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/config.h>
249 #include <linux/kernel.h>
250 #include <linux/errno.h>
251 #include <linux/init.h>
252 #include <linux/slab.h>
253 #include <linux/tty.h>
254 #include <linux/tty_driver.h>
255 #include <linux/tty_flip.h>
256 #include <linux/module.h>
257 #include <linux/spinlock.h>
258 #include <asm/uaccess.h>
259 #include <linux/usb.h>
260 #include <linux/serial.h>
261 #include "usb-serial.h"
262 #include "ftdi_sio.h"
265 * Version Information
267 #define DRIVER_VERSION "v1.4.3"
268 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Bill Ryder <bryder@sgi.com>, Kuba Ober <kuba@mareimbrium.org>"
269 #define DRIVER_DESC "USB FTDI Serial Converters Driver"
272 static __u16 vendor = FTDI_VID;
273 static __u16 product;
275 /* struct ftdi_sio_quirk is used by devices requiring special attention. */
276 struct ftdi_sio_quirk {
277 void (*setup)(struct usb_serial *); /* Special settings during startup. */
280 static void ftdi_USB_UIRT_setup (struct usb_serial *serial);
281 static void ftdi_HE_TIRA1_setup (struct usb_serial *serial);
283 static struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = {
284 .setup = ftdi_USB_UIRT_setup,
287 static struct ftdi_sio_quirk ftdi_HE_TIRA1_quirk = {
288 .setup = ftdi_HE_TIRA1_setup,
292 * The 8U232AM has the same API as the sio except for:
293 * - it can support MUCH higher baudrates; up to:
294 * o 921600 for RS232 and 2000000 for RS422/485 at 48MHz
296 * so .. 8U232AM's baudrate setting codes are different
297 * - it has a two byte status code.
298 * - it returns characters every 16ms (the FTDI does it every 40ms)
300 * the bcdDevice value is used to differentiate FT232BM and FT245BM from
301 * the earlier FT8U232AM and FT8U232BM. For now, include all known VID/PID
302 * combinations in both tables.
303 * FIXME: perhaps bcdDevice can also identify 12MHz FT8U232AM devices,
304 * but I don't know if those ever went into mass production. [Ian Abbott]
309 static struct usb_device_id id_table_combined [] = {
310 { USB_DEVICE(FTDI_VID, FTDI_IRTRANS_PID) },
311 { USB_DEVICE(FTDI_VID, FTDI_SIO_PID) },
312 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID) },
313 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_ALT_PID) },
314 { USB_DEVICE(FTDI_VID, FTDI_8U2232C_PID) },
315 { USB_DEVICE(FTDI_VID, FTDI_RELAIS_PID) },
316 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_IOBOARD_PID) },
317 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_MINI_IOBOARD_PID) },
318 { USB_DEVICE(FTDI_VID, FTDI_XF_632_PID) },
319 { USB_DEVICE(FTDI_VID, FTDI_XF_634_PID) },
320 { USB_DEVICE(FTDI_VID, FTDI_XF_547_PID) },
321 { USB_DEVICE(FTDI_VID, FTDI_XF_633_PID) },
322 { USB_DEVICE(FTDI_VID, FTDI_XF_631_PID) },
323 { USB_DEVICE(FTDI_VID, FTDI_XF_635_PID) },
324 { USB_DEVICE(FTDI_VID, FTDI_XF_640_PID) },
325 { USB_DEVICE(FTDI_VID, FTDI_XF_642_PID) },
326 { USB_DEVICE(FTDI_VID, FTDI_DSS20_PID) },
327 { USB_DEVICE(FTDI_NF_RIC_VID, FTDI_NF_RIC_PID) },
328 { USB_DEVICE(FTDI_VID, FTDI_VNHCPCUSB_D_PID) },
329 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_0_PID) },
330 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_1_PID) },
331 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_2_PID) },
332 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_3_PID) },
333 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_4_PID) },
334 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_5_PID) },
335 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) },
336 { USB_DEVICE(FTDI_VID, FTDI_PERLE_ULTRAPORT_PID) },
337 { USB_DEVICE(FTDI_VID, FTDI_PIEGROUP_PID) },
338 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2101_PID) },
339 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2102_PID) },
340 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2103_PID) },
341 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2104_PID) },
342 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_1_PID) },
343 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_2_PID) },
344 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_1_PID) },
345 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_2_PID) },
346 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_1_PID) },
347 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_2_PID) },
348 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_1_PID) },
349 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_2_PID) },
350 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_3_PID) },
351 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_4_PID) },
352 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_1_PID) },
353 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_2_PID) },
354 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_3_PID) },
355 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_4_PID) },
356 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_1_PID) },
357 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_2_PID) },
358 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_3_PID) },
359 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_4_PID) },
360 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_1_PID) },
361 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_2_PID) },
362 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_3_PID) },
363 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_4_PID) },
364 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_5_PID) },
365 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_6_PID) },
366 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_7_PID) },
367 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_8_PID) },
368 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_1_PID) },
369 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_2_PID) },
370 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_3_PID) },
371 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_4_PID) },
372 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_5_PID) },
373 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_6_PID) },
374 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_7_PID) },
375 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_8_PID) },
376 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_1_PID) },
377 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_2_PID) },
378 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_3_PID) },
379 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_4_PID) },
380 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_5_PID) },
381 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_6_PID) },
382 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_7_PID) },
383 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_8_PID) },
384 { USB_DEVICE(IDTECH_VID, IDTECH_IDT1221U_PID) },
385 { USB_DEVICE(OCT_VID, OCT_US101_PID) },
386 { USB_DEVICE(FTDI_VID, FTDI_HE_TIRA1_PID),
387 .driver_info = (kernel_ulong_t)&ftdi_HE_TIRA1_quirk },
388 { USB_DEVICE(FTDI_VID, FTDI_USB_UIRT_PID),
389 .driver_info = (kernel_ulong_t)&ftdi_USB_UIRT_quirk },
390 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_1) },
391 { USB_DEVICE(FTDI_VID, PROTEGO_R2X0) },
392 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_3) },
393 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_4) },
394 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E808_PID) },
395 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E809_PID) },
396 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80A_PID) },
397 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80B_PID) },
398 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80C_PID) },
399 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80D_PID) },
400 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80E_PID) },
401 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80F_PID) },
402 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E888_PID) },
403 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E889_PID) },
404 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88A_PID) },
405 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88B_PID) },
406 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88C_PID) },
407 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88D_PID) },
408 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88E_PID) },
409 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88F_PID) },
410 { USB_DEVICE(FTDI_VID, FTDI_ELV_UO100_PID) },
411 { USB_DEVICE(FTDI_VID, FTDI_ELV_UM100_PID) },
412 { USB_DEVICE(FTDI_VID, FTDI_ELV_UR100_PID) },
413 { USB_DEVICE(FTDI_VID, FTDI_ELV_ALC8500_PID) },
414 { USB_DEVICE(FTDI_VID, FTDI_PYRAMID_PID) },
415 { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1000PC_PID) },
417 * These will probably use user-space drivers. Uncomment them if
418 * you need them or use the user-specified vendor/product module
419 * parameters (see ftdi_sio.h for the numbers). Make a fuss if
420 * you think the driver should recognize any of them by default.
422 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_CLI7000_PID) }, */
423 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_PPS7330_PID) }, */
424 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_TFM100_PID) }, */
425 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UDF77_PID) }, */
426 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UIO88_PID) }, */
427 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UAD8_PID) }, */
428 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UDA7_PID) }, */
429 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_USI2_PID) }, */
430 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_T1100_PID) }, */
431 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_PCD200_PID) }, */
432 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_ULA200_PID) }, */
433 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_CSI8_PID) }, */
434 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1000DL_PID) }, */
435 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_PCK100_PID) }, */
436 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_RFP500_PID) }, */
437 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_FS20SIG_PID) }, */
438 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_WS300PC_PID) }, */
439 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1300PC_PID) }, */
440 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_WS500_PID) }, */
441 { USB_DEVICE(FTDI_VID, LINX_SDMUSBQSS_PID) },
442 { USB_DEVICE(FTDI_VID, LINX_MASTERDEVEL2_PID) },
443 { USB_DEVICE(FTDI_VID, LINX_FUTURE_0_PID) },
444 { USB_DEVICE(FTDI_VID, LINX_FUTURE_1_PID) },
445 { USB_DEVICE(FTDI_VID, LINX_FUTURE_2_PID) },
446 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU20_0_PID) },
447 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU40_1_PID) },
448 { USB_DEVICE(FTDI_VID, INSIDE_ACCESSO) },
449 { USB_DEVICE(INTREPID_VID, INTREPID_VALUECAN_PID) },
450 { USB_DEVICE(INTREPID_VID, INTREPID_NEOVI_PID) },
451 { USB_DEVICE(FALCOM_VID, FALCOM_TWIST_PID) },
452 { USB_DEVICE(FALCOM_VID, FALCOM_SAMBA_PID) },
453 { USB_DEVICE(FTDI_VID, FTDI_SUUNTO_SPORTS_PID) },
454 { USB_DEVICE(FTDI_VID, FTDI_RM_CANVIEW_PID) },
455 { USB_DEVICE(BANDB_VID, BANDB_USOTL4_PID) },
456 { USB_DEVICE(BANDB_VID, BANDB_USTL4_PID) },
457 { USB_DEVICE(BANDB_VID, BANDB_USO9ML2_PID) },
458 { USB_DEVICE(FTDI_VID, EVER_ECO_PRO_CDS) },
459 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_0_PID) },
460 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_1_PID) },
461 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_2_PID) },
462 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_0_PID) },
463 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_1_PID) },
464 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_2_PID) },
465 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_3_PID) },
466 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_4_PID) },
467 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_5_PID) },
468 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_6_PID) },
469 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_7_PID) },
470 { USB_DEVICE(MOBILITY_VID, MOBILITY_USB_SERIAL_PID) },
471 { USB_DEVICE(FTDI_VID, FTDI_ACTIVE_ROBOTS_PID) },
472 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y6_PID) },
473 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y8_PID) },
474 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_VCP_PID) },
475 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_D2XX_PID) },
476 { USB_DEVICE(EVOLUTION_VID, EVOLUTION_ER1_PID) },
477 { USB_DEVICE(FTDI_VID, FTDI_ARTEMIS_PID) },
478 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16_PID) },
479 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16C_PID) },
480 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HR_PID) },
481 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HRC_PID) },
482 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_B1_PID) },
483 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_KAAN_PID) },
484 { USB_DEVICE(POSIFLEX_VID, POSIFLEX_PP7000_PID) },
485 { USB_DEVICE(FTDI_VID, FTDI_TTUSB_PID) },
486 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_777_PID) },
487 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_8900F_PID) },
488 { USB_DEVICE(FTDI_VID, FTDI_PCDJ_DAC2_PID) },
489 { }, /* Optional parameter entry */
490 { } /* Terminating entry */
493 MODULE_DEVICE_TABLE (usb, id_table_combined);
495 static struct usb_driver ftdi_driver = {
497 .probe = usb_serial_probe,
498 .disconnect = usb_serial_disconnect,
499 .id_table = id_table_combined,
503 static const char *ftdi_chip_name[] = {
504 [SIO] = "SIO", /* the serial part of FT8U100AX */
505 [FT8U232AM] = "FT8U232AM",
506 [FT232BM] = "FT232BM",
507 [FT2232C] = "FT2232C",
511 /* Constants for read urb and write urb */
516 #define THROTTLED 0x01
517 #define ACTUALLY_THROTTLED 0x02
519 struct ftdi_private {
520 ftdi_chip_type_t chip_type;
521 /* type of the device, either SIO or FT8U232AM */
522 int baud_base; /* baud base clock for divisor setting */
523 int custom_divisor; /* custom_divisor kludge, this is for baud_base (different from what goes to the chip!) */
524 __u16 last_set_data_urb_value ;
525 /* the last data state set - needed for doing a break */
526 int write_offset; /* This is the offset in the usb data block to write the serial data -
527 * it is different between devices
529 int flags; /* some ASYNC_xxxx flags are supported */
530 unsigned long last_dtr_rts; /* saved modem control outputs */
531 wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
532 char prev_status, diff_status; /* Used for TIOCMIWAIT */
533 __u8 rx_flags; /* receive state flags (throttling) */
534 spinlock_t rx_lock; /* spinlock for receive state */
535 struct work_struct rx_work;
538 __u16 interface; /* FT2232C port interface (0 for FT232/245) */
540 int force_baud; /* if non-zero, force the baud rate to this value */
541 int force_rtscts; /* if non-zero, force RTS-CTS to always be enabled */
544 /* Used for TIOCMIWAIT */
545 #define FTDI_STATUS_B0_MASK (FTDI_RS0_CTS | FTDI_RS0_DSR | FTDI_RS0_RI | FTDI_RS0_RLSD)
546 #define FTDI_STATUS_B1_MASK (FTDI_RS_BI)
549 #define FTDI_IMPL_ASYNC_FLAGS = ( ASYNC_SPD_HI | ASYNC_SPD_VHI \
550 ASYNC_SPD_CUST | ASYNC_SPD_SHI | ASYNC_SPD_WARP )
552 /* function prototypes for a FTDI serial converter */
553 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id);
554 static int ftdi_sio_attach (struct usb_serial *serial);
555 static void ftdi_shutdown (struct usb_serial *serial);
556 static int ftdi_open (struct usb_serial_port *port, struct file *filp);
557 static void ftdi_close (struct usb_serial_port *port, struct file *filp);
558 static int ftdi_write (struct usb_serial_port *port, const unsigned char *buf, int count);
559 static int ftdi_write_room (struct usb_serial_port *port);
560 static int ftdi_chars_in_buffer (struct usb_serial_port *port);
561 static void ftdi_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
562 static void ftdi_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
563 static void ftdi_process_read (void *param);
564 static void ftdi_set_termios (struct usb_serial_port *port, struct termios * old);
565 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file);
566 static int ftdi_tiocmset (struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear);
567 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
568 static void ftdi_break_ctl (struct usb_serial_port *port, int break_state );
569 static void ftdi_throttle (struct usb_serial_port *port);
570 static void ftdi_unthrottle (struct usb_serial_port *port);
572 static unsigned short int ftdi_232am_baud_base_to_divisor (int baud, int base);
573 static unsigned short int ftdi_232am_baud_to_divisor (int baud);
574 static __u32 ftdi_232bm_baud_base_to_divisor (int baud, int base);
575 static __u32 ftdi_232bm_baud_to_divisor (int baud);
577 static struct usb_serial_driver ftdi_sio_device = {
579 .owner = THIS_MODULE,
582 .description = "FTDI USB Serial Device",
583 .id_table = id_table_combined,
584 .num_interrupt_in = 0,
588 .probe = ftdi_sio_probe,
591 .throttle = ftdi_throttle,
592 .unthrottle = ftdi_unthrottle,
594 .write_room = ftdi_write_room,
595 .chars_in_buffer = ftdi_chars_in_buffer,
596 .read_bulk_callback = ftdi_read_bulk_callback,
597 .write_bulk_callback = ftdi_write_bulk_callback,
598 .tiocmget = ftdi_tiocmget,
599 .tiocmset = ftdi_tiocmset,
601 .set_termios = ftdi_set_termios,
602 .break_ctl = ftdi_break_ctl,
603 .attach = ftdi_sio_attach,
604 .shutdown = ftdi_shutdown,
608 #define WDR_TIMEOUT 5000 /* default urb timeout */
609 #define WDR_SHORT_TIMEOUT 1000 /* shorter urb timeout */
611 /* High and low are for DTR, RTS etc etc */
616 * ***************************************************************************
618 * ***************************************************************************
621 static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base)
623 unsigned short int divisor;
624 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
625 if ((divisor3 & 0x7) == 7) divisor3 ++; // round x.7/8 up to x+1
626 divisor = divisor3 >> 3;
628 if (divisor3 == 1) divisor |= 0xc000; else // 0.125
629 if (divisor3 >= 4) divisor |= 0x4000; else // 0.5
630 if (divisor3 != 0) divisor |= 0x8000; // 0.25
631 if (divisor == 1) divisor = 0; /* special case for maximum baud rate */
635 static unsigned short int ftdi_232am_baud_to_divisor(int baud)
637 return(ftdi_232am_baud_base_to_divisor(baud, 48000000));
640 static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base)
642 static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
644 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
645 divisor = divisor3 >> 3;
646 divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
647 /* Deal with special cases for highest baud rates. */
648 if (divisor == 1) divisor = 0; else // 1.0
649 if (divisor == 0x4001) divisor = 1; // 1.5
653 static __u32 ftdi_232bm_baud_to_divisor(int baud)
655 return(ftdi_232bm_baud_base_to_divisor(baud, 48000000));
658 #define set_mctrl(port, set) update_mctrl((port), (set), 0)
659 #define clear_mctrl(port, clear) update_mctrl((port), 0, (clear))
661 static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned int clear)
663 struct ftdi_private *priv = usb_get_serial_port_data(port);
668 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
669 dbg("%s - DTR|RTS not being set|cleared", __FUNCTION__);
670 return 0; /* no change */
673 buf = kmalloc(1, GFP_NOIO);
678 clear &= ~set; /* 'set' takes precedence over 'clear' */
680 if (clear & TIOCM_DTR)
681 urb_value |= FTDI_SIO_SET_DTR_LOW;
682 if (clear & TIOCM_RTS)
683 urb_value |= FTDI_SIO_SET_RTS_LOW;
685 urb_value |= FTDI_SIO_SET_DTR_HIGH;
687 urb_value |= FTDI_SIO_SET_RTS_HIGH;
688 rv = usb_control_msg(port->serial->dev,
689 usb_sndctrlpipe(port->serial->dev, 0),
690 FTDI_SIO_SET_MODEM_CTRL_REQUEST,
691 FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
692 urb_value, priv->interface,
693 buf, 0, WDR_TIMEOUT);
697 err("%s Error from MODEM_CTRL urb: DTR %s, RTS %s",
699 (set & TIOCM_DTR) ? "HIGH" :
700 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
701 (set & TIOCM_RTS) ? "HIGH" :
702 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
704 dbg("%s - DTR %s, RTS %s", __FUNCTION__,
705 (set & TIOCM_DTR) ? "HIGH" :
706 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
707 (set & TIOCM_RTS) ? "HIGH" :
708 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
709 priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set;
715 static __u32 get_ftdi_divisor(struct usb_serial_port * port);
718 static int change_speed(struct usb_serial_port *port)
720 struct ftdi_private *priv = usb_get_serial_port_data(port);
724 __u32 urb_index_value;
727 buf = kmalloc(1, GFP_NOIO);
731 urb_index_value = get_ftdi_divisor(port);
732 urb_value = (__u16)urb_index_value;
733 urb_index = (__u16)(urb_index_value >> 16);
734 if (priv->interface) { /* FT2232C */
735 urb_index = (__u16)((urb_index << 8) | priv->interface);
738 rv = usb_control_msg(port->serial->dev,
739 usb_sndctrlpipe(port->serial->dev, 0),
740 FTDI_SIO_SET_BAUDRATE_REQUEST,
741 FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE,
742 urb_value, urb_index,
743 buf, 0, WDR_SHORT_TIMEOUT);
750 static __u32 get_ftdi_divisor(struct usb_serial_port * port)
751 { /* get_ftdi_divisor */
752 struct ftdi_private *priv = usb_get_serial_port_data(port);
758 * The logic involved in setting the baudrate can be cleanly split in 3 steps.
759 * Obtaining the actual baud rate is a little tricky since unix traditionally
760 * somehow ignored the possibility to set non-standard baud rates.
761 * 1. Standard baud rates are set in tty->termios->c_cflag
762 * 2. If these are not enough, you can set any speed using alt_speed as follows:
763 * - set tty->termios->c_cflag speed to B38400
764 * - set your real speed in tty->alt_speed; it gets ignored when
766 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
767 * flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP], this just
768 * sets alt_speed to (HI: 57600, VHI: 115200, SHI: 230400, WARP: 460800)
769 * ** Steps 1, 2 are done courtesy of tty_get_baud_rate
770 * 3. You can also set baud rate by setting custom divisor as follows
771 * - set tty->termios->c_cflag speed to B38400
772 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
773 * o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST
774 * o custom_divisor set to baud_base / your_new_baudrate
775 * ** Step 3 is done courtesy of code borrowed from serial.c - I should really
776 * spend some time and separate+move this common code to serial.c, it is
777 * replicated in nearly every serial driver you see.
780 /* 1. Get the baud rate from the tty settings, this observes alt_speed hack */
782 baud = tty_get_baud_rate(port->tty);
783 dbg("%s - tty_get_baud_rate reports speed %d", __FUNCTION__, baud);
785 /* 2. Observe async-compatible custom_divisor hack, update baudrate if needed */
788 ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
789 (priv->custom_divisor)) {
790 baud = priv->baud_base / priv->custom_divisor;
791 dbg("%s - custom divisor %d sets baud rate to %d", __FUNCTION__, priv->custom_divisor, baud);
794 /* 3. Convert baudrate to device-specific divisor */
796 if (!baud) baud = 9600;
797 switch(priv->chip_type) {
798 case SIO: /* SIO chip */
800 case 300: div_value = ftdi_sio_b300; break;
801 case 600: div_value = ftdi_sio_b600; break;
802 case 1200: div_value = ftdi_sio_b1200; break;
803 case 2400: div_value = ftdi_sio_b2400; break;
804 case 4800: div_value = ftdi_sio_b4800; break;
805 case 9600: div_value = ftdi_sio_b9600; break;
806 case 19200: div_value = ftdi_sio_b19200; break;
807 case 38400: div_value = ftdi_sio_b38400; break;
808 case 57600: div_value = ftdi_sio_b57600; break;
809 case 115200: div_value = ftdi_sio_b115200; break;
811 if (div_value == 0) {
812 dbg("%s - Baudrate (%d) requested is not supported", __FUNCTION__, baud);
813 div_value = ftdi_sio_b9600;
817 case FT8U232AM: /* 8U232AM chip */
818 if (baud <= 3000000) {
819 div_value = ftdi_232am_baud_to_divisor(baud);
821 dbg("%s - Baud rate too high!", __FUNCTION__);
822 div_value = ftdi_232am_baud_to_divisor(9600);
826 case FT232BM: /* FT232BM chip */
827 case FT2232C: /* FT2232C chip */
828 if (baud <= 3000000) {
829 div_value = ftdi_232bm_baud_to_divisor(baud);
831 dbg("%s - Baud rate too high!", __FUNCTION__);
832 div_value = ftdi_232bm_baud_to_divisor(9600);
836 } /* priv->chip_type */
839 dbg("%s - Baud rate set to %d (divisor 0x%lX) on chip %s",
840 __FUNCTION__, baud, (unsigned long)div_value,
841 ftdi_chip_name[priv->chip_type]);
848 static int get_serial_info(struct usb_serial_port * port, struct serial_struct __user * retinfo)
850 struct ftdi_private *priv = usb_get_serial_port_data(port);
851 struct serial_struct tmp;
855 memset(&tmp, 0, sizeof(tmp));
856 tmp.flags = priv->flags;
857 tmp.baud_base = priv->baud_base;
858 tmp.custom_divisor = priv->custom_divisor;
859 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
862 } /* get_serial_info */
865 static int set_serial_info(struct usb_serial_port * port, struct serial_struct __user * newinfo)
866 { /* set_serial_info */
867 struct ftdi_private *priv = usb_get_serial_port_data(port);
868 struct serial_struct new_serial;
869 struct ftdi_private old_priv;
871 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
875 /* Do error checking and permission checking */
877 if (!capable(CAP_SYS_ADMIN)) {
878 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
879 (priv->flags & ~ASYNC_USR_MASK)))
881 priv->flags = ((priv->flags & ~ASYNC_USR_MASK) |
882 (new_serial.flags & ASYNC_USR_MASK));
883 priv->custom_divisor = new_serial.custom_divisor;
887 if ((new_serial.baud_base != priv->baud_base) &&
888 (new_serial.baud_base < 9600))
891 /* Make the changes - these are privileged changes! */
893 priv->flags = ((priv->flags & ~ASYNC_FLAGS) |
894 (new_serial.flags & ASYNC_FLAGS));
895 priv->custom_divisor = new_serial.custom_divisor;
897 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
900 if ((old_priv.flags & ASYNC_SPD_MASK) !=
901 (priv->flags & ASYNC_SPD_MASK)) {
902 if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
903 port->tty->alt_speed = 57600;
904 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
905 port->tty->alt_speed = 115200;
906 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
907 port->tty->alt_speed = 230400;
908 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
909 port->tty->alt_speed = 460800;
911 port->tty->alt_speed = 0;
913 if (((old_priv.flags & ASYNC_SPD_MASK) !=
914 (priv->flags & ASYNC_SPD_MASK)) ||
915 (((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
916 (old_priv.custom_divisor != priv->custom_divisor))) {
922 } /* set_serial_info */
925 /* Determine type of FTDI chip based on USB config and descriptor. */
926 static void ftdi_determine_type(struct usb_serial_port *port)
928 struct ftdi_private *priv = usb_get_serial_port_data(port);
929 struct usb_serial *serial = port->serial;
930 struct usb_device *udev = serial->dev;
934 /* Assume it is not the original SIO device for now. */
935 priv->baud_base = 48000000 / 2;
936 priv->write_offset = 0;
938 version = le16_to_cpu(udev->descriptor.bcdDevice);
939 interfaces = udev->actconfig->desc.bNumInterfaces;
940 dbg("%s: bcdDevice = 0x%x, bNumInterfaces = %u", __FUNCTION__,
941 version, interfaces);
942 if (interfaces > 1) {
945 /* Multiple interfaces. Assume FT2232C. */
946 priv->chip_type = FT2232C;
947 /* Determine interface code. */
948 inter = serial->interface->altsetting->desc.bInterfaceNumber;
950 priv->interface = PIT_SIOA;
952 priv->interface = PIT_SIOB;
954 /* BM-type devices have a bug where bcdDevice gets set
955 * to 0x200 when iSerialNumber is 0. */
956 if (version < 0x500) {
957 dbg("%s: something fishy - bcdDevice too low for multi-interface device",
960 } else if (version < 0x200) {
961 /* Old device. Assume its the original SIO. */
962 priv->chip_type = SIO;
963 priv->baud_base = 12000000 / 16;
964 priv->write_offset = 1;
965 } else if (version < 0x400) {
966 /* Assume its an FT8U232AM (or FT8U245AM) */
967 /* (It might be a BM because of the iSerialNumber bug,
968 * but it will still work as an AM device.) */
969 priv->chip_type = FT8U232AM;
971 /* Assume its an FT232BM (or FT245BM) */
972 priv->chip_type = FT232BM;
974 info("Detected %s", ftdi_chip_name[priv->chip_type]);
979 * ***************************************************************************
981 * ***************************************************************************
984 static ssize_t show_latency_timer(struct device *dev, struct device_attribute *attr, char *buf)
986 struct usb_serial_port *port = to_usb_serial_port(dev);
987 struct ftdi_private *priv = usb_get_serial_port_data(port);
988 struct usb_device *udev;
989 unsigned short latency = 0;
992 udev = to_usb_device(dev);
994 dbg("%s",__FUNCTION__);
996 rv = usb_control_msg(udev,
997 usb_rcvctrlpipe(udev, 0),
998 FTDI_SIO_GET_LATENCY_TIMER_REQUEST,
999 FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE,
1001 (char*) &latency, 1, WDR_TIMEOUT);
1004 dev_err(dev, "Unable to read latency timer: %i", rv);
1007 return sprintf(buf, "%i\n", latency);
1010 /* Write a new value of the latency timer, in units of milliseconds. */
1011 static ssize_t store_latency_timer(struct device *dev, struct device_attribute *attr, const char *valbuf,
1014 struct usb_serial_port *port = to_usb_serial_port(dev);
1015 struct ftdi_private *priv = usb_get_serial_port_data(port);
1016 struct usb_device *udev;
1018 int v = simple_strtoul(valbuf, NULL, 10);
1021 udev = to_usb_device(dev);
1023 dbg("%s: setting latency timer = %i", __FUNCTION__, v);
1025 rv = usb_control_msg(udev,
1026 usb_sndctrlpipe(udev, 0),
1027 FTDI_SIO_SET_LATENCY_TIMER_REQUEST,
1028 FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE,
1030 buf, 0, WDR_TIMEOUT);
1033 dev_err(dev, "Unable to write latency timer: %i", rv);
1040 /* Write an event character directly to the FTDI register. The ASCII
1041 value is in the low 8 bits, with the enable bit in the 9th bit. */
1042 static ssize_t store_event_char(struct device *dev, struct device_attribute *attr, const char *valbuf,
1045 struct usb_serial_port *port = to_usb_serial_port(dev);
1046 struct ftdi_private *priv = usb_get_serial_port_data(port);
1047 struct usb_device *udev;
1049 int v = simple_strtoul(valbuf, NULL, 10);
1052 udev = to_usb_device(dev);
1054 dbg("%s: setting event char = %i", __FUNCTION__, v);
1056 rv = usb_control_msg(udev,
1057 usb_sndctrlpipe(udev, 0),
1058 FTDI_SIO_SET_EVENT_CHAR_REQUEST,
1059 FTDI_SIO_SET_EVENT_CHAR_REQUEST_TYPE,
1061 buf, 0, WDR_TIMEOUT);
1064 dbg("Unable to write event character: %i", rv);
1071 static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer, store_latency_timer);
1072 static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char);
1074 static void create_sysfs_attrs(struct usb_serial *serial)
1076 struct ftdi_private *priv;
1077 struct usb_device *udev;
1079 dbg("%s",__FUNCTION__);
1081 priv = usb_get_serial_port_data(serial->port[0]);
1084 /* XXX I've no idea if the original SIO supports the event_char
1085 * sysfs parameter, so I'm playing it safe. */
1086 if (priv->chip_type != SIO) {
1087 dbg("sysfs attributes for %s", ftdi_chip_name[priv->chip_type]);
1088 device_create_file(&udev->dev, &dev_attr_event_char);
1089 if (priv->chip_type == FT232BM || priv->chip_type == FT2232C) {
1090 device_create_file(&udev->dev, &dev_attr_latency_timer);
1095 static void remove_sysfs_attrs(struct usb_serial *serial)
1097 struct ftdi_private *priv;
1098 struct usb_device *udev;
1100 dbg("%s",__FUNCTION__);
1102 priv = usb_get_serial_port_data(serial->port[0]);
1105 /* XXX see create_sysfs_attrs */
1106 if (priv->chip_type != SIO) {
1107 device_remove_file(&udev->dev, &dev_attr_event_char);
1108 if (priv->chip_type == FT232BM || priv->chip_type == FT2232C) {
1109 device_remove_file(&udev->dev, &dev_attr_latency_timer);
1116 * ***************************************************************************
1117 * FTDI driver specific functions
1118 * ***************************************************************************
1121 /* Probe function to check for special devices */
1122 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id)
1124 usb_set_serial_data(serial, (void *)id->driver_info);
1129 /* attach subroutine */
1130 static int ftdi_sio_attach (struct usb_serial *serial)
1132 struct usb_serial_port *port = serial->port[0];
1133 struct ftdi_private *priv;
1134 struct ftdi_sio_quirk *quirk;
1136 dbg("%s",__FUNCTION__);
1138 priv = kmalloc(sizeof(struct ftdi_private), GFP_KERNEL);
1140 err("%s- kmalloc(%Zd) failed.", __FUNCTION__, sizeof(struct ftdi_private));
1143 memset(priv, 0, sizeof(*priv));
1145 spin_lock_init(&priv->rx_lock);
1146 init_waitqueue_head(&priv->delta_msr_wait);
1147 /* This will push the characters through immediately rather
1148 than queue a task to deliver them */
1149 priv->flags = ASYNC_LOW_LATENCY;
1151 /* Increase the size of read buffers */
1152 kfree(port->bulk_in_buffer);
1153 port->bulk_in_buffer = kmalloc (BUFSZ, GFP_KERNEL);
1154 if (!port->bulk_in_buffer) {
1158 if (port->read_urb) {
1159 port->read_urb->transfer_buffer = port->bulk_in_buffer;
1160 port->read_urb->transfer_buffer_length = BUFSZ;
1163 INIT_WORK(&priv->rx_work, ftdi_process_read, port);
1165 /* Free port's existing write urb and transfer buffer. */
1166 if (port->write_urb) {
1167 usb_free_urb (port->write_urb);
1168 port->write_urb = NULL;
1170 kfree(port->bulk_out_buffer);
1171 port->bulk_out_buffer = NULL;
1173 usb_set_serial_port_data(serial->port[0], priv);
1175 ftdi_determine_type (serial->port[0]);
1176 create_sysfs_attrs(serial);
1178 /* Check for device requiring special set up. */
1179 quirk = (struct ftdi_sio_quirk *)usb_get_serial_data(serial);
1180 if (quirk && quirk->setup) {
1181 quirk->setup(serial);
1185 } /* ftdi_sio_attach */
1188 /* Setup for the USB-UIRT device, which requires hardwired
1189 * baudrate (38400 gets mapped to 312500) */
1190 /* Called from usbserial:serial_probe */
1191 static void ftdi_USB_UIRT_setup (struct usb_serial *serial)
1193 struct ftdi_private *priv;
1195 dbg("%s",__FUNCTION__);
1197 priv = usb_get_serial_port_data(serial->port[0]);
1198 priv->flags |= ASYNC_SPD_CUST;
1199 priv->custom_divisor = 77;
1200 priv->force_baud = B38400;
1201 } /* ftdi_USB_UIRT_setup */
1203 /* Setup for the HE-TIRA1 device, which requires hardwired
1204 * baudrate (38400 gets mapped to 100000) and RTS-CTS enabled. */
1205 static void ftdi_HE_TIRA1_setup (struct usb_serial *serial)
1207 struct ftdi_private *priv;
1209 dbg("%s",__FUNCTION__);
1211 priv = usb_get_serial_port_data(serial->port[0]);
1212 priv->flags |= ASYNC_SPD_CUST;
1213 priv->custom_divisor = 240;
1214 priv->force_baud = B38400;
1215 priv->force_rtscts = 1;
1216 } /* ftdi_HE_TIRA1_setup */
1219 /* ftdi_shutdown is called from usbserial:usb_serial_disconnect
1220 * it is called when the usb device is disconnected
1222 * usbserial:usb_serial_disconnect
1223 * calls __serial_close for each open of the port
1224 * shutdown is called then (ie ftdi_shutdown)
1228 static void ftdi_shutdown (struct usb_serial *serial)
1229 { /* ftdi_shutdown */
1231 struct usb_serial_port *port = serial->port[0];
1232 struct ftdi_private *priv = usb_get_serial_port_data(port);
1234 dbg("%s", __FUNCTION__);
1236 remove_sysfs_attrs(serial);
1238 /* all open ports are closed at this point
1239 * (by usbserial.c:__serial_close, which calls ftdi_close)
1243 usb_set_serial_port_data(port, NULL);
1246 } /* ftdi_shutdown */
1249 static int ftdi_open (struct usb_serial_port *port, struct file *filp)
1251 struct termios tmp_termios;
1252 struct usb_device *dev = port->serial->dev;
1253 struct ftdi_private *priv = usb_get_serial_port_data(port);
1254 unsigned long flags;
1257 char buf[1]; /* Needed for the usb_control_msg I think */
1259 dbg("%s", __FUNCTION__);
1262 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1264 /* No error checking for this (will get errors later anyway) */
1265 /* See ftdi_sio.h for description of what is reset */
1266 usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1267 FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE,
1269 priv->interface, buf, 0, WDR_TIMEOUT);
1271 /* Termios defaults are set by usb_serial_init. We don't change
1272 port->tty->termios - this would loose speed settings, etc.
1273 This is same behaviour as serial.c/rs_open() - Kuba */
1275 /* ftdi_set_termios will send usb control messages */
1276 ftdi_set_termios(port, &tmp_termios);
1278 /* FIXME: Flow control might be enabled, so it should be checked -
1279 we have no control of defaults! */
1280 /* Turn on RTS and DTR since we are not flow controlling by default */
1281 set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1284 spin_lock_irqsave(&priv->rx_lock, flags);
1285 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
1286 spin_unlock_irqrestore(&priv->rx_lock, flags);
1288 /* Start reading from the device */
1289 priv->rx_processed = 0;
1290 usb_fill_bulk_urb(port->read_urb, dev,
1291 usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress),
1292 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
1293 ftdi_read_bulk_callback, port);
1294 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
1296 err("%s - failed submitting read urb, error %d", __FUNCTION__, result);
1305 * usbserial:__serial_close only calls ftdi_close if the point is open
1307 * This only gets called when it is the last close
1312 static void ftdi_close (struct usb_serial_port *port, struct file *filp)
1314 unsigned int c_cflag = port->tty->termios->c_cflag;
1315 struct ftdi_private *priv = usb_get_serial_port_data(port);
1318 dbg("%s", __FUNCTION__);
1320 if (c_cflag & HUPCL){
1321 /* Disable flow control */
1322 if (usb_control_msg(port->serial->dev,
1323 usb_sndctrlpipe(port->serial->dev, 0),
1324 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1325 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1326 0, priv->interface, buf, 0,
1328 err("error from flowcontrol urb");
1331 /* drop RTS and DTR */
1332 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1333 } /* Note change no line if hupcl is off */
1335 /* cancel any scheduled reading */
1336 cancel_delayed_work(&priv->rx_work);
1337 flush_scheduled_work();
1339 /* shutdown our bulk read */
1341 usb_kill_urb(port->read_urb);
1346 /* The SIO requires the first byte to have:
1349 * B2..7 length of message excluding byte 0
1351 * The new devices do not require this byte
1353 static int ftdi_write (struct usb_serial_port *port,
1354 const unsigned char *buf, int count)
1356 struct ftdi_private *priv = usb_get_serial_port_data(port);
1358 unsigned char *buffer;
1359 int data_offset ; /* will be 1 for the SIO and 0 otherwise */
1363 dbg("%s port %d, %d bytes", __FUNCTION__, port->number, count);
1366 dbg("write request of 0 bytes");
1370 data_offset = priv->write_offset;
1371 dbg("data_offset set to %d",data_offset);
1373 /* Determine total transfer size */
1374 transfer_size = count;
1375 if (data_offset > 0) {
1376 /* Original sio needs control bytes too... */
1377 transfer_size += (data_offset *
1378 ((count + (PKTSZ - 1 - data_offset)) /
1379 (PKTSZ - data_offset)));
1382 buffer = kmalloc (transfer_size, GFP_ATOMIC);
1384 err("%s ran out of kernel memory for urb ...", __FUNCTION__);
1388 urb = usb_alloc_urb(0, GFP_ATOMIC);
1390 err("%s - no more free urbs", __FUNCTION__);
1396 if (data_offset > 0) {
1397 /* Original sio requires control byte at start of each packet. */
1398 int user_pktsz = PKTSZ - data_offset;
1400 unsigned char *first_byte = buffer;
1401 const unsigned char *current_position = buf;
1404 if (user_pktsz > todo) {
1407 /* Write the control byte at the front of the packet*/
1408 *first_byte = 1 | ((user_pktsz) << 2);
1409 /* Copy data for packet */
1410 memcpy (first_byte + data_offset,
1411 current_position, user_pktsz);
1412 first_byte += user_pktsz + data_offset;
1413 current_position += user_pktsz;
1417 /* No control byte required. */
1418 /* Copy in the data to send */
1419 memcpy (buffer, buf, count);
1422 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, buffer);
1424 /* fill the buffer and send it */
1425 usb_fill_bulk_urb(urb, port->serial->dev,
1426 usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress),
1427 buffer, transfer_size,
1428 ftdi_write_bulk_callback, port);
1430 status = usb_submit_urb(urb, GFP_ATOMIC);
1432 err("%s - failed submitting write urb, error %d", __FUNCTION__, status);
1437 /* we are done with this urb, so let the host driver
1438 * really free it when it is finished with it */
1441 dbg("%s write returning: %d", __FUNCTION__, count);
1446 /* This function may get called when the device is closed */
1448 static void ftdi_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
1450 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1452 /* free up the transfer buffer, as usb_free_urb() does not do this */
1453 kfree (urb->transfer_buffer);
1455 dbg("%s - port %d", __FUNCTION__, port->number);
1458 dbg("nonzero write bulk status received: %d", urb->status);
1462 schedule_work(&port->work);
1463 } /* ftdi_write_bulk_callback */
1466 static int ftdi_write_room( struct usb_serial_port *port )
1468 dbg("%s - port %d", __FUNCTION__, port->number);
1471 * We really can take anything the user throws at us
1472 * but let's pick a nice big number to tell the tty
1473 * layer that we have lots of free space
1476 } /* ftdi_write_room */
1479 static int ftdi_chars_in_buffer (struct usb_serial_port *port)
1480 { /* ftdi_chars_in_buffer */
1481 dbg("%s - port %d", __FUNCTION__, port->number);
1484 * We can't really account for how much data we
1485 * have sent out, but hasn't made it through to the
1486 * device, so just tell the tty layer that everything
1490 } /* ftdi_chars_in_buffer */
1494 static void ftdi_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
1495 { /* ftdi_read_bulk_callback */
1496 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1497 struct tty_struct *tty;
1498 struct ftdi_private *priv;
1500 if (urb->number_of_packets > 0) {
1501 err("%s transfer_buffer_length %d actual_length %d number of packets %d",__FUNCTION__,
1502 urb->transfer_buffer_length, urb->actual_length, urb->number_of_packets );
1503 err("%s transfer_flags %x ", __FUNCTION__,urb->transfer_flags );
1506 dbg("%s - port %d", __FUNCTION__, port->number);
1508 if (port->open_count <= 0)
1513 dbg("%s - bad tty pointer - exiting",__FUNCTION__);
1517 priv = usb_get_serial_port_data(port);
1519 dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
1523 if (urb != port->read_urb) {
1524 err("%s - Not my urb!", __FUNCTION__);
1528 /* This will happen at close every time so it is a dbg not an err */
1529 dbg("(this is ok on close) nonzero read bulk status received: %d", urb->status);
1533 ftdi_process_read(port);
1535 } /* ftdi_read_bulk_callback */
1538 static void ftdi_process_read (void *param)
1539 { /* ftdi_process_read */
1540 struct usb_serial_port *port = (struct usb_serial_port*)param;
1542 struct tty_struct *tty;
1543 struct ftdi_private *priv;
1545 unsigned char *data;
1551 unsigned long flags;
1553 dbg("%s - port %d", __FUNCTION__, port->number);
1555 if (port->open_count <= 0)
1560 dbg("%s - bad tty pointer - exiting",__FUNCTION__);
1564 priv = usb_get_serial_port_data(port);
1566 dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
1570 urb = port->read_urb;
1572 dbg("%s - bad read_urb pointer - exiting", __FUNCTION__);
1576 data = urb->transfer_buffer;
1578 if (priv->rx_processed) {
1579 dbg("%s - already processed: %d bytes, %d remain", __FUNCTION__,
1581 urb->actual_length - priv->rx_processed);
1583 /* The first two bytes of every read packet are status */
1584 if (urb->actual_length > 2) {
1585 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
1587 dbg("Status only: %03oo %03oo",data[0],data[1]);
1592 /* TO DO -- check for hung up line and handle appropriately: */
1594 /* See acm.c - you do a tty_hangup - eg tty_hangup(tty) */
1595 /* if CD is dropped and the line is not CLOCAL then we should hangup */
1598 for (packet_offset = priv->rx_processed; packet_offset < urb->actual_length; packet_offset += PKTSZ) {
1601 /* Compare new line status to the old one, signal if different */
1602 /* N.B. packet may be processed more than once, but differences
1603 * are only processed once. */
1605 char new_status = data[packet_offset+0] & FTDI_STATUS_B0_MASK;
1606 if (new_status != priv->prev_status) {
1607 priv->diff_status |= new_status ^ priv->prev_status;
1608 wake_up_interruptible(&priv->delta_msr_wait);
1609 priv->prev_status = new_status;
1613 length = min(PKTSZ, urb->actual_length-packet_offset)-2;
1615 err("%s - bad packet length: %d", __FUNCTION__, length+2);
1619 if (priv->rx_flags & THROTTLED) {
1620 dbg("%s - throttled", __FUNCTION__);
1623 if (tty_buffer_request_room(tty, length) < length) {
1624 /* break out & wait for throttling/unthrottling to happen */
1625 dbg("%s - receive room low", __FUNCTION__);
1629 /* Handle errors and break */
1630 error_flag = TTY_NORMAL;
1631 /* Although the device uses a bitmask and hence can have multiple */
1632 /* errors on a packet - the order here sets the priority the */
1633 /* error is returned to the tty layer */
1635 if ( data[packet_offset+1] & FTDI_RS_OE ) {
1636 error_flag = TTY_OVERRUN;
1637 dbg("OVERRRUN error");
1639 if ( data[packet_offset+1] & FTDI_RS_BI ) {
1640 error_flag = TTY_BREAK;
1641 dbg("BREAK received");
1643 if ( data[packet_offset+1] & FTDI_RS_PE ) {
1644 error_flag = TTY_PARITY;
1645 dbg("PARITY error");
1647 if ( data[packet_offset+1] & FTDI_RS_FE ) {
1648 error_flag = TTY_FRAME;
1649 dbg("FRAMING error");
1652 for (i = 2; i < length+2; i++) {
1653 /* Note that the error flag is duplicated for
1654 every character received since we don't know
1655 which character it applied to */
1656 tty_insert_flip_char(tty, data[packet_offset+i], error_flag);
1661 #ifdef NOT_CORRECT_BUT_KEEPING_IT_FOR_NOW
1662 /* if a parity error is detected you get status packets forever
1663 until a character is sent without a parity error.
1664 This doesn't work well since the application receives a never
1665 ending stream of bad data - even though new data hasn't been sent.
1666 Therefore I (bill) have taken this out.
1667 However - this might make sense for framing errors and so on
1668 so I am leaving the code in for now.
1671 if (error_flag != TTY_NORMAL){
1672 dbg("error_flag is not normal");
1673 /* In this case it is just status - if that is an error send a bad character */
1674 if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
1675 tty_flip_buffer_push(tty);
1677 tty_insert_flip_char(tty, 0xff, error_flag);
1682 } /* "for(packet_offset=0..." */
1686 tty_flip_buffer_push(tty);
1689 if (packet_offset < urb->actual_length) {
1690 /* not completely processed - record progress */
1691 priv->rx_processed = packet_offset;
1692 dbg("%s - incomplete, %d bytes processed, %d remain",
1693 __FUNCTION__, packet_offset,
1694 urb->actual_length - packet_offset);
1695 /* check if we were throttled while processing */
1696 spin_lock_irqsave(&priv->rx_lock, flags);
1697 if (priv->rx_flags & THROTTLED) {
1698 priv->rx_flags |= ACTUALLY_THROTTLED;
1699 spin_unlock_irqrestore(&priv->rx_lock, flags);
1700 dbg("%s - deferring remainder until unthrottled",
1704 spin_unlock_irqrestore(&priv->rx_lock, flags);
1705 /* if the port is closed stop trying to read */
1706 if (port->open_count > 0){
1707 /* delay processing of remainder */
1708 schedule_delayed_work(&priv->rx_work, 1);
1710 dbg("%s - port is closed", __FUNCTION__);
1715 /* urb is completely processed */
1716 priv->rx_processed = 0;
1718 /* if the port is closed stop trying to read */
1719 if (port->open_count > 0){
1720 /* Continue trying to always read */
1721 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
1722 usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress),
1723 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
1724 ftdi_read_bulk_callback, port);
1726 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1728 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1732 } /* ftdi_process_read */
1735 static void ftdi_break_ctl( struct usb_serial_port *port, int break_state )
1737 struct ftdi_private *priv = usb_get_serial_port_data(port);
1738 __u16 urb_value = 0;
1741 /* break_state = -1 to turn on break, and 0 to turn off break */
1742 /* see drivers/char/tty_io.c to see it used */
1743 /* last_set_data_urb_value NEVER has the break bit set in it */
1746 urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK;
1748 urb_value = priv->last_set_data_urb_value;
1752 if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0),
1753 FTDI_SIO_SET_DATA_REQUEST,
1754 FTDI_SIO_SET_DATA_REQUEST_TYPE,
1755 urb_value , priv->interface,
1756 buf, 0, WDR_TIMEOUT) < 0) {
1757 err("%s FAILED to enable/disable break state (state was %d)", __FUNCTION__,break_state);
1760 dbg("%s break state is %d - urb is %d", __FUNCTION__,break_state, urb_value);
1765 /* old_termios contains the original termios settings and tty->termios contains
1766 * the new setting to be used
1767 * WARNING: set_termios calls this with old_termios in kernel space
1770 static void ftdi_set_termios (struct usb_serial_port *port, struct termios *old_termios)
1771 { /* ftdi_termios */
1772 struct usb_device *dev = port->serial->dev;
1773 unsigned int cflag = port->tty->termios->c_cflag;
1774 struct ftdi_private *priv = usb_get_serial_port_data(port);
1775 __u16 urb_value; /* will hold the new flags */
1776 char buf[1]; /* Perhaps I should dynamically alloc this? */
1778 // Added for xon/xoff support
1779 unsigned int iflag = port->tty->termios->c_iflag;
1780 unsigned char vstop;
1781 unsigned char vstart;
1783 dbg("%s", __FUNCTION__);
1785 /* Force baud rate if this device requires it, unless it is set to B0. */
1786 if (priv->force_baud && ((port->tty->termios->c_cflag & CBAUD) != B0)) {
1787 dbg("%s: forcing baud rate for this device", __FUNCTION__);
1788 port->tty->termios->c_cflag &= ~CBAUD;
1789 port->tty->termios->c_cflag |= priv->force_baud;
1792 /* Force RTS-CTS if this device requires it. */
1793 if (priv->force_rtscts) {
1794 dbg("%s: forcing rtscts for this device", __FUNCTION__);
1795 port->tty->termios->c_cflag |= CRTSCTS;
1798 cflag = port->tty->termios->c_cflag;
1800 /* FIXME -For this cut I don't care if the line is really changing or
1801 not - so just do the change regardless - should be able to
1802 compare old_termios and tty->termios */
1803 /* NOTE These routines can get interrupted by
1804 ftdi_sio_read_bulk_callback - need to examine what this
1805 means - don't see any problems yet */
1807 /* Set number of data bits, parity, stop bits */
1810 urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 :
1811 FTDI_SIO_SET_DATA_STOP_BITS_1);
1812 urb_value |= (cflag & PARENB ?
1813 (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD :
1814 FTDI_SIO_SET_DATA_PARITY_EVEN) :
1815 FTDI_SIO_SET_DATA_PARITY_NONE);
1816 if (cflag & CSIZE) {
1817 switch (cflag & CSIZE) {
1818 case CS5: urb_value |= 5; dbg("Setting CS5"); break;
1819 case CS6: urb_value |= 6; dbg("Setting CS6"); break;
1820 case CS7: urb_value |= 7; dbg("Setting CS7"); break;
1821 case CS8: urb_value |= 8; dbg("Setting CS8"); break;
1823 err("CSIZE was set but not CS5-CS8");
1827 /* This is needed by the break command since it uses the same command - but is
1828 * or'ed with this value */
1829 priv->last_set_data_urb_value = urb_value;
1831 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1832 FTDI_SIO_SET_DATA_REQUEST,
1833 FTDI_SIO_SET_DATA_REQUEST_TYPE,
1834 urb_value , priv->interface,
1835 buf, 0, WDR_SHORT_TIMEOUT) < 0) {
1836 err("%s FAILED to set databits/stopbits/parity", __FUNCTION__);
1839 /* Now do the baudrate */
1840 if ((cflag & CBAUD) == B0 ) {
1841 /* Disable flow control */
1842 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1843 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1844 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1846 buf, 0, WDR_TIMEOUT) < 0) {
1847 err("%s error from disable flowcontrol urb", __FUNCTION__);
1849 /* Drop RTS and DTR */
1850 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1852 /* set the baudrate determined before */
1853 if (change_speed(port)) {
1854 err("%s urb failed to set baudrate", __FUNCTION__);
1856 /* Ensure RTS and DTR are raised when baudrate changed from 0 */
1857 if ((old_termios->c_cflag & CBAUD) == B0) {
1858 set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1862 /* Set flow control */
1863 /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */
1864 if (cflag & CRTSCTS) {
1865 dbg("%s Setting to CRTSCTS flow control", __FUNCTION__);
1866 if (usb_control_msg(dev,
1867 usb_sndctrlpipe(dev, 0),
1868 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1869 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1870 0 , (FTDI_SIO_RTS_CTS_HS | priv->interface),
1871 buf, 0, WDR_TIMEOUT) < 0) {
1872 err("urb failed to set to rts/cts flow control");
1879 * Check the IXOFF status in the iflag component of the termios structure
1880 * if IXOFF is not set, the pre-xon/xoff code is executed.
1882 if (iflag & IXOFF) {
1883 dbg("%s request to enable xonxoff iflag=%04x",__FUNCTION__,iflag);
1884 // Try to enable the XON/XOFF on the ftdi_sio
1885 // Set the vstart and vstop -- could have been done up above where
1886 // a lot of other dereferencing is done but that would be very
1887 // inefficient as vstart and vstop are not always needed
1888 vstart=port->tty->termios->c_cc[VSTART];
1889 vstop=port->tty->termios->c_cc[VSTOP];
1890 urb_value=(vstop << 8) | (vstart);
1892 if (usb_control_msg(dev,
1893 usb_sndctrlpipe(dev, 0),
1894 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1895 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1896 urb_value , (FTDI_SIO_XON_XOFF_HS
1898 buf, 0, WDR_TIMEOUT) < 0) {
1899 err("urb failed to set to xon/xoff flow control");
1902 /* else clause to only run if cfag ! CRTSCTS and iflag ! XOFF */
1903 /* CHECKME Assuming XON/XOFF handled by tty stack - not by device */
1904 dbg("%s Turning off hardware flow control", __FUNCTION__);
1905 if (usb_control_msg(dev,
1906 usb_sndctrlpipe(dev, 0),
1907 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1908 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1910 buf, 0, WDR_TIMEOUT) < 0) {
1911 err("urb failed to clear flow control");
1917 } /* ftdi_termios */
1920 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file)
1922 struct ftdi_private *priv = usb_get_serial_port_data(port);
1923 unsigned char buf[2];
1926 dbg("%s TIOCMGET", __FUNCTION__);
1927 switch (priv->chip_type) {
1929 /* Request the status from the device */
1930 if ((ret = usb_control_msg(port->serial->dev,
1931 usb_rcvctrlpipe(port->serial->dev, 0),
1932 FTDI_SIO_GET_MODEM_STATUS_REQUEST,
1933 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
1935 buf, 1, WDR_TIMEOUT)) < 0 ) {
1936 err("%s Could not get modem status of device - err: %d", __FUNCTION__,
1944 /* the 8U232AM returns a two byte value (the sio is a 1 byte value) - in the same
1945 format as the data returned from the in point */
1946 if ((ret = usb_control_msg(port->serial->dev,
1947 usb_rcvctrlpipe(port->serial->dev, 0),
1948 FTDI_SIO_GET_MODEM_STATUS_REQUEST,
1949 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
1951 buf, 2, WDR_TIMEOUT)) < 0 ) {
1952 err("%s Could not get modem status of device - err: %d", __FUNCTION__,
1962 return (buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) |
1963 (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) |
1964 (buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) |
1965 (buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0) |
1969 static int ftdi_tiocmset(struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear)
1971 dbg("%s TIOCMSET", __FUNCTION__);
1972 return update_mctrl(port, set, clear);
1976 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
1978 struct ftdi_private *priv = usb_get_serial_port_data(port);
1980 dbg("%s cmd 0x%04x", __FUNCTION__, cmd);
1982 /* Based on code from acm.c and others */
1985 case TIOCGSERIAL: /* gets serial port data */
1986 return get_serial_info(port, (struct serial_struct __user *) arg);
1988 case TIOCSSERIAL: /* sets serial port data */
1989 return set_serial_info(port, (struct serial_struct __user *) arg);
1992 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1993 * - mask passed in arg for lines of interest
1994 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1995 * Caller should use TIOCGICOUNT to see which one it was.
1997 * This code is borrowed from linux/drivers/char/serial.c
2000 while (priv != NULL) {
2001 interruptible_sleep_on(&priv->delta_msr_wait);
2002 /* see if a signal did it */
2003 if (signal_pending(current))
2004 return -ERESTARTSYS;
2006 char diff = priv->diff_status;
2009 return -EIO; /* no change => error */
2012 /* Consume all events */
2013 priv->diff_status = 0;
2015 /* Return 0 if caller wanted to know about these bits */
2016 if ( ((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) ||
2017 ((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) ||
2018 ((arg & TIOCM_CD) && (diff & FTDI_RS0_RLSD)) ||
2019 ((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS)) ) {
2023 * Otherwise caller can't care less about what happened,
2024 * and so we continue to wait for more events.
2036 /* This is not necessarily an error - turns out the higher layers will do
2037 * some ioctls itself (see comment above)
2039 dbg("%s arg not supported - it was 0x%04x - check /usr/include/asm/ioctls.h", __FUNCTION__, cmd);
2041 return(-ENOIOCTLCMD);
2045 static void ftdi_throttle (struct usb_serial_port *port)
2047 struct ftdi_private *priv = usb_get_serial_port_data(port);
2048 unsigned long flags;
2050 dbg("%s - port %d", __FUNCTION__, port->number);
2052 spin_lock_irqsave(&priv->rx_lock, flags);
2053 priv->rx_flags |= THROTTLED;
2054 spin_unlock_irqrestore(&priv->rx_lock, flags);
2058 static void ftdi_unthrottle (struct usb_serial_port *port)
2060 struct ftdi_private *priv = usb_get_serial_port_data(port);
2061 int actually_throttled;
2062 unsigned long flags;
2064 dbg("%s - port %d", __FUNCTION__, port->number);
2066 spin_lock_irqsave(&priv->rx_lock, flags);
2067 actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED;
2068 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
2069 spin_unlock_irqrestore(&priv->rx_lock, flags);
2071 if (actually_throttled)
2072 schedule_work(&priv->rx_work);
2075 static int __init ftdi_init (void)
2079 dbg("%s", __FUNCTION__);
2080 if (vendor > 0 && product > 0) {
2081 /* Add user specified VID/PID to reserved element of table. */
2083 for (i = 0; id_table_combined[i].idVendor; i++)
2085 id_table_combined[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
2086 id_table_combined[i].idVendor = vendor;
2087 id_table_combined[i].idProduct = product;
2089 retval = usb_serial_register(&ftdi_sio_device);
2091 goto failed_sio_register;
2092 retval = usb_register(&ftdi_driver);
2094 goto failed_usb_register;
2096 info(DRIVER_VERSION ":" DRIVER_DESC);
2098 failed_usb_register:
2099 usb_serial_deregister(&ftdi_sio_device);
2100 failed_sio_register:
2105 static void __exit ftdi_exit (void)
2108 dbg("%s", __FUNCTION__);
2110 usb_deregister (&ftdi_driver);
2111 usb_serial_deregister (&ftdi_sio_device);
2116 module_init(ftdi_init);
2117 module_exit(ftdi_exit);
2119 MODULE_AUTHOR( DRIVER_AUTHOR );
2120 MODULE_DESCRIPTION( DRIVER_DESC );
2121 MODULE_LICENSE("GPL");
2123 module_param(debug, bool, S_IRUGO | S_IWUSR);
2124 MODULE_PARM_DESC(debug, "Debug enabled or not");
2125 module_param(vendor, ushort, 0);
2126 MODULE_PARM_DESC(vendor, "User specified vendor ID (default="
2127 __MODULE_STRING(FTDI_VID)")");
2128 module_param(product, ushort, 0);
2129 MODULE_PARM_DESC(vendor, "User specified product ID");