1 /* 2 * USB FTDI SIO driver 3 * 4 * Copyright (C) 1999 - 2001 5 * Greg Kroah-Hartman (greg@kroah.com) 6 * Bill Ryder (bryder@sgi.com) 7 * Copyright (C) 2002 8 * Kuba Ober (kuba@mareimbrium.org) 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * See Documentation/usb/usb-serial.txt for more information on using this driver 16 * 17 * See http://ftdi-usb-sio.sourceforge.net for upto date testing info 18 * and extra documentation 19 * 20 * (21/Jul/2004) Ian Abbott 21 * Incorporated Steven Turner's code to add support for the FT2232C chip. 22 * The prelimilary port to the 2.6 kernel was by Rus V. Brushkoff. I have 23 * fixed a couple of things. 24 * 25 * (27/May/2004) Ian Abbott 26 * Improved throttling code, mostly stolen from the WhiteHEAT driver. 27 * 28 * (26/Mar/2004) Jan Capek 29 * Added PID's for ICD-U20/ICD-U40 - incircuit PIC debuggers from CCS Inc. 30 * 31 * (09/Feb/2004) Ian Abbott 32 * Changed full name of USB-UIRT device to avoid "/" character. 33 * Added FTDI's alternate PID (0x6006) for FT232/245 devices. 34 * Added PID for "ELV USB Module UO100" from Stefan Frings. 35 * 36 * (21/Oct/2003) Ian Abbott 37 * Renamed some VID/PID macros for Matrix Orbital and Perle Systems 38 * devices. Removed Matrix Orbital and Perle Systems devices from the 39 * 8U232AM device table, but left them in the FT232BM table, as they are 40 * known to use only FT232BM. 41 * 42 * (17/Oct/2003) Scott Allen 43 * Added vid/pid for Perle Systems UltraPort USB serial converters 44 * 45 * (21/Sep/2003) Ian Abbott 46 * Added VID/PID for Omnidirectional Control Technology US101 USB to 47 * RS-232 adapter (also rebadged as Dick Smith Electronics XH6381). 48 * VID/PID supplied by Donald Gordon. 49 * 50 * (19/Aug/2003) Ian Abbott 51 * Freed urb's transfer buffer in write bulk callback. 52 * Omitted some paranoid checks in write bulk callback that don't matter. 53 * Scheduled work in write bulk callback regardless of port's open count. 54 * 55 * (05/Aug/2003) Ian Abbott 56 * Added VID/PID for ID TECH IDT1221U USB to RS-232 adapter. 57 * VID/PID provided by Steve Briggs. 58 * 59 * (23/Jul/2003) Ian Abbott 60 * Added PIDs for CrystalFontz 547, 633, 631, 635, 640 and 640 from 61 * Wayne Wylupski. 62 * 63 * (10/Jul/2003) David Glance 64 * Added PID for DSS-20 SyncStation cradle for Sony-Ericsson P800. 65 * 66 * (27/Jun/2003) Ian Abbott 67 * Reworked the urb handling logic. We have no more pool, but dynamically 68 * allocate the urb and the transfer buffer on the fly. In testing this 69 * does not incure any measurable overhead. This also relies on the fact 70 * that we have proper reference counting logic for urbs. I nicked this 71 * from Greg KH's Visor driver. 72 * 73 * (23/Jun/2003) Ian Abbott 74 * Reduced flip buffer pushes and corrected a data length test in 75 * ftdi_read_bulk_callback. 76 * Defererence pointers after any paranoid checks, not before. 77 * 78 * (21/Jun/2003) Erik Nygren 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. 83 * 84 * (18/Jun/2003) Ian Abbott 85 * Added Device ID of the USB relais from Rudolf Gugler (backported from 86 * Philipp G�hring'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. 92 * 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. 97 * 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 103 * 104 * (11/Jun/2003) Ian Abbott 105 * Fixed unsafe spinlock usage in ftdi_write 106 * 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) 110 * 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) 114 * 115 * (23/Feb/2003) Bill Ryder 116 * Added matrix orb device vid/pids from Wayne Wylupski 117 * 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. 123 * 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 129 * to FT8U232AM). 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. 136 * 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 142 * some driver bugs) 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 147 * 148 * 149 * 150 * 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. 158 * 159 * (25/Jul/2002) Bill Ryder inserted Dmitri's TIOCMIWAIT patch 160 * Not tested by me but it doesn't break anything I use. 161 * 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 169 * and 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 ;-]. 173 * 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 181 * was wrong anyway. 182 * 183 * (31/May/2001) gkh 184 * Switched from using spinlock to a semaphore, which fixes lots of problems. 185 * 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. 191 * 192 * (04/08/2001) gb 193 * Identify version on module load. 194 * 195 * (18/March/2001) Bill Ryder 196 * (Not released) 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 200 * 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. 207 * 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 214 * 215 * (11/01/2000) Adam J. Richter 216 * usb_device_id table support 217 * 218 * (10/05/2000) gkh 219 * Fixed bug with urb->dev not being set properly, now that the usb 220 * core needs it. 221 * 222 * (09/11/2000) gkh 223 * Removed DEBUG #ifdefs with call to usb_serial_debug_data 224 * 225 * (07/19/2000) gkh 226 * Added module_init and module_exit functions to handle the fact that this 227 * driver is a loadable module now. 228 * 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). 232 * 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 237 * 238 * (03/26/2000) gkh 239 * Split driver up into device specific pieces. 240 * 241 */ 242 243 /* 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 :-) */ 247 248 #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" 263 264 /* 265 * Version Information 266 */ 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" 270 271 static int debug; 272 static __u16 vendor = FTDI_VID; 273 static __u16 product; 274 275 /* 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. */ 278 }; 279 280 static void ftdi_USB_UIRT_setup (struct usb_serial *serial); 281 static void ftdi_HE_TIRA1_setup (struct usb_serial *serial); 282 283 static struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = { 284 .setup = ftdi_USB_UIRT_setup, 285 }; 286 287 static struct ftdi_sio_quirk ftdi_HE_TIRA1_quirk = { 288 .setup = ftdi_HE_TIRA1_setup, 289 }; 290 291 /* 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 295 * o 230400 at 12MHz 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) 299 * 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] 305 */ 306 307 308 309 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) }, 418 /* 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. 423 */ 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 { USB_DEVICE(FTDI_VID, FTDI_YEI_SERVOCENTER31_PID) }, 504 { }, /* Optional parameter entry */ 505 { } /* Terminating entry */ 506 }; 507 508 MODULE_DEVICE_TABLE (usb, id_table_combined); 509 510 static struct usb_driver ftdi_driver = { 511 .name = "ftdi_sio", 512 .probe = usb_serial_probe, 513 .disconnect = usb_serial_disconnect, 514 .id_table = id_table_combined, 515 .no_dynamic_id = 1, 516 }; 517 518 static const char *ftdi_chip_name[] = { 519 [SIO] = "SIO", /* the serial part of FT8U100AX */ 520 [FT8U232AM] = "FT8U232AM", 521 [FT232BM] = "FT232BM", 522 [FT2232C] = "FT2232C", 523 }; 524 525 526 /* Constants for read urb and write urb */ 527 #define BUFSZ 512 528 #define PKTSZ 64 529 530 /* rx_flags */ 531 #define THROTTLED 0x01 532 #define ACTUALLY_THROTTLED 0x02 533 534 struct ftdi_private { 535 ftdi_chip_type_t chip_type; 536 /* type of the device, either SIO or FT8U232AM */ 537 int baud_base; /* baud base clock for divisor setting */ 538 int custom_divisor; /* custom_divisor kludge, this is for baud_base (different from what goes to the chip!) */ 539 __u16 last_set_data_urb_value ; 540 /* the last data state set - needed for doing a break */ 541 int write_offset; /* This is the offset in the usb data block to write the serial data - 542 * it is different between devices 543 */ 544 int flags; /* some ASYNC_xxxx flags are supported */ 545 unsigned long last_dtr_rts; /* saved modem control outputs */ 546 wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */ 547 char prev_status, diff_status; /* Used for TIOCMIWAIT */ 548 __u8 rx_flags; /* receive state flags (throttling) */ 549 spinlock_t rx_lock; /* spinlock for receive state */ 550 struct work_struct rx_work; 551 int rx_processed; 552 553 __u16 interface; /* FT2232C port interface (0 for FT232/245) */ 554 555 int force_baud; /* if non-zero, force the baud rate to this value */ 556 int force_rtscts; /* if non-zero, force RTS-CTS to always be enabled */ 557 }; 558 559 /* Used for TIOCMIWAIT */ 560 #define FTDI_STATUS_B0_MASK (FTDI_RS0_CTS | FTDI_RS0_DSR | FTDI_RS0_RI | FTDI_RS0_RLSD) 561 #define FTDI_STATUS_B1_MASK (FTDI_RS_BI) 562 /* End TIOCMIWAIT */ 563 564 #define FTDI_IMPL_ASYNC_FLAGS = ( ASYNC_SPD_HI | ASYNC_SPD_VHI \ 565 ASYNC_SPD_CUST | ASYNC_SPD_SHI | ASYNC_SPD_WARP ) 566 567 /* function prototypes for a FTDI serial converter */ 568 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id); 569 static int ftdi_sio_attach (struct usb_serial *serial); 570 static void ftdi_shutdown (struct usb_serial *serial); 571 static int ftdi_open (struct usb_serial_port *port, struct file *filp); 572 static void ftdi_close (struct usb_serial_port *port, struct file *filp); 573 static int ftdi_write (struct usb_serial_port *port, const unsigned char *buf, int count); 574 static int ftdi_write_room (struct usb_serial_port *port); 575 static int ftdi_chars_in_buffer (struct usb_serial_port *port); 576 static void ftdi_write_bulk_callback (struct urb *urb, struct pt_regs *regs); 577 static void ftdi_read_bulk_callback (struct urb *urb, struct pt_regs *regs); 578 static void ftdi_process_read (void *param); 579 static void ftdi_set_termios (struct usb_serial_port *port, struct termios * old); 580 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file); 581 static int ftdi_tiocmset (struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear); 582 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); 583 static void ftdi_break_ctl (struct usb_serial_port *port, int break_state ); 584 static void ftdi_throttle (struct usb_serial_port *port); 585 static void ftdi_unthrottle (struct usb_serial_port *port); 586 587 static unsigned short int ftdi_232am_baud_base_to_divisor (int baud, int base); 588 static unsigned short int ftdi_232am_baud_to_divisor (int baud); 589 static __u32 ftdi_232bm_baud_base_to_divisor (int baud, int base); 590 static __u32 ftdi_232bm_baud_to_divisor (int baud); 591 592 static struct usb_serial_driver ftdi_sio_device = { 593 .driver = { 594 .owner = THIS_MODULE, 595 .name = "ftdi_sio", 596 }, 597 .description = "FTDI USB Serial Device", 598 .id_table = id_table_combined, 599 .num_interrupt_in = 0, 600 .num_bulk_in = 1, 601 .num_bulk_out = 1, 602 .num_ports = 1, 603 .probe = ftdi_sio_probe, 604 .open = ftdi_open, 605 .close = ftdi_close, 606 .throttle = ftdi_throttle, 607 .unthrottle = ftdi_unthrottle, 608 .write = ftdi_write, 609 .write_room = ftdi_write_room, 610 .chars_in_buffer = ftdi_chars_in_buffer, 611 .read_bulk_callback = ftdi_read_bulk_callback, 612 .write_bulk_callback = ftdi_write_bulk_callback, 613 .tiocmget = ftdi_tiocmget, 614 .tiocmset = ftdi_tiocmset, 615 .ioctl = ftdi_ioctl, 616 .set_termios = ftdi_set_termios, 617 .break_ctl = ftdi_break_ctl, 618 .attach = ftdi_sio_attach, 619 .shutdown = ftdi_shutdown, 620 }; 621 622 623 #define WDR_TIMEOUT 5000 /* default urb timeout */ 624 #define WDR_SHORT_TIMEOUT 1000 /* shorter urb timeout */ 625 626 /* High and low are for DTR, RTS etc etc */ 627 #define HIGH 1 628 #define LOW 0 629 630 /* 631 * *************************************************************************** 632 * Utlity functions 633 * *************************************************************************** 634 */ 635 636 static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base) 637 { 638 unsigned short int divisor; 639 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left 640 if ((divisor3 & 0x7) == 7) divisor3 ++; // round x.7/8 up to x+1 641 divisor = divisor3 >> 3; 642 divisor3 &= 0x7; 643 if (divisor3 == 1) divisor |= 0xc000; else // 0.125 644 if (divisor3 >= 4) divisor |= 0x4000; else // 0.5 645 if (divisor3 != 0) divisor |= 0x8000; // 0.25 646 if (divisor == 1) divisor = 0; /* special case for maximum baud rate */ 647 return divisor; 648 } 649 650 static unsigned short int ftdi_232am_baud_to_divisor(int baud) 651 { 652 return(ftdi_232am_baud_base_to_divisor(baud, 48000000)); 653 } 654 655 static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base) 656 { 657 static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 }; 658 __u32 divisor; 659 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left 660 divisor = divisor3 >> 3; 661 divisor |= (__u32)divfrac[divisor3 & 0x7] << 14; 662 /* Deal with special cases for highest baud rates. */ 663 if (divisor == 1) divisor = 0; else // 1.0 664 if (divisor == 0x4001) divisor = 1; // 1.5 665 return divisor; 666 } 667 668 static __u32 ftdi_232bm_baud_to_divisor(int baud) 669 { 670 return(ftdi_232bm_baud_base_to_divisor(baud, 48000000)); 671 } 672 673 #define set_mctrl(port, set) update_mctrl((port), (set), 0) 674 #define clear_mctrl(port, clear) update_mctrl((port), 0, (clear)) 675 676 static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned int clear) 677 { 678 struct ftdi_private *priv = usb_get_serial_port_data(port); 679 char *buf; 680 unsigned urb_value; 681 int rv; 682 683 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { 684 dbg("%s - DTR|RTS not being set|cleared", __FUNCTION__); 685 return 0; /* no change */ 686 } 687 688 buf = kmalloc(1, GFP_NOIO); 689 if (!buf) { 690 return -ENOMEM; 691 } 692 693 clear &= ~set; /* 'set' takes precedence over 'clear' */ 694 urb_value = 0; 695 if (clear & TIOCM_DTR) 696 urb_value |= FTDI_SIO_SET_DTR_LOW; 697 if (clear & TIOCM_RTS) 698 urb_value |= FTDI_SIO_SET_RTS_LOW; 699 if (set & TIOCM_DTR) 700 urb_value |= FTDI_SIO_SET_DTR_HIGH; 701 if (set & TIOCM_RTS) 702 urb_value |= FTDI_SIO_SET_RTS_HIGH; 703 rv = usb_control_msg(port->serial->dev, 704 usb_sndctrlpipe(port->serial->dev, 0), 705 FTDI_SIO_SET_MODEM_CTRL_REQUEST, 706 FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, 707 urb_value, priv->interface, 708 buf, 0, WDR_TIMEOUT); 709 710 kfree(buf); 711 if (rv < 0) { 712 err("%s Error from MODEM_CTRL urb: DTR %s, RTS %s", 713 __FUNCTION__, 714 (set & TIOCM_DTR) ? "HIGH" : 715 (clear & TIOCM_DTR) ? "LOW" : "unchanged", 716 (set & TIOCM_RTS) ? "HIGH" : 717 (clear & TIOCM_RTS) ? "LOW" : "unchanged"); 718 } else { 719 dbg("%s - DTR %s, RTS %s", __FUNCTION__, 720 (set & TIOCM_DTR) ? "HIGH" : 721 (clear & TIOCM_DTR) ? "LOW" : "unchanged", 722 (set & TIOCM_RTS) ? "HIGH" : 723 (clear & TIOCM_RTS) ? "LOW" : "unchanged"); 724 priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set; 725 } 726 return rv; 727 } 728 729 730 static __u32 get_ftdi_divisor(struct usb_serial_port * port); 731 732 733 static int change_speed(struct usb_serial_port *port) 734 { 735 struct ftdi_private *priv = usb_get_serial_port_data(port); 736 char *buf; 737 __u16 urb_value; 738 __u16 urb_index; 739 __u32 urb_index_value; 740 int rv; 741 742 buf = kmalloc(1, GFP_NOIO); 743 if (!buf) 744 return -ENOMEM; 745 746 urb_index_value = get_ftdi_divisor(port); 747 urb_value = (__u16)urb_index_value; 748 urb_index = (__u16)(urb_index_value >> 16); 749 if (priv->interface) { /* FT2232C */ 750 urb_index = (__u16)((urb_index << 8) | priv->interface); 751 } 752 753 rv = usb_control_msg(port->serial->dev, 754 usb_sndctrlpipe(port->serial->dev, 0), 755 FTDI_SIO_SET_BAUDRATE_REQUEST, 756 FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE, 757 urb_value, urb_index, 758 buf, 0, WDR_SHORT_TIMEOUT); 759 760 kfree(buf); 761 return rv; 762 } 763 764 765 static __u32 get_ftdi_divisor(struct usb_serial_port * port) 766 { /* get_ftdi_divisor */ 767 struct ftdi_private *priv = usb_get_serial_port_data(port); 768 __u32 div_value = 0; 769 int div_okay = 1; 770 int baud; 771 772 /* 773 * The logic involved in setting the baudrate can be cleanly split in 3 steps. 774 * Obtaining the actual baud rate is a little tricky since unix traditionally 775 * somehow ignored the possibility to set non-standard baud rates. 776 * 1. Standard baud rates are set in tty->termios->c_cflag 777 * 2. If these are not enough, you can set any speed using alt_speed as follows: 778 * - set tty->termios->c_cflag speed to B38400 779 * - set your real speed in tty->alt_speed; it gets ignored when 780 * alt_speed==0, (or) 781 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows: 782 * flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP], this just 783 * sets alt_speed to (HI: 57600, VHI: 115200, SHI: 230400, WARP: 460800) 784 * ** Steps 1, 2 are done courtesy of tty_get_baud_rate 785 * 3. You can also set baud rate by setting custom divisor as follows 786 * - set tty->termios->c_cflag speed to B38400 787 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows: 788 * o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST 789 * o custom_divisor set to baud_base / your_new_baudrate 790 * ** Step 3 is done courtesy of code borrowed from serial.c - I should really 791 * spend some time and separate+move this common code to serial.c, it is 792 * replicated in nearly every serial driver you see. 793 */ 794 795 /* 1. Get the baud rate from the tty settings, this observes alt_speed hack */ 796 797 baud = tty_get_baud_rate(port->tty); 798 dbg("%s - tty_get_baud_rate reports speed %d", __FUNCTION__, baud); 799 800 /* 2. Observe async-compatible custom_divisor hack, update baudrate if needed */ 801 802 if (baud == 38400 && 803 ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) && 804 (priv->custom_divisor)) { 805 baud = priv->baud_base / priv->custom_divisor; 806 dbg("%s - custom divisor %d sets baud rate to %d", __FUNCTION__, priv->custom_divisor, baud); 807 } 808 809 /* 3. Convert baudrate to device-specific divisor */ 810 811 if (!baud) baud = 9600; 812 switch(priv->chip_type) { 813 case SIO: /* SIO chip */ 814 switch(baud) { 815 case 300: div_value = ftdi_sio_b300; break; 816 case 600: div_value = ftdi_sio_b600; break; 817 case 1200: div_value = ftdi_sio_b1200; break; 818 case 2400: div_value = ftdi_sio_b2400; break; 819 case 4800: div_value = ftdi_sio_b4800; break; 820 case 9600: div_value = ftdi_sio_b9600; break; 821 case 19200: div_value = ftdi_sio_b19200; break; 822 case 38400: div_value = ftdi_sio_b38400; break; 823 case 57600: div_value = ftdi_sio_b57600; break; 824 case 115200: div_value = ftdi_sio_b115200; break; 825 } /* baud */ 826 if (div_value == 0) { 827 dbg("%s - Baudrate (%d) requested is not supported", __FUNCTION__, baud); 828 div_value = ftdi_sio_b9600; 829 div_okay = 0; 830 } 831 break; 832 case FT8U232AM: /* 8U232AM chip */ 833 if (baud <= 3000000) { 834 div_value = ftdi_232am_baud_to_divisor(baud); 835 } else { 836 dbg("%s - Baud rate too high!", __FUNCTION__); 837 div_value = ftdi_232am_baud_to_divisor(9600); 838 div_okay = 0; 839 } 840 break; 841 case FT232BM: /* FT232BM chip */ 842 case FT2232C: /* FT2232C chip */ 843 if (baud <= 3000000) { 844 div_value = ftdi_232bm_baud_to_divisor(baud); 845 } else { 846 dbg("%s - Baud rate too high!", __FUNCTION__); 847 div_value = ftdi_232bm_baud_to_divisor(9600); 848 div_okay = 0; 849 } 850 break; 851 } /* priv->chip_type */ 852 853 if (div_okay) { 854 dbg("%s - Baud rate set to %d (divisor 0x%lX) on chip %s", 855 __FUNCTION__, baud, (unsigned long)div_value, 856 ftdi_chip_name[priv->chip_type]); 857 } 858 859 return(div_value); 860 } 861 862 863 static int get_serial_info(struct usb_serial_port * port, struct serial_struct __user * retinfo) 864 { 865 struct ftdi_private *priv = usb_get_serial_port_data(port); 866 struct serial_struct tmp; 867 868 if (!retinfo) 869 return -EFAULT; 870 memset(&tmp, 0, sizeof(tmp)); 871 tmp.flags = priv->flags; 872 tmp.baud_base = priv->baud_base; 873 tmp.custom_divisor = priv->custom_divisor; 874 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 875 return -EFAULT; 876 return 0; 877 } /* get_serial_info */ 878 879 880 static int set_serial_info(struct usb_serial_port * port, struct serial_struct __user * newinfo) 881 { /* set_serial_info */ 882 struct ftdi_private *priv = usb_get_serial_port_data(port); 883 struct serial_struct new_serial; 884 struct ftdi_private old_priv; 885 886 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 887 return -EFAULT; 888 old_priv = * priv; 889 890 /* Do error checking and permission checking */ 891 892 if (!capable(CAP_SYS_ADMIN)) { 893 if (((new_serial.flags & ~ASYNC_USR_MASK) != 894 (priv->flags & ~ASYNC_USR_MASK))) 895 return -EPERM; 896 priv->flags = ((priv->flags & ~ASYNC_USR_MASK) | 897 (new_serial.flags & ASYNC_USR_MASK)); 898 priv->custom_divisor = new_serial.custom_divisor; 899 goto check_and_exit; 900 } 901 902 if ((new_serial.baud_base != priv->baud_base) && 903 (new_serial.baud_base < 9600)) 904 return -EINVAL; 905 906 /* Make the changes - these are privileged changes! */ 907 908 priv->flags = ((priv->flags & ~ASYNC_FLAGS) | 909 (new_serial.flags & ASYNC_FLAGS)); 910 priv->custom_divisor = new_serial.custom_divisor; 911 912 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0; 913 914 check_and_exit: 915 if ((old_priv.flags & ASYNC_SPD_MASK) != 916 (priv->flags & ASYNC_SPD_MASK)) { 917 if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) 918 port->tty->alt_speed = 57600; 919 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) 920 port->tty->alt_speed = 115200; 921 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) 922 port->tty->alt_speed = 230400; 923 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) 924 port->tty->alt_speed = 460800; 925 else 926 port->tty->alt_speed = 0; 927 } 928 if (((old_priv.flags & ASYNC_SPD_MASK) != 929 (priv->flags & ASYNC_SPD_MASK)) || 930 (((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) && 931 (old_priv.custom_divisor != priv->custom_divisor))) { 932 change_speed(port); 933 } 934 935 return (0); 936 937 } /* set_serial_info */ 938 939 940 /* Determine type of FTDI chip based on USB config and descriptor. */ 941 static void ftdi_determine_type(struct usb_serial_port *port) 942 { 943 struct ftdi_private *priv = usb_get_serial_port_data(port); 944 struct usb_serial *serial = port->serial; 945 struct usb_device *udev = serial->dev; 946 unsigned version; 947 unsigned interfaces; 948 949 /* Assume it is not the original SIO device for now. */ 950 priv->baud_base = 48000000 / 2; 951 priv->write_offset = 0; 952 953 version = le16_to_cpu(udev->descriptor.bcdDevice); 954 interfaces = udev->actconfig->desc.bNumInterfaces; 955 dbg("%s: bcdDevice = 0x%x, bNumInterfaces = %u", __FUNCTION__, 956 version, interfaces); 957 if (interfaces > 1) { 958 int inter; 959 960 /* Multiple interfaces. Assume FT2232C. */ 961 priv->chip_type = FT2232C; 962 /* Determine interface code. */ 963 inter = serial->interface->altsetting->desc.bInterfaceNumber; 964 if (inter == 0) { 965 priv->interface = PIT_SIOA; 966 } else { 967 priv->interface = PIT_SIOB; 968 } 969 /* BM-type devices have a bug where bcdDevice gets set 970 * to 0x200 when iSerialNumber is 0. */ 971 if (version < 0x500) { 972 dbg("%s: something fishy - bcdDevice too low for multi-interface device", 973 __FUNCTION__); 974 } 975 } else if (version < 0x200) { 976 /* Old device. Assume its the original SIO. */ 977 priv->chip_type = SIO; 978 priv->baud_base = 12000000 / 16; 979 priv->write_offset = 1; 980 } else if (version < 0x400) { 981 /* Assume its an FT8U232AM (or FT8U245AM) */ 982 /* (It might be a BM because of the iSerialNumber bug, 983 * but it will still work as an AM device.) */ 984 priv->chip_type = FT8U232AM; 985 } else { 986 /* Assume its an FT232BM (or FT245BM) */ 987 priv->chip_type = FT232BM; 988 } 989 info("Detected %s", ftdi_chip_name[priv->chip_type]); 990 } 991 992 993 /* 994 * *************************************************************************** 995 * Sysfs Attribute 996 * *************************************************************************** 997 */ 998 999 static ssize_t show_latency_timer(struct device *dev, struct device_attribute *attr, char *buf) 1000 { 1001 struct usb_serial_port *port = to_usb_serial_port(dev); 1002 struct ftdi_private *priv = usb_get_serial_port_data(port); 1003 struct usb_device *udev; 1004 unsigned short latency = 0; 1005 int rv = 0; 1006 1007 udev = to_usb_device(dev); 1008 1009 dbg("%s",__FUNCTION__); 1010 1011 rv = usb_control_msg(udev, 1012 usb_rcvctrlpipe(udev, 0), 1013 FTDI_SIO_GET_LATENCY_TIMER_REQUEST, 1014 FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE, 1015 0, priv->interface, 1016 (char*) &latency, 1, WDR_TIMEOUT); 1017 1018 if (rv < 0) { 1019 dev_err(dev, "Unable to read latency timer: %i", rv); 1020 return -EIO; 1021 } 1022 return sprintf(buf, "%i\n", latency); 1023 } 1024 1025 /* Write a new value of the latency timer, in units of milliseconds. */ 1026 static ssize_t store_latency_timer(struct device *dev, struct device_attribute *attr, const char *valbuf, 1027 size_t count) 1028 { 1029 struct usb_serial_port *port = to_usb_serial_port(dev); 1030 struct ftdi_private *priv = usb_get_serial_port_data(port); 1031 struct usb_device *udev; 1032 char buf[1]; 1033 int v = simple_strtoul(valbuf, NULL, 10); 1034 int rv = 0; 1035 1036 udev = to_usb_device(dev); 1037 1038 dbg("%s: setting latency timer = %i", __FUNCTION__, v); 1039 1040 rv = usb_control_msg(udev, 1041 usb_sndctrlpipe(udev, 0), 1042 FTDI_SIO_SET_LATENCY_TIMER_REQUEST, 1043 FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE, 1044 v, priv->interface, 1045 buf, 0, WDR_TIMEOUT); 1046 1047 if (rv < 0) { 1048 dev_err(dev, "Unable to write latency timer: %i", rv); 1049 return -EIO; 1050 } 1051 1052 return count; 1053 } 1054 1055 /* Write an event character directly to the FTDI register. The ASCII 1056 value is in the low 8 bits, with the enable bit in the 9th bit. */ 1057 static ssize_t store_event_char(struct device *dev, struct device_attribute *attr, const char *valbuf, 1058 size_t count) 1059 { 1060 struct usb_serial_port *port = to_usb_serial_port(dev); 1061 struct ftdi_private *priv = usb_get_serial_port_data(port); 1062 struct usb_device *udev; 1063 char buf[1]; 1064 int v = simple_strtoul(valbuf, NULL, 10); 1065 int rv = 0; 1066 1067 udev = to_usb_device(dev); 1068 1069 dbg("%s: setting event char = %i", __FUNCTION__, v); 1070 1071 rv = usb_control_msg(udev, 1072 usb_sndctrlpipe(udev, 0), 1073 FTDI_SIO_SET_EVENT_CHAR_REQUEST, 1074 FTDI_SIO_SET_EVENT_CHAR_REQUEST_TYPE, 1075 v, priv->interface, 1076 buf, 0, WDR_TIMEOUT); 1077 1078 if (rv < 0) { 1079 dbg("Unable to write event character: %i", rv); 1080 return -EIO; 1081 } 1082 1083 return count; 1084 } 1085 1086 static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer, store_latency_timer); 1087 static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char); 1088 1089 static void create_sysfs_attrs(struct usb_serial *serial) 1090 { 1091 struct ftdi_private *priv; 1092 struct usb_device *udev; 1093 1094 dbg("%s",__FUNCTION__); 1095 1096 priv = usb_get_serial_port_data(serial->port[0]); 1097 udev = serial->dev; 1098 1099 /* XXX I've no idea if the original SIO supports the event_char 1100 * sysfs parameter, so I'm playing it safe. */ 1101 if (priv->chip_type != SIO) { 1102 dbg("sysfs attributes for %s", ftdi_chip_name[priv->chip_type]); 1103 device_create_file(&udev->dev, &dev_attr_event_char); 1104 if (priv->chip_type == FT232BM || priv->chip_type == FT2232C) { 1105 device_create_file(&udev->dev, &dev_attr_latency_timer); 1106 } 1107 } 1108 } 1109 1110 static void remove_sysfs_attrs(struct usb_serial *serial) 1111 { 1112 struct ftdi_private *priv; 1113 struct usb_device *udev; 1114 1115 dbg("%s",__FUNCTION__); 1116 1117 priv = usb_get_serial_port_data(serial->port[0]); 1118 udev = serial->dev; 1119 1120 /* XXX see create_sysfs_attrs */ 1121 if (priv->chip_type != SIO) { 1122 device_remove_file(&udev->dev, &dev_attr_event_char); 1123 if (priv->chip_type == FT232BM || priv->chip_type == FT2232C) { 1124 device_remove_file(&udev->dev, &dev_attr_latency_timer); 1125 } 1126 } 1127 1128 } 1129 1130 /* 1131 * *************************************************************************** 1132 * FTDI driver specific functions 1133 * *************************************************************************** 1134 */ 1135 1136 /* Probe function to check for special devices */ 1137 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id) 1138 { 1139 usb_set_serial_data(serial, (void *)id->driver_info); 1140 1141 return (0); 1142 } 1143 1144 /* attach subroutine */ 1145 static int ftdi_sio_attach (struct usb_serial *serial) 1146 { 1147 struct usb_serial_port *port = serial->port[0]; 1148 struct ftdi_private *priv; 1149 struct ftdi_sio_quirk *quirk; 1150 1151 dbg("%s",__FUNCTION__); 1152 1153 priv = kzalloc(sizeof(struct ftdi_private), GFP_KERNEL); 1154 if (!priv){ 1155 err("%s- kmalloc(%Zd) failed.", __FUNCTION__, sizeof(struct ftdi_private)); 1156 return -ENOMEM; 1157 } 1158 1159 spin_lock_init(&priv->rx_lock); 1160 init_waitqueue_head(&priv->delta_msr_wait); 1161 /* This will push the characters through immediately rather 1162 than queue a task to deliver them */ 1163 priv->flags = ASYNC_LOW_LATENCY; 1164 1165 /* Increase the size of read buffers */ 1166 kfree(port->bulk_in_buffer); 1167 port->bulk_in_buffer = kmalloc (BUFSZ, GFP_KERNEL); 1168 if (!port->bulk_in_buffer) { 1169 kfree (priv); 1170 return -ENOMEM; 1171 } 1172 if (port->read_urb) { 1173 port->read_urb->transfer_buffer = port->bulk_in_buffer; 1174 port->read_urb->transfer_buffer_length = BUFSZ; 1175 } 1176 1177 INIT_WORK(&priv->rx_work, ftdi_process_read, port); 1178 1179 /* Free port's existing write urb and transfer buffer. */ 1180 if (port->write_urb) { 1181 usb_free_urb (port->write_urb); 1182 port->write_urb = NULL; 1183 } 1184 kfree(port->bulk_out_buffer); 1185 port->bulk_out_buffer = NULL; 1186 1187 usb_set_serial_port_data(serial->port[0], priv); 1188 1189 ftdi_determine_type (serial->port[0]); 1190 create_sysfs_attrs(serial); 1191 1192 /* Check for device requiring special set up. */ 1193 quirk = (struct ftdi_sio_quirk *)usb_get_serial_data(serial); 1194 if (quirk && quirk->setup) { 1195 quirk->setup(serial); 1196 } 1197 1198 return (0); 1199 } /* ftdi_sio_attach */ 1200 1201 1202 /* Setup for the USB-UIRT device, which requires hardwired 1203 * baudrate (38400 gets mapped to 312500) */ 1204 /* Called from usbserial:serial_probe */ 1205 static void ftdi_USB_UIRT_setup (struct usb_serial *serial) 1206 { 1207 struct ftdi_private *priv; 1208 1209 dbg("%s",__FUNCTION__); 1210 1211 priv = usb_get_serial_port_data(serial->port[0]); 1212 priv->flags |= ASYNC_SPD_CUST; 1213 priv->custom_divisor = 77; 1214 priv->force_baud = B38400; 1215 } /* ftdi_USB_UIRT_setup */ 1216 1217 /* Setup for the HE-TIRA1 device, which requires hardwired 1218 * baudrate (38400 gets mapped to 100000) and RTS-CTS enabled. */ 1219 static void ftdi_HE_TIRA1_setup (struct usb_serial *serial) 1220 { 1221 struct ftdi_private *priv; 1222 1223 dbg("%s",__FUNCTION__); 1224 1225 priv = usb_get_serial_port_data(serial->port[0]); 1226 priv->flags |= ASYNC_SPD_CUST; 1227 priv->custom_divisor = 240; 1228 priv->force_baud = B38400; 1229 priv->force_rtscts = 1; 1230 } /* ftdi_HE_TIRA1_setup */ 1231 1232 1233 /* ftdi_shutdown is called from usbserial:usb_serial_disconnect 1234 * it is called when the usb device is disconnected 1235 * 1236 * usbserial:usb_serial_disconnect 1237 * calls __serial_close for each open of the port 1238 * shutdown is called then (ie ftdi_shutdown) 1239 */ 1240 1241 1242 static void ftdi_shutdown (struct usb_serial *serial) 1243 { /* ftdi_shutdown */ 1244 1245 struct usb_serial_port *port = serial->port[0]; 1246 struct ftdi_private *priv = usb_get_serial_port_data(port); 1247 1248 dbg("%s", __FUNCTION__); 1249 1250 remove_sysfs_attrs(serial); 1251 1252 /* all open ports are closed at this point 1253 * (by usbserial.c:__serial_close, which calls ftdi_close) 1254 */ 1255 1256 if (priv) { 1257 usb_set_serial_port_data(port, NULL); 1258 kfree(priv); 1259 } 1260 } /* ftdi_shutdown */ 1261 1262 1263 static int ftdi_open (struct usb_serial_port *port, struct file *filp) 1264 { /* ftdi_open */ 1265 struct usb_device *dev = port->serial->dev; 1266 struct ftdi_private *priv = usb_get_serial_port_data(port); 1267 unsigned long flags; 1268 1269 int result = 0; 1270 char buf[1]; /* Needed for the usb_control_msg I think */ 1271 1272 dbg("%s", __FUNCTION__); 1273 1274 if (port->tty) 1275 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0; 1276 1277 /* No error checking for this (will get errors later anyway) */ 1278 /* See ftdi_sio.h for description of what is reset */ 1279 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 1280 FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE, 1281 FTDI_SIO_RESET_SIO, 1282 priv->interface, buf, 0, WDR_TIMEOUT); 1283 1284 /* Termios defaults are set by usb_serial_init. We don't change 1285 port->tty->termios - this would loose speed settings, etc. 1286 This is same behaviour as serial.c/rs_open() - Kuba */ 1287 1288 /* ftdi_set_termios will send usb control messages */ 1289 if (port->tty) 1290 ftdi_set_termios(port, NULL); 1291 1292 /* FIXME: Flow control might be enabled, so it should be checked - 1293 we have no control of defaults! */ 1294 /* Turn on RTS and DTR since we are not flow controlling by default */ 1295 set_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1296 1297 /* Not throttled */ 1298 spin_lock_irqsave(&priv->rx_lock, flags); 1299 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 1300 spin_unlock_irqrestore(&priv->rx_lock, flags); 1301 1302 /* Start reading from the device */ 1303 priv->rx_processed = 0; 1304 usb_fill_bulk_urb(port->read_urb, dev, 1305 usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress), 1306 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, 1307 ftdi_read_bulk_callback, port); 1308 result = usb_submit_urb(port->read_urb, GFP_KERNEL); 1309 if (result) 1310 err("%s - failed submitting read urb, error %d", __FUNCTION__, result); 1311 1312 1313 return result; 1314 } /* ftdi_open */ 1315 1316 1317 1318 /* 1319 * usbserial:__serial_close only calls ftdi_close if the point is open 1320 * 1321 * This only gets called when it is the last close 1322 * 1323 * 1324 */ 1325 1326 static void ftdi_close (struct usb_serial_port *port, struct file *filp) 1327 { /* ftdi_close */ 1328 unsigned int c_cflag = port->tty->termios->c_cflag; 1329 struct ftdi_private *priv = usb_get_serial_port_data(port); 1330 char buf[1]; 1331 1332 dbg("%s", __FUNCTION__); 1333 1334 if (c_cflag & HUPCL){ 1335 /* Disable flow control */ 1336 if (usb_control_msg(port->serial->dev, 1337 usb_sndctrlpipe(port->serial->dev, 0), 1338 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1339 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1340 0, priv->interface, buf, 0, 1341 WDR_TIMEOUT) < 0) { 1342 err("error from flowcontrol urb"); 1343 } 1344 1345 /* drop RTS and DTR */ 1346 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1347 } /* Note change no line if hupcl is off */ 1348 1349 /* cancel any scheduled reading */ 1350 cancel_delayed_work(&priv->rx_work); 1351 flush_scheduled_work(); 1352 1353 /* shutdown our bulk read */ 1354 if (port->read_urb) 1355 usb_kill_urb(port->read_urb); 1356 } /* ftdi_close */ 1357 1358 1359 1360 /* The SIO requires the first byte to have: 1361 * B0 1 1362 * B1 0 1363 * B2..7 length of message excluding byte 0 1364 * 1365 * The new devices do not require this byte 1366 */ 1367 static int ftdi_write (struct usb_serial_port *port, 1368 const unsigned char *buf, int count) 1369 { /* ftdi_write */ 1370 struct ftdi_private *priv = usb_get_serial_port_data(port); 1371 struct urb *urb; 1372 unsigned char *buffer; 1373 int data_offset ; /* will be 1 for the SIO and 0 otherwise */ 1374 int status; 1375 int transfer_size; 1376 1377 dbg("%s port %d, %d bytes", __FUNCTION__, port->number, count); 1378 1379 if (count == 0) { 1380 dbg("write request of 0 bytes"); 1381 return 0; 1382 } 1383 1384 data_offset = priv->write_offset; 1385 dbg("data_offset set to %d",data_offset); 1386 1387 /* Determine total transfer size */ 1388 transfer_size = count; 1389 if (data_offset > 0) { 1390 /* Original sio needs control bytes too... */ 1391 transfer_size += (data_offset * 1392 ((count + (PKTSZ - 1 - data_offset)) / 1393 (PKTSZ - data_offset))); 1394 } 1395 1396 buffer = kmalloc (transfer_size, GFP_ATOMIC); 1397 if (!buffer) { 1398 err("%s ran out of kernel memory for urb ...", __FUNCTION__); 1399 return -ENOMEM; 1400 } 1401 1402 urb = usb_alloc_urb(0, GFP_ATOMIC); 1403 if (!urb) { 1404 err("%s - no more free urbs", __FUNCTION__); 1405 kfree (buffer); 1406 return -ENOMEM; 1407 } 1408 1409 /* Copy data */ 1410 if (data_offset > 0) { 1411 /* Original sio requires control byte at start of each packet. */ 1412 int user_pktsz = PKTSZ - data_offset; 1413 int todo = count; 1414 unsigned char *first_byte = buffer; 1415 const unsigned char *current_position = buf; 1416 1417 while (todo > 0) { 1418 if (user_pktsz > todo) { 1419 user_pktsz = todo; 1420 } 1421 /* Write the control byte at the front of the packet*/ 1422 *first_byte = 1 | ((user_pktsz) << 2); 1423 /* Copy data for packet */ 1424 memcpy (first_byte + data_offset, 1425 current_position, user_pktsz); 1426 first_byte += user_pktsz + data_offset; 1427 current_position += user_pktsz; 1428 todo -= user_pktsz; 1429 } 1430 } else { 1431 /* No control byte required. */ 1432 /* Copy in the data to send */ 1433 memcpy (buffer, buf, count); 1434 } 1435 1436 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, buffer); 1437 1438 /* fill the buffer and send it */ 1439 usb_fill_bulk_urb(urb, port->serial->dev, 1440 usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress), 1441 buffer, transfer_size, 1442 ftdi_write_bulk_callback, port); 1443 1444 status = usb_submit_urb(urb, GFP_ATOMIC); 1445 if (status) { 1446 err("%s - failed submitting write urb, error %d", __FUNCTION__, status); 1447 count = status; 1448 kfree (buffer); 1449 } 1450 1451 /* we are done with this urb, so let the host driver 1452 * really free it when it is finished with it */ 1453 usb_free_urb (urb); 1454 1455 dbg("%s write returning: %d", __FUNCTION__, count); 1456 return count; 1457 } /* ftdi_write */ 1458 1459 1460 /* This function may get called when the device is closed */ 1461 1462 static void ftdi_write_bulk_callback (struct urb *urb, struct pt_regs *regs) 1463 { 1464 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1465 1466 /* free up the transfer buffer, as usb_free_urb() does not do this */ 1467 kfree (urb->transfer_buffer); 1468 1469 dbg("%s - port %d", __FUNCTION__, port->number); 1470 1471 if (urb->status) { 1472 dbg("nonzero write bulk status received: %d", urb->status); 1473 return; 1474 } 1475 1476 usb_serial_port_softint(port); 1477 } /* ftdi_write_bulk_callback */ 1478 1479 1480 static int ftdi_write_room( struct usb_serial_port *port ) 1481 { 1482 dbg("%s - port %d", __FUNCTION__, port->number); 1483 1484 /* 1485 * We really can take anything the user throws at us 1486 * but let's pick a nice big number to tell the tty 1487 * layer that we have lots of free space 1488 */ 1489 return 2048; 1490 } /* ftdi_write_room */ 1491 1492 1493 static int ftdi_chars_in_buffer (struct usb_serial_port *port) 1494 { /* ftdi_chars_in_buffer */ 1495 dbg("%s - port %d", __FUNCTION__, port->number); 1496 1497 /* 1498 * We can't really account for how much data we 1499 * have sent out, but hasn't made it through to the 1500 * device, so just tell the tty layer that everything 1501 * is flushed. 1502 */ 1503 return 0; 1504 } /* ftdi_chars_in_buffer */ 1505 1506 1507 1508 static void ftdi_read_bulk_callback (struct urb *urb, struct pt_regs *regs) 1509 { /* ftdi_read_bulk_callback */ 1510 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1511 struct tty_struct *tty; 1512 struct ftdi_private *priv; 1513 1514 if (urb->number_of_packets > 0) { 1515 err("%s transfer_buffer_length %d actual_length %d number of packets %d",__FUNCTION__, 1516 urb->transfer_buffer_length, urb->actual_length, urb->number_of_packets ); 1517 err("%s transfer_flags %x ", __FUNCTION__,urb->transfer_flags ); 1518 } 1519 1520 dbg("%s - port %d", __FUNCTION__, port->number); 1521 1522 if (port->open_count <= 0) 1523 return; 1524 1525 tty = port->tty; 1526 if (!tty) { 1527 dbg("%s - bad tty pointer - exiting",__FUNCTION__); 1528 return; 1529 } 1530 1531 priv = usb_get_serial_port_data(port); 1532 if (!priv) { 1533 dbg("%s - bad port private data pointer - exiting", __FUNCTION__); 1534 return; 1535 } 1536 1537 if (urb != port->read_urb) { 1538 err("%s - Not my urb!", __FUNCTION__); 1539 } 1540 1541 if (urb->status) { 1542 /* This will happen at close every time so it is a dbg not an err */ 1543 dbg("(this is ok on close) nonzero read bulk status received: %d", urb->status); 1544 return; 1545 } 1546 1547 ftdi_process_read(port); 1548 1549 } /* ftdi_read_bulk_callback */ 1550 1551 1552 static void ftdi_process_read (void *param) 1553 { /* ftdi_process_read */ 1554 struct usb_serial_port *port = (struct usb_serial_port*)param; 1555 struct urb *urb; 1556 struct tty_struct *tty; 1557 struct ftdi_private *priv; 1558 char error_flag; 1559 unsigned char *data; 1560 1561 int i; 1562 int result; 1563 int need_flip; 1564 int packet_offset; 1565 unsigned long flags; 1566 1567 dbg("%s - port %d", __FUNCTION__, port->number); 1568 1569 if (port->open_count <= 0) 1570 return; 1571 1572 tty = port->tty; 1573 if (!tty) { 1574 dbg("%s - bad tty pointer - exiting",__FUNCTION__); 1575 return; 1576 } 1577 1578 priv = usb_get_serial_port_data(port); 1579 if (!priv) { 1580 dbg("%s - bad port private data pointer - exiting", __FUNCTION__); 1581 return; 1582 } 1583 1584 urb = port->read_urb; 1585 if (!urb) { 1586 dbg("%s - bad read_urb pointer - exiting", __FUNCTION__); 1587 return; 1588 } 1589 1590 data = urb->transfer_buffer; 1591 1592 if (priv->rx_processed) { 1593 dbg("%s - already processed: %d bytes, %d remain", __FUNCTION__, 1594 priv->rx_processed, 1595 urb->actual_length - priv->rx_processed); 1596 } else { 1597 /* The first two bytes of every read packet are status */ 1598 if (urb->actual_length > 2) { 1599 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); 1600 } else { 1601 dbg("Status only: %03oo %03oo",data[0],data[1]); 1602 } 1603 } 1604 1605 1606 /* TO DO -- check for hung up line and handle appropriately: */ 1607 /* send hangup */ 1608 /* See acm.c - you do a tty_hangup - eg tty_hangup(tty) */ 1609 /* if CD is dropped and the line is not CLOCAL then we should hangup */ 1610 1611 need_flip = 0; 1612 for (packet_offset = priv->rx_processed; packet_offset < urb->actual_length; packet_offset += PKTSZ) { 1613 int length; 1614 1615 /* Compare new line status to the old one, signal if different */ 1616 /* N.B. packet may be processed more than once, but differences 1617 * are only processed once. */ 1618 if (priv != NULL) { 1619 char new_status = data[packet_offset+0] & FTDI_STATUS_B0_MASK; 1620 if (new_status != priv->prev_status) { 1621 priv->diff_status |= new_status ^ priv->prev_status; 1622 wake_up_interruptible(&priv->delta_msr_wait); 1623 priv->prev_status = new_status; 1624 } 1625 } 1626 1627 length = min(PKTSZ, urb->actual_length-packet_offset)-2; 1628 if (length < 0) { 1629 err("%s - bad packet length: %d", __FUNCTION__, length+2); 1630 length = 0; 1631 } 1632 1633 if (priv->rx_flags & THROTTLED) { 1634 dbg("%s - throttled", __FUNCTION__); 1635 break; 1636 } 1637 if (tty_buffer_request_room(tty, length) < length) { 1638 /* break out & wait for throttling/unthrottling to happen */ 1639 dbg("%s - receive room low", __FUNCTION__); 1640 break; 1641 } 1642 1643 /* Handle errors and break */ 1644 error_flag = TTY_NORMAL; 1645 /* Although the device uses a bitmask and hence can have multiple */ 1646 /* errors on a packet - the order here sets the priority the */ 1647 /* error is returned to the tty layer */ 1648 1649 if ( data[packet_offset+1] & FTDI_RS_OE ) { 1650 error_flag = TTY_OVERRUN; 1651 dbg("OVERRRUN error"); 1652 } 1653 if ( data[packet_offset+1] & FTDI_RS_BI ) { 1654 error_flag = TTY_BREAK; 1655 dbg("BREAK received"); 1656 } 1657 if ( data[packet_offset+1] & FTDI_RS_PE ) { 1658 error_flag = TTY_PARITY; 1659 dbg("PARITY error"); 1660 } 1661 if ( data[packet_offset+1] & FTDI_RS_FE ) { 1662 error_flag = TTY_FRAME; 1663 dbg("FRAMING error"); 1664 } 1665 if (length > 0) { 1666 for (i = 2; i < length+2; i++) { 1667 /* Note that the error flag is duplicated for 1668 every character received since we don't know 1669 which character it applied to */ 1670 tty_insert_flip_char(tty, data[packet_offset+i], error_flag); 1671 } 1672 need_flip = 1; 1673 } 1674 1675 #ifdef NOT_CORRECT_BUT_KEEPING_IT_FOR_NOW 1676 /* if a parity error is detected you get status packets forever 1677 until a character is sent without a parity error. 1678 This doesn't work well since the application receives a never 1679 ending stream of bad data - even though new data hasn't been sent. 1680 Therefore I (bill) have taken this out. 1681 However - this might make sense for framing errors and so on 1682 so I am leaving the code in for now. 1683 */ 1684 else { 1685 if (error_flag != TTY_NORMAL){ 1686 dbg("error_flag is not normal"); 1687 /* In this case it is just status - if that is an error send a bad character */ 1688 if(tty->flip.count >= TTY_FLIPBUF_SIZE) { 1689 tty_flip_buffer_push(tty); 1690 } 1691 tty_insert_flip_char(tty, 0xff, error_flag); 1692 need_flip = 1; 1693 } 1694 } 1695 #endif 1696 } /* "for(packet_offset=0..." */ 1697 1698 /* Low latency */ 1699 if (need_flip) { 1700 tty_flip_buffer_push(tty); 1701 } 1702 1703 if (packet_offset < urb->actual_length) { 1704 /* not completely processed - record progress */ 1705 priv->rx_processed = packet_offset; 1706 dbg("%s - incomplete, %d bytes processed, %d remain", 1707 __FUNCTION__, packet_offset, 1708 urb->actual_length - packet_offset); 1709 /* check if we were throttled while processing */ 1710 spin_lock_irqsave(&priv->rx_lock, flags); 1711 if (priv->rx_flags & THROTTLED) { 1712 priv->rx_flags |= ACTUALLY_THROTTLED; 1713 spin_unlock_irqrestore(&priv->rx_lock, flags); 1714 dbg("%s - deferring remainder until unthrottled", 1715 __FUNCTION__); 1716 return; 1717 } 1718 spin_unlock_irqrestore(&priv->rx_lock, flags); 1719 /* if the port is closed stop trying to read */ 1720 if (port->open_count > 0){ 1721 /* delay processing of remainder */ 1722 schedule_delayed_work(&priv->rx_work, 1); 1723 } else { 1724 dbg("%s - port is closed", __FUNCTION__); 1725 } 1726 return; 1727 } 1728 1729 /* urb is completely processed */ 1730 priv->rx_processed = 0; 1731 1732 /* if the port is closed stop trying to read */ 1733 if (port->open_count > 0){ 1734 /* Continue trying to always read */ 1735 usb_fill_bulk_urb(port->read_urb, port->serial->dev, 1736 usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress), 1737 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, 1738 ftdi_read_bulk_callback, port); 1739 1740 result = usb_submit_urb(port->read_urb, GFP_ATOMIC); 1741 if (result) 1742 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); 1743 } 1744 1745 return; 1746 } /* ftdi_process_read */ 1747 1748 1749 static void ftdi_break_ctl( struct usb_serial_port *port, int break_state ) 1750 { 1751 struct ftdi_private *priv = usb_get_serial_port_data(port); 1752 __u16 urb_value = 0; 1753 char buf[1]; 1754 1755 /* break_state = -1 to turn on break, and 0 to turn off break */ 1756 /* see drivers/char/tty_io.c to see it used */ 1757 /* last_set_data_urb_value NEVER has the break bit set in it */ 1758 1759 if (break_state) { 1760 urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK; 1761 } else { 1762 urb_value = priv->last_set_data_urb_value; 1763 } 1764 1765 1766 if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), 1767 FTDI_SIO_SET_DATA_REQUEST, 1768 FTDI_SIO_SET_DATA_REQUEST_TYPE, 1769 urb_value , priv->interface, 1770 buf, 0, WDR_TIMEOUT) < 0) { 1771 err("%s FAILED to enable/disable break state (state was %d)", __FUNCTION__,break_state); 1772 } 1773 1774 dbg("%s break state is %d - urb is %d", __FUNCTION__,break_state, urb_value); 1775 1776 } 1777 1778 1779 /* old_termios contains the original termios settings and tty->termios contains 1780 * the new setting to be used 1781 * WARNING: set_termios calls this with old_termios in kernel space 1782 */ 1783 1784 static void ftdi_set_termios (struct usb_serial_port *port, struct termios *old_termios) 1785 { /* ftdi_termios */ 1786 struct usb_device *dev = port->serial->dev; 1787 unsigned int cflag = port->tty->termios->c_cflag; 1788 struct ftdi_private *priv = usb_get_serial_port_data(port); 1789 __u16 urb_value; /* will hold the new flags */ 1790 char buf[1]; /* Perhaps I should dynamically alloc this? */ 1791 1792 // Added for xon/xoff support 1793 unsigned int iflag = port->tty->termios->c_iflag; 1794 unsigned char vstop; 1795 unsigned char vstart; 1796 1797 dbg("%s", __FUNCTION__); 1798 1799 /* Force baud rate if this device requires it, unless it is set to B0. */ 1800 if (priv->force_baud && ((port->tty->termios->c_cflag & CBAUD) != B0)) { 1801 dbg("%s: forcing baud rate for this device", __FUNCTION__); 1802 port->tty->termios->c_cflag &= ~CBAUD; 1803 port->tty->termios->c_cflag |= priv->force_baud; 1804 } 1805 1806 /* Force RTS-CTS if this device requires it. */ 1807 if (priv->force_rtscts) { 1808 dbg("%s: forcing rtscts for this device", __FUNCTION__); 1809 port->tty->termios->c_cflag |= CRTSCTS; 1810 } 1811 1812 cflag = port->tty->termios->c_cflag; 1813 1814 /* FIXME -For this cut I don't care if the line is really changing or 1815 not - so just do the change regardless - should be able to 1816 compare old_termios and tty->termios */ 1817 /* NOTE These routines can get interrupted by 1818 ftdi_sio_read_bulk_callback - need to examine what this 1819 means - don't see any problems yet */ 1820 1821 /* Set number of data bits, parity, stop bits */ 1822 1823 urb_value = 0; 1824 urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 : 1825 FTDI_SIO_SET_DATA_STOP_BITS_1); 1826 urb_value |= (cflag & PARENB ? 1827 (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD : 1828 FTDI_SIO_SET_DATA_PARITY_EVEN) : 1829 FTDI_SIO_SET_DATA_PARITY_NONE); 1830 if (cflag & CSIZE) { 1831 switch (cflag & CSIZE) { 1832 case CS5: urb_value |= 5; dbg("Setting CS5"); break; 1833 case CS6: urb_value |= 6; dbg("Setting CS6"); break; 1834 case CS7: urb_value |= 7; dbg("Setting CS7"); break; 1835 case CS8: urb_value |= 8; dbg("Setting CS8"); break; 1836 default: 1837 err("CSIZE was set but not CS5-CS8"); 1838 } 1839 } 1840 1841 /* This is needed by the break command since it uses the same command - but is 1842 * or'ed with this value */ 1843 priv->last_set_data_urb_value = urb_value; 1844 1845 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 1846 FTDI_SIO_SET_DATA_REQUEST, 1847 FTDI_SIO_SET_DATA_REQUEST_TYPE, 1848 urb_value , priv->interface, 1849 buf, 0, WDR_SHORT_TIMEOUT) < 0) { 1850 err("%s FAILED to set databits/stopbits/parity", __FUNCTION__); 1851 } 1852 1853 /* Now do the baudrate */ 1854 if ((cflag & CBAUD) == B0 ) { 1855 /* Disable flow control */ 1856 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 1857 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1858 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1859 0, priv->interface, 1860 buf, 0, WDR_TIMEOUT) < 0) { 1861 err("%s error from disable flowcontrol urb", __FUNCTION__); 1862 } 1863 /* Drop RTS and DTR */ 1864 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1865 } else { 1866 /* set the baudrate determined before */ 1867 if (change_speed(port)) { 1868 err("%s urb failed to set baudrate", __FUNCTION__); 1869 } 1870 /* Ensure RTS and DTR are raised when baudrate changed from 0 */ 1871 if (!old_termios || (old_termios->c_cflag & CBAUD) == B0) { 1872 set_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1873 } 1874 } 1875 1876 /* Set flow control */ 1877 /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */ 1878 if (cflag & CRTSCTS) { 1879 dbg("%s Setting to CRTSCTS flow control", __FUNCTION__); 1880 if (usb_control_msg(dev, 1881 usb_sndctrlpipe(dev, 0), 1882 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1883 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1884 0 , (FTDI_SIO_RTS_CTS_HS | priv->interface), 1885 buf, 0, WDR_TIMEOUT) < 0) { 1886 err("urb failed to set to rts/cts flow control"); 1887 } 1888 1889 } else { 1890 /* 1891 * Xon/Xoff code 1892 * 1893 * Check the IXOFF status in the iflag component of the termios structure 1894 * if IXOFF is not set, the pre-xon/xoff code is executed. 1895 */ 1896 if (iflag & IXOFF) { 1897 dbg("%s request to enable xonxoff iflag=%04x",__FUNCTION__,iflag); 1898 // Try to enable the XON/XOFF on the ftdi_sio 1899 // Set the vstart and vstop -- could have been done up above where 1900 // a lot of other dereferencing is done but that would be very 1901 // inefficient as vstart and vstop are not always needed 1902 vstart=port->tty->termios->c_cc[VSTART]; 1903 vstop=port->tty->termios->c_cc[VSTOP]; 1904 urb_value=(vstop << 8) | (vstart); 1905 1906 if (usb_control_msg(dev, 1907 usb_sndctrlpipe(dev, 0), 1908 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1909 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1910 urb_value , (FTDI_SIO_XON_XOFF_HS 1911 | priv->interface), 1912 buf, 0, WDR_TIMEOUT) < 0) { 1913 err("urb failed to set to xon/xoff flow control"); 1914 } 1915 } else { 1916 /* else clause to only run if cfag ! CRTSCTS and iflag ! XOFF */ 1917 /* CHECKME Assuming XON/XOFF handled by tty stack - not by device */ 1918 dbg("%s Turning off hardware flow control", __FUNCTION__); 1919 if (usb_control_msg(dev, 1920 usb_sndctrlpipe(dev, 0), 1921 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1922 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1923 0, priv->interface, 1924 buf, 0, WDR_TIMEOUT) < 0) { 1925 err("urb failed to clear flow control"); 1926 } 1927 } 1928 1929 } 1930 return; 1931 } /* ftdi_termios */ 1932 1933 1934 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file) 1935 { 1936 struct ftdi_private *priv = usb_get_serial_port_data(port); 1937 unsigned char buf[2]; 1938 int ret; 1939 1940 dbg("%s TIOCMGET", __FUNCTION__); 1941 switch (priv->chip_type) { 1942 case SIO: 1943 /* Request the status from the device */ 1944 if ((ret = usb_control_msg(port->serial->dev, 1945 usb_rcvctrlpipe(port->serial->dev, 0), 1946 FTDI_SIO_GET_MODEM_STATUS_REQUEST, 1947 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE, 1948 0, 0, 1949 buf, 1, WDR_TIMEOUT)) < 0 ) { 1950 err("%s Could not get modem status of device - err: %d", __FUNCTION__, 1951 ret); 1952 return(ret); 1953 } 1954 break; 1955 case FT8U232AM: 1956 case FT232BM: 1957 case FT2232C: 1958 /* the 8U232AM returns a two byte value (the sio is a 1 byte value) - in the same 1959 format as the data returned from the in point */ 1960 if ((ret = usb_control_msg(port->serial->dev, 1961 usb_rcvctrlpipe(port->serial->dev, 0), 1962 FTDI_SIO_GET_MODEM_STATUS_REQUEST, 1963 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE, 1964 0, priv->interface, 1965 buf, 2, WDR_TIMEOUT)) < 0 ) { 1966 err("%s Could not get modem status of device - err: %d", __FUNCTION__, 1967 ret); 1968 return(ret); 1969 } 1970 break; 1971 default: 1972 return -EFAULT; 1973 break; 1974 } 1975 1976 return (buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) | 1977 (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) | 1978 (buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) | 1979 (buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0) | 1980 priv->last_dtr_rts; 1981 } 1982 1983 static int ftdi_tiocmset(struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear) 1984 { 1985 dbg("%s TIOCMSET", __FUNCTION__); 1986 return update_mctrl(port, set, clear); 1987 } 1988 1989 1990 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) 1991 { 1992 struct ftdi_private *priv = usb_get_serial_port_data(port); 1993 1994 dbg("%s cmd 0x%04x", __FUNCTION__, cmd); 1995 1996 /* Based on code from acm.c and others */ 1997 switch (cmd) { 1998 1999 case TIOCGSERIAL: /* gets serial port data */ 2000 return get_serial_info(port, (struct serial_struct __user *) arg); 2001 2002 case TIOCSSERIAL: /* sets serial port data */ 2003 return set_serial_info(port, (struct serial_struct __user *) arg); 2004 2005 /* 2006 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 2007 * - mask passed in arg for lines of interest 2008 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 2009 * Caller should use TIOCGICOUNT to see which one it was. 2010 * 2011 * This code is borrowed from linux/drivers/char/serial.c 2012 */ 2013 case TIOCMIWAIT: 2014 while (priv != NULL) { 2015 interruptible_sleep_on(&priv->delta_msr_wait); 2016 /* see if a signal did it */ 2017 if (signal_pending(current)) 2018 return -ERESTARTSYS; 2019 else { 2020 char diff = priv->diff_status; 2021 2022 if (diff == 0) { 2023 return -EIO; /* no change => error */ 2024 } 2025 2026 /* Consume all events */ 2027 priv->diff_status = 0; 2028 2029 /* Return 0 if caller wanted to know about these bits */ 2030 if ( ((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) || 2031 ((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) || 2032 ((arg & TIOCM_CD) && (diff & FTDI_RS0_RLSD)) || 2033 ((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS)) ) { 2034 return 0; 2035 } 2036 /* 2037 * Otherwise caller can't care less about what happened, 2038 * and so we continue to wait for more events. 2039 */ 2040 } 2041 } 2042 return(0); 2043 break; 2044 default: 2045 break; 2046 2047 } 2048 2049 2050 /* This is not necessarily an error - turns out the higher layers will do 2051 * some ioctls itself (see comment above) 2052 */ 2053 dbg("%s arg not supported - it was 0x%04x - check /usr/include/asm/ioctls.h", __FUNCTION__, cmd); 2054 2055 return(-ENOIOCTLCMD); 2056 } /* ftdi_ioctl */ 2057 2058 2059 static void ftdi_throttle (struct usb_serial_port *port) 2060 { 2061 struct ftdi_private *priv = usb_get_serial_port_data(port); 2062 unsigned long flags; 2063 2064 dbg("%s - port %d", __FUNCTION__, port->number); 2065 2066 spin_lock_irqsave(&priv->rx_lock, flags); 2067 priv->rx_flags |= THROTTLED; 2068 spin_unlock_irqrestore(&priv->rx_lock, flags); 2069 } 2070 2071 2072 static void ftdi_unthrottle (struct usb_serial_port *port) 2073 { 2074 struct ftdi_private *priv = usb_get_serial_port_data(port); 2075 int actually_throttled; 2076 unsigned long flags; 2077 2078 dbg("%s - port %d", __FUNCTION__, port->number); 2079 2080 spin_lock_irqsave(&priv->rx_lock, flags); 2081 actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; 2082 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 2083 spin_unlock_irqrestore(&priv->rx_lock, flags); 2084 2085 if (actually_throttled) 2086 schedule_work(&priv->rx_work); 2087 } 2088 2089 static int __init ftdi_init (void) 2090 { 2091 int retval; 2092 2093 dbg("%s", __FUNCTION__); 2094 if (vendor > 0 && product > 0) { 2095 /* Add user specified VID/PID to reserved element of table. */ 2096 int i; 2097 for (i = 0; id_table_combined[i].idVendor; i++) 2098 ; 2099 id_table_combined[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 2100 id_table_combined[i].idVendor = vendor; 2101 id_table_combined[i].idProduct = product; 2102 } 2103 retval = usb_serial_register(&ftdi_sio_device); 2104 if (retval) 2105 goto failed_sio_register; 2106 retval = usb_register(&ftdi_driver); 2107 if (retval) 2108 goto failed_usb_register; 2109 2110 info(DRIVER_VERSION ":" DRIVER_DESC); 2111 return 0; 2112 failed_usb_register: 2113 usb_serial_deregister(&ftdi_sio_device); 2114 failed_sio_register: 2115 return retval; 2116 } 2117 2118 2119 static void __exit ftdi_exit (void) 2120 { 2121 2122 dbg("%s", __FUNCTION__); 2123 2124 usb_deregister (&ftdi_driver); 2125 usb_serial_deregister (&ftdi_sio_device); 2126 2127 } 2128 2129 2130 module_init(ftdi_init); 2131 module_exit(ftdi_exit); 2132 2133 MODULE_AUTHOR( DRIVER_AUTHOR ); 2134 MODULE_DESCRIPTION( DRIVER_DESC ); 2135 MODULE_LICENSE("GPL"); 2136 2137 module_param(debug, bool, S_IRUGO | S_IWUSR); 2138 MODULE_PARM_DESC(debug, "Debug enabled or not"); 2139 module_param(vendor, ushort, 0); 2140 MODULE_PARM_DESC(vendor, "User specified vendor ID (default=" 2141 __MODULE_STRING(FTDI_VID)")"); 2142 module_param(product, ushort, 0); 2143 MODULE_PARM_DESC(vendor, "User specified product ID"); 2144 2145