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_IRTRANS_PID) }, 311 { USB_DEVICE(FTDI_VID, FTDI_IPLUS_PID) }, 312 { USB_DEVICE(FTDI_VID, FTDI_SIO_PID) }, 313 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID) }, 314 { USB_DEVICE(FTDI_VID, FTDI_8U232AM_ALT_PID) }, 315 { USB_DEVICE(FTDI_VID, FTDI_8U2232C_PID) }, 316 { USB_DEVICE(FTDI_VID, FTDI_RELAIS_PID) }, 317 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_IOBOARD_PID) }, 318 { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_MINI_IOBOARD_PID) }, 319 { USB_DEVICE(FTDI_VID, FTDI_XF_632_PID) }, 320 { USB_DEVICE(FTDI_VID, FTDI_XF_634_PID) }, 321 { USB_DEVICE(FTDI_VID, FTDI_XF_547_PID) }, 322 { USB_DEVICE(FTDI_VID, FTDI_XF_633_PID) }, 323 { USB_DEVICE(FTDI_VID, FTDI_XF_631_PID) }, 324 { USB_DEVICE(FTDI_VID, FTDI_XF_635_PID) }, 325 { USB_DEVICE(FTDI_VID, FTDI_XF_640_PID) }, 326 { USB_DEVICE(FTDI_VID, FTDI_XF_642_PID) }, 327 { USB_DEVICE(FTDI_VID, FTDI_DSS20_PID) }, 328 { USB_DEVICE(FTDI_NF_RIC_VID, FTDI_NF_RIC_PID) }, 329 { USB_DEVICE(FTDI_VID, FTDI_VNHCPCUSB_D_PID) }, 330 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_0_PID) }, 331 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_1_PID) }, 332 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_2_PID) }, 333 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_3_PID) }, 334 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_4_PID) }, 335 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_5_PID) }, 336 { USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) }, 337 { USB_DEVICE(FTDI_VID, FTDI_PERLE_ULTRAPORT_PID) }, 338 { USB_DEVICE(FTDI_VID, FTDI_PIEGROUP_PID) }, 339 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2101_PID) }, 340 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2102_PID) }, 341 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2103_PID) }, 342 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2104_PID) }, 343 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_1_PID) }, 344 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_2_PID) }, 345 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_1_PID) }, 346 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_2_PID) }, 347 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_1_PID) }, 348 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_2_PID) }, 349 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_1_PID) }, 350 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_2_PID) }, 351 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_3_PID) }, 352 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_4_PID) }, 353 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_1_PID) }, 354 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_2_PID) }, 355 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_3_PID) }, 356 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_4_PID) }, 357 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_1_PID) }, 358 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_2_PID) }, 359 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_3_PID) }, 360 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_4_PID) }, 361 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_1_PID) }, 362 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_2_PID) }, 363 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_3_PID) }, 364 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_4_PID) }, 365 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_5_PID) }, 366 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_6_PID) }, 367 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_7_PID) }, 368 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_8_PID) }, 369 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_1_PID) }, 370 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_2_PID) }, 371 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_3_PID) }, 372 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_4_PID) }, 373 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_5_PID) }, 374 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_6_PID) }, 375 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_7_PID) }, 376 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_8_PID) }, 377 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_1_PID) }, 378 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_2_PID) }, 379 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_3_PID) }, 380 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_4_PID) }, 381 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_5_PID) }, 382 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_6_PID) }, 383 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_7_PID) }, 384 { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_8_PID) }, 385 { USB_DEVICE(IDTECH_VID, IDTECH_IDT1221U_PID) }, 386 { USB_DEVICE(OCT_VID, OCT_US101_PID) }, 387 { USB_DEVICE(FTDI_VID, FTDI_HE_TIRA1_PID), 388 .driver_info = (kernel_ulong_t)&ftdi_HE_TIRA1_quirk }, 389 { USB_DEVICE(FTDI_VID, FTDI_USB_UIRT_PID), 390 .driver_info = (kernel_ulong_t)&ftdi_USB_UIRT_quirk }, 391 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_1) }, 392 { USB_DEVICE(FTDI_VID, PROTEGO_R2X0) }, 393 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_3) }, 394 { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_4) }, 395 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E808_PID) }, 396 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E809_PID) }, 397 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80A_PID) }, 398 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80B_PID) }, 399 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80C_PID) }, 400 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80D_PID) }, 401 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80E_PID) }, 402 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80F_PID) }, 403 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E888_PID) }, 404 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E889_PID) }, 405 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88A_PID) }, 406 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88B_PID) }, 407 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88C_PID) }, 408 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88D_PID) }, 409 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88E_PID) }, 410 { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88F_PID) }, 411 { USB_DEVICE(FTDI_VID, FTDI_ELV_UO100_PID) }, 412 { USB_DEVICE(FTDI_VID, FTDI_ELV_UM100_PID) }, 413 { USB_DEVICE(FTDI_VID, FTDI_ELV_UR100_PID) }, 414 { USB_DEVICE(FTDI_VID, FTDI_ELV_ALC8500_PID) }, 415 { USB_DEVICE(FTDI_VID, FTDI_PYRAMID_PID) }, 416 { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1000PC_PID) }, 417 /* 418 * These will probably use user-space drivers. Uncomment them if 419 * you need them or use the user-specified vendor/product module 420 * parameters (see ftdi_sio.h for the numbers). Make a fuss if 421 * you think the driver should recognize any of them by default. 422 */ 423 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_CLI7000_PID) }, */ 424 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_PPS7330_PID) }, */ 425 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_TFM100_PID) }, */ 426 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UDF77_PID) }, */ 427 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UIO88_PID) }, */ 428 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UAD8_PID) }, */ 429 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_UDA7_PID) }, */ 430 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_USI2_PID) }, */ 431 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_T1100_PID) }, */ 432 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_PCD200_PID) }, */ 433 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_ULA200_PID) }, */ 434 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_CSI8_PID) }, */ 435 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1000DL_PID) }, */ 436 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_PCK100_PID) }, */ 437 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_RFP500_PID) }, */ 438 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_FS20SIG_PID) }, */ 439 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_WS300PC_PID) }, */ 440 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1300PC_PID) }, */ 441 /* { USB_DEVICE(FTDI_VID, FTDI_ELV_WS500_PID) }, */ 442 { USB_DEVICE(FTDI_VID, LINX_SDMUSBQSS_PID) }, 443 { USB_DEVICE(FTDI_VID, LINX_MASTERDEVEL2_PID) }, 444 { USB_DEVICE(FTDI_VID, LINX_FUTURE_0_PID) }, 445 { USB_DEVICE(FTDI_VID, LINX_FUTURE_1_PID) }, 446 { USB_DEVICE(FTDI_VID, LINX_FUTURE_2_PID) }, 447 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU20_0_PID) }, 448 { USB_DEVICE(FTDI_VID, FTDI_CCSICDU40_1_PID) }, 449 { USB_DEVICE(FTDI_VID, INSIDE_ACCESSO) }, 450 { USB_DEVICE(INTREPID_VID, INTREPID_VALUECAN_PID) }, 451 { USB_DEVICE(INTREPID_VID, INTREPID_NEOVI_PID) }, 452 { USB_DEVICE(FALCOM_VID, FALCOM_TWIST_PID) }, 453 { USB_DEVICE(FALCOM_VID, FALCOM_SAMBA_PID) }, 454 { USB_DEVICE(FTDI_VID, FTDI_SUUNTO_SPORTS_PID) }, 455 { USB_DEVICE(FTDI_VID, FTDI_RM_CANVIEW_PID) }, 456 { USB_DEVICE(BANDB_VID, BANDB_USOTL4_PID) }, 457 { USB_DEVICE(BANDB_VID, BANDB_USTL4_PID) }, 458 { USB_DEVICE(BANDB_VID, BANDB_USO9ML2_PID) }, 459 { USB_DEVICE(FTDI_VID, EVER_ECO_PRO_CDS) }, 460 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_0_PID) }, 461 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_1_PID) }, 462 { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_2_PID) }, 463 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_0_PID) }, 464 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_1_PID) }, 465 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_2_PID) }, 466 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_3_PID) }, 467 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_4_PID) }, 468 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_5_PID) }, 469 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_6_PID) }, 470 { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_7_PID) }, 471 { USB_DEVICE(MOBILITY_VID, MOBILITY_USB_SERIAL_PID) }, 472 { USB_DEVICE(FTDI_VID, FTDI_ACTIVE_ROBOTS_PID) }, 473 { USB_DEVICE(FTDI_VID, FTDI_MHAM_KW_PID) }, 474 { USB_DEVICE(FTDI_VID, FTDI_MHAM_YS_PID) }, 475 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y6_PID) }, 476 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y8_PID) }, 477 { USB_DEVICE(FTDI_VID, FTDI_MHAM_IC_PID) }, 478 { USB_DEVICE(FTDI_VID, FTDI_MHAM_DB9_PID) }, 479 { USB_DEVICE(FTDI_VID, FTDI_MHAM_RS232_PID) }, 480 { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y9_PID) }, 481 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_VCP_PID) }, 482 { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_D2XX_PID) }, 483 { USB_DEVICE(EVOLUTION_VID, EVOLUTION_ER1_PID) }, 484 { USB_DEVICE(FTDI_VID, FTDI_ARTEMIS_PID) }, 485 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16_PID) }, 486 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16C_PID) }, 487 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HR_PID) }, 488 { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HRC_PID) }, 489 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_B1_PID) }, 490 { USB_DEVICE(KOBIL_VID, KOBIL_CONV_KAAN_PID) }, 491 { USB_DEVICE(POSIFLEX_VID, POSIFLEX_PP7000_PID) }, 492 { USB_DEVICE(FTDI_VID, FTDI_TTUSB_PID) }, 493 { USB_DEVICE(FTDI_VID, FTDI_ECLO_COM_1WIRE_PID) }, 494 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_777_PID) }, 495 { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_8900F_PID) }, 496 { USB_DEVICE(FTDI_VID, FTDI_PCDJ_DAC2_PID) }, 497 { USB_DEVICE(FTDI_VID, FTDI_RRCIRKITS_LOCOBUFFER_PID) }, 498 { USB_DEVICE(FTDI_VID, FTDI_ASK_RDR400_PID) }, 499 { USB_DEVICE(ICOM_ID1_VID, ICOM_ID1_PID) }, 500 { USB_DEVICE(PAPOUCH_VID, PAPOUCH_TMU_PID) }, 501 { }, /* Optional parameter entry */ 502 { } /* Terminating entry */ 503 }; 504 505 MODULE_DEVICE_TABLE (usb, id_table_combined); 506 507 static struct usb_driver ftdi_driver = { 508 .name = "ftdi_sio", 509 .probe = usb_serial_probe, 510 .disconnect = usb_serial_disconnect, 511 .id_table = id_table_combined, 512 .no_dynamic_id = 1, 513 }; 514 515 static const char *ftdi_chip_name[] = { 516 [SIO] = "SIO", /* the serial part of FT8U100AX */ 517 [FT8U232AM] = "FT8U232AM", 518 [FT232BM] = "FT232BM", 519 [FT2232C] = "FT2232C", 520 }; 521 522 523 /* Constants for read urb and write urb */ 524 #define BUFSZ 512 525 #define PKTSZ 64 526 527 /* rx_flags */ 528 #define THROTTLED 0x01 529 #define ACTUALLY_THROTTLED 0x02 530 531 struct ftdi_private { 532 ftdi_chip_type_t chip_type; 533 /* type of the device, either SIO or FT8U232AM */ 534 int baud_base; /* baud base clock for divisor setting */ 535 int custom_divisor; /* custom_divisor kludge, this is for baud_base (different from what goes to the chip!) */ 536 __u16 last_set_data_urb_value ; 537 /* the last data state set - needed for doing a break */ 538 int write_offset; /* This is the offset in the usb data block to write the serial data - 539 * it is different between devices 540 */ 541 int flags; /* some ASYNC_xxxx flags are supported */ 542 unsigned long last_dtr_rts; /* saved modem control outputs */ 543 wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */ 544 char prev_status, diff_status; /* Used for TIOCMIWAIT */ 545 __u8 rx_flags; /* receive state flags (throttling) */ 546 spinlock_t rx_lock; /* spinlock for receive state */ 547 struct work_struct rx_work; 548 int rx_processed; 549 550 __u16 interface; /* FT2232C port interface (0 for FT232/245) */ 551 552 int force_baud; /* if non-zero, force the baud rate to this value */ 553 int force_rtscts; /* if non-zero, force RTS-CTS to always be enabled */ 554 }; 555 556 /* Used for TIOCMIWAIT */ 557 #define FTDI_STATUS_B0_MASK (FTDI_RS0_CTS | FTDI_RS0_DSR | FTDI_RS0_RI | FTDI_RS0_RLSD) 558 #define FTDI_STATUS_B1_MASK (FTDI_RS_BI) 559 /* End TIOCMIWAIT */ 560 561 #define FTDI_IMPL_ASYNC_FLAGS = ( ASYNC_SPD_HI | ASYNC_SPD_VHI \ 562 ASYNC_SPD_CUST | ASYNC_SPD_SHI | ASYNC_SPD_WARP ) 563 564 /* function prototypes for a FTDI serial converter */ 565 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id); 566 static int ftdi_sio_attach (struct usb_serial *serial); 567 static void ftdi_shutdown (struct usb_serial *serial); 568 static int ftdi_open (struct usb_serial_port *port, struct file *filp); 569 static void ftdi_close (struct usb_serial_port *port, struct file *filp); 570 static int ftdi_write (struct usb_serial_port *port, const unsigned char *buf, int count); 571 static int ftdi_write_room (struct usb_serial_port *port); 572 static int ftdi_chars_in_buffer (struct usb_serial_port *port); 573 static void ftdi_write_bulk_callback (struct urb *urb, struct pt_regs *regs); 574 static void ftdi_read_bulk_callback (struct urb *urb, struct pt_regs *regs); 575 static void ftdi_process_read (void *param); 576 static void ftdi_set_termios (struct usb_serial_port *port, struct termios * old); 577 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file); 578 static int ftdi_tiocmset (struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear); 579 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); 580 static void ftdi_break_ctl (struct usb_serial_port *port, int break_state ); 581 static void ftdi_throttle (struct usb_serial_port *port); 582 static void ftdi_unthrottle (struct usb_serial_port *port); 583 584 static unsigned short int ftdi_232am_baud_base_to_divisor (int baud, int base); 585 static unsigned short int ftdi_232am_baud_to_divisor (int baud); 586 static __u32 ftdi_232bm_baud_base_to_divisor (int baud, int base); 587 static __u32 ftdi_232bm_baud_to_divisor (int baud); 588 589 static struct usb_serial_driver ftdi_sio_device = { 590 .driver = { 591 .owner = THIS_MODULE, 592 .name = "ftdi_sio", 593 }, 594 .description = "FTDI USB Serial Device", 595 .id_table = id_table_combined, 596 .num_interrupt_in = 0, 597 .num_bulk_in = 1, 598 .num_bulk_out = 1, 599 .num_ports = 1, 600 .probe = ftdi_sio_probe, 601 .open = ftdi_open, 602 .close = ftdi_close, 603 .throttle = ftdi_throttle, 604 .unthrottle = ftdi_unthrottle, 605 .write = ftdi_write, 606 .write_room = ftdi_write_room, 607 .chars_in_buffer = ftdi_chars_in_buffer, 608 .read_bulk_callback = ftdi_read_bulk_callback, 609 .write_bulk_callback = ftdi_write_bulk_callback, 610 .tiocmget = ftdi_tiocmget, 611 .tiocmset = ftdi_tiocmset, 612 .ioctl = ftdi_ioctl, 613 .set_termios = ftdi_set_termios, 614 .break_ctl = ftdi_break_ctl, 615 .attach = ftdi_sio_attach, 616 .shutdown = ftdi_shutdown, 617 }; 618 619 620 #define WDR_TIMEOUT 5000 /* default urb timeout */ 621 #define WDR_SHORT_TIMEOUT 1000 /* shorter urb timeout */ 622 623 /* High and low are for DTR, RTS etc etc */ 624 #define HIGH 1 625 #define LOW 0 626 627 /* 628 * *************************************************************************** 629 * Utlity functions 630 * *************************************************************************** 631 */ 632 633 static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base) 634 { 635 unsigned short int divisor; 636 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left 637 if ((divisor3 & 0x7) == 7) divisor3 ++; // round x.7/8 up to x+1 638 divisor = divisor3 >> 3; 639 divisor3 &= 0x7; 640 if (divisor3 == 1) divisor |= 0xc000; else // 0.125 641 if (divisor3 >= 4) divisor |= 0x4000; else // 0.5 642 if (divisor3 != 0) divisor |= 0x8000; // 0.25 643 if (divisor == 1) divisor = 0; /* special case for maximum baud rate */ 644 return divisor; 645 } 646 647 static unsigned short int ftdi_232am_baud_to_divisor(int baud) 648 { 649 return(ftdi_232am_baud_base_to_divisor(baud, 48000000)); 650 } 651 652 static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base) 653 { 654 static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 }; 655 __u32 divisor; 656 int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left 657 divisor = divisor3 >> 3; 658 divisor |= (__u32)divfrac[divisor3 & 0x7] << 14; 659 /* Deal with special cases for highest baud rates. */ 660 if (divisor == 1) divisor = 0; else // 1.0 661 if (divisor == 0x4001) divisor = 1; // 1.5 662 return divisor; 663 } 664 665 static __u32 ftdi_232bm_baud_to_divisor(int baud) 666 { 667 return(ftdi_232bm_baud_base_to_divisor(baud, 48000000)); 668 } 669 670 #define set_mctrl(port, set) update_mctrl((port), (set), 0) 671 #define clear_mctrl(port, clear) update_mctrl((port), 0, (clear)) 672 673 static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned int clear) 674 { 675 struct ftdi_private *priv = usb_get_serial_port_data(port); 676 char *buf; 677 unsigned urb_value; 678 int rv; 679 680 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { 681 dbg("%s - DTR|RTS not being set|cleared", __FUNCTION__); 682 return 0; /* no change */ 683 } 684 685 buf = kmalloc(1, GFP_NOIO); 686 if (!buf) { 687 return -ENOMEM; 688 } 689 690 clear &= ~set; /* 'set' takes precedence over 'clear' */ 691 urb_value = 0; 692 if (clear & TIOCM_DTR) 693 urb_value |= FTDI_SIO_SET_DTR_LOW; 694 if (clear & TIOCM_RTS) 695 urb_value |= FTDI_SIO_SET_RTS_LOW; 696 if (set & TIOCM_DTR) 697 urb_value |= FTDI_SIO_SET_DTR_HIGH; 698 if (set & TIOCM_RTS) 699 urb_value |= FTDI_SIO_SET_RTS_HIGH; 700 rv = usb_control_msg(port->serial->dev, 701 usb_sndctrlpipe(port->serial->dev, 0), 702 FTDI_SIO_SET_MODEM_CTRL_REQUEST, 703 FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, 704 urb_value, priv->interface, 705 buf, 0, WDR_TIMEOUT); 706 707 kfree(buf); 708 if (rv < 0) { 709 err("%s Error from MODEM_CTRL urb: DTR %s, RTS %s", 710 __FUNCTION__, 711 (set & TIOCM_DTR) ? "HIGH" : 712 (clear & TIOCM_DTR) ? "LOW" : "unchanged", 713 (set & TIOCM_RTS) ? "HIGH" : 714 (clear & TIOCM_RTS) ? "LOW" : "unchanged"); 715 } else { 716 dbg("%s - DTR %s, RTS %s", __FUNCTION__, 717 (set & TIOCM_DTR) ? "HIGH" : 718 (clear & TIOCM_DTR) ? "LOW" : "unchanged", 719 (set & TIOCM_RTS) ? "HIGH" : 720 (clear & TIOCM_RTS) ? "LOW" : "unchanged"); 721 priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set; 722 } 723 return rv; 724 } 725 726 727 static __u32 get_ftdi_divisor(struct usb_serial_port * port); 728 729 730 static int change_speed(struct usb_serial_port *port) 731 { 732 struct ftdi_private *priv = usb_get_serial_port_data(port); 733 char *buf; 734 __u16 urb_value; 735 __u16 urb_index; 736 __u32 urb_index_value; 737 int rv; 738 739 buf = kmalloc(1, GFP_NOIO); 740 if (!buf) 741 return -ENOMEM; 742 743 urb_index_value = get_ftdi_divisor(port); 744 urb_value = (__u16)urb_index_value; 745 urb_index = (__u16)(urb_index_value >> 16); 746 if (priv->interface) { /* FT2232C */ 747 urb_index = (__u16)((urb_index << 8) | priv->interface); 748 } 749 750 rv = usb_control_msg(port->serial->dev, 751 usb_sndctrlpipe(port->serial->dev, 0), 752 FTDI_SIO_SET_BAUDRATE_REQUEST, 753 FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE, 754 urb_value, urb_index, 755 buf, 0, WDR_SHORT_TIMEOUT); 756 757 kfree(buf); 758 return rv; 759 } 760 761 762 static __u32 get_ftdi_divisor(struct usb_serial_port * port) 763 { /* get_ftdi_divisor */ 764 struct ftdi_private *priv = usb_get_serial_port_data(port); 765 __u32 div_value = 0; 766 int div_okay = 1; 767 int baud; 768 769 /* 770 * The logic involved in setting the baudrate can be cleanly split in 3 steps. 771 * Obtaining the actual baud rate is a little tricky since unix traditionally 772 * somehow ignored the possibility to set non-standard baud rates. 773 * 1. Standard baud rates are set in tty->termios->c_cflag 774 * 2. If these are not enough, you can set any speed using alt_speed as follows: 775 * - set tty->termios->c_cflag speed to B38400 776 * - set your real speed in tty->alt_speed; it gets ignored when 777 * alt_speed==0, (or) 778 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows: 779 * flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP], this just 780 * sets alt_speed to (HI: 57600, VHI: 115200, SHI: 230400, WARP: 460800) 781 * ** Steps 1, 2 are done courtesy of tty_get_baud_rate 782 * 3. You can also set baud rate by setting custom divisor as follows 783 * - set tty->termios->c_cflag speed to B38400 784 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows: 785 * o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST 786 * o custom_divisor set to baud_base / your_new_baudrate 787 * ** Step 3 is done courtesy of code borrowed from serial.c - I should really 788 * spend some time and separate+move this common code to serial.c, it is 789 * replicated in nearly every serial driver you see. 790 */ 791 792 /* 1. Get the baud rate from the tty settings, this observes alt_speed hack */ 793 794 baud = tty_get_baud_rate(port->tty); 795 dbg("%s - tty_get_baud_rate reports speed %d", __FUNCTION__, baud); 796 797 /* 2. Observe async-compatible custom_divisor hack, update baudrate if needed */ 798 799 if (baud == 38400 && 800 ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) && 801 (priv->custom_divisor)) { 802 baud = priv->baud_base / priv->custom_divisor; 803 dbg("%s - custom divisor %d sets baud rate to %d", __FUNCTION__, priv->custom_divisor, baud); 804 } 805 806 /* 3. Convert baudrate to device-specific divisor */ 807 808 if (!baud) baud = 9600; 809 switch(priv->chip_type) { 810 case SIO: /* SIO chip */ 811 switch(baud) { 812 case 300: div_value = ftdi_sio_b300; break; 813 case 600: div_value = ftdi_sio_b600; break; 814 case 1200: div_value = ftdi_sio_b1200; break; 815 case 2400: div_value = ftdi_sio_b2400; break; 816 case 4800: div_value = ftdi_sio_b4800; break; 817 case 9600: div_value = ftdi_sio_b9600; break; 818 case 19200: div_value = ftdi_sio_b19200; break; 819 case 38400: div_value = ftdi_sio_b38400; break; 820 case 57600: div_value = ftdi_sio_b57600; break; 821 case 115200: div_value = ftdi_sio_b115200; break; 822 } /* baud */ 823 if (div_value == 0) { 824 dbg("%s - Baudrate (%d) requested is not supported", __FUNCTION__, baud); 825 div_value = ftdi_sio_b9600; 826 div_okay = 0; 827 } 828 break; 829 case FT8U232AM: /* 8U232AM chip */ 830 if (baud <= 3000000) { 831 div_value = ftdi_232am_baud_to_divisor(baud); 832 } else { 833 dbg("%s - Baud rate too high!", __FUNCTION__); 834 div_value = ftdi_232am_baud_to_divisor(9600); 835 div_okay = 0; 836 } 837 break; 838 case FT232BM: /* FT232BM chip */ 839 case FT2232C: /* FT2232C chip */ 840 if (baud <= 3000000) { 841 div_value = ftdi_232bm_baud_to_divisor(baud); 842 } else { 843 dbg("%s - Baud rate too high!", __FUNCTION__); 844 div_value = ftdi_232bm_baud_to_divisor(9600); 845 div_okay = 0; 846 } 847 break; 848 } /* priv->chip_type */ 849 850 if (div_okay) { 851 dbg("%s - Baud rate set to %d (divisor 0x%lX) on chip %s", 852 __FUNCTION__, baud, (unsigned long)div_value, 853 ftdi_chip_name[priv->chip_type]); 854 } 855 856 return(div_value); 857 } 858 859 860 static int get_serial_info(struct usb_serial_port * port, struct serial_struct __user * retinfo) 861 { 862 struct ftdi_private *priv = usb_get_serial_port_data(port); 863 struct serial_struct tmp; 864 865 if (!retinfo) 866 return -EFAULT; 867 memset(&tmp, 0, sizeof(tmp)); 868 tmp.flags = priv->flags; 869 tmp.baud_base = priv->baud_base; 870 tmp.custom_divisor = priv->custom_divisor; 871 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 872 return -EFAULT; 873 return 0; 874 } /* get_serial_info */ 875 876 877 static int set_serial_info(struct usb_serial_port * port, struct serial_struct __user * newinfo) 878 { /* set_serial_info */ 879 struct ftdi_private *priv = usb_get_serial_port_data(port); 880 struct serial_struct new_serial; 881 struct ftdi_private old_priv; 882 883 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) 884 return -EFAULT; 885 old_priv = * priv; 886 887 /* Do error checking and permission checking */ 888 889 if (!capable(CAP_SYS_ADMIN)) { 890 if (((new_serial.flags & ~ASYNC_USR_MASK) != 891 (priv->flags & ~ASYNC_USR_MASK))) 892 return -EPERM; 893 priv->flags = ((priv->flags & ~ASYNC_USR_MASK) | 894 (new_serial.flags & ASYNC_USR_MASK)); 895 priv->custom_divisor = new_serial.custom_divisor; 896 goto check_and_exit; 897 } 898 899 if ((new_serial.baud_base != priv->baud_base) && 900 (new_serial.baud_base < 9600)) 901 return -EINVAL; 902 903 /* Make the changes - these are privileged changes! */ 904 905 priv->flags = ((priv->flags & ~ASYNC_FLAGS) | 906 (new_serial.flags & ASYNC_FLAGS)); 907 priv->custom_divisor = new_serial.custom_divisor; 908 909 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0; 910 911 check_and_exit: 912 if ((old_priv.flags & ASYNC_SPD_MASK) != 913 (priv->flags & ASYNC_SPD_MASK)) { 914 if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) 915 port->tty->alt_speed = 57600; 916 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) 917 port->tty->alt_speed = 115200; 918 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) 919 port->tty->alt_speed = 230400; 920 else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) 921 port->tty->alt_speed = 460800; 922 else 923 port->tty->alt_speed = 0; 924 } 925 if (((old_priv.flags & ASYNC_SPD_MASK) != 926 (priv->flags & ASYNC_SPD_MASK)) || 927 (((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) && 928 (old_priv.custom_divisor != priv->custom_divisor))) { 929 change_speed(port); 930 } 931 932 return (0); 933 934 } /* set_serial_info */ 935 936 937 /* Determine type of FTDI chip based on USB config and descriptor. */ 938 static void ftdi_determine_type(struct usb_serial_port *port) 939 { 940 struct ftdi_private *priv = usb_get_serial_port_data(port); 941 struct usb_serial *serial = port->serial; 942 struct usb_device *udev = serial->dev; 943 unsigned version; 944 unsigned interfaces; 945 946 /* Assume it is not the original SIO device for now. */ 947 priv->baud_base = 48000000 / 2; 948 priv->write_offset = 0; 949 950 version = le16_to_cpu(udev->descriptor.bcdDevice); 951 interfaces = udev->actconfig->desc.bNumInterfaces; 952 dbg("%s: bcdDevice = 0x%x, bNumInterfaces = %u", __FUNCTION__, 953 version, interfaces); 954 if (interfaces > 1) { 955 int inter; 956 957 /* Multiple interfaces. Assume FT2232C. */ 958 priv->chip_type = FT2232C; 959 /* Determine interface code. */ 960 inter = serial->interface->altsetting->desc.bInterfaceNumber; 961 if (inter == 0) { 962 priv->interface = PIT_SIOA; 963 } else { 964 priv->interface = PIT_SIOB; 965 } 966 /* BM-type devices have a bug where bcdDevice gets set 967 * to 0x200 when iSerialNumber is 0. */ 968 if (version < 0x500) { 969 dbg("%s: something fishy - bcdDevice too low for multi-interface device", 970 __FUNCTION__); 971 } 972 } else if (version < 0x200) { 973 /* Old device. Assume its the original SIO. */ 974 priv->chip_type = SIO; 975 priv->baud_base = 12000000 / 16; 976 priv->write_offset = 1; 977 } else if (version < 0x400) { 978 /* Assume its an FT8U232AM (or FT8U245AM) */ 979 /* (It might be a BM because of the iSerialNumber bug, 980 * but it will still work as an AM device.) */ 981 priv->chip_type = FT8U232AM; 982 } else { 983 /* Assume its an FT232BM (or FT245BM) */ 984 priv->chip_type = FT232BM; 985 } 986 info("Detected %s", ftdi_chip_name[priv->chip_type]); 987 } 988 989 990 /* 991 * *************************************************************************** 992 * Sysfs Attribute 993 * *************************************************************************** 994 */ 995 996 static ssize_t show_latency_timer(struct device *dev, struct device_attribute *attr, char *buf) 997 { 998 struct usb_serial_port *port = to_usb_serial_port(dev); 999 struct ftdi_private *priv = usb_get_serial_port_data(port); 1000 struct usb_device *udev; 1001 unsigned short latency = 0; 1002 int rv = 0; 1003 1004 udev = to_usb_device(dev); 1005 1006 dbg("%s",__FUNCTION__); 1007 1008 rv = usb_control_msg(udev, 1009 usb_rcvctrlpipe(udev, 0), 1010 FTDI_SIO_GET_LATENCY_TIMER_REQUEST, 1011 FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE, 1012 0, priv->interface, 1013 (char*) &latency, 1, WDR_TIMEOUT); 1014 1015 if (rv < 0) { 1016 dev_err(dev, "Unable to read latency timer: %i", rv); 1017 return -EIO; 1018 } 1019 return sprintf(buf, "%i\n", latency); 1020 } 1021 1022 /* Write a new value of the latency timer, in units of milliseconds. */ 1023 static ssize_t store_latency_timer(struct device *dev, struct device_attribute *attr, const char *valbuf, 1024 size_t count) 1025 { 1026 struct usb_serial_port *port = to_usb_serial_port(dev); 1027 struct ftdi_private *priv = usb_get_serial_port_data(port); 1028 struct usb_device *udev; 1029 char buf[1]; 1030 int v = simple_strtoul(valbuf, NULL, 10); 1031 int rv = 0; 1032 1033 udev = to_usb_device(dev); 1034 1035 dbg("%s: setting latency timer = %i", __FUNCTION__, v); 1036 1037 rv = usb_control_msg(udev, 1038 usb_sndctrlpipe(udev, 0), 1039 FTDI_SIO_SET_LATENCY_TIMER_REQUEST, 1040 FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE, 1041 v, priv->interface, 1042 buf, 0, WDR_TIMEOUT); 1043 1044 if (rv < 0) { 1045 dev_err(dev, "Unable to write latency timer: %i", rv); 1046 return -EIO; 1047 } 1048 1049 return count; 1050 } 1051 1052 /* Write an event character directly to the FTDI register. The ASCII 1053 value is in the low 8 bits, with the enable bit in the 9th bit. */ 1054 static ssize_t store_event_char(struct device *dev, struct device_attribute *attr, const char *valbuf, 1055 size_t count) 1056 { 1057 struct usb_serial_port *port = to_usb_serial_port(dev); 1058 struct ftdi_private *priv = usb_get_serial_port_data(port); 1059 struct usb_device *udev; 1060 char buf[1]; 1061 int v = simple_strtoul(valbuf, NULL, 10); 1062 int rv = 0; 1063 1064 udev = to_usb_device(dev); 1065 1066 dbg("%s: setting event char = %i", __FUNCTION__, v); 1067 1068 rv = usb_control_msg(udev, 1069 usb_sndctrlpipe(udev, 0), 1070 FTDI_SIO_SET_EVENT_CHAR_REQUEST, 1071 FTDI_SIO_SET_EVENT_CHAR_REQUEST_TYPE, 1072 v, priv->interface, 1073 buf, 0, WDR_TIMEOUT); 1074 1075 if (rv < 0) { 1076 dbg("Unable to write event character: %i", rv); 1077 return -EIO; 1078 } 1079 1080 return count; 1081 } 1082 1083 static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer, store_latency_timer); 1084 static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char); 1085 1086 static void create_sysfs_attrs(struct usb_serial *serial) 1087 { 1088 struct ftdi_private *priv; 1089 struct usb_device *udev; 1090 1091 dbg("%s",__FUNCTION__); 1092 1093 priv = usb_get_serial_port_data(serial->port[0]); 1094 udev = serial->dev; 1095 1096 /* XXX I've no idea if the original SIO supports the event_char 1097 * sysfs parameter, so I'm playing it safe. */ 1098 if (priv->chip_type != SIO) { 1099 dbg("sysfs attributes for %s", ftdi_chip_name[priv->chip_type]); 1100 device_create_file(&udev->dev, &dev_attr_event_char); 1101 if (priv->chip_type == FT232BM || priv->chip_type == FT2232C) { 1102 device_create_file(&udev->dev, &dev_attr_latency_timer); 1103 } 1104 } 1105 } 1106 1107 static void remove_sysfs_attrs(struct usb_serial *serial) 1108 { 1109 struct ftdi_private *priv; 1110 struct usb_device *udev; 1111 1112 dbg("%s",__FUNCTION__); 1113 1114 priv = usb_get_serial_port_data(serial->port[0]); 1115 udev = serial->dev; 1116 1117 /* XXX see create_sysfs_attrs */ 1118 if (priv->chip_type != SIO) { 1119 device_remove_file(&udev->dev, &dev_attr_event_char); 1120 if (priv->chip_type == FT232BM || priv->chip_type == FT2232C) { 1121 device_remove_file(&udev->dev, &dev_attr_latency_timer); 1122 } 1123 } 1124 1125 } 1126 1127 /* 1128 * *************************************************************************** 1129 * FTDI driver specific functions 1130 * *************************************************************************** 1131 */ 1132 1133 /* Probe function to check for special devices */ 1134 static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id) 1135 { 1136 usb_set_serial_data(serial, (void *)id->driver_info); 1137 1138 return (0); 1139 } 1140 1141 /* attach subroutine */ 1142 static int ftdi_sio_attach (struct usb_serial *serial) 1143 { 1144 struct usb_serial_port *port = serial->port[0]; 1145 struct ftdi_private *priv; 1146 struct ftdi_sio_quirk *quirk; 1147 1148 dbg("%s",__FUNCTION__); 1149 1150 priv = kzalloc(sizeof(struct ftdi_private), GFP_KERNEL); 1151 if (!priv){ 1152 err("%s- kmalloc(%Zd) failed.", __FUNCTION__, sizeof(struct ftdi_private)); 1153 return -ENOMEM; 1154 } 1155 1156 spin_lock_init(&priv->rx_lock); 1157 init_waitqueue_head(&priv->delta_msr_wait); 1158 /* This will push the characters through immediately rather 1159 than queue a task to deliver them */ 1160 priv->flags = ASYNC_LOW_LATENCY; 1161 1162 /* Increase the size of read buffers */ 1163 kfree(port->bulk_in_buffer); 1164 port->bulk_in_buffer = kmalloc (BUFSZ, GFP_KERNEL); 1165 if (!port->bulk_in_buffer) { 1166 kfree (priv); 1167 return -ENOMEM; 1168 } 1169 if (port->read_urb) { 1170 port->read_urb->transfer_buffer = port->bulk_in_buffer; 1171 port->read_urb->transfer_buffer_length = BUFSZ; 1172 } 1173 1174 INIT_WORK(&priv->rx_work, ftdi_process_read, port); 1175 1176 /* Free port's existing write urb and transfer buffer. */ 1177 if (port->write_urb) { 1178 usb_free_urb (port->write_urb); 1179 port->write_urb = NULL; 1180 } 1181 kfree(port->bulk_out_buffer); 1182 port->bulk_out_buffer = NULL; 1183 1184 usb_set_serial_port_data(serial->port[0], priv); 1185 1186 ftdi_determine_type (serial->port[0]); 1187 create_sysfs_attrs(serial); 1188 1189 /* Check for device requiring special set up. */ 1190 quirk = (struct ftdi_sio_quirk *)usb_get_serial_data(serial); 1191 if (quirk && quirk->setup) { 1192 quirk->setup(serial); 1193 } 1194 1195 return (0); 1196 } /* ftdi_sio_attach */ 1197 1198 1199 /* Setup for the USB-UIRT device, which requires hardwired 1200 * baudrate (38400 gets mapped to 312500) */ 1201 /* Called from usbserial:serial_probe */ 1202 static void ftdi_USB_UIRT_setup (struct usb_serial *serial) 1203 { 1204 struct ftdi_private *priv; 1205 1206 dbg("%s",__FUNCTION__); 1207 1208 priv = usb_get_serial_port_data(serial->port[0]); 1209 priv->flags |= ASYNC_SPD_CUST; 1210 priv->custom_divisor = 77; 1211 priv->force_baud = B38400; 1212 } /* ftdi_USB_UIRT_setup */ 1213 1214 /* Setup for the HE-TIRA1 device, which requires hardwired 1215 * baudrate (38400 gets mapped to 100000) and RTS-CTS enabled. */ 1216 static void ftdi_HE_TIRA1_setup (struct usb_serial *serial) 1217 { 1218 struct ftdi_private *priv; 1219 1220 dbg("%s",__FUNCTION__); 1221 1222 priv = usb_get_serial_port_data(serial->port[0]); 1223 priv->flags |= ASYNC_SPD_CUST; 1224 priv->custom_divisor = 240; 1225 priv->force_baud = B38400; 1226 priv->force_rtscts = 1; 1227 } /* ftdi_HE_TIRA1_setup */ 1228 1229 1230 /* ftdi_shutdown is called from usbserial:usb_serial_disconnect 1231 * it is called when the usb device is disconnected 1232 * 1233 * usbserial:usb_serial_disconnect 1234 * calls __serial_close for each open of the port 1235 * shutdown is called then (ie ftdi_shutdown) 1236 */ 1237 1238 1239 static void ftdi_shutdown (struct usb_serial *serial) 1240 { /* ftdi_shutdown */ 1241 1242 struct usb_serial_port *port = serial->port[0]; 1243 struct ftdi_private *priv = usb_get_serial_port_data(port); 1244 1245 dbg("%s", __FUNCTION__); 1246 1247 remove_sysfs_attrs(serial); 1248 1249 /* all open ports are closed at this point 1250 * (by usbserial.c:__serial_close, which calls ftdi_close) 1251 */ 1252 1253 if (priv) { 1254 usb_set_serial_port_data(port, NULL); 1255 kfree(priv); 1256 } 1257 } /* ftdi_shutdown */ 1258 1259 1260 static int ftdi_open (struct usb_serial_port *port, struct file *filp) 1261 { /* ftdi_open */ 1262 struct termios tmp_termios; 1263 struct usb_device *dev = port->serial->dev; 1264 struct ftdi_private *priv = usb_get_serial_port_data(port); 1265 unsigned long flags; 1266 1267 int result = 0; 1268 char buf[1]; /* Needed for the usb_control_msg I think */ 1269 1270 dbg("%s", __FUNCTION__); 1271 1272 1273 port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0; 1274 1275 /* No error checking for this (will get errors later anyway) */ 1276 /* See ftdi_sio.h for description of what is reset */ 1277 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 1278 FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE, 1279 FTDI_SIO_RESET_SIO, 1280 priv->interface, buf, 0, WDR_TIMEOUT); 1281 1282 /* Termios defaults are set by usb_serial_init. We don't change 1283 port->tty->termios - this would loose speed settings, etc. 1284 This is same behaviour as serial.c/rs_open() - Kuba */ 1285 1286 /* ftdi_set_termios will send usb control messages */ 1287 ftdi_set_termios(port, &tmp_termios); 1288 1289 /* FIXME: Flow control might be enabled, so it should be checked - 1290 we have no control of defaults! */ 1291 /* Turn on RTS and DTR since we are not flow controlling by default */ 1292 set_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1293 1294 /* Not throttled */ 1295 spin_lock_irqsave(&priv->rx_lock, flags); 1296 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 1297 spin_unlock_irqrestore(&priv->rx_lock, flags); 1298 1299 /* Start reading from the device */ 1300 priv->rx_processed = 0; 1301 usb_fill_bulk_urb(port->read_urb, dev, 1302 usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress), 1303 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, 1304 ftdi_read_bulk_callback, port); 1305 result = usb_submit_urb(port->read_urb, GFP_KERNEL); 1306 if (result) 1307 err("%s - failed submitting read urb, error %d", __FUNCTION__, result); 1308 1309 1310 return result; 1311 } /* ftdi_open */ 1312 1313 1314 1315 /* 1316 * usbserial:__serial_close only calls ftdi_close if the point is open 1317 * 1318 * This only gets called when it is the last close 1319 * 1320 * 1321 */ 1322 1323 static void ftdi_close (struct usb_serial_port *port, struct file *filp) 1324 { /* ftdi_close */ 1325 unsigned int c_cflag = port->tty->termios->c_cflag; 1326 struct ftdi_private *priv = usb_get_serial_port_data(port); 1327 char buf[1]; 1328 1329 dbg("%s", __FUNCTION__); 1330 1331 if (c_cflag & HUPCL){ 1332 /* Disable flow control */ 1333 if (usb_control_msg(port->serial->dev, 1334 usb_sndctrlpipe(port->serial->dev, 0), 1335 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1336 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1337 0, priv->interface, buf, 0, 1338 WDR_TIMEOUT) < 0) { 1339 err("error from flowcontrol urb"); 1340 } 1341 1342 /* drop RTS and DTR */ 1343 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1344 } /* Note change no line if hupcl is off */ 1345 1346 /* cancel any scheduled reading */ 1347 cancel_delayed_work(&priv->rx_work); 1348 flush_scheduled_work(); 1349 1350 /* shutdown our bulk read */ 1351 if (port->read_urb) 1352 usb_kill_urb(port->read_urb); 1353 } /* ftdi_close */ 1354 1355 1356 1357 /* The SIO requires the first byte to have: 1358 * B0 1 1359 * B1 0 1360 * B2..7 length of message excluding byte 0 1361 * 1362 * The new devices do not require this byte 1363 */ 1364 static int ftdi_write (struct usb_serial_port *port, 1365 const unsigned char *buf, int count) 1366 { /* ftdi_write */ 1367 struct ftdi_private *priv = usb_get_serial_port_data(port); 1368 struct urb *urb; 1369 unsigned char *buffer; 1370 int data_offset ; /* will be 1 for the SIO and 0 otherwise */ 1371 int status; 1372 int transfer_size; 1373 1374 dbg("%s port %d, %d bytes", __FUNCTION__, port->number, count); 1375 1376 if (count == 0) { 1377 dbg("write request of 0 bytes"); 1378 return 0; 1379 } 1380 1381 data_offset = priv->write_offset; 1382 dbg("data_offset set to %d",data_offset); 1383 1384 /* Determine total transfer size */ 1385 transfer_size = count; 1386 if (data_offset > 0) { 1387 /* Original sio needs control bytes too... */ 1388 transfer_size += (data_offset * 1389 ((count + (PKTSZ - 1 - data_offset)) / 1390 (PKTSZ - data_offset))); 1391 } 1392 1393 buffer = kmalloc (transfer_size, GFP_ATOMIC); 1394 if (!buffer) { 1395 err("%s ran out of kernel memory for urb ...", __FUNCTION__); 1396 return -ENOMEM; 1397 } 1398 1399 urb = usb_alloc_urb(0, GFP_ATOMIC); 1400 if (!urb) { 1401 err("%s - no more free urbs", __FUNCTION__); 1402 kfree (buffer); 1403 return -ENOMEM; 1404 } 1405 1406 /* Copy data */ 1407 if (data_offset > 0) { 1408 /* Original sio requires control byte at start of each packet. */ 1409 int user_pktsz = PKTSZ - data_offset; 1410 int todo = count; 1411 unsigned char *first_byte = buffer; 1412 const unsigned char *current_position = buf; 1413 1414 while (todo > 0) { 1415 if (user_pktsz > todo) { 1416 user_pktsz = todo; 1417 } 1418 /* Write the control byte at the front of the packet*/ 1419 *first_byte = 1 | ((user_pktsz) << 2); 1420 /* Copy data for packet */ 1421 memcpy (first_byte + data_offset, 1422 current_position, user_pktsz); 1423 first_byte += user_pktsz + data_offset; 1424 current_position += user_pktsz; 1425 todo -= user_pktsz; 1426 } 1427 } else { 1428 /* No control byte required. */ 1429 /* Copy in the data to send */ 1430 memcpy (buffer, buf, count); 1431 } 1432 1433 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, buffer); 1434 1435 /* fill the buffer and send it */ 1436 usb_fill_bulk_urb(urb, port->serial->dev, 1437 usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress), 1438 buffer, transfer_size, 1439 ftdi_write_bulk_callback, port); 1440 1441 status = usb_submit_urb(urb, GFP_ATOMIC); 1442 if (status) { 1443 err("%s - failed submitting write urb, error %d", __FUNCTION__, status); 1444 count = status; 1445 kfree (buffer); 1446 } 1447 1448 /* we are done with this urb, so let the host driver 1449 * really free it when it is finished with it */ 1450 usb_free_urb (urb); 1451 1452 dbg("%s write returning: %d", __FUNCTION__, count); 1453 return count; 1454 } /* ftdi_write */ 1455 1456 1457 /* This function may get called when the device is closed */ 1458 1459 static void ftdi_write_bulk_callback (struct urb *urb, struct pt_regs *regs) 1460 { 1461 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1462 1463 /* free up the transfer buffer, as usb_free_urb() does not do this */ 1464 kfree (urb->transfer_buffer); 1465 1466 dbg("%s - port %d", __FUNCTION__, port->number); 1467 1468 if (urb->status) { 1469 dbg("nonzero write bulk status received: %d", urb->status); 1470 return; 1471 } 1472 1473 schedule_work(&port->work); 1474 } /* ftdi_write_bulk_callback */ 1475 1476 1477 static int ftdi_write_room( struct usb_serial_port *port ) 1478 { 1479 dbg("%s - port %d", __FUNCTION__, port->number); 1480 1481 /* 1482 * We really can take anything the user throws at us 1483 * but let's pick a nice big number to tell the tty 1484 * layer that we have lots of free space 1485 */ 1486 return 2048; 1487 } /* ftdi_write_room */ 1488 1489 1490 static int ftdi_chars_in_buffer (struct usb_serial_port *port) 1491 { /* ftdi_chars_in_buffer */ 1492 dbg("%s - port %d", __FUNCTION__, port->number); 1493 1494 /* 1495 * We can't really account for how much data we 1496 * have sent out, but hasn't made it through to the 1497 * device, so just tell the tty layer that everything 1498 * is flushed. 1499 */ 1500 return 0; 1501 } /* ftdi_chars_in_buffer */ 1502 1503 1504 1505 static void ftdi_read_bulk_callback (struct urb *urb, struct pt_regs *regs) 1506 { /* ftdi_read_bulk_callback */ 1507 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 1508 struct tty_struct *tty; 1509 struct ftdi_private *priv; 1510 1511 if (urb->number_of_packets > 0) { 1512 err("%s transfer_buffer_length %d actual_length %d number of packets %d",__FUNCTION__, 1513 urb->transfer_buffer_length, urb->actual_length, urb->number_of_packets ); 1514 err("%s transfer_flags %x ", __FUNCTION__,urb->transfer_flags ); 1515 } 1516 1517 dbg("%s - port %d", __FUNCTION__, port->number); 1518 1519 if (port->open_count <= 0) 1520 return; 1521 1522 tty = port->tty; 1523 if (!tty) { 1524 dbg("%s - bad tty pointer - exiting",__FUNCTION__); 1525 return; 1526 } 1527 1528 priv = usb_get_serial_port_data(port); 1529 if (!priv) { 1530 dbg("%s - bad port private data pointer - exiting", __FUNCTION__); 1531 return; 1532 } 1533 1534 if (urb != port->read_urb) { 1535 err("%s - Not my urb!", __FUNCTION__); 1536 } 1537 1538 if (urb->status) { 1539 /* This will happen at close every time so it is a dbg not an err */ 1540 dbg("(this is ok on close) nonzero read bulk status received: %d", urb->status); 1541 return; 1542 } 1543 1544 ftdi_process_read(port); 1545 1546 } /* ftdi_read_bulk_callback */ 1547 1548 1549 static void ftdi_process_read (void *param) 1550 { /* ftdi_process_read */ 1551 struct usb_serial_port *port = (struct usb_serial_port*)param; 1552 struct urb *urb; 1553 struct tty_struct *tty; 1554 struct ftdi_private *priv; 1555 char error_flag; 1556 unsigned char *data; 1557 1558 int i; 1559 int result; 1560 int need_flip; 1561 int packet_offset; 1562 unsigned long flags; 1563 1564 dbg("%s - port %d", __FUNCTION__, port->number); 1565 1566 if (port->open_count <= 0) 1567 return; 1568 1569 tty = port->tty; 1570 if (!tty) { 1571 dbg("%s - bad tty pointer - exiting",__FUNCTION__); 1572 return; 1573 } 1574 1575 priv = usb_get_serial_port_data(port); 1576 if (!priv) { 1577 dbg("%s - bad port private data pointer - exiting", __FUNCTION__); 1578 return; 1579 } 1580 1581 urb = port->read_urb; 1582 if (!urb) { 1583 dbg("%s - bad read_urb pointer - exiting", __FUNCTION__); 1584 return; 1585 } 1586 1587 data = urb->transfer_buffer; 1588 1589 if (priv->rx_processed) { 1590 dbg("%s - already processed: %d bytes, %d remain", __FUNCTION__, 1591 priv->rx_processed, 1592 urb->actual_length - priv->rx_processed); 1593 } else { 1594 /* The first two bytes of every read packet are status */ 1595 if (urb->actual_length > 2) { 1596 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); 1597 } else { 1598 dbg("Status only: %03oo %03oo",data[0],data[1]); 1599 } 1600 } 1601 1602 1603 /* TO DO -- check for hung up line and handle appropriately: */ 1604 /* send hangup */ 1605 /* See acm.c - you do a tty_hangup - eg tty_hangup(tty) */ 1606 /* if CD is dropped and the line is not CLOCAL then we should hangup */ 1607 1608 need_flip = 0; 1609 for (packet_offset = priv->rx_processed; packet_offset < urb->actual_length; packet_offset += PKTSZ) { 1610 int length; 1611 1612 /* Compare new line status to the old one, signal if different */ 1613 /* N.B. packet may be processed more than once, but differences 1614 * are only processed once. */ 1615 if (priv != NULL) { 1616 char new_status = data[packet_offset+0] & FTDI_STATUS_B0_MASK; 1617 if (new_status != priv->prev_status) { 1618 priv->diff_status |= new_status ^ priv->prev_status; 1619 wake_up_interruptible(&priv->delta_msr_wait); 1620 priv->prev_status = new_status; 1621 } 1622 } 1623 1624 length = min(PKTSZ, urb->actual_length-packet_offset)-2; 1625 if (length < 0) { 1626 err("%s - bad packet length: %d", __FUNCTION__, length+2); 1627 length = 0; 1628 } 1629 1630 if (priv->rx_flags & THROTTLED) { 1631 dbg("%s - throttled", __FUNCTION__); 1632 break; 1633 } 1634 if (tty_buffer_request_room(tty, length) < length) { 1635 /* break out & wait for throttling/unthrottling to happen */ 1636 dbg("%s - receive room low", __FUNCTION__); 1637 break; 1638 } 1639 1640 /* Handle errors and break */ 1641 error_flag = TTY_NORMAL; 1642 /* Although the device uses a bitmask and hence can have multiple */ 1643 /* errors on a packet - the order here sets the priority the */ 1644 /* error is returned to the tty layer */ 1645 1646 if ( data[packet_offset+1] & FTDI_RS_OE ) { 1647 error_flag = TTY_OVERRUN; 1648 dbg("OVERRRUN error"); 1649 } 1650 if ( data[packet_offset+1] & FTDI_RS_BI ) { 1651 error_flag = TTY_BREAK; 1652 dbg("BREAK received"); 1653 } 1654 if ( data[packet_offset+1] & FTDI_RS_PE ) { 1655 error_flag = TTY_PARITY; 1656 dbg("PARITY error"); 1657 } 1658 if ( data[packet_offset+1] & FTDI_RS_FE ) { 1659 error_flag = TTY_FRAME; 1660 dbg("FRAMING error"); 1661 } 1662 if (length > 0) { 1663 for (i = 2; i < length+2; i++) { 1664 /* Note that the error flag is duplicated for 1665 every character received since we don't know 1666 which character it applied to */ 1667 tty_insert_flip_char(tty, data[packet_offset+i], error_flag); 1668 } 1669 need_flip = 1; 1670 } 1671 1672 #ifdef NOT_CORRECT_BUT_KEEPING_IT_FOR_NOW 1673 /* if a parity error is detected you get status packets forever 1674 until a character is sent without a parity error. 1675 This doesn't work well since the application receives a never 1676 ending stream of bad data - even though new data hasn't been sent. 1677 Therefore I (bill) have taken this out. 1678 However - this might make sense for framing errors and so on 1679 so I am leaving the code in for now. 1680 */ 1681 else { 1682 if (error_flag != TTY_NORMAL){ 1683 dbg("error_flag is not normal"); 1684 /* In this case it is just status - if that is an error send a bad character */ 1685 if(tty->flip.count >= TTY_FLIPBUF_SIZE) { 1686 tty_flip_buffer_push(tty); 1687 } 1688 tty_insert_flip_char(tty, 0xff, error_flag); 1689 need_flip = 1; 1690 } 1691 } 1692 #endif 1693 } /* "for(packet_offset=0..." */ 1694 1695 /* Low latency */ 1696 if (need_flip) { 1697 tty_flip_buffer_push(tty); 1698 } 1699 1700 if (packet_offset < urb->actual_length) { 1701 /* not completely processed - record progress */ 1702 priv->rx_processed = packet_offset; 1703 dbg("%s - incomplete, %d bytes processed, %d remain", 1704 __FUNCTION__, packet_offset, 1705 urb->actual_length - packet_offset); 1706 /* check if we were throttled while processing */ 1707 spin_lock_irqsave(&priv->rx_lock, flags); 1708 if (priv->rx_flags & THROTTLED) { 1709 priv->rx_flags |= ACTUALLY_THROTTLED; 1710 spin_unlock_irqrestore(&priv->rx_lock, flags); 1711 dbg("%s - deferring remainder until unthrottled", 1712 __FUNCTION__); 1713 return; 1714 } 1715 spin_unlock_irqrestore(&priv->rx_lock, flags); 1716 /* if the port is closed stop trying to read */ 1717 if (port->open_count > 0){ 1718 /* delay processing of remainder */ 1719 schedule_delayed_work(&priv->rx_work, 1); 1720 } else { 1721 dbg("%s - port is closed", __FUNCTION__); 1722 } 1723 return; 1724 } 1725 1726 /* urb is completely processed */ 1727 priv->rx_processed = 0; 1728 1729 /* if the port is closed stop trying to read */ 1730 if (port->open_count > 0){ 1731 /* Continue trying to always read */ 1732 usb_fill_bulk_urb(port->read_urb, port->serial->dev, 1733 usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress), 1734 port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, 1735 ftdi_read_bulk_callback, port); 1736 1737 result = usb_submit_urb(port->read_urb, GFP_ATOMIC); 1738 if (result) 1739 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); 1740 } 1741 1742 return; 1743 } /* ftdi_process_read */ 1744 1745 1746 static void ftdi_break_ctl( struct usb_serial_port *port, int break_state ) 1747 { 1748 struct ftdi_private *priv = usb_get_serial_port_data(port); 1749 __u16 urb_value = 0; 1750 char buf[1]; 1751 1752 /* break_state = -1 to turn on break, and 0 to turn off break */ 1753 /* see drivers/char/tty_io.c to see it used */ 1754 /* last_set_data_urb_value NEVER has the break bit set in it */ 1755 1756 if (break_state) { 1757 urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK; 1758 } else { 1759 urb_value = priv->last_set_data_urb_value; 1760 } 1761 1762 1763 if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), 1764 FTDI_SIO_SET_DATA_REQUEST, 1765 FTDI_SIO_SET_DATA_REQUEST_TYPE, 1766 urb_value , priv->interface, 1767 buf, 0, WDR_TIMEOUT) < 0) { 1768 err("%s FAILED to enable/disable break state (state was %d)", __FUNCTION__,break_state); 1769 } 1770 1771 dbg("%s break state is %d - urb is %d", __FUNCTION__,break_state, urb_value); 1772 1773 } 1774 1775 1776 /* old_termios contains the original termios settings and tty->termios contains 1777 * the new setting to be used 1778 * WARNING: set_termios calls this with old_termios in kernel space 1779 */ 1780 1781 static void ftdi_set_termios (struct usb_serial_port *port, struct termios *old_termios) 1782 { /* ftdi_termios */ 1783 struct usb_device *dev = port->serial->dev; 1784 unsigned int cflag = port->tty->termios->c_cflag; 1785 struct ftdi_private *priv = usb_get_serial_port_data(port); 1786 __u16 urb_value; /* will hold the new flags */ 1787 char buf[1]; /* Perhaps I should dynamically alloc this? */ 1788 1789 // Added for xon/xoff support 1790 unsigned int iflag = port->tty->termios->c_iflag; 1791 unsigned char vstop; 1792 unsigned char vstart; 1793 1794 dbg("%s", __FUNCTION__); 1795 1796 /* Force baud rate if this device requires it, unless it is set to B0. */ 1797 if (priv->force_baud && ((port->tty->termios->c_cflag & CBAUD) != B0)) { 1798 dbg("%s: forcing baud rate for this device", __FUNCTION__); 1799 port->tty->termios->c_cflag &= ~CBAUD; 1800 port->tty->termios->c_cflag |= priv->force_baud; 1801 } 1802 1803 /* Force RTS-CTS if this device requires it. */ 1804 if (priv->force_rtscts) { 1805 dbg("%s: forcing rtscts for this device", __FUNCTION__); 1806 port->tty->termios->c_cflag |= CRTSCTS; 1807 } 1808 1809 cflag = port->tty->termios->c_cflag; 1810 1811 /* FIXME -For this cut I don't care if the line is really changing or 1812 not - so just do the change regardless - should be able to 1813 compare old_termios and tty->termios */ 1814 /* NOTE These routines can get interrupted by 1815 ftdi_sio_read_bulk_callback - need to examine what this 1816 means - don't see any problems yet */ 1817 1818 /* Set number of data bits, parity, stop bits */ 1819 1820 urb_value = 0; 1821 urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 : 1822 FTDI_SIO_SET_DATA_STOP_BITS_1); 1823 urb_value |= (cflag & PARENB ? 1824 (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD : 1825 FTDI_SIO_SET_DATA_PARITY_EVEN) : 1826 FTDI_SIO_SET_DATA_PARITY_NONE); 1827 if (cflag & CSIZE) { 1828 switch (cflag & CSIZE) { 1829 case CS5: urb_value |= 5; dbg("Setting CS5"); break; 1830 case CS6: urb_value |= 6; dbg("Setting CS6"); break; 1831 case CS7: urb_value |= 7; dbg("Setting CS7"); break; 1832 case CS8: urb_value |= 8; dbg("Setting CS8"); break; 1833 default: 1834 err("CSIZE was set but not CS5-CS8"); 1835 } 1836 } 1837 1838 /* This is needed by the break command since it uses the same command - but is 1839 * or'ed with this value */ 1840 priv->last_set_data_urb_value = urb_value; 1841 1842 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 1843 FTDI_SIO_SET_DATA_REQUEST, 1844 FTDI_SIO_SET_DATA_REQUEST_TYPE, 1845 urb_value , priv->interface, 1846 buf, 0, WDR_SHORT_TIMEOUT) < 0) { 1847 err("%s FAILED to set databits/stopbits/parity", __FUNCTION__); 1848 } 1849 1850 /* Now do the baudrate */ 1851 if ((cflag & CBAUD) == B0 ) { 1852 /* Disable flow control */ 1853 if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 1854 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1855 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1856 0, priv->interface, 1857 buf, 0, WDR_TIMEOUT) < 0) { 1858 err("%s error from disable flowcontrol urb", __FUNCTION__); 1859 } 1860 /* Drop RTS and DTR */ 1861 clear_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1862 } else { 1863 /* set the baudrate determined before */ 1864 if (change_speed(port)) { 1865 err("%s urb failed to set baudrate", __FUNCTION__); 1866 } 1867 /* Ensure RTS and DTR are raised when baudrate changed from 0 */ 1868 if ((old_termios->c_cflag & CBAUD) == B0) { 1869 set_mctrl(port, TIOCM_DTR | TIOCM_RTS); 1870 } 1871 } 1872 1873 /* Set flow control */ 1874 /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */ 1875 if (cflag & CRTSCTS) { 1876 dbg("%s Setting to CRTSCTS flow control", __FUNCTION__); 1877 if (usb_control_msg(dev, 1878 usb_sndctrlpipe(dev, 0), 1879 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1880 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1881 0 , (FTDI_SIO_RTS_CTS_HS | priv->interface), 1882 buf, 0, WDR_TIMEOUT) < 0) { 1883 err("urb failed to set to rts/cts flow control"); 1884 } 1885 1886 } else { 1887 /* 1888 * Xon/Xoff code 1889 * 1890 * Check the IXOFF status in the iflag component of the termios structure 1891 * if IXOFF is not set, the pre-xon/xoff code is executed. 1892 */ 1893 if (iflag & IXOFF) { 1894 dbg("%s request to enable xonxoff iflag=%04x",__FUNCTION__,iflag); 1895 // Try to enable the XON/XOFF on the ftdi_sio 1896 // Set the vstart and vstop -- could have been done up above where 1897 // a lot of other dereferencing is done but that would be very 1898 // inefficient as vstart and vstop are not always needed 1899 vstart=port->tty->termios->c_cc[VSTART]; 1900 vstop=port->tty->termios->c_cc[VSTOP]; 1901 urb_value=(vstop << 8) | (vstart); 1902 1903 if (usb_control_msg(dev, 1904 usb_sndctrlpipe(dev, 0), 1905 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1906 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1907 urb_value , (FTDI_SIO_XON_XOFF_HS 1908 | priv->interface), 1909 buf, 0, WDR_TIMEOUT) < 0) { 1910 err("urb failed to set to xon/xoff flow control"); 1911 } 1912 } else { 1913 /* else clause to only run if cfag ! CRTSCTS and iflag ! XOFF */ 1914 /* CHECKME Assuming XON/XOFF handled by tty stack - not by device */ 1915 dbg("%s Turning off hardware flow control", __FUNCTION__); 1916 if (usb_control_msg(dev, 1917 usb_sndctrlpipe(dev, 0), 1918 FTDI_SIO_SET_FLOW_CTRL_REQUEST, 1919 FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 1920 0, priv->interface, 1921 buf, 0, WDR_TIMEOUT) < 0) { 1922 err("urb failed to clear flow control"); 1923 } 1924 } 1925 1926 } 1927 return; 1928 } /* ftdi_termios */ 1929 1930 1931 static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file) 1932 { 1933 struct ftdi_private *priv = usb_get_serial_port_data(port); 1934 unsigned char buf[2]; 1935 int ret; 1936 1937 dbg("%s TIOCMGET", __FUNCTION__); 1938 switch (priv->chip_type) { 1939 case SIO: 1940 /* Request the status from the device */ 1941 if ((ret = usb_control_msg(port->serial->dev, 1942 usb_rcvctrlpipe(port->serial->dev, 0), 1943 FTDI_SIO_GET_MODEM_STATUS_REQUEST, 1944 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE, 1945 0, 0, 1946 buf, 1, WDR_TIMEOUT)) < 0 ) { 1947 err("%s Could not get modem status of device - err: %d", __FUNCTION__, 1948 ret); 1949 return(ret); 1950 } 1951 break; 1952 case FT8U232AM: 1953 case FT232BM: 1954 case FT2232C: 1955 /* the 8U232AM returns a two byte value (the sio is a 1 byte value) - in the same 1956 format as the data returned from the in point */ 1957 if ((ret = usb_control_msg(port->serial->dev, 1958 usb_rcvctrlpipe(port->serial->dev, 0), 1959 FTDI_SIO_GET_MODEM_STATUS_REQUEST, 1960 FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE, 1961 0, priv->interface, 1962 buf, 2, WDR_TIMEOUT)) < 0 ) { 1963 err("%s Could not get modem status of device - err: %d", __FUNCTION__, 1964 ret); 1965 return(ret); 1966 } 1967 break; 1968 default: 1969 return -EFAULT; 1970 break; 1971 } 1972 1973 return (buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) | 1974 (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) | 1975 (buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) | 1976 (buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0) | 1977 priv->last_dtr_rts; 1978 } 1979 1980 static int ftdi_tiocmset(struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear) 1981 { 1982 dbg("%s TIOCMSET", __FUNCTION__); 1983 return update_mctrl(port, set, clear); 1984 } 1985 1986 1987 static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) 1988 { 1989 struct ftdi_private *priv = usb_get_serial_port_data(port); 1990 1991 dbg("%s cmd 0x%04x", __FUNCTION__, cmd); 1992 1993 /* Based on code from acm.c and others */ 1994 switch (cmd) { 1995 1996 case TIOCGSERIAL: /* gets serial port data */ 1997 return get_serial_info(port, (struct serial_struct __user *) arg); 1998 1999 case TIOCSSERIAL: /* sets serial port data */ 2000 return set_serial_info(port, (struct serial_struct __user *) arg); 2001 2002 /* 2003 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 2004 * - mask passed in arg for lines of interest 2005 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 2006 * Caller should use TIOCGICOUNT to see which one it was. 2007 * 2008 * This code is borrowed from linux/drivers/char/serial.c 2009 */ 2010 case TIOCMIWAIT: 2011 while (priv != NULL) { 2012 interruptible_sleep_on(&priv->delta_msr_wait); 2013 /* see if a signal did it */ 2014 if (signal_pending(current)) 2015 return -ERESTARTSYS; 2016 else { 2017 char diff = priv->diff_status; 2018 2019 if (diff == 0) { 2020 return -EIO; /* no change => error */ 2021 } 2022 2023 /* Consume all events */ 2024 priv->diff_status = 0; 2025 2026 /* Return 0 if caller wanted to know about these bits */ 2027 if ( ((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) || 2028 ((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) || 2029 ((arg & TIOCM_CD) && (diff & FTDI_RS0_RLSD)) || 2030 ((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS)) ) { 2031 return 0; 2032 } 2033 /* 2034 * Otherwise caller can't care less about what happened, 2035 * and so we continue to wait for more events. 2036 */ 2037 } 2038 } 2039 return(0); 2040 break; 2041 default: 2042 break; 2043 2044 } 2045 2046 2047 /* This is not necessarily an error - turns out the higher layers will do 2048 * some ioctls itself (see comment above) 2049 */ 2050 dbg("%s arg not supported - it was 0x%04x - check /usr/include/asm/ioctls.h", __FUNCTION__, cmd); 2051 2052 return(-ENOIOCTLCMD); 2053 } /* ftdi_ioctl */ 2054 2055 2056 static void ftdi_throttle (struct usb_serial_port *port) 2057 { 2058 struct ftdi_private *priv = usb_get_serial_port_data(port); 2059 unsigned long flags; 2060 2061 dbg("%s - port %d", __FUNCTION__, port->number); 2062 2063 spin_lock_irqsave(&priv->rx_lock, flags); 2064 priv->rx_flags |= THROTTLED; 2065 spin_unlock_irqrestore(&priv->rx_lock, flags); 2066 } 2067 2068 2069 static void ftdi_unthrottle (struct usb_serial_port *port) 2070 { 2071 struct ftdi_private *priv = usb_get_serial_port_data(port); 2072 int actually_throttled; 2073 unsigned long flags; 2074 2075 dbg("%s - port %d", __FUNCTION__, port->number); 2076 2077 spin_lock_irqsave(&priv->rx_lock, flags); 2078 actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; 2079 priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED); 2080 spin_unlock_irqrestore(&priv->rx_lock, flags); 2081 2082 if (actually_throttled) 2083 schedule_work(&priv->rx_work); 2084 } 2085 2086 static int __init ftdi_init (void) 2087 { 2088 int retval; 2089 2090 dbg("%s", __FUNCTION__); 2091 if (vendor > 0 && product > 0) { 2092 /* Add user specified VID/PID to reserved element of table. */ 2093 int i; 2094 for (i = 0; id_table_combined[i].idVendor; i++) 2095 ; 2096 id_table_combined[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 2097 id_table_combined[i].idVendor = vendor; 2098 id_table_combined[i].idProduct = product; 2099 } 2100 retval = usb_serial_register(&ftdi_sio_device); 2101 if (retval) 2102 goto failed_sio_register; 2103 retval = usb_register(&ftdi_driver); 2104 if (retval) 2105 goto failed_usb_register; 2106 2107 info(DRIVER_VERSION ":" DRIVER_DESC); 2108 return 0; 2109 failed_usb_register: 2110 usb_serial_deregister(&ftdi_sio_device); 2111 failed_sio_register: 2112 return retval; 2113 } 2114 2115 2116 static void __exit ftdi_exit (void) 2117 { 2118 2119 dbg("%s", __FUNCTION__); 2120 2121 usb_deregister (&ftdi_driver); 2122 usb_serial_deregister (&ftdi_sio_device); 2123 2124 } 2125 2126 2127 module_init(ftdi_init); 2128 module_exit(ftdi_exit); 2129 2130 MODULE_AUTHOR( DRIVER_AUTHOR ); 2131 MODULE_DESCRIPTION( DRIVER_DESC ); 2132 MODULE_LICENSE("GPL"); 2133 2134 module_param(debug, bool, S_IRUGO | S_IWUSR); 2135 MODULE_PARM_DESC(debug, "Debug enabled or not"); 2136 module_param(vendor, ushort, 0); 2137 MODULE_PARM_DESC(vendor, "User specified vendor ID (default=" 2138 __MODULE_STRING(FTDI_VID)")"); 2139 module_param(product, ushort, 0); 2140 MODULE_PARM_DESC(vendor, "User specified product ID"); 2141 2142