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_ACTZWAVE_PID) },
311 { USB_DEVICE(FTDI_VID, FTDI_IRTRANS_PID) },
312 { USB_DEVICE(FTDI_VID, FTDI_IPLUS_PID) },
313 { USB_DEVICE(FTDI_VID, FTDI_SIO_PID) },
314 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID) },
315 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_ALT_PID) },
316 { USB_DEVICE(FTDI_VID, FTDI_8U2232C_PID) },
317 { USB_DEVICE(FTDI_VID, FTDI_RELAIS_PID) },
318 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_IOBOARD_PID) },
319 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_MINI_IOBOARD_PID) },
320 { USB_DEVICE(FTDI_VID, FTDI_XF_632_PID) },
321 { USB_DEVICE(FTDI_VID, FTDI_XF_634_PID) },
322 { USB_DEVICE(FTDI_VID, FTDI_XF_547_PID) },
323 { USB_DEVICE(FTDI_VID, FTDI_XF_633_PID) },
324 { USB_DEVICE(FTDI_VID, FTDI_XF_631_PID) },
325 { USB_DEVICE(FTDI_VID, FTDI_XF_635_PID) },
326 { USB_DEVICE(FTDI_VID, FTDI_XF_640_PID) },
327 { USB_DEVICE(FTDI_VID, FTDI_XF_642_PID) },
328 { USB_DEVICE(FTDI_VID, FTDI_DSS20_PID) },
329 { USB_DEVICE(FTDI_NF_RIC_VID, FTDI_NF_RIC_PID) },
330 { USB_DEVICE(FTDI_VID, FTDI_VNHCPCUSB_D_PID) },
331 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_0_PID) },
332 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_1_PID) },
333 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_2_PID) },
334 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_3_PID) },
335 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_4_PID) },
336 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_5_PID) },
337 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) },
338 { USB_DEVICE(FTDI_VID, FTDI_PERLE_ULTRAPORT_PID) },
339 { USB_DEVICE(FTDI_VID, FTDI_PIEGROUP_PID) },
340 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2101_PID) },
341 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2102_PID) },
342 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2103_PID) },
343 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2104_PID) },
344 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_1_PID) },
345 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_2_PID) },
346 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_1_PID) },
347 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_2_PID) },
348 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_1_PID) },
349 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_2_PID) },
350 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_1_PID) },
351 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_2_PID) },
352 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_3_PID) },
353 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_4_PID) },
354 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_1_PID) },
355 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_2_PID) },
356 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_3_PID) },
357 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_4_PID) },
358 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_1_PID) },
359 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_2_PID) },
360 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_3_PID) },
361 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_4_PID) },
362 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_1_PID) },
363 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_2_PID) },
364 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_3_PID) },
365 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_4_PID) },
366 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_5_PID) },
367 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_6_PID) },
368 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_7_PID) },
369 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_8_PID) },
370 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_1_PID) },
371 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_2_PID) },
372 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_3_PID) },
373 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_4_PID) },
374 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_5_PID) },
375 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_6_PID) },
376 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_7_PID) },
377 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_8_PID) },
378 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_1_PID) },
379 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_2_PID) },
380 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_3_PID) },
381 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_4_PID) },
382 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_5_PID) },
383 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_6_PID) },
384 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_7_PID) },
385 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_8_PID) },
386 { USB_DEVICE(IDTECH_VID, IDTECH_IDT1221U_PID) },
387 { USB_DEVICE(OCT_VID, OCT_US101_PID) },
388 { USB_DEVICE(FTDI_VID, FTDI_HE_TIRA1_PID),
389 .driver_info = (kernel_ulong_t)&ftdi_HE_TIRA1_quirk },
390 { USB_DEVICE(FTDI_VID, FTDI_USB_UIRT_PID),
391 .driver_info = (kernel_ulong_t)&ftdi_USB_UIRT_quirk },
392 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_1) },
393 { USB_DEVICE(FTDI_VID, PROTEGO_R2X0) },
394 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_3) },
395 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_4) },
396 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E808_PID) },
397 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E809_PID) },
398 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80A_PID) },
399 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80B_PID) },
400 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80C_PID) },
401 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80D_PID) },
402 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80E_PID) },
403 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80F_PID) },
404 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E888_PID) },
405 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E889_PID) },
406 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88A_PID) },
407 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88B_PID) },
408 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88C_PID) },
409 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88D_PID) },
410 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88E_PID) },
411 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88F_PID) },
412 { USB_DEVICE(FTDI_VID, FTDI_ELV_UO100_PID) },
413 { USB_DEVICE(FTDI_VID, FTDI_ELV_UM100_PID) },
414 { USB_DEVICE(FTDI_VID, FTDI_ELV_UR100_PID) },
415 { USB_DEVICE(FTDI_VID, FTDI_ELV_ALC8500_PID) },
416 { USB_DEVICE(FTDI_VID, FTDI_PYRAMID_PID) },
417 { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1000PC_PID) },
419 * These will probably use user-space drivers. Uncomment them if
420 * you need them or use the user-specified vendor/product module
421 * parameters (see ftdi_sio.h for the numbers). Make a fuss if
422 * you think the driver should recognize any of them by default.
424 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_CLI7000_PID) }, */
425 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_PPS7330_PID) }, */
426 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_TFM100_PID) }, */
427 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UDF77_PID) }, */
428 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UIO88_PID) }, */
429 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UAD8_PID) }, */
430 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UDA7_PID) }, */
431 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_USI2_PID) }, */
432 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_T1100_PID) }, */
433 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_PCD200_PID) }, */
434 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_ULA200_PID) }, */
435 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_CSI8_PID) }, */
436 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1000DL_PID) }, */
437 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_PCK100_PID) }, */
438 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_RFP500_PID) }, */
439 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_FS20SIG_PID) }, */
440 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_WS300PC_PID) }, */
441 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1300PC_PID) }, */
442 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_WS500_PID) }, */
443 { USB_DEVICE(FTDI_VID, LINX_SDMUSBQSS_PID) },
444 { USB_DEVICE(FTDI_VID, LINX_MASTERDEVEL2_PID) },
445 { USB_DEVICE(FTDI_VID, LINX_FUTURE_0_PID) },
446 { USB_DEVICE(FTDI_VID, LINX_FUTURE_1_PID) },
447 { USB_DEVICE(FTDI_VID, LINX_FUTURE_2_PID) },
448 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU20_0_PID) },
449 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU40_1_PID) },
450 { USB_DEVICE(FTDI_VID, INSIDE_ACCESSO) },
451 { USB_DEVICE(INTREPID_VID, INTREPID_VALUECAN_PID) },
452 { USB_DEVICE(INTREPID_VID, INTREPID_NEOVI_PID) },
453 { USB_DEVICE(FALCOM_VID, FALCOM_TWIST_PID) },
454 { USB_DEVICE(FALCOM_VID, FALCOM_SAMBA_PID) },
455 { USB_DEVICE(FTDI_VID, FTDI_SUUNTO_SPORTS_PID) },
456 { USB_DEVICE(FTDI_VID, FTDI_RM_CANVIEW_PID) },
457 { USB_DEVICE(BANDB_VID, BANDB_USOTL4_PID) },
458 { USB_DEVICE(BANDB_VID, BANDB_USTL4_PID) },
459 { USB_DEVICE(BANDB_VID, BANDB_USO9ML2_PID) },
460 { USB_DEVICE(FTDI_VID, EVER_ECO_PRO_CDS) },
461 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_0_PID) },
462 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_1_PID) },
463 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_2_PID) },
464 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_0_PID) },
465 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_1_PID) },
466 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_2_PID) },
467 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_3_PID) },
468 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_4_PID) },
469 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_5_PID) },
470 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_6_PID) },
471 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_7_PID) },
472 { USB_DEVICE(MOBILITY_VID, MOBILITY_USB_SERIAL_PID) },
473 { USB_DEVICE(FTDI_VID, FTDI_ACTIVE_ROBOTS_PID) },
474 { USB_DEVICE(FTDI_VID, FTDI_MHAM_KW_PID) },
475 { USB_DEVICE(FTDI_VID, FTDI_MHAM_YS_PID) },
476 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y6_PID) },
477 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y8_PID) },
478 { USB_DEVICE(FTDI_VID, FTDI_MHAM_IC_PID) },
479 { USB_DEVICE(FTDI_VID, FTDI_MHAM_DB9_PID) },
480 { USB_DEVICE(FTDI_VID, FTDI_MHAM_RS232_PID) },
481 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y9_PID) },
482 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_VCP_PID) },
483 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_D2XX_PID) },
484 { USB_DEVICE(EVOLUTION_VID, EVOLUTION_ER1_PID) },
485 { USB_DEVICE(FTDI_VID, FTDI_ARTEMIS_PID) },
486 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16_PID) },
487 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16C_PID) },
488 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HR_PID) },
489 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HRC_PID) },
490 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_B1_PID) },
491 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_KAAN_PID) },
492 { USB_DEVICE(POSIFLEX_VID, POSIFLEX_PP7000_PID) },
493 { USB_DEVICE(FTDI_VID, FTDI_TTUSB_PID) },
494 { USB_DEVICE(FTDI_VID, FTDI_ECLO_COM_1WIRE_PID) },
495 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_777_PID) },
496 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_8900F_PID) },
497 { USB_DEVICE(FTDI_VID, FTDI_PCDJ_DAC2_PID) },
498 { USB_DEVICE(FTDI_VID, FTDI_RRCIRKITS_LOCOBUFFER_PID) },
499 { USB_DEVICE(FTDI_VID, FTDI_ASK_RDR400_PID) },
500 { USB_DEVICE(ICOM_ID1_VID, ICOM_ID1_PID) },
501 { USB_DEVICE(PAPOUCH_VID, PAPOUCH_TMU_PID) },
502 { USB_DEVICE(FTDI_VID, FTDI_ACG_HFDUAL_PID) },
503 { }, /* Optional parameter entry */
504 { } /* Terminating entry */
507 MODULE_DEVICE_TABLE (usb, id_table_combined);
509 static struct usb_driver ftdi_driver = {
511 .probe = usb_serial_probe,
512 .disconnect = usb_serial_disconnect,
513 .id_table = id_table_combined,
517 static const char *ftdi_chip_name[] = {
518 [SIO] = "SIO", /* the serial part of FT8U100AX */
519 [FT8U232AM] = "FT8U232AM",
520 [FT232BM] = "FT232BM",
521 [FT2232C] = "FT2232C",
525 /* Constants for read urb and write urb */
530 #define THROTTLED 0x01
531 #define ACTUALLY_THROTTLED 0x02
533 struct ftdi_private {
534 ftdi_chip_type_t chip_type;
535 /* type of the device, either SIO or FT8U232AM */
536 int baud_base; /* baud base clock for divisor setting */
537 int custom_divisor; /* custom_divisor kludge, this is for baud_base (different from what goes to the chip!) */
538 __u16 last_set_data_urb_value ;
539 /* the last data state set - needed for doing a break */
540 int write_offset; /* This is the offset in the usb data block to write the serial data -
541 * it is different between devices
543 int flags; /* some ASYNC_xxxx flags are supported */
544 unsigned long last_dtr_rts; /* saved modem control outputs */
545 wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
546 char prev_status, diff_status; /* Used for TIOCMIWAIT */
547 __u8 rx_flags; /* receive state flags (throttling) */
548 spinlock_t rx_lock; /* spinlock for receive state */
549 struct work_struct rx_work;
552 __u16 interface; /* FT2232C port interface (0 for FT232/245) */
554 int force_baud; /* if non-zero, force the baud rate to this value */
555 int force_rtscts; /* if non-zero, force RTS-CTS to always be enabled */
557 spinlock_t tx_lock; /* spinlock for transmit state */
558 unsigned long tx_outstanding_bytes;
559 unsigned long tx_outstanding_urbs;
562 /* Used for TIOCMIWAIT */
563 #define FTDI_STATUS_B0_MASK (FTDI_RS0_CTS | FTDI_RS0_DSR | FTDI_RS0_RI | FTDI_RS0_RLSD)
564 #define FTDI_STATUS_B1_MASK (FTDI_RS_BI)
567 #define FTDI_IMPL_ASYNC_FLAGS = ( ASYNC_SPD_HI | ASYNC_SPD_VHI \
568 ASYNC_SPD_CUST | ASYNC_SPD_SHI | ASYNC_SPD_WARP )
570 /* function prototypes for a FTDI serial converter */
571 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id);
572 static int ftdi_sio_attach (struct usb_serial *serial);
573 static void ftdi_shutdown (struct usb_serial *serial);
574 static int ftdi_open (struct usb_serial_port *port, struct file *filp);
575 static void ftdi_close (struct usb_serial_port *port, struct file *filp);
576 static int ftdi_write (struct usb_serial_port *port, const unsigned char *buf, int count);
577 static int ftdi_write_room (struct usb_serial_port *port);
578 static int ftdi_chars_in_buffer (struct usb_serial_port *port);
579 static void ftdi_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
580 static void ftdi_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
581 static void ftdi_process_read (void *param);
582 static void ftdi_set_termios (struct usb_serial_port *port, struct termios * old);
583 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file);
584 static int ftdi_tiocmset (struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear);
585 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
586 static void ftdi_break_ctl (struct usb_serial_port *port, int break_state );
587 static void ftdi_throttle (struct usb_serial_port *port);
588 static void ftdi_unthrottle (struct usb_serial_port *port);
590 static unsigned short int ftdi_232am_baud_base_to_divisor (int baud, int base);
591 static unsigned short int ftdi_232am_baud_to_divisor (int baud);
592 static __u32 ftdi_232bm_baud_base_to_divisor (int baud, int base);
593 static __u32 ftdi_232bm_baud_to_divisor (int baud);
595 static struct usb_serial_driver ftdi_sio_device = {
597 .owner = THIS_MODULE,
600 .description = "FTDI USB Serial Device",
601 .id_table = id_table_combined,
602 .num_interrupt_in = 0,
606 .probe = ftdi_sio_probe,
609 .throttle = ftdi_throttle,
610 .unthrottle = ftdi_unthrottle,
612 .write_room = ftdi_write_room,
613 .chars_in_buffer = ftdi_chars_in_buffer,
614 .read_bulk_callback = ftdi_read_bulk_callback,
615 .write_bulk_callback = ftdi_write_bulk_callback,
616 .tiocmget = ftdi_tiocmget,
617 .tiocmset = ftdi_tiocmset,
619 .set_termios = ftdi_set_termios,
620 .break_ctl = ftdi_break_ctl,
621 .attach = ftdi_sio_attach,
622 .shutdown = ftdi_shutdown,
626 #define WDR_TIMEOUT 5000 /* default urb timeout */
627 #define WDR_SHORT_TIMEOUT 1000 /* shorter urb timeout */
629 /* High and low are for DTR, RTS etc etc */
633 /* number of outstanding urbs to prevent userspace DoS from happening */
634 #define URB_UPPER_LIMIT 42
637 * ***************************************************************************
639 * ***************************************************************************
642 static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base)
644 unsigned short int divisor;
645 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
646 if ((divisor3 & 0x7) == 7) divisor3 ++; // round x.7/8 up to x+1
647 divisor = divisor3 >> 3;
649 if (divisor3 == 1) divisor |= 0xc000; else // 0.125
650 if (divisor3 >= 4) divisor |= 0x4000; else // 0.5
651 if (divisor3 != 0) divisor |= 0x8000; // 0.25
652 if (divisor == 1) divisor = 0; /* special case for maximum baud rate */
656 static unsigned short int ftdi_232am_baud_to_divisor(int baud)
658 return(ftdi_232am_baud_base_to_divisor(baud, 48000000));
661 static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base)
663 static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
665 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left
666 divisor = divisor3 >> 3;
667 divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
668 /* Deal with special cases for highest baud rates. */
669 if (divisor == 1) divisor = 0; else // 1.0
670 if (divisor == 0x4001) divisor = 1; // 1.5
674 static __u32 ftdi_232bm_baud_to_divisor(int baud)
676 return(ftdi_232bm_baud_base_to_divisor(baud, 48000000));
679 #define set_mctrl(port, set) update_mctrl((port), (set), 0)
680 #define clear_mctrl(port, clear) update_mctrl((port), 0, (clear))
682 static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned int clear)
684 struct ftdi_private *priv = usb_get_serial_port_data(port);
689 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
690 dbg("%s - DTR|RTS not being set|cleared", __FUNCTION__);
691 return 0; /* no change */
694 buf = kmalloc(1, GFP_NOIO);
699 clear &= ~set; /* 'set' takes precedence over 'clear' */
701 if (clear & TIOCM_DTR)
702 urb_value |= FTDI_SIO_SET_DTR_LOW;
703 if (clear & TIOCM_RTS)
704 urb_value |= FTDI_SIO_SET_RTS_LOW;
706 urb_value |= FTDI_SIO_SET_DTR_HIGH;
708 urb_value |= FTDI_SIO_SET_RTS_HIGH;
709 rv = usb_control_msg(port->serial->dev,
710 usb_sndctrlpipe(port->serial->dev, 0),
711 FTDI_SIO_SET_MODEM_CTRL_REQUEST,
712 FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
713 urb_value, priv->interface,
714 buf, 0, WDR_TIMEOUT);
718 err("%s Error from MODEM_CTRL urb: DTR %s, RTS %s",
720 (set & TIOCM_DTR) ? "HIGH" :
721 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
722 (set & TIOCM_RTS) ? "HIGH" :
723 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
725 dbg("%s - DTR %s, RTS %s", __FUNCTION__,
726 (set & TIOCM_DTR) ? "HIGH" :
727 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
728 (set & TIOCM_RTS) ? "HIGH" :
729 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
730 priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set;
736 static __u32 get_ftdi_divisor(struct usb_serial_port * port);
739 static int change_speed(struct usb_serial_port *port)
741 struct ftdi_private *priv = usb_get_serial_port_data(port);
745 __u32 urb_index_value;
748 buf = kmalloc(1, GFP_NOIO);
752 urb_index_value = get_ftdi_divisor(port);
753 urb_value = (__u16)urb_index_value;
754 urb_index = (__u16)(urb_index_value >> 16);
755 if (priv->interface) { /* FT2232C */
756 urb_index = (__u16)((urb_index << 8) | priv->interface);
759 rv = usb_control_msg(port->serial->dev,
760 usb_sndctrlpipe(port->serial->dev, 0),
761 FTDI_SIO_SET_BAUDRATE_REQUEST,
762 FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE,
763 urb_value, urb_index,
764 buf, 0, WDR_SHORT_TIMEOUT);
771 static __u32 get_ftdi_divisor(struct usb_serial_port * port)
772 { /* get_ftdi_divisor */
773 struct ftdi_private *priv = usb_get_serial_port_data(port);
779 * The logic involved in setting the baudrate can be cleanly split in 3 steps.
780 * Obtaining the actual baud rate is a little tricky since unix traditionally
781 * somehow ignored the possibility to set non-standard baud rates.
782 * 1. Standard baud rates are set in tty->termios->c_cflag
783 * 2. If these are not enough, you can set any speed using alt_speed as follows:
784 * - set tty->termios->c_cflag speed to B38400
785 * - set your real speed in tty->alt_speed; it gets ignored when
787 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
788 * flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP], this just
789 * sets alt_speed to (HI: 57600, VHI: 115200, SHI: 230400, WARP: 460800)
790 * ** Steps 1, 2 are done courtesy of tty_get_baud_rate
791 * 3. You can also set baud rate by setting custom divisor as follows
792 * - set tty->termios->c_cflag speed to B38400
793 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows:
794 * o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST
795 * o custom_divisor set to baud_base / your_new_baudrate
796 * ** Step 3 is done courtesy of code borrowed from serial.c - I should really
797 * spend some time and separate+move this common code to serial.c, it is
798 * replicated in nearly every serial driver you see.
801 /* 1. Get the baud rate from the tty settings, this observes alt_speed hack */
803 baud = tty_get_baud_rate(port->tty);
804 dbg("%s - tty_get_baud_rate reports speed %d", __FUNCTION__, baud);
806 /* 2. Observe async-compatible custom_divisor hack, update baudrate if needed */
809 ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
810 (priv->custom_divisor)) {
811 baud = priv->baud_base / priv->custom_divisor;
812 dbg("%s - custom divisor %d sets baud rate to %d", __FUNCTION__, priv->custom_divisor, baud);
815 /* 3. Convert baudrate to device-specific divisor */
817 if (!baud) baud = 9600;
818 switch(priv->chip_type) {
819 case SIO: /* SIO chip */
821 case 300: div_value = ftdi_sio_b300; break;
822 case 600: div_value = ftdi_sio_b600; break;
823 case 1200: div_value = ftdi_sio_b1200; break;
824 case 2400: div_value = ftdi_sio_b2400; break;
825 case 4800: div_value = ftdi_sio_b4800; break;
826 case 9600: div_value = ftdi_sio_b9600; break;
827 case 19200: div_value = ftdi_sio_b19200; break;
828 case 38400: div_value = ftdi_sio_b38400; break;
829 case 57600: div_value = ftdi_sio_b57600; break;
830 case 115200: div_value = ftdi_sio_b115200; break;
832 if (div_value == 0) {
833 dbg("%s - Baudrate (%d) requested is not supported", __FUNCTION__, baud);
834 div_value = ftdi_sio_b9600;
838 case FT8U232AM: /* 8U232AM chip */
839 if (baud <= 3000000) {
840 div_value = ftdi_232am_baud_to_divisor(baud);
842 dbg("%s - Baud rate too high!", __FUNCTION__);
843 div_value = ftdi_232am_baud_to_divisor(9600);
847 case FT232BM: /* FT232BM chip */
848 case FT2232C: /* FT2232C chip */
849 if (baud <= 3000000) {
850 div_value = ftdi_232bm_baud_to_divisor(baud);
852 dbg("%s - Baud rate too high!", __FUNCTION__);
853 div_value = ftdi_232bm_baud_to_divisor(9600);
857 } /* priv->chip_type */
860 dbg("%s - Baud rate set to %d (divisor 0x%lX) on chip %s",
861 __FUNCTION__, baud, (unsigned long)div_value,
862 ftdi_chip_name[priv->chip_type]);
869 static int get_serial_info(struct usb_serial_port * port, struct serial_struct __user * retinfo)
871 struct ftdi_private *priv = usb_get_serial_port_data(port);
872 struct serial_struct tmp;
876 memset(&tmp, 0, sizeof(tmp));
877 tmp.flags = priv->flags;
878 tmp.baud_base = priv->baud_base;
879 tmp.custom_divisor = priv->custom_divisor;
880 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
883 } /* get_serial_info */
886 static int set_serial_info(struct usb_serial_port * port, struct serial_struct __user * newinfo)
887 { /* set_serial_info */
888 struct ftdi_private *priv = usb_get_serial_port_data(port);
889 struct serial_struct new_serial;
890 struct ftdi_private old_priv;
892 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
896 /* Do error checking and permission checking */
898 if (!capable(CAP_SYS_ADMIN)) {
899 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
900 (priv->flags & ~ASYNC_USR_MASK)))
902 priv->flags = ((priv->flags & ~ASYNC_USR_MASK) |
903 (new_serial.flags & ASYNC_USR_MASK));
904 priv->custom_divisor = new_serial.custom_divisor;
908 if ((new_serial.baud_base != priv->baud_base) &&
909 (new_serial.baud_base < 9600))
912 /* Make the changes - these are privileged changes! */
914 priv->flags = ((priv->flags & ~ASYNC_FLAGS) |
915 (new_serial.flags & ASYNC_FLAGS));
916 priv->custom_divisor = new_serial.custom_divisor;
918 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
921 if ((old_priv.flags & ASYNC_SPD_MASK) !=
922 (priv->flags & ASYNC_SPD_MASK)) {
923 if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
924 port->tty->alt_speed = 57600;
925 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
926 port->tty->alt_speed = 115200;
927 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
928 port->tty->alt_speed = 230400;
929 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
930 port->tty->alt_speed = 460800;
932 port->tty->alt_speed = 0;
934 if (((old_priv.flags & ASYNC_SPD_MASK) !=
935 (priv->flags & ASYNC_SPD_MASK)) ||
936 (((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
937 (old_priv.custom_divisor != priv->custom_divisor))) {
943 } /* set_serial_info */
946 /* Determine type of FTDI chip based on USB config and descriptor. */
947 static void ftdi_determine_type(struct usb_serial_port *port)
949 struct ftdi_private *priv = usb_get_serial_port_data(port);
950 struct usb_serial *serial = port->serial;
951 struct usb_device *udev = serial->dev;
955 /* Assume it is not the original SIO device for now. */
956 priv->baud_base = 48000000 / 2;
957 priv->write_offset = 0;
959 version = le16_to_cpu(udev->descriptor.bcdDevice);
960 interfaces = udev->actconfig->desc.bNumInterfaces;
961 dbg("%s: bcdDevice = 0x%x, bNumInterfaces = %u", __FUNCTION__,
962 version, interfaces);
963 if (interfaces > 1) {
966 /* Multiple interfaces. Assume FT2232C. */
967 priv->chip_type = FT2232C;
968 /* Determine interface code. */
969 inter = serial->interface->altsetting->desc.bInterfaceNumber;
971 priv->interface = PIT_SIOA;
973 priv->interface = PIT_SIOB;
975 /* BM-type devices have a bug where bcdDevice gets set
976 * to 0x200 when iSerialNumber is 0. */
977 if (version < 0x500) {
978 dbg("%s: something fishy - bcdDevice too low for multi-interface device",
981 } else if (version < 0x200) {
982 /* Old device. Assume its the original SIO. */
983 priv->chip_type = SIO;
984 priv->baud_base = 12000000 / 16;
985 priv->write_offset = 1;
986 } else if (version < 0x400) {
987 /* Assume its an FT8U232AM (or FT8U245AM) */
988 /* (It might be a BM because of the iSerialNumber bug,
989 * but it will still work as an AM device.) */
990 priv->chip_type = FT8U232AM;
992 /* Assume its an FT232BM (or FT245BM) */
993 priv->chip_type = FT232BM;
995 info("Detected %s", ftdi_chip_name[priv->chip_type]);
1000 * ***************************************************************************
1002 * ***************************************************************************
1005 static ssize_t show_latency_timer(struct device *dev, struct device_attribute *attr, char *buf)
1007 struct usb_serial_port *port = to_usb_serial_port(dev);
1008 struct ftdi_private *priv = usb_get_serial_port_data(port);
1009 struct usb_device *udev;
1010 unsigned short latency = 0;
1013 udev = to_usb_device(dev);
1015 dbg("%s",__FUNCTION__);
1017 rv = usb_control_msg(udev,
1018 usb_rcvctrlpipe(udev, 0),
1019 FTDI_SIO_GET_LATENCY_TIMER_REQUEST,
1020 FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE,
1022 (char*) &latency, 1, WDR_TIMEOUT);
1025 dev_err(dev, "Unable to read latency timer: %i", rv);
1028 return sprintf(buf, "%i\n", latency);
1031 /* Write a new value of the latency timer, in units of milliseconds. */
1032 static ssize_t store_latency_timer(struct device *dev, struct device_attribute *attr, const char *valbuf,
1035 struct usb_serial_port *port = to_usb_serial_port(dev);
1036 struct ftdi_private *priv = usb_get_serial_port_data(port);
1037 struct usb_device *udev;
1039 int v = simple_strtoul(valbuf, NULL, 10);
1042 udev = to_usb_device(dev);
1044 dbg("%s: setting latency timer = %i", __FUNCTION__, v);
1046 rv = usb_control_msg(udev,
1047 usb_sndctrlpipe(udev, 0),
1048 FTDI_SIO_SET_LATENCY_TIMER_REQUEST,
1049 FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE,
1051 buf, 0, WDR_TIMEOUT);
1054 dev_err(dev, "Unable to write latency timer: %i", rv);
1061 /* Write an event character directly to the FTDI register. The ASCII
1062 value is in the low 8 bits, with the enable bit in the 9th bit. */
1063 static ssize_t store_event_char(struct device *dev, struct device_attribute *attr, const char *valbuf,
1066 struct usb_serial_port *port = to_usb_serial_port(dev);
1067 struct ftdi_private *priv = usb_get_serial_port_data(port);
1068 struct usb_device *udev;
1070 int v = simple_strtoul(valbuf, NULL, 10);
1073 udev = to_usb_device(dev);
1075 dbg("%s: setting event char = %i", __FUNCTION__, v);
1077 rv = usb_control_msg(udev,
1078 usb_sndctrlpipe(udev, 0),
1079 FTDI_SIO_SET_EVENT_CHAR_REQUEST,
1080 FTDI_SIO_SET_EVENT_CHAR_REQUEST_TYPE,
1082 buf, 0, WDR_TIMEOUT);
1085 dbg("Unable to write event character: %i", rv);
1092 static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer, store_latency_timer);
1093 static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char);
1095 static void create_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 I've no idea if the original SIO supports the event_char
1106 * sysfs parameter, so I'm playing it safe. */
1107 if (priv->chip_type != SIO) {
1108 dbg("sysfs attributes for %s", ftdi_chip_name[priv->chip_type]);
1109 device_create_file(&udev->dev, &dev_attr_event_char);
1110 if (priv->chip_type == FT232BM || priv->chip_type == FT2232C) {
1111 device_create_file(&udev->dev, &dev_attr_latency_timer);
1116 static void remove_sysfs_attrs(struct usb_serial *serial)
1118 struct ftdi_private *priv;
1119 struct usb_device *udev;
1121 dbg("%s",__FUNCTION__);
1123 priv = usb_get_serial_port_data(serial->port[0]);
1126 /* XXX see create_sysfs_attrs */
1127 if (priv->chip_type != SIO) {
1128 device_remove_file(&udev->dev, &dev_attr_event_char);
1129 if (priv->chip_type == FT232BM || priv->chip_type == FT2232C) {
1130 device_remove_file(&udev->dev, &dev_attr_latency_timer);
1137 * ***************************************************************************
1138 * FTDI driver specific functions
1139 * ***************************************************************************
1142 /* Probe function to check for special devices */
1143 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id)
1145 usb_set_serial_data(serial, (void *)id->driver_info);
1150 /* attach subroutine */
1151 static int ftdi_sio_attach (struct usb_serial *serial)
1153 struct usb_serial_port *port = serial->port[0];
1154 struct ftdi_private *priv;
1155 struct ftdi_sio_quirk *quirk;
1157 dbg("%s",__FUNCTION__);
1159 priv = kzalloc(sizeof(struct ftdi_private), GFP_KERNEL);
1161 err("%s- kmalloc(%Zd) failed.", __FUNCTION__, sizeof(struct ftdi_private));
1165 spin_lock_init(&priv->rx_lock);
1166 spin_lock_init(&priv->tx_lock);
1167 init_waitqueue_head(&priv->delta_msr_wait);
1168 /* This will push the characters through immediately rather
1169 than queue a task to deliver them */
1170 priv->flags = ASYNC_LOW_LATENCY;
1172 /* Increase the size of read buffers */
1173 kfree(port->bulk_in_buffer);
1174 port->bulk_in_buffer = kmalloc (BUFSZ, GFP_KERNEL);
1175 if (!port->bulk_in_buffer) {
1179 if (port->read_urb) {
1180 port->read_urb->transfer_buffer = port->bulk_in_buffer;
1181 port->read_urb->transfer_buffer_length = BUFSZ;
1184 INIT_WORK(&priv->rx_work, ftdi_process_read, port);
1186 /* Free port's existing write urb and transfer buffer. */
1187 if (port->write_urb) {
1188 usb_free_urb (port->write_urb);
1189 port->write_urb = NULL;
1191 kfree(port->bulk_out_buffer);
1192 port->bulk_out_buffer = NULL;
1194 usb_set_serial_port_data(serial->port[0], priv);
1196 ftdi_determine_type (serial->port[0]);
1197 create_sysfs_attrs(serial);
1199 /* Check for device requiring special set up. */
1200 quirk = (struct ftdi_sio_quirk *)usb_get_serial_data(serial);
1201 if (quirk && quirk->setup) {
1202 quirk->setup(serial);
1206 } /* ftdi_sio_attach */
1209 /* Setup for the USB-UIRT device, which requires hardwired
1210 * baudrate (38400 gets mapped to 312500) */
1211 /* Called from usbserial:serial_probe */
1212 static void ftdi_USB_UIRT_setup (struct usb_serial *serial)
1214 struct ftdi_private *priv;
1216 dbg("%s",__FUNCTION__);
1218 priv = usb_get_serial_port_data(serial->port[0]);
1219 priv->flags |= ASYNC_SPD_CUST;
1220 priv->custom_divisor = 77;
1221 priv->force_baud = B38400;
1222 } /* ftdi_USB_UIRT_setup */
1224 /* Setup for the HE-TIRA1 device, which requires hardwired
1225 * baudrate (38400 gets mapped to 100000) and RTS-CTS enabled. */
1226 static void ftdi_HE_TIRA1_setup (struct usb_serial *serial)
1228 struct ftdi_private *priv;
1230 dbg("%s",__FUNCTION__);
1232 priv = usb_get_serial_port_data(serial->port[0]);
1233 priv->flags |= ASYNC_SPD_CUST;
1234 priv->custom_divisor = 240;
1235 priv->force_baud = B38400;
1236 priv->force_rtscts = 1;
1237 } /* ftdi_HE_TIRA1_setup */
1240 /* ftdi_shutdown is called from usbserial:usb_serial_disconnect
1241 * it is called when the usb device is disconnected
1243 * usbserial:usb_serial_disconnect
1244 * calls __serial_close for each open of the port
1245 * shutdown is called then (ie ftdi_shutdown)
1249 static void ftdi_shutdown (struct usb_serial *serial)
1250 { /* ftdi_shutdown */
1252 struct usb_serial_port *port = serial->port[0];
1253 struct ftdi_private *priv = usb_get_serial_port_data(port);
1255 dbg("%s", __FUNCTION__);
1257 remove_sysfs_attrs(serial);
1259 /* all open ports are closed at this point
1260 * (by usbserial.c:__serial_close, which calls ftdi_close)
1264 usb_set_serial_port_data(port, NULL);
1267 } /* ftdi_shutdown */
1270 static int ftdi_open (struct usb_serial_port *port, struct file *filp)
1272 struct termios tmp_termios;
1273 struct usb_device *dev = port->serial->dev;
1274 struct ftdi_private *priv = usb_get_serial_port_data(port);
1275 unsigned long flags;
1278 char buf[1]; /* Needed for the usb_control_msg I think */
1280 dbg("%s", __FUNCTION__);
1283 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1285 /* No error checking for this (will get errors later anyway) */
1286 /* See ftdi_sio.h for description of what is reset */
1287 usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1288 FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE,
1290 priv->interface, buf, 0, WDR_TIMEOUT);
1292 /* Termios defaults are set by usb_serial_init. We don't change
1293 port->tty->termios - this would loose speed settings, etc.
1294 This is same behaviour as serial.c/rs_open() - Kuba */
1296 /* ftdi_set_termios will send usb control messages */
1297 ftdi_set_termios(port, &tmp_termios);
1299 /* FIXME: Flow control might be enabled, so it should be checked -
1300 we have no control of defaults! */
1301 /* Turn on RTS and DTR since we are not flow controlling by default */
1302 set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1305 spin_lock_irqsave(&priv->rx_lock, flags);
1306 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
1307 spin_unlock_irqrestore(&priv->rx_lock, flags);
1309 /* Start reading from the device */
1310 priv->rx_processed = 0;
1311 usb_fill_bulk_urb(port->read_urb, dev,
1312 usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress),
1313 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
1314 ftdi_read_bulk_callback, port);
1315 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
1317 err("%s - failed submitting read urb, error %d", __FUNCTION__, result);
1326 * usbserial:__serial_close only calls ftdi_close if the point is open
1328 * This only gets called when it is the last close
1333 static void ftdi_close (struct usb_serial_port *port, struct file *filp)
1335 unsigned int c_cflag = port->tty->termios->c_cflag;
1336 struct ftdi_private *priv = usb_get_serial_port_data(port);
1339 dbg("%s", __FUNCTION__);
1341 if (c_cflag & HUPCL){
1342 /* Disable flow control */
1343 if (usb_control_msg(port->serial->dev,
1344 usb_sndctrlpipe(port->serial->dev, 0),
1345 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1346 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1347 0, priv->interface, buf, 0,
1349 err("error from flowcontrol urb");
1352 /* drop RTS and DTR */
1353 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1354 } /* Note change no line if hupcl is off */
1356 /* cancel any scheduled reading */
1357 cancel_delayed_work(&priv->rx_work);
1358 flush_scheduled_work();
1360 /* shutdown our bulk read */
1362 usb_kill_urb(port->read_urb);
1367 /* The SIO requires the first byte to have:
1370 * B2..7 length of message excluding byte 0
1372 * The new devices do not require this byte
1374 static int ftdi_write (struct usb_serial_port *port,
1375 const unsigned char *buf, int count)
1377 struct ftdi_private *priv = usb_get_serial_port_data(port);
1379 unsigned char *buffer;
1380 int data_offset ; /* will be 1 for the SIO and 0 otherwise */
1383 unsigned long flags;
1385 dbg("%s port %d, %d bytes", __FUNCTION__, port->number, count);
1388 dbg("write request of 0 bytes");
1391 spin_lock_irqsave(&priv->tx_lock, flags);
1392 if (priv->tx_outstanding_urbs > URB_UPPER_LIMIT) {
1393 spin_unlock_irqrestore(&priv->tx_lock, flags);
1394 dbg("%s - write limit hit\n", __FUNCTION__);
1397 spin_unlock_irqrestore(&priv->tx_lock, flags);
1399 data_offset = priv->write_offset;
1400 dbg("data_offset set to %d",data_offset);
1402 /* Determine total transfer size */
1403 transfer_size = count;
1404 if (data_offset > 0) {
1405 /* Original sio needs control bytes too... */
1406 transfer_size += (data_offset *
1407 ((count + (PKTSZ - 1 - data_offset)) /
1408 (PKTSZ - data_offset)));
1411 buffer = kmalloc (transfer_size, GFP_ATOMIC);
1413 err("%s ran out of kernel memory for urb ...", __FUNCTION__);
1417 urb = usb_alloc_urb(0, GFP_ATOMIC);
1419 err("%s - no more free urbs", __FUNCTION__);
1425 if (data_offset > 0) {
1426 /* Original sio requires control byte at start of each packet. */
1427 int user_pktsz = PKTSZ - data_offset;
1429 unsigned char *first_byte = buffer;
1430 const unsigned char *current_position = buf;
1433 if (user_pktsz > todo) {
1436 /* Write the control byte at the front of the packet*/
1437 *first_byte = 1 | ((user_pktsz) << 2);
1438 /* Copy data for packet */
1439 memcpy (first_byte + data_offset,
1440 current_position, user_pktsz);
1441 first_byte += user_pktsz + data_offset;
1442 current_position += user_pktsz;
1446 /* No control byte required. */
1447 /* Copy in the data to send */
1448 memcpy (buffer, buf, count);
1451 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, buffer);
1453 /* fill the buffer and send it */
1454 usb_fill_bulk_urb(urb, port->serial->dev,
1455 usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress),
1456 buffer, transfer_size,
1457 ftdi_write_bulk_callback, port);
1459 status = usb_submit_urb(urb, GFP_ATOMIC);
1461 err("%s - failed submitting write urb, error %d", __FUNCTION__, status);
1465 spin_lock_irqsave(&priv->tx_lock, flags);
1466 ++priv->tx_outstanding_urbs;
1467 priv->tx_outstanding_bytes += count;
1468 spin_unlock_irqrestore(&priv->tx_lock, flags);
1471 /* we are done with this urb, so let the host driver
1472 * really free it when it is finished with it */
1475 dbg("%s write returning: %d", __FUNCTION__, count);
1480 /* This function may get called when the device is closed */
1482 static void ftdi_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
1484 unsigned long flags;
1485 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1486 struct ftdi_private *priv;
1487 int data_offset; /* will be 1 for the SIO and 0 otherwise */
1488 unsigned long countback;
1490 /* free up the transfer buffer, as usb_free_urb() does not do this */
1491 kfree (urb->transfer_buffer);
1493 dbg("%s - port %d", __FUNCTION__, port->number);
1496 dbg("nonzero write bulk status received: %d", urb->status);
1500 priv = usb_get_serial_port_data(port);
1502 dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
1505 /* account for transferred data */
1506 countback = urb->actual_length;
1507 data_offset = priv->write_offset;
1508 if (data_offset > 0) {
1509 /* Subtract the control bytes */
1510 countback -= (data_offset * ((countback + (PKTSZ - 1)) / PKTSZ));
1512 spin_lock_irqsave(&priv->tx_lock, flags);
1513 --priv->tx_outstanding_urbs;
1514 priv->tx_outstanding_bytes -= countback;
1515 spin_unlock_irqrestore(&priv->tx_lock, flags);
1517 schedule_work(&port->work);
1518 } /* ftdi_write_bulk_callback */
1521 static int ftdi_write_room( struct usb_serial_port *port )
1523 struct ftdi_private *priv = usb_get_serial_port_data(port);
1525 unsigned long flags;
1527 dbg("%s - port %d", __FUNCTION__, port->number);
1529 spin_lock_irqsave(&priv->tx_lock, flags);
1530 if (priv->tx_outstanding_urbs < URB_UPPER_LIMIT) {
1532 * We really can take anything the user throws at us
1533 * but let's pick a nice big number to tell the tty
1534 * layer that we have lots of free space
1540 spin_unlock_irqrestore(&priv->tx_lock, flags);
1542 } /* ftdi_write_room */
1545 static int ftdi_chars_in_buffer (struct usb_serial_port *port)
1546 { /* ftdi_chars_in_buffer */
1547 struct ftdi_private *priv = usb_get_serial_port_data(port);
1549 unsigned long flags;
1551 dbg("%s - port %d", __FUNCTION__, port->number);
1553 spin_lock_irqsave(&priv->tx_lock, flags);
1554 buffered = (int)priv->tx_outstanding_bytes;
1555 spin_unlock_irqrestore(&priv->tx_lock, flags);
1557 err("%s outstanding tx bytes is negative!", __FUNCTION__);
1561 } /* ftdi_chars_in_buffer */
1565 static void ftdi_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
1566 { /* ftdi_read_bulk_callback */
1567 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1568 struct tty_struct *tty;
1569 struct ftdi_private *priv;
1571 if (urb->number_of_packets > 0) {
1572 err("%s transfer_buffer_length %d actual_length %d number of packets %d",__FUNCTION__,
1573 urb->transfer_buffer_length, urb->actual_length, urb->number_of_packets );
1574 err("%s transfer_flags %x ", __FUNCTION__,urb->transfer_flags );
1577 dbg("%s - port %d", __FUNCTION__, port->number);
1579 if (port->open_count <= 0)
1584 dbg("%s - bad tty pointer - exiting",__FUNCTION__);
1588 priv = usb_get_serial_port_data(port);
1590 dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
1594 if (urb != port->read_urb) {
1595 err("%s - Not my urb!", __FUNCTION__);
1599 /* This will happen at close every time so it is a dbg not an err */
1600 dbg("(this is ok on close) nonzero read bulk status received: %d", urb->status);
1604 ftdi_process_read(port);
1606 } /* ftdi_read_bulk_callback */
1609 static void ftdi_process_read (void *param)
1610 { /* ftdi_process_read */
1611 struct usb_serial_port *port = (struct usb_serial_port*)param;
1613 struct tty_struct *tty;
1614 struct ftdi_private *priv;
1616 unsigned char *data;
1622 unsigned long flags;
1624 dbg("%s - port %d", __FUNCTION__, port->number);
1626 if (port->open_count <= 0)
1631 dbg("%s - bad tty pointer - exiting",__FUNCTION__);
1635 priv = usb_get_serial_port_data(port);
1637 dbg("%s - bad port private data pointer - exiting", __FUNCTION__);
1641 urb = port->read_urb;
1643 dbg("%s - bad read_urb pointer - exiting", __FUNCTION__);
1647 data = urb->transfer_buffer;
1649 if (priv->rx_processed) {
1650 dbg("%s - already processed: %d bytes, %d remain", __FUNCTION__,
1652 urb->actual_length - priv->rx_processed);
1654 /* The first two bytes of every read packet are status */
1655 if (urb->actual_length > 2) {
1656 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
1658 dbg("Status only: %03oo %03oo",data[0],data[1]);
1663 /* TO DO -- check for hung up line and handle appropriately: */
1665 /* See acm.c - you do a tty_hangup - eg tty_hangup(tty) */
1666 /* if CD is dropped and the line is not CLOCAL then we should hangup */
1669 for (packet_offset = priv->rx_processed; packet_offset < urb->actual_length; packet_offset += PKTSZ) {
1672 /* Compare new line status to the old one, signal if different */
1673 /* N.B. packet may be processed more than once, but differences
1674 * are only processed once. */
1676 char new_status = data[packet_offset+0] & FTDI_STATUS_B0_MASK;
1677 if (new_status != priv->prev_status) {
1678 priv->diff_status |= new_status ^ priv->prev_status;
1679 wake_up_interruptible(&priv->delta_msr_wait);
1680 priv->prev_status = new_status;
1684 length = min(PKTSZ, urb->actual_length-packet_offset)-2;
1686 err("%s - bad packet length: %d", __FUNCTION__, length+2);
1690 if (priv->rx_flags & THROTTLED) {
1691 dbg("%s - throttled", __FUNCTION__);
1694 if (tty_buffer_request_room(tty, length) < length) {
1695 /* break out & wait for throttling/unthrottling to happen */
1696 dbg("%s - receive room low", __FUNCTION__);
1700 /* Handle errors and break */
1701 error_flag = TTY_NORMAL;
1702 /* Although the device uses a bitmask and hence can have multiple */
1703 /* errors on a packet - the order here sets the priority the */
1704 /* error is returned to the tty layer */
1706 if ( data[packet_offset+1] & FTDI_RS_OE ) {
1707 error_flag = TTY_OVERRUN;
1708 dbg("OVERRRUN error");
1710 if ( data[packet_offset+1] & FTDI_RS_BI ) {
1711 error_flag = TTY_BREAK;
1712 dbg("BREAK received");
1714 if ( data[packet_offset+1] & FTDI_RS_PE ) {
1715 error_flag = TTY_PARITY;
1716 dbg("PARITY error");
1718 if ( data[packet_offset+1] & FTDI_RS_FE ) {
1719 error_flag = TTY_FRAME;
1720 dbg("FRAMING error");
1723 for (i = 2; i < length+2; i++) {
1724 /* Note that the error flag is duplicated for
1725 every character received since we don't know
1726 which character it applied to */
1727 tty_insert_flip_char(tty, data[packet_offset+i], error_flag);
1732 #ifdef NOT_CORRECT_BUT_KEEPING_IT_FOR_NOW
1733 /* if a parity error is detected you get status packets forever
1734 until a character is sent without a parity error.
1735 This doesn't work well since the application receives a never
1736 ending stream of bad data - even though new data hasn't been sent.
1737 Therefore I (bill) have taken this out.
1738 However - this might make sense for framing errors and so on
1739 so I am leaving the code in for now.
1742 if (error_flag != TTY_NORMAL){
1743 dbg("error_flag is not normal");
1744 /* In this case it is just status - if that is an error send a bad character */
1745 if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
1746 tty_flip_buffer_push(tty);
1748 tty_insert_flip_char(tty, 0xff, error_flag);
1753 } /* "for(packet_offset=0..." */
1757 tty_flip_buffer_push(tty);
1760 if (packet_offset < urb->actual_length) {
1761 /* not completely processed - record progress */
1762 priv->rx_processed = packet_offset;
1763 dbg("%s - incomplete, %d bytes processed, %d remain",
1764 __FUNCTION__, packet_offset,
1765 urb->actual_length - packet_offset);
1766 /* check if we were throttled while processing */
1767 spin_lock_irqsave(&priv->rx_lock, flags);
1768 if (priv->rx_flags & THROTTLED) {
1769 priv->rx_flags |= ACTUALLY_THROTTLED;
1770 spin_unlock_irqrestore(&priv->rx_lock, flags);
1771 dbg("%s - deferring remainder until unthrottled",
1775 spin_unlock_irqrestore(&priv->rx_lock, flags);
1776 /* if the port is closed stop trying to read */
1777 if (port->open_count > 0){
1778 /* delay processing of remainder */
1779 schedule_delayed_work(&priv->rx_work, 1);
1781 dbg("%s - port is closed", __FUNCTION__);
1786 /* urb is completely processed */
1787 priv->rx_processed = 0;
1789 /* if the port is closed stop trying to read */
1790 if (port->open_count > 0){
1791 /* Continue trying to always read */
1792 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
1793 usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress),
1794 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
1795 ftdi_read_bulk_callback, port);
1797 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
1799 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
1803 } /* ftdi_process_read */
1806 static void ftdi_break_ctl( struct usb_serial_port *port, int break_state )
1808 struct ftdi_private *priv = usb_get_serial_port_data(port);
1809 __u16 urb_value = 0;
1812 /* break_state = -1 to turn on break, and 0 to turn off break */
1813 /* see drivers/char/tty_io.c to see it used */
1814 /* last_set_data_urb_value NEVER has the break bit set in it */
1817 urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK;
1819 urb_value = priv->last_set_data_urb_value;
1823 if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0),
1824 FTDI_SIO_SET_DATA_REQUEST,
1825 FTDI_SIO_SET_DATA_REQUEST_TYPE,
1826 urb_value , priv->interface,
1827 buf, 0, WDR_TIMEOUT) < 0) {
1828 err("%s FAILED to enable/disable break state (state was %d)", __FUNCTION__,break_state);
1831 dbg("%s break state is %d - urb is %d", __FUNCTION__,break_state, urb_value);
1836 /* old_termios contains the original termios settings and tty->termios contains
1837 * the new setting to be used
1838 * WARNING: set_termios calls this with old_termios in kernel space
1841 static void ftdi_set_termios (struct usb_serial_port *port, struct termios *old_termios)
1842 { /* ftdi_termios */
1843 struct usb_device *dev = port->serial->dev;
1844 unsigned int cflag = port->tty->termios->c_cflag;
1845 struct ftdi_private *priv = usb_get_serial_port_data(port);
1846 __u16 urb_value; /* will hold the new flags */
1847 char buf[1]; /* Perhaps I should dynamically alloc this? */
1849 // Added for xon/xoff support
1850 unsigned int iflag = port->tty->termios->c_iflag;
1851 unsigned char vstop;
1852 unsigned char vstart;
1854 dbg("%s", __FUNCTION__);
1856 /* Force baud rate if this device requires it, unless it is set to B0. */
1857 if (priv->force_baud && ((port->tty->termios->c_cflag & CBAUD) != B0)) {
1858 dbg("%s: forcing baud rate for this device", __FUNCTION__);
1859 port->tty->termios->c_cflag &= ~CBAUD;
1860 port->tty->termios->c_cflag |= priv->force_baud;
1863 /* Force RTS-CTS if this device requires it. */
1864 if (priv->force_rtscts) {
1865 dbg("%s: forcing rtscts for this device", __FUNCTION__);
1866 port->tty->termios->c_cflag |= CRTSCTS;
1869 cflag = port->tty->termios->c_cflag;
1871 /* FIXME -For this cut I don't care if the line is really changing or
1872 not - so just do the change regardless - should be able to
1873 compare old_termios and tty->termios */
1874 /* NOTE These routines can get interrupted by
1875 ftdi_sio_read_bulk_callback - need to examine what this
1876 means - don't see any problems yet */
1878 /* Set number of data bits, parity, stop bits */
1881 urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 :
1882 FTDI_SIO_SET_DATA_STOP_BITS_1);
1883 urb_value |= (cflag & PARENB ?
1884 (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD :
1885 FTDI_SIO_SET_DATA_PARITY_EVEN) :
1886 FTDI_SIO_SET_DATA_PARITY_NONE);
1887 if (cflag & CSIZE) {
1888 switch (cflag & CSIZE) {
1889 case CS5: urb_value |= 5; dbg("Setting CS5"); break;
1890 case CS6: urb_value |= 6; dbg("Setting CS6"); break;
1891 case CS7: urb_value |= 7; dbg("Setting CS7"); break;
1892 case CS8: urb_value |= 8; dbg("Setting CS8"); break;
1894 err("CSIZE was set but not CS5-CS8");
1898 /* This is needed by the break command since it uses the same command - but is
1899 * or'ed with this value */
1900 priv->last_set_data_urb_value = urb_value;
1902 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1903 FTDI_SIO_SET_DATA_REQUEST,
1904 FTDI_SIO_SET_DATA_REQUEST_TYPE,
1905 urb_value , priv->interface,
1906 buf, 0, WDR_SHORT_TIMEOUT) < 0) {
1907 err("%s FAILED to set databits/stopbits/parity", __FUNCTION__);
1910 /* Now do the baudrate */
1911 if ((cflag & CBAUD) == B0 ) {
1912 /* Disable flow control */
1913 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1914 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1915 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1917 buf, 0, WDR_TIMEOUT) < 0) {
1918 err("%s error from disable flowcontrol urb", __FUNCTION__);
1920 /* Drop RTS and DTR */
1921 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1923 /* set the baudrate determined before */
1924 if (change_speed(port)) {
1925 err("%s urb failed to set baudrate", __FUNCTION__);
1927 /* Ensure RTS and DTR are raised when baudrate changed from 0 */
1928 if ((old_termios->c_cflag & CBAUD) == B0) {
1929 set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
1933 /* Set flow control */
1934 /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */
1935 if (cflag & CRTSCTS) {
1936 dbg("%s Setting to CRTSCTS flow control", __FUNCTION__);
1937 if (usb_control_msg(dev,
1938 usb_sndctrlpipe(dev, 0),
1939 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1940 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1941 0 , (FTDI_SIO_RTS_CTS_HS | priv->interface),
1942 buf, 0, WDR_TIMEOUT) < 0) {
1943 err("urb failed to set to rts/cts flow control");
1950 * Check the IXOFF status in the iflag component of the termios structure
1951 * if IXOFF is not set, the pre-xon/xoff code is executed.
1953 if (iflag & IXOFF) {
1954 dbg("%s request to enable xonxoff iflag=%04x",__FUNCTION__,iflag);
1955 // Try to enable the XON/XOFF on the ftdi_sio
1956 // Set the vstart and vstop -- could have been done up above where
1957 // a lot of other dereferencing is done but that would be very
1958 // inefficient as vstart and vstop are not always needed
1959 vstart=port->tty->termios->c_cc[VSTART];
1960 vstop=port->tty->termios->c_cc[VSTOP];
1961 urb_value=(vstop << 8) | (vstart);
1963 if (usb_control_msg(dev,
1964 usb_sndctrlpipe(dev, 0),
1965 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1966 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1967 urb_value , (FTDI_SIO_XON_XOFF_HS
1969 buf, 0, WDR_TIMEOUT) < 0) {
1970 err("urb failed to set to xon/xoff flow control");
1973 /* else clause to only run if cfag ! CRTSCTS and iflag ! XOFF */
1974 /* CHECKME Assuming XON/XOFF handled by tty stack - not by device */
1975 dbg("%s Turning off hardware flow control", __FUNCTION__);
1976 if (usb_control_msg(dev,
1977 usb_sndctrlpipe(dev, 0),
1978 FTDI_SIO_SET_FLOW_CTRL_REQUEST,
1979 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
1981 buf, 0, WDR_TIMEOUT) < 0) {
1982 err("urb failed to clear flow control");
1988 } /* ftdi_termios */
1991 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file)
1993 struct ftdi_private *priv = usb_get_serial_port_data(port);
1994 unsigned char buf[2];
1997 dbg("%s TIOCMGET", __FUNCTION__);
1998 switch (priv->chip_type) {
2000 /* Request the status from the device */
2001 if ((ret = usb_control_msg(port->serial->dev,
2002 usb_rcvctrlpipe(port->serial->dev, 0),
2003 FTDI_SIO_GET_MODEM_STATUS_REQUEST,
2004 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
2006 buf, 1, WDR_TIMEOUT)) < 0 ) {
2007 err("%s Could not get modem status of device - err: %d", __FUNCTION__,
2015 /* the 8U232AM returns a two byte value (the sio is a 1 byte value) - in the same
2016 format as the data returned from the in point */
2017 if ((ret = usb_control_msg(port->serial->dev,
2018 usb_rcvctrlpipe(port->serial->dev, 0),
2019 FTDI_SIO_GET_MODEM_STATUS_REQUEST,
2020 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
2022 buf, 2, WDR_TIMEOUT)) < 0 ) {
2023 err("%s Could not get modem status of device - err: %d", __FUNCTION__,
2033 return (buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) |
2034 (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) |
2035 (buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) |
2036 (buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0) |
2040 static int ftdi_tiocmset(struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear)
2042 dbg("%s TIOCMSET", __FUNCTION__);
2043 return update_mctrl(port, set, clear);
2047 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
2049 struct ftdi_private *priv = usb_get_serial_port_data(port);
2051 dbg("%s cmd 0x%04x", __FUNCTION__, cmd);
2053 /* Based on code from acm.c and others */
2056 case TIOCGSERIAL: /* gets serial port data */
2057 return get_serial_info(port, (struct serial_struct __user *) arg);
2059 case TIOCSSERIAL: /* sets serial port data */
2060 return set_serial_info(port, (struct serial_struct __user *) arg);
2063 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
2064 * - mask passed in arg for lines of interest
2065 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
2066 * Caller should use TIOCGICOUNT to see which one it was.
2068 * This code is borrowed from linux/drivers/char/serial.c
2071 while (priv != NULL) {
2072 interruptible_sleep_on(&priv->delta_msr_wait);
2073 /* see if a signal did it */
2074 if (signal_pending(current))
2075 return -ERESTARTSYS;
2077 char diff = priv->diff_status;
2080 return -EIO; /* no change => error */
2083 /* Consume all events */
2084 priv->diff_status = 0;
2086 /* Return 0 if caller wanted to know about these bits */
2087 if ( ((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) ||
2088 ((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) ||
2089 ((arg & TIOCM_CD) && (diff & FTDI_RS0_RLSD)) ||
2090 ((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS)) ) {
2094 * Otherwise caller can't care less about what happened,
2095 * and so we continue to wait for more events.
2107 /* This is not necessarily an error - turns out the higher layers will do
2108 * some ioctls itself (see comment above)
2110 dbg("%s arg not supported - it was 0x%04x - check /usr/include/asm/ioctls.h", __FUNCTION__, cmd);
2112 return(-ENOIOCTLCMD);
2116 static void ftdi_throttle (struct usb_serial_port *port)
2118 struct ftdi_private *priv = usb_get_serial_port_data(port);
2119 unsigned long flags;
2121 dbg("%s - port %d", __FUNCTION__, port->number);
2123 spin_lock_irqsave(&priv->rx_lock, flags);
2124 priv->rx_flags |= THROTTLED;
2125 spin_unlock_irqrestore(&priv->rx_lock, flags);
2129 static void ftdi_unthrottle (struct usb_serial_port *port)
2131 struct ftdi_private *priv = usb_get_serial_port_data(port);
2132 int actually_throttled;
2133 unsigned long flags;
2135 dbg("%s - port %d", __FUNCTION__, port->number);
2137 spin_lock_irqsave(&priv->rx_lock, flags);
2138 actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED;
2139 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
2140 spin_unlock_irqrestore(&priv->rx_lock, flags);
2142 if (actually_throttled)
2143 schedule_work(&priv->rx_work);
2146 static int __init ftdi_init (void)
2150 dbg("%s", __FUNCTION__);
2151 if (vendor > 0 && product > 0) {
2152 /* Add user specified VID/PID to reserved element of table. */
2154 for (i = 0; id_table_combined[i].idVendor; i++)
2156 id_table_combined[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
2157 id_table_combined[i].idVendor = vendor;
2158 id_table_combined[i].idProduct = product;
2160 retval = usb_serial_register(&ftdi_sio_device);
2162 goto failed_sio_register;
2163 retval = usb_register(&ftdi_driver);
2165 goto failed_usb_register;
2167 info(DRIVER_VERSION ":" DRIVER_DESC);
2169 failed_usb_register:
2170 usb_serial_deregister(&ftdi_sio_device);
2171 failed_sio_register:
2176 static void __exit ftdi_exit (void)
2179 dbg("%s", __FUNCTION__);
2181 usb_deregister (&ftdi_driver);
2182 usb_serial_deregister (&ftdi_sio_device);
2187 module_init(ftdi_init);
2188 module_exit(ftdi_exit);
2190 MODULE_AUTHOR( DRIVER_AUTHOR );
2191 MODULE_DESCRIPTION( DRIVER_DESC );
2192 MODULE_LICENSE("GPL");
2194 module_param(debug, bool, S_IRUGO | S_IWUSR);
2195 MODULE_PARM_DESC(debug, "Debug enabled or not");
2196 module_param(vendor, ushort, 0);
2197 MODULE_PARM_DESC(vendor, "User specified vendor ID (default="
2198 __MODULE_STRING(FTDI_VID)")");
2199 module_param(product, ushort, 0);
2200 MODULE_PARM_DESC(vendor, "User specified product ID");