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