are status */
1756 if (urb->actual_length > 2) {
1757 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
1759 dbg("Status only: %03oo %03oo",data[0],data[1]);
1764 /* TO DO -- check for hung up line and handle appropriately: */
1766 /* See acm.c - you do a tty_hangup - eg tty_hangup(tty) */
1767 /* if CD is dropped and the line is not CLOCAL then we should hangup */
1770 for (packet_offset = priv->rx_processed; packet_offset < urb->actual_length; packet_offset += PKTSZ) {
1773 /* Compare new line status to the old one, signal if different */
1774 /* N.B. packet may be processed more than once, but differences
1775 * are only processed once. */
1777 char new_status = data[packet_offset+0] & FTDI_STATUS_B0_MASK;
1778 if (new_status != priv->prev_status) {
1779 priv->diff_status |= new_status ^ priv->prev_status;
1780 wake_up_interruptible(&priv->delta_msr_wait);
1781 priv->prev_status = new_status;
1785 length = min(PKTSZ, urb->actual_length-packet_offset)-2;
1787 err("%s - bad packet length: %d", __FUNCTION__, length+2);
1791 if (priv->rx_flags & THROTTLED) {
1792 dbg("%s - throttled", __FUNCTION__);
1795 if (tty_buffer_request_room(tty, length) < length) {
1796 /* break out & wait for throttling/unthrottling to happen */
1797 dbg("%s - receive room low", __FUNCTION__);
1801 /* Handle errors and break */
1802 error_flag = TTY_NORMAL;
1803 /* Although the device uses a bitmask and hence can have multiple */
1804 /* errors on a packet - the order here sets the priority the */
1805 /* error is returned to the tty layer */
1807 if ( data[packet_offset+1] & FTDI_RS_OE ) {
1808 error_flag = TTY_OVERRUN;
1809 dbg("OVERRRUN error");
1811 if ( data[packet_offset+1] & FTDI_RS_BI ) {
1812 error_flag = TTY_BREAK;
1813 dbg("BREAK received");
1815 if ( data[packet_offset+1] & FTDI_RS_PE ) {
1816 error_flag = TTY_PARITY;
1817 dbg("PARITY error");
1819 if ( data[packet_offset+1] & FTDI_RS_FE ) {
1820 error_flag = TTY_FRAME;
1821 dbg("FRAMING error");
1824 for (i = 2; i < length+2; i++) {
1825 /* Note that the error flag is duplicated for
1826 every character received since we don't know
1827 which character it applied to */
1828 tty_insert_flip_char(tty, data[packet_offset+i], error_flag);
1833 #ifdef NOT_CORRECT_BUT_KEEPING_IT_FOR_NOW
1834 /* if a parity error is detected you get status packets forever
1835 until a character is sent without a parity error.
1836 This doesn't work well since the application receives a never
1837 ending stream of bad data - even though new data hasn't been sent.
1838 Therefore I (bill) have taken this out.
1839 However - this might make sense for framing errors and so on
1840 so I am leaving the code in for now.
1843 if (error_flag != TTY_NORMAL){
1844 dbg("error_flag is not normal");
1845 /* In this case it is just status - if that is an error send a bad character */
1846 if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
1847 tty_flip_buffer_push(tty);
1849 tty_insert_flip_char(tty, 0xff, error_flag);
1854 } /* "for(packet_offset=0..." */
1858 tty_flip_buffer_push(tty);
1861 if (packet_offset < urb->actual_length) {
1862 /* not completely processed - record progress */
1863 priv->rx_processed = packet_offset;
1864 dbg("%s - incomplete, %d bytes processed, %d remain",
1865 __FUNCTION__, packet_offset,
1866 urb->actual_length - packet_offset);
1867 /* check if we were throttled while processing */
1868 spin_lock_irqsave(&priv->rx_lock, flags);
1869 if (priv->rx_flags & THROTTLED) {
1870 priv->rx_flags |= ACTUALLY_THROTTLED;
1871 spin_unlock_irqrestore(&priv->rx_lock, flags);
1872 dbg("%s - deferring remainder until unthrottled",
1876 spin_unlock_irqrestore(&priv->rx_lock, flags);
1877 /* if the port is closed stop trying to read */
1878 if (port->open_count > 0){
1879 /* delay processing of remainder */
1880 schedule_delayed_work(&priv->rx_work, 1);
1882 dbg("%s - port is closed", __FUNCTION__);
1887 /* urb is completely processed */
1888 priv->rx_processed = 0;
1890 /* if the port is closed stop trying to read */
1891 if (port->open_count > 0){
1892 /* Continue trying to always read */
1893 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
1894 usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress),
1895 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
1896 ftdi_read_bulk_callback, port);
1898 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1900 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1904 } /* ftdi_process_read */
1907 static void ftdi_break_ctl( struct usb_serial_port *port, int break_state )
1909 struct ftdi_private *priv = usb_get_serial_port_data(port);
1910 __u16 urb_value = 0;
1913 /* break_state = -1 to turn on break, and 0 to turn off break */
1914 /* see drivers/char/tty_io.c to see it used */
1915 /* last_set_data_urb_value NEVER has the break bit set in it */
1918 urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK;
1920 urb_value = priv->last_set_data_urb_value;
1924 if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0),
1925 FTDI_SIO_SET_DATA_REQUEST,
1926 FTDI_SIO_SET_DATA_REQUEST_TYPE,
1927 urb_value , priv->interface,
1928 buf, 0, WDR_TIMEOUT) < 0) {
1929 err("%s FAILED to enable/disable break state (state was %d)", __FUNCTION__,break_state);
1932 dbg("%s break state is %d - urb is %d", __FUNCTION__,break_state, urb_value);
1937 /* old_termios contains the original termios settings and tty->termios contains
1938 * the new setting to be used
1939 * WARNING: set_termios calls this with old_termios in kernel space
1942 static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
1943 { /* ftdi_termios */
1944 struct usb_device *dev = port->serial->dev;
1945 struct ftdi_private *priv = usb_get_serial_port_data(port);
1946 struct ktermios *termios = port->tty->termios;
1947 unsigned int cflag = termios->c_cflag;
1948 __u16 urb_value; /* will hold the new flags */
1949 char buf[1]; /* Perhaps I should dynamically alloc this? */
1951 // Added for xon/xoff support
1952 unsigned int iflag = termios->c_iflag;
1953 unsigned char vstop;
1954 unsigned char vstart;
1956 dbg("%s", __FUNCTION__);
1958 /* Force baud rate if this device requires it, unless it is set to B0. */
1959 if (priv->force_baud && ((termios->c_cflag & CBAUD) != B0)) {
1960 dbg("%s: forcing baud rate for this device", __FUNCTION__);
1961 tty_encode_baud_rate(port->tty, priv->force_baud,
1965 /* Force RTS-CTS if this device requires it. */
1966 if (priv->force_rtscts) {
1967 dbg("%s: forcing rtscts for this device", __FUNCTION__);
1968 termios->c_cflag |= CRTSCTS;
1971 cflag = termios->c_cflag;
1973 /* FIXME -For this cut I don't care if the line is really changing or
1974 not - so just do the change regardless - should be able to
1975 compare old_termios and tty->termios */
1976 /* NOTE These routines can get interrupted by
1977 ftdi_sio_read_bulk_callback - need to examine what this
1978 means - don't see any problems yet */
1980 /* Set number of data bits, parity, stop bits */
1982 termios->c_cflag &= ~CMSPAR;
1985 urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 :
1986 FTDI_SIO_SET_DATA_STOP_BITS_1);
1987 urb_value |= (cflag & PARENB ?
1988 (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD :
1989 FTDI_SIO_SET_DATA_PARITY_EVEN) :
1990 FTDI_SIO_SET_DATA_PARITY_NONE);
1991 if (cflag & CSIZE) {
1992 switch (cflag & CSIZE) {
1993 case CS5: urb_value |= 5; dbg("Setting CS5"); break;
1994 case CS6: urb_value |= 6; dbg("Setting CS6"); break;
1995 case CS7: urb_value |= 7; dbg("Setting CS7"); break;
1996 case CS8: urb_value |= 8; dbg("Setting CS8"); break;
1998 err("CSIZE was set but not CS5-CS8");
2002 /* This is needed by the break command since it uses the same command - but is
2003 * or'ed with this value */
2004 priv->last_set_data_urb_value = urb_value;
2006 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
2007 FTDI_SIO_SET_DATA_REQUEST,
2008 FTDI_SIO_SET_DATA_REQUEST_TYPE,
2009 urb_value , priv->interface,
2010 buf, 0, WDR_SHORT_TIMEOUT) < 0) {
2011 err("%s FAILED to set databits/stopbits/parity", __FUNCTION__);
2014 /* Now do the baudrate */
2015 if ((cflag & CBAUD) == B0 ) {
2016 /* Disable flow control */
2017 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
2018 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
2019 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
2021 buf, 0, WDR_TIMEOUT) < 0) {
2022 err("%s error from disable flowcontrol urb", __FUNCTION__);
2024 /* Drop RTS and DTR */
2025 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
2027 /* set the baudrate determined before */
2028 if (change_speed(port)) {
2029 err("%s urb failed to set baudrate", __FUNCTION__);
2031 /* Ensure RTS and DTR are raised when baudrate changed from 0 */
2032 if (!old_termios || (old_termios->c_cflag & CBAUD) == B0) {
2033 set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
2037 /* Set flow control */
2038 /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */
2039 if (cflag & CRTSCTS) {
2040 dbg("%s Setting to CRTSCTS flow control", __FUNCTION__);
2041 if (usb_control_msg(dev,
2042 usb_sndctrlpipe(dev, 0),
2043 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
2044 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
2045 0 , (FTDI_SIO_RTS_CTS_HS | priv->interface),
2046 buf, 0, WDR_TIMEOUT) < 0) {
2047 err("urb failed to set to rts/cts flow control");
2054 * Check the IXOFF status in the iflag component of the termios structure
2055 * if IXOFF is not set, the pre-xon/xoff code is executed.
2057 if (iflag & IXOFF) {
2058 dbg("%s request to enable xonxoff iflag=%04x",__FUNCTION__,iflag);
2059 // Try to enable the XON/XOFF on the ftdi_sio
2060 // Set the vstart and vstop -- could have been done up above where
2061 // a lot of other dereferencing is done but that would be very
2062 // inefficient as vstart and vstop are not always needed
2063 vstart = termios->c_cc[VSTART];
2064 vstop = termios->c_cc[VSTOP];
2065 urb_value=(vstop << 8) | (vstart);
2067 if (usb_control_msg(dev,
2068 usb_sndctrlpipe(dev, 0),
2069 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
2070 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
2071 urb_value , (FTDI_SIO_XON_XOFF_HS
2073 buf, 0, WDR_TIMEOUT) < 0) {
2074 err("urb failed to set to xon/xoff flow control");
2077 /* else clause to only run if cfag ! CRTSCTS and iflag ! XOFF */
2078 /* CHECKME Assuming XON/XOFF handled by tty stack - not by device */
2079 dbg("%s Turning off hardware flow control", __FUNCTION__);
2080 if (usb_control_msg(dev,
2081 usb_sndctrlpipe(dev, 0),
2082 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
2083 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
2085 buf, 0, WDR_TIMEOUT) < 0) {
2086 err("urb failed to clear flow control");
2092 } /* ftdi_termios */
2095 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file)
2097 struct ftdi_private *priv = usb_get_serial_port_data(port);
2098 unsigned char buf[2];
2101 dbg("%s TIOCMGET", __FUNCTION__);
2102 switch (priv->chip_type) {
2104 /* Request the status from the device */
2105 if ((ret = usb_control_msg(port->serial->dev,
2106 usb_rcvctrlpipe(port->serial->dev, 0),
2107 FTDI_SIO_GET_MODEM_STATUS_REQUEST,
2108 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
2110 buf, 1, WDR_TIMEOUT)) < 0 ) {
2111 err("%s Could not get modem status of device - err: %d", __FUNCTION__,
2120 /* the 8U232AM returns a two byte value (the sio is a 1 byte value) - in the same
2121 format as the data returned from the in point */
2122 if ((ret = usb_control_msg(port->serial->dev,
2123 usb_rcvctrlpipe(port->serial->dev, 0),
2124 FTDI_SIO_GET_MODEM_STATUS_REQUEST,
2125 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
2127 buf, 2, WDR_TIMEOUT)) < 0 ) {
2128 err("%s Could not get modem status of device - err: %d", __FUNCTION__,
2138 return (buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) |
2139 (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) |
2140 (buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) |
2141 (buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0) |
2145 static int ftdi_tiocmset(struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear)
2147 dbg("%s TIOCMSET", __FUNCTION__);
2148 return update_mctrl(port, set, clear);
2152 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
2154 struct ftdi_private *priv = usb_get_serial_port_data(port);
2156 dbg("%s cmd 0x%04x", __FUNCTION__, cmd);
2158 /* Based on code from acm.c and others */
2161 case TIOCGSERIAL: /* gets serial port data */
2162 return get_serial_info(port, (struct serial_struct __user *) arg);
2164 case TIOCSSERIAL: /* sets serial port data */
2165 return set_serial_info(port, (struct serial_struct __user *) arg);
2168 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
2169 * - mask passed in arg for lines of interest
2170 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
2171 * Caller should use TIOCGICOUNT to see which one it was.
2173 * This code is borrowed from linux/drivers/char/serial.c
2176 while (priv != NULL) {
2177 interruptible_sleep_on(&priv->delta_msr_wait);
2178 /* see if a signal did it */
2179 if (signal_pending(current))
2180 return -ERESTARTSYS;
2182 char diff = priv->diff_status;
2185 return -EIO; /* no change => error */
2188 /* Consume all events */
2189 priv->diff_status = 0;
2191 /* Return 0 if caller wanted to know about these bits */
2192 if ( ((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) ||
2193 ((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) ||
2194 ((arg & TIOCM_CD) && (diff & FTDI_RS0_RLSD)) ||
2195 ((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS)) ) {
2199 * Otherwise caller can't care less about what happened,
2200 * and so we continue to wait for more events.
2212 /* This is not necessarily an error - turns out the higher layers will do
2213 * some ioctls itself (see comment above)
2215 dbg("%s arg not supported - it was 0x%04x - check /usr/include/asm/ioctls.h", __FUNCTION__, cmd);
2217 return(-ENOIOCTLCMD);
2221 static void ftdi_throttle (struct usb_serial_port *port)
2223 struct ftdi_private *priv = usb_get_serial_port_data(port);
2224 unsigned long flags;
2226 dbg("%s - port %d", __FUNCTION__, port->number);
2228 spin_lock_irqsave(&priv->rx_lock, flags);
2229 priv->rx_flags |= THROTTLED;
2230 spin_unlock_irqrestore(&priv->rx_lock, flags);
2234 static void ftdi_unthrottle (struct usb_serial_port *port)
2236 struct ftdi_private *priv = usb_get_serial_port_data(port);
2237 int actually_throttled;
2238 unsigned long flags;
2240 dbg("%s - port %d", __FUNCTION__, port->number);
2242 spin_lock_irqsave(&priv->rx_lock, flags);
2243 actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED;
2244 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
2245 spin_unlock_irqrestore(&priv->rx_lock, flags);
2247 if (actually_throttled)
2248 schedule_delayed_work(&priv->rx_work, 0);
2251 static int __init ftdi_init (void)
2255 dbg("%s", __FUNCTION__);
2256 if (vendor > 0 && product > 0) {
2257 /* Add user specified VID/PID to reserved element of table. */
2259 for (i = 0; id_table_combined[i].idVendor; i++)
2261 id_table_combined[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
2262 id_table_combined[i].idVendor = vendor;
2263 id_table_combined[i].idProduct = product;
2265 retval = usb_serial_register(&ftdi_sio_device);
2267 goto failed_sio_register;
2268 retval = usb_register(&ftdi_driver);
2270 goto failed_usb_register;
2272 info(DRIVER_VERSION ":" DRIVER_DESC);
2274 failed_usb_register:
2275 usb_serial_deregister(&ftdi_sio_device);
2276 failed_sio_register:
2281 static void __exit ftdi_exit (void)
2284 dbg("%s", __FUNCTION__);
2286 usb_deregister (&ftdi_driver);
2287 usb_serial_deregister (&ftdi_sio_device);
2292 module_init(ftdi_init);
2293 module_exit(ftdi_exit);
2295 MODULE_AUTHOR( DRIVER_AUTHOR );
2296 MODULE_DESCRIPTION( DRIVER_DESC );
2297 MODULE_LICENSE("GPL");
2299 module_param(debug, bool, S_IRUGO | S_IWUSR);
2300 MODULE_PARM_DESC(debug, "Debug enabled or not");
2301 module_param(vendor, ushort, 0);
2302 MODULE_PARM_DESC(vendor, "User specified vendor ID (default="
2303 __MODULE_STRING(FTDI_VID)")");
2304 module_param(product, ushort, 0);
2305 MODULE_PARM_DESC(vendor, "User specified product ID");